Getting Pure Sine Waves from Electronic Inverters

On February 2, 2018, in Other, by Lambert

Digital signal processors (DSPs) are being used in switching power supplies able to synthesize pure sine waves for use in high-reliability (hi-rel) military applications.


Ruggedized digital inverters were installed in the M1068, a Command Communications variant of the U.S. Army’s M113 family of armored personnel carriers. The original M113 Armored Personnel Carrier was first fielded in Vietnam. To date, an estimated 80,000 M113s, including a long list of variants, have been produced and used by over 50 countries worldwide, making it one of the most widely used armored fighting vehicles of all time.


During this time, the M113 has been continuously updated to meet the demands of the modern battlefield. Since then, the M113 family of vehicles are being upgraded, reconfigured and introduced as entirely new systems, including the M1068.


The M1068 variant is used as a tactical operations center capable of long range communications and includes 4.2-kW auxiliary power unit (APU) mounted on the right front of the vehicle to provide 24-V power.


As part of this project, BAE Systems required two hi-rel, ruggedized 2.5-W pure sine wave inverters per vehicle to convert 24 Vdc power generated by the vehicle-mounted APU into usable multi-kilowatt levels of ac for powering communications devices, lighting, computers and other electronic devices.


Although more expensive, pure sine wave inverters provide cleaner utility-grade power than quasi-sine-wave models. Pure sine wave inverters are helpful when operating sensitive electronic devices, including communications equipment, that require high-quality waveform with little harmonic distortion.


In addition, pure sine wave models have a high surge capacity, which means they are able to exceed their rated wattage for a limited time. This lets vehicle motors start easily, though they can draw many times their rated power during start up.


Bob Seidenberg, former Senior Quality Assurance Manager with BAE Systems, explained that the 2.5-kW inverters also had to meet shock and vibration requirements that could only be met by hi-rel inverters.


“The shock requirement for the inverters installed on the M1068 was close to 30 gs, in three directions (vertical, horizontal and transverse) and the vibration spectrum was also demanding,” he said.


The pure sine wave supplies come from Magnetic Design Labs in Santa Ana, Calif. According to Kamran Kazem, MDL VP and chief technology officer, despite the 30-g requirement for the M1068, the military specified that the inverters had to withstand 100 gs. This was well beyond the amount of shock the vehicle would ever realistically experience, based on military tests conducted in the roughest terrain that maxed out at 15 gs.


Kazem added that hi-rel electronic systems and components are no longer the exclusive domain of aerospace and defense. Today, medical, transportation, communications, infrastructure and industrial all have applications where the price of failure is high.


“These power converters might not have to withstand the same extreme conditions as the military, but vibration, shock, humidity and other inherent environmental problems are still factors, so the need for hi-rel and rugged power converters certainly applies to those markets as well.”


DSP is also a key element in a new generation of modular, stackable inverter options designed to provide a range of 1 to 20 kW of dc-ac power through a single, customizable unit. This type of system, available from custom power converter designers like MDL, consists of rack-mounted inverter modules that can stack in a parallel configuration, letting the user add as many inverters as needed to meet the power requirements.


Each unit connects to a communications controller that is responsible for synchronization, load sharing and any external communications. The individual inverters are hot swappable, enabling the addition or replacement of modules on the fly.


“This type of modular design provides project managers with a system that fits their power requirements without having to develop a new unit just for their specific project,” Kazem said. “This eliminates the need for many application-specific designs, and could also enable faster delivery of the power converter at a much more economical cost.”


Article Source: Power Electronic Tips


7 Benefits of a Fingerprint Time Attendance System

On November 15, 2017, in Electrode Products, Other, by Lambert

For over a century, biometrics has been used to identify criminals. Today, this technology is quickly becoming a form of identity verification in non-conventional ways. From mobile banking to smartphone security, society is embracing the need to protect important information.


The workplace is no different, with more companies seeking smarter ways to track time and attendance. Recognizing that this area of business operations can impact profits, many are choosing a fingerprinting method.


This allows companies to positively identify each employee. Doing so eliminates wasteful practices. Through the technology of biometric timekeeping systems, companies now have a solution that saves time and money.


Here, we look at seven benefits that using a fingerprint time attendance system provides. Companies that choose to switch from traditional time tracking processes will soon realize it was worth the investment.


  1. Clock-in accuracy is improved.

Fingerprint biometrics is the most reliable personalized way of determining an employee’s identity. No two sets of fingerprints are alike. Employees cannot engage in buddy punching because it is impossible to pretend to be someone else.


This clock in system provides a distinctive, measurable characteristic that makes it is impossible for employees to steal time. Passwords can be easily shared or replicated. However, the biometric clock invalidates punches that do not match stored data.


Unique biometric identifiers guarantee that employees only clock-in for themselves. This gives managers accurate data for attendance reports. Furthermore, this type of system reduces – and possibly eliminates – costly errors.


  1. Internal processes have higher security features.

Businesses that are responsible for securing sensitive data must have solid internal processes. Giving people free access to entering the building is not the best way to ensure data remains safe. Critical information is only as secure as the room in which it is stored.


A time clocking in system that requires fingerprint identification keeps secured information secure. As a convenient security solution, employees are not encumbered with badges or remembering passwords.


The expense of replacing lost badges and ID cards can eat away company profits. Besides, people may forget passwords, making traditional security methods a nuisance to daily operations.


  1. Entry points of a building are secured.

Equally important is making sure all entry points of the building are secure. The added layer of security keeps data and everyone who enters the building safe. This includes visitors who may want to maintain privacy, depending on the type of business.


The fingerprint time system ensures employees check-in for them. It also helps to keep unwanted visitors from entering the building on false pretenses. For example, an employee who works at a bank might lose her ID badge. If someone found it, they could enter a secured area of the bank without having to prove they are the person to whom the badge was issued.


Biometrics keeps the right people in and the wrong people out. Because of the electronic setup, the system can be placed at every entrance.


  1. Fingerprint time clock systems are always available.

Improved synchronization with the Linux operating system makes the latest technology for biometric time clocks consistent. Availability is never in questions because the system uses Dynamic Host Configuration Protocol, or DHCP, for IP addresses.


This delivers remote configuration capabilities so employees can use a web browser to clock in and out. Additionally, time and attendance data is never lost. Stored memory allows employees to enter their arrival and departure during a network outage.


  1. Fingerprint time clocks can integrate with other business systems.

Integration with business systems that are important to daily operations is an added convenience. Onsite installation is possible to ensure an easy centralized network interface exists. Other clocking systems like desktop models or proximity clocks can merge with a biometric system.


HR managers can simplify payroll integration with a faster, more accurate processing system. Biometric time clocks track time and attendance in error-free fashion. Supervisors view and approve electronic timesheets.


The interface with outside payroll providers allows supervisors to export the data at the end of every pay period. Automatic calculations ensure the once time-consuming payroll process is completed quickly with up-to-date work hours.


  1. Companies can easily expand with a scalable system.

Biometric systems are flexible and easily scalable for companies of every size. If expansion is in the future, this investment grows with it. Whether companies add new locations or more employees at one location, investing in a new system is not necessary. Employees connect to a centralized time tracking system in the office, at home or overseas.


  1. An automated workplace functions better with the biometric fingerprint time clock.

Companies are always looking for efficient processes to save on operational and labor costs. Biometric fingerprint time clocks offer these options. Problems with traditional time clock system are eliminated. Employee identification is authenticated at every entry point.


Managers no longer deal with inefficiencies of manual time recording. Instead, companies see real returns with smoother timekeeping processes. Manual processing by payroll clerks and employees over-estimating their time are rife with excessive costs.


The automated platform that comes with fingerprint time clocks help to decrease labor costs. Less time is spent processing payroll. This essential business task becomes easier to complete while eliminating human errors.


Conclusion: Biometric fingerprint time clock and workforce management is the perfect pair.

Companies must consider the benefits of switching from a traditional time tracking method to a fingerprint time clock. Keeping in mind that biometrics has been used effectively in the workplace, it is easy to understand how this technology is beneficial to workforce management.


Misconceptions and confusion persists, despite the reputation of biometric systems. Countering facts with concerns helps to make this an easy choice. Biometrics give employers the ability to capture real-time labor data.


Using a fingerprint time system delivers a secure, safe and accurate way to keep employee attendance records. The broad range of direct and indirect cost benefits allows companies to see a significant reduction in these costs.


Through automated processes and individualized recognition, companies will not lose money or secure data. Employees cannot buddy punch; when they do arrive at work, they can safely enter the building.


If you need an excellent fingerprint time attendance system, try to check out the website of Pongee: www.pongee.com. The company is the professional manufacturer of access controller and time attendance systems. Feel free to contact them.



Article Source: https://advancesystemsinc.com/7-benefits-fingerprint-time-clock-system/


What are Aerial Mapping and Its Advantages?

On April 28, 2017, in Electrode Products, Other, by Lambert

What exactly is geo-mapping and aerial survey?


We believe that the future of aerial surveying is not fixed and static, but flexible and dynamic. It´s a great way to receive data for orthophotos, 3D models in high resolution with great accuracy. We also offer you an in-house flight planning software, suited for simple dealing with data and parameters.


Aerial survey is a great solution for various kinds of applications. It can be used to deal with challenging sites such as quarries, sand pits, landfills, coal stockpiles. When using the drones in order to create aerial maps, you can undoubtedly go places that conventional equipment cannot reach. Moreover, you acquire more safety for your surveying staff and save time and costs.


Advantages of aerial mapping


Connection of a drone and a very precise GPS receiver is one of the crucial areas of the future aerial mapping development. Another important feature is special software, suited for data processing and virtual map making. This software allows importing the data gathered by the precise GPS receiver. Each image is connected to a required data package, which is important for further georeferencing and coordinate system making.


A common UAV survey can typically produce up to 500 high quality images per square kilometer, at 1cm to 5cm resolution. In addition, the detail obtained from the individual imagery or orthorectified mosaics usually surpasses anything else what is presently accessible even from satellite or classical aerial photography.


Aerial mapping step by step


The first step of UAV mapping is always preparation. There you should define your requirements and flight parameters, such as altitude, airspeed, overlap and distances. In a next step is done the actual flight plan, including precise directions, amount, routes and such. As a next step is usually recommended to create control points for each hectar in order to achieve high accuracy geo-referencing. After that follow flight operations. Common recording while surface flight is performed at a 90° degree angle for capturing the images orientated straight down to the surface.


GPS coordinates are connected directly to the photo’s data, which allow processing the geo-referenced data in many GIS systems. After all that you can finally create 3D models and orthophotos. Conventional aerial photos are limited regarding their use in GIS because they are not true to scale. In order to create a scale correct photograph that can be accurately measured, an orthographic projection is definitely necessary, in which the view is straight down over every point in the photo. An orthographic photo can be really used to measure precise distances, for it is an accurate representation of the Earth´s surface.


Carbon-Based Technology, Inc. devoted in complete system design, integration, manufacturing, and global marketing of Unmanned Aircraft System. We not only can offer high reliability Unmanned System as a platform for “Intelligence Gathering”, but also can offer total solutions for various aspects. If you need further details about aerial mapping and UAVs, welcome to browse our website or contact with Carbon-Based directly!



Article Source: http://vespadrones.com/uav-mapping/

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Multiple Connectivity Modes with Biometric Access Control

On March 21, 2017, in Electrode Products, Other, by Lambert

Biometric Access Control is the new age technology that has revolutionized attendance and access systems like never before. The age of swapping cards and proxy punching is long gone and now all organizations are adopting this new technology which uses various human traits such as fingerprint scanning, retina scanning and facial recognitions in place of swapping cards and passwords. The benefit of these human traits is that they are unique to every individual and cannot be duplicated or stolen.


Every year organizations lose a huge sum of money due to time thefts and unnecessary manual work of calculating wages and working days of each and every employee. This is not only tiresome and time consuming but also costs a lot of money. No organization can afford such costs in this highly competitive world. So many organizations are now switching to biometric scanning processes which enable them to save money and also time.


Biometric technology has various modes of connectivity and access depending on the needs and want of any organization. Manufacturers of these scanners keep the needs of the customers in mind and provide them with customized technologies most compatible with their employees and their requirements. The different modes include fingerprint scanning, which include the scanning of fingerprints of every employee while entering or leaving the office. Retina scanning is the process by which the iris, retina and other features of the human eye are scanned and then admission is allowed to any individual inside any high secure facility. Retina scanners are really very accurate and personalized. Many high risk government and private facilities use a combination of fingerprint scanning and retina scanning in order to provide maximum security and to ensure that only authorized personnel are allowed to enter. Facial recognition includes scanning the vital points of any individuals’ face that differentiate it from any other individual.


Thus latest biometric technology is the technology of the next age and many organizations have already started using it. Preliminary results have been very promising and many are inclined to follow the trend in near future. Its products are very reliable. These biometric systems are now available easily and you can access them as per your convenience and requirements. So don’t be late and order a biometric scanner as per your requirements as soon as possible. It’s high time to upgrade yourself if you don’t want to lag behind in this competitive world.


Quality biometric access control system manufacturer – Pongee, providing fingerprint time attendance, face recognition access controller and USB fingerprint scanner in this series. Our biometric access controllers with time recorders are high security, easy to start and easy to use. Welcome to browse the specification about our biometric access control systems and feel free to contact with Pongee for more details!



Article Source: http://EzineArticles.com/9011041



Anti-Glare Protective Film Features

On October 17, 2016, in Other, Touch Screen, by Lambert

A great way to combat computer eye strain is to install an anti-glare protective film. You’ll find only a few out there and they range from the huge hang off the monitor type to the film overlay on the LCD screen. Using any of these, you could possibly get rid of nearly all of the UV light that reflects from your screen into your eyes. Good protective film is good eye protection.


The best protective film and the one that provides the best value for the money are the anti-glare, non-adhesive protective films. The thin film slides between the LCD screen and the display case and stays in place without slipping. Screen protectors take in 99% of the UV rays that hit your LCD screen and so decreasing the glare and UV light bounce back to your eyes. Anti-glare protective films also are easy to install, less than two minutes and you are all set. It can be cleaned without harming the film or the monitor.


Anti-glare protective films have several features. The majority of tablets and smart phones anti-glare screen protectors not just cut down on glare. A lot of brands claim to cut down on the visibility of fingerprints and also provide an application process that helps prevent bubbles from forming under the film. The last mentioned is a vital feature, because bubbles are not only unpleasant, they can also affect the device’s capacity to detect the movements of your fingers on its surface. Several anti-glare screens also come with microfiber cloths that you can use to easily clean it.


The anti-glare protective film is now considered an absolute necessity for individuals who own a touch screen gadget. This is a method of guarding their beloved gadget from any damage, marks, or cracks. A protective film is a good investment to make your mobile phones and other gadgets last a little longer.


If you need more details about anti-glare protective film, welcome to visit our website and feel free to contact PROCHASE – the professional protective films manufacturer.



Article Source: http://EzineArticles.com/expert/Russ_T_Williams/1225927


Article Source: http://EzineArticles.com/6695613


How to Select the Right Power Inverter for You

On July 18, 2016, in Other, by Lambert



A power inverter is an electronic device that converts electricity from one form to another. Power inverters have become more popular recently as the technology has become more efficient and much more affordable.


The most popular use for a power inverter is converting battery electricity into mains electricity. For example converting your car batteries’ 12 volts DC into mains electricity 240 Volt AC (Australia) or 110 Volt AC (USA).


Power inverters enable mains operated electrical equipment to be used even where there is no mains outlet, like in your car, caravan or even on your boat!


Power inverters bring creature comforts from home when you go camping or caravanning allowing you to use your TV, fridge or electric shaver in fact most of the normal mains powered conveniences from the home.

You can charge your laptop in the car even if it doesn’t happen to have a 12 volt adapter. In fact a power inverter can be a very handy gadget just to have in your car for those times you need to use a mains powered appliance while you’re away from a power socket.




Apart from looking for a good quality well priced product there are a couple of important elements to consider when selecting your power inverter:




Power inverters come in a range of power capacities so selecting the right one for you is very important. Your power inverter needs to be able to provide sufficient power for the equipment you want to use it with.


Here is a brief check list:


  • Check the power consumption for the device you want to power
  • Allow an additional 20% free board
  • Add the power for all the devices you want to run at the same time


Note also that devices with induction electric motors like an power saw may require 3 to 7 times the operating power when they start.


Using an under-powered power inverter may damage it or the appliance you are trying to use, so be sure to check the specific wattage requirements and operating instructions for appliances / tools to be used.




Normal mains power is known as Alternating Current (AC) and is a sine wave shape like the black line in the drawing below


Pure sine wave (black) versus modified sine wave (red)


A typical power inverter produces a ‘modified sine wave output’ like the red line in the drawing above. While this works for most appliances, light dimmers, variable speed drills, sewing machine speed controls, some laser printers etc. will not operate correctly with a modified sine wave power inverter.


Pure sine wave power inverters are especially designed to provide a more accurate sine wave output and so can be used with these appliances, but unfortunately they are more expensive.


Check with your with appliance manufacturer or its specifications to confirm if you can use a conventional power inverter or will need a pure sine wave inverter.




One of the great things about electronic equipment is there is no moving parts (although there is a fan in some models) so you can expect a long serviceable life from a power inverter.




Power inverters generate dangerous mains voltages so ensure the product you choose is approved for use with your mains voltage and supplier.


Power inverters can also generate electro-magnetic radiation that can interfere with other electronic equipment such as radios transmitters etc. Check for compliance with relevant standards such as C-Tick etc.




Power inverters can generate potentially lethal voltages so the utmost of care should be exercised using them to avoid accidental electrocution.




To select your power inverter carefully check the power requirements for the appliance(s) you intend to use it with.


  • Start power – Allow up to seven times for an induction motor
  • Operating power – Allow a 20% margin
  • Pure or modified sine wave


Established in 1999, Power Master is a young and rapidly growing company within DC to AC Power Inverter, AC to DC Battery Charger and UPS industry. We specialize in Modified and Pure Sine Wave Power Inverters, Solar inverter, Inverter with built in Battery Charger, On Line & Off Line UPS, and designed three stage Battery Chargers.


The company with industry integration expertise provides professional solution to accommodate customers’ specific needs in home and office appliances, mobile applications, marine, solar power applications, wind power, electronic equipment, and various applications.



Article Source: http://EzineArticles.com/2731131


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Screw Specialized Manufacturer: Fu Yeh

On April 22, 2016, in Other, by Lambert

Established in 2002, Fu Yeh International Corporation has become a professional Taiwan screw manufacturer for self drilling screw, roofing screw, chipboard screw, self tapping screw, drywall screw, framer screw with head painting, coach screw/ lag screw.


We are specialized in supplying stamping parts, bolt & screw forming tooling. For many years’ experience, Fu Yeh has always focused on the manufacture of quality, cost effective, reliable screws to meet customer requirements in fasteners fields.


We pride ourselves on quality, service and pricing, and believe that all three areas are equally important to ensure the long-term success of your overseas purchasing program. Please do not hesitate in contacting us. Fu Yeh hopes to receive your messages soon.


Your single sources for Taiwan screw manufacturers & suppliers!

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About the Unmanned Aircraft System Supplier

On April 11, 2016, in Other, by Lambert

Carbon-Based Technology, Inc. was established in March 2007 and devoted in complete system design, integration, manufacturing, and global marketing of Unmanned Aircraft System.

We not only can offer high reliability Unmanned Aircraft Systems as a platform for “Intelligence Gathering”, but also can offer total solutions for various aspects. Through this Hi-tech and Hi-reliability UAS platform which is 100% researched & developed in-house, it can integrate with techniques of data processing and analyzing for relative study fields such as GIS and Remote Sensing, Team Carbon-based can offer our clients with totally intact and useful intelligence on the ground as well as in the air. Especially for fields of anti-disaster and geographic spatial application, we have assisted clients from various professions to acquire priceless feedbacks. This also has proved core values of Unmanned Aircraft Systems of Carbon-based Technology!

Our well experienced team will continuously strive for perfection and keep improving our designs and systems for state-of-the-art advance technology for meeting market demands.

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Lapel Pin Supplier

On April 6, 2016, in Other, by Lambert

Your best supplier and best partner Tech Arts International Co., Ltd. is a professional manufacturer of lapel pin for hard enamel lapel pin, soft enamel lapel pins, printing lapel pin, promotional lapel pin, logo lapel pins, eagle lapel pins, pewter key chain, keychain, flashing lapel pin, badges, medals, key chains, tie bars, cuff links, necklaces, bookmarks, money clips and relative metal products since 1967.


We are manufacturing lapel pins not only for collection but also for promotion. We have very fine molders and workers who are able to produce various qualities, depending on your request, design and quantity. With our quality control and high efficiency, we are very pleased to offer our lapel pins guarantee in quality, delivery and service. All copyrighted items in the catalogues are for reference only. They are not allowed to reproduce without owner’s authorization.

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Professional Oil Seals and Rubber Products Manufacturer

On March 31, 2016, in Other, by Lambert

The founder of JENP, Mr.K.M.Su, believes “BRAND IS CAPITAL FOR LONG TERM BUSINESS”, therefore, he started to produce rubber sealing component and rod seals with JENP brand to get involved in global market with constant market share through five continents and exporting rate of 90% of annual sales volume approximately. JENP, the leading rod seal manufacturer, is the orientation of advanced technology to produce high precision tooling and top quality for sealing technology to expand oversea market.

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