Velocity radar mainly uses the Doppler Effect principle: when the target approaches the radar antenna, the reflected signal frequency will be higher than the transmitter frequency; conversely, when the target goes away from the antenna, the reflected signal frequency will be lower than the emission. Probability. In this way, the relative speed of the target and the radar can be calculated by the frequency change value. Is now widely used in ** speeding test and other industries.
The principle of radar speedometer is that the moving object has a frequency shift effect on the received electromagnetic wave. The radar speedometer obtains the moving speed of the measured object according to the calculation of the received frequency shift of the reflected wave. Therefore, it has the following characteristics:
1. The radar beam is larger than the irradiation surface of the laser beam (radio), so the radar speed is easy to capture the target and does not require precise aiming.
2. The radar speed measuring device can be installed on the patrol car. The detection of the vehicle speed in the movement is a very important part of the "mobile electronic **".
3, radar, sports time measurement error of ± 2Km / h, can completely meet the requirements of traffic violation investigation.
4, the radar beam emitted by the electromagnetic beam has a certain angle, so the effective speed distance is relatively close to the laser speed, the farthest distance is 800M (for the cart).
5, radar speedometer, popular.
6. The angle of the transmit beam of the radar gun is an important technical indicator. The larger the angulation angle, the more susceptible the accuracy of speed measurement; on the contrary, the impact is smaller.
Common models:
1, the United States STALKER BASIC type
The American STALKER BASIC type has the advantages of high test accuracy, short response time, light weight, waterproof drop, resistance to drop of two meters, suitable for field applications, etc. It is an ideal speed measurement tool for transportation. In order to meet the need of user forensics, secondary development is based on this radar, and a printer is customized using the serial port output function carried by the radar. The speed limit can be set on the printer. When the data measured by the radar is transmitted to the printer, the printer It will automatically determine whether the vehicle under test is overspeeding. If it finds that it exceeds the speed limit, it will automatically print. The print content includes: time, speed limit value, and overspeed value. At the same time, reserved: driver's license number, license plate, illegal driver, on-duty personnel, illegal location and other items for duty personnel to fill out.
Specifications: Handheld fixed Doppler radar.
2. EWIG HT3000 type
HT3000 mobile speedometer is a new type of mobile electronic ** system, this type is the latest research and development of high-definition electronic **, 3 million high-definition intelligent traffic camera, Olivia professional speed radar, precision Speed, snapping. Mainly used in public security traffic police vehicle speed test, has been recognized by the majority of traffic police departments, and procurement use, HT3000-type radar gun has occupied the market half of the country's electronic ** system.
The HTIG-D fixed-type high-definition radar speedometer, which is sold by the Hangzhou EW Technology Co., Ltd., is also widely used on the market. It also uses the latest combination of speed radar and 3 million HD cameras. Department of speed enforcement of high-end configuration. The HT3000 series of high-definition electronic ** produced by Hangzhou Laiyu Technology Co., Ltd. plays a decisive role in the field of speed limit of road vehicles in the traffic police force, factory campuses and other departments.
In the field of hand-held radar guns, Hangzhou Laiwu Technology has also developed a model HV300 handheld high-definition speedometer that surpasses other hand-held speedometers on the market. It has 300-resolution high-definition photo, it can achieve overspeed automatic for target vehicles. Snapshot function, so the HV300 can be handheld or portable (roadside tripod). In short, in the handheld photo velocimeter, HV300 radar speedometer has a very high cost performance.
Door Accessories
Door accessories include Automatic Door Kits , High Speed Door Motor And Control Box, High Speed Door Accessories, Other Door Accessories. We can sell any parts of these accessories.
Automatic door kits: Our automatic door kits include 1 motor+gear reducer, 1 belt,7 meter, 1 idle pulley, Microprocessor, 4 sets of carriage blue wheels, 2 sets of floor guides,2pcs remote control, 2 sets belt clamp mounting brackets, 1 power supply harness and cable connectors, 2 locator, Aluminum track whose length is 2.08 meter, 3 meter, or 4 meter. We are a manufacturer of automatic door openers that are designed to provide people convenience. Automatic Door Systems` drive to provide that level of service is but one of the reasons why automatic doors are becoming more and more popular. Our Automatic Sliding Door systems are modern, space-saving and elegant. Automatic sliding doors have many basic functions some of which include: automatic mode with full opening width and/or reduced opening width, and exit only for traffic control. The opening of automatic doors can also be adjustable to make the opening width smaller or larger. Important safety functions such as safety sensors prevent the door from shutting if persons or objects are in the detection zone. If the door leaves are inhibited when closing, they are immediately re-opened or if the door leaves are hindered when opening, they are immediately stopped by a safety automatic reversing mechanism.
High Speed Door motor and control box: Our company have German SEW Motor, Japan Mitsubishi Controller. Our own brand Hofic servo motor and controller. Chinese famous brand SEJ motor and Holip controller. German SEW Motor and Japan Mitsubishi Controller: It is easy to find the ideal energy-efficient motor for your application at SEW. Our rolling gate servo control system is suitable for high speed and high usage soft and hard rolling gate. The whole system is in a small and light package, it has high torque and high operating speed, lower noise, high reliability, smooth and soft operating curves, it`s suitable for high speed and usage environment. SEJ motor and Holip controller: Three-phase asynchronous motor with magnetic brake has broad uses, It is suitable for various mechanical main drive and auxiliary drive, and it is also used for various required rapid stopping and correct positioning.
high speed door accessories: Driving system: High speed door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box. Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light.
Other door accessories: Sectional door accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
For accessories detail information, please kindly check our detail classify.
Door Accessories,Automatic Door Kits,High Speed Door Accessories,Sliding Door Operator
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffreezerdoor.com