44results about How to "Long data transmission distance" patented technology

An automatic measuring rail inspection car, comprising a frame body, characterized in that it also includes: stepping motors arranged at both ends of the frame body, and the stepping motor drives the frame body through the wheels connected thereto; Control processor; a gauge ruler arranged at the bottom of the frame body, the gauge ruler is connected to the control processor through a data line and / or a wireless communication module for transmitting detection data; arranged on the frame body An inkjet printer, which is used for inkjet marking on the rail; a power supply; the stepping motor, the inkjet printer and the power supply are all connected to the control processor. The advantage of the invention is that in product operation, the automatic gauge gauge can completely replace the work of line workers, and the automatic cycle operation is also possible. The automatic measuring track gauge is positioned accurately, and there are obvious inkjet marks for out-of-tolerance measuring points. Whether it is screening from the server side or checking the coding marks, it has brought convenience to the line workers.

The invention discloses a method for achieving DC / AC power conversion and power line carrier communication by sharing an inverter circuit. According to the method, ripple signals are superposed at anoutput port by using components of a grid-connected inverter, and all devices connected to the output port in parallel can detect the signals, so that data can be sent without adding any device through adoption of the method, and a certain signal-to-noise ratio is ensured. Compared with the prior art, the self structure of the grid-connected inverter is directly utilized, extra data sending hardware is not needed, the cost is saved, the data transmission distance is longer, the influence of electromagnetic interference of the inverter is not likely to happen, and the safety and the reliabilityare better; and moreover, when a certain inverter works abnormally, other devices cannot be damaged through a communication line. In addition, the communication ripple amplitude can be adjusted, andthe communication quality can be obviously improved.

In order to solve problems of reduction of laser outputting power and stability caused by the pollution of the laser lens or burning of the lens, CO(SUB)2( / SUB) laser optical path lens temperature detection and temperature difference over limit alarming system are provided, which are composed of a computer temperature detection and temperature difference over limit alarming module in the signal processing component, an ADAM-4520 module, an ADAM-4018 module and a group of thermoelectricity component and each lens of the laser by electrical connection. The gorge line communication cable transmits the collected temperature signal to computer temperature detection and temperature difference over limit alarming module for calculation and process, and displays water temperature signal of the lens component on the monitor in-real time way. When the temperature difference is over-limit, the sound is alarming. Effects: real-time, rapid, precise detection for working state in the lens of the laser optical path; timely and accurately processing laser polluting alarming. The lens working state is improved and using age is enhanced. Function is stable and suitable for long and continuous detection. The data transmission has long distance, strong resisting disturbance ability, which is easy to operate, friendly interface, convenient to integrate and control the system.

The present invention provides an antenna, a ground control system for an unmanned aerial vehicle, and an unmanned aerial vehicle system, wherein the antenna (100) includes a substrate (1), a plurality of dipoles (2) printed on the substrate, A feed network (3) and a grounding plate (4), the dipole (2) includes an oscillator unit (20) arranged on one side of the substrate (1) and an oscillator unit (20) arranged on the other side of the substrate (1) The oscillator unit (20), wherein the oscillator unit (20) includes a first oscillator (21) and a second oscillator (22); the feed network (3) is connected to each oscillator unit (20); the The base plate (1) and the grounding plate (4) are arranged in parallel with a preset distance. The antenna of the embodiment of the present invention has good matching performance and radiation performance, improves the gain of the antenna, and has a long data transmission distance.