Key technology of remote control lift rod telemetry remote control system

Time：2020-11-11 View：

Key technologies
Telemetry remote control system is one of the systems needed by remote control lift rod.
The key technologies of remote control and telemetry mainly include sensor technology that determines the measurement accuracy of telemetry system, anti-interference technology to improve the transmission reliability of remote control commands and telemetry data and high-speed data transmission technology to meet the demand of transmitting high-speed telemetry data.

Sensor technology is to use Newton's mechanics, thermodynamics, electrodynamics, quantum mechanics and other theories to develop and apply various sensitive materials and devices, such as sensibility, heat, sound, light, electricity, magnetism, gas, the existence and change of various physical quantities, such as humidity, and the technology of converting them into the existence and change of electric quantity or electric parameter (which can also be other appropriate physical quantities, such as light quantity and light parameter). There are two types of sensors: structural type and physical type. Structural sensor has simple principle, stable and reliable performance, and is widely used; Physical sensor directly uses material effect to combine sensitive function and conversion function into one, with compact structure, small volume, advantages such as light weight and fast response speed.
Anti-interference technology mainly includes error control technology and spread spectrum technology. The essence of error control is to control the quality of data transmission by changing the frequency band and equipment complexity for performance according to channel conditions and bit error rate requirements, so as to achieve the highest efficiency-cost ratio as possible. Error Control methods mainly include forward error correction (FEC), feedback retransmission (ARQ) and hybrid error correction (HEC). Spread spectrum refers to the expansion of radio frequency signal bandwidth by using pseudo random code independent of information to make it much larger than the minimum bandwidth required for sending information. The method of expanding signal spectrum is mainly direct sequence modulation, frequency hopping and their combination. Direct sequence modulation distributes the RF signal power in a wide frequency band to resist interference in a hidden way; Frequency hopping makes the carrier frequency jump in a wide frequency band, anti-interference in a dodging way; Their combination, namely, adding the function of carrier frequency jump on the basis of direct sequence spread spectrum, then the information transmission system not only has strong anti-interference ability and better applicability, but also has technical realizability and better economy.

To transmit high-speed data, we must consider both frequency resources and transmission quality. The technical method to solve the problem of frequency resources is mainly to increase the work frequency band of transmission system to increase frequency resources, improve the utilization rate of frequency band to make full use of frequency resources and save frequency resources reasonably. The technical methods to improve the transmission quality of the transmission system are to reasonably design the base band signal, select the coding and decoding system suitable for transmitting high-speed data and appropriate modulation and demodulation methods, and use frequency domain equalization or time domain equalization.