33results about How to "Realize long-distance wireless transmission" patented technology

The invention relates to an automatic detection instrument for the weld seam of the bottom plate of a storage tank based on wireless transmission, which includes a body, a synchronous positioning and map building module, a wireless data communication module, and a control mechanism. The two sides of the frame are installed to drive the rear wheels, and the front end of the machine body protrudes forward to a bottom plate. The non-destructive testing mechanism is installed on the bottom plate. The non-destructive testing mechanism has two air-coupled ultrasonic probes with adjustable positions. The two air-coupled ultrasonic probes are V-shaped. Tilt setting, laser seam tracker is placed between two probes; infrared camera and infrared sensor are installed on the top of the body; The detection mechanism, the laser seam tracker, the infrared camera, and the infrared sensor are respectively connected to the control mechanism. The invention realizes the intelligent detection and evaluation of the welding seam of the bottom plate, and greatly reduces the cost of manual detection.

The invention relates to a third generation (3G) communication network-based transmission line fault area positioning system. The system consists of three subsystems, namely a signal acquisition system, a data transmission-remote terminal control system and a monitoring centre control system. A manager uses a common microcomputer as an operating terminal which does not need to install any special program, and can access a monitoring centre system anytime and anywhere, know a fault state in time, determine a fault position rapidly, perform data inquiry, and participate in fault removal processing. For the manager using a mobile phone, the mobile phone can serve as a terminal for receiving fault information in real time. Therefore, transmission line fault monitoring forms a complete network system. Moreover, the labor intensity of workers is greatly reduced; the labor efficiency is improved; and the fault positioning accuracy is improved greatly.

The invention discloses an intelligent wheel stopper system based on wireless communication, which comprises an intelligent wheel stopper monitoring instrument, a wireless communication network, an Internet network, a databank server and a remote monitoring center. The intelligent wheel stopper monitoring instrument, served as an instrument for acquiring, processing and transmitting field data, comprises a displacement sensor, a balance tilt angle sensor, a pressure sensor, a shaping circuit, an embedded type microprocessor and a serial port communication module, a wireless communication module, a real-time clock unit, a watchdog unit, a keyboard input unit, an LCD display unit, a power supply module unit, an EEPROM unit and an alarm unit. The intelligent wheel stopper monitoring instrument carries out collection treatment on field data which is sent out by the wireless communication module. The remote monitoring center receives information sent by the wireless communication module, manages and records working state information of the intelligent wheel stopper monitoring instrument and simultaneously sends a control command and data to the intelligent wheel stopper monitoring instrument through the wireless communication module. The intelligent wheel stopper monitoring instrument is connected with the remote monitoring center through the wireless communication network and the Internet network. The intelligent wheel stopper monitoring instrument is accessed into the wireless communication network through the wireless communication module. The remote monitoring center is connected with the Internet network through the databank server and completes communication with the wireless communication network through a gateway.

The invention discloses an electrical impedance spectrum detection system for crops. The system comprises an electrical impedance spectrum detection unit, an impedance analysis unit, a microcontrol unit and an upper computer, wherein the microcontrol unit is connected with the upper computer and is used for receiving working parameters, set by the upper computer, of the impedance analysis unit and transmitting the working parameters to the impedance analysis unit; the impedance analysis unit is used for generating a first unipolar sinusoidal signal according to the working parameters and outputting the first unipolar sinusoidal signal to the electrical impedance spectrum detection unit; the electrical impedance spectrum detection unit is used for converting the first unipolar sinusoidal signal into constant current and loading the constant current to the crops to acquire a voltage signal of the crops, and converting the voltage signal into a second unipolar sinusoidal signal and inputting the second unipolar sinusoidal signal to the impedance analysis unit; and the upper computer is used for processing the second unipolar sinusoidal signal acquired through the microcontrol unit and displaying an electrical impedance spectrogram of the crops. The invention also discloses an electrical impedance spectrum detection method for the crops. Through the system and the method of the invention, the living body crops can be detected without damaging electrical impedance spectra conveniently in the long term in a greenhouse.

The invention provides a method for remote collection of microscopic images of fungal spores in the air. The glass slide can be automatically replaced, and the spore adsorbent can be evenly applied automatically. Different capture times can be set when spores are captured in the air, and fungal spores can be enlarged according to requirements. Real-time collection of microscopic images at 100-400 times, remote wireless transmission of image information can be realized through wireless transmission technology, and continuous monitoring of fungal spores can be realized through solar power supply; the invention also provides a device for realizing the method, The device includes a slide taking device, stage, grease coating device, spore capture air duct device, microscopic imaging device and solar power supply module, and is equipped with an integrated wireless communication module, which can realize remote wireless transmission of image information. The collection device and method described in the invention can realize remote monitoring of fungal spores in the air.

The invention discloses a cascaded waste heat recovery device for a centrifugal air compressor. The cascaded waste heat recovery device comprises a primary heat medium circulating water part, a secondary heating circulating water part, a circulation cooling water part, a compressed air cooling part and an electric control part. Waste of energy sources is reduced, the heat production recovery rateof the centrifugal air compressor is high, and the centrifugal air compressor is protected better.