The invention provides a method for testing high-voltage transmission line television interferences The method comprises the following steps of analyzing television signal frequency bands of a tested area and recording television images before television interferences, selecting a measuring position, selecting antennas according to the frequency range of television interferences, and selecting television interference field intensity frequencies and measuring television interference field intensity According to the method for testing high-voltage transmission line television interferences, the television interference field intensity generated by corona of a high-voltage transmission line is measured, interfered television images are obtained at the same time, the interference degree of television signals and images is evaluated, and the blank of the current high-voltage transmission line television interference testing method is filled

Method for testing high-voltage transmission line television interferences

The invention discloses a device and a method for testing signal receiving performance of a vehicle-mounted Beidou compatible GPS navigation antenna. The device comprises a Beidou compatible GPS navigation signal simulating and transmitting module for simulating a Beidou satellite signal and a GPS satellite signal, a Beidou compatible GPS navigation signal transmitting antenna for transmitting the signals output by the Beidou compatible GPS navigation signal simulating and transmitting module to a space, a Beidou compatible GPS navigation signal receiving module for receiving, processing and analyzing the Beidou satellite signal and the GPS satellite signal received by the detected vehicle-mounted Beidou compatible GPS navigation antenna, and a darkroom, wherein the Beidou compatible GPS navigation signal transmitting antenna is connected with the Beidou compatible GPS navigation signal simulating and transmitting module, and the Beidou compatible GPS navigation signal receiving module is connected with the detected vehicle-mounted Beidou compatible GPS navigation antenna. By means of the device and the method for testing the signal receiving performance of the vehicle-mounted Beidou compatible GPS navigation antenna, the receiving performance of the vehicle-mounted Beidou compatible GPS navigation antenna can be assessed.

Device and method for testing signal receiving performance of vehicle-mounted Beidou compatible GPS navigation antenna

The invention discloses a second-generation beidou anti-jamming satellite navigation equipment detection method and system. The detection system comprises a regenerative synchronous signal source capable of performing communicating through a wireless network, an interference source with the adjustable power, and a detection receiver, wherein the regenerative synchronous signal source comprises an outdoor receiving antenna, a signal regeneration processing device and an indoor transmitting antenna; the outdoor receiving antenna is connected with the input end of the signal regeneration processing device through a coaxial cable; and the indoor transmitting antenna is connected with the output end of the signal regeneration processing device through a coaxial cable. According to the second-generation beidou anti-jamming satellite navigation equipment detection method and system, the defect that a traditional detection scheme depends on an outdoor satellite signal when a test platform is built is overcome; and the anti-jamming function testing in an indoor environment is achieved.

Second-generation beidou anti-jamming satellite navigation equipment detection method and system

The invention discloses a digital integrated test technology of a high-pressure gas source system, relates to the field of gas source system detection. According to the technology, a control computer, an external gas source, a load, a stop valve K1, a pressure gauge P1, a solenoid valve, a stop valve K2, a first pressure transmitter, a tested high-pressure air passage system, a second decompressor, a first decompressor, a first overflow valve, a second overflow valve, a pressure gauge P2, a pressure gauge P3, a third pressure transmitter, a second pressure transmitter, a stop valve K4, a stop valve K3, a first flow meter and a second flow meter in connection are used. The integrated test method can be used to greatly reduce time and resource, prevent connection complexity and repletion of test pipelines, and enable test to be convenient and efficient; and the technology with safety design avoids hidden safety hazards and makes test safe and reliable.

Digital integrated test technology of high-pressure gas source system

The invention discloses an inspection vehicle for high precision dynamic satellite navigation equipment. The inspection vehicle comprises a vehicle body and an equipment cabinet, wherein a satellite signal receiving antenna and an outdoor antenna of a mobile phone signal enhancing system are arranged outside the top of the vehicle body, and a ceiling type liquid crystal display is arranged inside the top of the vehicle body; the left part of the equipment cabinet is of a multi-layer shelf structure, and an embedded industrial personal computer, a one-in-four satellite signal controller, a satellite navigation benchmark device, a mobile phone signal enhancing device, an inverter, a double storage battery isolator, a power distribution panel, a storage battery and a battery charger are arranged on the shelf; the right part of the equipment cabinet is designed into a black box structure with the inner wall having the electromagnetic signal absorbing capacity, electromagnetic shielding material adheres to the inner wall of the black box, a satellite signal retransmission antenna and an indoor antenna of the mobile phone signal enhancing system are arranged on the top of the black box, and the satellite navigation equipment to be detected is placed at the bottom of the black box. The inspection vehicle has the advantages of being novel in structure, convenient to operate, high in dynamic nature, high in inspection accuracy and the like.

Inspection vehicle for high precision dynamic satellite navigation equipment

The utility model relates to a testing device for an indoor anti-interference satellite navigation system, which comprises a satellite signal receiver, wherein the satellite signal receiver is connected with a satellite signal simulator through a radio-frequency receiving cable, and the satellite signal simulator is connected with a satellite signal transfer box through a transmitting cable. The testing device has small volume and a simple structure, and is applicable to testing of the satellite navigation system, extremely high economy and authenticity are embodied, cables with different lengths and the transfer boxes can be selected according to different application environments so as to realize testing on the satellite navigation system in different application environments, therefore, better generality can be achieved.

Testing device for indoor anti-interference satellite navigation system

The utility model relates to a maintenance-free high-pressure gas cartridge combined device, which belongs to an aircraft gas source system. Two cylindrical cartridges connected via a pipeline are fixedly connected via a front connecting plate and a rear connecting plate, one gas cartridge is provided with a deflating port, the other gas cartridge is provided with an inflating port, an electric explosive valve is fixedly mounted on the front connecting plate, one end of the electric explosive valve is connected with the deflating port while the other end is connected with a decompressor via a buffering pipeline, the decompressor is further connected with a gas channel distributor, and the gas channel distributor is connected with a gas supplying port and a test port which are fixedly mounted on the rear connecting plate. By adopting sealing welded-in technique and once decompression technique, the maintenance-free high-pressure gas cartridge combined device structurally realizes integral design, and has the advantages of compact structure, stable performance, convenient utilization, avoidance of maintenance, high precision and the like.

Xiaojun Wang

Papers

Testing device for indoor anti-interference satellite navigation system

Maintenance-free high-pressure gas cartridge combined device