Distributed parameter measurement system and method for long-range exhaust system of engine test
A technology of parameter measurement and exhaust system, which is applied in the direction of engine testing, measuring devices, and testing of machine/structural components, etc. It can solve problems such as troublesome troubleshooting and large cable consumption, and achieve the effect of stabilizing the measurement and control system
Active Publication Date: 2019-10-18
XIAN AEROSPACE PROPULSION TESTING TECHN INST
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Problems solved by technology
[0004] In order to solve the problems in the background technology, the present invention adopts an engine that can well avoid signal weakening and interference caused by long-distance signal transmission, troublesome troubleshooting, and relatively large cable consumption when there are a large number of measuring points. Test long-distance exhaust system distributed parameter measurement system and method
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[0040] Such as figure 1 As shown, the present invention provides a distributed parameter measurement system for long-distance exhaust system of engine test, including thermocouple, sensor, temperature acquisition device, pressure flow acquisition device, switch and computer;
[0041] There are multiple thermocouples and they are respectively installed at multiple temperature parameter measuring points; there are multiple sensors and they are respectively installed at multiple pressure and flow parameter measuring points;
[0042] The temperature acquisition device collects the temperature values of multiple thermocouples and sends them to the computer; during the engine test, the engine occupies a large area, and the cost of cables connecting the thermocouples and the temperature acquisition device is relatively high. Therefore, in order to meet the requirements And to save cost, the temperature acquisition device in this case is composed of 2 sets of CRIO acquisition device...
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The invention relates to a measuring system and method for centralized distributed parameters of an engine test long range exhaust system. A number of thermocouples of the system are respectively arranged at a number of temperature parameter measuring points. A number of sensors are respectively arranged at a number of pressure flow parameter measuring points. A temperature collecting device collects the temperature value of a number of thermocouples and sends the temperature value to a computer. A pressure flow collecting device collects the frequency or current signals of a number of sensors, converts the signals into pressure values or flow values, and sends the pressure values or flow values to the computer through a switch. The computer receives pressure signals sent by the temperature collecting device and the pressure flow collecting device and carries out data processing and storage on the pressure signals. The method comprises the steps that 1) a parameter measurement channel table is configured; 2) a coefficient K is acquired through sensor calibration; 3) a coefficient file and the channel table are produced; 4) parameter measurement is carried out; and 5) the system stops working. According to the invention, signal weakness and interference easily caused by long-distance signal transmission can be avoided; troubleshooting is easily carried out; and the measuring system and method are suitable for the case of a large number of measuring points.
Description
technical field [0001] The invention belongs to the technical field of aerospace engine tests, and in particular relates to a distributed parameter measurement system and method for long-distance exhaust systems of engine tests. Background technique [0002] Due to the large scale of the exhaust system of the long-distance test of a large engine, the test measurement system has the characteristics of many types of parameters to be measured, a large number of measurement points and a wide distribution of measurement points. The general engine test measurement system adopts the following methods: [0003] The sensor signal is input to the acquisition device through a long-distance cable, and a computer is used to control the acquisition device to realize the acquisition and storage of parameters; when there are many types and quantities of measurement parameters, multiple sets of acquisition systems and multiple computers are used to realize the parameters. Measurement. This ...
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IPC IPC(8): G01M15/02G01D21/02
Inventor 乔江晖白文义单琳彭飞左明聪寇兴华耿直朱成亮胡瑛
Owner XIAN AEROSPACE PROPULSION TESTING TECHN INST