【 How to solve the problem of pressure sensor fault 】

In the development of modern sensor technology and computer technology today has to be handled, the combination of a variety of emerging industry developed slowly, the air pressure telemetry system is moving toward the high intelligence, automation, high precision, low cost and miniaturization direction pressure telemetry system by the terminal equipment and wiring equipment ( Pressure sensors, the terminal is located in the station, its role is to line equipment power supply) Automatic measurement, display and print cable pressure values. Line equipment in line, it is will be converted into electrical signals sent to the terminal device, and line equipment is a major means of intake air pressure information, it occupies a pivotal position in the air pressure telemetry system. So, line equipment quality, high and low precision, to reduce the maintenance workload and simplify whipped check process is directly related to the pressure. This paper mainly introduces the pressure sensor faults and correct installation methods. Pressure sensor failure solution: ( 1) Inspection of the cable gas path. ( 2) Electronics means to measure absolute pressure, make the line in the state of the pneumatic control more complete and continuous. ( 3) From two aspects of dynamic and static, can assess gas leakage point in advance. ( 4) Determine the pressure within the wire in the change of time, which can estimate the inflatable Lv, namely in the event of a negative variables, can be pre-determined reduction, thus to determine the final pressure value of pressure sensor fault section and the corresponding diffusion time. The pressure sensor installed correctly as follows: first of all we have to determine the specific installation location of pressure sensor, in order to determine the number and the specific installation location of pressure sensor, need according to the gas network of various inflatable period of consideration. ( 1) For no branching cables, because the base line of cable program, the installation of the pressure sensor separation not gets 500 m, and make the total number of not less than four. ( 2) To determine the pressure sensor fault points, in addition to outside the starting point to install pressure sensors, 150 ~ 200 m from the starting point, and the other one, of course, in the design, installation must consider the factor of economy and technology, where does not need to install the pressure sensor, should be not installed. ( 3) Pressure sensor must be installed along the cables, it is better to install the cable joint. ( 4) Each cable installed pressure sensor is not less than 4, close to the exchange of two pressure sensors, should not be the 200 m apart. ( 5) The beginning of the each cable and terminal installation 1 respectively. ( 6) Branch points each cable should be 1, if two branch points closer apart ( Less than 100 m) Can be only one. ( 7) Cable laying methods ( Aerial and underground) Change place should pack 1 ( 8) Through the proper instrument, under the condition of normal atmospheric pressure and normal temperature, verify the frequency responses of pressure sensor value. ( 9) Verify the pressure sensor of coding and the correctness of the corresponding frequency response signal. With air pressure telemetry equipment production, the pressure sensor for application on the cable. For the normal work of the air pressure telemetering system, pressure sensor need to match with air pressure telemetry equipment, coordination. From pressure telemetering system, ways of working to have a run-off dot '' line selection and' line selection type two kinds. The pressure sensor failures, be sure to reference the reasonable solutions, to better ruled out the problem. So at a certain time to better solve the problems.