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(1) Verify the frequency response of the pressure sensor under normal atmospheric pressure and standard temperature conditions with appropriate instruments.
(2) Verify the correctness of the pressure sensor code and the corresponding frequency response signal.
2. Determine the specific installation location In order to determine the number and the specific installation location of the pressure sensor, it is necessary to consider the various inflation sections of the inflator network.
(1) The pressure sensor must be installed along the cable, preferably at the cable joint.
(2) Each cable shall be equipped with not less than 4 pressure sensors, and shall be close to the two pressure sensors of the telephone exchange and should not be separated by 200m.
(3) Install one at the beginning and at the end of each cable.
(4) One branch point should be installed for each cable. If two branch points are closer (less than 100m), only one can be installed.
(5) One (6) unbranched cable shall be installed at the change of cable laying (overhead and underground), because the cable pattern of the barrier line is consistent, and the installation distance of the pressure sensor is not 500 m. The total number is not less than 4.
(7) In order to facilitate the determination of the pressure sensor failure point, in addition to the installation of the pressure sensor at the starting point, 150 ~ 200m away from the starting point, but also to install an additional one of course in the design, we must consider the economic and technical factors, do not need to install Where pressure sensors are located, they should not be installed.
Pressure sensor failure solution:
(1) Electronic means measure the absolute pressure so that the control of the inflated state of the line is more complete and continuous.
(2) From both dynamic and static aspects, the leak point can be estimated in advance.
(3) Determine the change in the pressure of the cable in time, so that the time of inflation can be estimated, that is, when a negative variable occurs, the amount of reduction can be determined in advance, and thus the final pressure value of the pressure sensor fault segment and the corresponding diffusion are determined. time.
(4) Verify the gas path of the cable.
Along with the production of barometric telemetry equipment, pressure sensors are also used on cables. For the normal operation of the entire air pressure telemetry system, the pressure sensors need to be matched with the air pressure telemetry equipment to coordinate the work. From the pneumatic telemetry system, the working methods are divided into two types: "select line and select points" and "select line". Then there must be a reasonable solution to the pressure sensor failure.
Pressure sensor installation method and troubleshooting solution
Summary of contents: Pressure sensor installation methods and troubleshooting solutions Correct installation of pressure sensors: