Troubleshooting of the pressure sensor

With the development of electronic computer technology and electronic components, the air pressure remote measurement system is moving towards high intelligence, automation, high precision, low performance and miniaturization. The air pressure remote measurement system is automatically measured, displayed and displayed by terminal equipment and line equipment. Print the air pressure value of the cable. The line equipment is set on the line, and its function is to convert the sex into an electrical signal and send it to the terminal equipment. The line equipment is the main means of acquiring air pressure information, and it occupies a pivotal position in the air pressure telemetry system. Therefore, the quality and accuracy of line equipment are directly related to reducing maintenance workload and simplifying air pressure checking procedures. This article mainly introduces the failure of the pressure sensor and the correct installation method

Pressure sensor failure solution:

(1) The electronic method measures the air pressure, which makes the control of the inflated state of the line 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 in the cable over time, so that the time of inflation can be estimated, that is, when a negative variable occurs, the reduction can be determined in advance, so as to determine the final pressure value of the pressure sensor fault section and the corresponding Diffusion time.

(4) Check the gas path of the cable.

Correct installation method of pressure sensor:

(1) Verify the frequency response value of the pressure sensor under normal atmospheric pressure and standard temperature conditions through appropriate instruments.

(2) Verify the correctness of the code of the pressure sensor and the corresponding frequency response signal.

2. Determine the specific installation location

In order to determine the number and specific installation location of the pressure sensor, it is necessary to consider each inflatable section of the inflatable net.

(1) The pressure sensor must be installed along the cable and installed at the cable joint.

(2) Each cable is equipped with no less than 4 pressure sensors, and the two pressure sensors close to the telephone office should not be too far apart by 200m.

(3) Install one at the beginning and end of each cable.

(4) One branch point of each cable should be installed. If the two branch points are close (less than 100m), only one can be installed.

(5) One cable laying method (overhead, underground) change place should be installed

(6) For cables without branches, the installation distance of pressure sensors should not be 500m, and the total number should be no less than 4.

(7) In order to facilitate the determination of the failure point of the pressure sensor, in addition to installing the pressure sensor at the starting point, an additional one must be installed at a distance of 150~200m from the starting point. Of course, economic and technical factors must be considered in the design. Where the pressure sensor is located, it should not be installed.