Pressure sensor failure solution

With the development of electronic computer technology and electronic components, air pressure remote measurement systems are moving toward high intelligence, automation, high precision, low power and miniaturization. Intake pressure remote measurement system consists of terminal equipment and line equipment (pressure sensor, terminal The equipment is located in the office and its function is to supply power to the line equipment. It automatically measures, displays and prints the pressure value of the cable. Line equipment is set up on the road, its function is to convert sexuality into electric signal to the terminal equipment, and the line equipment is the main means of ingesting pressure information, it occupies a pivotal position in the pressure remote measurement system. Therefore, the quality of the line equipment, the level of accuracy, there is a direct relationship between reducing the maintenance workload and simplifying the pressure inspection process. This article mainly introduces pressure sensor failure and correct installation method

Pressure sensor failure solution:

(1) Electronic means measure the absolute pressure, making the control of the state of airline inflation 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 during the 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, thus determining the final pressure value of the pressure sensor fault segment and the corresponding diffusion time.

(4) Verify the gas path of the cable.

Pressure sensor correct installation method:

(1) Verify the frequency response of the pressure sensor by means of a suitable instrument under normal atmospheric pressure and standard temperature conditions.

(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 position of the pressure sensor, it is necessary to consider the respective inflation section of the inflator.

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

(2) There shall be no less than 4 pressure sensors installed on each cable, close to the two pressure sensors of the telephone exchange and shall 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) 1 cable installation method (heading, underground) change should be installed

(6) For unbranched cables, because the cable patterns of the barriers are the same, the installation distance of the pressure sensor is not 500m and 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.

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, 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 point selection" and "select line". Then there must be a reasonable solution to the pressure sensor failure.