CN-224231546-U - Remote transmission type gas density meter

Abstract

The utility model belongs to the technical field of gas density measurement, and particularly relates to a remote transmission type gas density meter. The angle sensor is sleeved at the rotating shaft end of the pointer and used for detecting the deflection angle of the pointer, a remote transmission circuit board is arranged in a remote transmission signal box which is arranged outside the shell, a signal amplifying and filtering circuit, a signal collecting circuit, a main control chip circuit and a wireless communication module are integrated on the remote transmission circuit board, and the input end of the signal amplifying and filtering circuit is connected with the signal output end of the angle sensor. According to the utility model, the deflection angle of the pointer is obtained through the design angle sensor, the angle data is converted into the density value through the main control chip, and the density value is remotely transmitted to the background of the remote terminal, so that the functions of remote monitoring and reading of the density value are realized.

Inventors

• LI JUN

Assignees

• 无锡凯丰电气科技有限公司

Dates

Publication Date

20260512

Application Date

20250530

Claims (7)

1. 1. The remote transmission type gas density meter comprises a shell (1), a spring tube, a movement, a pointer and a bimetal compensation sheet, and is characterized by further comprising: the angle sensor (2) is sleeved at the rotating shaft end of the pointer and is used for detecting the deflection angle of the pointer; The remote transmission circuit board (3) is arranged in the remote transmission signal box (4), and the remote transmission signal box (4) is arranged outside the shell (1); The remote transmission circuit board (3) is integrated with a signal amplifying and filtering circuit (31), a signal collecting circuit (32), a main control chip circuit (33) and a wireless communication module (34), wherein the input end of the signal amplifying and filtering circuit (31) is connected with the signal output end of the angle sensor (2), the output end of the signal amplifying and filtering circuit (31) is sequentially connected with the signal collecting circuit (32) and the main control chip circuit (33), the main control chip circuit (33) is connected with the wireless communication module (34), and the wireless communication module (34) is connected with an external remote terminal (35) in a wireless mode.
2. 2. A remote gas density meter according to claim 1, characterized in that the signal amplifying and filtering circuit (31) is constituted by a programmable gain amplifier (311), a 4 th order butterworth low pass filter (312) and an ADuM3151 digital isolation chip (313) connected in sequence.
3. 3. A remote gas density meter according to claim 1, wherein the signal acquisition circuit (32) employs an AD7124 analog to digital conversion chip.
4. 4. A remote gas density meter as claimed in claim 1, characterized in that the master chip circuit (33) is an STM32 master chip.
5. 5. A remote gas density meter according to claim 1, wherein the wireless communication module (34) is a Zigbee communication module, a lowan communication module, an NB-IoT communication module, or a 5G communication module.
6. 6. A remote gas density meter according to claim 1, further comprising: The air bag chamber (5) is communicated with the inner cavity of the shell (1), a reference air bag (6) is suspended in the air bag chamber (5), and the reference air bag (6) is filled with reference gas and is used as a density reference object; and the reference air bag (6) is in transmission connection with the spring tube through the elastic element.
7. 7. A remote gas density meter according to claim 6, further comprising a meter connector (7), said meter connector (7) being in communication with the interior cavity of said housing (1).

Description

Remote transmission type gas density meter Technical Field The utility model belongs to the technical field of gas density measurement, and particularly relates to a remote transmission type gas density meter. Background The conventional common instruments such as a gas density meter or a gas density relay generally consist of a C-shaped spring tube assembly, a movement, a pointer, a bimetal compensation sheet and the like, wherein the C-shaped spring tube assembly is used as a pressure sensing element, and the bimetal compensation sheet is used as a temperature compensation element. The displacement generated by the pressure of the pressure sensing element is converted and amplified into angular displacement through the movement gear, and the corresponding density value on the dial is displayed through the pointer. The existing remote-transmission type density meter is mainly used for collecting pressure and temperature data through a temperature and pressure sensor, converting the pressure and temperature data into density data through single chip microcomputer operation and processing, and then remotely transmitting the data to the background. However, because the temperature compensation element and the temperature sensor have different sensitivity to temperature change, measurement deviation is generated between the current density values of the temperature compensation element and the remote sensor, which are displayed by the instrument, and accurate remote data cannot be given. Disclosure of utility model The utility model aims to provide a remote gas density meter, which is characterized in that a deflection angle of a pointer is obtained through an angle sensor, angle data are converted into a density value through a main control chip and then are remotely transmitted to a remote terminal background, so that the functions of remote monitoring and reading of the density value are realized. In order to solve the technical problems, the utility model provides a remote transmission type gas density meter, which comprises a shell, a spring tube, a movement, a pointer and a bimetal compensation sheet, and further comprises: The angle sensor is sleeved at the rotating shaft end of the pointer and is used for detecting the deflection angle of the pointer; the remote transmission circuit board is arranged in the remote transmission signal box, and the remote transmission signal box is arranged outside the shell; The remote transmission circuit board is integrated with a signal amplifying and filtering circuit, a signal acquisition circuit, a main control chip circuit and a wireless communication module, wherein the input end of the signal amplifying and filtering circuit is connected with the signal output end of the angle sensor, the output end of the signal amplifying and filtering circuit is sequentially connected with the signal acquisition circuit and the main control chip circuit, the main control chip circuit is connected with the wireless communication module, and the wireless communication module is connected with an external remote terminal in a wireless mode. Preferably, the signal amplifying and filtering circuit is composed of a programmable gain amplifier, a 4-order Butterworth low-pass filter and an ADuM3151 digital isolation chip which are connected in sequence. Preferably, the signal acquisition circuit adopts an AD7124 analog-to-digital conversion chip. Preferably, the master control chip circuit adopts an STM32 type master control chip. Preferably, the wireless communication module adopts a Zigbee communication module, a lorewan communication module, an NB-IoT communication module, or a 5G communication module. Preferably, the method further comprises: The air bag chamber is communicated with the inner cavity of the shell, a reference air bag is suspended in the air bag chamber, and the reference air bag is filled with reference gas and is used as a density reference substance; And the reference air bag is in transmission connection with the spring tube through the elastic element. Preferably, the meter connector is further included, and the meter connector is communicated with the inner cavity of the shell. Compared with the prior art, the utility model has the following beneficial effects: 1. According to the utility model, the pointer deflection angle is detected by the angle sensor, the corresponding signal is output, the pointer deflection angle is processed by the main control chip on the remote transmission circuit board, and finally the density value data corresponding to the angle is transmitted to the remote terminal through the wireless communication module, so that the functions of remote monitoring and reading of the density value are realized. 2. The utility model changes the stress degree of the elastic element through the buoyancy change born by the reference air bag so as to further compensate the deformation of the spring tube by the elastic element, and can more accurat