Thermal gas flowmeter and application thereof

A technology of thermal gas flow and gas flow channel, which is applied in the application of thermal effects to detect fluid flow, etc., can solve the problems of large influence by installation conditions and poor measurement accuracy, and achieve no risk of clogging, little influence, and high measurement accuracy Effect

Inactive Publication Date: 2019-11-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the measurement accuracy in the prior art is poor and is greatly affected by the installation conditions. A new thermal gas flowmeter is provided, which has high measurement accuracy and is less affected by the installation conditions. The advantages

Method used

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  • Thermal gas flowmeter and application thereof
  • Thermal gas flowmeter and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A thermal gas flow meter such as figure 2 As shown, including aviation plugs, circuit housings, PCB circuits, gas flow channel housings, MEMS hardware systems, and gas flow channels; such as figure 1 As shown, the MEMS hardware system includes a MEMS sensor chip, a signal processing module, an A / D conversion module, a microprocessor MCU, and a signal output module.

[0026] The MEMS chip is embedded in the inner wall of the gas flow channel and connected to the PCB circuit. The PCB circuit is placed in the circuit shell and connected to the aviation plug. The gas flow channel is a Venturi structure.

[0027] The aviation plug is used for power supply and data transmission to the PCB circuit.

[0028] The PCB circuit integrates heat source circuit, bridge circuit, signal adjustment circuit, microcontroller, communication module, etc. Realize the reading, conversion and transmission of MEMS chip data.

[0029] The MEMS sensor chip integrates a heat source unit and a t...

Embodiment 2

[0037] A thermal gas flow meter such as figure 2 As shown, including aviation plugs, circuit housings, PCB circuits, gas flow channel housings, MEMS hardware systems, and gas flow channels; such as figure 1 As shown, the MEMS hardware system includes a MEMS sensor chip, a signal processing module, an A / D conversion module, a microprocessor MCU, and a signal output module.

[0038] The MEMS chip is embedded in the inner wall of the gas flow channel and connected to the PCB circuit. The PCB circuit is placed in the circuit shell and connected to the aviation plug. The gas flow channel is a Venturi structure.

[0039] The aviation plug is used for power supply and data transmission to the PCB circuit.

[0040] The PCB circuit integrates heat source circuit, bridge circuit, signal adjustment circuit, microcontroller, communication module, etc. Realize the reading, conversion and transmission of MEMS chip data.

[0041] The MEMS sensor chip integrates a heat source unit and a t...

Embodiment 3

[0049] A thermal gas flow meter such as figure 2 As shown, including aviation plugs, circuit housings, PCB circuits, gas flow channel housings, MEMS hardware systems, and gas flow channels; such as figure 1 As shown, the MEMS hardware system includes a MEMS sensor chip, a signal processing module, an A / D conversion module, a microprocessor MCU, and a signal output module.

[0050] The MEMS chip is embedded in the inner wall of the gas flow channel and connected to the PCB circuit. The PCB circuit is placed in the circuit shell and connected to the aviation plug. The gas flow channel is a Venturi structure.

[0051] The aviation plug is used for power supply and data transmission to the PCB circuit.

[0052] The PCB circuit integrates heat source circuit, bridge circuit, signal adjustment circuit, microcontroller, communication module, etc. Realize the reading, conversion and transmission of MEMS chip data.

[0053] The MEMS sensor chip integrates a heat source unit and a t...

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Abstract

The invention relates to a thermal gas flowmeter and application thereof, and mainly solves the problem that the measuring precision is low and much influenced by the installation condition in the prior art. The thermal gas flowmeter comprises an aviation plug, a circuit casing, a PCB circuit, a gas channel casing, an MEMS hardware system and a gas channel; the MEMS hardware system comprises an MEMS sensing chip, a signal processing module, an A/D conversion module, a microprocessor MCU and a signal output module; the MEMS chip is embedded into the inner wall of the gas channel and connected with the PCB circuit; the PCB circuit is arranged in the circuit casing and connected with the aviation plug; and the gas channel is of a venturi structure. The thermal gas flowmeter and application thereof can be applied to low leakage sealing performance test.

Description

technical field [0001] The invention relates to a thermal gas flow meter and its application. Background technique [0002] Flow measurement plays an important role in the industrial production process and people's daily life. In the field of oil sales, with the promotion of oil and gas recovery equipment, the flow measurement of recovered oil and gas has become an urgent problem to be solved. Due to the small internal space of the fuel dispenser, liquid flow meters, filters, self-priming pumps, vacuum pumps and other equipment are installed, and the site conditions of the gas station are relatively harsh, the recovered gas may contain condensed oil and impurities, so the sensor is required to have a small size , Anti-clogging, not affected by vibration conditions, etc. [0003] Based on the above principles and the current flowmeter technology, thermal flowmeter, as an instrument that measures flow through heat exchange relationship, has special advantages in the field of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/68
CPCG01F1/68
Inventor 修德欣张健中王振中许光
Owner CHINA PETROLEUM & CHEM CORP
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