Corrosion-resistant gas meter temperature and pressure compensation integrated sensor and manufacturing method thereof

Abstract

The invention relates to a corrosion-resistant gas meter temperature and pressure compensation integrated sensor and a manufacturing method thereof, wherein the sensor adopts a small integrated SMD structure, and comprises a frame, a cylindrical shell, a signal conditioning chip, a pressure sensor and a platinum resistance temperature sensor. The cylindrical shell is arranged on the frame, the signal conditioning chip, the pressure sensor and the platinum resistance temperature sensor are bonded on the frame and are encapsulated in the cylindrical shell by a potting glue; the signal conditioning chip, the pressure sensor and the platinum resistance temperature sensor are electrically connected through alignment bonding wire; and the potting glue is a fluorine-containing gel. After the calibration compensation of the corrosion-resistant gas meter temperature and pressure compensation integrated sensor is finished, a digital pressure signal output and a platinum resistance signal temperature output are provided, thereby satisfying the requirements of the 'Gas Meter Verification Regulations' on the use of gas meter temperature and pressure compensation, solving users' demand for miniaturized products and reserves more space for users to innovate and upgrade.

Description

technical field [0001] The invention relates to the technical field of gas meter temperature and pressure compensation, in particular to a corrosion-resistant gas meter temperature and pressure compensation integrated sensor and a manufacturing method thereof. Background technique [0002] The gas meter is used for gas metering and billing. The calculation is based on the standard conditions. Except for the laboratory, the actual working conditions rarely meet the conditions of use under the standard conditions. According to the gas state equation, the gas metering is greatly affected by the ambient temperature and pressure. Large, in order to ensure the accuracy of gas metering, it is necessary to measure the temperature and pressure of natural gas in the natural gas pipeline, and convert the actual working conditions into standard working conditions through temperature and pressure compensation to realize the correction of the gas meter measurement value. [0003] There ar...

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Problems solved by technology

[0003] There are two methods of temperature and pressure compensation for existing gas meters. One is to use a split structure, which uses a platinum resistance temperature sensor to measure temperature and an oil-filled isolation membrane pressure sensor to measure pressure for temperature and pressure compensation. The disadvantage of this structure is the volume Large, space-consuming, and complex structure; the other is a sensor that uses temperature and pressure integration. The temperature sensor uses a semiconductor PN junction for temperature measurement and is protected by silicone gel potting. The temperature measurement accuracy of the semiconductor PN junction is not high and cannot meet the requirements. The temperature index requirements of the "Gas Meter Verification Regulations"; there are organic solvents and sulfides in natural gas pipelines, and silicone gel cannot meet the anti-corrosion requirements

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