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Infrared SF6 sensor device relevant to NDIR (Non-Dispersive Infrared Analyzer) and method

A sensor device, infrared technology, applied in the field of infrared sensors, can solve the problems of small operating temperature range, poor moisture resistance, single customer interface, etc., to achieve the effect of wide ambient temperature range, short response time and high compatibility

Inactive Publication Date: 2015-11-18
SHANGHAI SHENWEI ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the problems of the above SF6 sensor module such as small working temperature range, poor resistance to moisture, zero drift and single customer interface, corresponding improvements have been made in structural design and circuit design, and a working temperature range is designed. NDIR infrared SF6 sensor device and method with wide range, reduced moisture interference, fast gas diffusion speed, stable performance and providing multiple customer interfaces

Method used

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  • Infrared SF6 sensor device relevant to NDIR (Non-Dispersive Infrared Analyzer) and method

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing, and the structure and principle of this device are very clear to those skilled in the art. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] The invention has a wide temperature range, can reduce moisture interference, has fast gas diffusion speed, stable performance and can provide a variety of customer interfaces NDIR infrared SF 6 sensor device. Among them, the expansion of the working temperature range depends on the selection of appropriate materials and assembly processes, and the resistance to moisture interference and the improvement of the gas diffusion speed of the sensor are achieved by optimizing the design structure; the zero drift and the diversification of customer interfaces are achieved by optimizing and improving the hardware circuit of.

[0040]...

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Abstract

The invention relates to the technical field of infrared sensors, in particular to an infrared SF6 sensor device relevant to an NDIR (Non-Dispersive Infrared Analyzer) using an infrared spectrum absorption principle and a method. The infrared SF6 sensor device comprises an optical cavity, an MEMS (Micro-Electromechanical System) light source, an infrared detector, a detector circuit board and a main circuit board, wherein the optical cavity comprises an inner light tube, a breathable film and a jacket shell; the sensor optical cavity is of a convective diffusion structure and a double-layer breathable film structure; a main circuit board circuit comprises a power supply management circuit and a sensor infrared light source driving circuit; the sensor infrared light source driving circuit adopts a constant-power driving way; the main circuit board is provided with an output interface UART, an RS-485 serial communication circuit and a 4-20mA transmitter circuit. The device adopts a convective diffusion design, so that the response time is short; the double-layer breathable film is designed with short response time, so that the moisture interference capability is enhanced; the constant-power driving circuit is adopted, and an instrument amplification form is adopted for detector signal amplification, so that the long-term stability of analogue signals of a module on hardware is enhanced; various output interfaces are provided, so that the compatibility is high.

Description

[technical field] [0001] The invention relates to the technical field of infrared sensors, in particular to a related NDIR infrared SF6 sensor device and method utilizing the principle of infrared spectrum absorption. [Background technique] [0002] With the development of today's technology, SF 6 The application fields of gas continue to expand, such as: electric power, environmental protection, metallurgy and microelectronics and many other fields. In the electric industry, SF 6 Mainly used as electrical insulation medium and arc extinguishing agent. SF 6 As an insulating medium, while ensuring the safe and reliable operation of electrical equipment, it can make the equipment miniaturized and reduce the equipment cost. At present, most high-power transformers, high-voltage circuit breakers, gas-insulated combined switchgears, and transformers use SF 6 As an insulating medium, it greatly reduces the damage caused by spark discharge and arc to the equipment. In additio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
Inventor 张永怀杨帮华陈军
Owner SHANGHAI SHENWEI ELECTRONICS TECH
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