Natural light interference resistant intelligent gas meter and gas sampling and detecting method

Abstract

The invention provides a natural light interference resistant intelligent gas meter. One surface of a sampling plate provided with components and parts is toward to a sampling character wheel, and adistance between a photoelectric detector on the sampling plate and the circumference of a sampling character wheel is not more than 1mm; the sampling character wheel is provided with numbers and a reflecting surface, the numbers comprise reference numbers and general numbers, and the reference numbers are arranged above and below the reflecting surface; the heights of the reference numbers are slightly lower than that of the general numbers. The invention further provides a gas sampling and detecting method, which comprises a light protecting and detecting step, a sampling step and a standby step. According to the gas meter provided by the invention, and the distance between the sampling plate and the sampling character wheel can be controlled and the proper color of the sampling character wheel can be selected, so that the incident dose of outside light rays can be reduced, the emission current of an optoelectronic switch tube can be reduced, and the reliability of the intelligent gas meter can be improved; furthermore, according to the gas detecting method provided by the invention, the effectiveness of the detection can be ensured by the light protecting and detecting step, and the low energy consumption of the operation can be realized by the standby step.

Description

technical field [0001] The invention relates to the field of photoelectric sampling intelligent gas meters, in particular to an intelligent gas meter capable of resisting natural light interference and a gas sampling and detection method. Background technique [0002] Most of the existing smart gas meters use a magnetoelectric conversion (ie reed switch) structure for sampling. This technology has the following disadvantages: First, it is impossible to avoid "stealing gas" in structure, and the smart gas meter can be prevented from sampling by using a magnet to attract the sampling reed switch. Some gas meters also "detect" the interference of external magnets by adding an additional dry reed switch, but the basic working principle of this magnetic protection is the same as that of the dry reed switch used for sampling, and this solution still has protection blind spots. [0003] 2. The reed switch needs to be shaped on the pins during installation, which may cause damage a...

AI Technical Summary

Problems solved by technology

This technology has the following disadvantages: 1. It is impossible to avoid "stealing gas" in the structure, and the smart gas meter can be prevented from sampling by using the magnet to attract the sampling reed switch

Some gas meters also "detect" the interference of external magnets by adding an additional dry reed switch, but the basic working principle of this magnetic protection is the same as that of the reed switch used for sampling, and this solution still has protection blind spots

[0003] 2. When installing the reed switch, the pins need to be formed, which may cause damage and make positioning difficult

However, the structure of this detector is complex, and the connection between the photoelectric encoder board and the main board is prone to failure due to poor welding and low mechanical strength of the connection.

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