Meter, and photoelectric sampling device and the photoelectric sampling method of same

Abstract

The invention discloses a meter and a photoelectric sampling device and a photoelectric sampling method of the meter, which belong to the technical field of flow measurement, and solve the problem oflight interference caused by the fact that an existing meter adopts reflection type optical signal sampling. The photoelectric sampling device of the meter comprises a light emitter, a light receiverand a rotary disc, wherein the light receiver and the light emitter are oppositely arranged, and a light correlation region is formed between the light receiver and the light emitter; and the rotary disc is driven by means of a base meter of the meter to rotate, a shading part and a light-transmitting part are arranged on the rotary disc, and the shading part and the light-transmitting part alternately pass through the light correlation region through the rotating motion of the rotary disc. According to the photoelectric sampling device and the photoelectric sampling method, correlation optical signal sampling is carried out, the problem that light is easily interfered by external light in reflection-type optical signal sampling is solved, the identification difficulty of sampled signals is reduced, and the manufacturing process requirement and the assembly requirement of product parts are reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of flow metering, in particular to a photoelectric sampling device for a meter, a photoelectric sampling method and a meter. 【Background technique】 [0002] With the rapid development of smart meters, the industry has higher requirements for the accuracy and high performance of meter measurement. The sampling and metering methods of gas meters mainly include magnetic signal sampling and metering and optical signal sampling and metering. Although the magnetic signal sampling and metering technology is simple in design and low in power consumption, it is susceptible to magnetic field interference, resulting in a decrease in sampling accuracy and inaccurate measurement results. , the applicable occasions are limited. In contrast, although the optical signal sampling measurement is not interfered by the external magnetic field, it also has technical defects. Recognition, but high installation accuracy and co...

AI Technical Summary

Problems solved by technology

The sampling and metering methods of gas meters mainly include magnetic signal sampling and metering and optical signal sampling and metering. Although the magnetic signal sampling and metering technology is simple in design and low in power consumption, it is susceptible to magnetic field interference, resulting in a decrease in sampling accuracy and inaccurate measurement results. , with limited application

In contrast, although the optical signal sampling measurement is not interfered by the external magnetic field, it also has technical defects. Recognition, but requires high installation accuracy and complex software algorithms to ensure the accuracy of optical signal sampling. At the same time, the aging of the reflective surface will affect the light reflection effect and affect the sampling data. As a result, this algorithm may exist after the reflective surface ages. The risk of sampling data loss; in practical applications, there will be astigmatism or external light interference, which will cause the difference of optical signals to become smaller, easily cause misjudgment, and the reliability of measurement is not high. If you want to add an anti-light interference structure to solve the above problem, it will complicate the structure and increase the cost of parts

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