Automatic data acquisition device of mechanical gas meter header

Abstract

The invention relates to an automatic data acquisition device of a mechanical gas meter header, aiming at solving the defects that in the prior art, the data acquisition device structure of the meter header is complex and has unreliable counting. The invention discloses an automatic data acquisition device of a mechanical gas meter header which utilizes linkage of a mechanical contact switch and a counting code wheel to acquire data. The technical scheme is as follows: the data acquisition device of the mechanical gas meter header comprises a counting code wheel and a signal processing system, wherein the counting code wheel is provided with an involute jump wheel which rotates synchronously with the counting code wheel; the counting code wheel rotates by one circle, and the involute jumpwheel drives the mechanical contact switch to act by a transmission mechanism so as to complete primary level conversion; and the mechanical contact switch is connected with the signal processing system and inputs a level conversion signal to the signal processing system. The automatic data acquisition device can be used for automatic data acquisition of the mechanical meter header, especially data acquisition of the mechanical gas meter header.

Description

technical field [0001] The invention relates to data collection and processing technology, in particular to a mechanical gas meter head data automatic collection device. Background technique [0002] The counting principle of the mechanical gas meter head is to use the flow of gas to drive the counting wheel to rotate for counting. In order to realize automatic meter reading, it is necessary to convert the rotation of the counting digital wheel into an electrical signal. In addition to ensuring the accuracy of the data collection of the meter head, because it is a micro device embedded in the meter head, it must be compact in structure and reliable in action. Low power consumption is also an indicator that must be achieved. This is a difficult task, and many developers have made various attempts and efforts, but so far, this difficult problem has not been solved from a practical point of view. [0003] The basic structure of the mechanical gas meter head includes several (...

AI Technical Summary

Problems solved by technology

[0006] Since the current natural gas base meter generally has more than six digits (including decimal places), to complete the photoelectric conversion from analog to digital, each counting code wheel needs to be equipped with multiple light-emitting diodes corresponding to the different values ​​of the counting code wheel. Correspondingly, the sensor structure is very complex

In such a collection device, if one light-emitting diode fails, it will inevitably lead to the failure of the entire system, resulting in the unreliability of the system.

At the same time, since the photoelectric direct reading mode will drive many light-emitting diodes at the same time when reading data, even if the light-emitting diodes with ultra-low power consumption are used, the power consumption is far from the requirement of low power consumption.

[0007] The biggest disadvantage of using a magnetic sensor data acquisition device is that it is susceptible to external interference and the counting is very unreliable

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