A low power consumption processing method of Hall switch of gas meter
A technology of Hall switch and processing method, which is applied in the direction of electrical program control, program control in sequence/logic controller, instruments, etc., can solve the problem of power consumption increase, and achieve the effect of avoiding power consumption loss
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[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0014] The Hall switch module on the gas meter is similar to the function of a button. The principle is that when a magnet approaches the Hall switch, the signal output pin of the Hall switch module switches from high level to low level (or the button is pressed) . When the magnet is not in contact with the Hall switch, the signal output pin of the Hall switch module is continuously at a high level (button is not pressed). The chip judges whether a button is pressed according to the signal output pin of the Hall switch module (see figure 1 ,2)
[0015] When the Hall switch is used normally, the contact time of the magnet is limited (within 10 seconds), and the magnet will not be placed on the Hall switch for a long time. But once a user puts the magnet on the Hall switch and forgets to remove it, it will generate 2mA power consumption, and long-term ...
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