LC sensor circuit, control method and electronic equipment
A technology of sensor circuit and micro control unit, which is applied in the field of sensors, can solve the problems that LC sensor faults cannot be detected in time, achieve the effect of shortening the working time, not being interfered by mutual inductance, and improving the sensing distance
Active Publication Date: 2021-06-11
SHENZHEN HAC TELECOM TECH
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Problems solved by technology
[0006] The main purpose of the present invention is to provide an LC sensor circuit, control method and electronic equipment, aiming to solve the technical problem that the LC sensor failure cannot be detected in time in the prior art
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[0047] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0048] refer to figure 1 , figure 1 is the first structural schematic diagram of an embodiment of the LC sensor circuit of the present invention.
[0049] An embodiment of the present invention proposes an LC sensor circuit, which is applied to the detection of metal parts, specifically for the detection of periodic motion of metal parts. The circuit includes: a micro control unit MCU, an analog switch U, an excitation unit 100, and an oscillation unit 200 and the detection unit 300; wherein, the controlled end of the analog switch U is connected to an output end of the micro control unit MCU, the output end of the analog switch U is connected to the input end of the oscillation unit 200, and the The other output end of the micro control unit MCU is connected to the input end of the excitation unit 100, one end of t...
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The invention belongs to the technical field of sensors, and discloses an LC sensor circuit, a control method and electronic equipment. The circuit is arranged below the motion area of the detected metal part, and comprises a micro-control unit which outputs a switch control signal to an analog switch so that the analog switch gates an inductor in an oscillation unit according to the switch control signal, and outputs a pulse signal to an excitation unit, and a power supply end inputs excitation current to the oscillation unit; the oscillation unit which generates an oscillation signal according to the excitation current and the tested metal part; a detection unit which generates detection signals according to the oscillation signals, wherein the micro-control unit obtains the running direction and the number of turns of the detected metal part according to the period of each detection signal and the phase difference between the detection signals. The induction distance is effectively increased through current excitation; the analog switch is used for gating the working loop, and mutual inductance influence is eliminated; the detection unit is used for converting the unsteady oscillation signal into the continuous change direct current signal so that the time required by the micro-control unit to process the signal is shortened.
Description
technical field [0001] The invention relates to the technical field of sensors, in particular to an LC sensor circuit, a control method and electronic equipment. Background technique [0002] Through the linkage of permanent magnets and magnetic induction devices, it is the most basic method in the field of civilian meters to digitize the counting signals of the mechanical operation on the dial, and to network and monitor them through the controller and wireless transceiver. Sensors that detect permanent magnets, such as dry reed switches, Hall sensors, and tunnel magnetoresistive sensors, are easily disturbed by external magnetic fields and cannot work. Solution without permanent magnets. [0003] The non-magnetic inductance solution without permanent magnets uses AC electromagnetic induction to detect the dial reading signal by coupling the magnetic field generated by the I-shaped inductance in the LC (inductance-capacitance) oscillating circuit with the metal rotating pl...
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Login to View More IPC IPC(8): G01D5/20
CPCG01D5/2006
Inventor 周杰周冠委张丽皮军李土源侯晓欢罗家帅
Owner SHENZHEN HAC TELECOM TECH