Inductive proximity sensor analog inductance output circuit

Abstract

The present invention discloses an inductive proximity sensor analog inductance output circuit, and aims to provide an analog inductance output circuit which is high in reliability and stable in performance, and enables the faults to be reduced. The inductive proximity sensor analog inductance output circuit of the present invention is realized by the following technical scheme that a series connection point of an inductance coil L1 and an inductance coil L2 is electrically connected with a normally open contact 5 of a relay K1, the other end of the inductance coil L2 is connected with a common end contact 3 of a relay via a normally-closed contact 4 of the relay K1, the common end contact 3 is electrically connected with the positive end L_HI of an analog inductance circuit output end, and the other end of the inductance coil L1 is electrically connected with the negative end L_LO of the analog inductance circuit output end, thereby forming an inductance switching gating switch circuit; the inductance switching gating switch circuit gates the inductance coil L1 of 4.8 mH, or gates the inductance coil L1 of 4.8 mH and the inductance coil L2 of 1 mH which are connected in series, and selects to output a 4.8 mH or 5.8 mH inductance value as an analog inductance value to output to a corresponding detection unit.

Description

technical field [0001] The invention relates to an inductive proximity sensor with analog output widely used in industries such as textiles, chemical fibers, machine tools, machinery, metallurgy, locomotives and automobiles, and aviation. Inductive proximity sensors are mainly used for displacement measurement and mechanical quantities (such as force, tension, pressure, differential pressure, acceleration, vibration, strain, flow, thickness, liquid level, specific gravity, torque, etc.) that can be converted into displacement changes. . Especially inductive proximity sensors for analog inductive output technology. Background technique [0002] The inductance sensor is a device that converts the measured value into a change in the self-inductance or mutual inductance of the coil for measurement, and is a device that converts the measured value into a change in the self-inductance or mutual inductance of the coil for measurement. The inductance sensor can also be used as a m...

AI Technical Summary

Problems solved by technology

This line has the following disadvantages in precision measurement: the linear working range is narrow; there is an initial current when there is no input, so the requirement of zero output at zero input cannot be achieved, and the magnetic field generated by the exciting current causes additional displacement of the armature, which will cause measurement error

The test of the position detection and retractable control unit needs to give the inductance value. There are two methods usually used, one is connected to the real inductive proximity sensor, and the other is connected to the inductance value of the simulated inductive proximity sensor. The latter method is also a commonly used method, which can realize low-cost multi-channel inductance input. In the realized circuit, the selection of 4.8mH or 5.8mH is completed, but the existing technology can achieve 4.8mH in actual use. Or the setting of 5.8mH is obtained by connecting the two basic coils 4.8mH and 1mH in series, and short-circuiting the 1mH coil through the relay. It will cause a delay in the change of the inductance value, and there are often faults such as circuit damage and inductance value switching data delay

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