CN2793694Y

CN2793694Y - Electric vortex non-magnetic sensor with low power consumption

Info

Publication number: CN2793694Y
Application number: CN 200520102628
Authority: CN
Inventors: 朱宝泉
Original assignee: NINGBO DONGHAI GROUP CORP Ltd
Current assignee: NINGBO DONGHAI GROUP CORP Ltd
Priority date: 2005-06-02
Filing date: 2005-06-02
Publication date: 2006-07-05
Anticipated expiration: 2015-06-02

Abstract

The utility model relates to an electric vortex non-magnetic sensor with low power consumption, which comprises an LC oscillation loop (1), a signal processing module (2) and a metal sensing sheet (3), wherein the LC oscillation circuit (1) is formed by the parallel connection of an inductor (L1) and a capacitor (C1), one end of the LC oscillation circuit (1) is connected to the (RA4) end of the signal processing module (2), and the other end of the LC oscillation circuit (1) is grounded; the (RA3) end of the signal processing module (2) is connected in series with a diode (D1), and then is connected with the (RA4) end; the metal sensing sheet (3) and the LC oscillation circuit (1) form non-contact connection. The utility model has the advantage that because a conducting wire coil with small resistance coefficient is used, and a coil frame is made of high-temperature resistant material, the utility model has the advantages of large measuring range, high sensitivity, no influence by media such as oil stain, etc., simple structure, convenient installation, non-contact measurement, etc., and solves the problem of large power consumption of the original sensor.

Description

Low-power consumption current vortex non-magnetic sensor

Technical field

The utility model relates to a kind of sensor, particularly a kind of low-power consumption current vortex non-magnetic sensor.

Background technology

Existing sensors adopts magnetic sensors such as Hall element mostly, and the non-magnetic sensor that adopts MSP430FW42X series band SCAN-IF is also arranged.The shortcoming that Magnetic Sensor is arranged: magnet adsorbs impurity easily, and magnetic adsorptive power influences stem-winder initiating flow, and magnet steel is perishable, and response frequency is low etc.The shortcoming of the non-magnetic sensor of MSP430FW42X series band SCAN-IF: the first, it can only can not be handled with the conventional one-piece machine with the single-chip microcomputer of MSP430FW42X series band SCAN-IF module, has the suspicion of monopolization; The second, MSP430FW42X series monolithic cost very high (about 30 to 40 yuans at present); The 3rd, it adopts two inductance, has increased the difficulty of producing assembling.Also have the general more greatly milliampere level of power consumption of traditional sensors, power consumption is big.

Summary of the invention

Technical problem to be solved in the utility model is that the low-power consumption current vortex non-magnetic sensor that a kind of measurement range is big, highly sensitive, be not subject to medium influences such as greasy dirt is provided at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of low-power consumption current vortex non-magnetic sensor, it is characterized in that: comprise LC concussion loop, signal processing module and metal sensing chip, described LC oscillation circuit is composed in parallel by inductance L 1 and capacitor C 1, a termination is gone into signal processing module RA4 end, other end ground connection afterwards; Insert the RA4 end behind the RA3 end serial connection diode D1 of signal processing module; The loop is contactless is connected in metal sensing chip and LC concussion.

Compared with prior art, advantage of the present utility model is, because it has adopted the little lead loop of resistance coefficient, magazine adopts exotic material, and it is big not only to have measurement range, highly sensitive, be not subjected to the influence of media such as greasy dirt, also have simple in structure, easy for installation, advantages such as non-cpntact measurement have solved the big power problems with front sensor.

Description of drawings

Fig. 1 is the structured flowchart of the utility model embodiment;

Fig. 2 is the principle of work sketch of the utility model embodiment.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, 2, a kind of low-power consumption current vortex non-magnetic sensor comprises LC concussion loop 1, signal processing module 2 and metal sensing chip 3, and described LC oscillation circuit 1 is composed in parallel by inductance L 1 and capacitor C 1, a termination is gone into the RA4 end of signal processing module 2, other end ground connection afterwards; Insert the RA4 end behind the RA3 end serial connection diode D1 of signal processing module 2; Metal sensing chip 3 and LC concussion 1 contactless connection of loop.

Principle of work of the present utility model is as follows:

As metal sensing chip 3 during near the coil of LC oscillation circuits 1, the equiva lent impedance of LC oscillation circuit 1 and resonance frequency will change along with variation inductance, make waveform damped oscillation occur when the inductance L 1 of LC oscillation circuit 1 changes.With the waveform of low-power scm record and processing damped oscillation, according to different waveform output height pulses.

Claims

1, a kind of low-power consumption current vortex non-magnetic sensor, it is characterized in that: comprise LC concussion loop (1), signal processing module (2) and metal sensing chip (3), described LC oscillation circuit (1) is composed in parallel by inductance (L1) and electric capacity (C1), a termination is gone into (RA4) end of signal processing module (2), other end ground connection afterwards; (RA4) end is inserted in (RA3) end serial connection diode (D1) back of signal processing module (2); Metal sensing chip (3) and LC concussion contactless connection of loop (1).