CN201138359Y

CN201138359Y - Non-contact type phase sequence detector circuit

Info

Publication number: CN201138359Y
Application number: CNU200720178934XU
Authority: CN
Inventors: 符美安
Original assignee: LUAN HAODONG
Current assignee: ETCR Electronic Technology Company
Priority date: 2007-12-27
Filing date: 2007-12-27
Publication date: 2008-10-22
Anticipated expiration: 2017-12-27

Abstract

The utility model discloses a non-contact phase sequence detector circuit which includes a power circuit, a sensing circuit, an induction circuit, an amplification circuit, a wave shaping circuit, a phase comparing circuit, a single-chip computer CPU control circuit and an LCD display circuit, and is characterized in that the induction circuit consists of the circuits of three super-induction high-insulation forceps holders R, S and T; the three output signals of the induction circuits are output to the single-chip computer CPU after the three output signals are treated by signal amplification, shaping and phase comparison by the amplification circuit, and the detected phase sequence is displayed on an LCD; the LCD display has simple and clear design; the three super-induction high-insulation forceps holders of the utility model are made of permalloy; the permalloy has very high weak magnetic field magnetic permeability, greatly improves the sensitivity and reliability of detection and induction, and has the advantages of simple, quick and safe measuring method, simple circuit design and low cost.

Description

Non-contact type phase sequence detector circuit

Technical field

The utility model relates to alternating current phase sequence detector circuit, relates in particular to non-contact type phase sequence detector circuit, belongs to the electrical instrument field.

Background technology

It is the binding post of three-phase wire must be pushed aside that existing alternating current phase sequence detects, receive 3 exposed live wires in succession and measure three exposed crocodile clips of phase-sequence meter or test chart are straight, though the traditional detection method circuit is realized simple, but to contact exposed 380V phase voltage lead when detecting, the line that also will have a power failure sometimes, energising detects again, detect inconvenient like this, both consuming time, very dangerous again, even the accident that causes casualties.

Summary of the invention

The purpose of this utility model be to provide a kind of metering system simple, fast, safety, the non-contact type phase sequence detector circuit that circuit design is simple, cost is low, adopt pincerlike noncontact to lead electrostatic detecting, need not push three-phase wire aside, need not to contact the exposed live wire of three-phase high-voltage, directly the insulation sheath of the clamp of the high insulation of three superinduction being clamped three-phase firewire respectively can detect phase sequence, really realizes safety, measures fast.

Technical matters of the present utility model reaches by following technical measures: a kind of non-contact type phase sequence detector circuit, comprise power circuit, sensor circuit, amplifying circuit, shaping circuit, phase-comparison circuit, the one-chip computer cpu control circuit, the LCD display circuit is formed, it is characterized in that: sensor circuit is by three high insulation pliers R of superinduction, S, the circuit of T is formed, three output signal ends of sensor circuit join with three input ends of amplifying circuit respectively, amplifying circuit is made up of the circuit that comprises operational amplifier, its three signal output parts join with three input ends of shaping circuit respectively, three signal output parts of shaping circuit join with the input end of phase-comparison circuit respectively, the signal input part of phase-comparison circuit signal output part and one-chip computer cpu control circuit joins, and a plurality of signal output parts of one-chip computer cpu control circuit join with the demonstration control end of LCD display circuit respectively.

The high insulation pliers R of a superinduction of the above-mentioned described sensor circuit of non-contact type phase sequence detector circuit is connected in series with resistance R 1, C1, wherein the contact of R1, C1 is a signal output part, in like manner, the high insulation pliers S of superinduction is connected in series with resistance R 3, C2, wherein the contact of R3, C2 is a signal output part, the high insulation pliers T of superinduction is connected in series with resistance R 5, C3, and wherein the contact of R5, C3 is a signal output part.Above-mentioned non-contact type phase sequence detector circuit, it is characterized in that: shaping circuit is made up of ungated integrated circuit IC4.

Two output terminal L, R of the above-mentioned described phase-comparison circuit of non-contact type phase sequence detector circuit join with 4,5 pin of one-chip computer cpu control circuit respectively.

The phase-detecting light fixture of the above-mentioned described LCD display circuit of non-contact type phase sequence detector circuit has clockwise direction to rotate Presentation Function and counterclockwise rotates Presentation Function, and, all have the indication of direction arrow and direction symbol during rotation.

Three high insulation plierses of superinduction of the above-mentioned described sensor circuit of non-contact type phase sequence detector circuit are made with the permalloy material.

The utlity model has following advantage: metering system is simple, quick, safety, the advantage that circuit design is simple, cost is low.

Description of drawings

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is a block scheme of the present utility model.

Fig. 3 is circuit theory diagrams of the present utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done further detailed being described as follows:

As Fig. 1, Fig. 2 and shown in Figure 3: a kind of non-contact type phase sequence detector circuit, comprise power circuit 1, sensor circuit 2, amplifying circuit 3, shaping circuit 4, phase-comparison circuit 5, one-chip computer cpu control circuit 6, LCD display circuit 7 is formed, sensor circuit 2 is by including three high insulation pliers R of superinduction, S, the circuit of T is formed, three output signal ends of sensor circuit 2 join with three input ends of amplifying circuit 3 respectively, amplifying circuit 3 is made up of the circuit that comprises operational amplifier, its three signal output parts join with three input ends of shaping circuit 4 respectively, 4 three signal output parts of shaping circuit join with the input end of phase-comparison circuit 5 respectively, the signal input part of phase-comparison circuit 5 signal output parts and one-chip computer cpu control circuit 6 joins, and more than 6 signal output part of one-chip computer cpu control circuit joins with the demonstration control end of LCD display circuit 7 respectively; Above-mentioned sensor circuit 2, in the utility model, be to be connected in series with resistance R 1, C1 by a high insulation pliers R of superinduction, wherein the contact of R1, C1 is a signal output part, in like manner, the high insulation pliers S of superinduction is connected in series with resistance R 3, C2, and wherein the contact of R3, C2 is a signal output part, the high insulation pliers T of superinduction is connected in series with resistance R 5, C3, and wherein the contact of R5, C3 is a signal output part; Shaping circuit 4 is made up of ungated integrated circuit IC4 etc.; In the utility model, two output terminal L, R of phase-comparison circuit 5 join with 4,5 pin of one-chip computer cpu control circuit 6 respectively; In the utility model, the phase-detecting light fixture of LCD display circuit 7 has clockwise direction to rotate Presentation Function and counterclockwise rotates Presentation Function, and, all have the indication of direction arrow and direction symbol during rotation; Three high insulation plierses of superinduction of the present utility model are made with the permalloy material, and permalloy has very high low-intensity magnetic field magnetoconductivity, have improved the sensitivity and the reliability that detect induction greatly.

Principle of work of the present utility model is such: power supply is by the alkaline dry battery power supply of 2 joint 1.5V, when pressing microswitch ON, switching tube Q1 base voltage drags down, C utmost point output power supply, CPU gets electric work, high signal of its 6th pin output makes triode Q2 conducting, keeps the Q1 conducting, and promptly detector is in open state; The LCD backlight is bright simultaneously, CPU the 15th pin output pulse signal, the T5 flicker of LCD, indicating instrument work.When pressing microswitch OFF, CPU the 6th pin signal drags down, and Q2 ends, Q1 base voltage high state, and Q1 closes, the instrument shutdown.After start work, about 5 minutes instrument of CPU timing are shut down automatically.The utlity model has simple and easy inspection electric work energy: with arbitrary induction clamp near or clamp measured lead, if wire voltage is in AC50～600V scope, the L1 of LCD or L3 can bright lamps.Positive phase time, the signal of clamp R, S, T induction is given CPU by IC8-2 the 3rd pin after amplification, shaping, comparison.The T3-T4-T6-T7-T8 of CPU control LCD moves in the direction of the clock, and " R " symbol of LCD shows simultaneously, and hummer sends intermittently short ring sound; When anti-phase, the signal of clamp R, S, T induction is given CPU by IC8-1 the 6th pin after amplification, shaping, comparison.The T7-T6-T4-T3-T2 of CPU control LCD is by counterclockwise rotating, and " L " symbol of LCD shows simultaneously, and hummer sends continuous yowl sound.The utility model also has the live wire measuring ability except that having the phase sequence measuring ability.The utlity model has metering system simple, fast, safety, the advantage that circuit design is simple, cost is low has vast market prospect.

Claims

1, a kind of non-contact type phase sequence detector circuit, comprise power circuit (1), sensor circuit (2), amplifying circuit (3), shaping circuit (4), phase-comparison circuit (5), one-chip computer cpu control circuit (6), LCD display circuit (7) is formed, it is characterized in that: sensor circuit (2) is by three high insulation pliers R of superinduction, S, the circuit of T is formed, three output signal ends of sensor circuit (2) join with three input ends of amplifying circuit (3) respectively, amplifying circuit (3) is made up of the circuit that comprises operational amplifier, its three signal output parts join with three input ends of shaping circuit (4) respectively, (4) three signal output parts of shaping circuit join with the input end of phase-comparison circuit (5) respectively, the signal input part of phase-comparison circuit (5) signal output part and one-chip computer cpu control circuit (6) joins, and a plurality of signal output parts of one-chip computer cpu control circuit (6) join with the demonstration control end of LCD display circuit (7) respectively.

2, non-contact type phase sequence detector circuit according to claim 1, it is characterized in that: the high insulation pliers R of a superinduction of sensor circuit (2) is connected in series with resistance R 1, C1, wherein the contact of R1, C1 is a signal output part, in like manner, the high insulation pliers S of superinduction is connected in series with resistance R 3, C2, wherein the contact of R3, C2 is a signal output part, and the high insulation pliers T of superinduction is connected in series with resistance R 5, C3, and wherein the contact of R5, C3 is a signal output part.

3, non-contact type phase sequence detector circuit according to claim 1, it is characterized in that: shaping circuit (4) is made up of not circuit IC4.

4, non-contact type phase sequence detector circuit according to claim 1 is characterized in that: two output terminal L, R of phase-comparison circuit (5) join with 4,5 pin of one-chip computer cpu control circuit (6) respectively.

5, non-contact type phase sequence detector circuit according to claim 1, it is characterized in that: the phase-detecting light fixture of LCD display circuit (7) has clockwise direction to rotate Presentation Function and counterclockwise rotates Presentation Function, and, all have the indication of direction arrow and direction symbol during rotation.

6, non-contact type phase sequence detector circuit according to claim 1 is characterized in that: three high insulation plierses of superinduction of sensor circuit (2) are made with the permalloy material.