CN103197352B - Multifunctional wall body detecting instrument - Google Patents

Multifunctional wall body detecting instrument Download PDF

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Publication number
CN103197352B
CN103197352B CN201310078120.9A CN201310078120A CN103197352B CN 103197352 B CN103197352 B CN 103197352B CN 201310078120 A CN201310078120 A CN 201310078120A CN 103197352 B CN103197352 B CN 103197352B
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China
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circuit
detection
receiving coil
coil
multifunctional
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CN201310078120.9A
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Chinese (zh)
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CN103197352A (en
Inventor
许贤泽
徐逢秋
乐意
李忠兵
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武汉大学
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Abstract

The invention relates to the field of building structure detection, in particular to a wall body detecting instrument. The multifunctional wall body detecting instrument includes five parts: a first part is a water pipe detection circuit, and the water pipe detection circuit is composed of a capacitive sensor used for detecting a water pipe, a monostable trigger circuit and a mean value circuit which are connected with one another in series sequentially; a second part is an electric wire detection circuit, and the electric wire detection circuit is composed of copper pour, a high-impedance amplifying circuit, an impedance conversion circuit which are connected with one another in series sequentially; a third part is a metal detection circuit, and the metal detection circuit is composed of an emission winding, a current syntonic circuit, a difference receiving coil, an amplifying circuit, a filter circuit and a biasing circuit which are connected with one another in series sequentially; a fourth part is an auxiliary circuit, and the auxiliary circuit is composed of an infrared transmitter and an infrared receiver which are connected with each other in series sequentially; and a fifth part is a control circuit which comprises a controller. The first part, the second part, the third part, the fourth part are connected with the fifth part respectively and independently. The multifunctional wall body detection is compact in size, low in manufacture cost, simple in craftsmanship, and good in manufacture repeatability.

Description

A kind of multifunctional wall body detection instrument

Technical field

The present invention relates to building structure inspection field, relate more specifically to a kind of wall detecting instrument.

Background technology

During house decoration checks, the water pipe in metope, electric wire, metal reinforcing bar often cause certain influence to construction, even accidents caused, cause personnel's property loss.If can detect before construction, find out the layout of the water pipe in metope, electric wire, metal reinforcing bar, then the generation that can effectively prevent related accidents from losing.

Current industrial control field, has special in metal, the sensor of the objects such as electric wire.Such as, in current industrial control field, in order to detect the defect of metal parts, usually use current vortex sensor, this eddy current sensor has good resolution and the linearity.But, at building field, emphasis be the investigative range of metal detection.Thus, such sensor is not suitable for the body of wall detection that finishing checks industry.Comprise the detection of other two kinds of objects: the detection of electric wire and water pipe, commercially have special sensor, but with high costs, size and precision index etc. are also short of to some extent.

Therefore, on market in the urgent need to a kind of compact dimensions, cost of manufacture is lower, manufacture craft is simple, make the good multifunctional wall body detection instrument of repeatability.

Summary of the invention

Object of the present invention overcomes the deficiencies in the prior art exactly, provides the multifunctional wall body detection instrument that a kind of compact dimensions, cost of manufacture are lower, manufacture craft is simple, making repeatability is good.

Concrete technical scheme of the present invention is: a kind of multifunctional wall body detection instrument, comprises five parts:

Part I is water pipe detection circuit, is composed in series by water gage glass capacitive transducer, single-shot trigger circuit, average circuit sequence;

Part II is electric wire detection circuit, by spy electric wire with covering copper, high impedance amplifying circuit, impedance inverter circuit sequential series form;

Part III is metal detection circuit, is made up of transmitting winding, parallel resonance circuit, differential received coil, amplifying circuit, filtering circuit, biasing circuit sequential series;

Part IV is auxiliary circuit, is made up of infrared transmitter, infrared remote receiver sequential series;

Part V is control circuit, comprises controller;

Described Part I, Part II, Part III, Part IV are independent to be respectively connected with described Part V.

As preferably, described multifunctional wall body detection instrument also comprises main body pcb board, described water gage glass capacitive transducer, described spy electric wire with covering copper, described differential received coil is integrated on described main body pcb board.

As preferably, described controller comprises water pipe detection control module, circuit detection control module, metal detection control module; Described water pipe detection control module, circuit detection control module, metal detection control module are integrated in described controller; Described Part I water pipe detection circuit with detect control module with described water pipe after described Part IV auxiliary circuit parallel connection and be connected; Described Part II electric wire detection circuit detects control module with described circuit and is connected; Described Part III metal detection circuit is connected with described metal detection control module.

As preferably, described main body pcb board comprises backboard and top board two sides, described Part I water pipe detection circuit and described Part II electric wire detection circuit are integrated on described backboard face, and described Part III metal detection circuit is integrated on described top board face.

As preferably, described water gage glass capacitive transducer comprises the first pole plate, the second pole plate, tri-electrode, the first described pole plate, the second pole plate, tri-electrode form electric capacity together, the second described pole plate is as the main pole of described electric capacity, the first described pole plate and the second described pole plate are cascaded, the secondary pole of the electric capacity described in formation.

As preferably, described differential received coil comprises the first receiving coil, the second receiving coil, the 3rd receiving coil, the 4th receiving coil and alihnment coil, the first described receiving coil, the second receiving coil, the 3rd receiving coil, the 4th receiving coil series connection, described alihnment coil is connected among the 3rd described receiving coil and the 4th described receiving coil, the first described receiving coil, the 3rd receiving coil, the 4th receiving coil are positioned on described top board face, and the second described receiving coil is positioned on described backboard face.

As preferably, described spy electric wire draws together the first copper-clad plate, the second copper-clad plate, the 3rd copper-clad plate with covering copper-clad, and the first described copper-clad plate, the second copper-clad plate, the 3rd copper-clad plate horizontal center line alignment and equidistant arrangement are on described backboard face.

As preferably, described Part I water pipe detection circuit also comprises the first reference voltage providing unit, the second reference voltage providing unit, power supply, narrow-band impulse generation circuit, described narrow-band impulse produces circuit connected in series in described single-shot trigger circuit between described average circuit, and the first reference voltage providing unit, the second reference voltage providing unit, narrow-band impulse generation circuit and average circuit that described power supply is respectively described are powered.

As preferably, described Part II electric wire detection circuit also comprises bias voltage providing unit, and described bias voltage providing unit is described high impedance amplifying circuit, impedance inverter circuit is powered.

As preferably, described transmitting winding is from coiling, comprises common enameled wire, skeleton, and described common enameled wire uniform winding is on described skeleton.

Compared with prior art, multifunctional wall body detection instrument compact dimensions of the present invention, cost of manufacture is lower, manufacture craft is simple, it is good to make repeatability.

Accompanying drawing explanation

Fig. 1: multifunctional wall body detection instrument circuit block diagram of the present invention.

Fig. 2: the layout scenarios figure of multifunctional wall body detection instrument of the present invention three kinds of sensors.

Fig. 3: multifunctional wall body detection instrument of the present invention is for measuring the circuit block diagram of capacitor plate capacitance.

Fig. 4: multifunctional wall body detection instrument of the present invention is for measuring the circuit theory diagrams of capacitor plate capacitance.

Fig. 5: the auxiliary circuit schematic diagram that multifunctional wall body detection instrument of the present invention detects for pasting wall.

Fig. 6: multifunctional wall body detection instrument of the present invention is for the treatment of the high impedance amplifying circuit block diagram of signal.

Fig. 7: multifunctional wall body detection instrument of the present invention is for the treatment of the high impedance amplifying circuit schematic diagram of signal.

Fig. 8: multifunctional wall body detection instrument transmitting coil winding schematic diagram of the present invention.

Fig. 9: multifunctional wall body detection instrument parallel resonance circuit theory diagrams of the present invention.

Figure 10: multifunctional wall body detection instrument differential received coil decomposing schematic representation of the present invention.

Figure 11: multifunctional wall body detection instrument differential received coil output signal treatment circuit block diagram of the present invention.

Figure 12: multifunctional wall body detection instrument differential received coil output signal treatment circuit schematic diagram of the present invention.

Figure 13: multifunctional wall body detection instrument water pipe locator(-ter) process flow diagram of the present invention.

Figure 14: multifunctional wall body detection instrument electric wire locator(-ter) process flow diagram of the present invention.

Figure 15: multifunctional wall body detection instrument metal detection program flow diagram of the present invention.

Embodiment

Further describe the technical program below in conjunction with reference to accompanying drawing, but this description is only for explaining the present invention, and can not limitation of the present invention be interpreted as.

Ask for an interview Fig. 1-Figure 12, a kind of multifunctional wall body detection instrument of the present invention, comprises five parts: Part I is water pipe detection circuit, is made up of water gage glass capacitive transducer 300, single-shot trigger circuit 304, average circuit 307 sequential series; Part II is electric wire detection circuit, by spy electric wire with covering copper 14, high impedance amplifying circuit 701, impedance inverter circuit 703 sequential series form; Part III is metal detection circuit, is made up of transmitting winding 100, parallel resonance circuit 110, differential received coil 9, amplifying circuit 393, filtering circuit 394, biasing circuit 395 sequential series; Part IV is auxiliary circuit, is made up of infrared transmitter 52, infrared remote receiver 53 sequential series; Part V is control circuit, comprises controller 400; Part I, Part II, Part III, Part IV are independent to be respectively connected with Part V; Controller 400 comprises water pipe detection control module, circuit detection control module, metal detection control module; Water pipe detection control module, circuit detection control module, metal detection control module are integrated in controller 400; Part I water pipe detection circuit with detect control module with water pipe after the parallel connection of Part IV auxiliary circuit and be connected; Part II electric wire detection circuit and circuit detect control module and are connected; Part III metal detection circuit is connected with metal detection control module.

A kind of multifunctional wall body detection instrument of the present invention also comprises main body pcb board 1, water gage glass capacitive transducer 4, visit electric wire with covering copper 14, differential received coil 9 is integrated on main body pcb board 1.Main body pcb board 1 comprises backboard 2 and top board 3 two sides, and Part I water pipe detection circuit and Part II electric wire detection circuit are integrated on backboard 2, and Part III metal detection circuit is integrated on 3, top board.

Water gage glass capacitive transducer 4 comprises the first pole plate 4, second pole plate 5, tri-electrode 6, first pole plate 4, second pole plate 5, tri-electrode 6 form electric capacity 301 together, second pole plate 5 is as the main pole of electric capacity 301, and the first pole plate 4 and the second pole plate 6 are cascaded, and forms the secondary pole of electric capacity 301.

Differential received coil 9 comprises the first receiving coil 8, second receiving coil 9, the 3rd receiving coil 10, the 4th receiving coil 11 and alihnment coil 12, first receiving coil 8, second receiving coil 9, the 3rd receiving coil 10, the 4th receiving coil 11 are connected, alihnment coil 12 is connected among the 3rd receiving coil 10 and the 4th receiving coil 11, first receiving coil 8, the 3rd receiving coil 10, the 4th receiving coil 11 are positioned on 3, top board, and the second receiving coil 9 is positioned on backboard 2.

Visit electric wire with cover copper 14 comprise the first copper-clad plate 13, second copper-clad plate 14, the 3rd copper-clad plate 15, first copper-clad plate 13, second copper-clad plate 14, the 3rd copper-clad plate 15 horizontal center line alignment and equidistant arrangement on backboard 2.

Part I water pipe detection circuit also comprises the first reference voltage providing unit 302, second reference voltage providing unit 303, power supply 305, narrow-band impulse generation circuit 306, narrow-band impulse produces circuit 306 and is connected on single-shot trigger circuit 304 between average circuit 307, and power supply 305 is respectively the first reference voltage providing unit 302, second reference voltage providing unit 303, narrow-band impulse produces circuit 306 and average circuit 307 is powered.

Part II electric wire detection circuit also comprises bias voltage providing unit 702, and bias voltage providing unit 702 is high impedance amplifying circuit 701, impedance inverter circuit 703 is powered.

Launching winding 100 is from coiling, and comprise common enameled wire 101, skeleton 106, common enameled wire 101 uniform winding is on skeleton 106.

A kind of multifunctional wall body detection instrument water pipe detecting function implementation procedure of the present invention is specifically set forth below in conjunction with accompanying drawing.

The design of this part refers to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, and Fig. 2 comprises capacitor plate schematic diagram, and Fig. 3, Fig. 4 are capacitor plate capacitance measurement circuit.Metering circuit is divided into the first reference voltage providing unit 302, second reference voltage providing unit 303, single-shot trigger circuit 304, and narrow-band impulse produces circuit 306, average circuit 307.All circuit units are all powered by power supply 305.

Second pole plate 5 is the main pole of electric capacity, the first pole plate the 4 and the 36 electric capacity in series secondary.Main capacitance pole plate and time capacitor plate access in multivibrator 20 respectively.Multivibrator model is HC4538, and its inside comprises two-way independently multivibrator.Primary and secondary capacitor plate and the 37 resistance 37, the 38 resistance 38 forms RC circuit.30 resistance 30, the 31 resistance 31 dividing potential drop, obtains the RC limiting voltage of main capacitance pole plate.34 resistance 34, the 35 resistance 35 dividing potential drop, forms the RC limiting voltage of time capacitor plate.The time constant of two-way RC circuit determines the dutycycle that oscillator exports pulse, therefore measures the dutycycle exporting pulse, can obtain the capacitance of capacitor plate.In addition, the built-in DAC module 36 of controller, can regulate the limiting voltage on time capacitor plate.In order to the change of measuring pad capacitance, two-way is output terminal access OR-NOT circuit 21 independently, obtains the narrow-band ping of a reaction capacitance size.In order to ensure the investigative range of instrument, controller needs regulating circuit to be operated in duty, and the 23 triode 23 can not be in saturated or cut-off state.Controller internal PID regulator.The input of regulator is the voltage signal that the built-in A/D module of controller gathers.A/D module will carry out signal sampling to the 24 output terminal 24.The output of regulator, be the magnitude of voltage that DAC module exports, this magnitude of voltage exports the 26 port 36 to, carries out the fine setting of pulse signal dutycycle.Average circuit obtains signal average by the 25 resistance 25 and bulky capacitor 26, and it has reacted the dutycycle of output pulse signal.The variable quantity of the DC level obtained is relevant with the variable quantity of electric capacity.In order to allow instrument have best sensitivity, the DC voltage value of the 24 output terminal 24 needs to be adjusted to 1/2VCC, and this voltage is the target voltage of PID controller.The clock signal of multivibrator is provided by controller built-in timer module.The output of timer module is the 29 output terminal 29, and signal frequency is 20kHz.40 electric capacity the 40, the 41 electric capacity the 41, the 42 electric capacity 42 is three decoupling capacitances, carries out filtering to power supply.

It should be noted that, before carrying out water pipe measuring ability, first judge whether instrument is in by the subsides wall testing circuit of Fig. 5 and paste wall state.Infrared-emitting diode 52, under the control of control port 55, always in running order.Due to the existence of baffle plate 58, infrared signal cannot affect infrared remote receiver 53, and output terminal the 56 port 56 of infrared remote receiver 53 is in high level.When surface of wall 54 pressed close to by instrument, infrared signal reflects through body of wall, and signal is received by infrared remote receiver 53, and output signal produces saltus step, and indicating instrument is in and pastes wall state.Now capacitive transducer is started working.

Figure 13 asked for an interview by the program circuit of water pipe detecting function.First the water pipe detecting function of instrument needs first to be chosen, and then carries out subsides wall and detects.Until instrument judges now to be in paste wall state, just start to carry out calibration procedure.The output direct current signal of calibrating sensors just stops calibration near 1/2VCC.Record the output signal of sensor this moment, and start process of measurement.When the direct current signal amplitude of output and the difference of initial time voltage amplitude exceed certain limit, water pipe near indicating instrument, is had to occur.Monitor the direct current signal exported after controller, until the difference of signal and original signal starts to decay, then indicator signal starts to carry out center instruction.By the fitting formula that controller is built-in, calculate instrument by sensor output signal and depart from the degree of center and show.In measuring process, if instrument leaves body of wall, or user selects other detecting functions, and program will empty the data of starting potential and adjustable side magnitude of voltage, waits for next measuring process.

A kind of multifunctional wall body detection instrument electric wire detecting function implementation procedure of the present invention is specifically set forth below in conjunction with accompanying drawing.

Ask for an interview Fig. 2, Fig. 6 and Fig. 7.Detect first copper-clad plate 13, second copper-clad plate the 14, three copper-clad plate 15 of using to run on one plane, three copper-clad plate equidistant arrangement, and horizontal center line alignment.Circuit design mainly comprises bias voltage providing unit 702, high impedance amplifying unit 701 and impedance transformation unit 703.

When copper-clad plate is close to electric wire, the alternating magnetic field produced because of the exchange current in electric wire forms eddy current in copper-clad plate, and now whole copper-clad plate is not an equipotentiality body, the test point in each piece of copper-clad plate is picked out, and obtains faint 50Hz signal.By the signal access high impedance amplifying circuit that copper-clad plate obtains.In Fig. 7, the 71 electric capacity 71 is capacitance, removes the DC component in signal.Deflection voltage is by the 81 resistance 81,82 resistance 82 dividing potential drop obtains, the grid of first order metal-oxide-semiconductor 73 is accessed through the 72 resistance 72, in order to ensure stable access three filter capacitors of bias voltage, 85 electric capacity the 85, the 86 electric capacity the 86, the 87 electric capacity 87 adopts 104 electric capacity, for removing signal noise.The output voltage of first order metal-oxide-semiconductor 73 exports from drain electrode.Second level metal-oxide-semiconductor 74 Main Function is impedance transformation, and enlargement factor, close to 1, is exported by source electrode port 80.First order metal-oxide-semiconductor 73 and second level metal-oxide-semiconductor 74 are integrated in same chip 75.Three cover copper polar plate is arranged side by side, and contributes to the center judging electric wire.

Figure 14 asked for an interview by the program circuit of electric wire detecting function.Instrument start enters electric wire detecting pattern later automatically.Controller gathers the output voltage of three pieces of copper-clad plates by built-in A/D module continuous print.Calculate the peak-to-peak value voltage exporting 50Hz signal.Three crest voltage are normalized.Next, program judges the relation between three Voltage Peak peak values.When difference between three signal amplitudes is more or less the same, do not carry out center instruction, only according to the average of three voltages, by the fitting formula that controller is built-in, carry out intensity instruction, namely demonstrate the distance of electric wire from instrument.When three signal amplitude differences are comparatively large, carry out center display, and the signal utilizing amplitude maximum, by built-in fitting formula, carry out intensity display.

A kind of multifunctional wall body detection instrument metal detection function implementation procedure of the present invention is specifically set forth below in conjunction with accompanying drawing.

Ask for an interview Fig. 2, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, the realization of metal detection function need to utilize launch around, 100, differential received coil 9, alihnment coil 12, and filtering circuit 394 and biasing circuit 395 complete.Launching winding 100 is from coiling, as shown in Figure 8, is formed, have certain inductance value by common enameled wire 101 uniform winding at skeleton 106.In place in circuit, select the 102 suitable electric capacity 102 can form parallel resonance circuit 110.The pumping signal 103 of this resonant circuit comes from the square-wave signal of controller timer module generation, and the frequency of square-wave signal and phase place are by programmed control.104 resistance the 104 and the 105 electric capacity 105 is smoothing to the square wave produced.

In coil, an electric current produces a magnetic field, with differential received coil 9 interlinkage, differential received coil 9 produces induced signal and exports.Because differential received coil 9 adopts difference coil to receive form, when surrounding equipment does not exist tested metal object, through the parameter designing of receiving coil, can ensure that the output signal of receiving coil is 0, now difference coil is in equilibrium state.When surrounding equipment has metal object, metal object will affect the distribution of electromagnetic field, cause the magnetic fluxes of differential received coil 9 to change, and finally cause the change of magnitude of voltage and the phase value outputed signal.

The differential received coil of the design have employed PCB coil, and differential received coil all designs on double-layer circuit board.Ask for an interview Figure 10, in order to ensure the equilibrium state of differential received coil, need design different around to coil mutually connect.Therefore, the difference coil of the design comprises following four parts: the first receiving coil group 8, second receiving coil the 9, three receiving coil the 10, four receiving coil 11.Four receiving coils are series relationship, and and launch winding maintenance with one heart.: the first receiving coil group 8 and the 4th receiving coil 11 around to being consistent, and the second receiving coil 9, the 3rd receiving coil 10 around on the contrary.Therefore, entering the appropriate design to coil, and can ensureing when not having testee, the summation of coil flux amount is zero.The design of alihnment coil 12 can ensure, at circuit board size when there is mismachining tolerance, still can reach a good equilibrium state.Alihnment coil 12 is connected between the 3rd receiving coil 10, the 4th receiving coil 11.Alihnment coil 12 moves towards identical with one heart by two, but the coil composition that radius is different.What radius was less is called inner ring 135, and what radius was larger is called outer ring 136.These two coils be divided into four sections: first paragraph 141, second segment 142, the angle of the 3rd section of the 143, four section of 144, four sections of camber lines is followed successively by 24 °, 48 °, 96 °, 192 °.By 4 pairs of metal-oxide-semiconductor switches: the above-mentioned each section of circular arc of the 3rd metal-oxide-semiconductor switch the 150, four metal-oxide-semiconductor switch the 151, five metal-oxide-semiconductor switch the 152, six metal-oxide-semiconductor switch 153 gating is that inner ring or outer ring seal in receiving coil.The difference of the receiving area that the circular arc of different radii surrounds, therefore, selects the radian access receiving coil of different angles, can change the receiving area of receiving coil.Thus the fine setting object of difference coil can be reached by the gating of metal-oxide-semiconductor, to ensure the balance of difference coil.Whether difference coil self arrives equilibrium state, will directly affect the investigative range of instrument, and therefore, in balancing coil, the design of alihnment coil is very important.

Be mixed with more noise signal in the output signal of detecting coil 390, and signal itself is very faint.For reaching the object of metal detection, the present invention devises signal processing circuit, as shown in Figure 11, Figure 12, for the treatment of output signal.Circuit is divided into the biasing circuit 395 of amplifying circuit 393, filtering circuit 394 and rear class, and amplifying circuit 393 is in-phase amplification circuit, and filtering circuit 394 is unlimited Gain filter circuit.

The first operational amplifier 391 model that amplifier section adopts is TLC2272, and the ratio of the 401 resistance the 401 and the 402 resistance 402, determines the enlargement factor of amplifier.Wave filter is unlimited gain feedback wave filter, designs based on the second operational amplifier 392, and model is TLC2272.The first operational amplifier 391 that in-phase amplifier adopts and wave filter the second operational amplifier 392 used are integrated in same chip.Amplifying circuit in-phase input end have employed LC filtering circuit, be made up of chip inductor 416 and patch capacitor 420, amplifier input resistance the 401 resistance 401 and feedback resistance the 402 resistance 402 determine signal amplification factor, and the 415 electric capacity 415 is that a small capacitances does frequency compensation.418 electric capacity 418 is for putting straight electric capacity, and the 419 resistance 419 is build-out resistor, by signal output filter.By selecting 411 resistance 411,412 resistance 412,413 electric capacity 413,414 electric capacity 414, the cutoff frequency of wave filter can be obtained.The cutoff frequency of this filtering circuit and the frequency of pumping signal are consistent, and are 5KHz.For gathering output signal, needs will increase DC component in the signal, and signal voltage is adopted in the conversion range of module 405 at AD.DC component is obtained by the 407 resistance the 407 and the 408 resistance 408 dividing potential drop.Output signal into the 404 electric capacity 404 be not with DC component, the 419 resistance the 419 and the 410 electric capacity 410 constitutes a RC low-pass filter.

In the controller the data obtained AD sampling module are processed, employing be fft algorithm, calculate output signal phase place.Because signal frequency is fixed as 5KHz, therefore fixed point fft algorithm is adopted to obtain the phase information of signal herein, then by this phase place compared with the phase place of square-wave signal, the advanced or delayed magnetic permeability reflecting testee of phase place.Because ferrous metal and non iron metal have different magnetic permeabilities, therefore can to go out object to be detected by this difference identification be ferrous metal or non iron metal.

Figure 15 asked for an interview by the program circuit that the present invention realizes metal detection, after instrument start, when user selects metal detection function, enters metal detection state.Controller sends excitation square-wave signal, makes transmitting winding be operated in parallel resonance state.Carry out AD sampling, and record the phase information of now square-wave signal.After completing sampling, mean filter is carried out to obtained data, the process of the methods such as middle finger filtering.The phase information of signal is calculated by fft algorithm module.Obtain the difference of signal phase and square wave phase and the fixed phase drift deducting circuit in the result obtains net result.Repeatedly duplicate measurements, final acquisition phase place average 208.When the absolute value of phase place average exceedes certain threshold value, retain phase information, instruction has metal object to exist.If phase place average is less than certain threshold value, then empties display information and remeasure.If there is testee, by built-in fitting formula, the roughly strength information of instruction metal object, and by the lead-lag of phase information, judge that testee belongs to ferrous metal or non iron metal.This is measured and obtains phase information compared with last time measurement result, if significantly reducing appears in phase place absolute value, carry out the center judgement of testee.Software sets center judgement symbol, utilizes the correlation parameter of phase information modifier controller built-in center fitting formula now.Following one-shot measurement, the phase information obtained directly uses strength information to show, and center shows.If during certain is measured, the phase place mean absolute value of acquisition is less than certain threshold value, exits measurement, and empties storage data, starts the measurement of another time.

The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that invention is lifted.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.

Claims (5)

1. a multifunctional wall body detection instrument, comprises five parts:
Part I is water pipe detection circuit, is made up of water gage glass capacitive transducer (300), single-shot trigger circuit (304), average circuit (307) sequential series;
Part II is electric wire detection circuit, by spy electric wire with covering copper (14), high impedance amplifying circuit (701), impedance inverter circuit (703) sequential series form;
Part III is metal detection circuit, is made up of transmitting winding (100), parallel resonance circuit (110), differential received coil (9), amplifying circuit (393), filtering circuit (394), biasing circuit (395) sequential series;
Part IV is auxiliary circuit, is made up of infrared transmitter (52), infrared remote receiver (53) sequential series;
Part V is control circuit, comprises controller (400);
Described Part I, Part II, Part III, Part IV are independent to be respectively connected with described Part V;
Described multifunctional wall body detection instrument also comprises main body pcb board (1), described water gage glass capacitive transducer (4), described spy electric wire with covering copper (14), described differential received coil (9) is integrated on described main body pcb board (1);
Described controller (400) comprises water pipe detection control module, circuit detection control module, metal detection control module; Described water pipe detection control module, circuit detection control module, metal detection control module are integrated in described controller (400); Described Part I water pipe detection circuit with detect control module with described water pipe after described Part IV auxiliary circuit parallel connection and be connected; Described Part II electric wire detection circuit detects control module with described circuit and is connected; Described Part III metal detection circuit is connected with described metal detection control module;
Described water gage glass capacitive transducer (4) comprises the first pole plate (4), the second pole plate (5), tri-electrode (6), described the first pole plate (4), the second pole plate (5), tri-electrode (6) form electric capacity (301) together, described the second pole plate (5) is as the main pole of described electric capacity (301), described the first pole plate (4) and described the second pole plate (6) are cascaded, the secondary pole of the electric capacity (301) described in formation;
Described differential received coil (9) comprises the first receiving coil (8), second receiving coil (9), 3rd receiving coil (10), 4th receiving coil (11) and alihnment coil (12), described the first receiving coil (8), second receiving coil (9), 3rd receiving coil (10), 4th receiving coil (11) series connection, described alihnment coil (12) is connected among the 3rd described receiving coil (10) and the 4th described receiving coil (11), described the first receiving coil (8), 3rd receiving coil (10), 4th receiving coil (11) is positioned on described top board (3) face, described the second receiving coil (9) is positioned on described backboard (2) face,
Described spy electric wire comprises the first copper-clad plate (13), the second copper-clad plate (14), the 3rd copper-clad plate (15) with covering copper (14), described the first copper-clad plate (13), the second copper-clad plate (14), the 3rd copper-clad plate (15) horizontal center line alignment and equidistant arrangement on described backboard (2) face.
2. multifunctional wall body detection instrument according to claim 1, it is characterized in that: described main body pcb board (1) comprises backboard (2) and top board (3) two sides, described Part I water pipe detection circuit and described Part II electric wire detection circuit are integrated on described backboard (2) face, and described Part III metal detection circuit is integrated on described top board (3) face.
3. multifunctional wall body detection instrument according to claim 1, it is characterized in that: described Part I water pipe detection circuit also comprises the first reference voltage providing unit (302), second reference voltage providing unit (303), power supply (305), narrow-band impulse produces circuit (306), described narrow-band impulse produces circuit (306) and is connected on described single-shot trigger circuit (304) between described average circuit (307), described power supply (305) is respectively the first described reference voltage providing unit (302), second reference voltage providing unit (303), narrow-band impulse produces circuit (306) and average circuit (307) power supply.
4. multifunctional wall body detection instrument according to claim 1, it is characterized in that: described Part II electric wire detection circuit also comprises bias voltage providing unit (702), described bias voltage providing unit (702) be described high impedance amplifying circuit (701), impedance inverter circuit (703) power supply.
5. multifunctional wall body detection instrument according to claim 1, it is characterized in that: described transmitting winding (100) is from coiling, comprise common enameled wire (101), skeleton (106), described common enameled wire (101) uniform winding is on described skeleton (106).
CN201310078120.9A 2013-03-12 2013-03-12 Multifunctional wall body detecting instrument CN103197352B (en)

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CN105759322A (en) * 2014-12-18 2016-07-13 贵州中建建筑科研设计院有限公司 Method for detecting ring beam or constructional column in masonry structure
CN104883819B (en) * 2015-04-29 2018-08-07 广东威创视讯科技股份有限公司 PCB silk-screen processing method and system
CN105842742A (en) * 2016-03-28 2016-08-10 大同市快安科技有限公司 Specific metal detecting device and specific metal intelligent identification learning method
CN105856188B (en) * 2016-05-06 2017-11-07 简燕梅 Portable Flexible Building Structures detect robot
CN106019384A (en) * 2016-06-20 2016-10-12 苏州华徕光电仪器有限公司 Wall body wire detection circuit
CN106990442A (en) * 2017-05-10 2017-07-28 上海海事大学 A kind of portable hand-held detection means of electric current within the walls based on electromagnetic induction

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546628A (en) * 1968-06-20 1970-12-08 Robert N Zitter Oscillating metal object detector
DE102009054950A1 (en) * 2009-12-18 2011-06-22 Hilti Aktiengesellschaft handheld instrument

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102518310B (en) * 2011-12-09 2013-11-06 葛加君 Construction method of photoelectric curtain wall of glass film

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546628A (en) * 1968-06-20 1970-12-08 Robert N Zitter Oscillating metal object detector
DE102009054950A1 (en) * 2009-12-18 2011-06-22 Hilti Aktiengesellschaft handheld instrument

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