CN104898000A

CN104898000A - Duplex potentiometer total resistance and motive noise detector

Info

Publication number: CN104898000A
Application number: CN201510346483.5A
Authority: CN
Inventors: 袁静萍; 过幼男
Original assignee: Jiangsu University of Technology
Current assignee: Jiangsu University of Technology
Priority date: 2013-08-08
Filing date: 2013-08-08
Publication date: 2015-09-09
Anticipated expiration: 2033-08-08
Also published as: CN104977493B; CN104898000B; CN104898001A; CN104865482A; CN104898001B; CN104977493A; CN103424656B; CN103424656A; CN104865482B

Abstract

The invention provides a duplex potentiometer total resistance and motive noise detector comprising a first detection unit used for detecting total resistance, zero resistance and synchronization characteristics of the duplex potentiometer, a second detection unit used for detecting motive noises of the duplex potentiometer, an information integration processing unit used for controlling and processing information, a touch display used for setting parameters and displaying a detection result, an indication lamp used for indication a detection state and a buzzer, a horn used for hearing motive noises, and a constant voltage source module used for providing a constant voltage. The first and second detection units and the touch display are respectively in two-way signal electric connection with the information integration processing unit; the indication lamp and the buzzer are electrically connected with the information integration processing unit; the horn is in electrical signal connection with the second detection unit. The detector can detect the total resistance, zero resistance, synchronization and motive noise characteristics of the duplex potentiometer, is high in detection precision, convenient in usage, can effectively reduce detection cost of a duplex potentiometer production enterprise, thus improving production efficiency.

Description

Duplex potentiometer always hinders and moving noise detector

The divisional application of the application for a patent for invention of " duplex potentiometer electrical quantity comprehensive detector " that the application is application number is 201310344080.8, the applying date, to be August 8, invention and created name in 2013 be.

Technical field

The present invention relates to potentiometer checkout equipment technical field, be specifically related to a kind of duplex potentiometer and always hinder and moving noise detector.

Background technology

The manufacturing enterprise of duplex potentiometer needs the electrical quantitys such as the total resistance to duplex potentiometer, zero resistance, synchronizing characteristics and moving noise characteristic to detect in production line.At present, the electrical quantity of enterprise to duplex potentiometer detects, and mostly adopts the different electrical parameters of multiple station to duplex potentiometer to test respectively.As: first station detects total resistance and zero resistance of duplex potentiometer; Second station detects the synchronizing characteristics of duplex potentiometer with synchronizing characteristics tester; 3rd station detects the moving noise etc. of duplex potentiometer with 2 moving noise testers.There is obvious defect and deficiency in the mode that the electrical quantity of this kind to duplex potentiometer detects: one be need testing tool more, and mostly be the pointer testing tool of pure mimic channel, precision is lower; Two is that tester on each station needs duplex potentiometer to be inserted unit clamp and carries out corresponding measurement, after extract duplex potentiometer again and hand over subsequent processing to continue to detect, seriously reduce work efficiency; Three is that recruitment is many, adds larger human cost burden to enterprise.

Summary of the invention

The object of the invention is: overcome the deficiencies in the prior art, provide a kind of cost lower, easy to use directly perceived, precision is higher and total resistance of duplex potentiometer, zero resistance, synchronous and moving noise characteristic are operated to the duplex potentiometer namely all can measured by one and always hinder and moving noise detector.

Technical scheme of the present invention is: duplex potentiometer of the present invention always hinders and moving noise detector, and its design feature is: comprise the first detecting unit, the second detecting unit, informix processing unit, touch display screen, pilot lamp, hummer, power module, constant pressure source module and loudspeaker;

The first above-mentioned detecting unit is provided with first to fourth input interface end, signal input output end, first to fourth power end and the first to the 3rd constant voltage input end; Second detecting unit is provided with the first input interface end, the second input interface end, signal input output end, audible warning output terminal and the first to the 3rd power end; Informix processing unit is provided with the first detection signal communication ends, the second detection signal communication ends, man-machine interaction signal communication ends, pilot lamp control end, hummer control end and power end; Touch display screen is provided with signal communication ends and power end; Pilot lamp is provided with control signal input end and power end; Hummer is provided with control signal input end and power end; Power module is provided with power input and first to fourth power output end; Constant pressure source module is provided with power input and the first to the 3rd constant voltage output terminal; Loudspeaker are provided with signal input part;

First detection signal communication ends of informix processing unit is electrically connected with the signal input output end two-way signaling of the first detecting unit; Second detection signal communication ends of informix processing unit is electrically connected with the signal input output end two-way signaling of the second detecting unit; The signal communication ends of touch display screen is electrically connected with the man-machine interaction signal communication ends two-way signaling of informix processing unit; The control signal input end of pilot lamp is electrically connected with the pilot lamp control end signal of informix processing unit; The control signal input end of hummer is electrically connected with the hummer control end signal of informix processing unit; The signal input part of loudspeaker is electrically connected with the audible warning output terminal of the second detecting unit;

First to fourth power end of the first detecting unit is corresponding to be respectively electrically connected with first to fourth power output end of power module; First to the 3rd constant voltage input end of the first detecting unit is corresponding to be respectively electrically connected with the first to the 3rd constant voltage output terminal of constant pressure source module; First to the 3rd power end of the second detecting unit is corresponding to be respectively electrically connected with the first to the 3rd power output end of power module; The power end of the power end of informix processing unit, the power end of touch display screen, pilot lamp and the power end of hummer are all electrically connected with the first power output end of power module; The power input of constant pressure source module is electrically connected with the 4th power output end of power module;

During use, the power input of power module is electrically connected with alternating current 220V civil power; First and second input interface ends difference correspondences of the first detecting unit are electrically connected with a fixed terminals of the first potentiometer Ra of duplex potentiometer Wx to be detected and sliding end; Third and fourth input interface end difference correspondence of the first detecting unit is electrically connected with a fixed terminals of the second potentiometer Rb of duplex potentiometer Wx and sliding end; First input interface end of the second detecting unit is electrically connected with the sliding end of the first potentiometer Ra; Second input interface end of the second detecting unit and the second potentiometer Rb sliding end be electrically connected; The equal ground connection of another fixed terminals of the first potentiometer Ra and the second potentiometer Rb.

Further scheme is: the first power output end of above-mentioned power module exports+5V power supply; The second source output terminal of power module exports+12V power supply; 3rd power output end of power module exports-12V power supply; 4th power output end of power module exports+18V power supply;

First constant voltage output terminal of constant pressure source module exports+10V constant voltage; Second constant voltage output terminal of constant pressure source module 8 exports+5V constant voltage; 3rd constant voltage output terminal of constant pressure source module 8 exports+0.1V constant voltage.

Further scheme is: the first above-mentioned detecting unit comprises first detection module, the second detection module, A/D modular converter and Single-chip Controlling processing module;

Above-mentioned first detection module and the second detection module are provided with voltage measurement control signal input end, current measurement control signal input end, the first to the 3rd range control signal input part respectively, always hinder signal output part, zero resistance/stroke signal output terminal, open circuit signaling output terminal, first to fourth power end and the first to the 3rd constant voltage input end; A/D modular converter is provided with that first always hinders signal input part, the one zero resistance/stroke signal input end, second always hinders signal input part, the 20 resistance/stroke signal input end, signal communication ends, the first to the 3rd power end; Single-chip Controlling processing module is provided with voltage measurement control signal output terminal, current measurement control signal output terminal, the first to the 3rd range control signal output part, the first open circuit signaling input end, the second open circuit signaling input end, internally communication ends, correspondence with foreign country end and power end;

The voltage measurement control signal input end of first detection module voltage measurement control signal input end and the second detection module is all electrically connected with the voltage measurement control signal output end signal of Single-chip Controlling processing module; The current measurement control signal input end of first detection module current measurement control signal input end and the second detection module is all electrically connected with the current measurement control signal output end signal of Single-chip Controlling processing module; First detection module first is electrically connected to the first to the 3rd range control signal input part of the 3rd range control signal input part and the second detection module is corresponding respectively with the first to the 3rd range control signal output part signal of Single-chip Controlling processing module;

A/D modular converter first always resistance signal input part and second always resistance signal input part total resistance signal output part signal that corresponding and total resistance signal output part and second of first detection module surveys module be respectively electrically connected; One zero resistance/stroke signal input end of A/D modular converter and the 20 resistance/stroke signal input end be corresponding respectively to be hindered with zero of first detection module/and zero the hindering of stroke signal output terminal and the second detection module/stroke signal output end signal is electrically connected;

First open circuit signaling input end of Single-chip Controlling processing module and the second open circuit signaling input end are corresponding to be respectively electrically connected with the open circuit signaling output terminal of first detection module and the open circuit signaling output end signal of the second detection module; The internal communication ends of Single-chip Controlling processing module is electrically connected with the signal communication ends two-way signaling of A/D modular converter; The correspondence with foreign country end of Single-chip Controlling processing module is the signal input output end of the first above-mentioned detecting unit;

First power end of first detection module, the first power end of the second detection module, the first power end of A/D modular converter and the power end of Single-chip Controlling processing module form the first power end of the first detecting unit jointly; The second source end of the second source end of first detection module, the second source end of the second detection module and A/D modular converter forms the second source end of the first detecting unit jointly; 3rd power end of the 3rd power end of first detection module, the 3rd power end of the second detection module and A/D modular converter forms the 3rd power end of the first detecting unit jointly; 4th power end of first detection module and the 4th power end of the second detection module form the 4th power end of the first detecting unit jointly; First to the 3rd constant voltage input end of first detection module and the second detection module forms the first to the 3rd constant voltage input end of the first detecting unit jointly.

Further scheme is: above-mentioned first detection module comprises the first measurement range selection module, the first detecting pattern selector switch, the first constant voltage survey always hinders module, zero resistance/stroke module is surveyed in the first constant current and the first open circuit detection module;

First measurement range selection module is provided with the first to the 3rd range control signal input part, the first voltage signal output end, the second voltage signal output end, the first power end, second source end, constant voltage input end and constant voltage output terminal; First detecting pattern selector switch has 1 to No. 14 totally 14 wiring pin; First constant voltage is surveyed total resistance module and is provided with the first voltage signal inputs, the second voltage signal inputs, detection signal output terminal, the first power end and second source end; First constant current is surveyed zero resistance/stroke module and is provided with constant voltage input end, current output terminal, voltage signal inputs and detection signal output terminal; First open circuit detection module is provided with constant voltage input end, signal input part and signal output part;

The first voltage signal inputs that first constant voltage surveys total resistance module is electrically connected with the first voltage signal output end of the first measurement range selection module; First constant voltage surveys No. 2 wiring pin conllinear of total resistance the second voltage signal inputs of module, the second voltage signal output end of the first measurement range selection module and the first detecting pattern selector switch; A fixed terminals conllinear of No. 1 wiring pin of the first detecting pattern selector switch, No. 11 wiring pins and the first potentiometer Ra; No. 10 wiring pins of the first detecting pattern selector switch are electrically connected with the constant voltage output terminal of the first measurement range selection module; The current output terminal conllinear of zero resistance/stroke module is surveyed in No. 3 wiring pins of the first detecting pattern selector switch, No. 9 wiring pins and the first constant current; The voltage signal inputs of zero resistance/stroke module and the slip terminals conllinear of the first potentiometer Ra are surveyed in No. 4 wiring pins, No. 8 wiring pins, first constant currents of the first detecting pattern selector switch; The signal input part of the first open circuit detection module is surveyed with the first constant voltage the detection signal output terminal always hindering module and is electrically connected;

No. 12 wiring pins of the first detecting pattern selector switch and No. 13 wiring pins form the voltage measurement control signal input end of above-mentioned first detection module jointly; No. 5 wiring pins of the first detecting pattern selector switch and No. 6 wiring pins form the current measurement control signal input end of first detection module jointly; First to the 3rd range control signal input part of the first measurement range selection module is the first to the 3rd range control signal input part of first detection module; First power end of the first measurement range selection module is the first power end of first detection module; First constant voltage surveys the second source end that total the first power end hindering module is first detection module; First constant voltage surveys the 3rd power end that total second source end hindering module is first detection module; The second source end of the first measurement range selection module is the 4th power end of first detection module; The constant voltage input end of the first measurement range selection module is the first constant voltage input end of first detection module; The constant voltage input end of the first constant current survey zero resistance/stroke module is the second constant voltage input end of first detection module; The constant voltage input end of the first open circuit detection module is the 3rd constant voltage input end of first detection module; First constant voltage surveys total resistance signal output part that total detection signal output terminal hindering module is first detection module; The detection signal output terminal of the first constant current survey zero resistance/stroke module is zero resistance/stroke signal output terminal of first detection module; The signal output part of the first open circuit detection module is the open circuit signaling output terminal of first detection module.

Second detection module of the first detecting unit comprises the second measurement range selection module, the second detecting pattern selector switch, the second constant voltage survey always hinder module, zero resistance/stroke module is surveyed in the second constant current and second to open a way detection module; The function of each module of the second detection module is identical with the functions of modules of the corresponding of first detection module; The electric connection mode that each module of the second detection module is mutual and corresponding identical with first detection module with A/D modular converter and the electric connection mode of Single-chip Controlling processing module.Second detection module is electrically connected with the second potentiometer Rb when using.

Further scheme is: the first measurement range selection module of above-mentioned first detection module comprises 3 relay switches accurate reference resistance different with 3 resistances; First detecting pattern selector switch is four bilateral analog switch of CD4066 model; The core devices of Single-chip Controlling processing module is the single-chip microcomputer of STC90C54RD model.

Further scheme is: the second above-mentioned detecting unit comprises the first enlarge leadingly filtering circuit, the first mid-amplifying circuit, the first peak-detector circuit, the second enlarge leadingly filtering circuit, the second mid-amplifying circuit, the second peak-detector circuit, single-chip microcomputer treatment circuit and noise samples and power amplifier;

The first above-mentioned enlarge leadingly filtering circuit, the first mid-amplifying circuit, the first peak-detector circuit, the second enlarge leadingly filtering circuit, the second mid-amplifying circuit and the second peak-detector circuit are provided with signal input part, signal output part, the first power end and second source end respectively; Single-chip microcomputer treatment circuit is provided with the first signal input part, secondary signal input end, communication ends and power end; Noise samples and power amplifier are provided with the first signal input part, secondary signal input end, signal output part, the first power end and second source end;

The signal input part of the first enlarge leadingly filtering circuit is the first input interface end of the second above-mentioned detecting unit; The signal input part of the first mid-amplifying circuit is electrically connected with the signal output part of the first enlarge leadingly filtering circuit; The signal input part of the first peak-detector circuit is electrically connected with the signal output part of the first mid-amplifying circuit;

The signal input part of the second enlarge leadingly filtering circuit is the second input interface end of the second above-mentioned detecting unit; The signal input part of the second mid-amplifying circuit is electrically connected with the signal output part of the second enlarge leadingly filtering circuit; The signal input part of the second peak-detector circuit is electrically connected with the signal output part of the second mid-amplifying circuit;

First signal input part of single-chip microcomputer treatment circuit is electrically connected with the signal output part of the first peak-detector circuit; The secondary signal input end of single-chip microcomputer treatment circuit is electrically connected with the signal output part of the second peak-detector circuit; The communication ends of single-chip microcomputer treatment circuit is the signal input output end of the second above-mentioned detecting unit; First signal input part of noise samples and power amplifier is electrically connected with the signal output part of the first mid-amplifying circuit; The secondary signal input end of noise samples and power amplifier is electrically connected with the signal output part of the second mid-amplifying circuit; The signal output part of noise samples and power amplifier is the audible warning output terminal of the second above-mentioned detecting unit;

The power end of single-chip microcomputer treatment circuit is the first power end of the second above-mentioned detecting unit; First power end of the first enlarge leadingly filtering circuit, the first mid-amplifying circuit, the first peak-detector circuit, the second enlarge leadingly filtering circuit, the second mid-amplifying circuit, the second peak-detector circuit and noise samples and power amplifier forms the second source end of the second above-mentioned detecting unit jointly; The second source end of the first enlarge leadingly filtering circuit, the first mid-amplifying circuit, the first peak-detector circuit, the second enlarge leadingly filtering circuit, the second mid-amplifying circuit, the second peak-detector circuit and noise samples and power amplifier forms the 3rd power end of the second detecting unit jointly.

Further scheme is: the core devices of the single-chip microcomputer treatment circuit of the second above-mentioned detecting unit is the single-chip microcomputer of STC12C5410AD model.

Further scheme also has: the core devices of above-mentioned informix processing unit is the single-chip microcomputer of STC12C5A60S2 model.

The present invention has positive effect: (1) duplex potentiometer of the present invention always hinders and moving noise detector, total resistance of duplex potentiometer, zero resistance, synchronous characteristic and moving noise Characteristics Detection can be integrated, thus the checkout equipment that can effectively reduce on enterprise's production line is with artificial, significantly saves enterprise cost, improves enterprises production efficiency.(2) duplex potentiometer of the present invention always hinders and moving noise detector, by arranging touch display screen, parameter presets before can detecting easily, and associated technical parameters and curve in testing process can be shown intuitively, from the data of display and graph direct, testing staff can judge that whether index of correlation is qualified, efficient and convenient.(3) duplex potentiometer of the present invention always hinders and moving noise detector, by arranging hummer and pilot lamp, whether the duplex potentiometer index that can clearly point out testing staff to be detected is qualified, and by arranging loudspeaker, when detecting duplex potentiometer, the sound that skilled testing staff can send with the loudspeaker heard can judge that whether the moving noise index of duplex potentiometer is qualified, thus can significantly increase work efficiency.(4) duplex potentiometer of the present invention always hinders and moving noise detector, is combined with single-chip microcomputer by mimic channel, and than the checkout equipment of full mimic channel, accuracy of detection is significantly improved.

Accompanying drawing explanation

Fig. 1 is that circuit of the present invention forms schematic block diagram, also show and the detected first potentiometer Ra of duplex potentiometer Wx and the electrical connection of the second potentiometer Rb in figure;

Fig. 2 is the circuit formation schematic block diagram of the first detecting unit in Fig. 1; Also show in figure and the detected first potentiometer Ra of duplex potentiometer Wx and the electrical connection of the second potentiometer Rb;

Fig. 3 is the circuit formation schematic block diagram of the second detecting unit in Fig. 1;

Fig. 4 be the present invention of in Fig. 1, touch display screen showing for detecting time optimum configurations surface chart;

Fig. 5 be the present invention after setting parameter, start the surface chart that before detecting, its touch display screen shows;

Fig. 6 is the testing result figure after the present invention detects a kind of duplex potentiometer of model, its touch display screen shown.

Reference numeral in above-mentioned accompanying drawing is as follows:

First detecting unit 1,

First detection module 11, the first measurement range selection module 111, first detecting pattern selector switch 112, first constant voltage is surveyed the constant current of total resistance module 113, first and is surveyed zero resistance/stroke module 114, first open circuit detection module 115,

Second detection module 12, second measurement range selection module 121, second detecting pattern selector switch 122, second constant voltage is surveyed the constant current of total resistance module 123, second and is surveyed zero resistance/stroke module 124, second open circuit detection module 125,

A/D modular converter 13, Single-chip Controlling processing module 14;

Mid-amplifying circuit 22, first peak-detector circuit 23 of second detecting unit 2, first enlarge leadingly filtering circuit 21, first; Second enlarge leadingly filtering circuit 24, second mid-amplifying circuit 25, second peak-detector circuit 26; Single-chip microcomputer treatment circuit 27, noise samples and power amplifier 28;

Informix processing unit 3, touch display screen 4, pilot lamp 5, hummer 6, power module 7, constant pressure source module 8, loudspeaker 9;

Duplex potentiometer Wx, the first potentiometer Ra, the second potentiometer Rb.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.

(embodiment 1)

See Fig. 1, the duplex potentiometer of the present embodiment always hinders and moving noise detector, for the detection test of the total resistance to duplex potentiometer Wx, zeropoint resistance, moving noise and duplex potentiometer synchronizing characteristics, duplex potentiometer Wx is made up of the first coaxial potentiometer Ra and the second potentiometer Rb, and the first potentiometer Ra and the second potentiometer Rb all has 2 fixed terminals and slip terminals.

The duplex potentiometer of the present embodiment always hinders and moving noise detector, forms primarily of the first detecting unit 1, second detecting unit 2, informix processing unit 3, touch display screen 4, pilot lamp 5, hummer 6, power module 7, constant pressure source module 8 and shell.Shell does not draw in FIG.

First detecting unit 1, second detecting unit 2, informix processing unit 3, power module 7 and constant pressure source module 8 are all arranged in the enclosure; Touch display screen 4, pilot lamp 5, hummer 6 and loudspeaker 9 are all arranged on shell.

First detecting unit 1 is provided with first to fourth input interface end, signal input output end, first to fourth power end and the first to the 3rd constant voltage input end; Second detecting unit 2 is provided with the first input interface end, the second input interface end, signal input output end, audible warning output terminal and the first to the 3rd power end; Informix processing unit 3 is provided with the first detection signal communication ends, the second detection signal communication ends, man-machine interaction signal communication ends, pilot lamp control end, hummer control end and power end; Touch display screen 4 is provided with signal communication ends and power end; Pilot lamp 5 is provided with control signal input end and power end; Hummer 6 is provided with control signal input end and power end; Power module 7 is provided with power input and first to fourth power output end; Constant pressure source module 8 is provided with power input and the first to the 3rd constant voltage output terminal; Loudspeaker 9 are provided with signal input part.

When first and second input interface ends of the first detecting unit 1 use, respectively a corresponding fixed terminals with the first potentiometer Ra of duplex potentiometer Wx and sliding end are electrically connected; When third and fourth input interface end of the first detecting unit 1 uses, respectively a corresponding fixed terminals with the second potentiometer Rb of duplex potentiometer Wx and sliding end are electrically connected; First to fourth power end of the first detecting unit 1 is corresponding to be respectively electrically connected with first to fourth power output end of power module 7; First to the 3rd constant voltage input end of the first detecting unit 1 is corresponding to be respectively electrically connected with the first to the 3rd constant voltage output terminal of constant pressure source module 8.Another fixed terminals of first potentiometer Ra and the equal ground connection of another fixed terminals of the second potentiometer Rb.

First input interface end of the second detecting unit 2 is electrically connected with the sliding end of the first potentiometer Ra of duplex potentiometer Wx when using; Second input interface end of the second detecting unit 2 is electrically connected with the sliding end of the second potentiometer Rb of duplex potentiometer Wx when using; First to the 3rd power end of the second detecting unit 2 is corresponding to be respectively electrically connected with the first to the 3rd power output end of power module 7.

First detection signal communication ends of informix processing unit 3 is electrically connected with the signal input output end two-way signaling of the first detecting unit 1; Second detection signal communication ends of informix processing unit 3 is electrically connected with the signal input output end two-way signaling of the second detecting unit 2; The power end of informix processing unit 3 is electrically connected with the first power output end of power module 7.

The signal communication ends of touch display screen 4 is electrically connected with the man-machine interaction signal communication ends two-way signaling of informix processing unit 3; The power end of touch display screen 4 is electrically connected with the first power output end of power module 7.

The control signal input end of pilot lamp 5 is electrically connected with the pilot lamp control end signal of informix processing unit 3; The power end of pilot lamp 5 is electrically connected with the first power output end of power module 7.

The control signal input end of hummer 6 is electrically connected with the hummer control end signal of informix processing unit 3; The power end of hummer 6 is electrically connected with the first power output end of power module 7.

The power input of power module 7 is electrically connected with alternating current 220V civil power when using; First power output end of power module 7 exports+5V power supply; The second source output terminal of power module 7 exports+12V power supply; 3rd power output end of power module 7 exports-12V power supply; 4th power output end of power module 7 exports+18V power supply.

The power input of constant pressure source module 8 is electrically connected with the 4th power output end of power module 7; First constant voltage output terminal of constant pressure source module 8 exports+10V constant voltage; Second constant voltage output terminal of constant pressure source module 8 exports+5V constant voltage; 3rd constant voltage output terminal of constant pressure source module 8 exports+0.1V constant voltage.

The signal input part of loudspeaker 9 is electrically connected with the audible warning output terminal of the second detecting unit 2.

See Fig. 2, the first detecting unit 1 forms primarily of first detection module 11, second detection module 12, A/D modular converter 13 and Single-chip Controlling processing module 14.First detecting unit 1 hinders and synchronizing characteristics for total resistance, zero of the first potentiometer Ra and the second potentiometer Rb that detect duplex potentiometer Wx.

First detection module 11 and the second detection module 12 are provided with voltage measurement control signal input end, current measurement control signal input end, the first to the 3rd range control signal input part respectively, always hinder signal output part, zero resistance/stroke signal output terminal, open circuit signaling output terminal, first to fourth power end and the first to the 3rd constant voltage input end; A/D modular converter 13 is provided with that first always hinders signal input part, the one zero resistance/stroke signal input end, second always hinders signal input part, the 20 resistance/stroke signal input end, signal communication ends, the first to the 3rd power end; Single-chip Controlling processing module 14 is provided with voltage measurement control signal output terminal, current measurement control signal output terminal, the first to the 3rd range control signal output part, the first open circuit signaling input end, the second open circuit signaling input end, internally communication ends, correspondence with foreign country end and power end.

The voltage measurement control signal input end of first detection module 11 and the second detection module 12 is all electrically connected with the voltage measurement control signal output end signal of Single-chip Controlling processing module 14; The current measurement control signal input end of first detection module 11 and the second detection module 12 is all electrically connected with the current measurement control signal output end signal of Single-chip Controlling processing module 14; First to the 3rd range control signal input part of first detection module 11 and the second detection module 12 is corresponding to be respectively electrically connected with the first to the 3rd range control signal output part signal of Single-chip Controlling processing module 14.

A/D modular converter 13 first always resistance signal input part and second always resistance signal input part total resistance signal output part signal that corresponding and total resistance signal output part and second of first detection module 11 surveys module 12 be respectively electrically connected; One zero resistance/stroke signal input end of A/D modular converter 13 and the 20 resistance/stroke signal input end be corresponding respectively to be hindered with zero of first detection module 11/and zero the hindering of stroke signal output terminal and the second detection module 12/stroke signal output end signal is electrically connected.

First open circuit signaling input end of Single-chip Controlling processing module 14 and the second open circuit signaling input end are corresponding to be respectively electrically connected with the open circuit signaling output terminal of first detection module 11 and the open circuit signaling output end signal of the second detection module 12; The internal communication ends of Single-chip Controlling processing module 14 is electrically connected with the signal communication ends two-way signaling of A/D modular converter 13; The correspondence with foreign country end of Single-chip Controlling processing module 14 is the signal input output end of aforesaid first detecting unit 1.

The power end of the first power end of first detection module 11, the first power end of the second detection module 12, the first power end of A/D modular converter 13 and Single-chip Controlling processing module 14 forms the first power end of the first detecting unit 1 jointly ,+5V the power supply that its first power output end connecing power module 7 exports; The second source end of first detection module 11, the second source end of the second detection module 12 and the second source end of A/D modular converter 13 form the second source end of the first detecting unit 1 jointly ,+12V the power supply that its second source output terminal connecing power module 7 exports; 3rd power end of the 3rd power end of first detection module 11, the 3rd power end of the second detection module 12 and A/D modular converter 13 forms the 3rd power end of the first detecting unit 1 jointly ,-12V the power supply that its 3rd power output end connecing power module 7 exports; 4th power end of first detection module 11 and the 4th power end of the second detection module 12 form the 4th power end of the first detecting unit 1 jointly ,+18V the power supply that its 4th power output end connecing power module 7 exports; First constant voltage input end of first detection module 11 and the second detection module 12 forms the first constant voltage input end of the first detecting unit 1 jointly ,+10V the constant voltage that its first constant voltage output terminal connecing constant pressure source module 8 exports; Second constant voltage input end of first detection module 11 and the second detection module 12 forms the second constant voltage input end of the first detecting unit 1 jointly ,+5V the constant voltage that its second constant voltage output terminal connecing constant pressure source module 8 exports; 3rd constant voltage input end of first detection module 11 and the second detection module 12 forms the 3rd constant voltage input end of the first detecting unit 1 jointly ,+0.1V the constant voltage that its 3rd constant voltage output terminal connecing constant pressure source module 8 exports.

Still see Fig. 2, the first detection module 11 of the first detecting unit 1 surveys total resistance module 113, first constant current survey zero resistance/stroke module 114 primarily of the first measurement range selection module 111, first detecting pattern selector switch 112, first constant voltage and the first open circuit detection module 115 forms.

First measurement range selection module 111 is provided with the first to the 3rd range control signal input part, the first voltage signal output end, the second voltage signal output end, the first power end, second source end, constant voltage input end and constant voltage output terminal; First constant voltage is surveyed total resistance module 113 and is provided with the first voltage signal inputs, the second voltage signal inputs, detection signal output terminal, the first power end and second source end; First constant current is surveyed zero resistance/stroke module 114 and is provided with constant voltage input end, current output terminal, voltage signal inputs and detection signal output terminal; First open circuit detection module 115 is provided with constant voltage input end, signal input part and signal output part.

In first detecting pattern selector switch 112 the present embodiment, preferably employing model is four bilateral analog switch of CD4066, its enclosed inside has 4 independently analog switches, each switch has input end, output terminal and control end, and it has 1 to No. 14 totally 14 wiring pin; Wherein, No. 1, No. 2 and No. 13 pin are 3 wiring pins of an analog switch, and No. 13 pin are control pin; No. 10, No. 11 and No. 12 pin are 3 wiring pins of an analog switch, and No. 12 pin are control pin; No. 3, No. 4 and No. 5 pin are 3 wiring pins of an analog switch, and No. 5 pin are control pin; No. 6, No. 8 and No. 9 pin are 3 wiring pins of an analog switch, and No. 6 pin are control pin.

The first voltage signal inputs that first constant voltage surveys total resistance module 113 is electrically connected with the first voltage signal output end of the first measurement range selection module 111; First constant voltage surveys No. 2 wiring pin conllinear of total resistance the second voltage signal inputs of module 113, the second voltage signal output end of the first measurement range selection module 111 and the first detecting pattern selector switch 112; A fixed terminals conllinear of No. 1 wiring pin of the first detecting pattern selector switch 112, No. 11 wiring pins and the first potentiometer Ra; No. 10 wiring pins of the first detecting pattern selector switch 112 are electrically connected with the constant voltage output terminal of the first measurement range selection module 111; The current output terminal conllinear of zero resistance/stroke module 114 is surveyed in No. 3 wiring pins of the first detecting pattern selector switch 112, No. 9 wiring pins and the first constant current; The voltage signal inputs of zero resistance/stroke module 114 and the slip terminals conllinear of the first potentiometer Ra are surveyed in No. 4 wiring pins, No. 8 wiring pins, first constant currents of the first detecting pattern selector switch 112; The signal input part of the first open circuit detection module 115 is surveyed with the first constant voltage the detection signal output terminal always hindering module 113 and is electrically connected.

No. 12 wiring pins of the first detecting pattern selector switch 112 and No. 13 wiring pins form the voltage measurement control signal input end of described first detection module 11 jointly; No. 5 wiring pins of the first detecting pattern selector switch 112 and No. 6 wiring pins form the current measurement control signal input end of first detection module 11 jointly; First to the 3rd range control signal input part of the first measurement range selection module 111 is the first to the 3rd range control signal input part of first detection module 11; First power end of the first measurement range selection module 111 is the first power end (+5V) of first detection module 11; First constant voltage surveys the second source end (+12V) that total the first power end hindering module 113 is first detection module 11; First constant voltage surveys the 3rd power end (-12V) that total second source end hindering module 113 is first detection module 11; The second source end of the first measurement range selection module 111 is the 4th power end (+18V) of first detection module 11; The constant voltage input end of the first measurement range selection module 111 is the first constant voltage input end (+10V constant voltage) of first detection module 11; The constant voltage input end of the first constant current survey zero resistance/stroke module 114 is the second constant voltage input end (+5V constant voltage) of first detection module 11; The constant voltage input end of the first open circuit detection module 115 is the 3rd constant voltage input end (+0.1V constant voltage) of first detection module 11; First constant voltage surveys total resistance signal output part that total detection signal output terminal hindering module 113 is first detection module 11; The detection signal output terminal of the first constant current survey zero resistance/stroke module 114 is zero resistance/stroke signal output terminal of first detection module 11; The signal output part of the first open circuit detection module 115 is the open circuit signaling output terminal of first detection module 11.

First measurement range selection module 111 of first detection module 11 mainly comprises 3 relay switches accurate reference resistance different with 3 resistances, or claims the sampling resistor that 3 resistances are different.1 relay switch and 1 sampling resistor form a measurement range selection unit.Single-chip Controlling processing module 14 by controlling the break-make of corresponding relay switch, thus selects corresponding sampling resistor to connect with the first tested potentiometer Ra, realizes the selection of range.Single-chip Controlling processing module 14 is turned on or off by control first detecting pattern selector switch 112 detection selecting total resistance to the first potentiometer Ra, zero resistance and stroke.First constant voltage surveys total resistance module 113 by adding the constant voltage of+10 V at the first potentiometer Ra to be measured, the electric current produced flows through the sampling resistor of the first measurement range selection module 111, and the voltage on sample resistance send Single-chip Controlling processing module 14 after sending A/D modular converter 13 to change after amplification.

First constant current is surveyed zero resistance/stroke module 114 and is flow through the first potentiometer Ra to be measured by exporting 5mA steady current, and the voltage of generation send Single-chip Controlling processing module 14 again by changing through A/D modular converter 13 after amplification.

First open circuit detection module 115 is for detecting the duplex potentiometer whether having potentiometer to be detected and the present embodiment and always hinder and moving noise detector being connected.The detection signal of the first open circuit detection module 115 directly exports to Single-chip Controlling processing module 14.

Still see Fig. 2, the second detection module 12 of the first detecting unit 1 surveys total resistance module 123, second constant current survey zero resistance/stroke module 124 primarily of the second measurement range selection module 121, second detecting pattern selector switch 122, second constant voltage and the second open circuit detection module 125 forms.

The function of each module of the second detection module 12 is identical with the corresponding functions of modules of first detection module 11; The electric connection mode that each module of the second detection module 12 is mutual and corresponding identical with first detection module 11 with A/D modular converter 13 and the electric connection mode of Single-chip Controlling processing module 14.Be electrically connected with the second potentiometer Rb when second detection module 12 uses.

Single-chip Controlling processing module 14 is transferred to after the A/D modular converter 13 of the first detecting unit 1 carries out analog/digital conversion for signal first detection module 11 and the second detection module 12 transmitted.The core devices of A/D modular converter 13 is the integrated A/D converter chip of AD574 model.

The core devices of the Single-chip Controlling processing module 14 of the first detecting unit 1 is single-chip microcomputer, and in the present embodiment, the single-chip microcomputer of Single-chip Controlling processing module 14 preferably adopts model to be the single-chip microcomputer of STC90C54RD.

The synchronizing characteristics of the first potentiometer Ra of duplex potentiometer Wx that the data calculating that Single-chip Controlling processing module 14 receives A/D modular converter 13 transmission is detected and total resistance of the second potentiometer Rb and zero resistance and the first potentiometer Ra and the second potentiometer Rb:

Single-chip Controlling processing module 14 is according to formula:

(formula 1)

Calculate total resistance of the first potentiometer Ra and the second potentiometer Rb.In formula, V sampling voltage is survey total resistance module 113 or the second constant voltage by the first constant voltage survey that total resistance module 123 exports and after A/D modular converter 13 is changed, give the voltage signal of Single-chip Controlling processing module 14; R sample resistance is the resistance value of 1 in 3 sample resistances of the first measurement range selection module 111 or the second measurement range selection module 121.

Single-chip Controlling processing module 14 is according to formula:

(formula 2)

Calculate zero resistance of the first potentiometer Ra and the second potentiometer Rb.In formula, V is the voltage signal sending Single-chip Controlling processing module 14 through amplification, A/D modular converter 13 after changing again surveying that zero resistance/stroke module 114 or the second constant current survey that zero resistance/stroke module 124 exports by the first constant current.

When measuring the synchronizing characteristics of the first potentiometer Ra and the second potentiometer Rb, Single-chip Controlling processing module 14 is first according to formula:

Voltage attenuation amount (dB)= (formula 3)

Calculate the voltage attenuation amount on the first potentiometer Ra and stroke A; Voltage attenuation amount B on second potentiometer Rb namely

Stroke B, in formula, V is the voltage signal sending Single-chip Controlling processing module 14 through amplification, A/D modular converter 13 after changing again surveying that zero resistance/stroke module 114 or the second constant current survey that zero resistance/stroke module 124 exports by the first constant current, and VCC is+10V constant voltage;

Then, Single-chip Controlling processing module 14 calculates the synchronization discrepancy of the first potentiometer Ra and the second potentiometer Rb according to the following formula:

Synchronization discrepancy (dB)=stroke B-stroke A (formula 4)

The first open circuit detection module 115 that total resistance of the first potentiometer Ra calculated and the second potentiometer Rb, zero resistance and synchronization discrepancy (dB) and its receive by Single-chip Controlling processing module 14 and the detection signal that the second open circuit detection module 125 exports send to informix processing unit 3 in the lump in real time.Single-chip Controlling processing module 14 is implemented to control to select range to the first measurement range selection module 111 and the second measurement range selection module 121 according to the instruction of informix processing unit 3, implements to control to select to survey total resistance or zero resistance/stroke to the first detecting pattern selector switch 112 and the first detecting pattern selector switch 112.

The information of total resistance of the first potentiometer Ra that informix processing unit 3 real-time reception is transmitted by Single-chip Controlling processing module 14 and the second potentiometer Rb, zero resistance and synchronization discrepancy (dB), will send to touch display screen 4 to show in real time after treatment.When the first open circuit detection module 115 of the first detecting unit 1 and the second open circuit detection module 125 detect there is no potentiometer access to be detected time, after informix processing unit 3 receives this signal transmitted by Single-chip Controlling processing module 14, the duplex potentiometer of control the present embodiment always hinders and moving noise detector is in holding state.

See Fig. 1 and Fig. 3, the second detecting unit 2 is for the moving noise characteristic of the first potentiometer Ra and the second potentiometer Rb that detect duplex potentiometer Wx.

Second detecting unit 2 forms primarily of mid-amplifying circuit 25, second peak-detector circuit 26 of first enlarge leadingly filtering circuit the 21, first mid-amplifying circuit 22, first peak-detector circuit 23, second enlarge leadingly filtering circuit 24, second, single-chip microcomputer treatment circuit 27 and noise samples and power amplifier 28.

First enlarge leadingly filtering circuit 21, the first mid-amplifying circuit 25 of mid-amplifying circuit 22, first peak-detector circuit 23, second enlarge leadingly filtering circuit 23, second and the second peak-detector circuit 26 are provided with signal input part, signal output part, the first power end and second source end respectively; Single-chip microcomputer treatment circuit 27 is provided with the first signal input part, secondary signal input end, communication ends and power end; Noise samples and power amplifier 28 are provided with the first signal input part, secondary signal input end, signal output part, the first power end and second source end.

The signal input part of the first enlarge leadingly filtering circuit 21 is the first input interface end of aforesaid second detecting unit 2, is electrically connected during use with the sliding end of the first potentiometer Ra of duplex potentiometer Wx; The signal input part of the first mid-amplifying circuit 22 is electrically connected with the signal output part of the first enlarge leadingly filtering circuit 21; The signal input part of the first peak-detector circuit 23 is electrically connected with the signal output part of the first mid-amplifying circuit 22;

The signal input part of the second enlarge leadingly filtering circuit 24 is the second input interface end of aforesaid second detecting unit 2, is electrically connected during use with the sliding end of the second potentiometer Rb of duplex potentiometer Wx; The signal input part of the second mid-amplifying circuit 25 is electrically connected with the signal output part of the second enlarge leadingly filtering circuit 24; The signal input part of the second peak-detector circuit 26 is electrically connected with the signal output part of the second mid-amplifying circuit 25;

First signal input part of single-chip microcomputer treatment circuit 27 is electrically connected with the signal output part of the first peak-detector circuit 23; The secondary signal input end of single-chip microcomputer treatment circuit 27 is electrically connected with the signal output part of the second peak-detector circuit 26; The communication ends of single-chip microcomputer treatment circuit 27 is the signal input output end of aforesaid second detecting unit 2; First signal input part of noise samples and power amplifier 28 is electrically connected with the signal output part of the first mid-amplifying circuit 22; The secondary signal input end of noise samples and power amplifier 28 is electrically connected with the signal output part of the second mid-amplifying circuit 25; The signal output part of noise samples and power amplifier 28 is the audible warning output terminal of aforesaid second detecting unit 2.

The power end of single-chip microcomputer treatment circuit 27 is first power end (meeting+5V) of aforesaid second detecting unit 2; First power end of the first enlarge leadingly filtering circuit 21, first mid-amplifying circuit 25, second peak-detector circuit 26 of mid-amplifying circuit 22, first peak-detector circuit 23, second enlarge leadingly filtering circuit 24, second and noise samples and power amplifier 28 forms the second source end (meeting+12V) of aforesaid second detecting unit 2 jointly; First enlarge leadingly filtering circuit 21, first mid-amplifying circuit 25, second peak-detector circuit 26 of mid-amplifying circuit 22, first peak-detector circuit 23, second enlarge leadingly filtering circuit 24, second and noise samples and power amplifier 28 second source end jointly form the 3rd power end (meeting-12V) of aforesaid second detecting unit 2.

The core devices of single-chip microcomputer treatment circuit 27 is single-chip microcomputer, and in the present embodiment, the single-chip microcomputer of single-chip microcomputer treatment circuit 27 preferably adopts model to be the single-chip microcomputer of STC12C5410AD.Corresponding data is uploaded to informix processing unit 3 after processing the 2 road signals received by single-chip microcomputer treatment circuit 27, and the control of overall treatment unit 3 of receiving information.

Still see Fig. 1, the core devices of informix processing unit 3 is single-chip microcomputer, in the present embodiment, the single-chip microcomputer of informix processing unit 3 preferably adopts model to be the High Speed Microcontroller of STC12C5A60S2, the instruction code of this type single-chip microcomputer completely compatible traditional 8051, but the fast 8-12 of speed is doubly, there is 60K user application space, on sheet, integrated 1280 byte RAM, have EEPROM function, and the power down that conveniently can realize arranging permissible value is preserved.This type single-chip microcomputer has the full duplex serial communication interface that 2 adopt UART working method, for communicating with the real time bidirectional of the single-chip microcomputer treatment circuit 29 of the second detecting unit 2 with the Single-chip Controlling processing module 14 of the first detecting unit 1.

See Fig. 4 to Fig. 6, touch display screen 4 is for optimum configurations and information displaying.User arranges test parameter permissible value by touch display screen and is kept in the single-chip microcomputer of informix processing unit 3, and corresponding information is sent to the Single-chip Controlling processing module 14 of the first detecting unit 1 and the single-chip microcomputer treatment circuit 29 of the second detecting unit 2 by informix processing unit 3; Touch display screen 4 shows with the form of character and curve the data that informix processing unit 3 transmits simultaneously in real time.

Pilot lamp 5 is for light warning.Pilot lamp 5 is provided with 2, and wherein 1 is green light, and another is red light.Pilot lamp 5 is controlled whether to light by informix processing unit 3: after the measured data of the tested duplex potentiometer Wx received when informix processing unit 3 and preset value compare, light specification product green light; Substandard product is then put and sends out a warning and warning of glimmering.In the present embodiment, pilot lamp 5 preferably adopts LED.

Hummer 6 controls by information overall treatment unit 3, for auditory tone cues during optimum configurations, and sends different sound to underproof product when detecting and reports to the police.

Loudspeaker 9 are for showing moving noise by sound, and in testing process, by the sound that loudspeaker 9 send, skilled, experienced tester roughly can judge that the moving noise of tested duplex potentiometer Wx is whether in preset range.

The duplex potentiometer of the present embodiment always hinders and moving noise detector (aftermentioned be all called for short detector), and course of work when it uses is summarized as follows:

Detector connects 220V civil power, touch display screen 4 enter as shown in Figure 4 interface is set, each parameter value now shown be preserve in detector internal memory pre-set parameter value.User pre-sets according to the correlation parameter of tested duplex potentiometer Wx:

User, by the button below the screen of touch display screen 4, adopts the method for amendment current data, carries out optimum configurations.Concrete grammar is: first touch " set " button, there will be a cursor, again touch " set " button below the data item numeral of total resistance above screen, and this cursor can line down, when move to the most descending after, be circulated back to again the most up; As touched " displacement " button, cursor can move right, and after moving to low order end, circulation moves to high order end again; By up and down, move left and right cursor, after below the numeral that cursor pointing will be revised, touch " adding 1 " button, can revise cursor institute exponential quantity.After the complete all parameters of amendment like this, finally touch " confirmation " button, hear that hummer 6 sends a sound of " beep ", represent that the amended parameter value that pre-sets is stored into internal memory, instrument enters test mode, as shown in Figure 5, now user then can carry out test operation to the test interface that the screen of touch display screen 4 shows.

When duplex potentiometer Wx is electrically connected (in actual use with detector, the unit clamp that usual employing is electrically connected with detector carrys out grafting duplex potentiometer Wx) after, first detector is tested and on the screen of touch display screen 4, is shown the first potentiometer Ra and the second potentiometer Rb total resistance separately of duplex potentiometer Wx immediately, as two always hinder total resistance of being equal to and pre-seting or in the deviation range that total resistance allows, then hummer 6 sends a sound prompt tone of " beep ", qualified to show total resistance; If have one or two always to hinder all exceed the scope of pre-seting, then liquid crystal highlights the total resistance of display, and hummer not sounding is raw, and operating personnel can't hear sound, and namely this duplex potentiometer known always hinders defective.

Then zero resistance of duplex potentiometer Wx is tested.Rotate in the counterclockwise direction duplex potentiometer Wx to the end time, instrument is tested zeropoint resistance, on screen, " leading zero resistance " data item correspondence position occurs that the first potentiometer Ra of duplex potentiometer Wx and the second potentiometer Rb two 0 hinders measured data, zero resistance as two is all in values, then will hear the qualified prompt tone that hummer sends " beep ", qualified to show zero resistance; As have in the first potentiometer Ra of duplex potentiometer Wx and the second potentiometer Rb one defective, then there is no sound equipment.

Next carry out the first potentiometer Ra of duplex potentiometer Wx and the synchronizing characteristics of the second potentiometer Rb and moving noise to test.User only need rotate clockwise duplex potentiometer Wx to the end.In the process rotated, on the one hand: above the screen of touch display screen 4, " synchronously " and " stroke " data item correspondence position occur that the synchronization discrepancy of current actual measurement and the B of correspondence join stroke, that potentiometer turns clockwise to turn left from the right side in process and draws out " synchronizing characteristics curve " in the below of screen, the horizontal ordinate of curve is that B joins stroke, unit " dB "; Ordinate is synchronization discrepancy (B connection and A join the difference of stroke), unit " dB ".Horizontal ordinate is upper and lower two dotted lines, represent A, B two synchronization discrepancy qualified allowed band (with synchronization discrepancy allow preset value change), as draw curve between two dotted lines, it is synchronously qualified to illustrate; As exceeded the scope of dotted line limit, then represent that the trip position is synchronously overproof.Curve reflects synchronously overproof degree and overproof position intuitively.On the other hand: above screen, " moving noise " data item correspondence position occurs that A, B two links the current actual measurement maximal value of noise; User can also hear from " moving noise " that loudspeaker 9 send in the process that duplex potentiometer Wx rotates, and the size of sound can reflect the size of duplex potentiometer Wx moving noise intuitively.

When duplex potentiometer Wx is rotated clockwise to, the testing process of a duplex potentiometer all terminates, detector namely to actual measurement to all parameters carry out qualified judgement: when duplex potentiometer total resistance, zero resistance, moving noise all conforms to parameter preset permissible value with net synchronization capability, then hummer 6 sends " beep ... beep ... beep " three sound prompt tones, simultaneously, the green light flicker of pilot lamp 5, qualified to show; If any one or more parameter defective (defective data item present on the screen of touch display screen 4 highlight display), then hummer 6 not sounding, simultaneously the red light being lit flicker of pilot lamp 5, accordingly, it is whether qualified that testing staff is easy to just to distinguish product.The duplex potentiometer of a certain model tests the result data after terminating as shown in Figure 6.

Finally, extracted by duplex potentiometer, on-screen data will be removed, and can continue the detection starting next duplex potentiometer.

To sum up, the duplex potentiometer of the present embodiment always hinders and moving noise detector, total resistance of duplex potentiometer, zero resistance, synchronous characteristic and moving noise Characteristics Detection can be integrated, thus the checkout equipment that can effectively reduce on enterprise's production line is with artificial, significantly saves enterprise cost, improves enterprises production efficiency; By arranging touch display screen, the parameter presets before can detecting easily, and associated technical parameters and curve in testing process can be shown intuitively, from the data of display and graph direct, testing staff can judge that whether index of correlation is qualified, efficient and convenient; By arranging hummer and pilot lamp, whether the duplex potentiometer index that can clearly point out testing staff to be detected is qualified, improves work efficiency; By arranging loudspeaker, when detecting duplex potentiometer, the sound that skilled testing staff can send with the loudspeaker heard can judge that whether the moving noise index of duplex potentiometer is qualified, thus can significantly increase work efficiency; Combined with single-chip microcomputer by mimic channel, than the checkout equipment of full mimic channel, accuracy of detection is significantly improved.

Above embodiment is the explanation to the specific embodiment of the present invention; but not limitation of the present invention; person skilled in the relevant technique without departing from the spirit and scope of the present invention; can also make various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes all should be included into scope of patent protection of the present invention.

Claims

1. duplex potentiometer always hinders and a moving noise detector, it is characterized in that: comprise the first detecting unit (1), the second detecting unit (2), informix processing unit (3), touch display screen (4), pilot lamp (5), hummer (6), power module (7), constant pressure source module (8) and loudspeaker (9);

Described the first detecting unit (1) is provided with first to fourth input interface end, signal input output end, first to fourth power end and the first to the 3rd constant voltage input end; Second detecting unit (2) is provided with the first input interface end, the second input interface end, signal input output end, audible warning output terminal and the first to the 3rd power end; Informix processing unit (3) is provided with the first detection signal communication ends, the second detection signal communication ends, man-machine interaction signal communication ends, pilot lamp control end, hummer control end and power end; Touch display screen (4) is provided with signal communication ends and power end; Pilot lamp (5) is provided with control signal input end and power end; Hummer (6) is provided with control signal input end and power end; Power module (7) is provided with power input and first to fourth power output end; Constant pressure source module (8) is provided with power input and the first to the 3rd constant voltage output terminal; Loudspeaker (9) are provided with signal input part;

First detection signal communication ends of informix processing unit (3) is electrically connected with the signal input output end two-way signaling of the first detecting unit (1); Second detection signal communication ends of informix processing unit (3) is electrically connected with the signal input output end two-way signaling of the second detecting unit (2); The signal communication ends of touch display screen (4) is electrically connected with the man-machine interaction signal communication ends two-way signaling of informix processing unit (3); The control signal input end of pilot lamp (5) is electrically connected with the pilot lamp control end signal of informix processing unit (3); The control signal input end of hummer (6) is electrically connected with the hummer control end signal of informix processing unit (3); The signal input part of loudspeaker (9) is electrically connected with the audible warning output terminal of the second detecting unit (2);

First to fourth power end of the first detecting unit (1) is corresponding to be respectively electrically connected with first to fourth power output end of power module (7); First to the 3rd constant voltage input end of the first detecting unit (1) is corresponding to be respectively electrically connected with the first to the 3rd constant voltage output terminal of constant pressure source module (8); First to the 3rd power end of the second detecting unit (2) is corresponding to be respectively electrically connected with the first to the 3rd power output end of power module (7); The power end of informix processing unit (3), the power end of touch display screen (4), the power end of pilot lamp (5) and the power end of hummer (6) are all electrically connected with the first power output end of power module (7); The power input of constant pressure source module (8) is electrically connected with the 4th power output end of power module (7);

During use, the power input of power module (7) is electrically connected with alternating current 220V civil power; First and second input interface ends difference correspondences of the first detecting unit (1) are electrically connected with a fixed terminals of the first potentiometer Ra of duplex potentiometer Wx to be detected and sliding end; Third and fourth input interface end difference correspondence of the first detecting unit (1) is electrically connected with a fixed terminals of the second potentiometer Rb of duplex potentiometer Wx and sliding end; First input interface end of the second detecting unit (2) is electrically connected with the sliding end of the first potentiometer Ra; Second input interface end of the second detecting unit (2) and the second potentiometer Rb sliding end be electrically connected; Another fixed terminals of first potentiometer Ra and the equal ground connection of another fixed terminals of the second potentiometer Rb;

Described the first detecting unit (1) comprises first detection module (11), the second detection module (12), A/D modular converter (13) and Single-chip Controlling processing module (14);

Described first detection module (11) and the second detection module (12) are provided with voltage measurement control signal input end, current measurement control signal input end, the first to the 3rd range control signal input part respectively, always hinder signal output part, zero resistance/stroke signal output terminal, open circuit signaling output terminal, first to fourth power end and the first to the 3rd constant voltage input end; A/D modular converter (13) is provided with that first always hinders signal input part, the one zero resistance/stroke signal input end, second always hinders signal input part, the 20 resistance/stroke signal input end, signal communication ends, the first to the 3rd power end; Single-chip Controlling processing module (14) is provided with voltage measurement control signal output terminal, current measurement control signal output terminal, the first to the 3rd range control signal output part, the first open circuit signaling input end, the second open circuit signaling input end, internally communication ends, correspondence with foreign country end and power end;

The voltage measurement control signal input end of first detection module (11) voltage measurement control signal input end and the second detection module (12) is all electrically connected with the voltage measurement control signal output end signal of Single-chip Controlling processing module (14); The current measurement control signal input end of first detection module (11) current measurement control signal input end and the second detection module (12) is all electrically connected with the current measurement control signal output end signal of Single-chip Controlling processing module (14); First detection module (11) first is electrically connected to the first to the 3rd range control signal input part of the 3rd range control signal input part and the second detection module (12) is corresponding respectively with the first to the 3rd range control signal output part signal of Single-chip Controlling processing module (14);

A/D modular converter (13) first always resistance signal input part and second always resistance signal input part total resistance signal output part signal that corresponding and total resistance signal output part and second of first detection module (11) surveys module (12) be respectively electrically connected; One zero resistance/stroke signal input end of A/D modular converter (13) and the 20 resistance/stroke signal input end be corresponding respectively to be hindered with zero of first detection module (11)/and zero the hindering of stroke signal output terminal and the second detection module (12)/stroke signal output end signal is electrically connected;

First open circuit signaling input end of Single-chip Controlling processing module (14) and the second open circuit signaling input end are corresponding to be respectively electrically connected with the open circuit signaling output terminal of first detection module (11) and the open circuit signaling output end signal of the second detection module (12); The internal communication ends of Single-chip Controlling processing module (14) is electrically connected with the signal communication ends two-way signaling of A/D modular converter (13); The correspondence with foreign country end of Single-chip Controlling processing module (14) is the signal input output end of described the first detecting unit (1);

First power end of first detection module (11), the first power end of the second detection module (12), the first power end of A/D modular converter (13) and the power end of Single-chip Controlling processing module (14) form the first power end of the first detecting unit (1) jointly; The second source end of the second source end of first detection module (11), the second source end of the second detection module (12) and A/D modular converter (13) forms the second source end of the first detecting unit (1) jointly; 3rd power end of the 3rd power end of first detection module (11), the 3rd power end of the second detection module (12) and A/D modular converter (13) forms the 3rd power end of the first detecting unit (1) jointly; 4th power end of first detection module (11) and the 4th power end of the second detection module (12) form the 4th power end of the first detecting unit (1) jointly; First to the 3rd constant voltage input end of first detection module (11) and the second detection module (12) forms the first to the 3rd constant voltage input end of the first detecting unit (1) jointly;

Described the second detecting unit (2) comprises the first enlarge leadingly filtering circuit (21), the first mid-amplifying circuit (22), the first peak-detector circuit (23), the second enlarge leadingly filtering circuit (24), the second mid-amplifying circuit (25), the second peak-detector circuit (26), single-chip microcomputer treatment circuit (27) and noise samples and power amplifier (28);

The first described enlarge leadingly filtering circuit (21), the first mid-amplifying circuit (22), the first peak-detector circuit (23), the second enlarge leadingly filtering circuit (24), the second mid-amplifying circuit (25) and the second peak-detector circuit (26) are provided with signal input part, signal output part, the first power end and second source end respectively; Single-chip microcomputer treatment circuit (27) is provided with the first signal input part, secondary signal input end, communication ends and power end; Noise samples and power amplifier (28) are provided with the first signal input part, secondary signal input end, signal output part, the first power end and second source end;

The signal input part of the first enlarge leadingly filtering circuit (21) is the first input interface end of described the second detecting unit (2); The signal input part of the first mid-amplifying circuit (22) is electrically connected with the signal output part of the first enlarge leadingly filtering circuit (21); The signal input part of the first peak-detector circuit (23) is electrically connected with the signal output part of the first mid-amplifying circuit (22);

The signal input part of the second enlarge leadingly filtering circuit (24) is the second input interface end of described the second detecting unit (2); The signal input part of the second mid-amplifying circuit (25) is electrically connected with the signal output part of the second enlarge leadingly filtering circuit (24); The signal input part of the second peak-detector circuit (26) is electrically connected with the signal output part of the second mid-amplifying circuit (25);

First signal input part of single-chip microcomputer treatment circuit (27) is electrically connected with the signal output part of the first peak-detector circuit (23); The secondary signal input end of single-chip microcomputer treatment circuit (27) is electrically connected with the signal output part of the second peak-detector circuit (26); The communication ends of single-chip microcomputer treatment circuit (27) is the signal input output end of described the second detecting unit (2); First signal input part of noise samples and power amplifier (28) is electrically connected with the signal output part of the first mid-amplifying circuit (22); The secondary signal input end of noise samples and power amplifier (28) is electrically connected with the signal output part of the second mid-amplifying circuit (25); The signal output part of noise samples and power amplifier (28) is the audible warning output terminal of described the second detecting unit (2);

The power end of single-chip microcomputer treatment circuit (27) is the first power end of described the second detecting unit (2); First power end of the first enlarge leadingly filtering circuit (21), the first mid-amplifying circuit (22), the first peak-detector circuit (23), the second enlarge leadingly filtering circuit (24), the second mid-amplifying circuit (25), the second peak-detector circuit (26) and noise samples and power amplifier (28) forms the second source end of described the second detecting unit (2) jointly; The second source end of the first enlarge leadingly filtering circuit (21), the first mid-amplifying circuit (22), the first peak-detector circuit (23), the second enlarge leadingly filtering circuit (24), the second mid-amplifying circuit (25), the second peak-detector circuit (26) and noise samples and power amplifier (28) forms the 3rd power end of the second detecting unit (2) jointly.