CN103837727B - The system of selection of self-balancing bridge circuit gear and device - Google Patents
The system of selection of self-balancing bridge circuit gear and device Download PDFInfo
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- CN103837727B CN103837727B CN201210490540.3A CN201210490540A CN103837727B CN 103837727 B CN103837727 B CN 103837727B CN 201210490540 A CN201210490540 A CN 201210490540A CN 103837727 B CN103837727 B CN 103837727B
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Abstract
A kind of self-balancing bridge circuit gear selecting arrangement, is made up of a test signal source, testing component, operational amplifier, gear selected cell, comparator and system Operations Analysis. Receive the test signal of test signal source output and produce electric current to be measured by testing component and enter gear selected cell via imaginary point, and operational amplifier can receive reference voltage and imaginary point voltage and export gear voltage to gear selected cell, form feedback path to imaginary point by gear selected cell, and then formation imaginary point voltage, by comparator, imaginary point voltage and default voltage are compared and export driving signal again, now system Operations Analysis can carry out gear shift action according to driving signal to order about gear selected cell, and then realizes the function of acceleration shifting.
Description
Technical field
The invention relates to a kind of measure selecting arrangement and system of selection thereof, particularly the relevant self-balancing bridge circuit that utilizesGear selecting arrangement and system of selection thereof.
Background technology
Current various ammeter all can by measure result for example: resistance value, capacitance or circuit pathways test etc., with mouldPlan or digital form show its measuring value. And being generally rotating disk or the button of changing by gear, above-mentioned functions switches,User must judge also selected amount brake voluntarily, then with extremely corresponding measurement gear of manual switchover.
But, because of the function of ammeter numerous, for one for electrically and unfamiliar user, the process measuringIn, possibly cannot correctly switch to corresponding measurement gear, or user causes the mistake measuring, example because a period of time is carelessAs: use the determinand of small resistor value but to select large gear to measure, except meeting causes measurement result to some extent deviation, alsoThe risk that likely causes ammeter to damage. Therefore measure ammeter auto-shifting device and can be described as indispensable part, at presentHad known ammeter to increase and automatically selected gear device, as U.S. Patent number the 4196475th discloses, this patent discloses oneKind utilize self-balancing bridge circuit to measure impedance method, but the gear of this invention select to be undertaken by outside, and without fast automaticThe mechanism of trip stop, therefore also cannot be covered by balanced bridge completely carries out gear technology to this gear selection function automatically.
Summary of the invention
The object of the present invention is to provide the system of selection of a kind of self-balancing bridge circuit gear and device, measurement mechanism can thusAcceleration gear selects to reach the object of rapid measuring testing component, to increase the flexibility ratio of ammeter application.
For achieving the above object, self-balancing bridge circuit gear selecting arrangement provided by the invention, comprising:
One test signal source, in order to export a test signal;
One testing component, has an input and an output, and wherein this input is electrically connected at this test signal sourceIn order to receive this test signal, and this test signal is a voltage (V to be measuredDut)；
One operational amplifier, has a positive input terminal, a negative input end and an output, and wherein this positive input terminal is in order to connectReceive a reference voltage (VRef), this negative input end is connected with this output of this testing component, and this output is in order to export one gradePosition voltage (VRr)；
One gear selected cell, has a first end, one second end and one the 3rd end, and wherein this first end is electrically connected atThis output of this operational amplifier, in order to receive this gear voltage (VRr), it is defeated that this second end is coupled to this of this testing componentGo out the contact between end and this negative input end of this operational amplifier, and export an imaginary point voltage (VG)；
One comparator, has a positive input terminal, a negative input end and an output, and wherein this positive input terminal is in order to receive oneDefault voltage, this negative input end is coupled to connecing between this output of this testing component and this negative input end of this operational amplifierPoint, and receive this imaginary point voltage (V from this gear selection unitG), wherein this comparator is in order to this imaginary point voltage relatively(VG) and this default voltage, and drive signal by this output output one; And
One system Operations Analysis, has a first end and one second end, and wherein this first end is coupled to this gear choosingSelect the 3rd end of unit, this second termination is received this driving signal of exporting from this comparator, wherein this system computing controlUnit processed via this driving signal of computing after, produce a gear shift signal, and export this gear selected cell to via this first end,Order about this gear selected cell and carry out a gear shift action, and by this gear shift action make this gear selected cell produce one with to be measured groupThe gear that part conforms to.
Described self-balancing bridge circuit gear selecting arrangement, wherein, this gear selected cell includes a plurality of gear modelsEnclose.
Self-balancing bridge circuit gear provided by the invention system of selection, comprising:
(1) provide a test signal source, in order to export a test signal;
(2) provide a testing component, it has an input and an output, and wherein this input is electrically connected at thisTest signal source is in order to receive this test signal, and this test signal is a voltage (V to be measuredDut)；
(3) provide an operational amplifier, there is a positive input terminal and receive a reference voltage (VRef), one negative input end receiveThis imaginary point voltage (VG), and export a gear voltage (V by outputRr)；
(4) provide a gear selected cell, receive this gear voltage (VRr) and export an imaginary point voltage (VG)；
(5) carry out a comparison program, utilize a comparator to judge this imaginary point voltage (VG) with the relatively knot of a default voltageWhether fruit reaches balance, if while reaching balance, skips back to step (1), if while not reaching balance, exports a driving signal and goes forward side by sideRow step (6);
(6) carry out an operation program, utilize a system Operations Analysis to receive this driving signal, and produce gear shift newsNumber; And
(7) carry out a shift procedure, produce a gear shift action according to this gear shift signal, and make this gear by this gear shift actionSelected cell produces a gear conforming to this testing component, and skips back to step (1).
Described self-balancing bridge circuit gear system of selection, wherein, this gear selected cell includes a plurality of gear modelsEnclose.
Self-balancing bridge circuit gear selecting arrangement provided by the invention, also comprises:
One test signal source, in order to export a test signal;
One testing component, has an input and an output, and wherein this input is electrically connected at this test signal sourceIn order to receive this test signal, and this test signal is a voltage (V to be measuredDut)；
One operational amplifier, has a positive input terminal, a negative input end and an output, and wherein this positive input terminal is in order to connectReceive a reference voltage (VRef), this negative input end is connected with this output of this testing component, and this output is in order to export one gradePosition voltage (VRr)；
One gear selected cell, has a first end, one second end and one the 3rd end, and wherein this first end is electrically connected atThis output of this operational amplifier, in order to receive this gear voltage (VRr), it is defeated that this second end is coupled to this of this testing componentGo out the contact between end and this negative input end of this operational amplifier, and export an imaginary point voltage (VG)；
One comparator, has a positive input terminal, a negative input end and an output, and wherein this negative input end is in order to receive oneDefault voltage, this positive input terminal is coupled between this output of this operational amplifier and this first end of this gear selected cellContact, and receive this gear voltage (V from this operational amplifierRr), wherein this comparator is in order to this gear voltage relatively(VRr) and this default voltage, and drive signal by this output output one; And
One system Operations Analysis, has a first end and one second end, and wherein this first end is coupled to this gear choosingSelect the 3rd end of unit, this second termination is received this driving signal of exporting from this comparator, wherein this system computing controlUnit processed via this driving signal of computing after, produce a gear shift signal, and export this gear selection unit to via this first end,Order about this gear selected cell and carry out a gear shift action, and make this gear selected cell generation one to be measured with this by this gear shift actionThe gear that assembly conforms to.
Described self-balancing bridge circuit gear selecting arrangement, wherein, this gear selected cell includes a plurality of gear modelsEnclose.
Self-balancing bridge circuit gear provided by the invention system of selection, also comprises:
(1) provide a test signal source, in order to export a test signal;
(2) provide a testing component, it has an input and an output, and wherein this input is electrically connected at thisTest signal source is in order to receive this test signal, and this test signal is a voltage (V to be measuredDut)；
(3), according to an operational amplifier, there is a positive input terminal and receive a reference voltage (VRef), one negative input end receiveThis imaginary point voltage (VG), and export a gear voltage (V by an outputRr)；
(4) provide a gear selected cell, receive this gear voltage (VRr) and export this imaginary point voltage (VG)；
(5) carry out a comparison program, utilize a comparator to judge this gear voltage (VRr) with the relatively knot of a default voltageWhether fruit reaches balance, if while reaching balance, skips back to step (1), if while not reaching balance, exports a driving signal and goes forward side by sideRow step (6);
(6) carry out an operation program, utilize a system Operations Analysis to receive and drive signal, and produce gear shift newsNumber; And
(7) carry out a shift procedure, produce a gear shift action according to this gear shift signal, and make gear choosing by this gear shift actionSelect unit and produce a gear conforming to this testing component, and skip back to step (1).
Described self-balancing bridge circuit gear system of selection, wherein, this gear selected cell includes a plurality of gear modelsEnclose.
Via self-balancing bridge circuit gear selecting arrangement provided by the present invention and measuring method thereof, be mainly to utilize relativelyDevice carries out imaginary point voltage (VG) compare with default voltage, judge whether two signals reach balance, and by system computing controlWhether unit judges processed exports driving signal, and then orders about gear selected cell and carry out gear shift action, reaches thus accurate and fastThe gear shift of speed.
Brief description of the drawings
Fig. 1 is the self-balancing bridge circuit gear selecting arrangement block diagram of the first embodiment of the present invention;
Oscillogram when Fig. 2 A is the imaginary point balance of voltage of the present invention;
Oscillogram when Fig. 2 B is imaginary point Voltage unbalance of the present invention;
Fig. 3 is the self-balancing bridge circuit gear selecting arrangement block diagram of the second embodiment of the present invention;
Fig. 4 is the self-balancing bridge circuit gear system of selection flow chart of the first embodiment of the present invention;
Fig. 5 is the self-balancing bridge circuit gear system of selection flow chart of the second embodiment of the present invention.
Primary clustering symbol description in accompanying drawing:
Self-balancing bridge circuit gear selecting arrangement 1,2;
Self-balancing bridge circuit gear system of selection 100,200;
Test signal source z11,21;
Testing component 12,22;
Operational amplifier 13,23;
Gear selected cell 14,24;
Comparator 15,25;
System Operations Analysis 16,26;
Voltage (V to be measuredDut) curve L1;
Gear voltage (VRr) curve L2;
Imaginary point voltage (VG) curve L3;
Step 1001,1002,1003,1004,1005,1006,1007,2001,2002,2003,2004,2005,2006,2007。
Detailed description of the invention
In order to solve ammeter in background technology in operation and the problem measuring, autobalance electricity provided by the inventionBridge gear selecting arrangement, is received the test signal of test signal source output and is produced electric current to be measured via void by a testing componentPoint enters gear selected cell, and operational amplifier can receive reference voltage and imaginary point voltage and export gear voltage to gear and selectSelect unit, form feedback path to imaginary point by gear selected cell, and then form imaginary point voltage, then by comparator by imaginary point electricityPress with default voltage and compare and export driving signal, now system Operations Analysis can be according to driving signal to order about gearSelected cell carries out gear shift action. Therefore the present invention is measurement mechanism rapid detection testing component the choosing of acceleration gear thusSelect, to increase the flexibility ratio of ammeter application.
Self-balancing bridge circuit gear provided by the invention system of selection, receives the output of test signal source by a testing componentTest signal and produce electric current to be measured and enter gear selected cell via imaginary point, and operational amplifier can receive reference voltage withImaginary point voltage is also exported gear voltage to gear selected cell, forms feedback path to imaginary point by gear selected cell, and thenForm imaginary point voltage, then by comparator, imaginary point voltage and default voltage are compared to also outputting drive voltage, when comparator connectsAfter receiving imaginary point voltage, can compare with default voltage, in the time reaching balance, proceed loop program, if do not reach balanceOutput drives signal flog system Operations Analysis carry out operation program and produce gear shift signal, and gear selected cellCarry out according to gear shift signal the gear that gear shift action generation conform to testing component, and continue to carry out loop program. This measurementMethod can increase switching speed also can be selected by automatic gear, increases the flexibility ratio of ammeter application.
The present invention also provides a kind of self-balancing bridge circuit gear selecting arrangement, receives test signal source by a testing componentThe test signal of output also produces electric current to be measured and enters gear selected cell via imaginary point, and operational amplifier can receive with reference to electricityPress with imaginary point voltage and export gear voltage to gear selected cell, forming feedback path to imaginary point by gear selected cell,And then form imaginary point voltage, afterwards again by comparator by gear voltage (VRr) compare and export to drive with default voltage and interrogateNumber, now system Operations Analysis can carry out gear shift action according to driving signal to order about gear selected cell, measures thus dressPut rapid detection testing component acceleration gear and select, to increase the flexibility ratio of ammeter application.
The present invention also provides the system of selection of a kind of self-balancing bridge circuit gear, receives test signal source by a testing componentThe test signal of output also produces electric current to be measured and enters gear selected cell via imaginary point, and operational amplifier can receive with reference to electricityPress with imaginary point voltage and export gear voltage to gear selected cell, forming feedback path to imaginary point by gear selected cell,And then form imaginary point voltage, afterwards by comparator by gear voltage (VRr) compare and export driving signal with default voltage,After comparator receives imaginary point voltage, can compare with default voltage, in the time reaching balance, proceed loop program,Export driving signal flog system Operations Analysis execution operation program and produce gear shift signal if do not reach balance, and gearSelected cell carries out according to gear shift signal the gear that gear shift action generation conform to testing component, and continues to carry out loop journeyOrder.
Specifically, the self-balancing bridge circuit gear selecting arrangement that utilizes provided by the invention, comprising: a test signal source,In order to export a test signal; One testing component, has an input and an output, and wherein input is electrically connected at surveyExamination signal source is in order to receive test signal, and test signal is a voltage (V to be measuredDut); One operational amplifier, has one just defeatedEnter end, a negative input end and an output, wherein positive input terminal is in order to receive a reference voltage (VRef), negative input end and to be measuredThe output of assembly connects, and output is in order to export a gear voltage (VRr); One gear selected cell, have a first end,One second end and one the 3rd end, wherein first end is electrically connected at the output of operational amplifier, in order to receive gear voltage(VRr), the second end is coupled to the contact between the output of testing component and the negative input end of operational amplifier, and exports an imaginary pointVoltage (VG); One comparator, has a positive input terminal, a negative input end and an output, and wherein positive input terminal is in order to receiveOne default voltage, negative input end is coupled to the contact between the output of testing component and the negative input end of operational amplifier, and connectsReceive the imaginary point voltage (V from gear selection unitG), wherein comparator is to treat voltage (V in order to compare imaginary pointG) and default voltage,And drive signal by output output one; And a system Operations Analysis, there is a first end and one second end, Qi ZhongOne end is coupled to the 3rd end of gear selected cell, and the second termination is received the driving signal of exporting from comparator, wherein systemOperations Analysis drives after signal via computing, and produce a gear shift signal, and export gear selected cell to via first end,Order about gear selected cell and carry out a gear shift action, and by gear shift action, gear selected cell generation one is conformed to testing componentGear.
The present invention then provides one to utilize the system of selection of self-balancing bridge circuit gear, comprising:
(1) provide a test signal source, in order to export a test signal;
(2) provide a testing component, it has an input and an output, and wherein input is electrically connected at testSignal source is in order to receive this test signal, and this test signal is a voltage (V to be measuredDut)；
(3) provide an operational amplifier, there is a positive input terminal and receive a reference voltage (VRef), one negative input end receiveImaginary point voltage (VG), and export a gear voltage (V by outputRr)；
(4) provide a gear selected cell, receive gear voltage (VRr) and export an imaginary point voltage (VG)；
(5) carry out a comparison program, utilize a comparator to judge that imaginary point treats voltage (VG) with the relatively knot of a default voltageWhether fruit reaches balance, if while reaching balance, skips back to step (1), if while not reaching balance, exports a driving signal and goes forward side by sideRow step (6);
(6) carry out an operation program, utilize a system Operations Analysis to receive and drive signal, and produce gear shift newsNumber; And
(7) carry out a shift procedure, produce a gear shift action according to gear shift signal, and it is single by gear shift action, gear to be selectedUnit produces a gear conforming to testing component, and skips back to step (1).
The present invention provides another kind of self-balancing bridge circuit gear selecting arrangement again, comprising: a test signal source, and in order to outputOne test signal; One testing component, has an input and an output, and wherein input is electrically connected at test signal sourceIn order to receive this test signal, and this test signal is a voltage (V to be measuredDut); One operational amplifier, have a positive input terminal,One negative input end and an output, wherein positive input terminal is in order to receive a reference voltage (VRr), negative input end and testing componentOutput connects, and output is in order to export a gear voltage (VRr); One gear selected cell, has first end, one second endAnd one the 3rd end, wherein first end is electrically connected at the output of operational amplifier, in order to receive gear voltage (VRr), the second endBe coupled to the contact between the output of testing component and the negative input end contact of operational amplifier, and export an imaginary point voltage(VG); One comparator, has a positive input terminal, a negative input end and an output, and wherein negative input end is silent in order to receive oneRecognize voltage, positive input terminal is coupled to the contact between the output of operational amplifier and the first end of gear selected cell, and receivesFrom the gear voltage (V of operational amplifierRr), wherein comparator is in order to compare gear voltage (VRr) and default voltage, and byOutput output one drives signal; And a system Operations Analysis, there is first end and one second end, wherein first end couplingBe connected to the 3rd end of gear selected cell, the second termination is received the driving signal of exporting from comparator, wherein system computing controlUnit processed drives after signal via computing, produces a gear shift signal, and exports gear selection unit to via first end, orders about shelvesPosition selected cell carries out a gear shift action, and makes gear selected cell produce shelves that conform to this testing component by gear shift actionPosition.
The present invention then provides the system of selection of another kind of self-balancing bridge circuit gear again, comprising:
(1) provide a test signal source, in order to export a test signal;
(2) provide a testing component, it has an input and an output, and wherein input is electrically connected at testSignal source is in order to receive this test signal, and this test signal is a voltage (V to be measuredDut)；
(3) provide an operational amplifier, there is a positive input terminal and receive a reference voltage (VRef), one negative input end receiveImaginary point voltage (VG), and export a gear voltage (V by an outputRr)；
(4) provide a gear selected cell, receive gear voltage (VRr) and export imaginary point voltage (VG)；
(5) carry out a comparison program, utilize a comparator to judge gear voltage (VRr) with the comparative result of default voltage beThe no balance that reaches, if while reaching balance, skips back to step (1), while not reaching balance, exports a driving signal, and walksSuddenly (6);
(6) carry out an operation program, utilize a system Operations Analysis to receive and drive signal, and produce gear shift newsNumber; And
(7) carry out a shift procedure, produce a gear shift action according to gear shift signal, and it is single by gear shift action, gear to be selectedUnit produces a gear conforming to testing component, and skips back to step (1).
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Because the present invention discloses a kind of self-balancing bridge circuit gear selecting arrangement, receive and survey by a testing componentTry the test signal of signal source output and produce electric current to be measured to enter gear selected cell via imaginary point, and operational amplifier can connectReceive reference voltage and imaginary point voltage and export gear voltage to gear selected cell, forming feedback path by gear selected cellTo imaginary point, and then form imaginary point voltage, then by comparator, imaginary point voltage and default voltage compared and export driving signal,Now system Operations Analysis can carry out gear shift action to reach fast slewing according to driving signal to order about gear selected cellEffect. Wherein, measure general principle and the function of ammeter, conventionally know that for correlative technology field has the knowledgeable can understand,Therefore with explanation hereinafter, only for saying in detail with self-balancing bridge circuit gear of the present invention system of selection and device characteristic placeBright. In addition, the accompanying drawing in following interior literary composition, also not according to the actual complete drafting of relative dimensions, its effect only express withThe schematic diagram that feature of the present invention is relevant.
First, referring to Fig. 1, is the self-balancing bridge circuit gear selecting arrangement block diagram of the first embodiment of the present invention.As shown in Figure 1, self-balancing bridge circuit gear selecting arrangement 1 comprises: a test signal source 11, in order to export a test signal; OneTesting component 12, has an input and an output, and wherein input is electrically connected at test signal source 11 in order to receive surveyExamination signal, and signal test is a voltage (V to be measuredDut); One operational amplifier 13 have a positive input terminal, a negative input end andOne output, wherein positive input terminal is in order to receive a reference voltage (VRef), negative input end connects with the output of testing component 12Connect, output is in order to export a gear voltage (VRr); One gear selected cell 14, have a first end, one second end andOne the 3rd end, wherein first end is electrically connected at the output of operational amplifier 13, in order to receive gear voltage (VRr), the second endBe coupled to the contact between the output of testing component 12 and the negative input end of operational amplifier 13, and export an imaginary point voltage(VG); Wherein gear selected cell 14 is formed (for example: 10K Ω, 100K Ω ... wait gear) by a plurality of gear bands;One comparator 15, has a positive input terminal, a negative input end and an output, and wherein positive input terminal is in order to receive an acquiescence electricityPress; Negative input end is coupled to the contact between the output of testing component 12 and the negative input end of operational amplifier 13, and receivesFrom the imaginary point voltage (V of gear selection unit 14G), wherein comparator 15 is in order to compare imaginary point voltage (VG) and default voltage, andDrive signal by output output one; And a system Operations Analysis 16, there is first end and the second end, wherein first endThe 3rd end that is coupled to gear selected cell 14, the second end receives the driving signal of exporting from comparator 15, whereinSystem Operations Analysis 16 drives after signal via computing, produces a gear shift signal, and exports gear choosing to via first endSelect unit 14, order about gear selected cell 14 and carry out a gear shift action, and make gear selected cell 14 produce one by gear shift actionThe gear conforming to testing component 12. For example: testing component 12 is 10K Ω, but gear is falsely dropped the Ω into 100K, through autobalance electricityAfter bridge gear selecting arrangement 1 is adjusted, can automatically select to the gear of correct 10K Ω.
In order to further illustrate the detailed operation of operational amplifier 13 of the present invention, please also refer to Fig. 2 A and Fig. 2 B alsoCoordinate Fig. 1. First,, described in Fig. 1, the positive input terminal of operational amplifier 13 receives a reference voltage (VRef), negative input terminationReceive an imaginary point voltage (VG), and output one gear voltage (VRr), because of operational amplifier 13 internal structural characteristics, this operational amplifier13 output gear voltage (VRr) be: VRr＝A(VRef-VG), the gain that wherein A is this operational amplifier, because in normal workThe gain of making operational amplifier in region is all very large, in the time that operational amplifier passes through backfeed loop normal operating, namely defeatedGo out and can not exceed operational amplifier working range, the voltage difference of two inputs can be very little, that is to say imaginary point voltage (VG) meetingApproximate reference voltage (VRef); If but operational amplifier do not operate in normal operation region, the operational amplifier of equivalenceIt is very little that gain A can become.
Then, oscillogram when referring to Fig. 2 A and being the imaginary point balance of voltage of the present invention, represents voltage to be measured with L1 curve(VDut), L2 curve represents gear voltage (VRr), L3 curve represents imaginary point voltage (VG), poised state is meaning operational amplifierBe in normal operating state, now the voltage difference of operational amplifier two inputs can be very little, as shown in Figure 2 A, if definition referenceVoltage (VRef) be 0V, under desirable state, be coupled to the output of testing component 12 and the negative input end of operational amplifier 13Between the second end imaginary point voltage (V of gear selection unit 14G) should be 0V.
Follow again, the oscillogram when referring to Fig. 2 B and being virtual connection Voltage unbalance of the present invention, as shown in Figure 2 B, with L1 songLine represents voltage (V to be measuredDut), L2 curve represents gear voltage (VRr), L3 curve represents imaginary point voltage (VG), if gear is selectedIncorrect, operational amplifier does not operate in normal operation region, and gain A can be very little, now imaginary point voltage (VG) can be partiallyFrom reference voltage (VRef) one obviously can detecting amount, comparator 15 detects after this signal, output one drives signal drivetrainSystem Operations Analysis 16 carries out next step gear change process.
Then, referring to Fig. 3, is the self-balancing bridge circuit gear selecting arrangement block diagram of the second embodiment of the present invention.As shown in Figure 3, self-balancing bridge circuit gear selecting arrangement 2 comprises: a test signal source 21 is to export a test signal; OneTesting component 22 has an input and an output, and wherein input is electrically connected at test signal source 21 in order to receive testSignal, and test signal is a voltage (V to be measuredDut); One operational amplifier 23 has a positive input terminal, a negative input end andOutput; Wherein positive input terminal is in order to receive a reference voltage (VRef), negative input end connects with the output of testing component 22Connect, output is in order to export a gear voltage (VRr); One gear selected cell 24 has a first end, one second end andThe 3rd end, its first end is electrically connected at the output of operational amplifier 23, in order to receive gear voltage (VRr), the second end couplesContact between the output of testing component 22 and the negative input end of operational amplifier 23, and export an imaginary point voltage (VG); ItsMiddle gear selected cell 24 is formed (for example: 10K Ω, 100K Ω ... wait gear) by a plurality of gear bands; One comparator25, there is positive input terminal one negative input end and an output, wherein negative input end is in order to receive a default voltage, positive input terminalBe coupled to the contact between the output of operational amplifier 23 and the first end of gear selected cell 24, and receive from operation amplifierGear voltage (the V of device 23Rr); Comparator 25 is in order to compare gear voltage (VRr) and default voltage, output output one drives newsNumber; And one system Operations Analysis 26 there is a first end and one second end, wherein first end is coupled to gear and selects singleThe 3rd end of unit 24, the second end can receive the driving signal of exporting from comparator 25; Wherein system s operation control listUnit 26 drives after signal via computing, produces a gear shift signal, and exports gear selected cell 24 to via first end, orders about shelvesPosition selected cell 24 carries out gear shift action, and makes gear selected cell 24 produce one by gear shift action to conform to testing component 22Gear. For example: testing component 22 is 10K Ω, but gear is falsely dropped the Ω into 100K, adjusts through self-balancing bridge circuit gear selecting arrangement 2After whole, can automatically select to the gear of correct 10K Ω.
The self-balancing bridge circuit gear selecting arrangement of first embodiment of the invention and the second embodiment also can utilize simulation numberWord change-over circuit (not icon) connects voltage (V to be measuredDut), imaginary point voltage (VG) and gear voltage (VRr), for linking correlative measurementAmount equipment further links.
The present invention compares known technology, can be by operational amplifier 13 to imaginary point voltage (VG) and gear voltage (VRr) carry outWhether detecting gear is correct, and exports a driving signal driving system Operations Analysis 16 by comparator 25 and carry out next portionGear change process, and then reach effect of fast slewing.
Following, refer to Fig. 4, is self-balancing bridge circuit gear system of selection flow chart of the present invention. As shown in Figure 4,Self-balancing bridge circuit gear of the present invention system of selection 100, comprises following steps:
Step 1001: a test signal source is provided, in order to export a test signal, then enters step 1002;
Step 1002 a: testing component is provided, and in order to receive the test signal of test signal source output, and test signal isOne voltage (V to be measuredDut), then enter step 1003;
Step 1003 a: operational amplifier is provided, there is a positive input terminal and receive a reference voltage (VRef), a negative inputTermination is received imaginary point voltage (VG), and export a gear voltage (V by an outputRr), then enter step 1004;
Step 1004: a gear selected cell is provided, receives gear voltage (VRr) and export an imaginary point voltage (VG), thenEnter step 1005;
Step 1005: carry out a comparison program, utilize a comparator to judge imaginary point voltage (VG) with the comparison of default voltageWhether result reaches balance, if while reaching balance, skips back to step 1001, if while not reaching balance, exports a driving signal,And carry out step 1006;
Step 1006: carry out an operation program, utilize a system Operations Analysis to receive and drive signal, and produce one and changeShelves signal, then enters step 1007;
Step 1007: carry out a shift procedure, produce a gear shift action according to gear shift signal, and make shelves by gear shift actionPosition selected cell produces a gear conforming to testing component, and skips back to step 1001.
The present invention is except providing the self-balancing bridge circuit gear system of selection of above-mentioned the first embodiment. The second enforcement is also providedThe self-balancing bridge circuit gear system of selection of example. Referring to Fig. 5, is the self-balancing bridge circuit gear of the second embodiment of the present inventionSystem of selection flow chart. As shown in Figure 5, self-balancing bridge circuit gear system of selection 200, comprises following steps:
Step 2001: a test signal source is provided, in order to export a test signal, then enters step 2002;
Step 2002 a: testing component is provided, and in order to receive the test signal of test signal source output, and test signal isOne voltage (V to be measuredDut), then enter step 2003;
Step 2003: according to an operational amplifier, there is a positive input terminal and receive a reference voltage (VRef), a negative inputTermination is received imaginary point voltage (VG), and export a gear voltage (V by an outputRr), then enter step 2004;
Step 2004: a gear selected cell is provided, receives gear voltage (VRr) and export imaginary point voltage (VG), follow intoEnter step 2005;
Step 2005: carry out a comparison program, utilize a comparator to judge gear voltage (VRr) with the comparison of default voltageWhether result reaches balance, if while reaching balance, skips back to step 2001, if while not reaching balance, exports a driving signal,And enter step 2006;
Step 2006: carry out an operation program, utilize a system Operations Analysis to receive and drive signal, and produce one and changeShelves signal, then enters step 2007;
Step 2007: carry out a shift procedure, produce a gear shift action according to gear shift signal, and make gear by gear shift actionSelected cell produces a gear conforming to testing component, and skips back to step 2001.
The present invention compares known technology, can utilize comparator to imaginary point voltage (V by step 1005 or step 2005G) orGear voltage (VRr) whether detect gear correct, and utilize comparison program output one to drive by step 1006 or step 2006Moving signal driving system Operations Analysis carries out next gear change process, and then reaches effect of fast slewing.
Although the present invention describes as above with aforesaid preferred embodiment, so it is not in order to limit the present invention, this area skillArt personnel are without departing from the spirit and scope of the present invention when making a little change and retouching, therefore protection scope of the present inventionThe content that must be defined with the claim scope of application is as the criterion.
Claims (8)
1. a self-balancing bridge circuit gear selecting arrangement, comprising:
One test signal source, in order to export a test signal;
One testing component, has an input and an output, wherein this input be electrically connected at this test signal source in order toReceive this test signal, and this test signal is a voltage (V to be measuredDut)；
One operational amplifier, has a positive input terminal, a negative input end and an output, and wherein this positive input terminal is in order to receive oneReference voltage (VRef), this negative input end is connected with this output of this testing component, and this output is in order to export a gear electricityPress (VRr)；
One gear selected cell, has a first end, one second end and one the 3rd end, and wherein this first end is electrically connected at this fortuneCalculate this output of amplifier, in order to receive this gear voltage (VRr), this second end is coupled to this output of this testing componentAnd the contact between this negative input end of this operational amplifier, and export an imaginary point voltage (VG)；
One comparator, has a positive input terminal, a negative input end and an output, and wherein this positive input terminal is in order to receive an acquiescenceVoltage, this negative input end is coupled to the contact between this output of this testing component and this negative input end of this operational amplifier,And reception is from this imaginary point voltage (V of this gear selection unitG), wherein this comparator is in order to this imaginary point voltage (V relativelyG)With this default voltage, and drive signal by this output output one; And
One system Operations Analysis, has a first end and one second end, and wherein this first end is coupled to this gear and selects listThe 3rd end of unit, this second termination is received this driving signal of exporting from this comparator, wherein this system s operation control listUnit, via after this driving signal of computing, produces a gear shift signal, and exports this gear selected cell to via this first end, orders aboutThis gear selected cell carries out a gear shift action, and makes this generation one of gear selected cell and testing component phase by this gear shift actionThe gear of symbol.
2. self-balancing bridge circuit gear selecting arrangement according to claim 1, wherein, this gear selected cell includes multipleSeveral gear bands.
3. a self-balancing bridge circuit gear system of selection, comprising:
(1) provide a test signal source, in order to export a test signal;
(2) provide a testing component, it has an input and an output, and wherein this input is electrically connected at this testSignal source is in order to receive this test signal, and this test signal is a voltage (V to be measuredDut)；
(3) provide an operational amplifier, there is a positive input terminal and receive a reference voltage (VRef), a negative input end receives a voidPoint voltage (VG), and export a gear voltage (V by outputRr)；
(4) provide a gear selected cell, receive this gear voltage (VRr) and export this imaginary point voltage (VG)；
(5) carry out a comparison program, utilize a comparator to judge this imaginary point voltage (VG) with the comparative result of a default voltage whetherReach balance, if while reaching balance, skip back to step (1), if while not reaching balance, export a driving signal and carry out step(6)；
(6) carry out an operation program, utilize a system Operations Analysis to receive this driving signal, and produce a gear shift signal;And
(7) carry out a shift procedure, produce a gear shift action according to this gear shift signal, and by this gear shift action, this gear is selectedUnit produces a gear conforming to this testing component, and skips back to step (1).
4. self-balancing bridge circuit gear according to claim 3 system of selection, wherein, this gear selected cell includes multipleSeveral gear bands.
5. a self-balancing bridge circuit gear selecting arrangement, comprising:
One test signal source, in order to export a test signal;
One testing component, has an input and an output, wherein this input be electrically connected at this test signal source in order toReceive this test signal, and this test signal is a voltage (V to be measuredDut)；
One operational amplifier, has a positive input terminal, a negative input end and an output, and wherein this positive input terminal is in order to receive oneReference voltage (VRef), this negative input end is connected with this output of this testing component, and this output is in order to export a gear electricityPress (VRr)；
One gear selected cell, has a first end, one second end and one the 3rd end, and wherein this first end is electrically connected at this fortuneCalculate this output of amplifier, in order to receive this gear voltage (VRr), this second end is coupled to this output of this testing componentAnd the contact between this negative input end of this operational amplifier, and export an imaginary point voltage (VG)；
One comparator, has a positive input terminal, a negative input end and an output, and wherein this negative input end is in order to receive an acquiescenceVoltage, this positive input terminal is coupled to connecing between this output of this operational amplifier and this first end of this gear selected cellPoint, and receive this gear voltage (V from this operational amplifierRr), wherein this comparator is in order to this gear voltage relatively(VRr) and this default voltage, and drive signal by this output output one; And
One system Operations Analysis, has a first end and one second end, and wherein this first end is coupled to this gear and selects listThe 3rd end of unit, this second termination is received this driving signal of exporting from this comparator, wherein this system s operation control listUnit, via after this driving signal of computing, produces a gear shift signal, and exports this gear selection unit to via this first end, orders aboutThis gear selected cell carries out a gear shift action, and makes this generation one of gear selected cell and this testing component by this gear shift actionThe gear conforming to.
6. self-balancing bridge circuit gear selecting arrangement according to claim 5, wherein, this gear selected cell includes multipleSeveral gear bands.
7. a self-balancing bridge circuit gear system of selection, comprising:
(1) provide a test signal source, in order to export a test signal;
(2) provide a testing component, it has an input and an output, and wherein this input is electrically connected at this testSignal source is in order to receive this test signal, and this test signal is a voltage (V to be measuredDut)；
(3), according to an operational amplifier, there is a positive input terminal and receive a reference voltage (VRef), a negative input end receives a voidPoint voltage (VG), and export a gear voltage (V by an outputRr)；
(4) provide a gear selected cell, receive this gear voltage (VRr) and export this imaginary point voltage (VG)；
(5) carry out a comparison program, utilize a comparator to judge this gear voltage (VRr) with the comparative result of a default voltage beThe no balance that reaches, if while reaching balance, skips back to step (1), if while not reaching balance, exports a driving signal and walksSuddenly (6);
(6) carry out an operation program, utilize a system Operations Analysis to receive and drive signal, and produce a gear shift signal; WithAnd
(7) carry out a shift procedure, produce a gear shift action according to this gear shift signal, and it is single by this gear shift action, gear to be selectedUnit produces a gear conforming to this testing component, and skips back to step (1).
8. self-balancing bridge circuit gear according to claim 7 system of selection, wherein, this gear selected cell includes multipleSeveral gear bands.
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| CN201210490540.3A CN103837727B (en) | 2012-11-27 | 2012-11-27 | The system of selection of self-balancing bridge circuit gear and device |
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| CN103837727B true CN103837727B (en) | 2016-05-25 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1572088A (en) * | 1976-09-02 | 1980-07-23 | Genrad Inc | Method of and apparatus for automatic measurement of impedance and other parameters with microprocessor calculation techniques |
| CN1061662A (en) * | 1990-11-23 | 1992-06-03 | 约翰弗兰克制造公司 | Improved automatic function selecting multimeter |
| JPH077929A (en) * | 1993-06-18 | 1995-01-10 | Hiyoshi Denki Seisakusho:Kk | Control circuit of switching power supply |
| CN1268669A (en) * | 2000-03-31 | 2000-10-04 | 华南师范大学 | Automatic range-switching digital multimeter and its automatic range-switching method |
| JP2005055381A (en) * | 2003-08-07 | 2005-03-03 | Yokogawa Electric Corp | Measuring device |
| CN2685886Y (en) * | 2003-11-24 | 2005-03-16 | 北京北阳电子技术有限公司 | Digital universal tester |
| CN1655448A (en) * | 2004-02-13 | 2005-08-17 | 瑞昱半导体股份有限公司 | Output impedance control circuit and control method |
| CN101650380A (en) * | 2008-08-15 | 2010-02-17 | 承永资讯科技股份有限公司 | Intelligent measuring device automatically selecting measuring functions |
-
2012
- 2012-11-27 CN CN201210490540.3A patent/CN103837727B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1572088A (en) * | 1976-09-02 | 1980-07-23 | Genrad Inc | Method of and apparatus for automatic measurement of impedance and other parameters with microprocessor calculation techniques |
| CN1061662A (en) * | 1990-11-23 | 1992-06-03 | 约翰弗兰克制造公司 | Improved automatic function selecting multimeter |
| JPH077929A (en) * | 1993-06-18 | 1995-01-10 | Hiyoshi Denki Seisakusho:Kk | Control circuit of switching power supply |
| CN1268669A (en) * | 2000-03-31 | 2000-10-04 | 华南师范大学 | Automatic range-switching digital multimeter and its automatic range-switching method |
| JP2005055381A (en) * | 2003-08-07 | 2005-03-03 | Yokogawa Electric Corp | Measuring device |
| CN2685886Y (en) * | 2003-11-24 | 2005-03-16 | 北京北阳电子技术有限公司 | Digital universal tester |
| CN1655448A (en) * | 2004-02-13 | 2005-08-17 | 瑞昱半导体股份有限公司 | Output impedance control circuit and control method |
| CN101650380A (en) * | 2008-08-15 | 2010-02-17 | 承永资讯科技股份有限公司 | Intelligent measuring device automatically selecting measuring functions |
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| CN103837727A (en) | 2014-06-04 |
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