CN104101782A - Resistance testing circuit and testing device - Google Patents
Resistance testing circuit and testing device Download PDFInfo
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- CN104101782A CN104101782A CN201310132040.7A CN201310132040A CN104101782A CN 104101782 A CN104101782 A CN 104101782A CN 201310132040 A CN201310132040 A CN 201310132040A CN 104101782 A CN104101782 A CN 104101782A
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Abstract
The invention discloses a resistance testing circuit and a testing device. the resistance testing circuit comprises a DC power module, a first detection module, a plurality of second detection modules and a voltage-stabilizing module, wherein the first detection module comprises a detection voltage division resistor; one end of the detection voltage division resistor is used for being electrically connected with one end of a to-be-tested resistor to serve as a probe connection end; the negative electrode of the DC power module is used for being electrically connected with the other end of the to-be-tested resistor to serve as another probe connection end; the other end of the detection voltage division resistor is connected with the positive electrode of the DC power module; the forward voltage connection end of the voltage-stabilizing module is connected with the positive electrode of the DC power module; and the other end of the voltage-stabilizing module is connected with the negative electrode of the DC power module. A simple and combined circuit is used for testing and conducting the resistor, the resistance range can be quickly displayed, portability and reliability of the detection tool can be improved, the circuit has the advantages of being simple, reliable, little in power consumption, small in size, convenient in carrying and the like, and thus the working efficiency is improved.
Description
Technical field
The present invention relates to test fixture design field, especially relate to a kind of resistance value test circuit and proving installation.
Background technology
At present, lamp lighting is seen everywhere in modern society the inside, the light fixture using in all trades and professions has different purposes, light fixture all can all detect the property indices of light fixture when researching and developing and producing, testing, keeping in repair, and because light fixture is used electricity, the resistance between those local conductors of light fixture the inside need to be very little, those places need resistance very large, the object that arrives insulation, these places all will be detected, and detect the standard whether these local resistance meet design; Real-time follow-up test component resistance variations etc. is provided during test; In use, fault is judged, in the long-term process of using, parts is aging, and whether its performance goes down, and whether can also reach the requirement of use, all needs to detect; To make judgement fast.
Summary of the invention
Technical matters to be solved by this invention is how to utilize the circuit structure of simple possible to test the approximate range of various testing resistances, to improve portability and the reliability that detects frock, and reduces testing cost, improves tester's work efficiency.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of resistance value test circuit, and described in it, circuit comprises: DC power supplier, first detection module, a plurality of the second detection module and Voltage stabilizing module; Described first detection module comprises detection divider resistance, one end that one end of described detection divider resistance is used for being electrically connected to testing resistance is as a probe incoming end, the other end that the negative pole of described DC power supplier is used for being electrically connected to testing resistance is as another probe incoming end, and the other end of described detection divider resistance connects the positive pole of described DC power supplier; The forward voltage incoming end of described Voltage stabilizing module connects the positive pole of described DC power supplier, and the other end of described Voltage stabilizing module connects the negative pole of described DC power supplier;
Described a plurality of the second detection module comprises the second indicating member respectively, operational amplifier and electric resistance partial pressure sample circuit, the input of electric resistance partial pressure sample circuit described in each second detection module connects the forward voltage end of described Voltage stabilizing module, the dividing potential drop output terminal of described electric resistance partial pressure sample circuit connects the inverting input of described operational amplifier, the normal phase input end of described operational amplifier connects one end of detecting divider resistance described in described first detection module, the output of described operational amplifier connects the negative pole of described DC power supplier by described the second indicating member, and the 3rd end of described electric resistance partial pressure sample circuit connects the negative pole of described DC power supplier.
In such scheme, described in described the second detection module, the voltage sampling of electric resistance partial pressure sample circuit than K is:
Wherein, x represents the numbering that the second detection module is corresponding, x=1,2,3, V
1for the output of described DC power supplier, V
z1voltage stabilizing value for described Voltage stabilizing module; R
r14for the resistance value of described detection divider resistance,
for the lower limit in the corresponding default resistance interval arranging of current x the second detection module, and, the x of serial number the corresponding default resistance interval of detecting of described the second detection module institute
be set to from an initial resistance
a plurality of continuous resistance starting is interval, and adjacent higher limit in the resistance interval arranging continuously
and lower limit
identical.
In such scheme, described first detection module also comprises the first Tip element, and described the first Tip element is connected between the forward voltage incoming end of described Voltage stabilizing module and the other end of described detection divider resistance.
In such scheme, described the first Tip element is light emitting diode, and the positive pole of described diode connects the positive pole of DC power supplier, and the negative pole of diode connects the other end of described detection divider resistance.
In such scheme, described the second Tip element is the cascaded structure of current-limiting resistance and light emitting diode.
In such scheme, in above-mentioned first detection module, also comprise switch element, described switch element is connected on the positive pole of DC power supplier and the forward voltage incoming end of described Voltage stabilizing module.
Based on such scheme, a kind of resistance value proving installation is also provided, it comprises:
One housing for resistance value test circuit described in fixing the claims 1 to 6 arbitrary claim is provided with probe on described housing, and described probe is electrically connected to described resistance value test circuit, for contact measured resistance.
In such scheme, described probe is drawn from housing by wire.
In such scheme, described probe embeds the surface of housing, and testing resistance contacts with described probe by the mode of detachable plug.
Problem to be solved by this invention is to utilize a kind of simple combination circuit, test conduction resistance, shows Standard resistance range fast, improves the portability and the reliability that detect frock, have simple, reliable, little power consumption, volume little, the advantage such as be convenient for carrying, thereby increase work efficiency.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention;
Fig. 2 is one embodiment of the invention electrical block diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Based on foregoing problems, the present invention aims to provide a kind of method for test resistance value, and it can show Standard resistance range fast, and have simple, reliable, little power consumption, volume little, the advantage such as be convenient for carrying, to improve the work efficiency of electric circuit inspection.
As shown in Figure 1, embodiments of the invention provide a kind of resistance value test circuit, and it comprises: DC power supplier 400, first detection module 100, a plurality of the second detection module 200 and Voltage stabilizing module 300; Described first detection module 100 comprises detection divider resistance 102, one end that one end of described detection divider resistance 102 is used for being electrically connected to testing resistance 500 is as a probe incoming end, the other end that the negative pole of described DC power supplier 400 is used for being electrically connected to testing resistance is as another probe incoming end, the other end of described detection divider resistance 102 connects the positive pole of described DC power supplier 400, here detect divider resistance 102 and form bleeder circuits with testing resistance 500 and obtain voltage from the output of described DC power supplier 400, and A point in Fig. 1 obtains detection voltage; The forward voltage incoming end of described Voltage stabilizing module 300 connects the positive pole of described DC power supplier 400, and the other end of described Voltage stabilizing module 300 connects the negative pole of described DC power supplier;
Described a plurality of the second detection module 200 comprises the second indicating member 202 respectively, operational amplifier 201 and electric resistance partial pressure sample circuit 203, in each second detection module 200, the input of described electric resistance partial pressure sample circuit 203 connects the forward voltage end of described Voltage stabilizing module 300, the dividing potential drop output terminal of described electric resistance partial pressure sample circuit 203 connects the inverting input of described operational amplifier 201, the normal phase input end of described operational amplifier 201 connects one end of detecting divider resistance 102 described in described first detection module 100, the normal phase input end that is described operational amplifier 201 receives the detection voltage of ordering from A, the output of described operational amplifier 201 connects the negative pole of described DC power supplier 400 by described the second indicating member 202, and the 3rd end of described electric resistance partial pressure sample circuit 203 connects the negative pole of described DC power supplier 400.
When the dividing potential drop of described testing resistance 500 in described first detection module 100 is greater than the output voltage of electric resistance partial pressure sample circuit 203 in a certain described the second detection module 200, the second indicating member 202 display reminding information in corresponding the second detection module 200; Otherwise when the dividing potential drop of described testing resistance 500 in described first detection module 100 is less than in described the second detection module 200 203 output of electric resistance partial pressure sample circuit, the second indicating member 202 in corresponding the second detection module 200 is display reminding information not.When the driven display reminding information of the second indicating member 202 of above-mentioned each the second detection module 200 or not display reminding information, all characterizing resistance 500 to be detected and dropping in a default resistance interval, this default resistance section definition is
wherein,
represent interval lower limit,
represent interval higher limit, x represents the numbering of the second detection module 200 correspondences, x=1,2,3 ...
In order to judge continuously a plurality of testing resistances, that 200 corresponding default resistances that detect of x the second detection module of said sequence numbering are interval
be set to from an initial resistance
a plurality of continuous resistance starting is interval, such as
adjacent higher limit in the resistance interval that guarantees to arrange continuously
and lower limit
identical,
for example, from the corresponding default resistance of first the second detection module 200 interval, start to be set as respectively (1 Ω, 10 Ω), (10 Ω, 100 Ω), (100 Ω, 1000 Ω), be greater than 1000 Ω etc.What default resistance interval can be detected according to user need to arrange according to above-mentioned rule, higher limit adjacent in resistance interval is set continuously consistent with lower limit.Above-mentioned, arrange continuously behind the corresponding default resistance of the second detection module 200 interval, the voltage sampling that can set corresponding electric resistance partial pressure sample circuit 203 according to following formula (1) is than K, to facilitate testing circuit to carry out detection display to the resistance of a plurality of different resistances simultaneously.
Described in above-mentioned the second detection module 200, the voltage sampling of electric resistance partial pressure sample circuit 203 than K is:
Wherein, x represents the numbering of the second detection module 200 correspondences, x=1,2,3, V
1for the output of described DC power supplier, V
z1voltage stabilizing value for described Voltage stabilizing module; R
r14for the resistance value of described detection divider resistance 102,
lower limit for current x the second detection module 200 corresponding default resistance intervals that arrange.
When according to foregoing circuit structure, when testing resistance is access in probe, the driven display reminding information of the second Tip element 202 or not driven display reminding information in above-mentioned the second detection module 200, the second indicating member 202 of above-mentioned each the second detection module 200 is during display reminding information, characterizing resistance 500 to be detected and dropping into and be less than
scope in, during the second indicating member 202 display reminding information of above-mentioned each the second detection module 200, drop into and be greater than
scope in.
Circuit structure based on above-described embodiment, described first detection module 100 also comprises the first Tip element 103, described the first Tip element 103 is connected between the forward voltage incoming end of described Voltage stabilizing module 300 and the other end of described detection divider resistance 102.Be used for guaranteeing normally to work at circuit, and can give and prompting while accessing testing resistance 500, can also drop in the resistance of testing resistance 500 lower limit that is less than the default resistance of above-mentioned minimum interval simultaneously
during scope, point out, simultaneously for pick-up unit has increased a sensing range
prompting.
As shown in Figure 2, circuit structure based on above-described embodiment, above-mentioned the first Tip element 103 and the second Tip element 202 can adopt diode as shown in Figure 2 to realize, in first detection module 100, diode D5 is used for realizing the first Tip element 103, the positive pole of described diode D5 connects the positive pole of DC power supplier 400, the negative pole of diode D5 connects the other end that detects divider resistance 102, and detecting divider resistance 102 is the resistance R 14 in Fig. 4.In the second detection module 200, the output of operational amplifier 201 connects the positive pole of diode, and the negative pole of diode connects the negative pole of DC power supplier 400.In addition; in order to protect diode; can also adopt at the second Tip element 202 and add current-limiting resistance; cascaded structure by current-limiting resistance and light emitting diode forms the second Tip element, such as the output of operational amplifier 201 in the second detection module 200 successively by the positive pole of diode, connect the negative pole of DC power supplier 400 after the negative pole of diode, current-limiting resistance.Indication here provides a kind of display mode of information comparatively easily, similarly can also adopt other modes.
Circuit structure based on above-described embodiment, the electric resistance partial pressure sample circuit 203 in above-mentioned the second detection module 200 adopts two resistance to be connected between the forward voltage incoming end of Voltage stabilizing module 300 and the negative pole of DC power supplier 400 to obtain the reference voltage that inputs to operational amplifier 201 inverting inputs.This circuit structure is fairly simple, and components and parts are few, can also realize electric resistance partial pressure sample circuit 203 voltage samplings than the adjusting of K by changing divider resistance, the voltage sampling here refers to the ratio of said reference voltage and Voltage stabilizing module output voltage than K.
Circuit structure based on above-described embodiment, above-mentioned Voltage stabilizing module 300 adopts the stabilivolt Z1 shown in Fig. 2, the negative electrode of described stabilivolt Z1 connects the positive pole of DC power supplier 400, the negative pole of the anodic bonding DC power supplier 400 of described stabilivolt Z1 by current-limiting resistance R9.
Circuit structure based on above-described embodiment, also comprises switch element 101 in above-mentioned first detection module 100, and described switch element 101 is connected on the positive pole of DC power supplier 400 and the forward voltage incoming end of described Voltage stabilizing module 300.The preferred push switch of switch element 101 here, or single-pole single-throw switch (SPST).Its role is to play the whole testing circuit of free operant and whether work, play the object of holding circuit protection.
The circuit modular structure providing based on above-described embodiment, can combination in any obtain new technical scheme, but still in the present invention, protect in scope of disclosure.
As shown in Figure 2, below, with an optimum embodiment, introduce the principle of work of above-mentioned testing circuit frock.In Fig. 2, DC power supplier 400 consists of battery V1, for circuit provides power supply.Switch element 101 consists of touch-switch SW1, and rear disconnection is unclamped in conducting while pressing.Resistance R 14 is for detecting divider resistance 102, the first Tip element 103 consists of light emitting diode D5, when probe touches the two ends of testing resistance 500, press after touch-switch SW1, light emitting diode D5, battery V1, testing resistance 500, resistance R 14 form a power circuit successively, and detect voltage in A point output one; Voltage stabilizing module 300 adopts current-limiting resistance R9 and stabilivolt Z1 to form, and the output of touch-switch SW1 connects the negative electrode of stabilivolt Z1, the negative pole of the anodic bonding battery V1 of stabilivolt Z1 by current-limiting resistance R9.In the present embodiment, as shown in Figure 2, select 4 the second detection modules 200, in turn in the 1st the second detection module 200, the second Tip element 202 adopts light emitting diode D1 and current-limiting resistance R10 formation in sequential series, electric resistance partial pressure sample circuit 203 adopts resistance R 1 and resistance R 2 series connection dividing potential drops to form, resistance R 1 and resistance R 2 are connected between the negative electrode of stabilivolt Z1 and the negative pole of battery V1 successively, the negative pole of the anodic bonding battery V1 of stabilivolt Z1, the node of resistance R 1 and resistance R 2 is as the inverting input of output concatenation operation amplifier LM324; In like manner, in the 2nd the second detection module 200, the second Tip element 202 adopts light emitting diode D2 and current-limiting resistance R11 formation in sequential series, electric resistance partial pressure sample circuit 203 adopts resistance R 3 and resistance R 4 series connection dividing potential drops to form, resistance R 3 and resistance R 4 are connected between the negative electrode of stabilivolt Z1 and the negative pole of battery V1 successively, and the node of resistance R 3 and resistance R 4 is as the inverting input of output concatenation operation amplifier LM324; In the 3rd the second detection module 200, the second Tip element 202 adopts light emitting diode D3 and current-limiting resistance R12 formation in sequential series, electric resistance partial pressure sample circuit 203 adopts resistance R 5 and resistance R 6 series connection dividing potential drops to form, resistance R 5 and resistance R 6 are connected between the negative electrode of stabilivolt Z1 and the negative pole of battery V1 successively, and the node of resistance R 5 and resistance R 6 is as the inverting input of output concatenation operation amplifier LM324; In the 4th the second detection module 200, the second Tip element 202 adopts light emitting diode D4 and current-limiting resistance R13 formation in sequential series, electric resistance partial pressure sample circuit 203 adopts resistance R 7 and resistance R 8 series connection dividing potential drops to form, resistance R 7 and resistance R 8 are connected between the negative electrode of stabilivolt Z1 and the negative pole of battery V1 successively, and the node of resistance R 7 and resistance R 8 is as the inverting input of output concatenation operation amplifier LM324.The default resistance of determining according to demand 4 the second detection modules 200 is interval
be respectively (1 Ω, 10 Ω), (10 Ω, 100 Ω), (100 Ω, 1000 Ω), be greater than 1000 Ω, then according to above-mentioned formula (1), the voltage sampling of determining electric resistance partial pressure sample circuit 203 in each second detection module 20 is the divider resistance in order to selected electric resistance partial pressure sample circuit 203 than K.
Based on said structure, when circuit access testing resistance, and press after touch-switch SW1,
Light emitting diode D5 is shinny, represents the scope that the resistance of testing resistance belongs to (0,1 Ω);
Light emitting diode D5, D1 are all shinny, represent the scope that the resistance of testing resistance belongs to (1 Ω, 10 Ω);
Light emitting diode D5, D1, D2 are all shinny, represent the scope that the resistance of testing resistance belongs to (10 Ω, 100 Ω);
Light emitting diode D5, D1, D2, D3 are all shinny, represent the scope that the resistance of testing resistance belongs to (100 Ω, 1000 Ω);
Light emitting diode D5, D1, D2, D3, D4 are all shinny, represent that the resistance of testing resistance belongs to the scope that is greater than 1000 Ω.
Above-mentioned resistance R 1 and R2, R3 and R4, R5 and R6, R7 and R8 play dividing potential drop metering function; Provide reference voltage to be input to the negative end of LM324 amplifier simultaneously; These resistance selections must be larger, the little power consumption that disappears during work, and battery can be worked for a long time; In foregoing circuit structure, default resistance interval as required comes the dividing potential drop ratio of regulating resistance pressure sampling circuit to determine the resistance of corresponding divider resistance, so just can meet the use in a lot of places.
Based on foregoing circuit structure, the present invention also provides a kind of resistance value proving installation, and it specifically comprises a housing for fixing above-mentioned resistance value test circuit, on described housing, is provided with probe, and described probe is electrically connected to above-mentioned resistance value test circuit.Do not repeat the tired specific implementation circuit of stating above-mentioned resistance value test circuit here, specifically referring to above-mentioned explanation.In addition, above-mentioned probe can adopt the mode of drawing from housing by wire, also can adopt the mode that embeds surface of shell, and in this mode, testing resistance contacts with described probe by the mode of detachable plug.
In sum, the present invention is by the certain circuit of the combination such as light emitting diode and operational amplifier, and test conduction resistance, shows Standard resistance range fast, have simple, reliable, little power consumption, volume little, the advantage such as be convenient for carrying, thereby increase work efficiency.
The present invention is not limited to above-mentioned preferred forms; also should comprise and adopt the disclosed circuit modular structure of above-described embodiment mutually to combine arbitrary technical scheme afterwards; anyone should learn the structural change of making under enlightenment of the present invention; every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (9)
1. a resistance value test circuit, is characterized in that, described circuit comprises: DC power supplier, first detection module, a plurality of the second detection module and Voltage stabilizing module; Described first detection module comprises detection divider resistance, one end that one end of described detection divider resistance is used for being electrically connected to testing resistance is as a probe incoming end, the other end that the negative pole of described DC power supplier is used for being electrically connected to testing resistance is as another probe incoming end, and the other end of described detection divider resistance connects the positive pole of described DC power supplier; The forward voltage incoming end of described Voltage stabilizing module connects the positive pole of described DC power supplier, and the other end of described Voltage stabilizing module connects the negative pole of described DC power supplier;
Described a plurality of the second detection module comprises the second indicating member respectively, operational amplifier and electric resistance partial pressure sample circuit, the input of electric resistance partial pressure sample circuit described in each second detection module connects the forward voltage end of described Voltage stabilizing module, the dividing potential drop output terminal of described electric resistance partial pressure sample circuit connects the inverting input of described operational amplifier, the normal phase input end of described operational amplifier connects one end of detecting divider resistance described in described first detection module, the output of described operational amplifier connects the negative pole of described DC power supplier by described the second indicating member, and the 3rd end of described electric resistance partial pressure sample circuit connects the negative pole of described DC power supplier.
2. resistance value test circuit according to claim 1, is characterized in that, described in described the second detection module, the voltage sampling of electric resistance partial pressure sample circuit than K is:
Wherein, x represents the numbering that the second detection module is corresponding, x=1,2,3, V
1for the output of described DC power supplier, V
z1voltage stabilizing value for described Voltage stabilizing module; R
r14for the resistance value of described detection divider resistance,
for the lower limit in the corresponding default resistance interval arranging of current x the second detection module, and, the x of serial number the corresponding default resistance interval of detecting of described the second detection module institute
be set to from an initial resistance
a plurality of continuous resistance starting is interval, and adjacent higher limit in the resistance interval arranging continuously
and lower limit
identical.
3. resistance value test circuit according to claim 1, it is characterized in that, described first detection module also comprises the first Tip element, and described the first Tip element is connected between the forward voltage incoming end of described Voltage stabilizing module and the other end of described detection divider resistance.
4. resistance value test circuit according to claim 3, is characterized in that, described the first Tip element is light emitting diode, and the positive pole of described diode connects the positive pole of DC power supplier, and the negative pole of diode connects the other end of described detection divider resistance.
5. resistance value test circuit according to claim 1, is characterized in that, described the second Tip element is the cascaded structure of current-limiting resistance and light emitting diode.
6. resistance value test circuit according to claim 1, is characterized in that, also comprises that switch element, described switch element are connected on the positive pole of DC power supplier and the forward voltage incoming end of described Voltage stabilizing module in above-mentioned first detection module.
7. a resistance value proving installation, is characterized in that, described device comprises:
One housing for resistance value test circuit described in fixing the claims 1 to 6 arbitrary claim is provided with probe on described housing, and described probe is electrically connected to described resistance value test circuit, for contact measured resistance.
8. resistance value proving installation according to claim 7, is characterized in that, described probe is drawn from housing by wire.
9. resistance value proving installation according to claim 7, is characterized in that, described probe embeds the surface of housing, and testing resistance contacts with described probe by the mode of detachable plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132040.7A CN104101782A (en) | 2013-04-15 | 2013-04-15 | Resistance testing circuit and testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310132040.7A CN104101782A (en) | 2013-04-15 | 2013-04-15 | Resistance testing circuit and testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104101782A true CN104101782A (en) | 2014-10-15 |
Family
ID=51670097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310132040.7A Pending CN104101782A (en) | 2013-04-15 | 2013-04-15 | Resistance testing circuit and testing device |
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| CN (1) | CN104101782A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870264A (en) * | 2016-10-12 | 2018-04-03 | 杨甫进 | Electric wire tester and its method |
| CN108152592A (en) * | 2017-12-27 | 2018-06-12 | 北京航天测控技术有限公司 | A kind of lead impedance measuring system |
-
2013
- 2013-04-15 CN CN201310132040.7A patent/CN104101782A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870264A (en) * | 2016-10-12 | 2018-04-03 | 杨甫进 | Electric wire tester and its method |
| CN107870264B (en) * | 2016-10-12 | 2020-09-11 | 成武县晨晖环保科技有限公司 | Wire and cable tester and method thereof |
| CN108152592A (en) * | 2017-12-27 | 2018-06-12 | 北京航天测控技术有限公司 | A kind of lead impedance measuring system |
| CN108152592B (en) * | 2017-12-27 | 2020-04-03 | 北京航天测控技术有限公司 | Lead impedance measurement system |
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Application publication date: 20141015 |