CN108957136A - Multi-grade measuring device and its bridge circuit for measurement - Google Patents
Multi-grade measuring device and its bridge circuit for measurement Download PDFInfo
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- CN108957136A CN108957136A CN201810674068.6A CN201810674068A CN108957136A CN 108957136 A CN108957136 A CN 108957136A CN 201810674068 A CN201810674068 A CN 201810674068A CN 108957136 A CN108957136 A CN 108957136A
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- resistance
- electric
- bridge
- bridge circuit
- measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
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- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The application provides a kind of multi-grade measuring device and its bridge circuit for measurement, the bridge circuit is provided with the first electric bridge and the second electric bridge, first resistor and second resistance have been arranged in series on first electric bridge, second electric bridge is arranged in parallel with first electric bridge, electric resistance measuring apparatus and variable resistance have been arranged in series on second electric bridge, the variable resistance is electric adjustable resistor, for controlling the target resistance values of the variable resistance according to electric signal, realization matches with the different grades of function resistance value of the electric resistance measuring apparatus, the corresponding measurement realized to different measurement objects.The application can use the resistance value of different grades according to different measurement objects, manufacture different electric resistance measuring apparatus without redesigning, the applicability of the application is wider, user-friendly.
Description
Technical field
This application involves field of measuring technique, and in particular to a kind of multi-grade measuring device and its electric bridge electricity for measurement
Road.
Background technique
Wheatstone bridge (also known as wheatstone bridge) is that one kind can be with the instrument of precise measurement resistance.As shown in Figure 1, general
Wheatstone bridge resistance R1, R2, R3 (foil gauge), Rx are called four arms of electric bridge, and G is voltmeter for measuring voltage and providing
Voltage readings.
The bridge circuit that Wheatstone bridge is made of four resistance, this four resistance are called the bridge arm of electric bridge, favour respectively
Stone electric bridge measures the variation of physical quantity using the variation of resistance, then the voltage that single-chip microcontroller acquires variable resistance both ends is located
Reason, so that it may which the variation for calculating corresponding physical quantity is a kind of highly accurate measurement method.
Nonequilibrium bridge is generally used for the minor change of measurement resistance value, such as resistance wire (is made by resistance strain gage
Palisade is pasted between two layers of thin paper or plastic film and constitutes) cement on object, when deformation occurs for object, foil gauge also with
Deformation occurs, the R3 when resistance of foil gauge is from bridge balance becomes R3+ △ R, and the electric current I2 that at this moment galvanometer passes through also will
Variation, calculates the deformation quantity of object.
But in the prior art, foil gauge can only be measured for fixed object, and applicability is low, cannot achieve pair
The versatility of all objects causes level of application lower.
In view of the above problems in the prior art, the art needs a kind of multi-grade measuring device and its for measurement
Bridge circuit.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of multi-grade measuring device and its electricity for measurement
Bridge circuit can use the resistance value of different grades according to different measurement objects, different without redesigning manufacture
The applicability of electric resistance measuring apparatus, the application is wide, user-friendly.
The embodiment of the present application provides a kind of bridge circuit for measurement, and the bridge circuit includes:
First electric bridge has been arranged in series first resistor and second resistance on first electric bridge；
Second electric bridge is arranged in parallel with first electric bridge, has been arranged in series electric resistance measuring apparatus on second electric bridge
And variable resistance, the variable resistance is electric adjustable resistor, for controlling the variable resistance according to electric signal
Target resistance values, realization match with the different grades of function resistance value of the electric resistance measuring apparatus, corresponding to realize to different surveys
Measure the measurement of object.
The embodiment of the present application also provides a kind of multi-grade measuring device, and the multi-grade measuring device is used for using above-mentioned
The bridge circuit of measurement.
Above-mentioned multi-grade measuring device and its bridge circuit for measurement, the bridge circuit be provided with the first electric bridge and
Second electric bridge has been arranged in series first resistor and second resistance, second electric bridge and first electricity on first electric bridge
Bridge is arranged in parallel, and electric resistance measuring apparatus and variable resistance have been arranged in series on second electric bridge, and the variable resistance is
Electric adjustable resistor is realized and the resistance measurement for controlling the target resistance values of the variable resistance according to electric signal
The different grades of function resistance value of device matches, the corresponding measurement realized to different measurement objects.The application can be according to not
Same measurement object uses the resistance value of different grades, manufactures different electric resistance measuring apparatus, this Shen without redesigning
Applicability please is wider, user-friendly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of Huygens's measuring bridge in the prior art.
Fig. 2 is the structural schematic diagram in one embodiment of the application for the bridge circuit of measurement.
Specific embodiment
The application is described in detail below in conjunction with map file and its specification, referring to Fig. 2, Fig. 2 is the application one
Structural schematic diagram in embodiment for the bridge circuit of measurement.
In the present embodiment, the bridge circuit for measurement includes but is not limited to the first electric bridge and the second electric bridge.
It needs to illustrate first, first resistor R1 and second resistance R2 can be arranged in series on first electric bridge；
Second electric bridge is arranged in parallel with first electric bridge, and electric resistance measuring apparatus Rg and can has been arranged in series on second electric bridge
Variohm Rx, the variable resistance Rx are electric adjustable resistor or artificial adjustable resistor, for according to electric signal or people
Work adjusts and the target resistance values of control/change variable resistance Rx, realization and the electric resistance measuring apparatus Rg difference etc.
The function resistance value of grade matches, the corresponding measurement realized to different measurement objects.
In the present embodiment, the first resistor R1 and second resistance R2 can be equivalent resistance, in other words, i.e., its
In form equivalent first resistor R1 and second resistance R2 can be formed using multiple resistance series/parallel.
In the present embodiment, the electric resistance measuring apparatus Rg can be used for measuring magnetic field strength, stress value and temperature value.
In a particular embodiment, the electric resistance measuring apparatus Rg is foil gauge, and replaceable is using different grades of
Differently strained of function resistance value.For example, the foil gauge is resistance strain plate and can be attached at measured object
Rigid material on, to improve accuracy.
Understandable, present embodiment foil gauge can be made of sensitive grid etc., used and made based on strain effect,
When the conductor or semiconductor material of present embodiment foil gauge generate mechanically deform under the action of external force, resistance value is corresponding
Change.
As shown in Fig. 2, bridge circuit described in present embodiment can also include measured value reading device G, can be used to
The first end of survey measurements signal, the measured value reading device G is connected between the first resistor R1 and second resistance R2
The first node of formation, the second end of the measured value reading device G are connected to the electric resistance measuring apparatus Rg and can be changed with described
The second node formed between resistor Rx.
In the present embodiment, the bridge circuit can also include measuring bridge excitation power supply Vin, measuring bridge excitation
One end of power supply Vin is connected between the first resistor R1 and the electric resistance measuring apparatus Rg, the other end is connected to described
Between two resistance R2 and the variable resistance Rx, for being provided to first electric bridge being arranged in parallel and second electric bridge
Power input.
In a particular embodiment, the preferably described variable resistance Rx is electric adjustable resistor, the bridge circuit
It can also include control signal input Ctrl, be electrically connected with the electric adjustable resistor, for providing the electricity of voltage or pulse
Signal, to control the target resistance values of the variable resistance Rx.
It should be noted that bridge circuit described in present embodiment can be used for 1/4 bridge strain measurement or the strain of 1/2 bridge is surveyed
Amount, uses following adjusting measurement process:
Connection electric resistance measuring apparatus Rg enters Wheatstone bridge, and not applying on object to be measured any can generate material strain
Load；
The reading of control survey value reading device G, if it is non-zero, the adjusting of control signal input Ctrl output signal can
The resistance value of variohm Rx, until the reading of measured value reading device G is zero；
Start strain measurement after the bridge balance that the reading of measured value reading device G is zero.
In a specific embodiment, it is to be understood that since the rigid material stress of object to be measured generates deformation, from
And the resistance value of resistance strain plate is made to change, so generating voltage difference in Huygens's electric bridge, this voltage difference is passed through into A/D
After conversion chip converts analog signals into digital signal, it can actively read this digital quantity using Micro-processor MCV.
The application can also provide a kind of multi-grade measuring device, and the multi-grade measuring device uses any above-mentioned reality
Apply the bridge circuit described in mode for measurement.
Specifically, the bridge circuit for measurement includes the first electric bridge and the second electric bridge.
As previously mentioned, first resistor R1 and second resistance R2 can be arranged in series on first electric bridge；Described second
Electric bridge is arranged in parallel with first electric bridge, has been arranged in series electric resistance measuring apparatus Rg and variable resistance on second electric bridge
Rx, the variable resistance Rx are electric adjustable resistor, for controlling the target electricity of the variable resistance Rx according to electric signal
Resistance value, realization match with the different grades of function resistance value of the electric resistance measuring apparatus Rg, corresponding to realize to different measurements pair
The measurement of elephant.
In the present embodiment, the first resistor R1 and second resistance R2 can be equivalent resistance, i.e., it in form may be used
Equivalent first resistor R1 and second resistance R2 are formed to connect using multiple resistance.
In the present embodiment, the electric resistance measuring apparatus Rg can be used for measuring magnetic field strength, stress value and temperature value.
In a particular embodiment, the electric resistance measuring apparatus Rg is foil gauge, and replaceable is using different grades of
Differently strained of function resistance value.For example, the foil gauge is resistance strain plate and can be attached at measured object
Rigid material on, to improve accuracy.
Understandable, present embodiment foil gauge can be made of sensitive grid etc., used and made based on strain effect,
When the conductor or semiconductor material of present embodiment foil gauge generate mechanically deform under the action of external force, resistance value is corresponding
Change.
As shown in Fig. 2, bridge circuit described in present embodiment can also include measured value reading device G, can be used to
The first end of survey measurements signal, the measured value reading device G is connected between the first resistor R1 and second resistance R2
The first node of formation, the second end of the measured value reading device G are connected to the electric resistance measuring apparatus Rg and can be changed with described
The second node formed between resistor Rx.
In the present embodiment, the bridge circuit can also include measuring bridge excitation power supply Vin, measuring bridge excitation
One end of power supply Vin is connected between the first resistor R1 and the electric resistance measuring apparatus Rg, the other end is connected to described
Between two resistance R2 and the variable resistance Rx, for being provided to first electric bridge being arranged in parallel and second electric bridge
Power input.
In a particular embodiment, the preferably described variable resistance Rx is electric adjustable resistor, the bridge circuit
It can also include control signal input Ctrl, be electrically connected with the electric adjustable resistor, for providing the electricity of voltage or pulse
Signal, to control the target resistance values of the variable resistance Rx.
It should be noted that bridge circuit described in present embodiment can be used for 1/4 bridge strain measurement or the strain of 1/2 bridge is surveyed
Amount, uses following adjusting measurement process:
Connection electric resistance measuring apparatus Rg enters Wheatstone bridge, and not applying on object to be measured any can generate material strain
Load；
The reading of control survey value reading device G, if it is non-zero, the adjusting of control signal input Ctrl output signal can
The resistance value of variohm Rx, until the reading of measured value reading device G is zero；
Start strain measurement after the bridge balance that the reading of measured value reading device G is zero.
In a specific embodiment, it is to be understood that since the rigid material stress of object to be measured generates deformation, from
And the resistance value of resistance strain plate is made to change, so generating voltage difference in Huygens's electric bridge, this voltage difference is passed through into A/D
After conversion chip converts analog signals into digital signal, it can actively read this digital quantity using Micro-processor MCV.
The application can use the resistance value of different grades according to different measurement objects, manufacture without redesigning
The applicability of different electric resistance measuring apparatus, the application is wider, user-friendly.
Above is only an example of the present application, it is not intended to limit the scope of the patents of the application, it is all to utilize this Shen
Please equivalent structure or equivalent flow shift made by specification and accompanying drawing content, be applied directly or indirectly in other relevant skills
Art field similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of bridge circuit for measurement, which is characterized in that the bridge circuit includes:
First electric bridge has been arranged in series first resistor and second resistance on first electric bridge；
Second electric bridge is arranged in parallel with first electric bridge, and electric resistance measuring apparatus and can has been arranged in series on second electric bridge
Variohm, the variable resistance is electric adjustable resistor, for controlling the target of the variable resistance according to electric signal
Resistance value, realization match with the different grades of function resistance value of the electric resistance measuring apparatus, corresponding to realize to different measurements pair
The measurement of elephant.
2. bridge circuit according to claim 1, which is characterized in that the resistance of the first resistor and the second resistance
It is worth adjustable.
3. bridge circuit according to claim 1 or 2, which is characterized in that the electric resistance measuring apparatus is for measuring magnetic field
Intensity, stress value and temperature value.
4. bridge circuit according to claim 3, which is characterized in that the bridge circuit further include:
The first end of measured value reading device, the measured value reading device is connected between the first resistor and second resistance
The second end of the first node of formation, the measured value reading device is connected to the electric resistance measuring apparatus and the variable resistance
The second node formed between device.
5. bridge circuit according to claim 3, which is characterized in that the bridge circuit further include:
Measuring bridge excitation power supply, one end of measuring bridge excitation power supply are connected to the first resistor and resistance measurement dress
Between setting, the other end be connected between the second resistance and the variable resistance, for described first be arranged in parallel
Electric bridge and second electric bridge provide power input.
6. bridge circuit according to claim 3, which is characterized in that the variable resistance is electric adjustable resistor, institute
State bridge circuit further include:
Control signal input is electrically connected, for providing the electric signal of voltage or pulse, with control with the electric adjustable resistor
The target resistance values of the variable resistance.
7. bridge circuit according to claim 3, which is characterized in that the electric resistance measuring apparatus is foil gauge, and removable
Change differently strained using different grades of function resistance value.
8. bridge circuit according to claim 7, which is characterized in that the bridge circuit can be used for 1/4 bridge strain measurement
Or 1/2 bridge strain measurement.
9. bridge circuit according to claim 7, which is characterized in that the foil gauge is resistance strain plate and can be sticked
In be measured object rigid material on, to improve accuracy.
10. a kind of multi-grade measuring device, which is characterized in that the multi-grade measuring device is using -9 according to claim 1
Bridge circuit described in one for measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810674068.6A CN108957136A (en) | 2018-06-27 | 2018-06-27 | Multi-grade measuring device and its bridge circuit for measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810674068.6A CN108957136A (en) | 2018-06-27 | 2018-06-27 | Multi-grade measuring device and its bridge circuit for measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108957136A true CN108957136A (en) | 2018-12-07 |
Family
ID=64487115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810674068.6A Pending CN108957136A (en) | 2018-06-27 | 2018-06-27 | Multi-grade measuring device and its bridge circuit for measurement |
Country Status (1)
| Country | Link |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995517A (en) * | 2010-10-25 | 2011-03-30 | 宁波大学 | Instrument and method for measuring static resistance and dynamic change resistance of material |
| CN102103193A (en) * | 2010-12-16 | 2011-06-22 | 福建水口发电集团有限公司 | Device and method for measuring magnetic induction intensity based on colossal magnetoresistance effect |
| CN102621508A (en) * | 2012-04-24 | 2012-08-01 | 郭敏强 | Novel method for measuring magnetostriction coefficient |
| CN103105124A (en) * | 2013-01-15 | 2013-05-15 | 南京航空航天大学 | Strain foil and method of full-bridge type and half-bridge type measurement shearing strain |
| CN202948043U (en) * | 2012-10-15 | 2013-05-22 | 山东轻工业学院 | Open type Wheatstone bridge experimental instrument |
| US9322887B1 (en) * | 2014-12-01 | 2016-04-26 | Allegro Microsystems, Llc | Magnetic field sensor with magnetoresistance elements and conductive-trace magnetic source |
| US20160180117A1 (en) * | 2014-12-22 | 2016-06-23 | International Business Machines Corporation | Electronic data security apparatus |
| CN206684185U (en) * | 2017-01-18 | 2017-11-28 | 中国科学院深圳先进技术研究院 | Thermoelectricity detecting system |
-
2018
- 2018-06-27 CN CN201810674068.6A patent/CN108957136A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995517A (en) * | 2010-10-25 | 2011-03-30 | 宁波大学 | Instrument and method for measuring static resistance and dynamic change resistance of material |
| CN102103193A (en) * | 2010-12-16 | 2011-06-22 | 福建水口发电集团有限公司 | Device and method for measuring magnetic induction intensity based on colossal magnetoresistance effect |
| CN102621508A (en) * | 2012-04-24 | 2012-08-01 | 郭敏强 | Novel method for measuring magnetostriction coefficient |
| CN202948043U (en) * | 2012-10-15 | 2013-05-22 | 山东轻工业学院 | Open type Wheatstone bridge experimental instrument |
| CN103105124A (en) * | 2013-01-15 | 2013-05-15 | 南京航空航天大学 | Strain foil and method of full-bridge type and half-bridge type measurement shearing strain |
| US9322887B1 (en) * | 2014-12-01 | 2016-04-26 | Allegro Microsystems, Llc | Magnetic field sensor with magnetoresistance elements and conductive-trace magnetic source |
| US20160180117A1 (en) * | 2014-12-22 | 2016-06-23 | International Business Machines Corporation | Electronic data security apparatus |
| CN206684185U (en) * | 2017-01-18 | 2017-11-28 | 中国科学院深圳先进技术研究院 | Thermoelectricity detecting system |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |
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| RJ01 | Rejection of invention patent application after publication |