CN2441144Y - Relative voltage measuring device - Google Patents
Relative voltage measuring device Download PDFInfo
- Publication number
- CN2441144Y CN2441144Y CN 00247426 CN00247426U CN2441144Y CN 2441144 Y CN2441144 Y CN 2441144Y CN 00247426 CN00247426 CN 00247426 CN 00247426 U CN00247426 U CN 00247426U CN 2441144 Y CN2441144 Y CN 2441144Y
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- CN
- China
- Prior art keywords
- relative voltage
- operational amplifier
- differential pressure
- voltage
- voltage measurement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000005259 measurement Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
A relative voltage measuring device is composed of measuring circuit and converting circuit, and features that the converting circuit includes forward operational amplifier, backward operational amplifier, differential pressure resistor and final differential pressure operational amplifier, and it can directly measure the relative voltage between elements in same circuit.
Description
The utility model belongs to measurement mechanism, particularly relates to voltage measuring apparatus.
In measured circuit, to measure the voltage (potential difference (PD)) on a plurality of elements simultaneously, must overcome the influence of current potential on each element, but because the device of existing measuring voltage all is to measure voltage on the discrete component, therefore can not directly measure the voltage on a plurality of elements in use simultaneously, and need to measure each point after convert and to obtain.
The purpose of this utility model provides a kind of relative voltage measurement mechanism, can directly measure the relative voltage on the multicomponent in the same circuit simultaneously.
The purpose of this utility model realizes by the following technical solutions: the voltage of two measured points all is converted into equivalent above earth potential, be that metering circuit is passed through two-way prime operational amplifier realization impedance adjustment, obtain the voltage-to-ground that equates with the input voltage difference by differential pressure resistance and final stage operational amplifier.
The utility model is made up of metering circuit and change-over circuit, and change-over circuit comprises prime forward operation amplifier, prime negative sense operational amplifier, differential pressure resistance, final stage differential pressure operational amplifier.Promptly in the measurement mechanism of former survey voltage, increase prime forward operation amplifier, prime negative sense operational amplifier, differential pressure resistance, final stage differential pressure operational amplifier.
The utlity model has simple in structurely, easy to use, can directly measure the relative voltage on the multicomponent in the same circuit simultaneously, the relative voltage of point-to-point transmission arbitrarily in available this measurement device circuit-under-test.
Below in conjunction with accompanying drawing and with it is that the utility model is described in further detail for embodiment:
Accompanying drawing is an electrical schematic diagram of the present utility model.
IC1A is a prime forward operation amplifier among the figure, and IC1B and R1, R2 form prime negative sense operational amplifier, and R3, R4 form differential pressure resistance, and IC1C and R5, R6 form final stage differential pressure operational amplifier.
Prime forward operation amplifier IC1A connects with R3, and prime negative sense operational amplifier IC1B connects with R4.
Three groups of resistance R 1 and R2, R3 and R4, R5 and R6 in circuit equate respectively in each group, i.e. R1=R2, R3=R4, R5=R6.
If positive input voltage is U1 (3 points among the figure), negative input voltage is U2 (a R1 right-hand member among the figure), and according to the characteristic of operational amplifier: 1 point voltage is U1, and 7 point voltages are-U2.Then 10 voltage is (U1-U2)/2.After IC1C amplified 2 times, 8 points (i.e. output) voltage-to-ground was U1-U2.
Connect the A/D change-over circuit (being former survey potential circuit) of usefulness by 8 points (i.e. output), it reflects is in the actual measurement circuit 2 relative voltage.
The utility model is employed+/-voltage should be equivalent, and its absolute value should be greater than the supply voltage of circuit-under-test.After meeting this condition, the relative voltage of any point-to-point transmission in promptly available this measurement device circuit-under-test.
The employed operational amplifier of the utility model can adopt any existing integrated operational amplifier circuit as required, can adjust the resistance of each resistance as required to obtain different input impedance simultaneously.
Claims (6)
1. a relative voltage measurement mechanism is made up of metering circuit and change-over circuit, it is characterized in that change-over circuit comprises prime forward operation amplifier, prime negative sense operational amplifier, differential pressure resistance, final stage differential pressure operational amplifier.
2. relative voltage measurement mechanism according to claim 1 is characterized in that being is prime forward operation amplifier with IC1A.
3. relative voltage measurement mechanism according to claim 1 is characterized in that IC1B and R1, R2 form prime negative sense operational amplifier.
4. relative voltage measurement mechanism according to claim 1 is characterized in that R3, R4 form differential pressure resistance.
5. relative voltage measurement mechanism according to claim 1 is characterized in that IC1C and R5, R6 form final stage differential pressure operational amplifier.
6. according to claim 3,4 or 5 described relative voltage measurement mechanisms, it is characterized in that R1=R2, R3=R4, R5=R6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00247426 CN2441144Y (en) | 2000-08-25 | 2000-08-25 | Relative voltage measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00247426 CN2441144Y (en) | 2000-08-25 | 2000-08-25 | Relative voltage measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2441144Y true CN2441144Y (en) | 2001-08-01 |
Family
ID=33606373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00247426 Expired - Lifetime CN2441144Y (en) | 2000-08-25 | 2000-08-25 | Relative voltage measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2441144Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426286A (en) * | 2011-09-26 | 2012-04-25 | 中环天仪股份有限公司 | Polarization voltage detection circuit used in electromagnetic flow meter |
| CN103986430A (en) * | 2014-04-15 | 2014-08-13 | 郑州宇通客车股份有限公司 | Analog signal processing circuit for hybrid electric vehicle |
-
2000
- 2000-08-25 CN CN 00247426 patent/CN2441144Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426286A (en) * | 2011-09-26 | 2012-04-25 | 中环天仪股份有限公司 | Polarization voltage detection circuit used in electromagnetic flow meter |
| CN103986430A (en) * | 2014-04-15 | 2014-08-13 | 郑州宇通客车股份有限公司 | Analog signal processing circuit for hybrid electric vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20100825 Granted publication date: 20010801 |