CN202502155U - High resistance measurement device - Google Patents
High resistance measurement device Download PDFInfo
- Publication number
- CN202502155U CN202502155U CN2011205595049U CN201120559504U CN202502155U CN 202502155 U CN202502155 U CN 202502155U CN 2011205595049 U CN2011205595049 U CN 2011205595049U CN 201120559504 U CN201120559504 U CN 201120559504U CN 202502155 U CN202502155 U CN 202502155U
- Authority
- CN
- China
- Prior art keywords
- resistance
- measurement
- operational amplifier
- communication interface
- serial communication
- 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 - Fee Related
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a high resistance measurement device. The measurement device comprises a measurement module, an A/D conversion module, a single chip microcomputer and a serial communication interface module which are connected successively. The serial communication interface module is connected with a computer. The measurement module is made up of a charge and discharge measurement circuit, a bleeder circuit and an operational amplifier which are connected together, wherein the output end of the operational amplifier is connected with the input end of the A/D conversion module. According to the utility model, the single chip microcomputer and digital circuit technologies are adopted, an analog voltage on a capacitor is acquired, analog-to-digital conversion is performed on the analog voltage, the digital voltage is transferred to the computer or a handheld device, such as a PDA, etc., through the serial communication interface under the control of the single chip microcomputer, and the digital voltage is processed by the computer, then a measurement result is generated. Thus, manual operations are reduced, speed and accuracy of measurements are improved, and full automation is realized in high resistance measurements.
Description
Technical field
The utility model relates to the instrument of measuring resistance, relates in particular to a kind of measurement mechanism that is used to measure high resistant.
Background technology
According to the difference of specific insulation, the way of current measuring resistor is divided into two kinds usually: a kind of is when resistivity＜10
8During Ω cm, use common intelligent digital multimeter to get final product; Another kind is when resistivity＞10
8During Ω cm, need to use the high resistant appearance to test.
High resistant as the term suggests be exactly the very high resistance of resistance, is often referred to 10
6The resistance that Ω is above, 10
8～10
17The resistance of Ω generally is referred to as the superelevation resistance.Because resistance value is higher, the instrument of general measure resistance receives the restriction of range and sensitivity, and directly being used to measure high resistant has certain difficulty.High resistant exists widely and uses at present, for example various semiconductive objects, various common insulator, and its resistance is all very high, and 8 powers from 10 expand to 10 18 powers always.Conductive characteristic, insulation characterisitic in order to test various materials just must set foot in the high resistant field.The measurement result of existing high resistance meter all is to be read by survey crew, has error easily, and exists not enough on the data processing speed.
Summary of the invention
The purpose of the utility model provides a kind of high resistance measurement device accurate, that automaticity is high of measuring.
To achieve these goals, the utility model is taked following technical solution:
The high resistance measurement device comprises the measurement module, A/D modular converter, single-chip microcomputer and the serial communication interface module that connect successively, and this serial communication interface module links to each other with computing machine; Measurement module connects and composes by discharging and recharging metering circuit, bleeder circuit and operational amplifier, and the output terminal of operational amplifier is connected with the input end of A/D modular converter.
The metering circuit that discharges and recharges of the utility model is formed by power supply, switch and capacitances in series, and testing resistance is parallelly connected with said electric capacity, the other end and the ground connection of an end of said testing resistance one termination capacitor and bleeder circuit, another termination capacitor.
The bleeder circuit of the utility model comprises first resistance and second resistance, an end of first resistance with discharge and recharge that metering circuit is connected, an end of another termination second resistance and the in-phase input end of operational amplifier, the other end ground connection of second resistance.
Know that by above the utility model utilizes single-chip microcomputer and digital circuit technique, with the analog voltage that collects on the electric capacity; After carrying out analog to digital conversion; Under the control of single-chip microcomputer, send handheld devices such as computing machine or PDA to through serial communication interface, by providing measurement result after the Computer Processing.Thereby the minimizing manually-operated has improved measured speed and degree of accuracy, makes to measure high resistant realization full-automation.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model;
Fig. 2 is the circuit diagram that the utility model discharges and recharges metering circuit.
Below in conjunction with accompanying drawing the embodiment of the utility model is done explanation in further detail.
Embodiment
As shown in Figure 1, the measurement mechanism of the utility model comprises measurement module 1, A/D modular converter 2, single-chip microcomputer 3 and the serial communication interface module 4 that connects successively.Simultaneously with reference to Fig. 2; Measurement module 1 comprises that discharging and recharging metering circuit, bleeder circuit and operational amplifier U1A constitutes; Wherein discharge and recharge metering circuit and connected and composed by power supply 10, switch 11, capacitor C 1 and testing resistance, power supply 10 is connected with switch 11 and capacitor C 1, and testing resistance R is parallelly connected with capacitor C 1; An end and the bleeder circuit of testing resistance R one termination capacitor C1, the other end and the ground connection of another termination capacitor C 1 of electricity group R to be measured.With testing resistance R and capacitor C 1 composition loop; Let power supply 10 give capacitor C 1 charging earlier through CS during measurement; After charging is accomplished; Let capacitor C 1 through testing resistance R discharge again, the electric weight of when capacitor C 1 discharge, measuring on the capacitor C 1 (or voltage) concerns over time, thereby measures the resistance of testing resistance R.
The end that bleeder circuit comprises first resistance R 1 and second resistance R, 2, the first resistance R 1 with discharge and recharge that metering circuit is connected, an end of another termination second resistance R 2 and the in-phase input end of operational amplifier U1A, the other end ground connection of second resistance R 2.Divider resistance plays a part voltage follow, takes electric resistance partial pressure, can protect the circuit chip of back, prevents to be burnt out because of overtension.The inverting input of operational amplifier U1A connects the output terminal of operational amplifier U1A, and the output terminal of operational amplifier U1A is connected with A/D modular converter 2 input ends.It is the dyadic operation amplifier of TLC27L2 that operational amplifier in the present embodiment adopts model, and it is the analog to digital converter of ADC0809 that A/D modular converter 2 adopts model.
The output terminal of A/D modular converter 2 is connected with single-chip microcomputer 3, and single-chip microcomputer 3 is connected with computing machine through serial communication interface module 4, and the model of the single-chip microcomputer of present embodiment is 89C51, and the serial communication interface module adopts the MAX232 chip.During measurement,, carry out analog to digital conversion, under the control of single-chip microcomputer 3, send into computing machine, by drawing measurement result after the Computer Processing through serial communication interface module 4 through A/D modular converter 2 with the aanalogvoltage that collects on the capacitor C 1.
Certainly; Above embodiment only in order to the explanation the utility model technical scheme but not to its restriction; Although with reference to the foregoing description the utility model has been carried out detailed explanation, the those of ordinary skill in affiliated field should be appreciated that still and can make amendment or be equal to replacement the embodiment of the utility model; And do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed among the claim scope of the utility model.
Claims (3)
1. high resistance measurement device is characterized in that: comprise the measurement module, A/D modular converter, single-chip microcomputer and the serial communication interface module that connect successively, said serial communication interface module links to each other with computing machine;
Said measurement module connects and composes by discharging and recharging metering circuit, bleeder circuit and operational amplifier, and the output terminal of said operational amplifier is connected with the input end of said A/D modular converter.
2. high resistance measurement device according to claim 1; It is characterized in that: the said metering circuit that discharges and recharges is formed by power supply, switch and capacitances in series; Testing resistance is parallelly connected with said electric capacity, the other end and the ground connection of an end of said testing resistance one termination capacitor and bleeder circuit, another termination capacitor.
3. high resistance measurement device according to claim 1; It is characterized in that: said bleeder circuit comprises first resistance and second resistance; One end of first resistance with discharge and recharge that metering circuit is connected, an end of another termination second resistance and the in-phase input end of operational amplifier, the other end ground connection of second resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205595049U CN202502155U (en) | 2011-12-21 | 2011-12-21 | High resistance measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205595049U CN202502155U (en) | 2011-12-21 | 2011-12-21 | High resistance measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202502155U true CN202502155U (en) | 2012-10-24 |
Family
ID=47038765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205595049U Expired - Fee Related CN202502155U (en) | 2011-12-21 | 2011-12-21 | High resistance measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202502155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117607546A (en) * | 2024-01-24 | 2024-02-27 | 合肥巨阙电子有限公司 | Multi-channel high-speed high-resistance measurement system and measurement method |
-
2011
- 2011-12-21 CN CN2011205595049U patent/CN202502155U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117607546A (en) * | 2024-01-24 | 2024-02-27 | 合肥巨阙电子有限公司 | Multi-channel high-speed high-resistance measurement system and measurement method |
| CN117607546B (en) * | 2024-01-24 | 2024-04-16 | 合肥巨阙电子有限公司 | Multi-channel high-speed high-resistance measurement system and measurement method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101435838B (en) | Apparatus for measuring capacitance capacity | |
| CN110383573B (en) | Monitoring system for series battery units | |
| CN102590609B (en) | The method of mobile terminal and measurement mobile terminal power consumption | |
| US4103225A (en) | System and method for determining capacitance and cable length in the presence of other circuit elements | |
| CN103033729A (en) | Insulation detection circuit and detection method used for battery box | |
| CN101828123A (en) | Method and device for measuring cell voltages in a plurality of series-connected accumulator cells | |
| CN109901082A (en) | Portable electric energy system and its measurement method | |
| CN105068016B (en) | Battery capacity display control method and control circuit | |
| CN107543972A (en) | One kind measurement capacitor system and its measuring method | |
| WO2019109951A1 (en) | Portable electric energy system, and measurement method for remaining electric quantity of battery pack | |
| CN103440073B (en) | Get rid of the capacitance sensing circuit of effect of parasitic capacitance | |
| CN106569005A (en) | Electric vehicle battery current accuracy test method | |
| CN102768078B (en) | Automatic resistance compensation method for temperature-measuring conductors for two-wire thermal resistor | |
| CN202502155U (en) | High resistance measurement device | |
| CN102081150B (en) | 'Virtual complex impedance method'-based power frequency line parameter tester calibration device and method | |
| CN112180176A (en) | Capacitance value measuring circuit and method based on constant current source | |
| CN204925248U (en) | Measure circuit of adjustable resistance resistance | |
| CN214067270U (en) | Capacitance value measuring circuit based on constant current source | |
| CN109904903A (en) | Power supply device and charging method | |
| CN109921499A (en) | Power supply device and speed regulating method for fan in power supply device | |
| CN104897964A (en) | Circuit and method for measuring resistance of variable resistor | |
| CN112557915B (en) | Electric quantity detection circuit, electric quantity detection method and electronic equipment | |
| CN201011520Y (en) | Three-phase electric energy meter | |
| CN115047229A (en) | A high accuracy current sampling module for new energy automobile | |
| CN110031774B (en) | Online measurement method and device for internal resistance of battery pack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20131221 |