CN204142837U - Portable online resistance conductance detector - Google Patents
Portable online resistance conductance detector Download PDFInfo
- Publication number
- CN204142837U CN204142837U CN201420654151.4U CN201420654151U CN204142837U CN 204142837 U CN204142837 U CN 204142837U CN 201420654151 U CN201420654151 U CN 201420654151U CN 204142837 U CN204142837 U CN 204142837U
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- resistance
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- voltage
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of portable online resistance conductance detector.Its standard of precision voltage is connected with current source through programmable power supply, current source is connected with sample again, sample utilizes four line technologies to be connected with lock-in amplifier, lock-in amplifier is connected with programmable amplifier, and then programmable amplifier is connected with low-pass filter, and low-pass filter is connected with A/D, thus Accurate Measurement goes out the voltage of target to be measured, last A/D is connected with LED display by microcontroller, obtains accurate resistance through computing, then shows all data.Because the utility model have employed current method, utilize full Chinese display and full touch operation system, backlight multiparameter can show all data, state and operation indicating simultaneously, have the auto-compensation of pure water, output current and mode arrange with check, the function of history curve and digital recording, function uniqueness is perfect, reliable and stable, and resistance measurement is accurate, and menu structure is easy, alleviate the labour intensity of operator.
Description
Technical field: the utility model relates to and is a kind ofly applied to the solids such as thermoelectricity, chemical industry chemical fertilizer, metallurgy, environmental protection, pharmacy, biochemistry, food and tap water, the accurate measurement of solution resistance rate value and the continuous portable online resistance conductance detector that uses of monitoring.
Background technology: along with the fast development of economy, people have focused on timeliness and the Accurate Measurement function of the equipment used in all trades and professions more.And the online resistance used now (leading) rate detector, be use general electronic circuit mostly, the Dynamic Announce time is slow, and function singleness, adds the labour intensity of operator, and online resistance conductance detection Numerical accuracy is not high.
Utility model content: there are provided a kind of function uniqueness perfect, reliable and stable order of the present utility model, the accurate portable online resistance conductance detector of resistance measurement.
The purpose of this utility model is achieved through the following technical solutions: its standard of precision voltage is connected with current source through programmable power supply, current source is connected with sample again, the electric current formed is put on sample, sample utilizes four line technologies to be connected with lock-in amplifier, lock-in amplifier is connected with programmable amplifier, the error that lead resistance is brought can be reduced, namely the electric current of two lead-in wire generations passes through measured resistance, the pressure drop at another two test resistance two ends that independently go between, consequent very little voltage is extracted from noise by lock-in amplifier subsequently, put on programmable amplifier, then programmable amplifier is connected with low-pass filter, suppress the outer frequency of all bands, and allow echo signal pass through, low-pass filter is connected with A/D, thus Accurate Measurement goes out the voltage of target to be measured, last A/D is connected with LED display by microcontroller, accurate resistance is obtained through computing, show all data again.
The beneficial effects of the utility model are: owing to have employed intelligent microprocessor, full Chinese display, full touch operation system, can backlight multiparameter show simultaneously, have the auto-compensation of pure water, output current and mode arrange with check, the function of history curve and digital recording, function uniqueness is perfect, reliable and stable, and resistance measurement is accurate, and menu structure is easy, alleviate the labour intensity of operator.
Accompanying drawing illustrates: Fig. 1 is anatomical connectivity schematic diagram of the present utility model
Embodiment: as shown in Figure 1, its standard of precision voltage is connected with current source through programmable power supply, current source is connected with sample again, the electric current formed is put on sample, sample utilizes four line technologies to be connected with lock-in amplifier, lock-in amplifier is connected with programmable amplifier, the error that lead resistance is brought can be reduced, namely the electric current of two lead-in wire generations passes through measured resistance, the pressure drop at another two test resistance two ends that independently go between, consequent very little voltage is extracted from noise by lock-in amplifier subsequently, put on programmable amplifier, then programmable amplifier is connected with low-pass filter, suppress the outer frequency of all bands, and allow echo signal pass through, low-pass filter is connected with A/D, thus Accurate Measurement goes out the voltage of target to be measured, last A/D is connected with LED display by microcontroller, accurate resistance is obtained through computing, show all data again.
As shown in Figure 1, described standard of precision voltage is connected with A/D.
As shown in Figure 1, described microcontroller is connected with SD card, power management respectively, and USB interface is connected to microcontroller and power management junction.
As shown in Figure 1, the size of described testing resistance can be configured to × 1, × 10, × 100 or × 1000.
Principle of work of the present utility model is: this surveying instrument adopts current method, electric current from accurate reference current source is put on sample, utilize the error that four line technologies minimizing lead resistances are brought, namely the electric current of two lead-in wire generations passes through measured resistance, the pressure drop at another two test resistance two ends that independently go between, consequent very little voltage is extracted from noise by lock-in amplifier subsequently, put on software programmable gain amplifier, its gain can be × 1 or × 1000 according to the size configure of testing resistance, and gain drift is all very low, thus system-gain is extremely stable in whole temperature range, then, an active low-pass filter suppresses the outer frequency of all bands, and allow echo signal pass through, the voltage of target to be measured is gone out again by 24 ADC Accurate Measurements, accurate resistance is obtained through computing.
Claims (4)
1. a portable online resistance conductance detector, it is characterized in that standard of precision voltage is connected with current source through programmable power supply, current source is connected with sample again, the electric current formed is put on sample, sample utilizes four line technologies to be connected with lock-in amplifier, lock-in amplifier is connected with programmable amplifier, the error that lead resistance is brought can be reduced, namely the electric current of two lead-in wire generations passes through measured resistance, the pressure drop at another two test resistance two ends that independently go between, consequent very little voltage is extracted from noise by lock-in amplifier subsequently, put on programmable amplifier, then programmable amplifier is connected with low-pass filter, suppress the outer frequency of all bands, and allow echo signal pass through, low-pass filter is connected with A/D, thus Accurate Measurement goes out the voltage of target to be measured, last A/D is connected with LED display by microcontroller, accurate resistance is obtained through computing, show all data again.
2. portable online resistance conductance detector according to claim 1, is characterized in that described standard of precision voltage is connected with A/D.
3. portable online resistance conductance detector according to claim 1, it is characterized in that described microcontroller is connected with SD card, power management respectively, USB interface is connected to microcontroller and power management junction.
4. portable online resistance conductance detector according to claim 1, it is characterized in that the size of described testing resistance can be configured to × 1, × 10, × 100 or × 1000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420654151.4U CN204142837U (en) | 2014-10-31 | 2014-10-31 | Portable online resistance conductance detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420654151.4U CN204142837U (en) | 2014-10-31 | 2014-10-31 | Portable online resistance conductance detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204142837U true CN204142837U (en) | 2015-02-04 |
Family
ID=52419517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420654151.4U Expired - Fee Related CN204142837U (en) | 2014-10-31 | 2014-10-31 | Portable online resistance conductance detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204142837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445293A (en) * | 2018-05-29 | 2018-08-24 | 合肥本源量子计算科技有限责任公司 | A kind of quantum chip port impedance test device and measurement method |
-
2014
- 2014-10-31 CN CN201420654151.4U patent/CN204142837U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445293A (en) * | 2018-05-29 | 2018-08-24 | 合肥本源量子计算科技有限责任公司 | A kind of quantum chip port impedance test device and measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20161031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |