CN204613303U - A kind of small-sized electric impedance analyzer - Google Patents
A kind of small-sized electric impedance analyzer Download PDFInfo
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- CN204613303U CN204613303U CN201520369821.2U CN201520369821U CN204613303U CN 204613303 U CN204613303 U CN 204613303U CN 201520369821 U CN201520369821 U CN 201520369821U CN 204613303 U CN204613303 U CN 204613303U
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- modular converter
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Abstract
The utility model discloses a kind of small-sized electric impedance analyzer, comprise display control unit, main control chip, A/D modular converter, FPGA module, D/A modular converter, low-pass filter, voltage follower, I/V modular converter, real effective DC conversion modules, phase detector, described main control chip respectively with described display control unit, A/D modular converter, FPGA module connects, described D/A modular converter respectively with described FPGA module, low-pass filter, phase detector connects, described voltage follower respectively with described low-pass filter, real effective DC conversion modules connects, described I/V modular converter respectively with described real effective DC conversion modules, phase detector connects, described A/D modular converter respectively with described real effective DC conversion modules, phase detector connects.Its beneficial effect is: simple operation, with low cost, error is little.
Description
Technical field
The utility model relates to a kind of small-sized electric impedance analyzer.
Background technology
Impedance is one of Important Parameters describing network and system, and for one-port network, impedance is defined as the voltage vector be added on port
with the same frequency current vector flowing to port
ratio.Electric impedance analyzer all has been widely used in scientific research and actual production, such as sensor test, earphone test, biological study etc.It is lower that normally used RLC shows frequency resolution, can only measure on single or a few Frequency point, comprehensively cannot reflect the frequency characteristic of impedance to be measured, although existing electric impedance analyzer can realize the accurate measurement of impedance at multi-frequency point, but fetch long price, and inapplicable with individual or amateurish purposes.Therefore need for a kind of small-sized electric impedance analyzer of less demanding occasion design, make it have and can measure the modulus of impedance of one-port network, angle of impedance, resistance, reactance in assigned frequency, and draw out the function of above-mentioned four parameter frequency response curves at assigned frequency band, and there is certain precision.
Utility model content
Problem to be solved in the utility model is to provide a kind of simple operation, the small-sized electric impedance analyzer that with low cost, error is little.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of small-sized electric impedance analyzer, it is characterized in that, comprise display control unit, main control chip, A/D modular converter, FPGA module, D/A modular converter, low-pass filter, voltage follower, I/V modular converter, real effective DC conversion modules, phase detector, described main control chip respectively with described display control unit, A/D modular converter, FPGA module connects, described D/A modular converter respectively with described FPGA module, low-pass filter, phase detector connects, described voltage follower respectively with described low-pass filter, real effective DC conversion modules connects, described I/V modular converter respectively with described real effective DC conversion modules, phase detector connects, described A/D modular converter respectively with described real effective DC conversion modules, phase detector connects.
Preferably, above-mentioned small-sized electric impedance analyzer, wherein said main control chip adopts STM32 chip.
Preferably, above-mentioned small-sized electric impedance analyzer, wherein said display control unit is touch LCD display.
Technique effect of the present utility model is mainly reflected in: FPGA module and D/A modular converter, low-pass filter joint mapping two-way orthogonal sine signal source, produces amplitude, frequency, 0 ~ 2MHz ac sweep signal that swept frequency range is adjustable; Use same frequently orthogonal sinusoidal signal as with reference to source, effectively solve the two-value decision problem in phase demodulation, nonlinear problem; By STM32 as main control chip, can in measurement range automatic switching range, the each parameter of one-port network to be measured can be measured in the Frequency point of specifying or frequency band, and frequency characteristic is drawn out on display control unit, survey frequency scope 0 ~ 2MHz, impedance measurement scope 50 ~ 50K Ω, relative error is less than 5%, phase difference measurement scope-90 ° ~ 90 °, absolute error is less than 2 °; Phase demodulation module realizes the measurement of the phase differential (angle of impedance) to voltage and electric current, and calculates resistive component and reactive component with this; And compared with the electric impedance analyzer common with current market, this electric impedance analyzer has simple operation, advantage with low cost.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of phase detector;
Fig. 3 is the circuit theory diagrams of I/V modular converter.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As Fig. 1, 2, shown in 3, a kind of small-sized electric impedance analyzer, comprise display control unit, main control chip, A/D modular converter, FPGA module, D/A modular converter, low-pass filter, voltage follower, I/V modular converter, real effective DC conversion modules, phase detector, main control chip respectively with display control unit, A/D modular converter, FPGA module connects, D/A modular converter respectively with FPGA module, low-pass filter, phase detector connects, voltage follower respectively with low-pass filter, real effective DC conversion modules connects, I/V modular converter respectively with real effective DC conversion modules, phase detector connects, A/D modular converter respectively with real effective DC conversion modules, phase detector connects.During work, impedance to be measured is connected with voltage follower, I/V modular converter respectively.
Wherein main control chip adopts STM32 chip, and display control unit is touch LCD display, can realize the real-time display etc. of the setting to system operating mode, corresponding measured value.
FPGA module in the utility model and D/A modular converter, low-pass filter joint mapping two-way orthogonal sine signal source, produce amplitude, frequency, 0 ~ 2MHz ac sweep signal that swept frequency range is adjustable; Use same frequently orthogonal sinusoidal signal as with reference to source, effectively solve the two-value decision problem in phase demodulation, nonlinear problem; By STM32 as main control chip, can in measurement range automatic switching range, the each parameter of one-port network to be measured can be measured in the Frequency point of specifying or frequency band, and frequency characteristic is drawn out on display control unit, survey frequency scope 0 ~ 2MHz, impedance measurement scope 50 ~ 50K Ω, relative error is less than 5%, phase difference measurement scope-90 ° ~ 90 °, absolute error is less than 2 °; Phase demodulation module realizes the measurement of the phase differential (angle of impedance) to voltage and electric current, and calculates resistive component and reactive component with this; And compared with the electric impedance analyzer common with current market, this electric impedance analyzer has simple operation, advantage with low cost.
Embodiment recited above is only be described preferred implementation of the present utility model, not limits design of the present utility model and scope.Under the prerequisite not departing from the utility model design concept; the various modification that this area ordinary person makes the technical solution of the utility model and improvement; protection domain of the present utility model all should be dropped into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (3)
1. a small-sized electric impedance analyzer, it is characterized in that: comprise display control unit, main control chip, A/D modular converter, FPGA module, D/A modular converter, low-pass filter, voltage follower, I/V modular converter, real effective DC conversion modules, phase detector, described main control chip respectively with described display control unit, A/D modular converter, FPGA module connects, described D/A modular converter respectively with described FPGA module, low-pass filter, phase detector connects, described voltage follower respectively with described low-pass filter, real effective DC conversion modules connects, described I/V modular converter respectively with described real effective DC conversion modules, phase detector connects, described A/D modular converter respectively with described real effective DC conversion modules, phase detector connects.
2. small-sized electric impedance analyzer according to claim 1, is characterized in that: described main control chip adopts STM32 chip.
3. small-sized electric impedance analyzer according to claim 1, is characterized in that: described display control unit is touch LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369821.2U CN204613303U (en) | 2015-06-02 | 2015-06-02 | A kind of small-sized electric impedance analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369821.2U CN204613303U (en) | 2015-06-02 | 2015-06-02 | A kind of small-sized electric impedance analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204613303U true CN204613303U (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520369821.2U Expired - Fee Related CN204613303U (en) | 2015-06-02 | 2015-06-02 | A kind of small-sized electric impedance analyzer |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541315A (en) * | 2018-12-07 | 2019-03-29 | 桂林电子科技大学 | A kind of portable mono port vector impedance analyzer |
| CN109581067A (en) * | 2018-11-09 | 2019-04-05 | 电子科技大学 | A kind of capacitance measuring device based on FPGA speed receiver |
| TWI669513B (en) * | 2018-07-18 | 2019-08-21 | 宏碁股份有限公司 | Electronic device and control method thereof |
-
2015
- 2015-06-02 CN CN201520369821.2U patent/CN204613303U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI669513B (en) * | 2018-07-18 | 2019-08-21 | 宏碁股份有限公司 | Electronic device and control method thereof |
| CN109581067A (en) * | 2018-11-09 | 2019-04-05 | 电子科技大学 | A kind of capacitance measuring device based on FPGA speed receiver |
| CN109541315A (en) * | 2018-12-07 | 2019-03-29 | 桂林电子科技大学 | A kind of portable mono port vector impedance analyzer |
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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: 20150902 Termination date: 20160602 |