CN204241570U - The proving installation of conductivity and consumer - Google Patents
The proving installation of conductivity and consumer Download PDFInfo
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- CN204241570U CN204241570U CN201420688532.4U CN201420688532U CN204241570U CN 204241570 U CN204241570 U CN 204241570U CN 201420688532 U CN201420688532 U CN 201420688532U CN 204241570 U CN204241570 U CN 204241570U
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Abstract
The utility model provides a kind of proving installation of conductivity and a kind of consumer, and the proving installation of conductivity, comprising: square wave occurring source, produces square-wave signal; First filtering circuit, carries out filtering process to square-wave signal, is not comprised the sinusoidal signal of flip-flop as test voltage; Test electrode unit, comprises the two groups of test electrodes be connected in parallel, and the often group test electrode in two groups of test electrodes and a resistor coupled in parallel, for being applied to medium to be tested by test voltage; Current detection circuit, detection is flow through the current signal of test electrode unit and is converted into voltage signal; On-off circuit, controls the duty of test electrode; Signal processing circuit, determines the conductivity of medium to be tested.The technical solution of the utility model under the prerequisite avoiding test electrode polarized, can be tested the medium of low conductivity exactly, and employing one group of test electrode can be avoided to cause, and test is inconvenient, the inaccurate problem of test result.
Description
Technical field
The utility model relates to conductivity technical field of measurement and test, in particular to a kind of electric conductivity test device and a kind of consumer.
Background technology
Conductivity as one of the key property of material, and simple with its Cleaning Principle, pick-up unit cost is low and be widely used in material classification technology, material analysis techniques, environmental protection technology and commercial production control technology.
In correlation technique, detection for conductivity normally adopts volt-ampere characteristic analysis, particularly, applies voltage signal as pumping signal to test electrode, the current signal of reading flow electrode after tested, according to the conductivity of above-mentioned voltage signal and current signal determination determinand.But, according to d. c. voltage signal as continuous-current excitation signal, the polarization of test electrode can be caused; If directly adopt ac voltage signal as ac-excited signal, then to the amplitude of ac-excited signal and the stability requirement of frequency higher, and can owing to including the polarization that flip-flop causes test electrode in ac-excited signal, the test result of ac-excited signal can not be compatible with digital circuit well simultaneously, therefore can not provide conductivity test result intuitively for user.
Meanwhile, need in some scenarios to test to different media or to the conductivity before and after media processes, as water purifier series products, need the water quality before and after to filter core process to detect respectively.If only adopt one group of test electrode, then need the test position of changed test electrode frequently, cause testing inconvenience, user operation is loaded down with trivial details; And need to clean test electrode, otherwise test result can be caused inaccurate.In addition, when the conductivity of determinand is lower, the high impedance between test electrode can cause test signal less, is not easy to analyze test signal.
Therefore, how under the prerequisite avoiding test electrode polarized, exactly the material of low conductivity can be measured, and employing one group of test electrode can be avoided to cause, and test is inconvenient, test result is inaccurate becomes technical matters urgently to be resolved hurrily.
Utility model content
The utility model is intended at least to solve one of technical matters existed in prior art or correlation technique.
For this reason, an object of the present utility model be to propose a kind of can under the prerequisite avoiding test electrode polarized, exactly the medium of low conductivity is tested, and employing one group of test electrode can be avoided to cause, and test is inconvenient, the proving installation of the inaccurate conductivity of test result.
Another object of the present utility model is to propose a kind of consumer.
For achieving the above object, according to an embodiment of the present utility model, propose a kind of proving installation of conductivity, comprising: square wave occurring source, for generation of square-wave signal; First filtering circuit, is connected to described square wave occurring source, carries out filtering process, do not comprised the sinusoidal signal of flip-flop for the described square-wave signal produced described square wave occurring source, using by described sinusoidal signal as test voltage; Test electrode unit, comprise the two groups of test electrodes be connected in parallel, often group test electrode in described two groups of test electrodes and a resistor coupled in parallel, described test electrode unit is connected to described first filtering circuit, for described test voltage is applied to medium to be tested; Current detection circuit, for detecting the current signal flowing through described test electrode unit, and is converted into corresponding voltage signal by the current signal detected; On-off circuit, is connected between described test electrode unit and described current detection circuit, for controlling the duty often organizing test electrode in described two groups of test electrodes; Signal processing circuit, is connected to described on-off circuit, and the voltage signal for exporting according to described current detection circuit determines the conductivity of described medium to be tested.
According to the proving installation of the conductivity of embodiment of the present utility model, by the first filtering circuit is connected to square wave occurring source, to carry out filtering process to described square-wave signal, final acquisition is not containing the sinusoidal signal of flip-flop, can avoid adopting continuous-current excitation signal in correlation technique, or directly adopt and undressedly include the ac-excited signal of flip-flop and cause polarization of electrode effect; Meanwhile, owing to being the sinusoidal signal by obtaining after carrying out filtering process to square-wave signal, therefore can to ensure to be applied on electrode ac-excited has stable amplitude and frequency, and then can guarantee the accuracy of conductivity test result.
Meanwhile, by a resistance in parallel with test electrode, the current signal strength that current detection circuit detects can be improved, and then can realize measuring the medium of low conductivity.
In addition, by arranging on-off circuit to control often to organize the duty of test electrode, enhance the test diversity of the proving installation of conductivity, namely can by the simple switching of on-off circuit, realize treating tested media by different test electrodes and testing, avoid employing one group of test electrode to different medium or test the conductivity before and after media processes and cause testing inconvenient, that user operation is loaded down with trivial details problem.Particularly, as measured the water quality before and after water purifier process by two groups of test electrodes.Preferably, in two groups of test electrodes, only can there is one group of test electrode work at synchronization, to avoid producing interference between the signal of two groups of test electrode tests.
In addition, the cost of the proving installation of the conductivity that the utility model proposes is lower, be convenient to batch production and the application of the proving installation realizing conductivity, as being applied in water purifier the detection realized water purifier water quality, or the measurement for grading to electrolyte, meat products, grain moisture content, the holard.
In addition, according to the proving installation of the conductivity of above-described embodiment of the present utility model, following additional technical characteristic can also be had:
According to an embodiment of the present utility model, described signal processing circuit, comprising: peak detection circuit, is connected to described current detection circuit, for detecting the peak value of the described voltage signal that described current detection circuit exports; Analog to digital converter, is connected to described peak detection circuit, carries out analog-to-digital conversion process, to obtain digital signal for the peak value detected described peak detection circuit; Microprocessor, is connected to described analog to digital converter, for determining the conductivity of described medium to be tested according to described digital signal.
According to the proving installation of the conductivity of embodiment of the present utility model, by setting gradually peak detection circuit, analog to digital converter and microprocessor in signal processing circuit, can make to test the conductivity value obtained and being compatible with digital circuit.Particularly, by simulating signal is quantified as digital signal, user can be made to check the conductivity of test more intuitively, improve Consumer's Experience.
Wherein, when determining the conductivity of medium to be tested, the voltage peak that can detect according to peak detection circuit calculates the conductance sum of medium to be tested and resistance, then the conductance of testing medium is obtained after deducting the conductance of resistance, and conductance and conductivity proportional, and then according to the parameter determination scale-up factor of test electrode, thus the conductivity of medium to be tested can be obtained.
According to an embodiment of the present utility model, described signal processing circuit, also comprise: the second filtering circuit, described peak detection circuit is connected to described current detection circuit by described second filtering circuit, and described second filtering circuit is used for carrying out filtering and noise reduction process to the described voltage signal that described current detection circuit exports.
According to the proving installation of the conductivity of embodiment of the present utility model, by arranging the second filtering circuit between current detection circuit and peak detection circuit, filtering process is carried out with the voltage signal exported current detection circuit, reduce noise and the fluctuation situation of test signal, and then the accuracy of test result can be ensured.
According to an embodiment of the present utility model, described signal processing circuit, also comprise: the 3rd filtering circuit, described analog to digital converter is connected to described peak detection circuit by described 3rd filtering circuit, and described 3rd filtering circuit is used for carrying out filtering and noise reduction process to the voltage peak signal that described peak detection circuit exports.
According to the proving installation of the conductivity of embodiment of the present utility model, by arranging the 3rd filtering circuit between peak detection circuit and analog to digital converter, filtering process is carried out with the voltage signal exported peak detection circuit, create a further reduction noise and the fluctuation situation of test signal, and then also can ensure the accuracy of test result.
According to an embodiment of the present utility model, described microprocessor comprises described square wave occurring source.
According to the proving installation of the conductivity of embodiment of the present utility model, by square wave occurring source is arranged in described microprocessor, setting parameter and amendment can be carried out by microprocessor to square wave occurring source, if microprocessor is single-chip microcomputer, square-wave signal can be exported by single-chip microcomputer.In addition, adopt square wave occurring source to reduce the holistic cost of the proving installation of conductivity, particularly, square-wave signal is one of signal obtaining sinusoidal signal the most easily, therefore, need not adopt high ground equipment to obtain the sine wave signal without flip-flop.
According to an embodiment of the present utility model, described microprocessor also for: the mode that described square wave occurring source produces described square-wave signal is controlled.Wherein, microprocessor can control square wave occurring source lasting generation square-wave signal, to realize the continuance test treating tested media, as carried out continuance test to the conductivity in water purifier water route; Certainly, microprocessor also can control square wave occurring source and at a time produce square-wave signal, to realize the interruption test treating tested media, namely just tests when needs are tested, as the test etc. to soil moisture, meat products.
According to an embodiment of the present utility model, described microprocessor comprises: decision circuitry, for judging whether the conductivity of the medium described to be tested determined is in default conductivity range; Cue circuit, is connected to described decision circuitry, for when described decision circuitry judges that the conductivity of described medium to be tested is not in described default conductivity range, sends cue.
According to the proving installation of the conductivity of embodiment of the present utility model, by arranging decision circuitry and cue circuit in the microprocessor, can be implemented in after determining conductivity, according to the comparison of conductivity and default conductivity range, determine the state of matter corresponding to conductivity, and by result of determination is prompted to user, makes user obtain state of matter more intuitively, improve Consumer's Experience.
According to an embodiment of the present utility model, described on-off circuit comprises: two switches, and each described switch is connected with test electrode described in a group, and each described switch is for controlling the duty of test electrode described in a group.
According to the proving installation of the conductivity of embodiment of the present utility model, the duty of one group of test electrode is controlled respectively by arranging two switches, can at one time in, select arbitrary group of test electrode to test, the convenient control realized two groups of test electrodes.
According to an embodiment of the present utility model, described microprocessor is also connected to described on-off circuit, closes for controlling each described switch or disconnects, to control the described duty often organizing test electrode.
According to the proving installation of the conductivity of embodiment of the present utility model, by the closure state of each switch of Microprocessor S3C44B0X, achieve the convenient effect controlling the duty of test electrode.
According to an embodiment of the present utility model, described first filtering circuit comprises: the filtering circuit combined by bandpass filter and pi type filter.
According to the proving installation of the conductivity of embodiment of the present utility model, the filtering circuit combined by bandpass filter and pi type filter is as the first filtering circuit, effectively obtain not containing the sinusoidal signal of flip-flop, and then avoid the electrode polarization effect that direct current signal causes; And can guarantee that obtaining sinusoidal signal has stable amplitude and frequency, and then the accuracy of conductivity test result can be guaranteed.
According to an embodiment of the present utility model, described sinusoidal signal is the sinusoidal signal with single waveform, or superposes by the sinusoidal signal of multiple waveform the sinusoidal signal formed.Particularly, the pumping signal be applied on electrode can be single sinusoidal signal, also can be that many sinusoidal signals encourage simultaneously, to realize the acquisition of the electrical impedance information at multi-frequency place.
According to the embodiment of another aspect of the present utility model, also proposed a kind of for consumer, comprising: the proving installation of the conductivity as described in above-mentioned any one technical scheme.Consumer can be water purifier etc.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the structural representation of the proving installation of the conductivity according to embodiment of the present utility model;
Fig. 2 shows the structural representation according to the first filtering circuit in the proving installation of the conductivity of embodiment of the present utility model;
Fig. 3 shows the structural representation according to the current sampling circuit in the proving installation of the conductivity of embodiment of the present utility model;
Fig. 4 shows the structural representation of the peak detection circuit of the proving installation of the conductivity according to embodiment of the present utility model.
Embodiment
In order to more clearly understand above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments, the utility model is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from other modes described here and implement, and therefore, protection domain of the present utility model is not by the restriction of following public specific embodiment.
Fig. 1 shows the structural representation of the proving installation of the conductivity according to embodiment of the present utility model.
As shown in Figure 1, according to the proving installation of the conductivity of embodiment of the present utility model, comprising: square wave occurring source 102, for generation of square-wave signal; First filtering circuit 104, is connected to described square wave occurring source 102, carries out filtering process, do not comprised the sinusoidal signal of flip-flop for the described square-wave signal produced described square wave occurring source 102, using by described sinusoidal signal as test voltage; Test electrode unit 106, comprise the two groups of test electrodes be connected in parallel, often group test electrode in described two groups of test electrodes is in parallel with a resistance 118, and described test electrode unit 106 is connected to described first filtering circuit 104, for described test voltage is applied to medium to be tested; Current detection circuit 108, for detecting the current signal flowing through described test electrode unit 106, and is converted into corresponding voltage signal by the current signal detected; On-off circuit 114, is connected between described test electrode unit 106 and described current detection circuit 108, for controlling the duty often organizing test electrode in described two groups of test electrodes; Signal processing circuit 112, is connected to described current detection circuit 108, and the voltage signal for exporting according to described current detection circuit 108 determines the conductivity of described medium to be tested 116.
By the first filtering circuit 104 is connected to square wave occurring source 102, to carry out filtering process to described square-wave signal, final acquisition is not containing the sinusoidal signal of flip-flop, can avoid adopting continuous-current excitation signal in correlation technique, or directly adopt and undressedly include the ac-excited signal of flip-flop and cause polarization of electrode effect; Meanwhile, owing to being the sinusoidal signal by obtaining after carrying out filtering process to square-wave signal, therefore can to ensure to be applied on electrode ac-excited has stable amplitude and frequency, and then can guarantee the accuracy of conductivity test result.
Meanwhile, by a resistance 118 in parallel with test electrode, the current signal strength that current detection circuit 108 detects can be improved, and then can realize measuring the medium of low conductivity.
In addition, by arranging on-off circuit 114 to control often to organize the duty of test electrode, enhance the test diversity of the proving installation of conductivity, namely can by the simple switching of on-off circuit 114, realize treating tested media by different test electrodes and testing, avoid employing one group of test electrode to different medium or test the conductivity before and after media processes and cause testing inconvenient, that user operation is loaded down with trivial details problem.Particularly, as measured the water quality before and after water purifier process by two groups of test electrodes.Preferably, in two groups of test electrodes, only can there is one group of test electrode work at synchronization, to avoid producing interference between the signal of two groups of test electrode tests.
In addition, the cost of the proving installation of the conductivity that the utility model proposes is lower, be convenient to batch production and the application of the proving installation realizing conductivity, as being applied in water quality (potable water etc.), heavy metal pollution, skin (human body skin moisture, fat, skin disease), electrolyte (acid or alkali), biological tissue's (disease, as breast cancer, prostate cancer etc.), meat products (beef, pork, donkey meat, dog meats, chicken, the meat products such as duck are rotten to be detected), grain (rice, the cereal such as wheat) moisture, soil moisture, liquid medium liquid level, temperature survey, alcoholic strength, Water-In-Oil, oil-in-water, in the measurement of the conductivity such as electromagnetic nondestructive.
In addition, according to the proving installation of the conductivity of above-described embodiment of the present utility model, following additional technical characteristic can also be had:
According to an embodiment of the present utility model, described signal processing circuit 112, comprising: peak detection circuit 1122, is connected to described current detection circuit 108, for detecting the peak value of the described voltage signal that described current detection circuit 108 exports; Analog to digital converter 1124, is connected to described peak detection circuit 1122, carries out analog-to-digital conversion process, to obtain digital signal for the peak value detected described peak detection circuit 1122; Microprocessor 1126, is connected to described analog to digital converter 1124, for determining the conductivity of described medium to be tested according to described digital signal.
By setting gradually peak detection circuit 1122, analog to digital converter 1124 and microprocessor 1126 in signal processing circuit 112, can make to test the conductivity value obtained and being compatible with digital circuit.Particularly, by simulating signal is quantified as digital signal, user can be made to check the conductivity of test more intuitively, improve Consumer's Experience.
Wherein, when determining the conductivity of medium 116 to be tested, the voltage peak that can detect according to peak detection circuit 1122 calculates the conductance sum of medium 116 to be tested and resistance 118, then the conductance of testing medium is obtained after deducting the conductance of resistance 118, and conductance and conductivity proportional, and then according to the parameter determination scale-up factor of test electrode, thus the conductivity of medium 116 to be tested can be obtained.
According to an embodiment of the present utility model, described signal processing circuit 112, also comprise: the second filtering circuit (not shown), described peak detection circuit 1122 is connected to described current detection circuit 108 by described second filtering circuit, and the described voltage signal that described second filtering circuit is used for described current detection circuit 108 exports carries out filtering and noise reduction process.
By arranging the second filtering circuit between current detection circuit 108 and peak detection circuit 1122, filtering process is carried out with the voltage signal exported current detection circuit 108, reduce noise and the fluctuation situation of test signal, and then the accuracy of test result can be ensured.
According to an embodiment of the present utility model, described signal processing circuit 112, also comprise: the 3rd filtering circuit (not shown), described analog to digital converter 1124 is connected to described peak detection circuit 1122 by described 3rd filtering circuit, and the voltage peak signal that described 3rd filtering circuit is used for described peak detection circuit 1122 exports carries out filtering and noise reduction process.
By arranging the 3rd filtering circuit between peak detection circuit 1122 and analog to digital converter 1124, filtering process is carried out with the voltage signal exported peak detection circuit 1122, create a further reduction noise and the fluctuation situation of test signal, and then also can ensure the accuracy of test result.
According to an embodiment of the present utility model, described microprocessor 1126 comprises described square wave occurring source 102.
By square wave occurring source 102 being arranged in described microprocessor 1126, setting parameter and amendment can being carried out by microprocessor 1126 pairs of square wave occurring source 102, if microprocessor 1126 is single-chip microcomputer, square-wave signal can be exported by single-chip microcomputer.In addition, adopt square wave occurring source 102 to reduce the holistic cost of the proving installation of conductivity, particularly, square-wave signal is one of signal obtaining sinusoidal signal the most easily, therefore, need not adopt high ground equipment to obtain the sine wave signal without flip-flop.
According to an embodiment of the present utility model, described microprocessor 1126 also for: the mode that described square wave occurring source 102 produces described square-wave signal is controlled.Wherein, microprocessor 1126 can control the lasting generation square-wave signal of square wave occurring source 102, to realize the continuance test treating tested media, as carried out continuance test to the conductivity in water purifier water route; Certainly, microprocessor 1126 also can control square wave occurring source 102 and at a time produce square-wave signal, to realize the interruption test treating tested media, namely just tests when needs are tested, as the test etc. to soil moisture, meat products.
According to an embodiment of the present utility model, described microprocessor 1126 comprises: decision circuitry (not shown), for judging whether the conductivity of the medium described to be tested determined is in default conductivity range; Cue circuit (not shown), is connected to described decision circuitry, for when described decision circuitry judges that the conductivity of described medium to be tested is not in described default conductivity range, sends cue.
By arranging decision circuitry and cue circuit in microprocessor 1126, can be implemented in after determining conductivity, according to the comparison of conductivity and default conductivity range, determine the state of matter corresponding to conductivity, and by result of determination is prompted to user, make user obtain state of matter more intuitively, improve Consumer's Experience.
According to an embodiment of the present utility model, described on-off circuit 114 comprises: two switches 118, and each described switch 118 is connected with test electrode described in a group, and each described switch 118 is for controlling the duty of test electrode described in a group.
Control the duty of one group of test electrode respectively by arranging two switches 118, can at one time in, select arbitrary group of test electrode to test, the convenient control realized two groups of test electrodes.
According to an embodiment of the present utility model, described microprocessor 1126 is also connected to described on-off circuit 114, closes for controlling each described switch 118 or disconnects, to control the described duty often organizing test electrode.
Controlled the closure state of each switch 118 by microprocessor 1126, achieve the convenient effect controlling the duty of test electrode.Wherein, on-off circuit 114 can be analog switching circuit.
According to an embodiment of the present utility model, described first filtering circuit 104 comprises: the filtering circuit combined by bandpass filter and pi type filter.
The filtering circuit combined by bandpass filter and pi type filter, as the first filtering circuit 104, is obtained effectively not containing the sinusoidal signal of flip-flop, and then avoids the electrode polarization effect that direct current signal causes; And can guarantee that obtaining sinusoidal signal has stable amplitude and frequency, and then the accuracy of conductivity test result can be guaranteed.
According to an embodiment of the present utility model, described sinusoidal signal is the sinusoidal signal with single waveform, or superposes by the sinusoidal signal of multiple waveform the sinusoidal signal formed.Particularly, the pumping signal be applied on test electrode can be single sinusoidal signal, also can be that many sinusoidal signals encourage simultaneously, to realize the acquisition of the electrical impedance information at multi-frequency place.
Wherein, the circuit structure of the first filtering circuit 104 can as shown in Figure 2, and the input end 1042 of the first filtering circuit 104 is connected to the output terminal of square wave occurring source 102, and the first filtering circuit output terminal 1044 is connected to test electrode unit 106.
The circuit structure of current detection circuit 108 can be as shown in Figure 3, the input end 1082 of current detection circuit 108 is sampled to the electric current flowing through test electrode unit 106, and the output terminal 1084 of current detection circuit 108 is connected to the input end of peak detection circuit 1122.
The circuit structure of peak detection circuit 1122 can be as shown in Figure 4, the input end 112A of peak detection circuit 1122 is connected to the output terminal 1084 of current detection circuit 108, and the output terminal 112B of peak detection circuit 1122 is connected to the input end of analog to digital converter 1124.
More than be described with reference to the accompanying drawings the technical solution of the utility model, the utility model proposes a kind of proving installation of new conductivity, can under the prerequisite avoiding test electrode polarized, exactly the medium of low conductivity is tested, and employing one group of test electrode can be avoided to cause, and test is inconvenient, the inaccurate problem of test result.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a proving installation for conductivity, is characterized in that, comprising:
Square wave occurring source, for generation of square-wave signal;
First filtering circuit, is connected to described square wave occurring source, carries out filtering process, do not comprised the sinusoidal signal of flip-flop for the described square-wave signal produced described square wave occurring source, using by described sinusoidal signal as test voltage;
Test electrode unit, comprise the two groups of test electrodes be connected in parallel, often group test electrode in described two groups of test electrodes and a resistor coupled in parallel, described test electrode unit is connected to described first filtering circuit, for described test voltage is applied to medium to be tested;
Current detection circuit, for detecting the current signal flowing through described test electrode unit, and is converted into corresponding voltage signal by the current signal detected;
On-off circuit, is connected between described test electrode unit and described current detection circuit, for controlling the duty often organizing test electrode in described two groups of test electrodes;
Signal processing circuit, is connected to described on-off circuit, and the voltage signal for exporting according to described current detection circuit determines the conductivity of described medium to be tested.
2. the proving installation of conductivity according to claim 1, is characterized in that, described signal processing circuit, comprising:
Peak detection circuit, is connected to described current detection circuit, for detecting the peak value of the described voltage signal that described current detection circuit exports;
Analog to digital converter, is connected to described peak detection circuit, carries out analog-to-digital conversion process, to obtain digital signal for the peak value detected described peak detection circuit;
Microprocessor, is connected to described analog to digital converter, for determining the conductivity of described medium to be tested according to described digital signal.
3. the proving installation of conductivity according to claim 2, is characterized in that, described signal processing circuit, also comprises:
Second filtering circuit, described peak detection circuit is connected to described current detection circuit by described second filtering circuit, and described second filtering circuit is used for carrying out filtering and noise reduction process to the described voltage signal that described current detection circuit exports.
4. the proving installation of conductivity according to claim 2, is characterized in that, described signal processing circuit, also comprises:
3rd filtering circuit, described analog to digital converter is connected to described peak detection circuit by described 3rd filtering circuit, and described 3rd filtering circuit is used for carrying out filtering and noise reduction process to the voltage peak signal that described peak detection circuit exports.
5. the proving installation of conductivity according to claim 2, is characterized in that, described microprocessor comprises described square wave occurring source, described microprocessor also for: the mode that described square wave occurring source produces described square-wave signal is controlled.
6. the proving installation of conductivity according to claim 2, is characterized in that, described on-off circuit comprises:
Two switches, each described switch is connected with test electrode described in a group, and each described switch is for controlling the duty of test electrode described in a group.
7. the proving installation of conductivity according to claim 6, is characterized in that, described microprocessor is also connected to described on-off circuit, closes for controlling each described switch or disconnects, to control the described duty often organizing test electrode.
8. the proving installation of conductivity according to claim 1, is characterized in that, described first filtering circuit comprises: the filtering circuit combined by bandpass filter and pi type filter.
9. the proving installation of conductivity according to any one of claim 1 to 8, is characterized in that, described sinusoidal signal is the sinusoidal signal with single waveform, or superposes by the sinusoidal signal of multiple waveform the sinusoidal signal formed.
10. a consumer, is characterized in that, comprising: the proving installation of conductivity as claimed in any one of claims 1-9 wherein.
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| CN201420688532.4U CN204241570U (en) | 2014-11-14 | 2014-11-14 | The proving installation of conductivity and consumer |
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| CN201420688532.4U CN204241570U (en) | 2014-11-14 | 2014-11-14 | The proving installation of conductivity and consumer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066424A (en) * | 2016-06-08 | 2016-11-02 | 重庆金山科技（集团）有限公司 | Esophagus impedance detection circuit |
| CN113155008A (en) * | 2021-03-10 | 2021-07-23 | 广东化一环境科技有限公司 | Thickness detection equipment and detection method for layered medium |
-
2014
- 2014-11-14 CN CN201420688532.4U patent/CN204241570U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066424A (en) * | 2016-06-08 | 2016-11-02 | 重庆金山科技（集团）有限公司 | Esophagus impedance detection circuit |
| CN106066424B (en) * | 2016-06-08 | 2018-10-19 | 重庆金山科技（集团）有限公司 | Esophagus impedance detection circuit |
| CN113155008A (en) * | 2021-03-10 | 2021-07-23 | 广东化一环境科技有限公司 | Thickness detection equipment and detection method for layered medium |
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