CN205333721U - Adopt optical coupling isolation's well low frequency treatment device's voltage signal sampling circuit - Google Patents
Adopt optical coupling isolation's well low frequency treatment device's voltage signal sampling circuit Download PDFInfo
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- CN205333721U CN205333721U CN201620030360.0U CN201620030360U CN205333721U CN 205333721 U CN205333721 U CN 205333721U CN 201620030360 U CN201620030360 U CN 201620030360U CN 205333721 U CN205333721 U CN 205333721U
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Abstract
The utility model discloses an adopt optical coupling isolation's well low frequency treatment device's voltage signal sampling circuit, a serial communication port, including sampling circuit, linear opto -coupler voltage transmission circuit, rectifier circuit, smoothed filter circuit, low pass filter circuit, sampling circuit for gather outside therapeutic instrument plate electrode output circuit voltage, export outside singlechip controller to behind the voltage warp nature opto -coupler voltage transmission circuit after the sampling circuit sampling, rectifier circuit, smoothed filter circuit, low pass filter circuit, rectifier circuit is used for the AC current waveform rectified output to the output of warp nature opto -coupler voltage transmission circuit, smoothed filter circuit is used for carrying out smoothness, filtering to the pulsating voltage of rectifier circuit output, the low pass filter circuit for highs among the filtering sample voltage disturbs.
Description
Technical field
This utility model relates to therapeutic instrument field, particularly relates to the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation。
Background technology
Medium-low frequency therapeutical instrument (abbreviation therapeutic instrument) is owing to passing through operation simulation Chinese medicine acupuncture and the massage of electronic circuit, massaging, the various motion such as beat, thus reaching relaxing muscles and tendons to promote blood circulation, rapid fatigue alleviating, recovering the functions such as human body, future will be widely used in domestic medicine。Owing to therapeutic instrument relies on two electrode plate output positive negative pulse stuffings, two electrode plate need to be close to human body skin, but for various reasons, battery lead plate easily loosens, easily cause and loop between two electrode plate, can not be effectively formed, and when battery lead plate and human contact's area deficiency, the intensity output that therapeutic instrument is identical can make the impression of the personnel that are treated there is bigger difference。
Utility model content
For solving above technical problem, the utility model proposes the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation, for monitoring the connection of therapeutic apparatus electrode plate in real time。
The technical solution of the utility model is:
The voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation, it is characterised in that include sample circuit, linear optical coupling voltage transfer circuit, rectification circuit, smoothed filter circuit, low-pass filter circuit；Sample circuit, is used for gathering external treatment instrument battery lead plate output loop voltage, and after the linear optocoupler voltage transfer circuit of voltage after sampled circuit sampling, rectification circuit, smoothed filter circuit, low-pass filter circuit, output is to outside singlechip controller；Rectification circuit is for the AC wave shape rectification output to the output of linear optocoupler voltage transfer circuit；Smoothed filter circuit is for smoothing the pulsating volage of rectification circuit output, filter；Low-pass filter circuit, for filtering the high fdrequency component interference in sampled voltage。
Preferably, sample circuit is sampling resistor RIN。
Preferably, linear optical coupling voltage transfer circuit, including operational amplifier U2, feedback resistance R1 and R2, linear optical coupling U1；Operational amplifier U2 has two amplifier U2A and U2B inside it, and wherein the in-phase end of feedback resistance R1 and amplifier U2A is connected；The outfan of amplifier U2A is connected with the 2nd pin of linear optical coupling U1, and the 3rd pin of linear optical coupling U1 is connected with the in-phase end of amplifier U2A；6th output pin of linear optical coupling U1 is connected with the end of oppisite phase of amplifier U2B, and amplifier U2B is provided with negative feedback resistor R2。
Preferably, the resistance of the feedback resistance R1 resistance equal to feedback resistance R2。
Preferably, rectification circuit is made up of rectifier bridge stack D1。
Preferably, smoothed filter circuit is made up of electric capacity C1。
Preferably, between smoothed filter circuit and low-pass filter circuit, it is additionally provided with a current-limiting circuit, for the electric current of limiting circuit output。
Preferably, described current-limiting circuit is made up of current-limiting resistance R3。
By adopting above technical scheme, circuit stability is reliable。By linear optical coupling voltage transfer circuit, effectively output loop and sampling circuit can be carried out light-coupled isolation；Signal after light-coupled isolation successively carries out rectification, smooth, current limliting, low-pass filtering and protection circuit, while making input to the voltage of singlechip controller AD pin keep, effectively reduces electric current, it is prevented that have bigger filling electric current to occur for single-chip microcomputer。
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model；
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with diagram and specific embodiment, this utility model is expanded on further。
As it is shown in figure 1, adopt the voltage signal sampling circuit of the medium-low frequency therapeutical instrument of light-coupled isolation, including sample circuit 1, linear optical coupling voltage transfer circuit 2, rectification circuit 3, smoothed filter circuit 4, current-limiting circuit 5, low-pass filter circuit 6, protection circuit 7；Sample circuit 1 is used for gathering external treatment instrument battery lead plate output loop voltage, and the linear optocoupler voltage transfer circuit 2 of voltage after the sampling of sampled circuit 1, rectification circuit 3 carry out rectification and form pulsating dc voltage。Smoothed filter circuit 4 is for smoothing the pulsating volage of rectification circuit output, filter；Low-pass filter circuit 6, for filtering the high fdrequency component interference in sampled voltage；External treatment instrument battery lead plate output loop signal successively linear optocoupler voltage transfer circuit inputs to external microcontroller controller after carrying out smooth, current-limiting circuit current limliting, the low-pass filter circuit filtering of Phototube Coupling, rectifier circuit rectifies, smoothed filter circuit。
Sample circuit includes sampling resistor RIN, sampling resistor RIN and connects in therapeutic apparatus electrode plate output loop, and its both end voltage is for being used as the input voltage of sample circuit。
Linear optical coupling voltage transfer circuit, including operational amplifier U2, feedback resistance R1 and R2, linear optical coupling U1；Wherein operational amplifier U2 adopts the LM358 that single supply is powered, and with the in-phase end of amplifier U2A is connected after having two amplifier U2A and U2B, sampling resistor RIN and feedback resistance R1 series connection inside it；The outfan of amplifier U2A is connected with the 2nd pin of linear optical coupling U1, and the 3rd pin of linear optical coupling U1 is connected with the in-phase end of amplifier U2A；6th output pin of linear optical coupling U1 is connected with the end of oppisite phase of amplifier U2B, and amplifier U2B is provided with negative feedback resistor R2。
Linear optical coupling U1 adopts high-accuracy linear optical coupling HCNR201, and it constitutes voltage transfer circuit with operational amplifier U2, R1 and R2, and due to R1=R2, then U2B end output voltage is consistent with U2A end input voltage。
Rectification circuit is made up of rectifier bridge stack D1；Rectifier bridge stack D1 adopts the 2A bridge heap 2W10 of SEP encapsulation, exports for AC wave shape rectification。Smoothed filter circuit is made up of smothing filtering electric capacity C1；Smoothed filter circuit C1 is for smoothing the pulsating volage of rectification output, filter。Current-limiting circuit is made up of current-limiting resistance R3；Current-limiting resistance R3 is for the electric current to the output of limited samples circuit。Low-pass filter circuit is made up of resistance R4 and electric capacity C2, for filtering the high fdrequency component interference in sampled voltage。Protection circuit is made up of diode D2 and the D3 of two reversal connections, for the AD pin of singlechip controller carries out the generating positive and negative voltage protection of input voltage。
The RIN series connection of this circuit accesses in the output loop of therapeutic apparatus electrode plate, once therapeutic instrument normal operation, then has intermediate frequency Modulation waveform between peak-to-peak value 150-220V in output loop, and R1 two ends then form the pressure drop of certain voltage。It is the linear optical coupling transmission circuit that core is constituted that this voltage first passes around by HCNR201, piles D1 via bridge afterwards and carries out rectification formation pulsating dc voltage。This voltage first carries out smothing filtering via C1, then through R1 current limliting, afterwards after R4 and the C2 filter circuit constituted filtering, after the protection with right and opposite directions of D2 and D3, exports the PF4 pin to singlechip controller。
When battery lead plate loop is constituted, singlechip controller will collect the DC voltage lower than 5V from PF4 pin；When no-voltage in battery lead plate loop, singlechip controller by the voltage that gathers from PF4 pin close to 0V。According to this situation, it is possible to effectively judge whether battery lead plate loop effectively forms。
Of the present utility model ultimate principle, principal character and of the present utility model advantage have more than been shown and described。Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope, this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model。
Claims (8)
1. the voltage signal sampling circuit of the medium-low frequency therapeutical instrument adopting light-coupled isolation, it is characterised in that include sample circuit, linear optical coupling voltage transfer circuit, rectification circuit, smoothed filter circuit, low-pass filter circuit；
Sample circuit, is used for gathering external treatment instrument battery lead plate output loop voltage, and after the linear optocoupler voltage transfer circuit of voltage after sampled circuit sampling, rectification circuit, smoothed filter circuit, low-pass filter circuit, output is to outside singlechip controller；
Rectification circuit is for the AC wave shape rectification output to the output of linear optocoupler voltage transfer circuit；
Smoothed filter circuit is for smoothing the pulsating volage of rectification circuit output, filter；
Low-pass filter circuit, for filtering the high fdrequency component interference in sampled voltage。
2. the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation according to claim 1, it is characterised in that sample circuit is sampling resistor RIN。
3. the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation according to claim 1, it is characterised in that linear optical coupling voltage transfer circuit, including operational amplifier U2, feedback resistance R1 and R2, linear optical coupling U1；Operational amplifier U2 has two amplifier U2A and U2B inside it, and wherein the in-phase end of feedback resistance R1 and amplifier U2A is connected；The outfan of amplifier U2A is connected with the 2nd pin of linear optical coupling U1, and the 3rd pin of linear optical coupling U1 is connected with the in-phase end of amplifier U2A；6th output pin of linear optical coupling U1 is connected with the end of oppisite phase of amplifier U2B, and amplifier U2B is provided with negative feedback resistor R2。
4. the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation according to claim 3, it is characterised in that the resistance of the feedback resistance R1 resistance equal to feedback resistance R2。
5. the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation according to claim 1, it is characterised in that rectification circuit is made up of rectifier bridge stack D1。
6. the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation according to claim 1, it is characterised in that smoothed filter circuit is made up of electric capacity C1。
7. the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation according to claim 1, it is characterised in that be additionally provided with a current-limiting circuit between smoothed filter circuit and low-pass filter circuit, for the electric current of limiting circuit output。
8. the voltage signal sampling circuit of a kind of medium-low frequency therapeutical instrument adopting light-coupled isolation according to claim 7, it is characterised in that described current-limiting circuit is made up of current-limiting resistance R3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620030360.0U CN205333721U (en) | 2016-01-13 | 2016-01-13 | Adopt optical coupling isolation's well low frequency treatment device's voltage signal sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620030360.0U CN205333721U (en) | 2016-01-13 | 2016-01-13 | Adopt optical coupling isolation's well low frequency treatment device's voltage signal sampling circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205333721U true CN205333721U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620030360.0U Expired - Fee Related CN205333721U (en) | 2016-01-13 | 2016-01-13 | Adopt optical coupling isolation's well low frequency treatment device's voltage signal sampling circuit |
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| CN (1) | CN205333721U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645905A (en) * | 2016-11-11 | 2017-05-10 | 大禹电气科技股份有限公司 | Output voltage isolation sampling circuit of high-voltage inverter |
| CN108152557A (en) * | 2017-12-26 | 2018-06-12 | 常州三立精图光电有限公司 | Sample circuit is isolated in a kind of feedback current |
-
2016
- 2016-01-13 CN CN201620030360.0U patent/CN205333721U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645905A (en) * | 2016-11-11 | 2017-05-10 | 大禹电气科技股份有限公司 | Output voltage isolation sampling circuit of high-voltage inverter |
| CN106645905B (en) * | 2016-11-11 | 2023-06-30 | 大禹电气科技股份有限公司 | Output voltage isolation sampling circuit of high-voltage frequency converter |
| CN108152557A (en) * | 2017-12-26 | 2018-06-12 | 常州三立精图光电有限公司 | Sample circuit is isolated in a kind of feedback current |
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| 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: 20160622 Termination date: 20210113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |