CN201681118U - Output current detection device of high voltage electric field and electric potential therapeutic apparatus - Google Patents
Output current detection device of high voltage electric field and electric potential therapeutic apparatus Download PDFInfo
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- CN201681118U CN201681118U CN2010202055928U CN201020205592U CN201681118U CN 201681118 U CN201681118 U CN 201681118U CN 2010202055928 U CN2010202055928 U CN 2010202055928U CN 201020205592 U CN201020205592 U CN 201020205592U CN 201681118 U CN201681118 U CN 201681118U
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Abstract
The utility model relates to an output current detection device of a high voltage electric field and electric potential therapeutic apparatus and provides a detection device which is suitable for high-voltage tiny current detection and carries out overcurrent protection of equipment; a high-tension transformer is serially connected with a sample resistance, and then is connected with one end of the power supply, a current-limiting resistance is serially connected with the input end of a photoelectric coupler, and then is connected to two ends of the sample resistance in parallel, one end of a pull-up resistor is connected with the collector of an output NPN audion of the photoelectric coupler, the other end of the pull-up resistor is connected with the plus 5V power supply in the controller, and the emitting electrode of the output NPN audion of the photoelectric coupler is connected with a power ground of the controller; the detection device can detect and control the output current of the therapeutic apparatus and protect the therapeutic apparatus and patients actively, the current-limiting resistance in the high-voltage circuit is reduced or canceled, the output intensity of the high voltage electric field is enhanced, the heating of the therapeutic apparatus is reduced and the structure is simple.
Description
Technical field:
The utility model relates to a kind of detection that is applicable to the high pressure Weak current, and then the pick-up unit that carries out the overcurrent protection of equipment, is specifically related to a kind of high-voltage electric field, electric potential therapy instrument detecting device for output current.
Background technology:
The thousands of volts of output are to the 50Hz ac high-voltage that is tens thousand of volts usually for therapeutic equipment, and wherein on a termination the earth or the power lead, another termination is sat (crouching) formula effector (being used to produce the insulating electrode of electric field), utilizes the high-voltage electric field that produces that the patient is treated.For the life security that ensures the patient and the safety of therapeutic equipment, at present, all adopt the resistance that in output loop, seals in a few megaohm to tens megaohms to carry out current limliting, this method can be brought the problem of three aspects:
At first, can produce bigger voltage drop on the current-limiting resistance, reach the 1-3 kilovolt sometimes, output voltage is reduced, influence result of treatment;
Secondly, when load is heavier, use simultaneously etc. as humid environment, patient and ground bad, the many people of insulation, the output current of therapeutic equipment is bigger, and the current-limiting resistance heating is serious, may cause the damage or the life-span reduction of therapeutic equipment;
At last, also be maximum defective, if seat (crouching) formula effector breakage or patient touch high-voltage output end, the patient gets an electric shock probably, therapeutic equipment can cutoff high not exported, and only depends on electric current-limiting resistance can not play enough protective effects.
The utility model content:
The purpose of this utility model provides a kind of high-voltage electric field, electric potential therapy instrument detecting device for output current; it can seal in the high pressure output loop; detect Weak current (0.2mA-2mA); by photoelectrical coupler to the controller output current wave; and the electrical isolation between realization high tension loop and the controller; overcome existing electric field, the electric potential therapy instrument only adopts current-limiting resistance, easily heating damage and overcurrent after the defective that can not initiatively protect.
In order to solve the existing problem of background technology, the utility model is by the following technical solutions: an end of ground connection or power supply direct (perhaps through a rectifier bridge) seals in a sample resistance in the therapeutic equipment high tension loop, the high tension loop electric current can produce voltage drop on this sample resistance, this voltage drop is applied to the input end of photoelectrical coupler again through a current-limiting resistance, cause light signal and the electric current in the high tension loop in the photoelectrical coupler linear.The emitter of NPN triode connects the ground of controller power source in the photoelectrical coupler, and collector by pull-up resistor connect controller power source (be generally+5V), thereby, the voltage waveform of photoelectrical coupler output has reflected the current waveform of high tension loop, and reaches the purpose with the electrical isolation of high tension loop.
Photoelectrical coupler output is connected with Chip Microcomputer A/D converter pin in the controller, this signal of single-chip microcomputer timing acquiring, and the integrated value of interior (20ms) signal of calculating one-period, the current value in this integrated value and the high tension loop is proportional.When the high tension loop electric current reached the lowest high-current value that therapeutic equipment allows, controller cutoff high output at once reached the purpose of overcurrent protection.
The beneficial effects of the utility model are: can detect and control the output current of therapeutic equipment, protect therapeutic equipment and patient on one's own initiative; Reduce or cancel current-limiting resistance in the high tension loop, strengthen the output intensity of high-voltage electric field, reduce the therapeutic equipment heating; Simple in structure.
Description of drawings:
Fig. 1 is a structural representation of the present utility model,
Fig. 2 is the structural representation of embodiment two,
Fig. 3 is the structural representation of embodiment three,
Fig. 4 is the structural representation of embodiment four.
Embodiment:
Embodiment one: with reference to Fig. 1, this embodiment is by the following technical solutions: it comprises high-tension transformer 1, sample resistance 2, current-limiting resistance 3, unidirectional photoelectrical coupler 4, pull-up resistor 5 and single-chip microcomputer 6, high-tension transformer 1 is connected with sample resistance 2, receive an end of ground or power supply again, current-limiting resistance 3 is connected with the input end of photoelectrical coupler 4, be parallel to the two ends of sample resistance 2 again, pull-up resistor 5 one ends are connected with the collector of photoelectrical coupler 4 output NPN triodes, in pull-up resistor 5 another termination controllers+the 5V power supply, the emitter of photoelectrical coupler 4 output NPN triodes connects controller power source ground.
The collector of photoelectrical coupler 4 output NPN triodes is exported as detection signal, can detect the half-wave alternating current in the high tension loop.
Sample resistance 2 and current-limiting resistance 3 are generally several kilo-ohms, sample resistance 2 resistances are chosen and should be guaranteed that voltage drop value that loop current produces is greater than the required minimum threshold voltage of photoelectrical coupler 4 inputs thereon, the resistance little minimizing power consumption of trying one's best again, current-limiting resistance 3 resistances will guarantee saturated phenomenon not occur at photoelectrical coupler 4.
An end of ground connection or power supply direct (perhaps through a rectifier bridge) seals in sample resistance 2 in the therapeutic equipment high tension loop, the high tension loop electric current can produce voltage drop on this sample resistance 2, this voltage drop is applied to the input end of photoelectrical coupler 4 again through a current-limiting resistance 3, cause light signal and the electric current in the high tension loop in the photoelectrical coupler 4 linear.The emitter of NPN triode connects the ground of controller power source in the photoelectrical coupler 4, and collector by pull-up resistor connect controller power source (be generally+5V), thereby, the voltage waveform of photoelectrical coupler 4 output has reflected the current waveform of high tension loop, and reaches the purpose with the electrical isolation of high tension loop.
Photoelectrical coupler 4 output is connected with Chip Microcomputer A/D converter pin in the controller, this signal of single-chip microcomputer 6 timing acquiring, and the integrated value of interior (20ms) signal of calculating one-period, the current value in this integrated value and the high tension loop is proportional.When the high tension loop electric current reached the lowest high-current value that therapeutic equipment allows, controller cutoff high output at once reached the purpose of overcurrent protection.
This embodiment can seal in the high pressure output loop, detect Weak current (0.2mA-2mA), by photoelectrical coupler to the controller output current wave, and the electrical isolation between realization high tension loop and the controller, overcome existing electric field, the electric potential therapy instrument only adopts current-limiting resistance, easily heating damage and overcurrent after the defective that can not initiatively protect, can detect and control the output current of therapeutic equipment, protect therapeutic equipment and patient on one's own initiative; Reduce or cancel current-limiting resistance in the high tension loop, strengthen the output intensity of high-voltage electric field, reduce the therapeutic equipment heating; Simple in structure.
Embodiment two: with reference to Fig. 2, this embodiment is with the difference of embodiment one: it also comprises bi-directional light electric coupler 41, bi-directional light electric coupler 41 replaces individual event photoelectrical coupler 4, and other composition is identical with embodiment one with annexation.
Embodiment three: with reference to Fig. 3, this embodiment is with the difference of embodiment two: it also comprises rectifier bridge 7, high-tension transformer 1 is connected with the end that exchanges of rectifier bridge 7, the DC terminal of rectifier bridge 7 is in parallel with sample resistance 2, and other composition is identical with embodiment two with annexation.
Embodiment four: with reference to Fig. 3, this embodiment is with the difference of embodiment one: it also comprises rectifier bridge 7, high-tension transformer 1 is connected with sample resistance 2, the interchange end of rectifier bridge 7 is in parallel with sample resistance 2, current-limiting resistance 3 is connected with the input end of bi-directional light electric coupler 41, be parallel to the direct current two ends of rectifier bridge 7 again, other compositions are identical with embodiment one with annexation.
Claims (5)
1. high-voltage electric field, electric potential therapy instrument detecting device for output current, it is characterized in that it comprises high-tension transformer (1), sample resistance (2), current-limiting resistance (3), unidirectional photoelectrical coupler (4), pull-up resistor (5) and single-chip microcomputer (6), high-tension transformer (1) is connected with sample resistance (2), connect an end of power supply again, current-limiting resistance (3) is connected with the input end of photoelectrical coupler (4), be parallel to the two ends of sample resistance (2) again, pull-up resistor (5) one ends are connected with the collector of photoelectrical coupler (4) output NPN triode, in another termination controller of pull-up resistor (5)+the 5V power supply, the emitter of photoelectrical coupler (4) output NPN triode connects controller power source ground.
2. high-voltage electric field according to claim 1, electric potential therapy instrument detecting device for output current is characterized in that the collector of photoelectrical coupler (4) output NPN triode is exported as detection signal.
3. high-voltage electric field according to claim 1, electric potential therapy instrument detecting device for output current is characterized in that it also comprises bi-directional light electric coupler (41).
4. high-voltage electric field according to claim 1, electric potential therapy instrument detecting device for output current, it is characterized in that it also comprises rectifier bridge (7), high-tension transformer (1) is connected with the end that exchanges of rectifier bridge (7), and the DC terminal of rectifier bridge (7) is in parallel with sample resistance (2).
5. high-voltage electric field according to claim 1, electric potential therapy instrument detecting device for output current, it is characterized in that it also comprises rectifier bridge (7), high-tension transformer (1) is connected with sample resistance (2), the interchange end of rectifier bridge (7) is in parallel with sample resistance (2), current-limiting resistance (3) is connected with the input end of bi-directional light electric coupler (41), is parallel to the direct current two ends of rectifier bridge (7) again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202055928U CN201681118U (en) | 2010-05-27 | 2010-05-27 | Output current detection device of high voltage electric field and electric potential therapeutic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202055928U CN201681118U (en) | 2010-05-27 | 2010-05-27 | Output current detection device of high voltage electric field and electric potential therapeutic apparatus |
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| Publication Number | Publication Date |
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| CN201681118U true CN201681118U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202055928U Expired - Fee Related CN201681118U (en) | 2010-05-27 | 2010-05-27 | Output current detection device of high voltage electric field and electric potential therapeutic apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336165A (en) * | 2013-06-25 | 2013-10-02 | 西安电子科技大学 | Detection circuit for overcurrent of alternating current and direct current |
| CN103837732A (en) * | 2014-03-21 | 2014-06-04 | 上海富欣智能交通控制有限公司 | Passive current detecting circuit |
| CN107390117A (en) * | 2016-05-17 | 2017-11-24 | 福特全球技术公司 | A kind of switch high voltage sample circuit for electric vehicle |
| CN112003479A (en) * | 2020-09-01 | 2020-11-27 | 中车青岛四方车辆研究所有限公司 | Digital quantity acquisition circuit and acquisition method |
-
2010
- 2010-05-27 CN CN2010202055928U patent/CN201681118U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336165A (en) * | 2013-06-25 | 2013-10-02 | 西安电子科技大学 | Detection circuit for overcurrent of alternating current and direct current |
| CN103837732A (en) * | 2014-03-21 | 2014-06-04 | 上海富欣智能交通控制有限公司 | Passive current detecting circuit |
| CN103837732B (en) * | 2014-03-21 | 2017-07-18 | 上海富欣智能交通控制有限公司 | Passive current detection circuit |
| CN107390117A (en) * | 2016-05-17 | 2017-11-24 | 福特全球技术公司 | A kind of switch high voltage sample circuit for electric vehicle |
| CN112003479A (en) * | 2020-09-01 | 2020-11-27 | 中车青岛四方车辆研究所有限公司 | Digital quantity acquisition circuit and acquisition 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20160527 |