CN104548354A - Defibrillation charging overcurrent protection device of defibrillator monitor and defibrillator monitor - Google Patents
Defibrillation charging overcurrent protection device of defibrillator monitor and defibrillator monitor Download PDFInfo
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Abstract
The invention discloses a defibrillation charging overcurrent protection device of a defibrillator monitor and the defibrillator monitor. The defibrillation charging overcurrent protection device of the defibrillator monitor comprises a first protective module, a second protective module and a processing module, wherein the first protective module and the second protective module are in series connection to a charging circuit of the defibrillator monitor and are connected with the processing module, the first protective module is used for sending voltage data or current data to the processing module, the processing module is provided with a first reference value, when the voltage data or the current data are larger than the first reference value, a power supply switching-off signal is given, the second protective module is provided with a second reference value, and when the current in the charging circuit is larger than a current value corresponding to the second reference value, the second protective module switches off the charging circuit. Through two levels of overcurrent protection, the safety and stability of the charging circuit are higher, and safety and reliability of equipment are greatly improved.
Description
Technical field
The present invention relates to current protection technology field, particularly relate to a kind of defibrillation charging overcurrent protective device and defibrillation monitor of defibrillation monitor.
Background technology
Defibrillation monitor is a kind of medicine equipment for carrying out vital signs, external defibrillation, internal defibrillation and pace-making to patient, and its safe class is greater than general patient monitor.When charging to defibrillation monitor, require that the time of charging is more short better, thus can shorten the rescue time of patient, therefore the charging current of defibrillation monitor is maximum reaches more than 10A.If but break down in charging process, when causing charging current too large, will charging circuit be damaged, time serious, will the danger of circuit burnout be caused, and therefore need to need to be limited the charging current of circuit and control in charge circuit.
At present; common overcurrent protection adopts the single charge circuit of mode to defibrillation to protect, and such as installation insurance silk, when when there is overcurrent, action of fuse lost efficacy; the charging current of defibrillation device is too large, very likely causes the large area that plate carries device burn and cause the risk of fire.Therefore, the safety and stability of existing defibrillation charging overcurrent protective device is not high.
Summary of the invention
Based on this, be necessary for the problems referred to above, defibrillation charging overcurrent protective device and the defibrillation monitor of the defibrillation monitor that a kind of safety and stability is higher are provided.
A kind of defibrillation charging overcurrent protective device of defibrillation monitor, comprise the first protection module, the second protection module and processing module, described first protection module and described second protection module are series in the charge circuit of defibrillation monitor, and described first protection module also connects described processing module;
Described first protection module is used for sending voltage data or current data to described processing module, and described processing module is provided with first reference value, and sends power cutoff signal when described voltage data or current data are greater than described first reference value;
Described second protection module is provided with the second fiducial value, and when the electric current in described charge circuit is greater than current value corresponding to described second fiducial value, described second protection module disconnects described charge circuit.
Wherein in an embodiment, described second fiducial value is greater than described first reference value.
Wherein in an embodiment; described second protection module also connects described processing module; when described second protection module disconnects described charge circuit, described second protection module sends over-current signal to described processing module, and described processing module sends alarm signal according to described over-current signal.
Wherein in an embodiment, also comprise the control terminal connecting described processing module, for receiving described power cutoff signal and alarm signal, and according to described power cutoff signal open circuit, send warning message according to described alarm signal.
Wherein in an embodiment; the defibrillation charging overcurrent protective device of described defibrillation monitor comprises sampling resistor; described sampling resistor is series in described charge circuit; described first protection module comprises the current detector of the sample voltage value for detecting described sampling resistor two ends; described current detector is in parallel with described sampling resistor; and described current detector connects described processing module, and send described sample voltage value to described processing module.
Wherein in an embodiment, described first protection module also comprises timing unit and counting unit, and described timing unit is used for arranging and sends described sample voltage value to make the timing of described current detector to described processing module interval time; The number of times that described counting unit is used for being greater than the described sample voltage value that described current detector collects described first reference value counts to get overcurrent read-around ratio, and described overcurrent read-around ratio is sent to described processing module, what described processing module was corresponding is provided with pre-determined number, sends described power cutoff signal when described overcurrent read-around ratio is greater than described pre-determined number.
Wherein in an embodiment, described second protection module comprises prosecution unit, and described prosecution unit is parallel to described sampling resistor two ends, for detecting the sample voltage value at described sampling resistor two ends; Described prosecution unit is provided with described second fiducial value, and when described sample voltage value is greater than described second fiducial value, described prosecution unit controls disconnects described charge circuit.
Wherein in an embodiment, described prosecution unit comprised stream controller and switching tube, and the input of described switching tube connects described sampling resistor, and output connects described charge circuit, control end connects described stream controller excessively, and described stream controller is in parallel with described sampling resistor excessively; Described stream controller of crossing is provided with the second fiducial value, and disconnects described switching tube when described sample voltage value is greater than described second fiducial value.
Wherein in an embodiment, described prosecution unit also comprises timer capacitor, and the connection of described timer capacitor one end is described crosses stream controller, other end ground connection; When described sample voltage value is greater than described second fiducial value, described stream controller of crossing controls the charging of described timer capacitor, and when described timer capacitor is full of electricity, described stream controller of crossing controls the disconnection of described switching tube.
A kind of defibrillation monitor, comprises defibrillation charging overcurrent protective device and the charge circuit of above-mentioned defibrillation monitor, and described defibrillation charging overcurrent protective device is connected with described charge circuit.
The defibrillation charging overcurrent protective device of above-mentioned a kind of defibrillation monitor, on the one hand, the first protection module and the overcurrent protection of processing module composition one-level, when circuit generation overcurrent, processing module sends power cutoff signal so that timely power cutoff; On the other hand, the second protection module forms the overcurrent protection of another grade, and the timely open circuit when circuit generation overcurrent, makes electric current too much can not cause damage to equipment.By two-stage overcurrent protection, the safety and stability of charge circuit is higher, improves the safety and reliability of equipment greatly.
Above-mentioned a kind of defibrillation monitor, owing to comprising the defibrillation charging overcurrent protective device of above-mentioned defibrillation monitor, makes the safety and stability of charge circuit higher, improves the safety and reliability of equipment greatly.
Accompanying drawing explanation
Fig. 1 is the module map of the defibrillation charging overcurrent protective device preferred embodiment of defibrillation monitor of the present invention;
Fig. 2 is the module map of another embodiment of the defibrillation charging overcurrent protective device of defibrillation monitor of the present invention;
Fig. 3 is the concrete structure figure of a module shown in Fig. 2;
Fig. 4 is the concrete structure figure of another module shown in Fig. 2.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
With reference to figure 1; a kind of defibrillation charging overcurrent protective device of defibrillation monitor; comprise the first protection module 110, second protection module 120 and processing module 130; first protection module 110 and the second protection module 120 are series in the charge circuit of defibrillation monitor, and the first protection module 110 also connection handling module 130.First protection module 110 is for sending voltage data or current data to processing module 130, and processing module 130 is provided with first reference value, and sends power cutoff signal when voltage data or current data are greater than first reference value.Second protection module 120 is provided with the second fiducial value, and when the electric current in charge circuit is greater than current value corresponding to the second fiducial value, the second protection module 120 disconnects charge circuit.
Preferably, the second fiducial value is greater than first reference value.Namely the first protection module 110 and processing module 130 form first order software protection, and the second protection module 120 is second level hardware protection.When circuit generation over-current phenomenon avoidance, first trigger first order software protection, when first order software protection was lost efficacy, trigger second level hardware protection.Be appreciated that in other embodiments, also can be greater than the second fiducial value for first reference value, namely when circuit generation over-current phenomenon avoidance, first trigger second level hardware protection, when second level hardware protection lost efficacy, then trigger first order software protection.By the overcurrent protection of two-stage, improve the safety and reliability of equipment greatly.
With reference to figure 2, preferably, the second protection module 120 is connection handling module 130 also, and when the second protection module 120 disconnects charge circuit, the second protection module 120 sends over-current signal to processing module 130, and processing module 130 sends alarm signal according to over-current signal.Staff can learn the situation of charge circuit generation overcurrent by alarm signal.
Preferably; the defibrillation charging overcurrent protective device of above-mentioned defibrillation monitor also comprises the control terminal (not shown) of connection handling module 130; for receiving power cutoff signal and alarm signal; and according to power cutoff signal open circuit, send warning message according to alarm signal; thus staff can obtain the situation of the charge circuit overcurrent of defibrillation monitor in time, to take corresponding measure in time.In the present embodiment, control terminal is the host computer of connection handling module 130.
With reference to figure 3, the defibrillation charging overcurrent protective device of defibrillation monitor comprises sampling resistor 100, and sampling resistor 100 is series in charge circuit.First protection module 110 comprises the current detector 113 of the sample voltage value for detecting the first sampling resistor 100 two ends; sampling resistor 100 is in parallel with current detector 113; and current detector 113 connection handling module 130, and send sample voltage value to processing module 130.In the present embodiment, the first protection module 110 obtains voltage data and sends to processing module 130, and the first reference value of processing module 130 is magnitude of voltage.Wherein, voltage data is the sample voltage value of sampling resistor 100; be the actual voltage value at sampling resistor 100 two ends; first reference value is the maximum voltage value that sampling resistor 100 two ends allow; the ratio of first reference value and sampling resistor 100 is the over-current protection point of the first protection module 110, and over-current protection point is the current value of the charge circuit permission maximum current slightly larger than defibrillation monitor.Therefore, when sample voltage value is greater than first reference value, be considered as charge circuit overcurrent.Be appreciated that in other embodiments, the first protection module 110 also directly can obtain current data and send to processing module 130, and now the first reference value of processing module 130 is the current value of over-current protection point.
In the present embodiment, current detector 113 adopts differential signal input function built-in mould number converter, the sample voltage value on sampling resistor 100 can be gathered, when the sample voltage value that processing module 130 obtains is greater than first reference value, send power cutoff signal to control terminal with power cutoff.By carrying out the sampling of voltage to sampling resistor 100, can the electric current of supervisory circuit, when sample voltage value is greater than first reference value, namely occurred overcurrent condition in charge circuit, processing module 130 sends power cutoff signal, achieves the overcurrent protection of software levels.
The resistance of sampling resistor 100 can artificial selection, and the resistance of the over-current protection point that first reference value is arranged as required and sampling resistor 100 determines.Such as, in the present embodiment, the maximum current that defibrillation monitor allows is 10A, and the over-current protection point of the first protection module 110 is 12A, according to formula (1):
I
lim＝V/R
Wherein, I
limcorresponding over-current protection point, the corresponding first reference value of V, R is the resistance of sampling resistor 100.Choosing sampling resistor 100 is 0.003 ohm, then first reference value is 0.036 volt.Namely, when the sample voltage value at sampling resistor 100 two ends is greater than 0.036V, be considered as overcurrent, processing module 130 sends power cutoff signal.
First protection module 110 also comprises timing unit (not shown), sends sample voltage value for arranging interval time to make current detector 113 timing to processing module 130.In the present embodiment, timing unit is the timer of single-chip microcomputer, and the interval time of timer is 5ms, and namely current detector 113 sends sample voltage value every 5ms to processing module 130.Arrange suitable interval time by timing unit, achieve sampling sample voltage value being carried out to interval, processing module 130 does not need to process the sample voltage value in each moment, thus alleviates the burden of processing module 130.Be appreciated that in other examples, interval time also can be set to other suitable numerical value, can judge over-current phenomenon avoidance timely as long as can not affect.
First protection module 110 also comprises counting unit (not shown); the number of times that sample voltage value for collecting current detector 113 is greater than first reference value counts to get overcurrent read-around ratio; and overcurrent read-around ratio is sent to processing module 130; processing module 130 correspondence be provided with pre-determined number, send power cutoff signal when overcurrent read-around ratio is greater than pre-determined number.In the present embodiment; counting unit is the counter of single-chip microcomputer; the pre-determined number of processing module 130 is 10 times; as mentioned above; interval time is 5ms; the over-current protection point of the first protection module 110 is 12A, then, when in charge circuit, electric current is greater than 12A, 50ms post-processing module 130 sends power cutoff signal to disconnect charge circuit so that proterctive equipment.The setting of counting unit, makes when circuit generation overcurrent being detected, can't power cutoff immediately, but is provided with time of delay, avoid because in circuit the moment of electric current the unstable and situation of open circuit, add the stability of overcurrent protection.
With reference to figure 4, the second protection module 120 comprises prosecution unit 123, and prosecution unit 123 is parallel to sampling resistor 100 two ends, and prosecution unit 123 is for detecting the sample voltage value at sampling resistor 100 two ends.Prosecution unit 123 is provided with the second fiducial value, and when sample voltage value is greater than the second fiducial value, the electric current namely in charge circuit is greater than current value corresponding to the second fiducial value, and prosecution unit 123 controls to disconnect charge circuit.Second protection module 120 detects the sample voltage value of sampling resistor 100 by prosecution unit 123, disconnect charge circuit, achieve the overcurrent protection of hardware level when sample voltage value is greater than the second reference voltage value.Be appreciated that, in other embodiments, prosecution unit 123 also may be used for the magnitude of voltage detecting other resistance two ends, as long as the magnitude of voltage detected can reflect the electric current in charge circuit, such as, for detecting the voltage at the other resistance two ends of connecting with sampling resistor 100.
Sample voltage value is the actual voltage value at sampling resistor 100 two ends, and in the present embodiment, the second fiducial value is the maximum voltage value that sampling resistor 100 two ends allow, and the ratio of the second fiducial value and sampling resistor 100 is the over-current protection point of the second protection module 120.Therefore, when sample voltage value is greater than the second fiducial value, be considered as charge circuit overcurrent.Be appreciated that in other embodiments, prosecution unit 123 can also detect the electric current of sampling resistor 100, and correspondingly, the second fiducial value is the current value of over-current protection point.
Particularly, prosecution unit 123 comprised stream controller 1231 and switching tube 1235, and the input of switching tube 1235 connects sampling resistor 100, and output connects the charge circuit of defibrillation monitor, control end connected stream controller 1231, crossed stream controller 1231 in parallel with sampling resistor 100.Cross stream controller 1231 and be provided with the second fiducial value, and when sample voltage value is greater than the second fiducial value cut-off switch pipe 1235.Wherein in an embodiment, cross stream controller 1231 also connection handling module 130, when sample voltage value is greater than the second fiducial value, cross stream controller 1231 control switch pipe 1235 to disconnect, thus the charge circuit of defibrillation monitor disconnects, send over-current signal to processing module 130, processing module 130 sends alarm signal to control terminal according to over-current signal simultaneously, control terminal sends warning message, so that staff goes and finds out what's going in time.Second protection module 120 adopts the mode of hardware to reach the effect of overcurrent protection, and when the first protection module 110 lost efficacy, the mistake of charge circuit failed to be convened for lack of a quorum triggering second protection module 120, improves the safety and reliability of equipment.
Particularly, cross stream controller 1231 and comprise over-current detection subelement (not shown) and switch control rule subelement (not shown).Over-current detection subelement comprises voltage comparator, the in-phase input end of voltage comparator inputs the second fiducial value, the sample voltage value at inverting input input sample resistance 100 two ends, when sample voltage value is greater than the second fiducial value, namely there is overcurrent, the voltage that the voltage that inverting input inputs inputs higher than in-phase input end, then voltage comparator reversion, over-current detection subelement sends over-current signal to processing module 130.Simultaneous Switching control unit output low level, then switching tube 1235 disconnects, thus the charge circuit connecting defibrillation monitor disconnects, and plays the effect of overcurrent protection.
Preferably, prosecution unit 123 also comprises timer capacitor 1233, and timer capacitor 1233 one end connected stream controller 1231, other end ground connection.Correspondingly, cross stream controller 1231 and also comprise flow delay subelement (not shown), when sample voltage value is greater than the second fiducial value, cross stream controller 1231 to control timer capacitor 1233 and charge, when timer capacitor 1233 is full of electricity, crosses stream controller 1231 control switch pipe 1235 and disconnect.That is, timer capacitor 1233 is to there being a full piezoelectric voltage value, when the charging voltage of timer capacitor 1233 reaches full piezoelectric voltage value, and switch control unit output low level, thus switching tube 1235 disconnects, and charge circuit is disconnected, proterctive equipment is not damaged.Timer capacitor 1233 and cross the setting of flow delay subelement, avoid because in circuit the moment of electric current the unstable and situation of open circuit, add the stability of overcurrent protection.
The capacitance size of timer capacitor 1233 is selected as required.Such as, in the present embodiment; the maximum current that the charge circuit of defibrillation monitor described above allows is 10A; the over-current protection point of the first protection module 110 is 12A; the over-current protection point then arranging the second protection module 120 is 14A; the resistance of sampling resistor 100 is 0.003 ohm, according to above-mentioned formula (1), wherein; the resistance of the corresponding sampling resistor 100 of R, I
limthe current value of corresponding second protection point, can obtain, the second reference voltage value of corresponding sampling resistor 100 and over-current protection point is 0.042V.In the present embodiment, the full piezoelectric voltage value of timer capacitor 1233 is 4V, and the charging current of timer capacitor 1233 is 25uA, and the capacitance size choosing timer capacitor 1233 is 10NF, and timer capacitor 1233 required time of charging can be obtained by formula (2):
T＝C*U/I
Wherein, T is the charging interval, and full piezoelectric voltage value 4V, the I of C to be the capacitance size 10NF of timer capacitor 1233, U be timer capacitor 1233 are the charging current 25uA of timer capacitor 1233, and can obtain the charging interval is 1.6ms.Therefore, the time of delay crossing flow delay subelement is 1.6ms, and namely after the 1.6ms of the electric current generation overcurrent of defibrillation charge circuit, when electric current continues to occur overcurrent, switch control rule subelement output low level thus switching tube 1235 disconnect, and charge circuit is disconnected.
Processing module 130 comprises data capture unit (not shown) and control unit (not shown); data capture unit connects the first protection module 110 in order to obtain voltage data or current data; control unit connection data acquiring unit and the second protection module 120; control unit is provided with first reference value; send power cutoff signal when voltage data or current data are greater than first reference value, and/or send alarm signal according to the over-current signal that the second protection module 120 sends.In the present embodiment, what data capture unit obtained is the sample voltage value at sampling resistor 100 two ends.In the present embodiment, timing unit and the counting unit of data capture unit, control unit, above-mentioned first protection module 110 are all in same single-chip microcomputer.
Processing module 130 is connected with the first protection module 110 by communication interface.Concrete, communication interface is IIC interface.
The defibrillation charging overcurrent protective device of above-mentioned a kind of defibrillation monitor, on the one hand, the first protection module 110 and processing module 130 form one-level overcurrent protection, and when circuit generation overcurrent, processing module 130 sends power cutoff signal so that timely power cutoff; On the other hand, the second protection module 120 forms the overcurrent protection of another grade, and the timely open circuit when circuit generation overcurrent, makes electric current too much can not cause damage to equipment.By two-stage overcurrent protection, the safety and stability of charge circuit is higher, improves the safety and reliability of equipment greatly.
A kind of defibrillation monitor, comprise defibrillation charging overcurrent protective device and the charge circuit of above-mentioned defibrillation monitor, defibrillation charging overcurrent protective device is connected with charge circuit.Owing to comprising the defibrillation charging overcurrent protective device of above-mentioned defibrillation monitor, make the safety and stability of charge circuit higher, improve the safety and reliability of equipment greatly.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the defibrillation charging overcurrent protective device of a defibrillation monitor, it is characterized in that, comprise the first protection module, the second protection module and processing module, described first protection module and described second protection module are series in the charge circuit of defibrillation monitor, and described first protection module also connects described processing module;
Described first protection module is used for sending voltage data or current data to described processing module, and described processing module is provided with first reference value, and sends power cutoff signal when described voltage data or current data are greater than described first reference value;
Described second protection module is provided with the second fiducial value, and when the electric current in described charge circuit is greater than current value corresponding to described second fiducial value, described second protection module disconnects described charge circuit.
2. the defibrillation charging overcurrent protective device of defibrillation monitor according to claim 1, it is characterized in that, described second fiducial value is greater than described first reference value.
3. the defibrillation charging overcurrent protective device of defibrillation monitor according to claim 1; it is characterized in that; described second protection module also connects described processing module; when described second protection module disconnects described charge circuit; described second protection module sends over-current signal to described processing module, and described processing module sends alarm signal according to described over-current signal.
4. the defibrillation charging overcurrent protective device of defibrillation monitor according to claim 3; it is characterized in that; also comprise the control terminal connecting described processing module; for receiving described power cutoff signal and alarm signal, and according to described power cutoff signal open circuit, send warning message according to described alarm signal.
5. the defibrillation charging overcurrent protective device of defibrillation monitor according to claim 1; it is characterized in that; the defibrillation charging overcurrent protective device of described defibrillation monitor comprises sampling resistor; described sampling resistor is series in described charge circuit; described first protection module comprises the current detector of the sample voltage value for detecting described sampling resistor two ends; described current detector is in parallel with described sampling resistor; and described current detector connects described processing module, and send described sample voltage value to described processing module.
6. the defibrillation charging overcurrent protective device of defibrillation monitor according to claim 5, it is characterized in that, described first protection module also comprises timing unit and counting unit, and described timing unit is used for arranging and sends described sample voltage value to make the timing of described current detector to described processing module interval time; The number of times that described counting unit is used for being greater than the described sample voltage value that described current detector collects described first reference value counts to get overcurrent read-around ratio, and described overcurrent read-around ratio is sent to described processing module, what described processing module was corresponding is provided with pre-determined number, sends described power cutoff signal when described overcurrent read-around ratio is greater than described pre-determined number.
7. the defibrillation charging overcurrent protective device of defibrillation monitor according to claim 5, it is characterized in that, described second protection module comprises prosecution unit, and described prosecution unit is parallel to described sampling resistor two ends, for detecting the described sample voltage value at described sampling resistor two ends; Described prosecution unit is provided with described second fiducial value, and when described sample voltage value is greater than described second fiducial value, described prosecution unit controls disconnects described charge circuit.
8. the defibrillation charging overcurrent protective device of defibrillation monitor according to claim 7, it is characterized in that, described prosecution unit comprised stream controller and switching tube, the input of described switching tube connects described sampling resistor, output connects described charge circuit, control end connects described stream controller excessively, and described stream controller is in parallel with described sampling resistor excessively; Described stream controller of crossing is provided with the second fiducial value, and disconnects described switching tube when described sample voltage value is greater than described second fiducial value.
9. the defibrillation charging overcurrent protective device of defibrillation monitor according to claim 8, it is characterized in that, described prosecution unit also comprises timer capacitor, and the connection of described timer capacitor one end is described crosses stream controller, other end ground connection; When described sample voltage value is greater than described second fiducial value, described stream controller of crossing controls the charging of described timer capacitor, and when described timer capacitor is full of electricity, described stream controller of crossing controls the disconnection of described switching tube.
10. a defibrillation monitor, is characterized in that, comprises defibrillation charging overcurrent protective device and the charge circuit of the defibrillation monitor as described in any one of claim 1-9, and described defibrillation charging overcurrent protective device is connected with described charge circuit.
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| CN106655101A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Household electrical appliance and over-current protection device and method of power factor corrector |
| CN106655102A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Power factor corrector over-current protection device and home appliance |
| WO2019080098A1 (en) * | 2017-10-27 | 2019-05-02 | 深圳迈瑞生物医疗电子股份有限公司 | Defibrillator, state detection management method, state detection management system and device |
| CN109966644A (en) * | 2019-03-21 | 2019-07-05 | 百纳川医疗科技(苏州)有限公司 | Defibrillator discharge protection circuit, defibrillator discharge system and defibrillator |
| CN109966644B (en) * | 2019-03-21 | 2023-05-12 | 百纳川医疗科技(苏州)有限公司 | Discharge protection circuit for defibrillator, defibrillator discharge system and defibrillator |
| CN114076904A (en) * | 2020-08-19 | 2022-02-22 | 深圳市理邦精密仪器股份有限公司 | Protection circuit, electrical stimulation device and protection method |
| CN112736852A (en) * | 2020-12-29 | 2021-04-30 | 联合汽车电子有限公司 | Overcurrent detection protection circuit |
| CN112736852B (en) * | 2020-12-29 | 2024-04-26 | 联合汽车电子有限公司 | Overcurrent detection protection circuit |
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