CN219978426U - Electrode slice drop detection circuit - Google Patents
Electrode slice drop detection circuit Download PDFInfo
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- CN219978426U CN219978426U CN202320741844.6U CN202320741844U CN219978426U CN 219978426 U CN219978426 U CN 219978426U CN 202320741844 U CN202320741844 U CN 202320741844U CN 219978426 U CN219978426 U CN 219978426U
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 2
- 230000000638 stimulation Effects 0.000 description 10
- 230000001939 inductive effect Effects 0.000 description 3
- 238000000554 physical therapy Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
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Abstract
The electrode slice falling detection circuit comprises an output transformer T, an electrode slice P4 and an electrode slice P5; the electrode plate P4 is connected to one end of an output coil of the output transformer, the cathode of the diode D2 is connected with the anode of the diode D1, the other end of the output coil of one end of the output coil of the output transformer is connected between the diode D2 and the diode D1, the cathode of the diode D4 is connected with the anode of the diode D3, the electrode plate P5 is connected between the diode D4 and the diode D3, the cathodes of the diode D1, the diode D3 and the diode D5 are connected, the anodes of the diode D2, the diode D4 and the diode D5 are connected, one end of the resistor R1 is connected with the cathode of the diode D5, and the other end is connected with the 1 pin of the optocoupler U1; the positive pole of the voltage stabilizing diode is connected with the 2 pins of the optical coupler U1, the 3 pins of the optical coupler U1 are grounded, and the 4 pins of the optical coupler U1 are connected with the falling detection port P3. The utility model has simple circuit.
Description
Technical Field
The utility model relates to a circuit, in particular to an electrode slice falling detection circuit in electrical stimulation equipment, and belongs to the technical field of circuits.
Background
The electrode plate of medium frequency, low frequency electro-stimulation physiotherapy equipment is pasted on human body surface in the treatment, can take place to drop under the weak circumstances of external force or adhesion, on the one hand can not reach physiotherapy effect when dropping, on the other hand because the electrode plate is connected on output of output transformer, output transformer's input connection stimulus drive circuit, load current is close to zero after dropping, there is the hidden danger of high voltage like this, the common detection electrode plate drops in prior art is in the mutual inductance transformer of electric stimulation electric loop cluster, when the return circuit that electric stimulation circuit and external electrode plate formed is disconnected, the signal connection singlechip, the singlechip just considers as the electrode plate to drop in case this signal is not detected, this kind of scheme has more defects in practical application discovery mainly shows: 1. under the condition of small-amplitude electric stimulation output, the induced voltage is weak, so that the electrode plate is easy to fall off without falling off, and false alarm is caused; 2. because the mutual inductance transformer is an inductive element, the inductive element is introduced into the electric stimulation circuit to influence the electric stimulation waveform, so that the waveform is distorted, and meanwhile, the amplitude difference of the electric stimulation output at different frequencies is huge due to amplitude-frequency characteristics; 3. the transformer has huge volume, is inconvenient for miniaturization and has higher manufacturing cost. 4. When the volume is small, the difficulty in achieving the medical grade requirement of the isolation degree is high because the mutual inductor coil is connected with the application part; chinese patent application number 2022211901514 discloses an electrode slice falling detection device and a medical apparatus, which judges whether an electrode slice falls off according to a level signal detected and displayed by a singlechip port, wherein the detection device depends on a specific electric stimulation pulse control circuit, and has poor universality; chinese patent No. 2021229832552 discloses an electrode plate falling detection circuit, which comprises a signal acquisition unit, a detection circuit unit, an amplifier, a tertiary tube and the like, but the circuit is obviously more complex, chinese patent application No. 2020214560391 discloses an electrode plate falling detection circuit of an intermediate frequency therapeutic apparatus, which uses a hall current detection chip, a regulated power supply and a comparator, and the circuit has higher cost and is difficult to miniaturize.
Disclosure of Invention
The utility model aims to overcome the problems of the prior middle-low frequency physiotherapy instrument adopting electrode slices and provides an electrode slice falling detection circuit.
In order to achieve the purpose of the utility model, the following technical scheme is adopted: the electrode slice falling detection circuit comprises an output transformer T, an electrode slice P4 and an electrode slice P5; the electrode plate P4 is connected to one end of an output coil of the output transformer, the cathode of the diode D2 is connected with the anode of the diode D1, the other end of the output coil of one end of the output coil of the output transformer is connected between the diode D2 and the diode D1, the cathode of the diode D4 is connected with the anode of the diode D3, the electrode plate P5 is connected between the diode D4 and the diode D3, the cathodes of the diode D1, the diode D3 and the diode D5 are connected, the anodes of the diode D2, the diode D4 and the diode D5 are connected, one end of the resistor R1 is connected with the cathode of the diode D5, and the other end is connected with the 1 pin of the optocoupler U1; the positive electrode of the voltage stabilizing diode is connected with the 2 pin of the optical coupler U1, the 3 pin of the optical coupler U1 is grounded, and the 4 pin of the optical coupler U1 is connected with the falling detection port P3; the drop-off detection port P3 is connected with the port of the singlechip, one end of the pull-up resistor R2 is connected with a 3.3V power supply, the other end of the pull-up resistor R2 is connected with the drop-off detection port P3, and the zener diode adopts 3V/3W.
Further; the optocoupler is EL357, and the diodes D1, D2, D3 and D4 are FR107.
The utility model has the outstanding characteristics of simple circuit, low cost, small volume, no inductive element in the circuit, and the adoption of the prior art can judge whether the electrode slice falls off or not by the level of the port potential of the singlechip.
Drawings
Fig. 1 is a schematic diagram of the circuit principle of the present utility model.
Detailed Description
In order to more fully explain the practice of the utility model, examples of the practice of the utility model are provided. These examples are merely illustrative of the present utility model and do not limit the scope of the utility model.
The seed electrode slice falling detection circuit comprises an output transformer T, an electrode slice P4 and an electrode slice P5; the method is characterized in that: the electrode plate P4 is connected to one end of an output coil of the output transformer, the cathode of the diode D2 is connected with the anode of the diode D1, the other end of the output coil of one end of the output coil of the output transformer is connected between the diode D2 and the diode D1, the cathode of the diode D4 is connected with the anode of the diode D3, the electrode plate P5 is connected between the diode D4 and the diode D3, the diode D1, the diode D2, the diode D3 and the model FR107 of the diode D4 are respectively connected with the cathodes of the diode D1, the diode D3 and the voltage stabilizing diode D5, the anodes of the diode D2, the diode D4 and the voltage stabilizing diode D5 are respectively connected, one end of the resistor R1 is connected with the cathode of the voltage stabilizing diode D5, and the other end of the resistor R1 is connected with the 1 pin of the optical coupler U1; the positive electrode of the voltage stabilizing diode is connected with the 2 pin of the optical coupler U1, the 3 pin of the optical coupler U1 is grounded, and the 4 pin of the optical coupler U1 is connected with the falling detection port P3; the drop detection port P3 is connected with the singlechip port, the model of the optocoupler is EL357, the 1 pin of the optocoupler is the anode of a light-emitting diode in the optocoupler, the 2 pin is the cathode of the light-emitting diode, the 3 pin is the emitter of a three-stage tube in the optocoupler, the 4 pin is the collector, one end of the pull-up resistor R2 is connected with a 3.3V power supply, the other end of the pull-up resistor R2 is connected with the drop detection port P3, and the zener diode adopts 3V/3W.
In the circuit, when the electrode slice is attached to the skin, the electric stimulation pulse is output by the transformer T and passes through the diode D1, the diode D2, the diode D3 and the diode D4 to form a circuit with the electrode slice to form a loop, a 3V fixed voltage drop is formed on the voltage stabilizing diode D5 and is subjected to R1 current limiting, the photoelectric isolation coupler is driven, the optical signal is coupled by the U1 photoelectric coupler and then is sent to the P3 end, the potential of the P3 end can be lowered, when the electrode slice falls off, the potential of the P3 end can be raised, the P3 end is connected to the singlechip, and the singlechip can judge whether the electrode slice falls off or not by collecting signals of the P3 end. R2 is a pull-up resistor.
The specific detection principle is as follows: because the electric stimulation is an alternating current signal, the output is composed of a positive half cycle and a negative half cycle, the positive half cycle current is output to the P4 current through the upper conducting wire generated by the transformer T, flows through the electrode plate P5, flows through the diode D3 and then flows back to the transformer through the diode D2 after passing through the voltage stabilizing diode D5, the negative half cycle current is output to the diode D1 through the lower conducting wire generated by the transformer T, then flows through the electrode plate P5 and flows back to the transformer through the P4 electrode plate after passing through the voltage stabilizing diode D5, no matter in the positive half cycle and the negative half cycle, the voltage is limited by the resistor R1, the LED on the left side of the optocoupler U1 is lightened, the potential of the P3 port can be pulled down after the right side photoelectric circuit of the U1 receives light, whether the electrode plate drops or not can be known through detecting the current on the P3 end, and whether the electrode plate drops or not is judged to be the current existing technology.
Having described embodiments of the present utility model in detail, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the scope and spirit of the utility model as defined in the appended claims, and any simple, equivalent changes and modifications to the above examples are intended to be within the scope of the present utility model and the utility model is not limited to the embodiments as set forth in the specification.
Claims (2)
1. The electrode slice falling detection circuit comprises an output transformer T, an electrode slice P4 and an electrode slice P5; the method is characterized in that: the electrode plate P4 is connected to one end of an output coil of the output transformer, the cathode of the diode D2 is connected with the anode of the diode D1, the other end of the output coil of one end of the output coil of the output transformer is connected between the diode D2 and the diode D1, the cathode of the diode D4 is connected with the anode of the diode D3, the electrode plate P5 is connected between the diode D4 and the diode D3, the cathodes of the diode D1, the diode D3 and the diode D5 are connected, the anodes of the diode D2, the diode D4 and the diode D5 are connected, one end of the resistor R1 is connected with the cathode of the diode D5, and the other end is connected with the 1 pin of the optocoupler U1; the positive electrode of the voltage stabilizing diode is connected with the 2 pin of the optical coupler U1, the 3 pin of the optical coupler U1 is grounded, and the 4 pin of the optical coupler U1 is connected with the falling detection port P3; the drop-off detection port P3 is connected with the port of the singlechip, one end of the pull-up resistor R2 is connected with a 3.3V power supply, the other end of the pull-up resistor R2 is connected with the drop-off detection port P3, and the zener diode adopts 3V/3W.
2. The electrode tab drop detection circuit of claim 1, wherein: the model of the optocoupler is EL357, and the models of the diode D1, the diode D2, the diode D3 and the diode D4 are FR107.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320741844.6U CN219978426U (en) | 2023-04-07 | 2023-04-07 | Electrode slice drop detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320741844.6U CN219978426U (en) | 2023-04-07 | 2023-04-07 | Electrode slice drop detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219978426U true CN219978426U (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320741844.6U Active CN219978426U (en) | 2023-04-07 | 2023-04-07 | Electrode slice drop detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219978426U (en) |
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2023
- 2023-04-07 CN CN202320741844.6U patent/CN219978426U/en active Active
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