CN213069138U - Electrode plate falling detection circuit of intermediate frequency therapeutic instrument - Google Patents
Electrode plate falling detection circuit of intermediate frequency therapeutic instrument Download PDFInfo
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- CN213069138U CN213069138U CN202021456039.1U CN202021456039U CN213069138U CN 213069138 U CN213069138 U CN 213069138U CN 202021456039 U CN202021456039 U CN 202021456039U CN 213069138 U CN213069138 U CN 213069138U
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Abstract
The utility model provides an electrode plate falling detection circuit of an intermediate frequency therapeutic apparatus, which comprises a Hall current detection chip U1, wherein the negative end of the sampling current is connected with the electrode plate, the voltage end of the Hall current detection chip U1 is connected with the positive electrode of a direct current power supply and one end of a capacitor C41, the signal output end of the Hall current detection chip U1 is connected with one end of a resistor R37, and the other end of the resistor R37 is connected with the reverse input pin of a comparator U2; a fifth pin of the comparator U2 is connected with the positive electrode of the direct-current power supply, one end of a resistor R38 and one end of a capacitor C42, an output pin of the comparator U2 is connected with the other end of a resistor R38 and one end of a resistor R43, and the other end of the resistor R43 is connected with an MCU detection port; a forward input pin of the comparator U2 is connected with one end of a resistor R42, a voltage regulator U3 reference base REF and a cathode CAT; the other end of the resistor R42 is connected with the positive pole of the direct current power supply. The circuit can improve the detection precision of the falling detection circuit.
Description
Technical Field
The utility model relates to an analgesia treatment pastes product, specific theory has related to an intermediate frequency therapeutic instrument electrode slice detection circuitry that drops.
Background
The medium frequency therapeutic apparatus is a medical apparatus which is based on the meridian theory of traditional Chinese medicine and combines with modern electronic technology and utilizes pulse waveform to stimulate the acupuncture points of human body to achieve the purpose of treatment and health care. The medium frequency current output by the medium frequency therapeutic apparatus stimulates local muscles, nerves and blood vessels, promotes blood circulation and increases the blood supply and oxygen supply of local tissues. When the low-frequency current stimulates the acupuncture points and pain points, the tremor feeling and the muscle tremor can be generated, the thick fibers are excited, the gate for transmitting the pain feeling is closed, the pain valve is improved, and the endogenous morphine-like substance is released to play the role of relieving pain. Patients with hemiplegia and traumatic brain injury can relieve muscle spasm by repeated medium-frequency electrical stimulation, and reestablish neural network in cerebral cortex.
In the treatment process, the falling off of the output electrode plate of the intermediate frequency therapeutic apparatus and other accidents easily occur, so that the rehabilitation effect is influenced.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: an electrode plate falling detection circuit of an intermediate frequency therapeutic apparatus comprises a Hall current detection chip U1, a voltage stabilization source U3 and a comparator U2 which are electrically connected;
the negative sampling current terminal of the Hall current detection chip U1 is connected with the electrode slice, the power supply voltage terminal of the Hall current detection chip U1 is connected with the positive electrode of the direct current power supply and one end of the capacitor C41, and the other end of the capacitor C41 is grounded; the positive end and the NC end of the sampling current of the Hall current detection chip U1 are not connected; the grounding end of the Hall current detection chip U1 is grounded; the signal output end of the Hall current detection chip U1 is connected with one end of a resistor R37, and the other end of the resistor R37 is connected with the reverse input pin of a comparator U2;
a fifth pin of the comparator U2 is connected with the anode of an external direct-current power supply, one end of a resistor R38 and one end of a capacitor C42, and the other end of the capacitor C42 is grounded;
the second pin of the comparator U2 is grounded; an output pin of the comparator U2 is connected with the other end of the resistor R38 and one end of the resistor R43, and the other end of the resistor R43 is connected with the MCU detection port;
a forward input pin of the comparator U2 is respectively connected with one end of a resistor R42, a reference base REF of a voltage regulator source U3 and a cathode CAT, and AN anode AN of the voltage regulator source U3 is grounded; the other end of the resistor R42 is connected with the anode of the external direct current power supply.
Based on the above, the voltage regulator U3 is a voltage regulator TL431, the hall current detection chip U1 is a hall current detection chip CC6902, and the comparator U2 is a TL331 comparator.
Based on the above, the resistance of the resistor R37 is 10K Ω, the resistance of the resistor R42 is 10K Ω, and the resistance of the resistor R38 is 4.7K Ω.
Based on the above, the capacitance of the capacitor C41 is 1 μ F, and the capacitance of the capacitor C42 is 104 capacitors.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular to the electrode plate falling detection circuit of the intermediate frequency therapeutic apparatus provided by the utility model, the Hall current detection chip U1 (CC 6902) is used for detecting the current in the electrode plate circuit of the input end, and the output end outputs a voltage value with 2.5V as the benchmark; the voltage stabilizing source U3(TL431) outputs a voltage of 2.5V, the voltage is used as a reference voltage of a U2 (TL 331) comparator and is compared with the output voltage value of the Hall current detection chip U1, and therefore high and low detection levels are output to the MCU, and the state of an electrode slice is detected. Whether the electrode plate of the intermediate frequency therapeutic apparatus drops or not can be detected in time, and the effect of improving the accuracy of drop detection of the electrode plate of the intermediate frequency therapeutic apparatus is achieved.
Drawings
Fig. 1 is a schematic structural diagram of the electrode plate falling detection circuit of the intermediate frequency therapeutic apparatus provided by the utility model.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
As shown in fig. 1, the circuit for detecting electrode plate falling of the intermediate frequency therapeutic apparatus comprises a hall current detection chip U1, a voltage regulator U3 and a comparator U2 which are electrically connected.
The negative sampling current terminal of the Hall current detection chip U1 is connected with the electrode slice, the power supply voltage terminal of the Hall current detection chip U1 is connected with the positive electrode of the direct current power supply and one end of the capacitor C41, and the other end of the capacitor C41 is grounded; the positive end and the NC end of the sampling current of the Hall current detection chip U1 are not connected; the grounding end of the Hall current detection chip U1 is grounded; the signal output end of the Hall current detection chip U1 is connected with one end of a resistor R37, and the other end of the resistor R37 is connected with the reverse input pin of a comparator U2;
the fifth pin of the comparator U2 is connected to the positive terminal of the external dc power supply, one end of the resistor R38, and one end of the capacitor C42, and the other end of the capacitor C42 is grounded.
The second pin of the comparator U2 is grounded; an output pin of the comparator U2 is connected with the other end of the resistor R38 and one end of the resistor R43, and the other end of the resistor R43 is connected with the MCU detection port.
A forward input pin of the comparator U2 is respectively connected with one end of a resistor R42, a reference base REF of a voltage regulator source U3 and a cathode CAT, and AN anode AN of the voltage regulator source U3 is grounded; the other end of the resistor R42 is connected with the anode of the external direct current power supply.
Specifically, in this embodiment, the voltage regulator U3 is a voltage regulator TL431, the hall current detection chip U1 is a hall current detection chip CC6902, and the comparator U2 is a TL331 comparator.
The resistance value of the resistor R37 is 10K omega, the resistance value of the resistor R42 is 10K omega, and the resistance value of the resistor R38 is 4.7K omega.
The capacitance of the capacitor C41 is 1 muF, and the capacitance C42 is 104 capacitors.
Specifically, the specific working process of the electrode plate falling detection circuit of the intermediate frequency therapeutic apparatus is as follows:
firstly, a Hall current detection chip U1 (CC 6902) detects the current in an electrode plate circuit at an input end, and an output end outputs a voltage value taking 2.5V as a reference; the voltage stabilizing source U3(TL431) outputs a voltage of 2.5V, the voltage is used as a reference voltage of a U2 (TL 331) comparator and is compared with the output voltage value of the Hall current detection chip U1, and therefore high and low detection levels are output to the MCU, and the state of an electrode slice is detected.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (4)
1. The utility model provides a medium frequency therapy appearance electrode slice detection circuitry that drops which characterized in that: the Hall current detection circuit comprises a Hall current detection chip U1, a voltage stabilizing source U3 and a comparator U2 which are electrically connected;
the negative sampling current terminal of the Hall current detection chip U1 is connected with the electrode slice, the power supply voltage terminal of the Hall current detection chip U1 is connected with the positive electrode of the direct current power supply and one end of the capacitor C41, and the other end of the capacitor C41 is grounded; the positive end and the NC end of the sampling current of the Hall current detection chip U1 are not connected; the grounding end of the Hall current detection chip U1 is grounded; the signal output end of the Hall current detection chip U1 is connected with one end of a resistor R37, and the other end of the resistor R37 is connected with the reverse input pin of a comparator U2;
a fifth pin of the comparator U2 is connected with the anode of an external direct-current power supply, one end of a resistor R38 and one end of a capacitor C42, and the other end of the capacitor C42 is grounded;
the second pin of the comparator U2 is grounded; an output pin of the comparator U2 is connected with the other end of the resistor R38 and one end of the resistor R43, and the other end of the resistor R43 is connected with the MCU detection port;
a forward input pin of the comparator U2 is respectively connected with one end of a resistor R42, a reference base REF of a voltage regulator source U3 and a cathode CAT, and AN anode AN of the voltage regulator source U3 is grounded; the other end of the resistor R42 is connected with the anode of the external direct current power supply.
2. The circuit for detecting electrode plate falling of intermediate frequency therapeutic apparatus according to claim 1, wherein: the voltage stabilizing source U3 is a voltage stabilizing source TL431, the Hall current detection chip U1 is a Hall current detection chip CC6902, and the comparator U2 is a TL331 comparator.
3. The circuit for detecting electrode plate falling of intermediate frequency therapeutic apparatus according to claim 2, wherein: the resistance value of the resistor R37 is 10K omega, the resistance value of the resistor R42 is 10K omega, and the resistance value of the resistor R38 is 4.7K omega.
4. The circuit for detecting electrode plate falling of intermediate frequency therapeutic apparatus according to claim 3, wherein: the capacitance of the capacitor C41 is 1 muF, and the capacitance C42 is 104 capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021456039.1U CN213069138U (en) | 2020-07-22 | 2020-07-22 | Electrode plate falling detection circuit of intermediate frequency therapeutic instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021456039.1U CN213069138U (en) | 2020-07-22 | 2020-07-22 | Electrode plate falling detection circuit of intermediate frequency therapeutic instrument |
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| CN213069138U true CN213069138U (en) | 2021-04-27 |
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| CN202021456039.1U Active CN213069138U (en) | 2020-07-22 | 2020-07-22 | Electrode plate falling detection circuit of intermediate frequency therapeutic instrument |
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