Electric pulse physiotherapy lead shedding detection circuit

Abstract

The utility model discloses a lead falling detection circuit for electric pulse physiotherapy, and belongs to the field of electric pulse physiotherapy. The detection circuit comprises an H-bridge discharge module and a lead falling detection module, the lead falling detection module comprises a detection unit, a voltage amplitude limiting unit and a signal expansion unit, the voltage amplitude limiting unit and the signal expansion unit are connected into the H-bridge discharge module, and the detection unit is connected with the signal expansion unit. When the voltage of the electric pulse signal is increased, the voltage amplitude limiting unit can perform voltage amplitude limiting, so that the voltage drop of the lead falling detection module is very small, and the influence on the output voltage of the electric pulse is reduced; when the voltage of the electric pulse signal is reduced, the voltage drop of the voltage amplitude limiting unit is very small and cannot reach a detection threshold value, at the moment, the signal expansion unit can form a small signal path, the lead falling detection range can be expanded, and it is guaranteed that the detection unit can work normally.

Description

Technical Field

[0001] The utility model belongs to the field of electro - pulse physiotherapy, and particularly relates to an electro - pulse physiotherapy lead detachment detection circuit. Background Art

[0002] The electro - pulse physiotherapy method is an innovative medical technology. It can effectively simulate various techniques of traditional Chinese medicine, including pressing, massaging, pushing, grasping, kneading, rubbing, etc. These techniques are widely used in traditional Chinese medicine to promote health, relieve pain and improve body functions. Through the stimulation of micro - electric pulses, the human body can receive precise treatment at designated positions, such as tissues like skin, muscles, nerves and blood vessels. This method can not only effectively improve metabolism, relax tense muscles, but also help regulate the body fluid environment, promote blood circulation throughout the body, and help dredge the meridians, thus achieving an all - round health assistance effect.

[0003] [[ID=II]]During the process of electro - pulse physiotherapy, first, the lead electrode patches need to be precisely attached to the patient's skin surface (load). These electrode patches are controlled by a controller and continuously emit micro - electric pulses to stimulate the set parts. Although this process is efficient, the lead electrode patches may fall off during use due to movement or other reasons, which will undoubtedly affect the treatment effect. Therefore, physiotherapy products usually detect lead detachment through circuit design.

[0004] In the prior art, electro - pulse discharge usually uses a series - connected resistor Rd to detect lead detachment. When the load impedance Rload is relatively small and does not satisfy the condition Rd << Rload, at this time, Rd will consume a large part of the power, resulting in a reduction in the power input to the load Rload and affecting the output power of the electro - pulse of the product. Summary of the Utility Model

[0005] To solve the above problems, the primary object of the utility model is to provide an electro - pulse physiotherapy lead detachment detection circuit, which can reduce the influence of lead detachment detection on the output power of the discharge pulse;

[0006] Another object of the utility model is to provide an electro - pulse physiotherapy lead detachment detection circuit, which can improve the sensitivity and stability of lead detachment detection.

[0007] To achieve the above objects, the technical solution of the utility model is as follows:

[0008] The utility model provides an electro - pulse physiotherapy lead detachment detection circuit, including: an H - bridge discharge module, a lead detachment detection module. The lead detachment detection module includes a detection unit, a voltage - limiting unit, and a signal - expanding unit. The voltage - limiting unit and the signal - expanding unit are connected in parallel to the H - bridge discharge module, and the detection unit is connected to the signal - expanding unit.

[0009] Furthermore, the voltage limiting unit includes a diode D17 and a diode D19, which are connected in series, and an end of the diode D17 away from the diode D19 is connected to the H-bridge discharge module, and an end of the diode D19 away from the diode D17 is grounded.

[0010] Furthermore, the signal expansion unit includes a resistor R136 and a resistor R139, which are connected in series, and an end of the resistor R136 away from the resistor R139 is connected to the H-bridge discharge module, and an end of the resistor R139 away from the resistor R136 is grounded.

[0011] Furthermore, the detection unit includes a transistor Q30 , a first electrode of the transistor Q30 is connected to a common end of the resistor R136 and the resistor R139 , a second electrode outputs an IO_CHn_EXIT signal, and a third electrode is grounded.

[0012] Furthermore, the H-bridge discharge module includes a transistor Q13, a transistor Q15, a transistor Q23, and a transistor Q24. A first load access point CHn+ is provided between the transistor Q13 and the transistor Q23, and a second first load access point CHn- is provided between the transistor Q15 and the transistor Q24, forming an H-shaped discharge structure. The transistor Q23, the transistor Q24, the diode D17, and the resistor R136 are interconnected to form a common end.

[0013] Furthermore, the electric pulse therapy lead detachment detection circuit also includes a control module, which includes a first control unit, a second control unit, a third control unit, and a fourth control unit. The first control unit is connected to the transistor Q13, the second control unit is connected to the transistor Q15, the third control unit is connected to the transistor Q23, and the fourth control unit is connected to the transistor Q24.

[0014] Furthermore, the first control unit includes a resistor R110, a resistor R113, a resistor R118, and a transistor Q19, one end of the resistor R110 is connected to the transistor Q13, and the other end is connected to the transistor Q19, the resistor R113 and the resistor R118 form a common end connected to the transistor Q19, and the end of the resistor R113 away from the transistor Q19 is connected to the control signal, and the end of the resistor R118 away from the transistor Q19 is grounded.

[0015] Furthermore, the second control unit includes a resistor R109, a resistor R112, a resistor R117, and a transistor Q17, one end of the resistor R109 is connected to the transistor Q15, and the other end is connected to the transistor Q17, the resistor R112 and the resistor R117 form a common end connected to the transistor Q17, and the end of the resistor R112 away from the transistor Q17 is connected to the control signal, and the end of the resistor R117 away from the transistor Q17 is grounded.

[0016] Furthermore, the third control unit includes a resistor R123, a resistor R129, a resistor R133, and a transistor Q27, one end of the resistor R123 is connected to the transistor Q23, and the other end is connected to the transistor Q27, the resistor R129 and the resistor R133 form a common end connected to the transistor Q27, and the end of the resistor R129 away from the transistor Q27 is connected to the control signal, and the end of the resistor R133 away from the transistor Q27 is grounded.

[0017] Furthermore, the fourth control unit includes a resistor R124, a resistor R131, a resistor R134, and a transistor Q28, one end of the resistor R124 is connected to the transistor Q24, and the other end is connected to the transistor Q28, the resistor R131 and the resistor R134 form a common end connected to the transistor Q28, and the end of the resistor R131 away from the transistor Q28 is connected to the control signal, and the end of the resistor R134 away from the transistor Q28 is grounded.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the lead-off detection module of the detection circuit is provided with a voltage limiting unit and a signal expansion unit. When the voltage of the electric pulse signal increases, the voltage limiting unit can perform voltage limiting, so that the voltage drop of the lead-off detection module itself is very small, thereby reducing the impact on the electric pulse output voltage; when the voltage of the electric pulse signal decreases, the voltage drop of the voltage limiting unit is very small and does not reach the detection threshold. At this time, the signal expansion unit can form a small signal path, which can expand the lead-off detection range and ensure that the detection unit can work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the electric pulse therapy lead-off detection circuit of this embodiment. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] To achieve the above purpose, the technical solution of the utility model is as follows:

[0022] See also Figure 1 As shown, this embodiment provides an electric pulse therapy lead-off detection circuit, including: an H-bridge discharge module, a lead-off detection module, the lead-off detection module includes a detection unit, a voltage limiting unit, and a signal expansion unit, the voltage limiting unit and the signal expansion unit are connected to the H-bridge discharge module, and the detection unit is connected to the signal expansion unit.

[0023] In the present application, the H-bridge discharge module outputs an electric pulse signal to act on the load. When the voltage of the electric pulse signal increases, the voltage limiting unit can perform voltage limiting, so that the voltage drop of the lead-off detection module itself is very small, thereby reducing the impact on the electric pulse output voltage; when the voltage of the electric pulse signal decreases, the voltage drop of the voltage limiting unit is very small and does not reach the detection threshold. At this time, the signal expansion unit can form a small signal path, which can expand the lead-off detection range and ensure that the detection unit can work normally.

[0024] Furthermore, the voltage limiting unit includes a diode D17 and a diode D19, which are connected in series. An end of the diode D17 away from the diode D19 is connected to the H-bridge discharge module, and an end of the diode D19 away from the diode D17 is grounded.

[0025] Furthermore, the signal expansion unit includes a resistor R136 and a resistor R139, which are connected in series. An end of the resistor R136 away from the resistor R139 is connected to the H-bridge discharge module, and an end of the resistor R139 away from the resistor R136 is grounded.

[0026] Furthermore, the detection unit includes a transistor Q30 , a first electrode of the transistor Q30 is connected to the common end of the resistor R136 and the resistor R139 , a second electrode outputs the IO_CHn_EXIT signal, and a third electrode is grounded.

[0027] In this application, theoretically, when a load is connected, transistor Q30 is turned on and IO_CHn_EXIT outputs a low level. When no load is connected, Q30 is turned off and IO_CHn_EXIT outputs a high level. When the voltage of the electrical pulse signal increases, since the voltage drop of the diode is very small, theoretically less than 1.4V, diodes D17 and D19 can form a voltage limiter when connected in series, which has little effect on the electrical pulse output voltage. When the electrical pulse output voltage of the H-bridge discharge module decreases, the voltage drop of diodes D17 and D19 in series is very small and does not reach the detection threshold. At this time, resistors R136 and R139 form a small signal path, which can expand the lead-off detection range and ensure that the detection unit can operate normally.

[0028] Furthermore, the H-bridge discharge module includes transistors Q13, Q15, Q23, and Q24. A first load access point CHn+ is provided between the transistors Q13 and Q23, and a second first load access point CHn- is provided between the transistors Q15 and Q24, forming an H-shaped discharge structure. The transistors Q23, Q24, the diode D17, and the resistor R136 are interconnected to form a common end.

[0029] Furthermore, the electric pulse therapy lead detachment detection circuit also includes a control module, which includes a first control unit, a second control unit, a third control unit, and a fourth control unit. The first control unit is connected to the transistor Q13, the second control unit is connected to the transistor Q15, the third control unit is connected to the transistor Q23, and the fourth control unit is connected to the transistor Q24.

[0030] Furthermore, the first control unit includes a resistor R110, a resistor R113, a resistor R118, and a transistor Q19. One end of the resistor R110 is connected to the transistor Q13, and the other end is connected to the transistor Q19. The resistor R113 and the resistor R118 form a common end connected to the transistor Q19, and the end of the resistor R113 away from the transistor Q19 is connected to the control signal, and the end of the resistor R118 away from the transistor Q19 is grounded.

[0031] Furthermore, the second control unit includes a resistor R109, a resistor R112, a resistor R117, and a transistor Q17. One end of the resistor R109 is connected to the transistor Q15, and the other end is connected to the transistor Q17. The resistor R112 and the resistor R117 form a common end connected to the transistor Q17, and the end of the resistor R112 away from the transistor Q17 is connected to the control signal, and the end of the resistor R117 away from the transistor Q17 is grounded.

[0032] Furthermore, the third control unit includes a resistor R123, a resistor R129, a resistor R133, and a transistor Q27. One end of the resistor R123 is connected to the transistor Q23, and the other end is connected to the transistor Q27. The resistor R129 and the resistor R133 form a common end connected to the transistor Q27, and the end of the resistor R129 away from the transistor Q27 is connected to the control signal, and the end of the resistor R133 away from the transistor Q27 is grounded.

[0033] Furthermore, the fourth control unit includes a resistor R124, a resistor R131, a resistor R134, and a transistor Q28. One end of the resistor R124 is connected to the transistor Q24, and the other end is connected to the transistor Q28. The resistors R131 and R134 form a common end connected to the transistor Q28, and the end of the resistor R131 away from the transistor Q28 is connected to the control signal, and the end of the resistor R134 away from the transistor Q28 is grounded.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric pulse therapy lead-off detection circuit, characterized in that: include: An H-bridge discharge module and a lead-off detection module are provided. The lead-off detection module includes a detection unit, a voltage limiting unit, and a signal expansion unit. The voltage limiting unit and the signal expansion unit are connected to the H-bridge discharge module. The detection unit is connected to the signal expansion unit.

2. The electric pulse therapy lead-off detection circuit according to claim 1, characterized in that: The voltage limiting unit includes a diode D17 and a diode D19, which are connected in series. One end of the diode D17 away from the diode D19 is connected to the H-bridge discharge module, and one end of the diode D19 away from the diode D17 is grounded.

3. The electric pulse therapy lead-off detection circuit according to claim 2, characterized in that: The signal expansion unit includes a resistor R136 and a resistor R139, which are connected in series. An end of the resistor R136 away from the resistor R139 is connected to the H-bridge discharge module, and an end of the resistor R139 away from the resistor R136 is grounded.

4. The electric pulse therapy lead-off detection circuit according to claim 3, characterized in that: The detection unit includes a transistor Q30 , a first electrode of the transistor Q30 is connected to the common end of the resistor R136 and the resistor R139 , a second electrode outputs an IO_CHn_EXIT signal, and a third electrode is grounded.

5. The electric pulse therapy lead-off detection circuit according to claim 3, characterized in that: The H-bridge discharge module includes a transistor Q13, a transistor Q15, a transistor Q23, and a transistor Q24. A first load access point CHn+ is provided between the transistor Q13 and the transistor Q23, and a second first load access point CHn- is provided between the transistor Q15 and the transistor Q24, forming an H-shaped discharge structure. The transistor Q23, the transistor Q24, the diode D17, and the resistor R136 are interconnected to form a common end.

6. The electric pulse therapy lead-off detection circuit according to claim 5, characterized in that: The electric pulse therapy lead-off detection circuit also includes a control module, which includes a first control unit, a second control unit, a third control unit, and a fourth control unit. The first control unit is connected to the transistor Q13, the second control unit is connected to the transistor Q15, the third control unit is connected to the transistor Q23, and the fourth control unit is connected to the transistor Q24.

7. The electric pulse therapy lead-off detection circuit according to claim 6, characterized in that: The first control unit includes a resistor R110, a resistor R113, a resistor R118, and a transistor Q19. One end of the resistor R110 is connected to the transistor Q13, and the other end is connected to the transistor Q19. The resistor R113 and the resistor R118 form a common end connected to the transistor Q19, and the end of the resistor R113 away from the transistor Q19 is connected to the control signal, and the end of the resistor R118 away from the transistor Q19 is grounded.

8. The electric pulse therapy lead-off detection circuit according to claim 6, characterized in that: The second control unit includes a resistor R109, a resistor R112, a resistor R117, and a transistor Q17. One end of the resistor R109 is connected to the transistor Q15, and the other end is connected to the transistor Q17. The resistors R112 and R117 form a common end connected to the transistor Q17, and the end of the resistor R112 away from the transistor Q17 is connected to the control signal, and the end of the resistor R117 away from the transistor Q17 is grounded.

9. The electric pulse therapy lead-off detection circuit according to claim 6, characterized in that: The third control unit includes a resistor R123, a resistor R129, a resistor R133, and a transistor Q27. One end of the resistor R123 is connected to the transistor Q23, and the other end is connected to the transistor Q27. The resistor R129 and the resistor R133 form a common end connected to the transistor Q27, and the end of the resistor R129 away from the transistor Q27 is connected to the control signal, and the end of the resistor R133 away from the transistor Q27 is grounded.

10. The electric pulse therapy lead-off detection circuit according to claim 6, characterized in that: The fourth control unit includes a resistor R124, a resistor R131, a resistor R134, and a transistor Q28. One end of the resistor R124 is connected to the transistor Q24, and the other end is connected to the transistor Q28. The resistors R131 and R134 form a common end connected to the transistor Q28, and the end of the resistor R131 away from the transistor Q28 is connected to the control signal, and the end of the resistor R134 away from the transistor Q28 is grounded.

Images