Control circuit for channel self-inspection of pulse therapeutic apparatus

Abstract

The utility model relates to the technical field of pulse therapeutic instruments, in particular to a channel self-checking control circuit of a pulse therapeutic instrument, which comprises a master control MCU (Microprogrammed Control Unit), a self-checking switching channel, an impedance sampling channel and an MCU recovery channel. The master control MCU unit is connected with the latch module U10 and the isolation operational amplifier module, the latch module U10 is connected to an interface CN1 of the self-checking circuit board through an interface J16, the interface CN1 of the self-checking circuit board is connected with the self-checking switching channel, the self-checking switching channel is connected with the impedance sampling channel, the impedance sampling channel is connected with the isolation operational amplifier module, and the isolation operational amplifier module is connected with the self-checking switching channel. And the MCU recovery channel is an AD differential input port from an impedance sampling channel to the main control MCU directly. According to the utility model, through switching of the self-checking channels and detection of sample resistance values in the self-checking channels, whether equipment hardware is damaged can be automatically detected, channel problems can be rapidly positioned, and maintenance personnel can conveniently and rapidly check and maintain, so that the use efficiency of the equipment is improved, and the continuity of department treatment work is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse therapeutic instruments, specifically to a control circuit for channel self-checking of a pulse therapeutic instrument. Background Art

[0002] The medium and low frequency pulse magnetic resonance and magnetoelectric therapeutic instrument is a new type of therapeutic device. This therapeutic instrument is specifically used for the treatment of male diseases and has unique curative effects compared with traditional medium and low frequency therapeutic instruments.

[0003] In the prior art, after the channel of the medium and low frequency pulse magnetic resonance and magnetoelectric therapeutic instrument is damaged, it is difficult to quickly locate and troubleshoot the problem. Professional technicians need to come to the door for maintenance or the device needs to be sent back to the manufacturer for maintenance, which takes a relatively long time and has high human and material costs. Moreover, during this period, the device cannot be used, causing inconvenience to the treatment in the department and affecting the normal operation and income of the department. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a control circuit for channel self-checking of a pulse therapeutic instrument, so as to solve the problem in the above background art that it is difficult to quickly locate and troubleshoot the problem after the channel of the existing therapeutic instrument is damaged.

[0005] To achieve the above purpose, the utility model provides a control circuit for channel self-checking of a pulse therapeutic instrument, which includes a main control MCU unit, a self-checking switching channel, an impedance sampling channel, and an MCU feedback sampling channel. The main control MCU unit is connected to a latch module U10 and an isolation operational amplifier module. The latch module U10 is connected to the interface CN1 of the self-checking circuit board through an interface J16. The interface CN1 of the self-checking circuit board is connected to the self-checking switching channel. The self-checking switching channel is connected to the impedance sampling channel. The impedance sampling channel is connected to the isolation operational amplifier module. The MCU feedback sampling channel is that the impedance sampling channel directly enters the AD differential input port of the main control MCU unit, where:

[0006] The impedance sampling channel is provided with six paths and has the same structure. The impedance sampling channel includes a boost power supply unit, an output loop unit, and a signal processing unit. The boost power supply unit is connected to the power supply and the output loop unit. The output loop unit is connected to the signal processing unit and the self-checking switching channel. The self-checking switching channel is also provided with six paths and has the same structure. The impedance sampling channel corresponds to the self-checking switching channel one by one. The signal processing unit is connected to the isolation operational amplifier module.

[0007] As a further improvement of the present technical solution, an inductor L7 is provided in the boost power supply unit. The inductor L7 is connected to a 5V power supply. The other end of the inductor L7 is connected to the anode of a conducting diode D4 and the collector of a switching triode Q18. The emitter of the switching triode Q18 is connected to the analog ground. The cathode of the conducting diode D4 is connected to the positive electrode of a capacitor C36 and the output loop unit. The negative electrode of the capacitor C36 is connected to the analog ground.

[0008] As a further improvement of the present technical solution, the cathode of the conducting diode D4 is connected to the emitters of a switching triode Q12 and a switching triode Q14. The collector of the switching triode Q12 is connected to the contact 7 of a relay T1. The contact 2 of the relay T1 is connected to the emitter of a switching triode Q11. The collector of the switching triode Q11 is connected to a resistor R51. The collector of the switching triode Q14 is connected to the contact 2 of the relay T1. The contact 7 of the relay T1 is connected to the emitter of a switching triode Q13. The collector of the switching triode Q13 is connected to the resistor R51. The other end of the resistor R51 is connected to the anode of a conducting diode D2. The cathode of the conducting diode D2 is connected to the analog ground.

[0009] As a further improvement of the present technical solution, the resistor R51 is connected in parallel with a signal processing unit. The resistor R51 is connected to a resistor R200. The other end of the resistor R200 is connected to a capacitor C42, a capacitor C155, and the VINP pin of an isolation operational amplifier U23. The other end of the capacitor C42 is connected to the analog ground. The other end of the resistor R51 is connected to a resistor R46. The other end of the resistor R46 is connected to a capacitor C43, a capacitor C155, and the VIINN pin of the isolation operational amplifier U23. The other end of the capacitor C43 is connected to the analog ground.

[0010] As a further improvement of the present technical solution, the contact 1 of the relay T1 is connected to a resistor FB1 and the cathode of a conducting diode D1. The other end of the resistor FB1 is connected to a 12V power supply. The contact 8 of the relay T1 is connected to the anode of the conducting diode D1 and the collector of a switching triode Q1. The emitter of the switching triode Q1 is grounded. The base of the switching triode Q1 is connected to a resistor R1 and a resistor R2. The other end of the resistor R2 is connected to a capacitor C2. The other ends of the capacitor C2 and the resistor R1 are connected to the interface CN1 of the self-check circuit board. The contacts 4 and 5 of the relay T1 are respectively connected to both ends of a resistor R13.

[0011] As a further improvement of the present technical solution, the VOUTP pin of the isolation operational amplifier U23 is connected to a resistor R201. The other end of the resistor R201 is connected to a capacitor C48 and the differential AD port of the main control MCU unit. The VOUTN pin of the isolation operational amplifier U23 is connected to a resistor R202. The other end of the resistor R202 is connected to a capacitor C49 and the differential AD port of the main control MCU unit.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In the control circuit for channel self-check of the pulse therapeutic apparatus, the main control MCU gives the output intensity, and the self-check switching channel control relay is used to switch between the human body treatment output loop and the standard impedance, so as to realize the individual test of each output channel. The pressure difference generated by the sampling resistor is amplified by the isolation operational amplifier and then collected and analyzed by the MCU. Once damage is detected, the user or maintenance personnel can simply handle the problem according to the prompt information, such as replacing the damaged component, so that the device can resume normal operation without waiting for the arrival of professional maintenance personnel. This greatly shortens the maintenance time and reduces the losses caused by equipment downtime.

[0014] 2. In the control circuit for channel self-check of the pulse therapeutic apparatus, the conduction current of each output channel generates a pressure difference through the sampling resistor. This pressure difference signal is amplified and filtered and then enters the differential ADC of the MCU for sampling. Whether the output channel is normal is judged according to the comparison result between the sampling value and the preset threshold. The maintenance personnel can accurately locate the faulty channel and quickly troubleshoot the problem, which not only saves the diagnosis time but also simplifies the maintenance process, ensuring that the device can resume normal use as soon as possible. This is crucial for ensuring the efficient use of the device, especially in a medical environment where the availability of the device directly affects the treatment plan of patients and the work efficiency of the department. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of the present utility model;

[0016] Figure 2 is the latch module and module interface circuit diagram of the present utility model;

[0017] Figure 3 is the impedance sampling channel circuit diagram of the present utility model;

[0018] Figure 4 is the isolation operational amplifier module circuit diagram of the present utility model;

[0019] Figure 5 is the self-check circuit board interface circuit diagram of the present utility model;

[0020] Figure 6 is the self-check switching channel circuit diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0023] Please refer to Figures 1-6 As shown, this embodiment provides a control circuit for channel self-check of a pulse therapeutic apparatus, including a main control MCU unit, a self-check switching channel, an impedance sampling channel, and an MCU feedback sampling channel. The main control MCU unit is connected to a latch module U10 and an isolation operational amplifier module. The latch module U10 is connected to the interface CN1 of the self-check circuit board through the interface J16. The interface CN1 of the self-check circuit board is connected to the self-check switching channel. The self-check switching channel is connected to the impedance sampling channel. The impedance sampling channel is connected to the isolation operational amplifier module. The MCU feedback sampling channel is that the impedance sampling channel directly enters the AD differential input port of the main control MCU unit. Among them:

[0024] The impedance sampling channel is provided with six paths and the structures are all the same. The impedance sampling channel includes a boost power supply unit, an output loop unit, and a signal processing unit. The boost power supply unit is connected to the power supply and the output loop unit. The output loop unit is connected to the signal processing unit and the self-check switching channel. The self-check switching channel is also provided with six paths and the structures are all the same. The impedance sampling channel corresponds to the self-check switching channel one by one. The signal processing unit is connected to the isolation operational amplifier module.

[0025] The main control MCU unit uses the STM32H723ZET of ST Company as the control center of the entire system, which is responsible for coordinating the work of each module. It can control the entire self-check process by setting the output intensity, and collect and analyze data to judge the status of the channel. Its ports are mainly connected to the latch module U10 of the model 74HC573D and the isolation operational amplifier module. The main function of connecting the latch is to control the relay of the next-level self-check switch to increase the driving ability; connecting the isolation operational amplifier is to collect the current signal before the isolation operational amplifier, and after amplifying it by 8.1 times by itself, to the differential AD input port of the main control MCU unit U1 for sampling the current value.

[0026] The self-check switching channel outputs 6 control signals through the latch module U10, which respectively control 6 electrical pulse output channels. Each channel drives a relay to switch through a switching triode. In the self-check mode, the relay switches the output from the human body treatment circuit to the standard impedance load of 1kΩ, and the normal operation of the output channel can be tested.

[0027] There are six impedance sampling channels with the same structure. The impedance sampling channel includes a boost power supply unit, an output loop unit, and a signal processing unit. The boost power supply unit adjusts the output of a fixed duty cycle to output a fixed power supply voltage. The output loop unit forms a known current path to measure the performance of the output channel. The signal processing unit is provided with a low-pass filter composed of a pair of resistors and capacitors. The signal enters the isolation operational amplifier U23 after being processed by the low-pass filter.

[0028] The feedback interface of the MCU is that the impedance sampling channel directly enters the AD differential input port of the MCU. This port is a 12-bit ADC analog-to-digital converter built into the MCU, which can accurately convert the differential voltage signal. The AD value of the differential signal is compared with the self-set threshold range through the program for judgment. If it is within the threshold, it means that the channel is okay. If it is outside the threshold, an error prompt for this port can be given, indicating that there is a problem with the output circuit of the channel, usually the switching triode or the boost power supply of the output channel is damaged and needs to be disassembled for repair.

[0029] The boost power supply unit is provided with an inductor L7. One end of the inductor L7 is connected to the 5V power supply, and the other end is connected to the anode of the conducting diode D4 and the collector of the switching triode Q18. The emitter of the switching triode Q18 is connected to the analog ground. The cathode of the conducting diode D4 is connected to the positive electrode of the capacitor C36 and the output loop unit, and the negative electrode of the capacitor C36 is connected to the analog ground. The boost power supply part is composed of the inductor L7, the conducting diode D4, the switching triode Q18, and the capacitor C36. The output voltage can be adjusted by the switching duty cycle of the switching triode Q18, and a fixed power supply voltage is output by adjusting the fixed duty cycle.

[0030] The cathode of the conducting diode D4 is connected to the emitters of the switching triodes Q12 and Q14. The collector of the switching triode Q12 is connected to the contact 7 of the relay T1. The contact 2 of the relay T1 is connected to the emitter of the switching triode Q11. The collector of the switching triode Q11 is connected to the resistor R51. The collector of the switching triode Q14 is connected to the contact 2 of the relay T1. The contact 7 of the relay T1 is connected to the emitter of the switching triode Q13. The collector of the switching triode Q13 is connected to the resistor R51. The other end of the resistor R51 is connected to the anode of the conducting diode D2. The cathode of the conducting diode D2 is connected to the analog ground. The switching triodes Q11, Q12, Q13, Q14, the resistor R51, and the conducting diode D2 form an output loop. The power supply voltage forms a conducting current after passing through 4 switching triodes and a load standard impedance of 1 kΩ resistor, and then flows through R51 and D2 to form a conducting loop.

[0031] The resistor R51 is connected in parallel with the signal processing unit. The resistor R51 is connected to the resistor R200. The other end of the resistor R200 is connected to the capacitor C42, the capacitor C155, and the pin VINP of the isolation operational amplifier U23. The other end of the capacitor C42 is connected to the analog ground. The other end of the resistor R51 is connected to the resistor R46. The other end of the resistor R46 is connected to the capacitor C43, the capacitor C155, and the pin VIINN of the isolation operational amplifier U23. The other end of the capacitor C43 is connected to the analog ground. The resistor R51 is a sampling resistor. After passing through a low-pass filter composed of a pair of resistor-capacitor (resistor R200, resistor R46, capacitor C42, capacitor C43), its two ends enter the isolation operational amplifier U23 of the model CA-IS1300G25G. The output is amplified by a fixed factor of 8.1, and the output is still a pair of differential signals. After passing through another pair of resistor-capacitor low-pass filters (resistor R201, resistor R202, capacitor C48, capacitor C49), it is output to the MCU differential AD port.

[0032] The contact 1 of the relay T1 is connected to the resistor FB1 and the cathode of the conducting diode D1. The other end of the resistor FB1 is connected to the 12V power supply. The contact 8 of the relay T1 is connected to the anode of the conducting diode D1 and the collector of the switching triode Q1. The emitter of the switching triode Q1 is grounded. The base of the switching triode Q1 is connected to the resistors R1 and R2. The other end of the resistor R2 is connected to the capacitor C2. The other end of the capacitor C2 and the other end of the resistor R1 are connected to the interface CN1 of the self-check circuit board. The contacts 4 and 5 of the relay T1 are respectively connected to both ends of the resistor R13. The resistor R1 controls the base of the switching triode Q1 to drive the relay T1 to perform the position switching action. The normally closed points of the relay T1 itself are that the contacts 2 and 7 are conducting with each other, forming a human body treatment output loop. After the triode Q1 is turned on, the relay T1 is driven to act, and the contacts 4 and 5 are conducting, forming a loop with the fixed 1 kΩ standard impedance R13. To judge whether the output channel is normal or not, the principles of the other channels are the same.

[0033] The VOUTP pin of the isolated operational amplifier U23 is connected to the resistor R201, and the other end of the resistor R201 is connected to the capacitor C48 and the differential AD port of the main control MCU unit. The VOUTN pin of the isolated operational amplifier U23 is connected to the resistor R202, and the other end of the resistor R202 is connected to the capacitor C49 and the differential AD port of the main control MCU unit. The collected signal forms an RC low-pass filter through the resistors R201 and R202 and the capacitors C48 and C49, which is used to filter out high-frequency noise, ensure that the signal sent to the MCU is purer, and improve the accuracy of sampling.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. The control circuit of the channel self-check of the pulse therapeutic apparatus is characterized by: It includes a main control MCU unit, a self-test switching channel, an impedance sampling channel and an MCU recollection channel. The main control MCU unit is connected to a latch module U10 and an isolation amplifier module. The latch module U10 is connected to the interface CN1 of the self-test circuit board through the interface J16. The interface CN1 of the self-test circuit board is connected to the self-test switching channel. The self-test switching channel is connected to the impedance sampling channel. The impedance sampling channel is connected to the isolation amplifier module. The MCU recollection channel is an impedance sampling channel that directly enters the AD differential input port of the main control MCU unit, wherein: The impedance sampling channels are provided with six paths and the structures are all the same. The impedance sampling channels include a boost power supply unit, an output circuit unit and a signal processing unit. The boost power supply unit is connected to the power supply and the output circuit unit, and the output circuit unit is connected to the signal processing unit and the self-test switching channel. The self-test switching channels are also provided with six paths and the structures are all the same. The impedance sampling channels correspond to the self-test switching channels one by one, and the signal processing unit is connected to the isolation operational amplifier module.

2. The control circuit for channel self-checking of the pulse therapeutic apparatus according to claim 1, characterized in that: The boost power supply unit is provided with an inductor L7, which is connected to a 5V power supply. The other end of the inductor L7 is connected to the anode of a conducting diode D4 and the collector of a switching transistor Q18. The emitter of the switching transistor Q18 is connected to an analog ground. The cathode of the conducting diode D4 is connected to the positive electrode of a capacitor C36 and an output loop unit. The negative electrode of the capacitor C36 is connected to an analog ground.

3. The control circuit for channel self-checking of the pulse therapeutic apparatus according to claim 2, characterized in that: The cathode of the conducting diode D4 is connected to the emitter of the switching transistor Q12 and the emitter of the switching transistor Q14, the collector of the switching transistor Q12 is connected to the contact 7 of the relay T1, the contact 2 of the relay T1 is connected to the emitter of the switching transistor Q11, the collector of the switching transistor Q11 is connected to the resistor R51, the collector of the switching transistor Q14 is connected to the contact 2 of the relay T1, the contact 7 of the relay T1 is connected to the emitter of the switching transistor Q13, the collector of the switching transistor Q13 is connected to the resistor R51, the other end of the resistor R51 is connected to the anode of the conducting diode D2, and the cathode of the conducting diode D2 is connected to the analog ground.

4. The control circuit for channel self-checking of the pulse therapeutic apparatus according to claim 3, characterized in that: The resistor R51 is connected in parallel to the signal processing unit, the resistor R51 is connected to the resistor R200, the other end of the resistor R200 is connected to the capacitor C42, the capacitor C155 and the pin VINP of the isolation amplifier U23, the other end of the capacitor C42 is connected to the analog ground, the other end of the resistor R51 is connected to the resistor R46, the other end of the resistor R46 is connected to the capacitor C43, the capacitor C155 and the pin VIINN of the isolation amplifier U23, and the other end of the capacitor C43 is connected to the analog ground.

5. The control circuit for channel self-checking of the pulse therapeutic apparatus according to claim 3, characterized in that: The contact 1 of the relay T1 is connected to the resistor FB1 and the cathode of the conducting diode D1, the other end of the resistor FB1 is connected to a 12V power supply, the contact 8 of the relay T1 is connected to the anode of the conducting diode D1 and the collector of the switching transistor Q1, the emitter of the switching transistor Q1 is grounded, the base of the switching transistor Q1 is connected to the resistor R1 and the resistor R2, the other end of the resistor R2 is connected to the capacitor C2, the other ends of the capacitor C2 and the other end of the resistor R1 are connected to the interface CN1 of the self-test circuit board, and the relay T1 contact 4 and the relay T1 contact 5 are respectively connected to the two ends of the resistor R13.

6. The control circuit for channel self-checking of the pulse therapeutic apparatus according to claim 4, characterized in that: The isolation amplifier U23 pin VOUTP is connected to resistor R201, the other end of the resistor R201 is connected to capacitor C48 and the differential AD port of the main control MCU unit, the isolation amplifier U23 pin VOUTN is connected to resistor R202, the other end of the resistor R202 is connected to capacitor C49 and the differential AD port of the main control MCU unit.

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