Radio frequency thermocoagulation contact switching device

Abstract

This invention relates to the technical field of medical devices, and more particularly to a radiofrequency thermocoagulation contact switching device. The radiofrequency thermocoagulation contact switching device includes a central processing unit (CPU), a touch-enabled liquid crystal display circuit, a signal acquisition circuit, a signal expansion circuit, and a signal switching circuit. The touch-enabled liquid crystal display circuit is connected to the CPU, the signal acquisition circuit is connected to the CPU, the signal expansion circuit is connected to the CPU, and the signal switching circuit is connected to the signal expansion circuit. This device not only enables conventional treatment methods such as monopolar thermocoagulation and bipolar thermocoagulation, but also allows for simultaneous selection of multiple electrode contacts for multi-point synchronous thermocoagulation, reducing operational difficulty while expanding treatment options.

Description

Technical Field

[0001] This invention relates to a contact switching circuit, and more particularly to a radio frequency thermal condensation contact switching device. Background Technology

[0002] Currently, most mainstream radiofrequency thermocoagulation devices on the market can only output one set of radiofrequency signals at a time. In deep brain thermocoagulation, the conventional approach is to use a dedicated radiofrequency thermocoagulation needle with only one set of contacts, or to bring out multi-contact deep brain electrodes through a special interface. The doctor manually selects the contact to be thermocoagulated and connects it to the radiofrequency thermocoagulation device for monopolar thermocoagulation. When other contacts need to be thermocoagulated, the doctor needs to repeat the previous steps to select the contacts. This method is cumbersome and its application is limited in clinical practice. Summary of the Invention

[0003] The present invention aims to solve the above-mentioned defects and provide a radio frequency thermocoagulation contact switching device.

[0004] To overcome the deficiencies in the prior art, the technical solution adopted by the present invention to solve its technical problem is as follows: This radio frequency thermal coagulation contact switching device includes a central processing unit U1, a touch chip U2, an LCD liquid crystal display interface M1, a signal expansion circuit, and a signal acquisition circuit. The touch chip U2, capacitor C1, resistor R5, and LCD liquid crystal display interface M1 form a liquid crystal display circuit with touch function. The signal expansion circuit is composed of shift registers, and at least one set is provided. The signal acquisition circuit is composed of resistors R1, R2, R3, and R4. An electromagnetic relay is connected to the signal expansion circuit. The liquid crystal display circuit, the signal expansion circuit, and the signal acquisition circuit are connected to the central processing unit U1.

[0005] According to another embodiment of the present invention, the LCD liquid crystal display interface M1 of the liquid crystal display circuit further includes an XL terminal connected to the Y- terminal of the touch chip U2, a YD terminal connected to the X- terminal of the touch chip U2, an XR terminal connected to the Y+ terminal of the touch chip U2, and a YU terminal connected to the X+ terminal of the touch chip U2. The GND terminal, ADD0 terminal, and ADD1 terminal of the touch chip U2 are connected to one end of the capacitor C1 and grounded. The other end of the capacitor C1 is connected to the VCC terminal of the touch chip U2, one end of the resistor R5, and one end of the resistor R6. The other end of the resistor R5 is connected to the SCL terminal of the touch chip U2, and the other end of the resistor R6 is connected to the SDA terminal of the touch chip U2.

[0006] According to another embodiment of the present invention, the signal expansion circuit further includes a shift register U3 and a driver chip U5 as a group. The Q1 terminal of the shift register U3 is connected to the IN1 terminal of the driver chip U5, the Q2 terminal of the shift register U3 is connected to the IN2 terminal of the driver chip U5, the Q3 terminal of the shift register U3 is connected to the IN3 terminal of the driver chip U5, the Q4 terminal of the shift register U3 is connected to the IN4 terminal of the driver chip U5, the Q5 terminal of the shift register U3 is connected to the IN5 terminal of the driver chip U5, the Q6 terminal of the shift register U3 is connected to the IN6 terminal of the driver chip U5, the Q7 terminal of the shift register U3 is connected to the IN7 terminal of the driver chip U5, the GND terminal of the shift register U3 is connected to the GND terminal of the driver chip U5, the / MR terminal of the shift register U3 is connected to the VCC terminal of the shift register U3 and connected to one end of the capacitor C2, and the other end of the capacitor C2 is connected to GND. Shift register U4 and driver chip U6 form another group. The Q1 terminal of shift register U4 is connected to the IN1 terminal of driver chip U6, the Q2 terminal of shift register U4 is connected to the IN2 terminal of driver chip U6, the Q3 terminal of shift register U4 is connected to the IN3 terminal of driver chip U6, the Q4 terminal of shift register U4 is connected to the IN4 terminal of driver chip U6, the Q5 terminal of shift register U4 is connected to the IN5 terminal of driver chip U6, the Q6 terminal of shift register U4 is connected to the IN6 terminal of driver chip U6, the Q7 terminal of shift register U4 is connected to the IN7 terminal of driver chip U6, the GND terminal of shift register U4 is connected to the GND terminal of driver chip U6, the / MR terminal of shift register U4 is connected to the VCC terminal of driver chip U6 and connected to one end of capacitor C3, and the other end of capacitor C3 is connected to GND; the Q7S terminal of shift register U3 is connected to the DS terminal of shift register U4.

[0007] According to another embodiment of the present invention, the central processing unit U1 further includes its DB7, DB6, DB5, DB4, DB3, DB2, DB1, DB0, RD, WR, RS, and CS terminals sequentially connected to the LCD liquid crystal display interface M1's DB7, DB6, DB5, DB4, DB3, DB2, DB1, DB0, RD, WR, RS, and CS terminals; the central processing unit U1's DATA terminal connected to the shift register U3's DS terminal; the central processing unit U1's RCLK terminal connected to the shift register U3's STCP terminal and the shift register U4's STCP terminal; and the central processing unit U1's SCLK terminal connected to the shift register U3's SHCP terminal and the shift register U4's STCP terminal. The SHCP terminal of register U4 and the INT0 terminal of CPU U1 are connected to the PQ / INT terminal of touch chip U2. The SCL terminal of CPU U1 is connected to the SCL terminal of touch chip U2. The SDA terminal of CPU U1 is connected to the SDA terminal of touch chip U2. The CH0+ terminal of CPU U1 is connected to one end of resistor R1, and the other end of resistor R1 is VCC. The CH0- terminal of CPU U1 is connected to one end of resistor R2, and the other end of resistor R2 is GND. The CH1+ terminal of CPU U1 is connected to one end of resistor R3, and the other end of resistor R3 is VCC. The CH1- terminal of CPU U1 is connected to one end of resistor R4, and the other end of resistor R4 is GND.

[0008] According to another embodiment of the present invention, the electromagnetic relay further includes relays K1-K10.

[0009] According to another embodiment of the present invention, relays K1 and K2 are further included as components of a signal switching circuit; the RTF EC- and RTF EC+ terminals on relay K1 are correspondingly connected to the RTF EC- and RTF EC+ terminals for connecting the radio frequency thermocoagulation equipment interface P1, and the ADC EC- and ADC EC+ terminals on relay K1 are correspondingly connected to the ADC EC- and ADC EC+ terminals of the signal acquisition circuit, respectively; the EC+ terminal on relay K1 is correspondingly connected to the EC+ terminals on K3, K5, K7, and K9 to form a circuit for switching electrode contacts; the RTF TC- and RTF TC+ terminals on relay K2 are correspondingly connected to the RTF TC- and RTF TC+ terminals for connecting the radio frequency thermocoagulation equipment interface P1, and the ADC TC- and ADC TC+ terminals on relay K2 are correspondingly connected to the ADC TC- and ADC EC+ terminals of the signal acquisition circuit. The TC+ terminal, the TC- terminal and the TC+ terminal on relay K2 are connected to the interface P2 for connecting electrodes. The EC1, EC2, EC3 and EC4 terminals on interface P2 are connected to the EC1 terminal on relay K4, the EC2 terminal on K6, the EC3 terminal on K8 and the EC4 terminal on K10 respectively, forming a radiofrequency therapy circuit.

[0010] The beneficial effects of this invention are as follows: This radiofrequency thermocoagulation contact switching device features a touch-enabled LCD display circuit, providing a human-computer interaction interface. Users can select different electrode models via the interface navigation. The central processing unit (CPU) identifies the selected electrode model and displays a schematic diagram of the corresponding contact layout on the LCD. Users can select any contact on the schematic diagram, and the CPU switches the radiofrequency signal output by the radiofrequency thermocoagulation device to the corresponding electrode contact based on the user's selection. With this device, users do not need to change the hardware connection between the radiofrequency thermocoagulation device and the brain electrodes to set the contact state to any of three contact types: positive contact, negative contact, or unrelated contact. This not only enables conventional treatment methods such as monopolar and bipolar thermocoagulation but also allows simultaneous selection of multiple electrode contacts for multi-point synchronous thermocoagulation, reducing operational difficulty and expanding treatment options. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] like Figure 1 As shown, the radio frequency thermal contact switching device includes a central processing unit, a touch-enabled liquid crystal display circuit, a signal acquisition circuit, a signal expansion circuit, and a signal switching circuit. The touch-enabled liquid crystal display circuit is connected to the central processing unit, the signal acquisition circuit is connected to the central processing unit, the signal expansion circuit is connected to the central processing unit, and the signal switching circuit is connected to the signal expansion circuit.

[0015] Specifically, the system includes a central processing unit (CPU) U1, a touch chip U2, an LCD display interface M1, a signal expansion circuit, and a signal acquisition circuit. The touch chip U2, capacitor C1, resistor R5, and LCD display interface M1 form a touch-enabled LCD circuit. The signal acquisition circuit consists of resistors R1, R2, R3, and R4. An electromagnetic relay is connected to the signal expansion circuit. The LCD circuit, signal expansion circuit, and signal acquisition circuit are connected to the CPU U1. M1 is an LCD display with an integrated touch sensor. The touch sensor signal is connected to U2, and the data bus is connected to the CPU U1. U2 is a touchscreen acquisition chip connected to the CPU U1 via an IIC bus.

[0016] The central processing unit U1 displays the electrode model and corresponding contact layout diagram to the user through M1. The user sets the contact status through the touch screen, and can set any selectable contact to positive, negative, or floating state. Multiple contacts can be selected at the same time. The central processing unit U1 obtains the electrode model and corresponding contact combination selected by the user through the touch screen acquisition chip, and transmits the encoded signal to the signal expansion module through the serial bus DATA, RCLK, and SCLK.

[0017] The signal expansion module consists of shift registers, and at least one set is provided.

[0018] Preferred example

[0019] The signal expansion circuit consists of U3, U4, U5, U6, C2, and C3. U3 and U4 are shift registers with latching functions, responsible for parsing the serial signals sent by the central processing unit U1. Each latch can expand eight output interfaces. U5 and U6 are driver chips used to enhance the driving capability of the output interfaces. Figure 1 As shown, only two signal expansion circuits are displayed. Based on the same principle, a sufficient number of output interfaces can be expanded.

[0020] The two signal expansion circuits are structured as follows: Each signal expansion circuit consists of a shift register U3 and a driver chip U5. The Q1 terminal of shift register U3 is connected to the IN1 terminal of driver chip U5; the Q2 terminal of shift register U3 is connected to the IN2 terminal of driver chip U5; the Q3 terminal of shift register U3 is connected to the IN3 terminal of driver chip U5; the Q4 terminal of shift register U3 is connected to the IN4 terminal of driver chip U5; the Q5 terminal of shift register U3 is connected to the IN5 terminal of driver chip U5; the Q6 terminal of shift register U3 is connected to the IN6 terminal of driver chip U5; the Q7 terminal of shift register U3 is connected to the IN7 terminal of driver chip U5; the GND terminal of shift register U3 is connected to the GND terminal of driver chip U5; the / MR terminal of shift register U3 is connected to the VCC terminal of shift register U3 and to one end of capacitor C2; the other end of capacitor C2 is connected to GND. Shift register U4 and driver chip U6 form another group. The Q1 terminal of shift register U4 is connected to the IN1 terminal of driver chip U6, the Q2 terminal of shift register U4 is connected to the IN2 terminal of driver chip U6, the Q3 terminal of shift register U4 is connected to the IN3 terminal of driver chip U6, the Q4 terminal of shift register U4 is connected to the IN4 terminal of driver chip U6, the Q5 terminal of shift register U4 is connected to the IN5 terminal of driver chip U6, the Q6 terminal of shift register U4 is connected to the IN6 terminal of driver chip U6, the Q7 terminal of shift register U4 is connected to the IN7 terminal of driver chip U6, the GND terminal of shift register U4 is connected to the GND terminal of driver chip U6, the / MR terminal of shift register U4 is connected to the VCC terminal of driver chip U6 and connected to one end of capacitor C3, and the other end of capacitor C3 is connected to GND; the Q7S terminal of shift register U3 is connected to the DS terminal of shift register U4.

[0021] Preferred example

[0022] The connection structure of the LCD display circuit with touch function is as follows: the XL terminal of the LCD display interface M1 of the LCD display circuit is connected to the Y- terminal of the touch chip U2, the YD terminal is connected to the X- terminal of the touch chip U2, the XR terminal is connected to the Y+ terminal of the touch chip U2, and the YU terminal is connected to the X+ terminal of the touch chip U2. The GND terminal, ADD0 terminal, and ADD1 terminal of the touch chip U2 are connected to one end of the capacitor C1 and grounded. The other end of the capacitor C1 is connected to the VCC terminal of the touch chip U2, one end of the resistor R5, and one end of the resistor R6. The other end of the resistor R5 is connected to the SCL terminal of the touch chip U2, and the other end of the resistor R6 is connected to the SDA terminal of the touch chip U2.

[0023] Preferred example

[0024] The specific connection structure between the central processing unit U1 and the touch-enabled LCD display circuit, signal acquisition circuit, signal expansion circuit, and signal switching circuit is as follows: The DB7, DB6, DB5, DB4, DB3, DB2, DB1, DB0, RD, WR, RS, and CS terminals of the central processing unit U1 are sequentially connected to the DB7, DB6, DB5, DB4, DB3, DB2, DB1, DB0, RD, WR, RS, and CS terminals of the LCD display interface M1. The DATA terminal of the central processing unit U1 is connected to the DS terminal of the shift register U3. The RCLK terminal of the central processing unit U1 is connected to the STCP terminal of the shift register U3 and the STCP terminal of the shift register U4. The SCLK terminal of the central processing unit U1 is connected to the shift register U4. The SHCP pin of register U3 and the SHCP pin of shift register U4 are connected to the INT0 pin of CPU U1 and the PQ / INT pin of touch chip U2. The SCL pin of CPU U1 and the SDA pin of CPU U1 are connected to the SDA pin of touch chip U2. The CH0+ pin of CPU U1 is connected to one end of resistor R1, and the other end of resistor R1 is the VCC pin. The CH0- pin of CPU U1 is connected to one end of resistor R2, and the other end of resistor R2 is the GND pin. The CH1+ pin of CPU U1 is connected to one end of resistor R3, and the other end of resistor R3 is the VCC pin. The CH1- pin of CPU U1 is connected to one end of resistor R4, and the other end of resistor R4 is the GND pin.

[0025] The electromagnetic relay includes relays K1-K10, and K1~K10 form a signal switching circuit.

[0026] The specific connection structure of the electromagnetic relay is as follows:

[0027] Relays K1 and K2 are components of the signal switching circuit;

[0028] The RTF EC- and RTF EC+ terminals on relay K1 are connected to the RTF EC- and RTF EC+ terminals of interface P1 used for connecting the radio frequency thermocoagulation equipment. The ADC EC- and ADC EC+ terminals on relay K1 are connected to the ADC EC- and ADC EC+ terminals of the signal acquisition circuit. The EC+ terminal on relay K1 is connected to the EC+ terminals on K3, K5, K7, and K9 respectively to form a circuit for switching electrode contacts.

[0029] The RTF TC- and RTF TC+ terminals on relay K2 are connected to the RTF TC- and RTF TC+ terminals of interface P1, which is used to connect to the radiofrequency thermocoagulation device. The ADC TC- and ADC TC+ terminals on relay K2 are connected to the ADC TC- and ADC TC+ terminals of the signal acquisition circuit. The TC- and TC+ terminals on relay K2 are connected to interface P2, which is used to connect electrodes. The EC1, EC2, EC3, and EC4 terminals on interface P2 are connected to the EC1 terminal on relay K4, the EC2 terminal on K6, the EC3 terminal on K8, and the EC4 terminal on K10, respectively, forming a radiofrequency therapy circuit.

[0030] Relays K1 and K2, as components of the signal switching circuit, can switch the selected electrode contact to either the radiofrequency thermocoagulation device or the signal acquisition circuit. When the selected electrode contact is switched to the radiofrequency thermocoagulation device, the device switches the radiofrequency signal output by the device to the selected contact for radiofrequency treatment of the lesion tissue. When the selected electrode contact is switched to the signal acquisition circuit, the electrode contact is completely disconnected from the radiofrequency thermocoagulation device. The central processing unit U1 collects the impedance between the contacts through its internal ADC, and can quickly determine the contact status between the electrode and the human tissue based on the impedance, providing assistance for the user's next steps. Example

[0031] Taking relays K3 and K4 as examples, the specific method for switching between three states of a single contact is shown in the following truth table:

[0032] EC1_1_DRV interface level EC1_2_DRV interface level EC1 contact status 0 0 Switching from EC1 to EC+ 0 1 EC1 suspended 1 0 Switching from EC1 to EC- 1 1 EC1 suspended

[0033] The table above clearly shows that by modifying the level of the two control signals, EC1 can freely switch between three states.

[0034] Similarly, relays K5 and K6, K7 and K8, K9 and K10 can switch the other three sets of contacts. Based on the same principle, a sufficient number of contacts with three states can be added.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A radio frequency thermal coagulation contact switching device, comprising a central processing unit U1, a touch chip U2, an LCD liquid crystal display interface M1, a signal expansion circuit, and a signal acquisition circuit, characterized in that: The touch chip U2, capacitor C1, resistor R5 and LCD screen interface M1 form a touch-enabled liquid crystal display circuit. The signal expansion circuit consists of shift registers, and at least one set is provided. The signal acquisition circuit consists of resistors R1, R2, R3 and R4. An electromagnetic relay is connected to the signal expansion circuit. The liquid crystal display circuit, the signal expansion circuit and the signal acquisition circuit are connected to the central processing unit U1. M1 is an LCD screen with an integrated touch sensor. The touch sensor signal is connected to U2, and the data bus is connected to the central processing unit U1. U2 is a touch screen acquisition chip, which is connected to the central processing unit U1 via the IIC bus. The central processing unit U1 displays the electrode model and the corresponding contact layout diagram to the user through M1. The user sets the state of the contact through the touch screen. Any selectable contact can be set to positive, negative, or floating. Multiple contacts can be selected at the same time. The central processing unit U1 obtains the electrode model and the corresponding contact combination selected by the user through the touch screen acquisition chip, and transmits the encoded signal to the signal expansion module through the serial bus DATA, RCLK, and SCLK. The electromagnetic relays include relays K1-K10, and relays K1 and K2 are components of the signal switching circuit. The RTF EC- and RTF EC+ terminals on relay K1 are connected to the RTF EC- and RTF EC+ terminals of the radio frequency thermocoagulation equipment interface P1, respectively. The ADC EC- and ADC EC+ terminals on relay K1 are also connected to the RTF EC- and RTF EC+ terminals of the radio frequency thermocoagulation equipment interface P1, respectively. The ADC EC- and ADC EC+ terminals on relay K1 are also connected to the ADC EC- and ADC EC+ terminals of the signal acquisition circuit, respectively. The EC+ terminal on relay K1 is connected to the EC+ terminals of relays K3, K5, K7, and K9, respectively, forming a circuit for switching electrode contacts. The RTF TC- and RTF TC+ terminals on relay K2 are connected to the RTF TC- and RTF TC+ terminals of the radio frequency thermocoagulation equipment interface P1, respectively. The ADC TC- and ADC TC+ terminals on relay K2 are also connected to the ADC TC- and ADC EC+ terminals of the signal acquisition circuit, respectively. The TC+ terminal, the TC- terminal and the TC+ terminal on relay K2 are connected to the TC- terminal and the TC+ terminal on interface P2, which is used to connect electrodes. The EC1, EC2, EC3 and EC4 terminals on interface P2 are connected to the EC1 terminal on relay K4, the EC2 terminal on K6, the EC3 terminal on K8 and the EC4 terminal on K10, respectively, to form a radiofrequency therapy circuit.

2. The radio frequency thermal coagulation contact switching device as described in claim 1, characterized in that: On the LCD screen interface M1 of the liquid crystal display circuit, the XL terminal is connected to the Y- terminal of the touch chip U2, the YD terminal is connected to the X- terminal of the touch chip U2, the XR terminal is connected to the Y+ terminal of the touch chip U2, and the YU terminal is connected to the X+ terminal of the touch chip U2. The GND terminal, ADD0 terminal, and ADD1 terminal of the touch chip U2 are connected to one end of the capacitor C1 and grounded. The other end of the capacitor C1 is connected to the VCC terminal of the touch chip U2, one end of the resistor R5, and one end of the resistor R6. The other end of the resistor R5 is connected to the SCL terminal of the touch chip U2, and the other end of the resistor R6 is connected to the SDA terminal of the touch chip U2.

3. The radio frequency thermal coagulation contact switching device as described in claim 1, characterized in that: The signal expansion circuit consists of a shift register U3 and a driver chip U5. The Q1 terminal of shift register U3 is connected to the IN1 terminal of driver chip U5; the Q2 terminal of shift register U3 is connected to the IN2 terminal of driver chip U5; the Q3 terminal of shift register U3 is connected to the IN3 terminal of driver chip U5; the Q4 terminal of shift register U3 is connected to the IN4 terminal of driver chip U5; the Q5 terminal of shift register U3 is connected to the IN5 terminal of driver chip U5; the Q6 terminal of shift register U3 is connected to the IN6 terminal of driver chip U5; the Q7 terminal of shift register U3 is connected to the IN7 terminal of driver chip U5; the GND terminal of shift register U3 is connected to the GND terminal of driver chip U5; the / MR terminal of shift register U3 is connected to the VCC terminal of shift register U3 and to one end of capacitor C2; the other end of capacitor C2 is connected to GND. The shift register U4 and driver chip U5 are also connected. The driver chip U6 forms another group. The Q1 terminal of the shift register U4 is connected to the IN1 terminal of the driver chip U6, the Q2 terminal of the shift register U4 is connected to the IN2 terminal of the driver chip U6, the Q3 terminal of the shift register U4 is connected to the IN3 terminal of the driver chip U6, the Q4 terminal of the shift register U4 is connected to the IN4 terminal of the driver chip U6, the Q5 terminal of the shift register U4 is connected to the IN5 terminal of the driver chip U6, the Q6 terminal of the shift register U4 is connected to the IN6 terminal of the driver chip U6, the Q7 terminal of the shift register U4 is connected to the IN7 terminal of the driver chip U6, the GND terminal of the shift register U4 is connected to the GND terminal of the driver chip U6, the / MR terminal of the shift register U4 is connected to the VCC terminal of the driver chip U6 and connected to one end of the capacitor C3, and the other end of the capacitor C3 is connected to GND; the Q7S terminal of the shift register U3 is connected to the DS terminal of the shift register U4.

4. The radio frequency thermocoagulation contact switching device as described in claim 1, characterized in that: The DB7, DB6, DB5, DB4, DB3, DB2, DB1, DB0, RD, WR, RS, and CS terminals of the central processing unit U1 are sequentially connected to the DB7, DB6, DB5, DB4, DB3, DB2, DB1, DB0, RD, WR, RS, and CS terminals of the LCD display interface M1. The DATA terminal of the central processing unit U1 is connected to the DS terminal of the shift register U3. The RCLK terminal of the central processing unit U1 is connected to the STCP terminals of the shift register U3 and U4. The SCLK terminal of the central processing unit U1 is connected to the SHCP terminals of the shift register U3 and U4. The CPU U1's INT0 terminal is connected to the touch chip U2's PQ / INT terminal; the CPU U1's SCL terminal is connected to the touch chip U2's SCL terminal; the CPU U1's SDA terminal is connected to the touch chip U2's SDA terminal; the CPU U1's CH0+ terminal is connected to one end of resistor R1, with the other end of resistor R1 being VCC; the CPU U1's CH0- terminal is connected to one end of resistor R2, with the other end of resistor R2 being GND; the CPU U1's CH1+ terminal is connected to one end of resistor R3, with the other end of resistor R3 being VCC; and the CPU U1's CH1- terminal is connected to one end of resistor R4, with the other end of resistor R4 being GND.

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