Low-power-consumption vibrating wire signal acquisition terminal equipment

Abstract

The utility model discloses low-power-consumption vibrating wire signal acquisition terminal equipment, which comprises a central processing module, a vibrating wire interface circuit, an SD (Secure Digital) card interface circuit, a wireless communication interface circuit, an Ethernet interface circuit, a serial port switching circuit, a battery charging and discharging circuit and a power supply conversion module, the central processing module and the power supply conversion module are respectively connected with the vibrating wire interface circuit, the SD card interface circuit, the wireless communication interface circuit, the Ethernet interface circuit, the serial port switching circuit and the battery charging and discharging circuit; the vibrating wire interface circuit is connected with the vibrating wire type sensor, the wireless communication interface circuit is connected with the upper computer through the wireless communication module, the Ethernet interface circuit is connected with the upper computer, the vibrating wire interface circuit is provided with two channels, and each channel supports access of four paths of vibrating wire signals and is used for converting the vibrating wire signals of the vibrating wire type sensor into digital signals; the battery charging and discharging circuit is used for providing a driving power supply for equipment. The power supply conversion module is used for converting and distributing an input power supply to each circuit module.

Description

Technical Field

[0001] The utility model relates to the technical field of dam safety monitoring. Specifically, it particularly relates to a low-power vibrating wire signal acquisition terminal device for monitoring the sensing data of a dam. Background Art

[0002] At present, the commonly used monitoring sensors in the field of dam safety monitoring generally include piezometers, crack displacement gauges, static level gauges, tension wire meters, concrete strain gauges, etc. Compared with traditional digital sensors, vibrating wire sensors have high accuracy, high sensitivity, fast response speed, and are not easily affected by the environment, and are suitable for dam safety monitoring. However, traditional acquisition terminal devices only collect digital quantities and access the signals output by vibrating wire sensors through an additional vibrating wire signal to digital signal module. This solution has many functional modules, and there are problems of greater installation difficulty and higher energy consumption in multi-point monitoring, which is not convenient for on-site installation and operation and maintenance. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems of greater installation difficulty and higher energy consumption of existing vibrating wire signal acquisition devices in multi-point monitoring of dam safety monitoring, and to provide a low-power vibrating wire signal acquisition terminal device, improve the modularity of the product, perform data interaction with a water level computer through a network, be able to accurately measure the vibrating wire parameters of each channel, and calculate the actual measured values of the sensors connected to each channel according to the frequency and temperature values respectively.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A low-power vibrating wire signal acquisition terminal device includes a central processing module, a vibrating wire interface circuit, an SD card interface circuit, a wireless communication interface circuit, an Ethernet interface circuit, a serial port switching circuit, a battery charge and discharge circuit, and a power conversion module. The central processing module and the power conversion module are respectively connected to the vibrating wire interface circuit, the SD card interface circuit, the wireless communication interface circuit, the Ethernet interface circuit, the serial port switching circuit, and the battery charge and discharge circuit;

[0006] The vibrating wire interface circuit is connected to an external vibrating wire sensor. The wireless communication interface circuit is connected to a host computer through a wireless 4G communication module. The Ethernet interface circuit is connected to the host computer through a wired network. The vibrating wire interface circuit has two channels, and each channel supports the access of 4 vibrating wire signals, and is used to convert the vibrating wire signals of the vibrating wire sensor into digital signals;

[0007] The SD card interface circuit is used to store and export file data. The serial port switching circuit is used to switch the interface types of RS485 and RS232. The battery charge and discharge circuit is used to provide the corresponding driving power for the device. The power conversion module is used to convert and distribute the input power to each circuit module.

[0008] Furthermore, the central processing module adopts a microprocessing unit with the model number STM32L476RCT6.

[0009] Furthermore, the vibrating wire interface circuit adopts a vibrating wire conversion module with the model number VM604. The acquisition of the vibrating wire signal is achieved by connecting an external vibrating wire sensor through the vibrating wire conversion module with the model number VM604, and connecting to the central processing module through the UART bus.

[0010] Furthermore, the SD card interface circuit includes an SD card socket and a TVS tube. After the SD card is inserted into the SD card socket, the SD card signal reaches the central processing module through the TVS tube, and the model of the TVS tube is SWSRV05-4.

[0011] Furthermore, the wireless communication interface circuit transmits the TTL signal, status monitoring signal, and power control signal of the central processing module's UART bus to the wireless 4G communication module.

[0012] Furthermore, the Ethernet interface circuit adopts an Ethernet chip with the model number W5500, and the central processing module is connected to the Ethernet chip through the SPI bus.

[0013] Furthermore, the serial port switching circuit includes an RS232 circuit, an RS485 circuit, a switching switch, and an interface protection circuit. The RS232 circuit, RS485 circuit, and interface protection circuit are respectively connected to the switching switch. The RS232 circuit adopts an RS232 conversion chip with the model number MAX3232, the RS485 circuit adopts an RS485 conversion chip with the model number SP3485, and the switching switch adopts a four-channel single-pole double-throw chip with the model number CH440R.

[0014] Furthermore, the input signal lines RS232TXD and RS232RXD of the RS232 circuit are respectively connected to the 1A channel and 1B channel of the four-channel single-pole double-throw chip. The input signal lines RS485TXD and RS485RXD of the RS485 circuit are respectively connected to the 2A channel and 2B channel of the four-channel single-pole double-throw chip. The common ends of the A channel and B channel of the four-channel single-pole double-throw chip are respectively connected to the TX4 and RX4 signal pins of the central processing module's UART bus;

[0015] The output signal lines RS232T and RS232R of the RS232 circuit are respectively connected to the 1D channel and 1C channel of the four-channel single-pole double-throw chip. The output signal lines RS485A and RS485B of the RS485 circuit are respectively connected to the 2D channel and 2C channel of the four-channel single-pole double-throw chip. The common ends of the D channel and C channel of the four-channel single-pole double-throw chip are respectively connected to the input T and R signal pins of the interface protection circuit.

[0016] Furthermore, the battery charging and discharging circuit uses a battery management chip of model CN3795 and a power input interface protection circuit composed of a gas discharge tube, a power inductor, a transient voltage suppressor diode, and a varistor.

[0017] Furthermore, the power conversion module uses a DC conversion chip of model TPS54331 to convert the input power supply into a DC 5V voltage; uses a linear voltage regulator chip of model AMS1117M to convert the DC 5V voltage into a DC 3.3V voltage; uses a boost voltage regulator chip of model AP3012KTR-G1 to boost the DC 3.3V voltage to a DC 8V voltage to provide a control power supply for the vibrating wire conversion module.

[0018] Compared with the prior art, the utility model can accurately measure the vibrating wire parameters of each channel in the multi-point monitoring of dam safety monitoring, calculate the actual measurement values of the sensors connected to each channel according to the frequency and temperature values respectively, and adopts a modular design, which is convenient and simple to install, has low power consumption, and can meet the requirements of dam safety monitoring occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial structural block diagram of the low-power vibrating wire signal acquisition terminal device of the utility model.

[0020] Figure 2 It is a schematic diagram of the battery charging and discharging circuit in the embodiment.

[0021] Figure 3 It is a schematic diagram of the power conversion circuit for converting the input power supply to DC 5V in the embodiment.

[0022] Figure 4 It is a schematic diagram of the power conversion circuit for converting DC 5V to DC 3.3V in the embodiment.

[0023] Figure 5 It is a schematic diagram of the power conversion circuit for converting DC 3.3V to DC 8V in the embodiment.

[0024] Figure 6 It is a schematic diagram of the vibrating wire interface circuit in the embodiment.

[0025] Figure 7 It is a schematic diagram of the SD card interface circuit in the embodiment.

[0026] Figure 8 It is a schematic diagram of the wireless communication interface circuit in the embodiment.

[0027] Figure 9 It is a schematic diagram of the Ethernet interface circuit in the embodiment.

[0028] Figure 10 It is a schematic diagram of the serial port switching circuit in the embodiment. Specific Embodiments

[0029] The following further describes the low-power vibrating wire signal acquisition terminal device of the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0030] Please refer to Figure 1 , the present utility model discloses a low-power vibrating wire signal acquisition terminal device, including a central processing module, a vibrating wire interface circuit, an SD card interface circuit, a wireless communication interface circuit, an Ethernet interface circuit, a serial port switching circuit, a battery charging and discharging circuit, and a power conversion module. The central processing module and the power conversion module are respectively connected to the vibrating wire interface circuit, the SD card interface circuit, the wireless communication interface circuit, the Ethernet interface circuit, the serial port switching circuit, and the battery charging and discharging circuit.

[0031] The vibrating wire interface circuit is connected to an external vibrating wire sensor. The wireless communication interface circuit is connected to a host computer through a wireless 4G communication module. The Ethernet interface circuit is connected to the host computer through a wired network. The vibrating wire interface circuit has two channels, and each channel supports the access of 4 vibrating wire signals, and is used to convert the vibrating wire signals of the external vibrating wire sensor into digital signals.

[0032] The central processing module is used to manage and control the entire device. The SD card interface circuit is used to store and export file data. The serial port switching circuit is used to switch the interface types of RS485 and RS232. The battery charging and discharging circuit is used to provide the corresponding driving power for the device. The power conversion module is used to convert and distribute the input power to each circuit module.

[0033] Specifically, the central processing module adopts a microprocessing unit with the model number STM32L476RCT6. The vibrating wire interface circuit adopts a vibrating wire conversion module with the model number VM604. The acquisition of the vibrating wire signal is connected to an external vibrating wire sensor through a vibrating wire conversion module with the model number VM604, and is connected to the central processing module through the UART bus.

[0034] Specifically, the SD card interface circuit includes an SD card socket and a TVS tube. After the SD card is inserted into the SD card socket, the SD card signal reaches the central processing module through the TVS tube. The model number of the TVS tube is SWSRV05-4. The wireless communication interface circuit transmits the TTL signal, status monitoring signal, and power control signal of the central processing module's UART bus to the wireless 4G communication module. The Ethernet interface circuit adopts an Ethernet chip with the model number W5500, and the central processing module is connected to the Ethernet chip through the SPI bus.

[0035] Specifically, the serial port switching circuit includes an RS232 circuit, an RS485 circuit, a switching switch, and an interface protection circuit. The RS232 circuit, the RS485 circuit, and the interface protection circuit are respectively connected to the switching switch. The RS232 circuit uses an RS232 conversion chip of model MAX3232, the RS485 circuit uses an RS485 conversion chip of model SP3485, and the switching switch uses a four-channel single-pole double-throw chip of model CH440R.

[0036] The input signal lines RS232TXD and RS232RXD of the RS232 circuit are respectively connected to the 1A channel and the 1B channel of the four-channel single-pole double-throw chip. The input signal lines RS485TXD and RS485RXD of the RS485 circuit are respectively connected to the 2A channel and the 2B channel of the four-channel single-pole double-throw chip. The common terminals of the A channel and the B channel of the four-channel single-pole double-throw chip are respectively connected to the TX4 and RX4 signal pins of the UART bus of the central processing module.

[0037] The output signal lines RS232T and RS232R of the RS232 circuit are respectively connected to the 1D channel and the 1C channel of the four-channel single-pole double-throw chip. The output signal lines RS485A and RS485B of the RS485 circuit are respectively connected to the 2D channel and the 2C channel of the four-channel single-pole double-throw chip. The common terminals of the D channel and the C channel of the four-channel single-pole double-throw chip are respectively connected to the input terminals T and R signal pins of the interface protection circuit.

[0038] Specifically, the battery charge and discharge circuit uses a battery management chip of model CN3795 and a power input interface protection circuit composed of a gas discharge tube, a power inductor, a transient suppression diode, and a varistor.

[0039] As Figure 2 shown, in the battery charge and discharge circuit, the power input interface protection circuit is composed of a gas discharge tube U15, power inductors L5, L6, transient suppression diodes VR7, VR8, VR9, and a varistor VSR1. The cathode of the Schottky diode D11 is connected to the positive power supply, and the anode is connected to the negative power supply to prevent reverse power connection. The electrolytic capacitor EC3 and ceramic capacitors C66, C67 are connected in parallel across the positive and negative power supplies to filter the power input signal. The power input signal is input to the 9-pin VCC of the battery management chip U16 of model CN3795 and the source of the P-channel MOSFET Q5 of model IRF4435 through the power input interface protection circuit.

[0040] The 10-pin DRV of the battery management chip U16 is connected to the gate of the P-channel MOSFET Q5. The power signal is output from the drain of the P-channel MOSFET Q5, and after passing through the Schottky diode D9, the power inductor L4, and the sampling resistor R64, it is input into the battery and the load device. The anode of the Schottky diode D10 is connected to the negative power supply, and the cathode is connected between the Schottky diode D9 and the power inductor L4, which plays a role in stabilizing the output power supply. The two ends of the sampling resistor R64 are respectively connected to the 7-pin BAT and the 8-pin CSP of the battery management chip U16 to detect the charging and discharging current conditions.

[0041] Specifically, the power conversion module uses a DC conversion chip of model TPS54331 to convert the input power supply into a DC 5V voltage. The power conversion module uses a linear voltage regulator chip of model AMS1117M to convert the DC 5V voltage into a DC 3.3V voltage. The power conversion module uses a boost voltage regulator chip of model AP3012KTR-G1 to boost the DC 3.3V voltage to a DC 8V voltage to provide a control power supply for the vibrating wire conversion module.

[0042] As Figure 3 shown, in the power conversion module, the DC conversion chip U5 of model TPS54331 converts the input power supply into DC 5V. The power signal is input from the 2-pin VIN of the DC conversion chip U5, and after conversion, a DC 5V signal is output from the 8-pin PH of the DC conversion chip U5. After passing through the inductor L1 and the electrolytic capacitor EC1, the ceramic capacitors C29 and C30, DC 5V is provided to the power-consuming module. The zener diode D2 plays a role in stabilizing the voltage and protecting the circuit.

[0043] As Figure 4 shown, in the power conversion module, the linear voltage regulator chip U7 of model AMS1117M converts DC 5V into DC 3.3V. DC 5V is input into the 3-pin VIN of the linear voltage regulator chip U7 through the diode D5, and after conversion, DC 3.3V is output from the 2-pin and 4-pin VOUT of the linear voltage regulator chip U7. The tantalum capacitor E1 and the ceramic capacitor C42 are connected in parallel to the input end of the linear voltage regulator chip U7, and the tantalum capacitor E2 and the ceramic capacitor C43 are connected in parallel to the output end of the linear voltage regulator chip U7, both of which play a role in power filtering.

[0044] As Figure 5 shown, in the power conversion module, the boost voltage regulator chip U6 of model AP3012KTR-G1 converts DC 3.3V into DC 8V. DC 3.3V is input into the 5-pin VIN of the boost voltage regulator chip U6, and after filtering through the inductor L2, the diode D1, and the ceramic capacitors C31 and C32, it is boosted and regulated to output DC 8V. The zener diode D3 is used to stabilize the voltage and protect the circuit.

[0045] AsFigure 6 As shown in the figure, in the vibrating wire interface circuit, the signals of the vibrating wire sensor are connected to the terminal device from terminals COM1 and COM2, and directly connected to the vibrating wire conversion module U19 of model VM604. The positive pole of the vibrating wire signal is connected to pins 2, 3, 4, and 5 (S1+, S2+, S3+, S4+) of the vibrating wire conversion module U19, and the negative pole of the vibrating wire signal is connected to pin 1 (S-) of the vibrating wire conversion module U19. The positive pole of the temperature signal is connected to pins 19, 18, 17, and 16 (T1, T2, T3, T4) of the vibrating wire conversion module U19, and the negative pole of the temperature signal is connected to the negative power supply GND. The 8V power signal VSEN output by the boost voltage regulator chip U6 is input to pin 20 (VSEN) of the vibrating wire conversion module U19. Pins 12 (TXD) and 13 (RXD) of the vibrating wire conversion module U19 are UART bus communication lines, which are connected to the central processing module for data interaction.

[0046] As Figure 7 shown, in the SD card interface circuit, pins 2, 3, 5, and 7 of the SD card socket CON3 respectively provide the CS, MOSI, SCK, and MISO signals of the SPI bus to the central processing module. Pins 1, 4, and 6 of the TVS tube of model SWSRV05-4 are respectively connected to the MOSI, SCK, and MISO signals of the SD card socket CON3 to suppress instantaneous overvoltage and protect the SD card.

[0047] As Figure 8 shown, in the wireless communication interface circuit, pin 1 (RST), pin 7 (RXD), and pin 8 (TXD) of the wireless 4G communication module U3 are respectively connected to the IOT_RST pin of the central processing module, the TX1 pin of the UART bus, and the RX1 pin of the UART bus. The power signal is connected to the source electrode of the P-channel field effect transistor Q1 through the filter capacitor C19. The drain electrode of the P-channel field effect transistor Q1 is connected to pin 16 (VCC) of the wireless 4G communication module U3. The gate electrode of the P-channel field effect transistor Q1 is connected to pin 3 of the triode Q2 through the resistor R19. Pin 1 of the triode Q2 is connected to the IOT_EN pin of the central processing module to enable the wireless 4G communication module U3, and is pulled down to the negative power supply GND through the pull-down resistor R22.

[0048] As Figure 9 shown, in the Ethernet interface circuit, the Ethernet RJ45 integrated transformer interface CON1 of model HR911105A respectively provides Ethernet TXN, TXP, RXN, and RXP to pins 1, 2, 5, and 6 of the Ethernet chip U1 of model W5500. The Ethernet chip U1 transmits the CS, SCK, MISO, and MOSI signals of pins 32, 33, 34, and 35 to the central processing module through the SPI bus.

[0049] AsFigure 10 As shown in the figure, in the serial port switching circuit, pin 1 IN, pin 4 DA, and pin 7 DB of the four-channel single-pole double-throw chip U10 of model CH440R are respectively connected to the channel selection pin IN of the central processing module, the TX4 pin of the UART bus, and the RX4 pin of the UART bus. Pin 12 DD of the four-channel single-pole double-throw chip U10 is connected to the input end T signal of the interface protection circuit, and pin 9 DC is connected to the input end R signal of the interface protection circuit. Pin 2 S1A, pin 5 S1B, pin 3 S2A, and pin 6 S2B of the four-channel single-pole double-throw chip U10 are respectively connected to the signal input ends of the RS232 circuit and the RS485 circuit, and pin 14 S1D, pin 11 S1C, pin 13 S2D, and pin 10 S2C are respectively connected to the signal output ends of the RS232 circuit and the RS485 circuit.

[0050] Pin 1 RO of the RS485 conversion chip U13 of model SP3485 is connected to the serial port RS485RXD pin of the signal input end and is pulled up to DC 3.3V through a pull-up resistor. Pin 2 RE and pin 3 DE of the RS485 conversion chip U13 are simultaneously connected to pin 3 of the triode Q4 and are pulled up to DC 3.3V through a pull-up resistor. Pin 1 of the triode Q4 is connected to the serial port RS485TXD pin of the signal input end and is pulled up to DC 3.3V through a pull-up resistor. Pin 2 of the triode Q4 is connected to pin 4 DI of the RS485 conversion chip U13 and is simultaneously pulled down to the ground wire.

[0051] Pin 6 A and pin 7 B of the RS485 conversion chip U13 are respectively connected to the RS485A and RS485B pins of the signal output end. Pin 11 T1IN and pin 12 R1OUT of the RS232 conversion chip U9 of model MAX3232 are respectively connected to the serial port RS232TXD pin and the RS232RXD pin of the signal input end. Pin 14 T1OUT and pin 13 R1IN are respectively connected to the RS232T and RS232R pins of the signal output end. The input end T signal and R signal of the interface protection circuit are respectively communicated with the external device through the bead FB4, FB5 and the resistors R55, R59, the TVS tubes VR4, VR5, VR6 of model SMAJ5.0CA and the thermistors PTC3, PTC4 of model FSMD010.

[0052] In summary, the utility model adopts a modular design, improves the modular degree of the product, performs data interaction with the water level computer through the network, accurately measures the vibrating wire parameters of each channel in the multi-point monitoring of dam safety monitoring, calculates the actual measured values of the sensors connected to each channel according to the frequency and temperature values respectively, and is easy to install, has low power consumption, and can meet the requirements of dam safety monitoring occasions.

[0053] The above description is a detailed description of the preferred and feasible embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. Any equivalent changes or modifications made under the technical spirit disclosed by the present utility model shall fall within the scope of the patent covered by the present utility model.

Claims

1. A low-power vibrating string signal acquisition terminal device, characterized in that: It includes a central processing module, a vibrating string interface circuit, an SD card interface circuit, a wireless communication interface circuit, an Ethernet interface circuit, a serial port switching circuit, a battery charging and discharging circuit and a power conversion module, wherein the central processing module and the power conversion module are respectively connected to the vibrating string interface circuit, the SD card interface circuit, the wireless communication interface circuit, the Ethernet interface circuit, the serial port switching circuit and the battery charging and discharging circuit; The vibrating string interface circuit is connected to an external vibrating string sensor, the wireless communication interface circuit is connected to a host computer through a wireless 4G communication module, and the Ethernet interface circuit is connected to a host computer through a wired network. The vibrating string interface circuit has two channels, each channel supports 4-way vibrating string signal access, and is used to convert the vibrating string signal of the vibrating string sensor into a digital signal; The SD card interface circuit is used to store the exported file data, the serial port switching circuit is used to switch the interface types between RS485 and RS232, the battery charging and discharging circuit is used to provide the corresponding driving power for the device, and the power conversion module is used to convert the input power and distribute it to each circuit module.

2. The low-power vibrating-string signal acquisition terminal device according to claim 1, characterized in that: The central processing module uses a microprocessor unit model STM32L476RCT6.

3. The low-power vibrating string signal acquisition terminal device according to claim 1, characterized in that: The vibrating string interface circuit adopts a vibrating string conversion module of model VM604. The collection of vibrating string signals is connected to an external vibrating string sensor through the vibrating string conversion module of model VM604, and is connected to a central processing module through a UART bus.

4. The low-power vibrating string signal acquisition terminal device according to claim 1, characterized in that: The SD card interface circuit includes an SD card socket and a TVS tube. After the SD card is connected to the SD card socket, the SD card signal reaches the central processing module through the TVS tube. The TVS tube model is SWSRV05-4.

5. The low-power vibrating string signal acquisition terminal device according to claim 1, characterized in that: The wireless communication interface circuit transmits the TTL signal, status monitoring signal and power control signal of the UART bus of the central processing module to the wireless 4G communication module.

6. The low-power vibrating string signal acquisition terminal device according to claim 1, characterized in that: The Ethernet interface circuit uses an Ethernet chip of model W5500, and the central processing module is connected to the Ethernet chip through the SPI bus.

7. The low-power vibrating-string signal acquisition terminal device according to claim 1, characterized in that: The serial port switching circuit includes an RS232 circuit, an RS485 circuit, a switching switch and an interface protection circuit. The RS232 circuit, the RS485 circuit and the interface protection circuit are respectively connected to the switching switch. The RS232 circuit adopts an RS232 conversion chip of model MAX3232, the RS485 circuit adopts an RS485 conversion chip of model SP3485, and the switching switch adopts a four-channel single-pole double-throw chip of model CH440R.

8. The low-power vibrating string signal acquisition terminal device according to claim 7, characterized in that: RS232 circuit input signal lines RS232TXD and RS232RXD are respectively connected to the 1A channel and 1B channel of the four-channel single-pole double-throw chip, RS485 circuit input signal lines RS485TXD and RS485RXD are respectively connected to the 2A channel and 2B channel of the four-channel single-pole double-throw chip, and the common ends of the A channel and the B channel of the four-channel single-pole double-throw chip are respectively connected to the TX4 and RX4 signal pins of the UART bus of the central processing module; The RS232 circuit output signal lines RS232T and RS232R are respectively connected to the 1D channel and 1C channel of the four-channel single-pole double-throw chip, the RS485 circuit output signal lines RS485A and RS485B are respectively connected to the 2D channel and 2C channel of the four-channel single-pole double-throw chip, and the common ends of the D channel and C channel of the four-channel single-pole double-throw chip are respectively connected to the T and R signal pins of the interface protection circuit input terminal.

9. The low-power vibrating string signal acquisition terminal device according to claim 1, characterized in that: The battery charging and discharging circuit adopts a battery management chip model CN3795 and a power input interface protection circuit composed of a gas discharge tube, a power inductor, a transient suppression diode and a varistor.

10. The low-power vibrating string signal acquisition terminal device according to claim 1, characterized in that: The power conversion module uses a DC conversion chip with model number TPS54331 to convert the input power into a DC 5V voltage; a linear voltage regulator chip with model number AMS1117M to convert the DC 5V voltage into a DC 3.3V voltage; and a boost voltage regulator chip with model number AP3012KTR-G1 to boost the DC 3.3V voltage to a DC 8V voltage to provide control power for the vibrating string conversion module.

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