Hydrogen absorption machine control circuit based on solid hydrolysis material

Abstract

The utility model discloses a hydrogen absorption machine control circuit based on a solid hydrolysis material, relates to the field of hydrogen absorption machine control circuits, aims to solve the problems of many devices, large volume and complex structure in the prior art, and adopts the technical scheme that a state indicating lamp is directly powered by a single chip microcomputer, the power supply is stable, and the reliability is high. A panel work indicating lamp adopts a double-color RGB indicating lamp, the circuit design is simple, and the control is convenient; the battery power supply voltage detection circuit adopts a resistor voltage division mode and is connected to an ADC acquisition pin of a single chip microcomputer through an operational amplifier voltage following circuit, and an analog ground and a digital ground in the circuit are bridged through a 0R resistor, so that interference between analog signals and digital signals is effectively reduced; a Darlington transistor is adopted as a driving IC, the circuit design is simple, the number of peripheral devices is small, the driving capacity is high, the water pump driving part is in two-way parallel connection, the driving capacity is high, and the circuit stability is high; the screen design of the man-machine interaction unit adopts a serial port HMI, and the interface circuit is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen inhaler control circuits, and specifically to a hydrogen inhaler control circuit based on solid hydrolysis materials. Background Art

[0002] Currently, basically all hydrogen inhalers on the market use electrolytic water hydrogen production technology to generate hydrogen for users. This technology decomposes water into hydrogen and oxygen through an electrochemical reaction. However, when this technology is applied, control factors such as voltage, current, temperature, and pressure in the hydrogen production circuit are easily affected by the environment and fluctuate, making it difficult to provide good control and regulation for hydrogen production. Moreover, since hydrogen has an explosion risk after reaching a certain concentration, the hydrogen production technology by hydrolyzing solid hydrolysis hydrogen production materials can avoid the influence of factors such as voltage and current. However, a stable hydrogen production control circuit that can accurately control is still needed to control the hydrogen production rate. Existing water pump drive circuits mostly use triodes or relays for driving, with a large number of components and a large volume. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a hydrogen inhaler control circuit based on solid hydrolysis materials, which can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the utility model discloses a hydrogen inhaler control circuit based on solid hydrolysis materials. The technical solution adopted is that it includes a control chip and a power supply unit. The control chip is installed on a control board and is connected to a chip power supply circuit, a water pump drive circuit for the hydrogen production unit, a solenoid valve drive circuit for the hydrogen production unit, a status indicator light circuit, and a communication interface for the human-machine interaction unit. The power supply unit is connected to the chip power supply circuit. The water pump drive circuit for the hydrogen production unit and the solenoid valve drive circuit for the hydrogen production unit are both connected to a Darlington transistor U8. The Darlington transistor U8 is connected to the control chip. By using the Darlington transistor U8 as a driving IC, it is possible to maintain a high driving ability while reducing peripheral devices and simplifying the circuit design. The water pump drive circuit for the hydrogen production unit has one or more, and each water pump drive circuit for the hydrogen production unit has a plurality of drive channels connected in parallel on the Darlington transistor U8 to ensure the driving force. There is a power supply battery on the control board. The control chip is also connected to an analog signal circuit for detecting the battery voltage. The control chip is connected to a low-pass filter of the analog signal circuit for detecting the battery voltage. The low-pass filter is connected to a voltage follower circuit and then connected to the output end of an operational amplifier U4. The positive output end of the operational amplifier is connected to a voltage dividing resistor and then connected to the battery supply voltage signal.

[0005] As a preferred technical solution of the present utility model, two pins, namely PA2 and PA3 of the control chip, are connected to the signal control pins of the water pump drive circuit of the hydrogen production unit, two pins, namely PA5 and PA6, are connected to the signal control pins of the solenoid valve drive circuit of the hydrogen production unit, the PA8 pin is connected to the status indicator light of the control board, two pins, namely PA9 and PA10, are connected to the communication interface of the serial port HMI of the human-computer interaction unit, two pins, namely PA11 and PA12, are connected to the status indicator lights of the control device, and the ADC acquisition pin is connected to the analog signal circuit for battery voltage detection.

[0006] As a preferred technical solution of the present utility model, the power supply unit further includes a socket CN1 and an external power switch CN11. The socket CN1 is connected to the power supply battery. The 1# port of the socket CN1 is connected to the 1# port of the external power switch CN11. The 2# port of the external power switch CN11 is connected to the on-board power switch HX1. The on-board power switch HX1 is connected to the D pole of the MOS tube Q2 of the DCDC conversion circuit. The G pole of the MOS tube Q2 is grounded through a resistor R53. The S pole of the MOS tube Q2 is connected to the subsequent DC12V power supply circuit. The DC12V power supply circuit is connected in parallel with a synchronous buck converter U9 and a capacitor C20. The capacitor C20 is grounded. The subsequent end of the synchronous buck converter U9 is connected to a buck coil L2 and then connected to a DC5V power supply circuit. The DC5V power supply circuit is connected to a voltage regulator U2 and then connected to a buck coil L1 and a buck coil L5 and then connected to a DC3.3V power supply circuit. The front ends of the buck coil L1 and the buck coil L5 are respectively connected in parallel with a VDD-3V3 output voltage circuit and a VDD-3V3-MCU output voltage circuit. The DC3.3V power supply circuit is connected to the VBAT pin of the control chip.

[0007] As a preferred technical solution of the present utility model, the status indicator light circuit of the control board further includes an indicator light LED2. One end of the indicator light LED2 is connected to the PA8 pin of the control chip, and the other end is connected to a resistor R6 and then connected to the DC3.3V power supply circuit. Two pins, namely PA11 and PA12, are respectively connected to the 2# port and the 3# port of the pin header connector CN14. The 1# port of the pin header connector CN14 is connected to a resistor R11 and then connected to the DC3.3V power supply circuit. The pin header connector CN14 is connected to a two-color LED light. It further includes a power indicator light LED1. One end of the power indicator light LED1 is grounded, and the other end is connected to a resistor R3 and then connected to the DC3.3V power supply circuit.

[0008] As a preferred technical solution of the present utility model, the front end of the positive input terminal of the operational amplifier is connected to a voltage dividing circuit including resistor R24 and resistor R26. The voltage dividing circuit is connected to the battery supply voltage signal at the front. In the voltage dividing circuit, capacitor C23 is also connected in parallel with resistor R26; a voltage follower circuit is also connected to the operational amplifier; the output terminal of the operational amplifier is connected to the ADC acquisition pin of the control chip after passing through a low-pass filter. The low-pass filter includes resistor R23 and capacitor C22 connected in parallel. Resistor R23 is connected to the output terminal of the operational amplifier, and capacitor C22 is connected to the analog ground; the analog ground and the digital ground are bridged by a 0-ohm resistor to effectively reduce the interference between analog signals and digital signals.

[0009] As a preferred technical solution of the present utility model, the PA2 pin of the control chip is connected in parallel with the 3B and 4B pins of the Darlington transistor U8. The 3C and 4C pins of the Darlington transistor U8 are combined and then connected to the rear-end circuit of the execution unit. The rear-end circuit of the execution unit also includes a pin socket. The 2# port of the pin socket is connected to the front-end Darlington transistor U8, and the 1# port of the pin socket is connected to the DC12V power supply circuit; the 1# port and the 2# port of the pin socket are also respectively connected in parallel with a freewheeling diode and a status indicator through two parallel circuits. The status indicator is connected in series with a resistor; the end matching the pin socket is electrically connected to a water pump.

[0010] As a preferred technical solution of the present utility model, the PA5 pin of the control chip is connected to the 1B pin of the Darlington transistor U8. The 1C pin of the Darlington transistor U8 is connected to the rear-end circuit of the execution unit. The end matching the pin socket of the rear-end circuit of the execution unit is electrically connected to a solenoid valve.

[0011] As a preferred technical solution of the present utility model, the human-computer interaction unit includes a host computer. The host computer adopts a serial port HMI design and is provided with a TTL serial port. The 1# port of the TTL serial port is connected to the DC12V power supply circuit, the 2# port is connected to the PA9 pin of the control chip, the 3# port is connected to the PA10 pin of the control chip, and the 4# port is grounded; the interface circuit of this structure is simple, only requiring a total of 4 wires for power supply and communication; the serial port HMI has a dedicated UI development environment and hardware circuit, greatly reducing the burden on the single-chip microcomputer.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model is powered by a main control chip, and the indicator light uses a dual-color RGB indicator light. The circuit design is simple and the control is convenient; in the battery power supply voltage detection circuit, the resistance voltage division method is adopted, and it is connected to the ADC acquisition pin of the single-chip microcomputer through an operational amplifier voltage follower circuit. The analog ground and digital ground in the circuit are connected across by a 0R resistor, effectively reducing the interference between analog signals and digital signals; in the water pump drive circuit of the hydrogen production unit and the solenoid valve drive circuit of the hydrogen production unit, a Darlington transistor is used as the drive IC. The circuit is simple, the peripheral devices are few, and the circuit volume is small. The water pump is driven by the parallel connection of two Darlington transistors, and the driving ability is strong, which can ensure the stability of the circuit; the screen design of the human-computer interaction unit adopts a serial port HMI, and the interface circuit is simple, greatly reducing the burden on the single-chip microcomputer. The present utility model can accurately control the water pump and the solenoid valve, so as to generate stable hydrogen. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a hydrogen inhalation machine controlled by the present utility model;

[0014] Figure 2 It is a circuit framework diagram of the control of the present utility model;

[0015] Figure 3 It is a circuit diagram of the pin function allocation of the single-chip microcomputer of the present utility model;

[0016] Figure 4 It is a chip power supply circuit diagram of the single-chip microcomputer of the present utility model;

[0017] Figure 5 (a) is a control circuit diagram of the status indicator light of the control board of the present utility model;

[0018] Figure 5 (b) is a control circuit diagram of the status indicator light of the hydrogen inhalation machine of the present utility model;

[0019] Figure 6 It is an analog signal circuit diagram of the battery voltage detection of the present utility model;

[0020] Figure 7 It is a circuit diagram of the pin function allocation of the Darlington transistor of the present utility model;

[0021] Figure 8 It is a circuit diagram of the rear end of the first water pump of the present utility model;

[0022] Figure 9 It is a circuit diagram of the rear end of the second water pump of the present utility model;

[0023] Figure 10 It is a circuit diagram of the rear end of the first solenoid valve of the present utility model;

[0024] Figure 11 It is a circuit diagram of the rear end of the second solenoid valve of the present utility model;

[0025] Figure 12 This is the circuit diagram of the TTL serial port connection for the upper computer of the human-computer interaction of the present utility model;

[0026] Figure 13 This is the battery input circuit diagram of the present utility model;

[0027] Figure 14 This is the 12V step-down circuit diagram of the present utility model;

[0028] Figure 15 This is the 5V step-down circuit diagram of the present utility model;

[0029] Figure 16 This is the workflow diagram of the present utility model;

[0030] Figure 17 This is the schematic diagram of the hydrogen production control process of the present utility model.

[0031] In the figure: 1. water storage tank; 2. material bin; 3. hydrogen output interface panel; 4. first water pump; 5. second water pump; 6. first solenoid valve; 7. second solenoid valve. Specific embodiments

[0032] 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 embodiments of 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0033] As Figure 1 shown, the driving device of the circuit disclosed in this embodiment includes a water storage tank 1, a material bin 2 and a hydrogen output interface panel 3. The water storage tank 1 and the material bin 2 are connected by two water supply pipelines, and the first water pump 4 and the second water pump 5 are respectively connected to the two water supply pipelines. Two hydrogen delivery pipelines are connected between the material bin 2 and the hydrogen output interface panel 3, and the first solenoid valve 6 and the second solenoid valve 7 are respectively installed on the two hydrogen delivery pipelines.

[0034] As Figures 2 to 15 shown, the present utility model discloses a hydrogen absorption machine control circuit based on a solid hydrolysis material. The technical solution adopted is that it includes a microprocessor unit. The front end of the microprocessor unit is connected to the system power supply unit, and the rear end is connected to the hydrogen production control unit and the human-computer interaction system. The microprocessor unit, the system power supply unit, the hydrogen production control unit and the human-computer interaction system are all installed on the control board.

[0035] First is the system power supply unit, as Figure 13As shown in the figure, it includes a socket CN1 and an external power switch CN11, both of which use XH-2A C290860 type connectors. The socket CN1 is connected to a power supply battery to provide a 12V voltage input. The 1# port of the socket CN1 is connected to the 1# port of the external power switch CN11. The 2# port of the external power switch CN11 is connected to the on-board power switch HX1. The on-board power switch HX1 uses an MSS22D18G2 type switch. The 2# port of the external power switch CN11 is connected to the 2# port and 5# port of the on-board power switch HX1. The 3# port and 6# port of the on-board power switch HX1 are connected to the D pole of the MOS tube Q2 of the backend DCDC conversion circuit. The MOS tube Q2 uses a 2SJ518 type MOS tube. The G pole of the MOS tube Q2 is grounded through a resistor R53. The S pole of the MOS tube Q2 is connected to the backend DC12V power supply circuit to output a 12V voltage; As Figure 14 As shown in the figure, the DC12V power supply circuit is connected in parallel with a synchronous buck converter U9 and a capacitor C20. The capacitor C20 is grounded. The synchronous buck converter U9 uses an MT1407 type converter. The DC12V power supply circuit is connected to the VIN pin of the synchronous buck converter U9. The VIN pin is connected to the EN pin through a resistor R51. The GND pin is grounded. The BS pin is connected to the SW pin after being connected to a capacitor C29. The SW pin is also connected to a buck coil L2. The backend of the buck coil L2 is connected in parallel with a resistor R52, a capacitor C33, a capacitor C47, and a capacitor C48. The capacitors C47 and C48 are grounded. The FB pin of the synchronous buck converter U9, the resistor R52, and the capacitor C33 are all grounded through a resistor R54. The backend of the buck coil L2 is also connected in parallel with a DC5V power supply circuit to output a 5V voltage; As Figure 15 As shown in the figure, the DC5V power supply circuit is connected in parallel with a polarized capacitor C16, a capacitor C17, and a voltage regulator U2. The voltage regulator U2 uses a 1117 type voltage regulator chip. The GND pins of the polarized capacitor C16, the capacitor C17, and the voltage regulator U2 are all grounded. The TAB pin and the OUT pin of the voltage regulator U2 are combined and then connected in parallel with a polarized capacitor C14, a capacitor C15, a VDD-3V3 output voltage circuit, and a buck coil L1. The backend of the buck coil L1 is connected in parallel with a VDD-3V3-MCU output voltage circuit and a buck coil L5. The buck coil L5 is connected to a VDDA-3V3 output voltage circuit, that is, a DC3.3V power supply circuit; The DC3.3V power supply circuit is connected to the VBAT pin of the control chip.

[0036] As Figure 4As shown in the figure, the microprocessor unit uses an STM32 single-chip microcomputer. Its VBAT pin is connected to the battery, the four pins VDD-1 to 4 are connected to the VDD-3V3-MCU output voltage circuit, the four pins VSS-1 to 4 are grounded, the VDDA pin is connected to the VDDA-3V3 output voltage circuit, and the capacitors C7 and C39 are connected in parallel. The capacitors C7 and C39 are connected to the analog ground. The analog ground and the digital ground are bridged by a 0R resistor R15 to effectively reduce the interference between analog signals and digital signals; VDD-3V3-MCU is grounded after connecting a filter capacitor.

[0037] The PB0 pin of the single-chip microcomputer is the ADC acquisition pin, which is connected to the analog signal circuit for battery voltage detection. As Figure 6 shown, after the battery power supply circuit is connected to the voltage dividing circuit composed of the resistors R24 and R26, it is connected to the non-inverting input terminal of the operational amplifier. The operational amplifier uses an LM358 type operational amplifier, and a capacitor C23 is also connected in parallel to its non-inverting input terminal. The resistor R26 and the capacitor C23 are connected to the analog ground. A voltage follower circuit is also connected between the inverting input terminal and the output terminal of the operational amplifier. Its positive power supply terminal is connected to the DC5V power supply circuit, and its negative power supply terminal is connected to the analog ground; the output terminal of the operational amplifier is connected to a low-pass filter. The low-pass filter includes a resistor R23. The capacitor C22 and the ADC acquisition line are connected in parallel behind the resistor R23. The capacitor C22 is connected to the analog ground, and the ADC acquisition line is connected to the PB0 pin of the single-chip microcomputer.

[0038] As Figure 3 shown, the PA2 and PA3 pins of the single-chip microcomputer are connected to the signal control pins of the driving circuits of the first water pump 4 and the second water pump 5. Among them, it is transitioned through the Darlington transistor U8. The Darlington transistor U8 uses the ULN2003ADR type, and each pin can provide a maximum driving current of 500 mA. Therefore, the 3B and 4B pins are combined and connected to the PA2 pin of the single-chip microcomputer, and the 5B and 6B pins are combined and connected to the PA3 pin of the single-chip microcomputer. The PA5 and PA6 pins of the single-chip microcomputer are connected to the signal control pins of the driving circuits of the first solenoid valve 6 and the second solenoid valve 7. The 3C and 4C pins of the Darlington transistor U8 are combined and connected to the rear-end circuit of the first water pump 4, the 5C and 6C pins are combined and connected to the rear-end circuit of the second water pump 5, the 1C pin is connected to the rear-end circuit of the first solenoid valve 6, the 2C pin is connected to the rear-end circuit of the second solenoid valve 7, and the COM pin is connected to the DC12V power supply circuit. As Figures 8 to 11 shown, the structures of the four rear-end circuits are the same. Taking the rear-end circuit of the first water pump 4 as an example, as Figure 8As shown in the figure, the back-end circuit also includes a pin socket CN7. The pin socket CN7 uses the XH-2A C2908600 type, which includes a pin 1# and a pin 2#. The pin 1# is connected to the DC12V power supply circuit, and the pin 2# is connected to the 3C and 4C pins of the Darlington transistor U8. Moreover, an indicator light LED10 and a freewheeling diode D1 are connected in parallel between the line connected to the pin 1# and the line connected to the pin 2#. The LED10 is of the LED-0603 type in red, and the freewheeling diode D1 is of the 1N4007 type to ensure that the device can be quickly turned off. The indicator light LED10 is connected in series with a resistor R27; the pin socket CN7 is connected to the first water pump 4 serving as the back-end execution unit.

[0039] In order to be able to display the status of the control board, a blue LED power indicator LED1 and a red LED indicator LED2 are installed on the control board. The LED1 uses the LED-0805 type, and the LED2 uses the LED-0603 type. One end of the power indicator LED1 is connected to the DC3.3V power supply circuit after connecting the resistor R3, and the other end is grounded. After the power is turned on, the power indicator LED1 is always on. One end of the indicator LED2 is connected to the DC3.3V power supply circuit after connecting the resistor R6, and the other end is connected to the PA8 pin of the single-chip microcomputer. In order to be able to indicate the working status of the hydrogen inhaler through the indicator lights, a pin socket connector CN14 is used. The pin socket connector CN14 is a B3B-PH-K-S type connector, and its three ports are respectively connected to the DC3.3V power supply circuit, the PA11 and PA12 pins of the single-chip microcomputer. A red and blue dual-color LED light is connected to the pin socket connector CN14.

[0040] In order to be able to access the human-computer interaction unit, the human-computer interaction unit includes a host computer. The host computer adopts a serial port HMI design. It introduces a TTL serial port through a PZ254V-11-04P type packaged plug-in H2. Through the 2# pin and 3# pin of the TTL serial port, that is, the USART_TX pin and the USART_RX pin are respectively connected to the PA9 and PA10 pins of the single-chip microcomputer to realize the communication connection between the host computer and the single-chip microcomputer. In order to be able to supply power to the host computer, its 1# pin is connected to the DC12V power supply circuit, and the 4# pin is grounded.

[0041] The working principle of the utility model:

[0042] As Figure 16 、 Figure 17As shown, after the system is powered on, the microcontroller on the control board initializes each control hardware through the built-in program. At the same time, the power indicator LED1 is always on. After initialization, LED2 flashes at a set frequency. The microcontroller controls the host computer to enter the operation interface. In the operation interface, three working modes can be selected, namely normal, single large flow, and double person. Their corresponding working states are as follows: normal - the first water pump 4 and the first solenoid valve 6 are turned on; single large flow - the first water pump 4, the second water pump 5, and the first solenoid valve 6 are turned on; double person - the first water pump 4, the second water pump 5, the first solenoid valve 6, and the second solenoid valve 7 are all turned on.

[0043] After selecting the normal mode, hydrogen production starts. The red LED light on the outer shell is not on, and the blue LED light is on. The microcontroller drives the first water pump 4 to work through the Darlington transistor U8, and at the same time drives the first solenoid valve 6 to open, connecting the material bin 2 and the hydrogen absorption interface on the hydrogen output interface panel 3. The first water pump 4 pumps the water in the water tank 1 into the material bin 2 to contact the solid hydrolysis hydrogen production material, and hydrogen is produced by hydrolysis. The produced hydrogen flows out from the hydrogen absorption interface of the hydrogen output interface panel 3 through the first solenoid valve 6. After running for the set time, the first water pump 4 is stopped, and the first solenoid valve 6 is closed. The red LED light on the outer shell is on, and the blue LED light is turned off.

[0044] The circuit and mechanical connections involved in the present utility model are common means adopted by those skilled in the art and can obtain technical inspiration through limited experiments, belonging to common general knowledge.

[0045] The components not described in detail in this article are prior art.

[0046] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hydrogen absorption machine control circuit based on a solid hydrolysis material, characterized in that: It includes a control chip and a power supply unit. The control chip is installed on a control board and is connected to a chip power supply circuit, a hydrogen production unit water pump drive circuit, a hydrogen production unit solenoid valve drive circuit, a status indicator circuit, and a human-machine interaction unit communication interface. The power supply unit is connected to the chip power supply circuit. The hydrogen production unit water pump drive circuit and the hydrogen production unit solenoid valve drive circuit are both connected to a Darlington transistor U8. The Darlington transistor U8 is connected to the control chip. The hydrogen production unit water pump drive circuit has one or more, and each hydrogen production unit water pump drive circuit has multiple drive channels connected in parallel on the Darlington transistor U8. There is a power supply battery on the control board. The control chip is also connected to an analog signal circuit for battery voltage detection. The control chip is connected to a low-pass filter of the analog signal circuit for battery voltage detection. The low-pass filter is connected to a voltage follower circuit and then connected to the output terminal of an operational amplifier U4. The positive output terminal of the operational amplifier is connected to a voltage-dividing resistor and then connected to the battery supply voltage signal.

2. The hydrogen absorption machine control circuit based on a solid hydrolysis material according to claim 1, characterized in that: Two pins, PA2 and PA3, of the control chip are connected to the signal control pins of the hydrogen production unit water pump drive circuit. Two pins, PA5 and PA6, are connected to the signal control pins of the hydrogen production unit solenoid valve drive circuit. The PA8 pin is connected to the status indicator on the control board. Two pins, PA9 and PA10, are connected to the communication interface of the serial port HMI of the human-machine interaction unit. Two pins, PA11 and PA12, are connected to the status indicator of the control device. The ADC acquisition pin is connected to the analog signal circuit for battery voltage detection.

3. The hydrogen absorption machine control circuit based on a solid hydrolysis material according to claim 2, wherein: The power supply unit further includes a socket CN1 and an external power switch CN11. The socket CN1 is connected to the power supply battery. The 1# port of the socket CN1 is connected to the 1# port of the external power switch CN11. The 2# port of the external power switch CN11 is connected to the on-board power switch HX1. The on-board power switch HX1 is connected to the D pole of the MOS tube Q2 of the DCDC voltage conversion circuit. The G pole of the MOS tube Q2 is grounded through a resistor R53. The S pole of the MOS tube Q2 is connected to the backend DC12V power supply circuit. The DC12V power supply circuit is connected in parallel with a synchronous buck converter U9 and a capacitor C20. The capacitor C20 is grounded. The backend of the synchronous buck converter U9 is connected to a buck coil L2 and then connected to a DC5V power supply circuit. The DC5V power supply circuit is connected to a voltage regulator U2 and then connected to a buck coil L1 and a buck coil L5 and then connected to a DC3.3V power supply circuit. The front ends of the buck coil L1 and the buck coil L5 are respectively connected in parallel with a VDD-3V3 output voltage circuit and a VDD-3V3-MCU output voltage circuit. The DC3.3V power supply circuit is connected to the VBAT pin of the control chip.

4. The hydrogen absorption machine control circuit based on a solid hydrolysis material according to claim 3, characterized in that: The status indicator circuit of the control board further includes an indicator LED2. One end of the indicator LED2 is connected to the PA8 pin of the control chip, and the other end is connected to the DC3.3V power supply circuit after being connected to a resistor R6; two pins, PA11 and PA12, are respectively connected to the 2# port and 3# port of the pin connector CN14. The 1# port of the pin connector CN14 is connected to the DC3.3V power supply circuit after being connected to a resistor R11. The pin connector CN14 is connected to a bi-color LED lamp; it also includes a power indicator LED1. One end of the power indicator LED1 is grounded, and the other end is connected to the DC3.3V power supply circuit after being connected to a resistor R3.

5. The hydrogen absorption machine control circuit based on solid hydrolysis material according to claim 1 or 2, characterized in that: The front end of the positive input terminal of the operational amplifier is connected to a voltage dividing circuit including a resistor R24 and a resistor R26. The voltage dividing circuit is connected to the battery supply voltage signal at the front. In the voltage dividing circuit, a capacitor C23 is also connected in parallel with the resistor R26; a voltage follower circuit is also connected to the operational amplifier; the output terminal of the operational amplifier is connected to a low-pass filter and then to the ADC acquisition pin of the control chip. The low-pass filter includes a resistor R23 and a capacitor C22 connected in parallel. The resistor R23 is connected to the output terminal of the operational amplifier, and the capacitor C22 is connected to the analog ground; the analog ground and the digital ground are connected by a 0-ohm resistor.

6. The hydrogen absorption machine control circuit based on a solid hydrolysis material according to claim 3, characterized in that: The PA2 pin of the control chip is connected in parallel with the 3B and 4B pins of the Darlington transistor U8. The 3C and 4C pins of the Darlington transistor U8 are combined and connected to the rear-end circuit of the execution unit. The rear-end circuit of the execution unit further includes a pin connector. The 2# port of the pin connector is connected to the front-end Darlington transistor U8, and the 1# port of the pin connector is connected to the DC12V power supply circuit; a freewheeling diode and a status indicator are respectively connected in parallel to the 1# port and 2# port of the pin connector through two parallel circuits. The status indicator is connected in series with a resistor; the pin connector is electrically connected to a water pump.

7. The hydrogen absorption machine control circuit based on a solid hydrolysis material according to claim 6, characterized in that: The PA5 pin of the control chip is connected to the 1B pin of the Darlington transistor U8. The 1C pin of the Darlington transistor U8 is connected to the rear-end circuit of the execution unit. The pin connector of the rear-end circuit of the execution unit is electrically connected to a solenoid valve.

8. The hydrogen absorption machine control circuit based on a solid hydrolysis material according to claim 1, characterized in that: The human-computer interaction unit includes a host computer. The host computer has a TTL serial port. The 1# port of the TTL serial port is connected to the DC12V power supply circuit, the 2# port is connected to the PA9 pin of the control chip, the 3# port is connected to the PA10 pin of the control chip, and the 4# port is grounded.

Images