Ignition device for humidity test

Abstract

The utility model belongs to the field of humidity test, and relates to a humidity test ignition device, which comprises an MCU (Microprogrammed Control Unit) control circuit, and a charging management circuit, a nixie tube display circuit, an arc driving circuit and a probe humidity test sensor circuit which are electrically connected with the MCU control circuit, the charging management circuit is used for monitoring the electric quantity and the charging state of a battery in real time, the nixie tube display circuit is used for receiving humidity data and displaying the humidity data in an intuitive digital form through a nixie tube, and the arc driving circuit is used for receiving an ignition instruction from the MCU control circuit and generating a high-voltage arc by driving a high-voltage generator. The humidity test is high in real-time performance, safe and reliable, and can be widely applied to the fields of fire safety, electrical equipment safety, material weather resistance test and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of humidity testing, and more specifically to a humidity testing ignition device. Background Art

[0002] The humidity test ignition device is a professional device used to simulate or actually measure the humidity in the environment under specific environmental conditions to test whether related equipment or materials will cause ignition under specific humidity conditions.

[0003] However, the humidity test ignition device in the prior art still has some defects, mainly including poor real-time performance: in a rapidly changing humidity environment, the data collection and transmission speed of some devices are slow and cannot reflect environmental changes in real time, resulting in a certain lag in the test results, making it difficult to discover and solve potential safety problems in a timely manner. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the utility model provides a humidity test ignition device, comprising:

[0005] An MCU control circuit, and a charging management circuit, a digital tube display circuit, an arc drive circuit and a probe humidity test sensor circuit electrically connected to the MCU control circuit, wherein the MCU control circuit is used to receive data from the probe humidity test sensor circuit, control the charging management circuit, the digital tube display circuit, the arc drive circuit and the probe humidity test sensor circuit, the charging management circuit is used to monitor the battery power and charging status in real time, the digital tube display circuit is used to receive humidity data from the MCU control circuit and display it in an intuitive digital form through the digital tube, the arc drive circuit is used to receive an ignition instruction from the MCU control circuit, and generate a high-voltage arc by driving a high-voltage generator, and the probe humidity test sensor circuit is used to measure the ambient humidity.

[0006] Preferably, the MCU control circuit includes: pin 3 of the microcontroller M1 is connected to one end of the humidity measuring switch J2, the other end of the humidity measuring switch J2 is grounded, pin 2 of the microcontroller M1 is connected to one end of the ignition switch J1, the other end of the ignition switch J1 is grounded, and pin 20 of the microcontroller M1 is connected to one end of the capacitor C9, and the other end of the capacitor C9 is grounded.

[0007] Preferably, the charging management circuit comprises: a charging circuit and a USB interface circuit.

[0008] Preferably, the digital tube display circuit comprises: a digital tube display chip.

[0009] Preferably, the arc driving circuit includes: a gate G of the MOS tube Q1 is respectively connected to one end of the resistor R1 and one end of the resistor R10, a source S of the MOS tube Q1 is connected to the other end of the resistor R10 and is grounded, a drain D of the MOS tube Q1 is connected to pin 2 of the high-voltage package T1, a pin 1 of the high-voltage package T1 is connected to one end of the capacitor C3, and the other end of the capacitor C3 is grounded.

[0010] Preferably, the probe humidity test sensor circuit includes: the positive electrode of the metal probe is respectively connected to one end of resistor R19, one end of resistor R22, and one end of capacitor C5, the other end of capacitor C5 is connected to one end of capacitor C8 and grounded, the other end of capacitor C8 is respectively connected to the negative electrode of the metal probe and one end of resistor R25, the other end of resistor R25 is respectively connected to one end of resistor R26 and the in-phase input end of amplifier U3, the inverting input end of amplifier U3 is respectively connected to the other end of resistor R22 and one end of resistor R18, the other end of resistor R18 is respectively connected to the output end of amplifier U3 and one end of resistor R23, the other end of resistor R23 is connected to one end of capacitor C6, and the other end of capacitor C6 is grounded.

[0011] Preferably, the charging circuit includes: pin 3 of the integrated linear charger chip U1 is connected to one end of the capacitor C1, the other end of the capacitor C1 is grounded, pin 4 of the integrated linear charger chip U1 is connected to one end of the capacitor C2, the other end of the capacitor C2 is grounded, and pin 6 of the integrated linear charger chip U1 is connected to one end of the resistor R13, and the other end of the resistor R13 is grounded.

[0012] Preferably, the USB interface circuit includes: pin 1 of TYPE-C USB1 is grounded, pin 3 of TYPE-C USB1 is connected to one end of resistor R11, the other end of resistor R11 is grounded, pin 4 of TYPE-C USB1 is connected to one end of resistor R12, the other end of resistor R12 is grounded, and pin 6 of TYPE-C USB1 is grounded.

[0013] Preferably, the integrated linear charger chip U1 is SD4054.

[0014] The implementation of the humidity test ignition device of the utility model has the following beneficial effects: by integrating the MCU control circuit, the charging management circuit, the digital tube display circuit, the arc drive circuit and the probe humidity test sensor circuit, etc., accurate measurement of the ambient humidity and ignition operation are achieved; the humidity test is highly real-time, safe and reliable, and can be widely used in the fields of fire safety, electrical equipment safety and material weather resistance testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. The utility model will be further described below in combination with the drawings and embodiments. In the drawings:

[0016] Figure 1 This is a schematic diagram of the components of the humidity test ignition device of the utility model;

[0017] Figure 2 This is the circuit diagram of the MCU control circuit in the humidity test ignition device of the utility model;

[0018] Figure 3 It is a circuit diagram of a charging circuit in a charging management circuit in a humidity test ignition device of the utility model;

[0019] Figure 4 It is a circuit diagram of a USB interface circuit in a charging management circuit in a humidity test ignition device of the utility model;

[0020] Figure 5 It is the circuit diagram of the digital tube display circuit in the humidity test ignition device of the utility model;

[0021] Figure 6 It is the circuit diagram of the arc driving circuit in the humidity test ignition device of the utility model;

[0022] Figure 7 It is a circuit diagram of a probe humidity circuit in a probe humidity test sensor circuit in a humidity test ignition device of the utility model;

[0023] Figure 8 The utility model discloses a filter circuit diagram in a probe humidity test sensor circuit in a humidity test ignition device. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0027] See also Figure 1 , is a schematic diagram of the components of the humidity test ignition device of the utility model. Figure 1 As shown, in the humidity test ignition device provided in the first embodiment of the utility model, at least includes an MCU control circuit, and a charging management circuit, a digital tube display circuit, an arc drive circuit and a probe humidity test sensor circuit electrically connected to the MCU control circuit. The MCU control circuit is used to receive data from the probe humidity test sensor circuit, control the charging management circuit, the digital tube display circuit, the arc drive circuit and the probe humidity test sensor circuit, the charging management circuit is used to monitor the battery power and charging status in real time, the digital tube display circuit is used to receive humidity data from the MCU control circuit, and display it in an intuitive digital form through the digital tube, the arc drive circuit is used to receive an ignition instruction from the MCU control circuit, and generate a high-voltage arc by driving the high-voltage generator, and the probe humidity test sensor circuit is used to measure the ambient humidity.

[0028] If fuel is provided in the lighter, the fuel can be ignited by driving the high-voltage arc generated by the high-voltage generator.

[0029] Figure 2 This is the circuit diagram of the MCU control circuit in the humidity test ignition device of the utility model. Figure 2 As shown, the MCU control circuit includes: pin 3 of the microcontroller M1 is connected to one end of the humidity measuring switch J2, the other end of the humidity measuring switch J2 is grounded, pin 2 of the microcontroller M1 is connected to one end of the ignition switch J1, the other end of the ignition switch J1 is grounded, and pin 20 of the microcontroller M1 is connected to one end of the capacitor C9, and the other end of the capacitor C9 is grounded.

[0030] In the specific implementation, the microcontroller M1 is selected as PIC16F737. PIC16F737 is an 8-bit microcontroller (MCU) produced by Microchip. It is based on the reduced instruction set computer (RISC) architecture and has the characteristics of high performance and low power consumption. This chip occupies an important position in embedded system design with its high reliability and wide range of function sets.

[0031] The MCU control circuit collects, processes and outputs external signals through internal integrated processors, memory and I / O interfaces. The sensor converts the collected humidity signal into an electrical signal and inputs it into the MCU through the I / O interface. The MCU analyzes, compares and judges the received signal, and sends control instructions to other modules according to the preset threshold or conditions. For example, when the ambient humidity is detected to be lower than the set value, the MCU will activate the arc drive circuit and trigger the ignition operation.

[0032] The features of PIC16F737 are:

[0033] First, high-speed processing capability: Its maximum clock frequency can reach 20MHz, ensuring fast data processing and execution efficiency. Most instructions are single-cycle instructions, except for program jump instructions, making program execution extremely fast.

[0034] Second, rich storage resources: with up to 8K x 14 words of ROM program memory and 368 x 8 bytes of data memory, it provides ample storage space for complex applications.

[0035] Third, analog and digital functions: built-in 8-bit analog-to-digital converter (ADC) with up to 8 channels and a resolution of 10 bits, suitable for various analog signal acquisition and processing scenarios. At the same time, it provides two capture, comparison and PWM (pulse width modulation) modules to support complex motor control and signal generation.

[0036] Fourth, it has a communication interface: integrated synchronous serial ports such as SPI (master mode), I2C (slave mode) and USART (Universal Synchronous Asynchronous Receiver / Transmitter) to facilitate data transmission with external devices or sensors.

[0037] Figure 3 It is a circuit diagram of a charging circuit in a charging management circuit in a humidity test ignition device of the utility model; Figure 4 This is the circuit diagram of the USB interface circuit in the charging management circuit of the humidity test ignition device of the utility model. Figure 3 , Figure 4As shown, the charging management circuit includes: a charging circuit and a USB interface circuit. The charging circuit includes: pin 3 of the integrated linear charger chip U1 is connected to one end of the capacitor C1, the other end of the capacitor C1 is grounded, pin 4 of the integrated linear charger chip U1 is connected to one end of the capacitor C2, the other end of the capacitor C2 is grounded, pin 6 of the integrated linear charger chip U1 is connected to one end of the resistor R13, and the other end of the resistor R13 is grounded.

[0038] The USB interface circuit includes: pin 1 of TYPE-C USB1 is grounded, pin 3 of TYPE-C USB1 is connected to one end of resistor R11, the other end of resistor R11 is grounded, pin 4 of TYPE-C USB1 is connected to one end of resistor R12, the other end of resistor R12 is grounded, and pin 6 of TYPE-C USB1 is grounded.

[0039] In specific implementation, the integrated linear charger chip U1 can be selected as SD4054. SD4054 is an integrated linear charger chip designed for single-cell lithium-ion batteries. It has constant current / constant voltage charging characteristics and is an ideal choice for small portable devices. The chip integrates multiple advanced functions to meet the charging needs of modern electronic products.

[0040] The main functions of SD4054 include: First, it supports both constant current and constant voltage charging modes, and can automatically adjust the charging current and voltage to ensure that the battery is charged quickly and safely. Second, the chip is designed to meet USB power specifications and does not require external sensing resistors or blocking diodes, which simplifies circuit design and reduces costs. In addition, SD4054 also has an intelligent thermal feedback control function that can automatically adjust the charging current under high power operation or high ambient humidity to prevent overheating risks.

[0041] During the charging process, the SD4054 can automatically monitor the charging current and battery voltage. When the charging current drops to 1 / 10 of the preset value, the charging cycle is automatically terminated to prevent the battery from overcharging. At the same time, when the input power (such as a wall adapter or USB power supply) is removed, the SD4054 automatically enters a low current state to reduce battery leakage current and extend battery life. In addition, the chip also supports a shutdown mode that reduces the power supply current to 25μA to further save energy.

[0042] The charging management circuit is responsible for providing safe and efficient charging services for the battery or other energy storage elements inside the device. It can effectively control parameters such as current, voltage and humidity during the charging process to ensure that the battery is in the best charging state, extend the battery life, and prevent safety issues such as overcharging and over-discharging. When the external power supply is connected, the charging control module first detects the battery voltage and current status, and then adjusts the charging parameters according to the preset charging strategy (such as constant current charging, constant voltage charging, etc.). At the same time, the battery protection module monitors battery humidity, voltage, current and other parameters in real time. Once an abnormal situation (such as overcharging, over-discharging, short circuit, etc.) is detected, the charging circuit is immediately cut off to protect the battery safety. The status indicator part feedbacks the charging status to the user through LED lights or display screens.

[0043] Figure 5 This is the circuit diagram of the digital tube display circuit in the humidity test ignition device of the utility model. Figure 5 As shown, the digital tube display circuit includes: a digital tube display chip.

[0044] When the humidity measuring switch J2 is pressed, the MCU will calculate the humidity of the environment at that time and the test humidity of the probe, and send a data signal to the digital tube for display.

[0045] The digital tube display circuit is used to display the working status of the device, environmental humidity and other key information in real time. It provides clear visual feedback to the user in the form of intuitive numbers or characters, making it easier for the user to understand the operating status and environmental status of the device.

[0046] The digital tube display circuit can be composed of a digital tube, a driver chip, and a display control logic. The driver chip drives the LED lamp on the digital tube to emit light according to the display data and control signals sent by the MCU to form the required numbers or characters. The display control logic is responsible for converting data such as environmental humidity into a display format recognizable by the digital tube, and controlling parameters such as the update frequency and brightness of the display content. Users can quickly understand the working status and environmental conditions of the device by observing the display content on the digital tube.

[0047] Figure 6 This is the circuit diagram of the arc driving circuit in the humidity test ignition device of the utility model. Figure 6 As shown, the arc driving circuit includes: a gate G of the MOS tube Q1 is connected to one end of the resistor R1 and one end of the resistor R10 respectively, a source S of the MOS tube Q1 is connected to the other end of the resistor R10 and is grounded, a drain D of the MOS tube Q1 is connected to a pin 2 of the high-voltage package T1, a pin 1 of the high-voltage package T1 is connected to one end of the capacitor C3, and the other end of the capacitor C3 is grounded.

[0048] When the ignition switch J1 is pressed, the level turns to low level. When the MCU detects that the second pin is at a low level, it will send a driving signal with a driving frequency of 18KHZ and a duty cycle of 60% to the 28th pin, and output it to the first pin of the MOS tube. At this time, the high-voltage package T1 ignites.

[0049] The arc drive circuit is a key component to realize the ignition function. According to the control instructions of the MCU, it generates sufficient voltage and current to drive the arc between the electrodes to realize the ignition operation. The stability and reliability of the arc drive circuit directly affect the ignition effect and equipment safety.

[0050] The arc drive circuit uses a high-voltage transformer or pulse generator to generate high voltage and current. When the MCU issues an ignition command, the arc drive circuit responds quickly, converts the low-voltage, low-current signal into a high-voltage, high-current signal, and applies it to the electrode. Under the action of the strong electric field formed between the electrodes, the air molecules are ionized to form a plasma channel (i.e., an arc), thereby realizing the ignition operation. The arc drive circuit also needs to have safety measures such as overcurrent protection and short-circuit protection to ensure that the power supply can be quickly cut off under abnormal circumstances to prevent equipment damage or safety accidents.

[0051] Figure 7 This is the circuit diagram of the probe humidity circuit in the probe humidity test sensor circuit in the humidity test ignition device of the utility model. Figure 7 As shown, the probe humidity test sensor circuit includes: the positive electrode of the metal probe is respectively connected to one end of the resistor R19, one end of the resistor R22, and one end of the capacitor C5, the other end of the capacitor C5 is connected to one end of the capacitor C8 and grounded, the other end of the capacitor C8 is respectively connected to the negative electrode of the metal probe and one end of the resistor R25, the other end of the resistor R25 is respectively connected to one end of the resistor R26 and the in-phase input end of the amplifier U3, the inverting input end of the amplifier U3 is respectively connected to the other end of the resistor R22 and one end of the resistor R18, the other end of the resistor R18 is respectively connected to the output end of the amplifier U3 and one end of the resistor R23, the other end of the resistor R23 is connected to one end of the capacitor C6, and the other end of the capacitor C6 is grounded.

[0052] The probe humidity test sensor circuit is used to accurately measure the ambient humidity. It realizes real-time monitoring of the ambient humidity by converting humidity changes into changes in electrical signals. The probe humidity test sensor has the advantages of fast response speed, high measurement accuracy and good stability, and is widely used in various occasions that require humidity control.

[0053] Probe humidity test sensors usually use resistive or capacitive principles to measure humidity. Taking a resistive humidity sensor as an example, it contains a layer of hygroscopic material (such as polymer electrolyte, etc.). When the ambient humidity changes, the amount of water absorbed by the hygroscopic material will also change, causing the resistance value of the material to change. The sensor circuit measures the change in resistance value and converts it into a voltage or current signal and outputs it to the MCU for processing. Capacitive humidity sensors use the relationship between dielectric capacitance and ambient humidity for measurement. Their working principle is similar to that of resistive humidity sensors, except that the change in resistance value is converted into a change in capacitance value for output.

[0054] Figure 8 This is a filter circuit diagram in the probe humidity test sensor circuit in the humidity test ignition device of the utility model. Figure 8 As shown, one end of the resistor R20 is connected to one end of the resistor R21, one end of the resistor R24, and one end of the capacitor C7, respectively, and the other end of the resistor R24 ​​is connected to the other end of the capacitor C7 and is grounded.

[0055] The probe humidity test sensor circuit is used to measure the humidity parameters of the environment. It realizes comprehensive monitoring of environmental humidity by converting the change of humidity into the change of electrical signal. The probe humidity test sensor has the characteristics of wide measurement range, high accuracy and good stability, and is an indispensable and important component in the humidity control system.

[0056] The probe humidity sensor can be measured using components such as thermistors (such as PTC or NTC), and its resistance value changes with the change of humidity. The humidity sensor uses the resistive or capacitive principle for measurement, as mentioned above. The sensor circuit measures the change of these two parameters and converts them into voltage or current signals and outputs them to the MCU for processing. The MCU analyzes and calculates the received signals to obtain the actual humidity and humidity value of the environment, and displays them through the digital tube display circuit or controls the operation of other functional modules.

[0057] The working principle of the humidity test ignition device of the utility model is:

[0058] When the probe is inserted into the test body, its conductive properties will change due to different humidity. This is reflected in the electrical data as follows: the measured resistance value will change slightly due to different humidity. This weak signal will be amplified by the operational amplifier (U3) to generate an analog voltage, which will also change accordingly. The output end of the voltage signal is (ADC-IN0), which is input to the 21st pin of the chip of the MCU control circuit. The MCU will correspond to the different humidity according to the different voltages.

[0059] The resistance method uses a resistance sensor to measure the moisture content in the air. The resistance sensor usually contains two metal electrodes. When the moisture content in the air increases, the moisture molecules form a conductive path between the electrodes, changing the resistance value. By measuring the change in resistance value, the humidity level can be determined.

[0060] Use a standard humidity tester as a calibration basis to measure the resistance value corresponding to each humidity, so that the resistance value corresponds to the humidity value one by one. When the probe is inserted into the object to be measured, the humidity is determined by detecting the change in resistance between the two electrodes.

[0061] Through the design of the above embodiments, the utility model has the beneficial effects of: by integrating the MCU control circuit, the charging management circuit, the digital tube display circuit, the arc drive circuit and the probe humidity test sensor circuit, etc., accurate measurement and ignition operation of the ambient humidity are achieved; the humidity test is highly real-time, safe and reliable, and can be widely used in the fields of fire safety, electrical equipment safety and material weather resistance testing.

[0062] The present invention is described according to specific embodiments, but those skilled in the art should understand that various changes and equivalent substitutions can be made without departing from the scope of the present invention. In addition, in order to adapt to specific occasions of the present invention technology, many modifications can be made to the present invention without departing from its protection scope. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all embodiments that fall within the scope of protection of the claims.

Claims

1. A humidity test ignition device, characterized in that: include: An MCU control circuit, and a charging management circuit, a digital tube display circuit, an arc drive circuit and a probe humidity test sensor circuit electrically connected to the MCU control circuit, wherein the MCU control circuit is used to receive data from the probe humidity test sensor circuit, control the charging management circuit, the digital tube display circuit, the arc drive circuit and the probe humidity test sensor circuit, the charging management circuit is used to monitor the battery power and charging status in real time, the digital tube display circuit is used to receive humidity data from the MCU control circuit and display it in an intuitive digital form through the digital tube, the arc drive circuit is used to receive an ignition instruction from the MCU control circuit, and generate a high-voltage arc by driving a high-voltage generator, and the probe humidity test sensor circuit is used to measure the ambient humidity.

2. The humidity test ignition device according to claim 1, characterized in that: The MCU control circuit includes: pin 3 of the microcontroller M1 is connected to one end of the humidity measuring switch J2, the other end of the humidity measuring switch J2 is grounded, pin 2 of the microcontroller M1 is connected to one end of the ignition switch J1, the other end of the ignition switch J1 is grounded, and pin 20 of the microcontroller M1 is connected to one end of the capacitor C9, and the other end of the capacitor C9 is grounded.

3. The humidity test ignition device according to claim 1, characterized in that: The charging management circuit includes: a charging circuit and a USB interface circuit.

4. The humidity test ignition device according to claim 1, characterized in that: The digital tube display circuit comprises: a digital tube display chip.

5. The humidity test ignition device according to claim 1, characterized in that: The arc driving circuit includes: a gate G of the MOS tube Q1 is connected to one end of the resistor R1 and one end of the resistor R10 respectively, a source S of the MOS tube Q1 is connected to the other end of the resistor R10 and is grounded, a drain D of the MOS tube Q1 is connected to a pin 2 of the high-voltage package T1, a pin 1 of the high-voltage package T1 is connected to one end of the capacitor C3, and the other end of the capacitor C3 is grounded.

6. The humidity test ignition device according to claim 1, characterized in that: The probe humidity test sensor circuit includes: the positive electrode of the metal probe is respectively connected to one end of a resistor R19, one end of a resistor R22, and one end of a capacitor C5; the other end of the capacitor C5 is respectively connected to one end of a capacitor C8 and is grounded; the other end of the capacitor C8 is respectively connected to the negative electrode of the metal probe and one end of a resistor R25; the other end of the resistor R25 is respectively connected to one end of a resistor R26 and the in-phase input end of an amplifier U3; the inverting input end of the amplifier U3 is respectively connected to the other end of the resistor R22 and one end of the resistor R18; the other end of the resistor R18 is respectively connected to the output end of the amplifier U3 and one end of a resistor R23; the other end of the resistor R23 is connected to one end of a capacitor C6; and the other end of the capacitor C6 is grounded.

7. The humidity test ignition device according to claim 3, characterized in that: The charging circuit includes: pin 3 of the integrated linear charger chip U1 is connected to one end of the capacitor C1, the other end of the capacitor C1 is grounded, pin 4 of the integrated linear charger chip U1 is connected to one end of the capacitor C2, the other end of the capacitor C2 is grounded, and pin 6 of the integrated linear charger chip U1 is connected to one end of the resistor R13, and the other end of the resistor R13 is grounded.

8. The humidity test ignition device according to claim 3, characterized in that: The USB interface circuit includes: pin 1 of TYPE-C USB1 is grounded, pin 3 of TYPE-C USB1 is connected to one end of resistor R11, the other end of resistor R11 is grounded, pin 4 of TYPE-C USB1 is connected to one end of resistor R12, the other end of resistor R12 is grounded, and pin 6 of TYPE-C USB1 is grounded.

9. The humidity test ignition device according to claim 7, characterized in that: The integrated linear charger chip U1 is SD4054.

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