Hydrogen purity detection method, device and equipment and storage medium

Abstract

The embodiment of the invention provides a hydrogen purity detection method and device, equipment and a storage medium. Comprising the steps that sample gas and to-be-detected hydrogen are obtained, a Wheatstone bridge circuit is constructed based on the sample gas and the to-be-detected hydrogen, and the circuit comprises two fixed resistors and two thermistors; applying heat to the thermistor, and obtaining a resistance change value of the thermistor and a circuit output end detection value; and detecting the purity of the to-be-detected hydrogen according to the resistance change value and the detection value. The hydrogen purity is detected by constructing the Wheatstone bridge circuit and utilizing the thermal response difference of the thermistor to the sample gas and the hydrogen to be detected, and tiny resistance change can be captured, so that the detection precision and accuracy are improved. Based on a stable circuit principle and accurate resistance measurement, interference of external factors is reduced, and a detection result is more reliable. A resistance change value and a circuit output end detection value can be rapidly obtained, real-time detection of the purity of hydrogen to be detected is achieved, and a detection result is provided in time.

Description

Technical Field

[0001] The present invention relates to the field of gas measurement technology, and in particular to a hydrogen purity detection method, device, equipment and storage medium. Background Art

[0002] With the rapid development of the energy sector, hydrogen, as a clean and efficient energy carrier, is increasingly used in a wide range of applications, including fuel cells, chemical production, energy storage, etc. In these applications, the purity of hydrogen is a crucial parameter.

[0003] Traditional hydrogen purity testing methods have many shortcomings. For example, some methods are complicated to operate, require professional technicians to operate, and the testing process is time-consuming and cannot provide accurate purity results in a timely manner. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems of long detection time and poor accuracy in the prior art solutions, and to provide a hydrogen purity detection method, device, equipment and storage medium, which can realize rapid detection of hydrogen purity by constructing a bridge circuit structure.

[0005] In a first aspect, an embodiment of the present disclosure provides a method for detecting hydrogen purity, the method comprising: Obtaining a sample gas and a hydrogen gas to be tested, and constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be tested, wherein the circuit includes two fixed resistors and two thermistors; Applying heat to the thermistor and obtaining a resistance change value of the thermistor and a detection value at a circuit output end; The purity of the hydrogen to be tested is detected based on the resistance change value and the detection value.

[0006] Optionally, a Wheatstone bridge circuit is constructed based on the sample gas and the hydrogen to be tested, including: building an initial bridge, setting a first fixed resistor and a second fixed resistor according to the equilibrium state of the initial bridge; obtaining the thermal conductivity of the gas, and determining the resistance sensitivity according to the thermal conductivity of the gas; obtaining a first thermistor and a second thermistor according to the resistance sensitivity; placing the first thermistor in a first gas compartment and the second thermistor in a second gas compartment to generate a Wheatstone bridge circuit.

[0007] Optionally, after constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be tested, the method further includes: introducing the sample gas into the first gas chamber and determining the gas flow rate, wherein the sample gas is hydrogen gas of standard concentration; and introducing the hydrogen gas to be tested into the second gas chamber based on the gas flow rate.

[0008] Optionally, applying heat to the thermistor includes: obtaining a preset heating temperature and heating time; and applying heat to the thermistor according to the heating temperature and heating time.

[0009] Optionally, obtaining the resistance change value of the thermistor and the detection value of the circuit output end includes: obtaining a first change value of the first thermistor and a second change value of the second thermistor, and using the first change value and the second change value as the resistance change value; detecting the voltage change value and the current value of the circuit output end, and using the voltage change value and the current value as the detection values.

[0010] Optionally, the purity of the hydrogen to be tested is detected based on the resistance change value and the detection value, including: determining the change difference between the first change value and the second change value; judging whether the change difference is greater than a preset difference, and if so, determining that the purity of the hydrogen to be tested is unqualified; otherwise, performing a purity test on the hydrogen to be tested based on the detection value.

[0011] Optionally, the purity of the hydrogen to be tested is detected based on the resistance change value and the detection value, including: judging whether the detection value is greater than the corresponding preset threshold value; if so, determining that the purity of the hydrogen to be tested is unqualified; otherwise, determining that the purity of the hydrogen to be tested is qualified.

[0012] In a second aspect, the present disclosure also provides a hydrogen purity detection device, the device comprising: A gas acquisition and circuit construction module, used for acquiring sample gas and hydrogen gas to be tested, and constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be tested, wherein the circuit includes two fixed resistors and two thermistors; A resistance heating module, used for applying heat to the thermistor and obtaining a resistance change value of the thermistor and a detection value of a circuit output end; The hydrogen purity detection module is used to detect the purity of the hydrogen to be tested based on the resistance change value and the detection value.

[0013] In a third aspect, an embodiment of the present disclosure further provides an electronic device, the electronic device comprising: at least one processor; and a memory communicatively connected to at least one processor; wherein, When the memory stores a computer program executable by at least one processor, the computer program is executed by at least one processor so that the at least one processor can execute a hydrogen purity detection method as described in any embodiment of the present disclosure.

[0014] In a fourth aspect, an embodiment of the present disclosure provides a computer storage medium on which a computer program is stored, and when the program is executed by a processor, a hydrogen purity detection method as in any embodiment of the present disclosure is implemented.

[0015] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description.

[0016] Therefore, the present invention has the following beneficial effects: 1. By constructing a Wheatstone bridge circuit and using the difference in thermal response of thermistors to the sample gas and the hydrogen to be tested to detect the purity of hydrogen, it is possible to more sensitively capture tiny resistance changes, thereby improving the precision and accuracy of detection.

[0017] 2. Based on stable circuit principles and precise resistance measurement, it reduces interference from external factors and makes the test results more reliable and repeatable.

[0018] 3. It can quickly obtain the resistance change value and the circuit output detection value, realize real-time detection of the purity of the hydrogen to be tested, and provide the test results in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a flow chart of a hydrogen purity detection method provided according to Embodiment 1 of the present invention; Figure 2 is a structural schematic diagram of a hydrogen purity detection device provided according to Embodiment 2 of the present invention; Figure 3 It is a structural schematic diagram of an electronic device provided according to Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] Embodiment 1 Figure 1 A flowchart of a hydrogen purity detection method is provided for the first embodiment of the present invention. This embodiment is applicable to the case of detecting the purity of hydrogen. The method can be executed by a hydrogen purity detection device provided by an embodiment of the present disclosure. The device can be implemented in software and / or hardware and can generally be integrated in a computer device. The method of the embodiment of the present disclosure specifically includes: S110: Obtaining a sample gas and a hydrogen gas to be tested, and constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be tested, wherein the circuit includes two fixed resistors and two thermistors.

[0024] Among them, the sample gas refers to hydrogen with known composition and purity, which is used as a reference standard to compare with the hydrogen to be tested. The purpose of setting the sample gas is to establish a benchmark so that the purity of the hydrogen to be tested can be judged by the difference under the same detection conditions with the hydrogen to be tested. The hydrogen to be tested refers to a hydrogen sample whose purity needs to be determined. Its purity is unknown, and its purity indicators such as hydrogen concentration are determined by specific detection methods and comparison with the sample gas. The Wheatstone bridge circuit refers to a circuit used to accurately measure resistance. It consists of four resistors, including two fixed resistors and two thermistors in this application. When the bridge is balanced, the current on the diagonal is zero, that is, the voltages of the two branches are equal. The purity of the hydrogen to be tested is determined by measuring the change in resistance, which takes advantage of the different effects of hydrogen of different purities on the thermistors, causing the bridge to lose balance and produce a measurable output. In the Wheatstone bridge circuit, the resistance value of the fixed resistor is fixed. Their function is to form a bridge circuit together with thermistors. By adjusting the value of the fixed resistor, the bridge can be made as close to equilibrium as possible in the absence of the hydrogen to be measured and the sample gas, so that the resistance change caused by the gas change can be more accurately detected in subsequent measurements. A thermistor refers to a temperature-sensitive resistor element, and the resistance value changes significantly with changes in temperature. In the technical solution of an embodiment of the present invention, the temperature change of the thermistor is caused by the thermal conductivity of the hydrogen to be measured and the sample gas and the application of heat. Hydrogen of different purities will cause different temperatures around the thermistor, thereby causing a change in resistance value. This change can be used to determine the purity of the hydrogen to be measured.

[0025] Optionally, a Wheatstone bridge circuit is constructed based on the sample gas and the hydrogen to be tested, including: building an initial bridge, setting a first fixed resistor and a second fixed resistor according to the equilibrium state of the initial bridge; obtaining the thermal conductivity of the gas, and determining the resistance sensitivity according to the thermal conductivity of the gas; obtaining a first thermistor and a second thermistor according to the resistance sensitivity; placing the first thermistor in a first gas compartment and the second thermistor in a second gas compartment to generate a Wheatstone bridge circuit.

[0026] Among them, the Wheatstone bridge is a circuit composed of four resistors. When the four resistors satisfy a certain relationship, the bridge is in a balanced state, and no current flows through the diagonal line. When building the initial bridge, it is necessary to select a suitable resistance value to approach the equilibrium state. The first fixed resistor and the second fixed resistor are set according to the equilibrium state of the initial bridge, that is, when the potential at both ends of the bridge is equal, the current passing through the bridge is zero. By adjusting the value of the fixed resistor, the bridge can be as close to the equilibrium state as possible in the absence of the hydrogen to be measured and the sample gas, so that the resistance change caused by the gas change can be more accurately detected in subsequent measurements.

[0027] It should be noted that since different gases have different thermal conductivities, the thermal conductivity will affect the temperature change of the thermistor. When the thermal conductivity of the gas is high, the heat around the thermistor is more easily taken away, resulting in a larger temperature change of the thermistor. Resistance sensitivity refers to the relationship between the resistance change and temperature change of the thermistor. By obtaining the thermal conductivity of the gas, the resistance sensitivity can be determined based on the known thermistor characteristics and the effect of gas thermal conductivity on temperature.

[0028] Specifically, obtaining the first thermistor and the second thermistor according to the resistance sensitivity is to ensure that the thermistors can produce a sufficiently obvious resistance change in a specific gas environment. The first thermistor is placed in the first gas chamber, and the second thermistor is placed in the second gas chamber. At this time, the two thermistors can be placed in different gas environments. When the hydrogen gas to be measured and the sample gas enter the gas chamber, due to the differences in thermal conductivity and other properties of different gases, the temperatures of the two thermistors will change to varying degrees, thereby causing changes in resistance values. At this time, the two thermistors and the two fixed resistors together form a Wheatstone bridge circuit. When the bridge is unbalanced, a detection value related to the resistance change will be generated at the output end. By analyzing this detection value, the properties of the hydrogen gas to be measured, such as purity, can be inferred.

[0029] Optionally, after constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be tested, the method further includes: introducing the sample gas into the first gas chamber and determining the gas flow rate, wherein the sample gas is hydrogen gas of standard concentration; and introducing the hydrogen gas to be tested into the second gas chamber based on the gas flow rate.

[0030] The purpose of introducing the sample gas (standard concentration hydrogen) into the first gas chamber is to establish a known reference state. The gas flow rate can be calculated by measuring the pressure difference, heat change and other physical quantities generated when the gas flows through a specific channel. Then, the hydrogen gas to be tested can be introduced into the second gas chamber based on the gas flow rate, so that the environment of the two thermistors in the Wheatstone bridge circuit of the hydrogen gas to be tested and the sample gas is as similar as possible, so as to more accurately compare their effects on the thermistors. By controlling the flow rate of the hydrogen gas to be tested to correspond to the flow rate of the sample gas, it can be ensured that the gas flow states in the two gas chambers are similar within the same time, thereby reducing the measurement error caused by the flow difference. For example, a flow control valve can be used to adjust the flow rate of the hydrogen gas to be tested so that it maintains a certain proportional relationship with the flow rate of the sample gas. In this way, when the two thermistors are affected by different gases respectively, the unbalanced state of the bridge can more accurately reflect the difference between the hydrogen gas to be tested and the standard concentration hydrogen gas, and then be used for purity detection and other analyses of the hydrogen gas to be tested.

[0031] S120: applying heat to the thermistor, and obtaining a resistance change value of the thermistor and a detection value of a circuit output terminal.

[0032] Optionally, applying heat to the thermistor includes: obtaining a preset heating temperature and heating time; and applying heat to the thermistor according to the heating temperature and heating time.

[0033] The determination of the heating time requires consideration of multiple factors. On the one hand, it is necessary to ensure that the thermistor has enough time to reach a stable temperature state so that its resistance change can be accurately measured. On the other hand, the heating time cannot be too long to avoid causing other unnecessary changes, such as aging of the thermistor and intensified chemical reactions of the gas. Usually, the appropriate heating time can be determined by combining theoretical calculations and experimental tests. For example, based on the heat conduction equation and the heat capacity of the thermistor, the time required to reach a specific temperature can be estimated.

[0034] Specifically, a heating element such as a resistance wire, a heating sheet, etc. can be used to heat the thermistor. By controlling the current or power of the heating element, the heating temperature can be adjusted. For example, a constant current source is used to power a resistance wire. According to Ohm's law, when current passes through the resistance wire, heat is generated. The heating temperature can be controlled by adjusting the current.

[0035] At the same time, in order to ensure that the heating is performed according to the preset heating time, a timer or a time control circuit can be used. When the heating starts, the timer starts, and after the preset heating time has passed, the heating power supply is automatically cut off to stop heating.

[0036] During the heating process, the uniform distribution of heat also needs to be considered to ensure that all parts of the thermistor are heated to the same degree. Appropriate heat dissipation design and thermal conductive materials can be used to allow heat to be evenly transferred to the thermistor. For example, a metal sheet with good thermal conductivity can be used to connect the heating element to the thermistor to improve the efficiency and uniformity of heat transfer.

[0037] Optionally, obtaining the resistance change value of the thermistor and the detection value of the circuit output end includes: obtaining a first change value of the first thermistor and a second change value of the second thermistor, and using the first change value and the second change value as the resistance change value; detecting the voltage change value and the current value of the circuit output end, and using the voltage change value and the current value as the detection values.

[0038] Specifically, when heat is applied to the thermistor, the temperature around the thermistor changes due to the different thermal conductivity of the sample gas and the hydrogen gas to be measured, thereby causing a change in the resistance value.

[0039] First, in the initial state without gas and heating, the initial resistance values ​​of the first thermistor and the second thermistor are measured, which are recorded as RA1 and RB1 respectively. Then, after the sample gas and the hydrogen gas to be tested are introduced and heat is applied according to the preset heating temperature and time, the resistance values ​​of the two thermistors are measured again, which are recorded as RA2 and RB2 respectively. The resistance change value can be determined by calculating the difference between the resistance values ​​before and after.

[0040] Furthermore, when the resistance value of the thermistor changes, the bridge loses balance and a voltage is generated at the output end. According to Ohm's law, the current in the circuit of the bridge will also change accordingly. A voltmeter can be connected to the output end of the bridge to measure the voltage at the output end. In the initial state, the initial voltage value at the output end of the bridge is recorded. After the gas is passed and heated, the voltage value at the output end is measured again to determine the voltage change value. For the detection of the current value, an ammeter can be connected in series in the circuit of the bridge to measure the current in the circuit.

[0041] S130: Perform purity detection of the hydrogen gas to be tested according to the resistance change value and the detection value.

[0042] Optionally, the purity of the hydrogen to be tested is detected based on the resistance change value and the detection value, including: determining the change difference between the first change value and the second change value; judging whether the change difference is greater than a preset difference, and if so, determining that the purity of the hydrogen to be tested is unqualified; otherwise, performing a purity test on the hydrogen to be tested based on the detection value.

[0043] Specifically, if the difference between the hydrogen to be tested and the standard concentration hydrogen is large, the difference in the resistance change values ​​of the two thermistors will be large. When the difference exceeds the preset difference, it means that the hydrogen to be tested is very different from the standard concentration hydrogen, and it can be judged that the purity is unqualified. When the change difference is not greater than the preset difference, it means that the difference between the hydrogen to be tested and the standard concentration hydrogen is within an acceptable range, but its specific purity cannot be determined. At this time, it is necessary to further analyze the purity of the hydrogen to be tested based on the detection value (voltage change value and current value) at the output end of the circuit.

[0044] Optionally, the purity of the hydrogen to be tested is detected based on the resistance change value and the detection value, including: judging whether the detection value is greater than the corresponding preset threshold value; if so, determining that the purity of the hydrogen to be tested is unqualified; otherwise, determining that the purity of the hydrogen to be tested is qualified.

[0045] Specifically, if the purity of the hydrogen to be measured is significantly different from the standard concentration, the thermistor will be greatly affected, thereby increasing the imbalance of the bridge, which is manifested as an increase in the detection value. Conversely, if the purity of the hydrogen to be measured is close to the standard concentration, the imbalance of the bridge is small, and the detection value will also be relatively small. Compare the detection value (voltage change value and current value) obtained at the output end of the circuit with the corresponding preset threshold. If the detection value is greater than the preset threshold, it means that the imbalance of the bridge is large, and the purity of the hydrogen to be measured is far from the standard concentration, and it can be judged that the purity is unqualified. If the detection value is not greater than the preset threshold, it means that the imbalance of the bridge is within an acceptable range, and the purity of the hydrogen to be measured is close to the standard concentration. It can be determined that the purity detection of the hydrogen to be measured is qualified.

[0046] The technical solution of the embodiment of the present invention can detect the purity of hydrogen by constructing a Wheatstone bridge circuit and using the difference in thermal response of thermistors to sample gas and hydrogen to be tested, so as to more sensitively capture tiny resistance changes, thereby improving the precision and accuracy of detection. Based on stable circuit principles and precise resistance measurement, the interference of external factors is reduced, making the detection results more reliable and repeatable. The resistance change value and the detection value of the circuit output end can be quickly obtained, so as to realize real-time detection of the purity of hydrogen to be tested and provide the detection results in a timely manner.

[0047] Embodiment 2 Figure 2 The following is a schematic diagram of the structure of a hydrogen purity detection device provided in the second embodiment of the present invention. The device can be implemented in software and / or hardware, and can generally be integrated into an electronic device that executes the method. Figure 2 As shown, the device includes: a gas acquisition and circuit construction module 210, which is used to acquire sample gas and hydrogen gas to be measured, and construct a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be measured, wherein the circuit includes two fixed resistors and two thermistors; The resistance heating module 220 is used to apply heat to the thermistor and obtain the resistance change value of the thermistor and the detection value of the circuit output end; The hydrogen purity detection module 230 is used to detect the purity of the hydrogen to be tested according to the resistance change value and the detection value.

[0048] Optionally, the gas acquisition and circuit construction module 210 is specifically used to: build an initial bridge, set a first fixed resistor and a second fixed resistor according to the equilibrium state of the initial bridge; obtain the thermal conductivity of the gas, and determine the resistance sensitivity according to the thermal conductivity of the gas; obtain a first thermistor and a second thermistor according to the resistance sensitivity; place the first thermistor in a first gas compartment, and place the second thermistor in a second gas compartment to generate a Wheatstone bridge circuit.

[0049] Optionally, the device also includes: a gas introduction module, which is used to introduce sample gas into the first gas chamber and determine the gas flow rate after constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be tested, wherein the sample gas is hydrogen gas of standard concentration; and introduce the hydrogen gas to be tested into the second gas chamber based on the gas flow rate.

[0050] Optionally, the resistance heating module 220 specifically includes: a resistance heating unit, which is used to: obtain a preset heating temperature and heating time; and apply heat to the thermistor according to the heating temperature and heating time.

[0051] Optionally, the resistance heating module 220 specifically includes: a value acquisition unit, used to: obtain a first change value of the first thermistor and a second change value of the second thermistor, and use the first change value and the second change value as resistance change values; detect the voltage change value and current value at the output end of the circuit, and use the voltage change value and the current value as detection values.

[0052] Optionally, the hydrogen purity detection module 230 specifically includes: a resistance change value verification unit, which is used to: determine the change difference between the first change value and the second change value; judge whether the change difference is greater than a preset difference, and if so, determine that the purity detection of the hydrogen to be tested is unqualified; otherwise, perform purity detection of the hydrogen to be tested according to the detection value.

[0053] Optionally, the hydrogen purity detection module 230 specifically includes: a detection value purity verification unit, used to: determine whether the detection value is greater than the corresponding preset threshold value, if so, determine that the purity detection of the hydrogen to be tested is unqualified; otherwise, determine that the purity detection of the hydrogen to be tested is qualified.

[0054] A hydrogen purity detection device provided in an embodiment of the present invention can execute a hydrogen purity detection method provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0055] The technical solution of the embodiment of the present invention can detect the purity of hydrogen by constructing a Wheatstone bridge circuit and using the difference in thermal response of thermistors to sample gas and hydrogen to be tested, so as to more sensitively capture tiny resistance changes, thereby improving the precision and accuracy of detection. Based on stable circuit principles and precise resistance measurement, the interference of external factors is reduced, making the detection results more reliable and repeatable. The resistance change value and the detection value of the circuit output end can be quickly obtained, so as to realize real-time detection of the purity of hydrogen to be tested and provide the detection results in a timely manner.

[0056] Embodiment 3 Figure 3A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0057] like Figure 3 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0058] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0059] The processor 11 may be a variety of general and / or dedicated processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a hydrogen purity detection method.

[0060] In some embodiments, a hydrogen purity detection method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the hydrogen purity detection method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform a hydrogen purity detection method in any other appropriate manner (e.g., by means of firmware).

[0061] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0062] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0063] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0064] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0065] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0066] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0067] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0068] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting hydrogen purity, characterized in that: include: Obtaining a sample gas and a hydrogen gas to be tested, and constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be tested, wherein the circuit includes two fixed resistors and two thermistors; Applying heat to the thermistor and obtaining a resistance change value of the thermistor and a detection value of the circuit output end; The purity of the hydrogen gas to be tested is detected according to the resistance change value and the detection value.

2. A method for detecting hydrogen purity according to claim 1, characterized in that: The step of constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be measured comprises: Building an initial electric bridge, and setting a first fixed resistor and a second fixed resistor according to a balanced state of the initial electric bridge; Obtaining the thermal conductivity of the gas, and determining the resistance sensitivity according to the thermal conductivity of the gas; Acquire a first thermistor and a second thermistor according to the resistance sensitivity; The first thermistor is placed in a first gas chamber and the second thermistor is placed in a second gas chamber to create a Wheatstone bridge circuit.

3. A method for detecting hydrogen purity according to claim 2, characterized in that: After constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be measured, the method further includes: Introducing a sample gas into the first gas chamber and determining a gas flow rate, wherein the sample gas is hydrogen gas with a standard concentration; The hydrogen gas to be tested is introduced into the second gas chamber based on the gas flow rate.

4. A method for detecting hydrogen purity according to claim 1, characterized in that: The applying heat to the thermistor comprises: Get the preset heating temperature and heating time; Heat is applied to the thermistor according to the heating temperature and the heating time.

5. A method for detecting hydrogen purity according to claim 2, characterized in that: The obtaining of the resistance change value of the thermistor and the detection value of the circuit output terminal includes: Acquire a first change value of the first thermistor and a second change value of the second thermistor, and use the first change value and the second change value as the resistance change value; The voltage change value and the current value at the output end of the circuit are detected, and the voltage change value and the current value are used as the detection value.

6. A method for detecting hydrogen purity according to claim 5, characterized in that: The step of performing purity detection of the hydrogen gas to be tested according to the resistance change value and the detection value comprises: Determine a change difference between the first change value and the second change value; Determine whether the change difference is greater than a preset difference, and if so, determine that the purity of the hydrogen to be tested is unqualified; Otherwise, the purity of the hydrogen to be tested is detected according to the detection value.

7. A method for detecting hydrogen purity according to claim 6, characterized in that: The step of performing purity detection of the hydrogen gas to be tested according to the resistance change value and the detection value comprises: Determine whether the detection value is greater than the corresponding preset threshold value, and if so, determine that the purity detection of the hydrogen to be tested is unqualified; Otherwise, it is determined that the purity of the hydrogen to be tested is qualified.

8. A hydrogen purity detection device, characterized in that: include: A gas acquisition and circuit construction module, used for acquiring sample gas and hydrogen gas to be tested, and constructing a Wheatstone bridge circuit based on the sample gas and the hydrogen gas to be tested, wherein the circuit includes two fixed resistors and two thermistors; A resistance heating module, used for applying heat to the thermistor and obtaining a resistance change value of the thermistor and a detection value of the circuit output end; The hydrogen purity detection module is used to detect the purity of the hydrogen to be tested according to the resistance change value and the detection value.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the hydrogen purity detection method according to any one of claims 1 to 7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement a hydrogen purity detection method according to any one of claims 1 to 7 when executed.

Images