CN210664903U - Hydrogen fuel leakage detection sensor - Google Patents
Hydrogen fuel leakage detection sensor Download PDFInfo
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- CN210664903U CN210664903U CN201921420538.2U CN201921420538U CN210664903U CN 210664903 U CN210664903 U CN 210664903U CN 201921420538 U CN201921420538 U CN 201921420538U CN 210664903 U CN210664903 U CN 210664903U
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Abstract
The utility model provides a hydrogen fuel leakage detection sensor, which comprises a controller MCU, a hydrogen acquisition circuit I and a hydrogen acquisition circuit II; the semiconductor type hydrogen sensor is connected with the controller MCU through the signal conditioning circuit I, and is used for acquiring a hydrogen concentration signal I in an environment to be measured in real time and transmitting the hydrogen concentration signal I to the controller MCU; the electrochemical hydrogen sensor is connected with the controller MCU through the signal conditioning circuit I, and is used for acquiring a hydrogen concentration signal II in an environment to be measured in real time and transmitting the hydrogen concentration signal II to the controller MCU; and the controller MCU outputs and stores a detection result according to the hydrogen concentration signal I and the hydrogen concentration signal II. The utility model discloses be in the same place two kinds of sensor sets, when fuel takes place to reveal, this hydrogen fuel reveals that detection sensor carries out effectual detection to revealing of hydrogen fuel, guarantee vehicle and personal property safety.
Description
Technical Field
The utility model relates to a hydrogen fuel reveals and detects technical field, specific theory has related to a hydrogen fuel reveals and detects sensor.
Background
Hydrogen-fueled automobiles are classified into two types: hydrogen internal combustion engine vehicles, which are powered by combustion of hydrogen (usually obtained by decomposition of methane or electrolysis of water) by an internal combustion engine; a hydrogen fuel cell vehicle is provided in which hydrogen or a hydrogen-containing substance is reacted with oxygen in the air in a fuel cell to generate electric power to drive an electric motor, and the vehicle is driven by the electric motor. Compared with the traditional gasoline vehicle, the hydrogen fuel vehicle has the following maximum advantages: the hydrogen reacts with the oxygen in the air to only generate steam, thereby effectively reducing the problem of air pollution caused by the traditional gasoline vehicle. However, hydrogen molecules are very small, and leakage is very easy to occur in the using process; therefore, the real-time detection of hydrogen leakage is an important link for guaranteeing the safe operation of the hydrogen fuel automobile.
In the operation process, the hydrogen fuel automobile has the risk that the fuel pipeline is loosened, and once the fuel pipeline is loosened, broken or fallen off, the hydrogen fuel can leak; the hydrogen is not beneficial to breathing, is colorless and tasteless, cannot be detected by the nose of a person, and is easy to cause poisoning of the person due to the leakage of the hydrogen; in addition, the ignition point of the hydrogen is only 585 ℃, the content of the air is in the range of 4-75%, once the leakage amount of the hydrogen reaches the explosion limit value, the hydrogen can explode when meeting open fire; on the other hand, hydrogen fuel leakage will cause waste of energy.
At present, in the prior art, hydrogen leakage is generally detected by a single sensor, and the effect is poor; in the actual use process, a situation that the detection cannot be performed occurs, and once the situation occurs, a great loss is caused to the safety of people and property.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at the not enough of prior art to a detection sensor is revealed to hydrogen fuel is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a hydrogen fuel leakage detection sensor comprises a controller MCU, a hydrogen acquisition circuit I and a hydrogen acquisition circuit II;
the hydrogen acquisition circuit I comprises a semiconductor type hydrogen sensor and a signal conditioning circuit I, and the hydrogen acquisition circuit II comprises an electrochemical type hydrogen sensor and a signal conditioning circuit II;
the semiconductor type hydrogen sensor is connected with the controller MCU through the signal conditioning circuit I, and is used for acquiring a hydrogen concentration signal I in an environment to be measured in real time and transmitting the hydrogen concentration signal I to the controller MCU;
the electrochemical hydrogen sensor is connected with the controller MCU through the signal conditioning circuit II, and is used for acquiring a hydrogen concentration signal II in an environment to be measured in real time and transmitting the hydrogen concentration signal II to the controller MCU;
and the controller MCU stores the detection result according to the hydrogen concentration signal I and the hydrogen concentration signal II.
The utility model discloses relative prior art has substantive characteristics and progress, specific theory:
the utility model provides a hydrogen fuel leakage detection sensor, which comprises a controller MCU, a hydrogen acquisition circuit I and a hydrogen acquisition circuit II, wherein two hydrogen acquisition circuits are integrated in one sensor structure; the hydrogen acquisition circuit I is used for effectively detecting the condition of small leakage of hydrogen fuel, and the hydrogen acquisition circuit II is used for effectively detecting the condition of large leakage of hydrogen fuel caused by breakage or falling of a fuel pipeline; the utility model integrates two sensors, thereby effectively solving the technical problem of poor detection effect of the existing single hydrogen leakage sensor for vehicles, improving the accuracy of hydrogen fuel leakage detection, expanding the application range and simultaneously ensuring personal and property safety; this hydrogen fuel reveals the mode that detects the sensor and adopt electrochemistry type hydrogen sensor and semiconductor type hydrogen sensor to combine, has strengthened the utility model discloses a shock resistance can, personal and property safety have further been ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Example 1
A hydrogen fuel leakage detection sensor comprises a controller MCU, a hydrogen acquisition circuit I and a hydrogen acquisition circuit II; the hydrogen acquisition circuit I comprises a semiconductor type hydrogen sensor and a signal conditioning circuit I, and the hydrogen acquisition circuit II comprises an electrochemical type hydrogen sensor and a signal conditioning circuit II; the semiconductor type hydrogen sensor is connected with the controller MCU through the signal conditioning circuit I, and is used for acquiring a hydrogen concentration signal I in an environment to be measured in real time and transmitting the hydrogen concentration signal I to the controller MCU; the electrochemical hydrogen sensor is connected with the controller MCU through the signal conditioning circuit II, and is used for acquiring a hydrogen concentration signal II in an environment to be measured in real time and transmitting the hydrogen concentration signal II to the controller MCU; and the controller MCU stores the detection result according to the hydrogen concentration signal I and the hydrogen concentration signal II.
In this embodiment, the semiconductor type hydrogen sensor may be an MQ-8 hydrogen gas sensor, or another semiconductor type hydrogen sensor that can implement the above-described functions; the electrochemical hydrogen sensor can be an electrochemical hydrogen sensor ME or other electrochemical hydrogen sensors capable of realizing the functions; the controller MCU adopts STM32 series single-chip microcomputer or other microcontrollers capable of realizing the functions.
In the embodiment, the response speed of the electric signal output by the semiconductor type hydrogen sensor is high, and the reaction speed of the electrochemical type hydrogen sensor is low; therefore, when the hydrogen fuel leaks, the semiconductor-type hydrogen sensor can detect the leakage of hydrogen gas first; when the detected hydrogen concentration is within 1000PPM, the hydrogen fuel leakage detection sensor mainly outputs according to the electric signal of the semiconductor type hydrogen sensor, and the electric signal output value of the electrochemical type hydrogen sensor is not used as the basis for calculating the concentration; when the detected hydrogen concentration exceeds 1000PPM, the hydrogen fuel leakage detection sensor mainly depends on an electric signal output by the electrochemical hydrogen sensor.
The working principle of the hydrogen fuel leakage detection sensor is as follows: the hydrogen acquisition circuit I is used for effectively detecting the condition of small leakage of hydrogen fuel, and the hydrogen acquisition circuit II is used for effectively detecting the condition of large leakage of hydrogen fuel caused by breakage or falling of a fuel pipeline; the utility model integrates two sensors, thereby improving the accuracy of hydrogen fuel leakage detection and expanding the application range; the current not good technical problem of single sensor detection effect is revealed to automobile-used hydrogen of effective solution simultaneously.
Example 2
This embodiment provides a specific implementation of a signal conditioning circuit i, as shown in fig. 1, the signal conditioning circuit i includes a load resistor RL1, a resistor R1, and a capacitor C1; one end of the load resistor RL1 is connected with a ground terminal, and the other end of the load resistor RL1 is respectively connected with two pins of the semiconductor type hydrogen sensor and one end of the resistor R1; the other end of the resistor R1 is respectively connected with a pin of the controller MCU and one end of the capacitor C1; the other end of the capacitor C1 is connected with a grounding end; and the pins of the semiconductor type hydrogen sensor are also respectively connected with a power supply end and a grounding end.
The embodiment also provides a specific implementation of the signal conditioning circuit ii, and as shown in fig. 1, the signal conditioning circuit ii includes a load resistor RL2, an operational amplifier, a resistor R2, a resistor R3, a capacitor C2, and a capacitor C3; the load resistor RL2 is connected in parallel between two pins of the electrochemical hydrogen sensor; after the resistor R3 and the capacitor C2 are connected in parallel, one end of the resistor R3 is respectively connected with one end of the load resistor RL2 and one input end of the operational amplifier, and the other end of the resistor R2 is respectively connected with the output end of the operational amplifier and one end of the resistor R2; the other input end of the operational amplifier is connected with the other end of the load resistor RL 2; the other end of the resistor R2 is respectively connected with a pin of the controller MCU and one end of the capacitor C3, and the other end of the capacitor C3 is connected with a ground terminal.
In this embodiment, the signal conditioning circuit i converts the analog signal acquired by the semiconductor type hydrogen sensor in real time into a digital signal, and transmits the digital signal to the controller MCU through a pin AD 1; the signal conditioning circuit II converts analog signals acquired by the electrochemical hydrogen sensor in real time into digital signals and transmits the digital signals to the controller MCU through a pin AD 2; so as to be used for the controller MCU to carry out data processing.
Example 3
The present embodiment differs from the above embodiments in that: and the controller MCU is also connected with an alarm circuit. Once, hydrogen fuel takes place to leak, controller MCU sends alarm information through warning circuit, warns the user, has further ensured hydrogen fuel automobile driver's personal and property safety.
In the embodiment, a specific implementation manner of an alarm circuit is provided, the alarm circuit adopts a buzzer or an audible and visual alarm circuit, and the hydrogen concentration signal i or the hydrogen concentration signal ii exceeds a preset value; the controller MCU generates an alarm instruction, and the alarm circuit receives the alarm instruction and sends alarm information according to the alarm instruction. The buzzer or the sound and light alarm circuit is a conventional technical means, and the details are not described herein.
In other embodiments, the alarm circuit may further adopt a voice alarm chip, and the model of the voice alarm chip is JQ 6400.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (5)
1. A hydrogen fuel leakage detection sensor, characterized in that: the hydrogen collection device comprises a controller MCU, a hydrogen collection circuit I and a hydrogen collection circuit II;
the hydrogen acquisition circuit I comprises a semiconductor type hydrogen sensor and a signal conditioning circuit I, and the hydrogen acquisition circuit II comprises an electrochemical type hydrogen sensor and a signal conditioning circuit II;
the semiconductor type hydrogen sensor is connected with the controller MCU through the signal conditioning circuit I, and is used for acquiring a hydrogen concentration signal I in an environment to be measured in real time and transmitting the hydrogen concentration signal I to the controller MCU;
the electrochemical hydrogen sensor is connected with the controller MCU through the signal conditioning circuit II, and is used for acquiring a hydrogen concentration signal II in an environment to be measured in real time and transmitting the hydrogen concentration signal II to the controller MCU;
and the controller MCU stores the detection result according to the hydrogen concentration signal I and the hydrogen concentration signal II.
2. The hydrogen fuel leak detection sensor according to claim 1, characterized in that: the signal conditioning circuit I comprises a load resistor RL1, a resistor R1 and a capacitor C1; one end of the load resistor RL1 is connected with a ground terminal, and the other end of the load resistor RL1 is respectively connected with two pins of the semiconductor type hydrogen sensor and one end of the resistor R1; the other end of the resistor R1 is respectively connected with a pin of the controller MCU and one end of the capacitor C1; the other end of the capacitor C1 is connected with a grounding end; and the pins of the semiconductor type hydrogen sensor are also respectively connected with a power supply end and a grounding end.
3. The hydrogen fuel leak detection sensor according to claim 1, characterized in that: the signal conditioning circuit II comprises a load resistor RL2, an operational amplifier, a resistor R2, a resistor R3, a capacitor C2 and a capacitor C3; the load resistor RL2 is connected in parallel between two pins of the electrochemical hydrogen sensor; after the resistor R3 and the capacitor C2 are connected in parallel, one end of the resistor R3 is respectively connected with one end of the load resistor RL2 and one input end of the operational amplifier, and the other end of the resistor R2 is respectively connected with the output end of the operational amplifier and one end of the resistor R2; the other input end of the operational amplifier is connected with the other end of the load resistor RL 2; the other end of the resistor R2 is respectively connected with a pin of the controller MCU and one end of the capacitor C3, and the other end of the capacitor C3 is connected with a ground terminal.
4. A hydrogen fuel leak detection sensor according to any one of claims 1-3, characterized in that: and the controller MCU adopts an STM32 series single chip microcomputer.
5. The hydrogen fuel leak detection sensor according to claim 4, characterized in that: and the controller MCU is also connected with an alarm circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921420538.2U CN210664903U (en) | 2019-08-29 | 2019-08-29 | Hydrogen fuel leakage detection sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921420538.2U CN210664903U (en) | 2019-08-29 | 2019-08-29 | Hydrogen fuel leakage detection sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111942231A (en) * | 2020-07-23 | 2020-11-17 | 东风汽车集团有限公司 | Protection method, hydrogen management system and protection system for hydrogen leakage vehicle |
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2019
- 2019-08-29 CN CN201921420538.2U patent/CN210664903U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111942231A (en) * | 2020-07-23 | 2020-11-17 | 东风汽车集团有限公司 | Protection method, hydrogen management system and protection system for hydrogen leakage vehicle |
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