阅读说明：本技术 一种氢燃料电池车辆氢泄露位置检测方法及系统 (Method and system for detecting hydrogen leakage position of hydrogen fuel cell vehicle ) 是由 刘立锋 杨留锁 于 2019-09-30 设计创作，主要内容包括：本发明涉及氢燃料电池车辆技术领域,涉及一种氢燃料电池车辆氢泄露位置检测方法及系统。本发明通过在气体管道上设置泄漏口来模拟车辆的氢泄漏点,通过多个氢泄露传感器采集信息得到泄漏浓度数据,通过气体浓度数据定位车辆的泄漏聚集位置,可针对性的在氢燃料电池车辆的相应位置安装氢泄漏传感器,通过具体的氢燃料电池车辆氢泄露位置检测方法来获得安装氢泄露传感器位置,其可实时监控氢燃料电池的工作状态并快速定位氢泄漏点,可以避免意外的发生,解决了国内车辆安装氢泄漏探测器位置的随意性,提高了氢燃料电池车辆的安全性能。(The invention relates to the technical field of hydrogen fuel cell vehicles, in particular to a method and a system for detecting a hydrogen leakage position of a hydrogen fuel cell vehicle. The invention simulates the hydrogen leakage point of the vehicle by arranging the leakage port on the gas pipeline, acquires information by a plurality of hydrogen leakage sensors to obtain leakage concentration data, positions the leakage gathering position of the vehicle by the gas concentration data, can pertinently install the hydrogen leakage sensors at the corresponding positions of the hydrogen fuel cell vehicle, obtains the position for installing the hydrogen leakage sensors by a specific hydrogen leakage position detection method of the hydrogen fuel cell vehicle, can monitor the working state of the hydrogen fuel cell in real time and quickly position the hydrogen leakage point, can avoid accidents, solves the randomness of the position for installing the hydrogen leakage detector on domestic vehicles, and improves the safety performance of the hydrogen fuel cell vehicle.)

1. A hydrogen leakage position detection method for a hydrogen fuel cell vehicle, characterized by comprising the steps of:

step 1, determining the space volume of a detected vehicle and a region where hydrogen on the vehicle is likely to leak, wherein the detected vehicle with a hydrogen tank is in a static non-electrified state and is placed in a region with good ventilation conditions;

step 2, arranging a plurality of hydrogen leakage sensors on an area where hydrogen is likely to leak, arranging a gas pipeline on a detection vehicle, arranging a leakage port for leaking hydrogen on the gas pipeline, and communicating a hydrogen tank with the gas pipeline;

step 3, processing the detection signals obtained by the hydrogen leakage sensor to obtain gas concentration data, and obtaining the position of a corresponding leakage port according to the gas concentration data;

and 4, repeating the steps 1-3 to determine the installation position of the hydrogen leakage sensor on the hydrogen fuel cell vehicle.

2. The hydrogen leakage position detection method for a hydrogen fuel cell vehicle as claimed in claim 1, wherein in step 1, the region where there is a possibility of leakage of vehicle hydrogen is a hydrogen gas piping connection portion on the vehicle.

3. The hydrogen leakage position detection method for a hydrogen fuel cell vehicle according to claim 1, wherein in step 2, the diameter of the gas pipe is 3 to 5 mm, and the gas pipe is vertically placed on the test vehicle.

4. The hydrogen leakage position detection method for a hydrogen fuel cell vehicle according to claim 1, wherein in step 2, the leakage flow rate of the leakage hole is 570 ml/min, and the leakage flow rate is set at a position 14.2 cm downward from the highest point of the detection vehicle and 12.5 cm upward from the ground, namely, the hydrogen leakage is performed from the upward direction and the downward direction of the detection vehicle, respectively.

5. The hydrogen leakage position detection method for a hydrogen fuel cell vehicle according to claim 1, characterized in that in step 1, the hydrogen gas in the hydrogen tank on the vehicle under test is completely discharged and one complete ventilation is performed; the pressure in the purged hydrogen tank was 10 Kpa.

6. The hydrogen leakage position detection method for a hydrogen fuel cell vehicle according to claim 1, wherein in step 3, the detection signal obtained by the hydrogen leakage sensor is subjected to median average filtering processing, and then the detection signal subjected to the median average filtering processing is converted into gas concentration data.

7. The hydrogen leakage position detection method for a hydrogen fuel cell vehicle according to claim 1, wherein in step 2, before the hydrogen tank is again brought into communication with the gas pipe, a blowing operation is performed on the test vehicle to simulate a running process of the test vehicle.

8. The utility model provides a position detecting system is revealed to hydrogen fuel cell vehicle hydrogen which characterized in that, includes computer, hydrogen tank, detection vehicle and a plurality of hydrogen and reveals the sensor, the sensor setting is revealed to hydrogen detects each hydrogen pipeline interface position on the detection vehicle, pass through the hydrogen piping with the air valve that detects on the vehicle on the hydrogen tank and be connected, be provided with the flowmeter on the hydrogen piping, the sensor is revealed to hydrogen is connected with the data record appearance electricity, the data record appearance is connected with the computer electricity, the sensor is revealed to hydrogen is connected with the power electricity.

Technical Field

The invention relates to the technical field of hydrogen fuel cell vehicles, in particular to a method and a system for detecting a hydrogen leakage position of a hydrogen fuel cell vehicle.

Background

The national standard GBT26990-2011 fuel cell electric vehicle-mounted hydrogen system stipulates that a hydrogen leakage detector must be installed, but at present, the determination of the hydrogen leakage position of a hydrogen fuel cell vehicle is based on experience at home, and meanwhile, data of the hydrogen leakage concentration is not collected qualitatively to be used as a design source for positioning the position of the hydrogen leakage detector. The car with the same length is provided with 3-4 detectors, 5-6 detectors and different installation positions, and is mainly arranged above a hydrogen bottle, a galvanic pile, an air-conditioning return air inlet, a hydrogenation port and the like in the car, and hydrogen leakage and diffusion are different when the car is parked or driven; different parts leak, the condition of diffusion is also different, and this can lead to the hydrogen to leak the regional difference of diffusion gathering in the car, can cause the hydrogen leakage detector can't accurately discern the hydrogen position of leaking or discern the slow problem in hydrogen position of leaking, brings the hidden danger for the vehicle safety of traveling.

Disclosure of Invention

The invention aims to provide a hydrogen leakage position detection method and a hydrogen leakage position detection system for a hydrogen fuel cell vehicle, which can monitor the working state of a hydrogen fuel cell in real time and quickly locate a hydrogen leakage point.

In order to solve the technical problems, the technical scheme adopted by the invention for solving the technical problems is as follows:

a hydrogen leakage position detection method and system for a hydrogen fuel cell vehicle includes the following steps:

step 1, determining the space volume of a detected vehicle and a region where hydrogen on the vehicle is likely to leak, wherein the detected vehicle with a hydrogen tank is in a static non-electrified state and is placed in a region with good ventilation conditions;

step 2, arranging a plurality of hydrogen leakage sensors on an area where hydrogen is likely to leak, arranging a gas pipeline on a detection vehicle, arranging a leakage port for leaking hydrogen on the gas pipeline, and communicating a hydrogen tank with the gas pipeline;

step 3, processing the detection signals obtained by the hydrogen leakage sensor to obtain gas concentration data, and obtaining the position of a corresponding leakage port according to the gas concentration data;

and 4, repeating the steps 1-3 to determine the installation position of the hydrogen leakage sensor on the hydrogen fuel cell vehicle.

Preferably, in step 1, the area where the vehicle hydrogen is likely to leak is a hydrogen pipeline interface part on the vehicle.

Preferably, in step 2, the diameter of the gas pipeline is 3-5 mm, and the gas pipeline is vertically placed on the detection vehicle.

Preferably, in step 2, the leakage flow rate of the leakage hole is 570 ml/min, and the leakage flow rate is set at a position 14.2 cm below the highest point of the detection vehicle and 12.5 cm above the ground, namely, hydrogen gas is discharged from the upper direction and the lower direction of the detection vehicle respectively.

Preferably, in step 1, all hydrogen gas in the hydrogen tank on the vehicle to be detected is discharged, and complete ventilation is performed once; the pressure in the purged hydrogen tank was 10 Kpa.

Preferably, in step 3, the detection signal obtained by the hydrogen leakage sensor is subjected to median average filtering, and the detection signal subjected to median average filtering is converted into gas concentration data.

Preferably, in step 2, before the hydrogen tank is communicated with the gas pipeline, the test vehicle is blown to simulate the driving process of the test vehicle.

The invention also comprises a hydrogen leakage position detection system of the hydrogen fuel cell vehicle, which comprises a computer, a hydrogen tank, a detection vehicle and a plurality of hydrogen leakage sensors, wherein the hydrogen leakage sensors are arranged at the interface parts of all hydrogen pipelines on the detection vehicle, the hydrogen tank is connected with an air valve on the detection vehicle through a hydrogen pipe, a flow meter is arranged on the hydrogen pipe, the hydrogen leakage sensors are electrically connected with a data recorder, the data recorder is electrically connected with the computer, and the hydrogen leakage sensors are electrically connected with a power supply.

The invention has the beneficial effects that:

the invention simulates the hydrogen leakage point of the vehicle by arranging the leakage port on the gas pipeline, acquires information by a plurality of hydrogen leakage sensors to obtain leakage concentration data, positions the leakage gathering position of the vehicle by the gas concentration data, can pertinently install the hydrogen leakage sensors at the corresponding positions of the hydrogen fuel cell vehicle, obtains the position for installing the hydrogen leakage sensors by a specific hydrogen leakage position detection method of the hydrogen fuel cell vehicle, can monitor the working state of the hydrogen fuel cell in real time and quickly position the hydrogen leakage point, can avoid accidents, solves the randomness of the position for installing the hydrogen leakage detector on domestic vehicles, and improves the safety performance of the hydrogen fuel cell vehicle.

Drawings

Fig. 1 is a schematic diagram of a hydrogen leakage position detection system of a hydrogen fuel cell vehicle of the invention.

Fig. 2 is a schematic view of the gas circuit of the present invention.

Fig. 3 is a schematic view of data images obtained by the hydrogen leak sensor of the present invention.

The reference numbers in the figures illustrate: 1. detecting a vehicle; 2. a hydrogen tank; 3. a flow meter; 4. an air valve; 5. a hydrogen leak sensor; 6. a computer; 7. a data recorder; 8. a power source;

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1 to 3, a hydrogen leakage position detection method and system for a hydrogen fuel cell vehicle includes the steps of:

step 1, determining the size of the space volume of a detection vehicle 1 (in terms of the structure of the vehicle, if hydrogen cannot enter a passenger compartment, the volume of a passenger should be reduced in practical operation) and a region where hydrogen on the vehicle is likely to leak, wherein the detection vehicle 1 provided with a hydrogen tank 2 is in a static non-electrified state and is placed in a region with good ventilation conditions;

step 2, arranging a plurality of hydrogen leakage sensors 5 on an area where hydrogen is likely to leak, arranging a gas pipeline on the detection vehicle 1, arranging a leakage port for leaking hydrogen on the gas pipeline, and communicating the hydrogen tank 2 with the gas pipeline;

step 3, processing the detection signal obtained by the hydrogen leakage sensor 5 to obtain gas concentration data, and obtaining the position of a corresponding leakage port according to the gas concentration data;

and 4, repeating the steps 1-3 to determine the installation position of the hydrogen leakage sensor 5 on the hydrogen fuel cell vehicle.

The invention simulates the hydrogen leakage point of the vehicle by arranging the leakage port on the gas pipeline, acquires information by a plurality of hydrogen leakage sensors 5 to obtain leakage concentration data, positions the leakage gathering position of the vehicle by the gas concentration data, can pertinently install the hydrogen leakage sensors at the corresponding positions of the hydrogen fuel cell vehicle, and obtains the position of installing the hydrogen leakage sensors 5 by a specific hydrogen leakage position detection method of the hydrogen fuel cell vehicle, thereby monitoring the working state of the hydrogen fuel cell in real time and quickly positioning the hydrogen leakage point, avoiding accidents, solving the randomness of installing the hydrogen leakage detector position of domestic vehicles and improving the safety performance of the hydrogen fuel cell vehicle.

In the step 1, the area where hydrogen of the vehicle is likely to leak is a hydrogen pipeline interface part on the vehicle, and then the area where hydrogen is likely to leak is specifically positioned at the actual distribution position of the vehicle by analyzing a large amount of collected leakage detector data, so that an accurate position can be provided for the position where the hydrogen leakage detector is installed, and the detection precision of the hydrogen leakage sensor 5 is improved.

The hydrogen leakage during the actual vehicle running process may be due to corroded pores in the pipeline, and the pore diameter is usually in millimeter order, so in step 2, the diameter of the gas pipeline used is 3-5 mm, and the gas pipeline is vertically placed on the detection vehicle 1.

In step 2, the leakage flow rate of the leakage hole is 570 ml/min (hydrogen flow rate flowing when a small hole with a diameter of 0.2 mm applies a pressure of 10kpa, the pressure of 10kpa is set to be the hydrogen flow rate flowing when a domestic fuel cell can work under the pressure, and the pressure can also work as low as 6 kpa), and the leakage flow rate is set at a position 14.2 cm below the highest point of the detection vehicle 1 and at a position 12.5 cm above the ground, namely, hydrogen leakage is performed from the upper direction and the lower direction of the detection vehicle 1 respectively.

In step 1, completely discharging hydrogen in a hydrogen tank 2 on a detection vehicle 1, and carrying out complete ventilation once; the pressure in the hydrogen tank 2 after the purging is 10 Kpa.

In step 3, the gas pipeline is subjected to leakage testing according to 1%, 2% and 4%, and detection signals of the hydrogen leakage sensors 5 are monitored by the computer 6

In the step 3, firstly, the hydrogen leakage sensor 5 obtains a detection signal to carry out median average filtering processing, and then the detection signal after the median average filtering processing is converted into gas concentration data; the detection signal is subjected to median average filtering processing, so that the sampling value deviation caused by large-amplitude pulse interference can be eliminated, the periodic random noise interference is well inhibited, and the smoothness is high. After median average filtering processing, the reliability of the detected data is ensured.

In step 2, before the hydrogen tank 2 is connected to the gas pipeline, the test vehicle 1 is blown to simulate the driving process of the test vehicle 1.

The detection vehicle 1 that the flow simulation driving in-process of blowing was increased, leaked sensor 5 through hydrogen and detected the hydrogen that probably stops at the vehicle rear, and the concentration of hydrogen that sensor 5 detected was leaked to hydrogen can be diluted by the flow of wind, and it can adopt ultrasonic resonator sensor and hydrogen to leak sensor 5 and acquire hydrogen concentration in step, further improves sensitivity.

The invention also comprises a hydrogen leakage position detection system of the hydrogen fuel cell vehicle, which comprises a computer 6, a hydrogen tank 2, the detection vehicle 1 and a plurality of hydrogen leakage sensors 5, wherein the hydrogen leakage sensors 5 are arranged at the interface parts of each hydrogen pipeline on the detection vehicle 1, the hydrogen tank 2 is connected with an air valve 4 on the detection vehicle 1 through a hydrogen pipe, the hydrogen pipe is provided with a flowmeter 3, the hydrogen leakage sensors 5 are electrically connected with a data recorder 7, the data recorder 7 is electrically connected with the computer 6, and the hydrogen leakage sensors 5 are electrically connected with a power supply 8.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.