CN111681396A - Vehicle-mounted liquid hydrogen bottle ground test system and test method - Google Patents
Vehicle-mounted liquid hydrogen bottle ground test system and test method Download PDFInfo
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
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Abstract
The invention discloses a ground test system and a ground test method for a vehicle-mounted liquid hydrogen bottle, wherein the ground test system comprises the following steps: the system comprises an engineer station, a control subsystem, a measurement subsystem, a safety monitoring subsystem and a field sensor, wherein the field sensor is used for acquiring a liquid hydrogen medium state signal, a liquid hydrogen bottle state signal and a monitoring signal of a vehicle-mounted liquid hydrogen storage and supply system; the control subsystem acquires a liquid hydrogen medium state signal, processes the liquid hydrogen medium state signal and then sends the processed liquid hydrogen medium state signal to an engineer station; the measuring subsystem acquires a liquid hydrogen bottle state signal, detects the liquid hydrogen bottle and then sends the liquid hydrogen bottle to an engineer station; the safety monitoring subsystem carries out video monitoring and hydrogen safety monitoring on key positions of the system and sends monitoring signals to an engineer station; and the engineer station generates a control signal according to the preset safety threshold range corresponding to each signal and sends the control signal to the control subsystem to adjust the electromagnetic valve to perform corresponding actions. The invention continuously monitors and controls the running state and the process parameters of all the equipment of the hydrogen supply system, and records and generates alarm information to ensure that the equipment is in a safe and stable running state.
Description
Technical Field
The invention relates to the technical field of liquid hydrogen testing, in particular to a vehicle-mounted liquid hydrogen bottle ground testing system and a testing method.
Background
The vehicle-mounted liquid hydrogen bottle is a main body of hydrogen supply equipment of the hydrogen fuel cell vehicle and is used for protecting the driving and navigating of a vehicle-mounted hydrogen supply system in stable operation. The key technical research of the vehicle-mounted liquid hydrogen storage and supply system positioned in the vehicle-mounted liquid hydrogen supply system with the technical leading characteristics aims at mastering a vehicle-mounted liquid hydrogen storage core technology and developing a 60kg storage capacity vehicle-mounted liquid hydrogen bottle, the key technology of the vehicle-mounted liquid hydrogen supply system suitable for heavy-duty automobiles and liquid hydrogen transport vehicles is developed, the development of a 60kg storage capacity vehicle-mounted liquid hydrogen container is completed, and the ground test verification of the gas supply equipment with the driving range not shorter than 500km of the vehicle is realized. In the prior art, the vehicle-mounted liquid hydrogen storage and supply system is not comprehensively and effectively monitored, and the normal operation of the vehicle-mounted liquid hydrogen storage and supply system is protected.
Disclosure of Invention
Therefore, the ground test system and the ground test method for the vehicle-mounted liquid hydrogen bottle provided by the invention overcome the defects that the vehicle-mounted liquid hydrogen storage and supply system is not comprehensively and effectively monitored in the prior art, and the normal operation of the vehicle-mounted liquid hydrogen storage and supply system is guaranteed.
In a first aspect, an embodiment of the present invention provides a vehicle-mounted liquid hydrogen bottle ground testing system, including: engineer station, control subsystem, measurement subsystem, safety monitoring subsystem and field sensor, wherein,
the on-site sensor collects a liquid hydrogen medium state signal, a liquid hydrogen bottle state signal and a monitoring signal of the vehicle-mounted liquid hydrogen storage and supply system;
the control subsystem acquires a liquid hydrogen medium state signal, performs data processing on the liquid hydrogen medium state signal by a programmable controller and then sends the liquid hydrogen medium state signal to an engineer station;
the measurement subsystem acquires a liquid hydrogen bottle state signal, monitors the state of the liquid hydrogen bottle and sends the liquid hydrogen bottle to an engineer station;
the safety monitoring subsystem carries out video monitoring and hydrogen safety monitoring on key positions of the vehicle-mounted liquid hydrogen storage and supply system and sends monitoring signals to an engineer station;
and after receiving the liquid hydrogen medium state signal, the liquid hydrogen bottle state signal and the monitoring signal, the engineer station generates a control signal according to a preset safety threshold range corresponding to each signal and sends the control signal to the control subsystem, and the control subsystem adjusts the electromagnetic valve to perform corresponding actions according to the control signal.
In one embodiment, the in-situ sensor comprises: pressure transmitter, temperature transmitter, liquid level transmitter, thermocouple, foil gage, explosion-proof video monitoring device and flammable detector.
In one embodiment, the field sensors are all in a two-wire signal transmission mode, and each measuring channel is provided with a power distribution isolator of one channel.
In one embodiment, the control subsystem acquires pressure, temperature and liquid level signals in the liquid hydrogen bottle, which are respectively acquired by the pressure transmitter, the temperature transmitter and the liquid level transmitter;
the measuring subsystem acquires bottle wall temperature and strain signals of the liquid hydrogen bottle, which are sent by the thermocouple and the strain gauge;
and the safety monitoring subsystem acquires field video monitoring and hydrogen concentration signals respectively sent by the explosion-proof video monitoring device and the combustible detector.
In one embodiment, the engineer station is used for providing a user operation and monitoring interface, recording data in real time in a text file or spreadsheet mode, and outputting a control quantity and a measurement quantity.
In one embodiment, the vehicle-mounted communication equipment is connected to a vehicle-mounted liquid hydrogen bottle ground test system through a CAN bus intelligent conversion interface card.
In a second aspect, an embodiment of the present invention provides a vehicle-mounted liquid hydrogen bottle ground testing method, including the following steps:
determining an initial pressure value of the liquid hydrogen bottle according to actual working conditions, selecting corresponding electromagnetic valves for combination, controlling a control subsystem to open the corresponding electromagnetic valves to add liquid hydrogen to the liquid hydrogen bottle, and monitoring a liquid hydrogen medium state signal, a liquid hydrogen bottle state signal and a monitoring signal in the bottle in real time;
and when at least one of the liquid hydrogen medium state signal, the liquid hydrogen bottle state signal and the monitoring signal of the vehicle-mounted liquid hydrogen storage and supply system is abnormal, an alarm signal is sent out.
In one embodiment, the liquid hydrogen medium state signal comprises pressure, temperature and liquid level in the liquid hydrogen bottle, and when the liquid level reaches a set value, the electromagnetic valve is controlled to be closed;
and selecting the electromagnetic valve to be vaporized to open according to the difference value between the real-time feedback pressure value and the set value, controlling the opening and closing time of the electromagnetic valve, and keeping the pressure of the bottle unchanged.
In one embodiment, the liquid hydrogen bottle status signal comprises: the monitoring signals comprise video monitoring and hydrogen concentration signals; and when at least one of the pressure and the liquid level in the bottle, the strain and the temperature of the bottle wall and the hydrogen concentration is not in the corresponding preset safety threshold range, sending out an alarm signal.
In one embodiment, the video monitors and observes the working condition of the whole process system, and when abnormality occurs, an alarm instruction manually triggered by an engineer is obtained, and an alarm signal is sent.
The technical scheme of the invention has the following advantages:
1. the vehicle-mounted liquid hydrogen bottle ground test system and the test method provided by the embodiment of the invention can continuously monitor and control the running states and process parameters of all equipment of the hydrogen supply system, and record and generate alarm information, so that the whole hydrogen supply system is in a monitorable, visible, safe, reliable and stable running state.
2. The ground test system and the ground test method for the vehicle-mounted liquid hydrogen bottle provided by the embodiment of the invention can effectively monitor all equipment states and process parameters of a hydrogen supply system; automatic control is realized, sound and light alarms are given to all important parameters, equipment, systems and the like, and all data are stored and have historical traceability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a structural composition diagram of a vehicle-mounted liquid hydrogen bottle ground testing system provided by an embodiment of the invention;
fig. 2 is a composition diagram of a specific example of the vehicle-mounted liquid hydrogen bottle ground testing system according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of the positions of the arrangement points of the thermocouples and the strain gauges according to the embodiment of the present invention;
fig. 4 is a flowchart of a specific example of a ground testing method for a vehicle-mounted liquid hydrogen bottle according to an embodiment of the present invention;
fig. 5 is a flowchart of a specific example of a ground testing method for a vehicle-mounted liquid hydrogen bottle according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment of the invention provides a vehicle-mounted liquid hydrogen bottle ground test system, as shown in fig. 1, comprising: the system comprises an engineer station, a control subsystem, a measurement subsystem, a safety monitoring subsystem and a field sensor, wherein the field sensor acquires a liquid hydrogen medium state signal, a liquid hydrogen bottle state signal and a monitoring signal of a vehicle-mounted liquid hydrogen storage and supply system; the control subsystem acquires a liquid hydrogen medium state signal, performs data processing on the liquid hydrogen medium state signal by a programmable controller and then sends the liquid hydrogen medium state signal to an engineer station; the measurement subsystem acquires a liquid hydrogen bottle state signal, performs state detection on the liquid hydrogen bottle and then sends the liquid hydrogen bottle to an engineer station; the safety monitoring subsystem is to the key position of on-vehicle liquid hydrogen storage system, includes: the gas supply pipeline and the liquid hydrogen bottle are used for carrying out video monitoring and hydrogen safety monitoring and sending monitoring signals to an engineer station; and after receiving the liquid hydrogen medium state signal, the liquid hydrogen bottle state signal and the monitoring signal, the engineer station generates a control signal according to a preset safety threshold range corresponding to each signal and sends the control signal to the control subsystem, and the control subsystem adjusts the electromagnetic valve to perform corresponding actions according to the control signal.
In an embodiment of the present invention, as shown in fig. 2, the in-situ sensor includes: pressure transmitter, temperature transmitter, liquid level transmitter, thermocouple, foil gage, explosion-proof video monitoring device and flammable detector. The data collected by the pressure transmitter, the temperature transmitter and the liquid level transmitter can truly reflect the state of the medium in the bottle, namely whether the medium is in a gas state or a liquid state, whether the medium is in a pressure state or a liquid state or not, and whether the medium is in a liquid state or not; the thermocouple and the strain gauge can objectively reflect the storage state of the liquid hydrogen bottle, the storage temperature of the liquid hydrogen bottle is generally 253 ℃ below zero, when the change of the strain measured by the strain gauge indicates that the liquid hydrogen bottle deforms under the external pressure, the temperature measured by the thermocouple can be used for indicating whether damage and leakage occur or not by integrating the temperature measured by the thermocouple, when the pressure change value changes, the temperature measured by the thermocouple is within the range of a preset safety threshold value, the leakage does not occur, and if the temperature measured by the thermocouple is not within the safety threshold value, the leakage is caused because the liquid hydrogen bottle is damaged; the combustible detector can detect the hydrogen concentration near liquid hydrogen bottle and air supply line, and explosion-proof video monitoring device can help the clear scene of understanding the on-the-spot equipment in engineer station, and the operating condition who supplies the system is stored up to reflection liquid hydrogen that data can be accurate through above each sensor survey, and help engineer station to store up the system and monitor comprehensively to liquid hydrogen, establishes good basis for realizing accurate automatic control.
The field sensors adopt a two-wire system 4-20mA signal transmission mode, have the advantages of long transmission distance, small attenuation, strong anti-interference capability and the like, and are provided with a power distribution isolator of one channel for prolonging the service life of the acquisition card and completing two-wire system power distribution of the sensors.
In the embodiment of the invention, as shown in fig. 2, an engineer station is connected with a vehicle-mounted ECU, a software running platform is provided to complete ground test of vehicle-mounted liquid hydrogen storage and supply equipment, test process monitoring of the hydrogen supply equipment is completed through a monitoring interface, real-time state display of a process system is supported, all sensor parameters are recorded in a report form in real time, and the system has the functions of historical data storage, historical data viewing and fault alarm. In order to finish the communication with the whole vehicle, a CAN Bus intelligent conversion interface card CANCOM terminal is configured, the RS485 communication equipment CAN be connected to a CAN-Bus field Bus, and the equipment interface card supports the CAN-Bus communication rate of 600-plus-one 230400bps and 5Kbps-1 Mbps.
The control subsystem is a PLC control subsystem, completes 4 paths of pressure, 4 paths of temperature and 2 paths of liquid level in the technical process by controlling a digital I/O module and an analog I/O module, has the advantages of convenient programming, flexible use, high reliability, strong anti-interference capability and the like, adopts a modularized integration mode, is convenient for the expansion of a hardware system, and controls the solenoid valve and the like on the technical pipeline to control the solenoid valve in the hydrogen supply process. The process state is monitored by acquiring pressure, temperature and liquid level signals of the pipeline in the liquid hydrogen bottle, which are respectively acquired by the pressure transmitter, the temperature transmitter and the liquid level transmitter, so that the system is ensured to run safely.
The measurement subsystem is the NI measurement subsystem, adopts the CDAQ collection system of NI company, adopts CDAQ9179 portable quick-witted case, possesses 8 slots, supports the hot plug to select from, and USB3.0 provides faster, the higher performance data stream simultaneously, supports three kinds of different analog quantity collection rates. And acquiring bottle wall temperature and strain signals of the liquid hydrogen bottle sent by the thermocouple and the strain gauge, measuring the temperature and strain of the liquid hydrogen vacuum multilayer heat-insulating container in a low-temperature state, and monitoring the state of the vacuum multilayer heat-insulating container. The temperature acquisition module adopts an NI9212 module, has 8 channels, 24-bit resolution, 50/60hz denoising, built-in excitation and automatic detection functions, and completes the signal acquisition of the thermocouple at the acquisition rate of 95S/S of each channel. The strain acquisition adopts an NI9237 module, an NI9237 synchronous bridge module can be matched with CDAQ and CRIO for use, all signal conditioning required by 4 sensors based on the bridge is driven and measured simultaneously, and an NI9944 module is connected with a strain gauge to form an 1/4 bridge so as to finish the strain detection of the liquid hydrogen bottle. The positions of the arrangement points of the thermocouple and the strain gauge are shown in FIG. 3, wherein W1-W7 are the arrangement points of the thermocouple, and Y1-Y8 are the arrangement points of the strain gauge.
And the safety monitoring subsystem acquires field video monitoring and hydrogen concentration signals respectively sent by the explosion-proof video monitoring device and the combustible detector. The safety monitoring system is used for monitoring key positions of the system in real time and knowing the state of the field system in time, wherein the video system has video storage and playback functions and can be used for analyzing and confirming the state after a test, and the anti-explosion camera is used for observing the working state of the test liquid hydrogen bottle. The combustible detector is mainly characterized in that a hydrogen concentration probe is arranged near a liquid hydrogen bottle and a pipeline, the hydrogen concentration probe adopts an explosion-proof product, an output signal of the concentration probe is a 4-20mA current signal, a main control system of an engineer station is accessed to an acquisition board card, the main control system carries out corresponding concentration display, and a corresponding alarm function is made.
According to the regulation in GB/T26990-2011 vehicle-mounted hydrogen system technical condition, a control system and which hydrogen leakage three-level alarm you select: the alarm levels are respectively: slight leakage: the hydrogen content in the air exceeds 1 per thousand (1000-; moderate leakage: the hydrogen content in the air is more than 5 per thousand (5000-; emergency leakage: the hydrogen content in the air exceeds 1 percent (> 10000ppm), and an emergency leakage alarm is given. When the sensor exceeds the alarm value of the emergency leakage, the controller immediately closes the hydrogen supply solenoid valve.
The vehicle-mounted liquid hydrogen bottle ground test system provided by the embodiment of the invention can effectively monitor all equipment states and process parameters of a hydrogen supply system; all important parameters, equipment, systems and the like are provided with abnormal sound and light alarms, automatic control is realized, all data are stored and have historical traceability, and the whole hydrogen supply system is in a monitorable, visual, safe, reliable and stable running state.
Example 2
The embodiment of the invention provides a ground test method for a vehicle-mounted liquid hydrogen bottle, which comprises the following steps of:
step S1: determining an initial value of liquid hydrogen pressure according to actual working conditions, selecting corresponding electromagnetic valves for combination, controlling a control subsystem to open the corresponding electromagnetic valves to add liquid hydrogen to a liquid hydrogen bottle, and monitoring a liquid hydrogen medium state signal, a liquid hydrogen bottle state signal and a monitoring signal in the bottle in real time;
step S2: and when at least one of the liquid hydrogen medium state signal, the liquid hydrogen bottle state signal and the monitoring signal of the vehicle-mounted liquid hydrogen storage and supply system is abnormal, an alarm signal is sent out.
The liquid hydrogen medium state signal in the embodiment of the invention comprises the pressure, the temperature and the liquid level in the liquid hydrogen bottle, and when the liquid level reaches a set value, the electromagnetic valve is controlled to be closed; and selecting the electromagnetic valve to be vaporized to open according to the difference value between the real-time feedback pressure value and the set value, controlling the opening and closing time of the electromagnetic valve, and keeping the pressure of the bottle unchanged.
The liquid hydrogen bottle state signal in the embodiment of the invention comprises: the monitoring signals comprise video monitoring and hydrogen concentration signals; and when at least one of the pressure and the liquid level in the bottle, the strain and the temperature of the bottle wall and the hydrogen concentration is not in the corresponding preset safety threshold range, sending out an alarm signal.
In the embodiment of the invention, the working condition of the whole process system is monitored and observed by a video, and when abnormity occurs, an alarm instruction manually triggered by an engineer is obtained, and an alarm signal is sent.
In a specific embodiment, the whole working method flow is shown in fig. 5, and includes: liquid hydrogen adding control, automatic pressurization control and safety monitoring control.
1) Liquid hydrogen addition control: the system determines the initial value of the inlet pressure of the system according to the working condition required by the test, opens the liquid inlet valve, selects a proper electromagnetic valve for combination, opens the corresponding electromagnetic valve, adds liquid hydrogen to the bottle, monitors the liquid hydrogen bottle pressure and the liquid level in the bottle in real time, and closes the electromagnetic valve when the liquid level reaches the set value to keep the internal pressure of the liquid hydrogen bottle unchanged.
2) Automatic pressurization control: and when the manual valve at the outlet of the bottle is opened, the pressure of the bottle is reduced, and the regulating control system regulates the difference value between the feedback pressure value and the set value. And (3) selecting the electromagnetic valve to be vaporized to be opened, and controlling the opening and closing time of the electromagnetic valve, so as to ensure quick reaction and keep the pressure of the liquid hydrogen bottle unchanged.
3) And (4) safety monitoring control: in the operation process of the system, the industrial control station monitors the pressure, the hydrogen concentration and the liquid level condition of the liquid hydrogen bottle in real time, and sends out an alarm signal when the pressure and the liquid level are abnormal or the hydrogen concentration is leaked too high.
In the operation process of the system, the industrial control station monitors the strain of the bottle wall and the temperature condition of the tube wall in real time, when the strain is abnormal or the temperature is abnormal, an alarm signal is sent out, the working condition of the whole process system is observed through the video system of the industrial control station, and when the strain is abnormal or the temperature is abnormal, an engineer manually gives an alarm instruction to trigger the alarm signal.
The ground test method for the vehicle-mounted liquid hydrogen bottle provided by the embodiment of the invention comprises the steps of determining an initial value of liquid hydrogen pressure according to actual working conditions, selecting corresponding electromagnetic valves for combination, controlling a control subsystem to open the corresponding electromagnetic valves to add liquid hydrogen to the liquid hydrogen bottle, and monitoring a liquid hydrogen medium state signal, a liquid hydrogen bottle state signal and a monitoring signal in the liquid hydrogen bottle in real time; and when at least one of the liquid hydrogen medium state signal, the liquid hydrogen bottle state signal and the monitoring signal of the vehicle-mounted liquid hydrogen storage and supply system is abnormal, an alarm signal is sent out. All equipment states and process parameters of the hydrogen supply system can be effectively monitored, automatic control is achieved, all data are stored and historical traceability is achieved, and the whole hydrogen supply system is in a monitorable, visual, safe, reliable and stable running state.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The utility model provides an on-vehicle liquid hydrogen bottle ground test system which characterized in that includes: engineer station, control subsystem, measurement subsystem, safety monitoring subsystem and field sensor, wherein,
the on-site sensor collects a liquid hydrogen medium state signal, a liquid hydrogen bottle state signal and a monitoring signal of the vehicle-mounted liquid hydrogen storage and supply system;
the control subsystem acquires a liquid hydrogen medium state signal, performs data processing on the liquid hydrogen medium state signal by a programmable controller and then sends the liquid hydrogen medium state signal to an engineer station;
the measurement subsystem acquires a liquid hydrogen bottle state signal, monitors the state of the liquid hydrogen bottle and sends the liquid hydrogen bottle to an engineer station;
the safety monitoring subsystem carries out video monitoring and hydrogen safety monitoring on key positions of the vehicle-mounted liquid hydrogen storage and supply system and sends monitoring signals to an engineer station;
and after receiving the liquid hydrogen medium state signal, the liquid hydrogen bottle state signal and the monitoring signal, the engineer station generates a control signal according to a preset safety threshold range corresponding to each signal and sends the control signal to the control subsystem, and the control subsystem adjusts the electromagnetic valve to perform corresponding actions according to the control signal.
2. The on-board liquid hydrogen cylinder ground test system of claim 1, wherein the field sensor comprises: pressure transmitter, temperature transmitter, liquid level transmitter, thermocouple, foil gage, explosion-proof video monitoring device and flammable detector.
3. The ground test system for the vehicle-mounted liquid hydrogen bottle as claimed in claim 1 or 2, wherein the field sensors adopt a two-wire signal transmission mode, and each measuring channel is provided with a power distribution isolator of one channel.
4. The ground test system for the vehicle-mounted liquid hydrogen bottle according to claim 2, wherein the control subsystem acquires pressure, temperature and liquid level signals in the liquid hydrogen bottle, which are respectively acquired by the pressure transmitter, the temperature transmitter and the liquid level transmitter;
the measuring subsystem acquires bottle wall temperature and strain signals of the liquid hydrogen bottle, which are sent by the thermocouple and the strain gauge;
and the safety monitoring subsystem acquires field video monitoring and hydrogen concentration signals respectively sent by the explosion-proof video monitoring device and the combustible detector.
5. The vehicle-mounted liquid hydrogen bottle ground test system according to claim 1,
the engineer station is used for providing a user operation and monitoring interface, recording data in real time in the form of a text file or an electronic form and outputting control quantity and measurement quantity.
6. The vehicle-mounted liquid hydrogen bottle ground test system according to claim 1,
and the vehicle-mounted communication equipment is connected to a vehicle-mounted liquid hydrogen bottle ground test system through a CAN bus intelligent conversion interface card.
7. A ground test method for a vehicle-mounted liquid hydrogen bottle is characterized by comprising the following steps:
determining an initial pressure value of the liquid hydrogen bottle according to actual working conditions, selecting corresponding electromagnetic valves for combination, controlling a subsystem to open the corresponding electromagnetic valves to add liquid hydrogen to the liquid hydrogen bottle, and monitoring a liquid hydrogen medium state signal, a liquid hydrogen bottle state signal and a monitoring signal in the bottle in real time;
and when at least one of the liquid hydrogen medium state signal, the liquid hydrogen bottle state signal and the monitoring signal of the vehicle-mounted liquid hydrogen storage and supply system is abnormal, an alarm signal is sent out.
8. The ground test method for the vehicle-mounted liquid hydrogen bottle according to claim 7,
the liquid hydrogen medium state signal comprises pressure, temperature and liquid level in the liquid hydrogen bottle, and when the liquid level reaches a set value, the electromagnetic valve is controlled to be closed;
and selecting the electromagnetic valve to be vaporized to open according to the difference value between the real-time feedback pressure value and the set value, controlling the opening and closing time of the electromagnetic valve, and keeping the pressure of the bottle unchanged.
9. The ground test method for the vehicle-mounted liquid hydrogen bottle according to claim 8,
the liquid hydrogen bottle state signals comprise: the monitoring signals comprise video monitoring and hydrogen concentration signals; and when at least one of the pressure and the liquid level in the bottle, the strain and the temperature of the bottle wall and the hydrogen concentration is not in the corresponding preset safety threshold range, sending out an alarm signal.
10. The ground test method for the vehicle-mounted liquid hydrogen bottle according to claim 9,
and monitoring the working condition of the whole process system by a video, and when abnormity occurs, acquiring an alarm instruction manually triggered by an engineer and sending an alarm signal.
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Application publication date: 20200918 |