CN115060429A - Gas storage cylinder monitoring system and method and fuel cell automobile - Google Patents
Gas storage cylinder monitoring system and method and fuel cell automobile Download PDFInfo
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- CN115060429A CN115060429A CN202210817398.2A CN202210817398A CN115060429A CN 115060429 A CN115060429 A CN 115060429A CN 202210817398 A CN202210817398 A CN 202210817398A CN 115060429 A CN115060429 A CN 115060429A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 48
- 238000003860 storage Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000446 fuel Substances 0.000 title claims abstract description 12
- 230000005236 sound signal Effects 0.000 claims abstract description 106
- 230000002159 abnormal effect Effects 0.000 claims abstract description 37
- 238000012545 processing Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 18
- 238000001228 spectrum Methods 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 8
- 239000004917 carbon fiber Substances 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 200
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 8
- 230000005856 abnormality Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
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- 238000004804 winding Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 229920003023 plastic Polymers 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/187—Machine fault alarms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
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- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The embodiment of the invention discloses a monitoring system and a monitoring method of a gas cylinder and a fuel cell automobile, wherein the monitoring system comprises the gas cylinder, at least one sound sensor arranged on the gas cylinder and a controller electrically connected with the sound sensor; the sound sensor is used for collecting sound signals generated by the gas storage cylinder and sending the sound signals to the controller; and the controller is used for processing and analyzing the received sound signal to obtain a Mel frequency cepstrum coefficient, comparing the Mel frequency cepstrum coefficient with a preset threshold range, and giving an early warning prompt when the gas storage bottle is judged to be abnormal. The technical scheme provided by the embodiment of the invention realizes real-time monitoring of the gas storage cylinder and improves the safety and reliability of the gas storage cylinder.
Description
Technical Field
The embodiment of the invention relates to the technical field of fuel cell automobiles, in particular to a gas cylinder monitoring system and method and a fuel cell automobile.
Background
At present, the hydrogen storage mode of a vehicle-mounted hydrogen system matched with a fuel cell automobile is mainly high-pressure gaseous hydrogen storage. At present, 35MPa is mainly used for high-pressure gaseous hydrogen storage, and a carbon fiber fully-wound gas cylinder (a type III cylinder) with an aluminum alloy liner is used, but the future development trend is to replace a carbon fiber fully-wound gas cylinder (hereinafter referred to as an IV cylinder) with a plastic liner with higher hydrogen storage density and lower cost by 70 MPa. However, in the gas cylinders with the two inner containers and the carbon fiber winding type, the gas cylinder is deformed in the hydrogen filling process, and if the gas cylinder is seriously deformed, the inner container and the winding layer of the gas cylinder can be torn. In addition, in the daily operation process, the condition such as the gas cylinder inner bag is bloated and the fibre layer debonds also can be caused to long-time high pressure. Meanwhile, the sealing rings at the bottle mouth valve and the bottle tail valve are easy to damage or lose efficacy, so that the problem of large-amount leakage of hydrogen is easily caused, and potential safety hazards exist.
Therefore, timely monitoring whether the gas cylinder is damaged or not or has other abnormalities becomes a problem to be solved urgently at present.
Disclosure of Invention
The invention provides a gas cylinder monitoring system and method and a fuel cell automobile, which are used for realizing real-time monitoring of a gas cylinder and improving the safety and reliability of the gas cylinder.
In a first aspect, an embodiment of the present invention provides a monitoring system for a gas cylinder, including a gas cylinder, at least one sound sensor mounted on the gas cylinder, and a controller electrically connected to the sound sensor;
the sound sensor is used for collecting sound signals generated by the gas storage cylinder and sending the sound signals to the controller;
the controller is used for processing and analyzing the received sound signal to obtain a Mel frequency cepstrum coefficient, comparing the Mel frequency cepstrum coefficient with a preset threshold range, and giving an early warning prompt when the gas storage bottle is judged to be abnormal.
In a second aspect, embodiments of the present invention provide a method for monitoring a gas cylinder, where the gas cylinder includes a body and at least one sound sensor mounted on the body, and the sound sensor is electrically connected to a controller; the method comprises the following steps:
the sound sensor collects sound signals generated by the gas storage cylinder and sends the sound signals to the controller;
and the controller processes and analyzes the received sound signal to obtain a Mel frequency cepstrum coefficient, compares the Mel frequency cepstrum coefficient with a preset threshold range, and gives an early warning prompt when the gas storage bottle is judged to be abnormal.
In a third aspect, an embodiment of the present invention further provides a fuel cell vehicle, including the gas cylinder monitoring system according to the first aspect.
According to the technical scheme of the embodiment of the invention, the sound signal generated by the gas storage cylinder is collected in real time through at least one sound sensor on the gas storage cylinder and is sent to the controller, then the controller processes and analyzes the sound signal to obtain the Mel frequency cepstrum coefficient, the Mel frequency cepstrum coefficient is compared with a preset threshold range to judge whether the gas storage cylinder is abnormal or not, and early warning prompt is carried out when the gas storage cylinder is judged to be abnormal, so that the real-time monitoring on the gas storage cylinder is realized, whether the gas storage cylinder is abnormal or not can be timely carried out, the occurrence of safety accidents is avoided, and the intelligent level and the reliability of a gas storage cylinder monitoring system are improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a monitoring system for a gas cylinder according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another monitoring system for a gas cylinder according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a monitoring system for a gas cylinder according to another embodiment of the present invention;
fig. 4 is a flowchart of a method for monitoring a gas cylinder according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a gas cylinder monitoring system according to an embodiment of the present invention, as shown in fig. 1, the gas cylinder monitoring system includes a gas cylinder 10, at least one sound sensor 20 mounted on the gas cylinder 10, and a controller 30 electrically connected to the sound sensor 20; the sound sensor 20 is used for collecting sound signals generated by the gas storage cylinder 10 and sending the sound signals to the controller 30; and the controller 30 is used for processing and analyzing the received sound signal to obtain a mel-frequency cepstrum coefficient, comparing the mel-frequency cepstrum coefficient with a preset threshold range, and giving an early warning prompt when the gas storage bottle 10 is judged to be abnormal.
It is understood that the gas stored in the gas cylinder 10 may be hydrogen or other gases, and the embodiment of the invention is not limited thereto. The gas cylinder 10 includes, but is not limited to, a single-port cylinder or a double-port cylinder, fig. 1 only exemplarily shows that the gas cylinder is a double-port cylinder, that is, two port valves, namely, a port valve 12 and a tail valve 13, are provided, and further, the embodiment of the present invention does not specifically limit the specific shape, material and pressure specification of the gas cylinder 10.
The acoustic sensor 20 includes, but is not limited to, a microphone, and the acoustic sensor 20 is generally divided into three different types, i.e., a piezoelectric ceramic type, a capacitive type, and a magnetoelectric type, according to different materials, which can be selected according to actual requirements, and the embodiment of the present invention does not limit the types. Preferably, the sound sensor 20 may be a mems microphone, which has sensitivity that is not affected by temperature, vibration, and humidity, has high stability, and consumes less power.
Specifically, gas bomb 10 is a bottle column structure that is used for carrying out gaseous injection, storage and supply, seal structure (for example O type circle) is in order to avoid taking place gas leakage after bottle mouth department sets up usually, there is certain roughness when seal structure's terminal surface, will cause gas leakage scheduling problem when the cleanliness is not up to standard or warp, and simultaneously, because the inner bag material of gas bomb 10 is mostly aluminium alloy inner bag carbon fiber or plastics inner bag carbon fiber etc. the in-process that gas injected into receives the influence of pressure easily and takes place the condition such as deformation, make gas bomb 10 have taken place the damage, thereby influence the reliability and the security of gas bomb. Thus, at least one sound sensor 20 is installed on the gas cylinder 10, the sound sensor 20 is used for detecting the state of the gas cylinder 10 in real time, collecting the sound signal generated by the gas cylinder 10 and sending the sound signal to the controller 30, so that the controller 30 can perform further processing and analysis to determine whether the gas cylinder 10 is abnormal or not. Because the sound signal is usually a time domain signal, after the sound signal is obtained, the controller 30 can further process and analyze the sound signal to obtain a mel-frequency cepstrum coefficient, then compare the mel-frequency cepstrum coefficient with a preset threshold range, further judge whether the gas cylinder 10 is abnormal according to the relationship between the mel-frequency cepstrum coefficient and the preset threshold range, and timely give an early warning prompt when judging that the gas cylinder 10 is abnormal, so that a user can timely overhaul the gas cylinder, safety accidents are avoided, and the reliability and safety of the gas cylinder are ensured.
The preset threshold range is a threshold range set in advance by the controller 10, and the corresponding preset threshold ranges may also be different according to different abnormal phenomena of the gas cylinder 10, for example, a developer may generate all sound signals that may be generated by the gas cylinder 10 under different abnormal conditions in a simulation test manner, which may be referred to as sample sound signals, the sample sound signals are obtained by the controller 30, and then are processed and analyzed to obtain corresponding mel-frequency cepstrum coefficients, the preset threshold range is formed by using the mel-frequency cepstrum coefficients corresponding to all the sample sound signals, and the preset threshold range is stored in the controller 30.
It should be noted that, the manner of the early warning prompt performed by the controller 30 includes, but is not limited to, an audio prompt or an icon prompt, and the present invention does not limit this manner in real time.
According to the embodiment of the invention, the sound signal generated by the gas cylinder is collected in real time through at least one sound sensor on the gas cylinder and is sent to the controller, then the controller processes and analyzes the sound signal to obtain the Mel frequency cepstrum coefficient, the Mel frequency cepstrum coefficient is compared with the preset threshold range to judge whether the gas cylinder is abnormal or not, and the early warning prompt is carried out when the gas cylinder is judged to be abnormal, so that the real-time monitoring on the gas cylinder is realized, the abnormal phenomenon of the gas cylinder can be timely generated, the occurrence of safety accidents is avoided, and the intelligent level and the reliability of the gas cylinder monitoring system are improved.
Optionally, fig. 2 is a schematic structural diagram of another gas cylinder monitoring system according to an embodiment of the present invention, and as shown in fig. 1 and fig. 2, a gas cylinder 10 includes a cylinder body 11, and a neck valve 12 and a tail valve 13 located at two ends of the cylinder body 11; the sound sensor 20 comprises a first sound sensor 21 positioned on the bottle body 11 close to the bottleneck valve 12, a second sound sensor 22 positioned on the bottle body 11 close to the bottleneck valve 13, and a third sound sensor 23 and a fourth sound sensor 24 positioned in the middle of the bottle body 11, wherein the planes of the third sound sensor 23 and the fourth sound sensor 24 are vertical to the axis of the bottleneck valve 12 and the bottleneck valve 13, and the third sound sensor 23 and the fourth sound sensor 24 are respectively positioned at opposite positions on two sides of the axis of the bottleneck valve 12 and the bottleneck valve 13; the plane of the third acoustic sensor 23 and the fourth acoustic sensor 24 and the plane of the axis divide the cylinder 10 into four regions, a first region S1 adjacent to the finish valve 12 and the third acoustic sensor 23, a second region S2 adjacent to the finish valve 13 and the third acoustic sensor 23, a third region S3 adjacent to the finish valve 12 and the fourth acoustic sensor 24, and a fourth region S4 adjacent to the finish valve 13 and the fourth acoustic sensor 24.
It can be understood that the gas injection and gas supply through the gas cylinder 10 need to pass through the mouth valve 12, the specific structure of the mouth valve 12 is not limited in the embodiment of the present invention, and the mouth valve 12 can control the gas with different flow rates to be injected or supplied. Sealing structures (not shown) such as O-rings are usually provided between the neck valve 12 and the end valve 13 and the bottle body 11 to prevent gas leakage.
Specifically, because the gas bomb 10 takes place gas leakage usually is in bottleneck valve 12 or end of a bottle valve 13 position department, the sound production of simultaneously having released, or, also can produce certain sound when injecting into and supplying gas, so, through setting up sound sensor 20 in bottleneck valve 12 and end of a bottle valve 13 position department respectively, the sound that can gather gas bomb 10 in real time produces, carry out further processing analysis by controller 30, with whether take place gas leakage in order to judge gas bomb 10 fast, accurately, or, whether gas injection or supply exist unusually, thereby avoid taking place the incident. In addition, still set up third sound transducer 23 and fourth sound transducer 24 and come whether the real-time supervision bottle 11 takes place the damage and produce the abnormal sound at the intermediate position department of bottle 11, further improve the comprehensive monitoring to gas bomb 10, guarantee the security of gas bomb 10. Because the gas bomb 10 any position all probably has the damage, and abnormal sound can be gathered to a plurality of sound sensor 20 homoenergetic, consequently, distribute a plurality of sound sensor 20 and set up in the different positions department of bottle 11, can make controller 20 can further confirm specific bottle damage position according to the time difference that a plurality of sound sensor 20 monitored sound signal, improve monitoring system to the unusual accurate location level of gas bomb 10, guarantee the reliability and the security of gas bomb 10.
It should be noted that, in the embodiment of the present invention, the acoustic sensors 20 are not limited to the four acoustic sensors 20 shown in fig. 2, and 6, 8 or more acoustic sensors may also be provided to divide the gas cylinder 10 into more regions, so as to perform more precise positioning on the damaged position of the cylinder, and a person skilled in the art may adjust and set the number and the position of the acoustic sensors 20 at will according to actual situations, which is not specifically limited in the embodiment of the present invention.
Optionally, with continued reference to fig. 2, the preset threshold range includes a first threshold range, and the first threshold range is formed by a first mel-frequency cepstrum coefficient obtained by processing and analyzing a first sample sound signal, where the first sample sound signal includes a bottle liner bulge abnormal sound, a bottle body fracture abnormal sound, a bottle body carbon fiber debonding abnormal sound, and a bottle body tearing abnormal sound; the controller 30 is configured to obtain sound signals collected by the first sound sensor 21, the second sound sensor 22, the third sound sensor 23, or the fourth sound sensor 24, perform processing analysis to obtain mel-frequency cepstrum coefficients, compare the mel-frequency cepstrum coefficients with a first threshold range, and perform early warning on bottle damage when it is determined that the mel-frequency cepstrum coefficients are within the first threshold range and the duration time exceeds a first preset time.
It can be understood that, the first threshold range is determined by analyzing and processing various possible bottle abnormal sound signals such as the bottle inner container bulge abnormal sound, the bottle breakage abnormal sound, the bottle carbon fiber debonding abnormal sound and the bottle tearing abnormal sound which are obtained by the controller 30 in advance through a simulation test and the like, and it can be understood that the more the types of the sound signals included in the first sample sound signals are, the larger the corresponding first threshold range is, so that the more the monitoring system is favorable for accurately and quickly determining whether the bottle 11 is damaged.
Specifically, when the bottle body 11 is damaged, all the sound sensors 20 can detect the sound signal generated by the bottle body 11, the controller 30 may only process and analyze the sound signal acquired by any one of the sound sensors 20 to obtain a mel-frequency cepstrum coefficient, then compare the mel-frequency cepstrum coefficient with a first threshold range to determine whether the mel-frequency cepstrum coefficient is within the first threshold range, if the mel-frequency cepstrum coefficient is within the first threshold range, it indicates that the sound signal acquired by the sound sensor 20 is the same as one of the sound signals in the first sample sound signal, where the same may be considered as having the same frequency characteristic or loudness, and if the duration exceeds a first preset time, it indicates that the bottle body 11 of the gas storage bottle 10 may be damaged or otherwise abnormal, and informs the user through an early warning, for timely inspection and maintenance.
The first preset time may be any time length, for example, 2s or 5s, which is not specifically limited in this embodiment of the present invention and may be selectively set according to an actual situation. The first preset time is set as one of the judgment conditions for whether the bottle body 11 is damaged or not, so that the misjudgment of the controller 30 caused by other sound interference can be avoided, and the reliability and the accuracy of the monitoring system are further improved.
Optionally, with continued reference to fig. 2, controller 30 is further configured to record times T1, T2, T3 and T4 at which the sound signals collected by first sound transducer 21, second sound transducer 22, third sound transducer 23 and fourth sound transducer 24 are received, respectively, and determine a location of the damage to bottle 11 according to the relationships of T1, T2, T3 and T4, wherein the location of the damage to bottle 11 is located in first region S1 when T1 < T2 and T3 < T4, the location of the damage to bottle 11 is located in second region S2 when T1 > T2 and T3 < T4, the location of the damage to bottle 11 is located in third region S3 when T1 < T2 and T3 > T4, and the location of the damage to bottle 11 is located in fourth region S4 when T1 > T2 and T3 > T4.
Specifically, since the distances from the sound sensors 20 to the position where the bottle 11 is damaged may be different, the time for acquiring the sound signals may be asynchronous, that is, the farther the sound sensor 20 is from the position where the bottle 11 is damaged, the later the time for acquiring the sound signals, so that the later the time for acquiring the sound signals acquired by the sound sensor 20 is, that is, the larger the recorded time value T is. In this way, the controller 30 may record the times of acquiring the sound signals collected by the different sound sensors 20, and then perform the specific damage location positioning according to the magnitude relationship of the times corresponding to the different sound sensors.
Illustratively, if the bottle body of the gas cylinder 10 is damaged at the position a and generates abnormal sound, the controller 30 is further configured to record the times T1, T2, T3 and T4 of receiving the sound signals collected by the first sound sensor 21, the second sound sensor 22, the third sound sensor 23 and the fourth sound sensor 24 respectively, since the first sound sensor 21 is closer to the position a than the second sound sensor 22 along the direction of the axis of the mouthpiece valve 12 and the end-of-bottle valve 13, there is T1 < T2, and there is T3 > T4 along the direction of the straight line of the third sound sensor 23 and the fourth sound sensor 24, so that the controller 30 can determine that the position where the bottle body 11 is possibly damaged is located at the third region S3 according to the relationship that T1 < T2 and T3 > T4, so that the user can check the third region S3, quickly locate the damaged position of the bottle body 11, and perform maintenance, the occurrence of safety accidents is avoided, and the reliability and the safety of the gas storage cylinder 10 are ensured.
Optionally, with reference to fig. 2, the preset threshold range includes a second threshold range, where the second threshold range is formed by a second mel-frequency cepstrum coefficient obtained by processing and analyzing a second sample sound signal, where the second sample sound signal includes a release sound generated when the gas bomb 10 releases zero flow gas to any flow gas in the first flow gas, and the first flow is a leakage flow of the gas when the bottle mouth valve 12 or the bottle tail valve 13 is completely failed and the gas bomb 10 is at the maximum pressure; the controller 20 is configured to obtain sound signals collected by the first sound sensor 21 and/or the second sound sensor 22, perform processing analysis to obtain corresponding mel-frequency cepstrum coefficients, compare the mel-frequency cepstrum coefficients with a second threshold range, perform gas leakage early warning prompt when it is determined that the mel-frequency cepstrum coefficients are within the second threshold range and the duration time exceeds a second preset time, and determine a gas leakage position of the gas bomb 10 according to the sound sensor 20 corresponding to the received sound signals.
It can be understood that the second threshold range is determined by analyzing and processing the release sound generated when the controller 30 obtains in advance through a simulation test or the like that the gas bomb 10 leaks zero flow gas to any flow gas in the first flow gas, and it can be understood that the more types of the sound signals included in the second sample sound signal, the larger the corresponding second threshold range will be, thereby being more beneficial to the monitoring system to accurately and quickly determine whether the gas bomb 10 leaks. The first flow rate is a leakage flow rate of the gas when the neck valve 12 or the tail valve 13 is completely failed and the gas cylinder 10 is at the maximum pressure, and the maximum pressure of the gas cylinder may also be different, for example, 35MPa or 70MPa, according to different specifications of the gas cylinder 10.
In particular, the gas cylinder 10 usually has gas leakage at the mouth valve 12 or the tail valve 13, and at this time, the first sound sensor 21 located at the bottleneck valve 12 or the second sound sensor 22 located at the end of bottle valve 13 will collect the sound signals generated when the gas leaks from the bottleneck valve 12 or the end of bottle valve 13 at the first time, the controller 30 can process and analyze the sound signals collected by the first sound sensor 21 and/or the second sound sensor 22 to obtain the corresponding mel-frequency cepstrum coefficient, and compare the mel-frequency cepstrum coefficient with the second threshold range, to determine whether the mel-frequency cepstrum coefficient is within the second threshold range, in this case, if the mel-frequency cepstrum coefficient obtained by processing and analyzing the sound signal collected by the first sound sensor 21 is within the second threshold range, if the duration time exceeds the second preset time, the phenomenon that gas leakage possibly exists at the position of the bottleneck valve 12 is illustrated; if the mel frequency cepstrum coefficient obtained by processing and analyzing the sound signal collected by the second sound sensor 22 is within the second threshold range and the duration time exceeds the second preset time, the phenomenon that gas leaks at the tail valve 13 is illustrated; if two mel frequency cepstrum coefficients obtained by processing and analyzing the sound signals collected by the first sound sensor 21 and the second sound sensor 22 are within the range of the second threshold value and the duration time exceeds the second preset time, it is indicated that the gas leakage phenomenon possibly exists at the bottleneck valve 12 and the tail valve 13, the controller 30 immediately carries out early warning prompt to inform a user of checking and maintaining, the safety of the gas storage bottle 10 is ensured, and the safety accident is avoided.
The second preset time may be any time duration, for example, 2s or 5s, which is not specifically limited in this embodiment of the present invention and may be selectively set according to an actual situation. The second preset time is set as one of the judgment conditions for judging whether the gas leakage occurs in the mouth valve 12 or the tail valve 13 of the gas storage bottle 10, so that the misjudgment of the controller 30 caused by other sound interference can be avoided, and the reliability and the accuracy of the monitoring system are further improved.
Optionally, with continued reference to fig. 2, the preset threshold range includes a third threshold range, where the third threshold range is formed by a third mel-frequency cepstrum coefficient obtained by processing and analyzing a third sample sound signal, where the third sample sound signal includes an injection sound generated at any pressure from standard atmospheric pressure to maximum pressure in the gas cylinder 10 when the gas cylinder is injected with gas; the controller 30 is configured to acquire a sound signal acquired by the first sound sensor 1 during gas injection in the gas bomb 10, process and analyze the acquired mel-frequency cepstrum coefficient, compare the mel-frequency cepstrum coefficient with a third threshold range, and perform gas injection abnormality warning when it is determined that the mel-frequency cepstrum coefficient exceeds the third threshold range and the duration time exceeds a third preset time.
It can be understood that the third threshold range is determined by analyzing and processing the injection sound generated by the controller 30 in any pressure from the standard atmospheric pressure to the maximum pressure when the gas cylinder 10 injects gas by obtaining the injection sound generated by the cylinder pressure from the standard atmospheric pressure to the maximum pressure in advance through a simulation test or the like, and it can be understood that the more types of the sound signals included in the third sample sound signal, the larger the corresponding third threshold range will be, thereby facilitating the monitoring system to accurately and quickly determine whether the gas cylinder 10 injects gas normally. The standard atmospheric pressure is 0.1MPa, and the maximum pressure value is related to the specification of the gas cylinder 10, for example, 35MPa or 70MPa, which is not specifically limited in the embodiment of the present invention and can be set according to the actual situation.
Specifically, when gas is injected into the gas cylinder 10, a corresponding pipe is usually connected to the port valve 12 for gas delivery. It will be appreciated that, when gas injection is performed, the generated gas injection sound will also be different according to the pressure in the gas cylinder 10 at the time, and the sound signal at the cylinder mouth valve 12 can be collected by the first sound sensor 21 at the cylinder mouth valve 12 and then sent to the controller 30, and the mel-frequency cepstrum coefficient can be processed and analyzed by the controller 30 to obtain the mel-frequency cepstrum coefficient, and compared with the third threshold range to determine whether the mel-frequency cepstrum coefficient exceeds the third threshold range. It can be understood that if the mel frequency cepstrum coefficient obtained by processing and analyzing the sound signal collected by the first sound sensor 21 exceeds the third threshold range, it indicates that the sound signal generated when the gas cylinder 10 performs gas injection is abnormal, and further, if the duration of the mel frequency cepstrum coefficient exceeding the third threshold range exceeds a third preset time, it may be determined that the gas cylinder 10 performs gas injection abnormality, and immediately perform a gas injection abnormality early warning prompt to inform the user to immediately stop the operation of gas injection, perform inspection and maintenance, and avoid safety accidents.
The third preset time may be any time duration, for example, 2s or 5s, which is not specifically limited in this embodiment of the present invention and may be selectively set according to an actual situation. By setting the third preset time as one of the conditions for determining whether the gas injection of the gas bomb 10 is normal, the misjudgment of the controller 30 caused by other sound interference can be avoided, and the reliability and accuracy of the monitoring system are further improved.
Optionally, fig. 3 is a schematic structural diagram of a monitoring system for a gas cylinder according to an embodiment of the present invention, and as shown in fig. 3, the monitoring system further includes a battery device 50 and a gas supply pipe 40 connected between the battery device 50 and the mouth valve 12 of the gas cylinder 10; the preset threshold range includes a fourth threshold range, and the fourth threshold range is formed by a fourth mel-frequency cepstrum coefficient obtained by processing and analyzing a fourth sample sound signal, wherein the fourth sample sound signal includes gas supply sound generated when the gas bomb 10 supplies gas with any flow rate higher than the second flow rate of gas, and the second flow rate is the maximum gas flow rate required by the normal operation of the battery device 50; the controller 30 is configured to obtain a sound signal acquired by the first sound sensor 21 during a gas supply process of the gas bomb 10, process and analyze the obtained mel-frequency cepstrum coefficient, compare the mel-frequency cepstrum coefficient with a fourth threshold range, perform a gas supply abnormality early warning prompt when it is determined that the mel-frequency cepstrum coefficient is within the fourth threshold range and the duration exceeds a fourth preset time, and control the closing of the bottleneck valve 12 of the gas bomb 10.
Wherein the battery device 50 comprises a fuel cell.
It can be understood that the fourth threshold range is determined by analyzing and processing the gas supply sound generated when the controller 30 obtains the gas cylinder 10 in advance through a simulation test or the like when supplying any gas flow higher than the second gas flow, and it can be understood that the more types of the sound signals included in the fourth sample sound signal, the larger the corresponding fourth threshold range will be, so as to be more beneficial for the monitoring system to accurately and quickly determine whether the gas supply of the gas cylinder 10 is normal. The second flow rate is a maximum gas flow rate required by the battery device 50 when the battery device operates normally, and corresponding values of the second flow rate may be different according to different operating characteristics of specific batteries.
Specifically, when the gas cylinder 10 is supplied with gas, the gas in the cylinder is delivered to the battery device 50 through the cylinder mouth valve 12 and the gas supply pipe 40 in order. It will be appreciated that the gas cylinder 10 will normally produce different sounds due to different gas flow rates passing through the bottleneck valve 12 when supplying gas, and at this time, the sound signal at the bottleneck valve 12 can be collected by the first sound sensor 21 at the bottleneck valve 12 and then sent to the controller 30, and the mel-frequency cepstrum coefficient can be obtained by processing and analyzing the signal by the controller 30 and compared with the fourth threshold range to determine whether the mel-frequency cepstrum coefficient is within the fourth threshold range. It can be understood that, if the mel-frequency cepstrum coefficient obtained by processing and analyzing the sound signal collected by the first sound sensor 21 is within the fourth threshold range, it indicates that the flow rate of the gas passing through the mouth valve 12 of the gas bomb 10 is greater than the maximum gas flow rate required by the normal operation of the battery device 50, and further indicates that there is a gas leakage in the gas supply pipeline 40 or the battery device 50, so that the flow rate of the gas supplied by the gas bomb 10 exceeds the maximum gas flow rate required by the normal operation of the battery device 50. Further, if the duration that the mel-frequency cepstrum coefficient exceeds the third threshold range exceeds the fourth preset time, the gas supply abnormality of the gas cylinder 10 can be judged, the early warning prompt of the gas supply abnormality is immediately carried out, and meanwhile, the bottle mouth valve 12 of the gas cylinder 10 is controlled to be closed to inform a user of stopping the operation of the gas supply immediately, so that the inspection and the maintenance are carried out, and the safety accident is avoided.
The fourth preset time may be any time duration, for example, 2s or 5s, which is not specifically limited in this embodiment of the present invention and may be selectively set according to an actual situation. By setting the fourth preset time as one of the conditions for determining whether the gas supply of the gas bomb 10 is normal, the misjudgment of the controller 30 caused by other sound interference can be avoided, and the reliability and accuracy of the monitoring system can be further improved.
Optionally, on the basis of any of the above embodiments, the controller 30 is configured to pre-process the received sound signal to obtain a first sound signal, convert the first sound signal into a frequency domain signal, convert the frequency domain signal into a mel-frequency spectrum, and calculate a mel-frequency cepstrum coefficient according to the mel-frequency spectrum.
Specifically, the controller 30 performs a pre-processing on the received sound signal to obtain a first sound signal, wherein the pre-processing includes performing a pre-emphasis, framing, and windowing on the sound signal, and as can be understood, the pre-emphasis refers to passing the sound signal through a high-pass filter, the framing refers to sampling the sound signal, collecting a plurality of sampling points to form a frame signal, and the windowing refers to substituting each frame signal into a window function to eliminate signal discontinuity that may be caused at two ends of each frame. And then carrying out fast Fourier transform on the first signal to obtain a corresponding frequency domain signal, converting the frequency domain signal into a Mel frequency spectrum after the frequency domain signal is processed by a Mel triangular filter bank, and finally carrying out cepstrum analysis on the Mel frequency spectrum to obtain a Mel frequency cepstrum coefficient, wherein the cepstrum analysis comprises the steps of firstly carrying out logarithm on a fundamental frequency self-adaptive Mel energy spectrum to obtain a logarithmic energy spectrum, and then carrying out discrete cosine transform on the logarithmic energy spectrum.
Based on the same inventive concept, an embodiment of the present invention further provides a gas cylinder monitoring method, fig. 4 is a flowchart of the gas cylinder monitoring method provided in the embodiment of the present invention, and as shown in fig. 1 and 4, a gas cylinder 10 includes a body and at least one sound sensor 20 mounted on the body, and the sound sensor 20 is electrically connected to a controller 30; the method comprises the following steps:
s101, a sound sensor collects sound signals generated by the gas storage cylinder and sends the sound signals to a controller.
S102, the controller processes and analyzes the received sound signals to obtain a Mel frequency cepstrum coefficient, compares the Mel frequency cepstrum coefficient with a preset threshold range, and gives an early warning prompt when the gas storage bottle is judged to be abnormal.
In this embodiment, sound signal that the gas bomb produced is gathered in real time and is sent the controller through at least one sound sensor on the gas bomb, then carry out processing analysis by the controller and obtain mel frequency cepstrum coefficient, and compare mel frequency cepstrum coefficient and preset threshold value scope, with judge whether there is the gas bomb unusual, and carry out the early warning suggestion when judging the gas bomb is unusual, realize the real-time supervision to the gas bomb, can in time take place whether there is the abnormal phenomenon in the gas bomb, avoid the emergence of incident, thereby improve gas bomb monitoring system's intelligent level and reliability.
Based on the same inventive concept, the embodiment of the invention also provides a fuel cell automobile, which comprises the gas cylinder monitoring system in any embodiment. The embodiment of the invention provides all technical characteristics of a monitoring system with a gas storage cylinder for a fuel cell automobile, and can bring about the same technical effects, and the details are not repeated herein, and specific reference can be made to the description in the above embodiment.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A monitoring system of a gas cylinder is characterized by comprising the gas cylinder, at least one sound sensor arranged on the gas cylinder, and a controller electrically connected with the sound sensor;
the sound sensor is used for collecting sound signals generated by the gas storage cylinder and sending the sound signals to the controller;
the controller is used for processing and analyzing the received sound signal to obtain a Mel frequency cepstrum coefficient, comparing the Mel frequency cepstrum coefficient with a preset threshold range, and giving an early warning prompt when the gas storage bottle is judged to be abnormal.
2. The system for monitoring a gas cylinder as set forth in claim 1, wherein the gas cylinder comprises a body and a mouth valve and a tail valve at both ends of the body;
the sound sensor comprises a first sound sensor positioned at the position, close to the bottleneck valve, of the bottle body, a second sound sensor positioned at the position, close to the bottleneck valve, of the bottle body, and a third sound sensor and a fourth sound sensor positioned at the middle position of the bottle body, wherein the plane where the third sound sensor and the fourth sound sensor are positioned is vertical to the axis where the bottleneck valve and the bottleneck valve are positioned, and the third sound sensor and the fourth sound sensor are respectively positioned at the opposite positions at the two sides of the axis where the bottleneck valve and the bottleneck valve are positioned;
the third sound sensor and the plane where the fourth sound sensor is located and the plane where the axis is located are used for dividing the gas storage cylinder into four areas, namely the area close to the bottleneck valve and the first area of the third sound sensor, the area close to the bottleneck valve and the second area of the third sound sensor, the area close to the bottleneck valve and the third area of the fourth sound sensor and the area close to the bottleneck valve and the fourth area of the fourth sound sensor.
3. The system for monitoring a gas cylinder according to claim 2, wherein the preset threshold range comprises a first threshold range, the first threshold range is composed of a first mel frequency cepstrum coefficient obtained by processing and analyzing a first sample sound signal, wherein the first sample sound signal comprises a bottle body inner container bulge abnormal sound, a bottle body rupture abnormal sound, a bottle body carbon fiber debonding abnormal sound and a bottle body tearing abnormal sound;
the controller is used for acquiring sound signals collected by the first sound sensor, the second sound sensor, the third sound sensor or the fourth sound sensor, processing and analyzing the sound signals to obtain a Mel frequency cepstrum coefficient, comparing the Mel frequency cepstrum coefficient with the first threshold range, and performing early warning prompt on bottle body damage when the Mel frequency cepstrum coefficient is judged to be within the first threshold range and the duration time exceeds first preset time.
4. The system for monitoring a gas cylinder according to claim 3, wherein the controller is further configured to record times T1, T2, T3 and T4 at which the sound signals collected by the first sound sensor, the second sound sensor, the third sound sensor and the fourth sound sensor are received, respectively, and determine the location of the bottle damage according to the relationship of T1, T2, T3 and T4, wherein the location of the bottle damage is located in the first region when T1 < T2 and T3 < T4, the location of the bottle damage is located in the second region when T1 > T2 and T3 < T4, the location of the bottle damage is located in the third region when T1 < T2 and T3 > T4, and the location of the bottle damage is located in the fourth region when T1 > T2 and T3 > T4.
5. The system of claim 2, wherein the predetermined threshold range comprises a second threshold range, and the second threshold range is formed by a second mel-frequency cepstrum coefficient obtained by processing and analyzing a second sample sound signal, wherein the second sample sound signal comprises a leakage sound generated when the gas cylinder leaks zero flow gas to any flow of gas in a first flow of gas, and the first flow is a leakage flow of gas when the cylinder head valve or the cylinder tail valve is completely failed and the gas cylinder is at a maximum pressure;
the controller is used for acquiring sound signals collected by the first sound sensor and/or the second sound sensor, processing and analyzing the sound signals to obtain corresponding mel frequency cepstrum coefficients, comparing the mel frequency cepstrum coefficients with a second threshold range, performing gas leakage early warning prompt when the mel frequency cepstrum coefficients are judged to be located in the second threshold range and the duration time exceeds a second preset time, and determining the gas leakage position of the gas storage bottle according to the sound sensors corresponding to the received sound signals.
6. The system of claim 2, wherein the predetermined threshold range comprises a third threshold range, the third threshold range is composed of a third mel-frequency cepstrum coefficient obtained by processing and analyzing a third sample sound signal, wherein the third sample sound signal comprises an injection sound generated by the gas cylinder at any pressure from a standard atmospheric pressure to a maximum pressure when the gas cylinder is injected with gas;
the controller is used for acquiring sound signals collected by the first sound sensor in the gas storage bottle gas injection process, processing and analyzing the acquired Mel frequency cepstrum coefficient, comparing the Mel frequency cepstrum coefficient with the third threshold range, and performing gas injection abnormity early warning prompt when the Mel frequency cepstrum coefficient is judged to exceed the third threshold range and the duration time exceeds the third preset time.
7. The gas cylinder monitoring system of claim 2, further comprising a battery device and a gas supply line connected between the battery device and a finish valve of the gas cylinder;
the preset threshold range comprises a fourth threshold range, the fourth threshold range is formed by a fourth mel-frequency cepstrum coefficient obtained by processing and analyzing a fourth sample sound signal, wherein the fourth sample sound signal comprises gas supply sound generated when the gas bomb supplies gas with any flow rate higher than a second flow rate of gas, and the second flow rate is the maximum gas flow rate required by the normal operation of the battery equipment;
the controller is used for acquiring the sound signals collected by the first sound sensor in the gas supply process of the gas storage bottle, processing and analyzing the acquired Mel frequency cepstrum coefficient, comparing the Mel frequency cepstrum coefficient with the fourth threshold range, and performing gas supply abnormity early warning prompt and controlling the closing of a bottle opening valve of the gas storage bottle when the Mel frequency cepstrum coefficient is judged to be within the fourth threshold range and the duration time exceeds the fourth preset time.
8. The system of claim 1, wherein the controller is configured to pre-process the received sound signal to obtain a first sound signal, convert the first sound signal into a frequency domain signal, convert the frequency domain signal into a mel-frequency spectrum, and calculate a mel-frequency cepstrum coefficient according to the mel-frequency spectrum.
9. The monitoring method of the gas cylinder is characterized in that the gas cylinder comprises a body and at least one sound sensor arranged on the body, and the sound sensor is electrically connected with a controller; the method comprises the following steps:
the sound sensor collects sound signals generated by the gas storage cylinder and sends the sound signals to the controller;
and the controller processes and analyzes the received sound signal to obtain a Mel frequency cepstrum coefficient, compares the Mel frequency cepstrum coefficient with a preset threshold range, and gives an early warning prompt when the gas storage bottle is judged to be abnormal.
10. A fuel cell vehicle comprising a gas cylinder monitoring system according to any one of claims 1 to 8.
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