CN113060068B - Electric vehicle chassis collision protection and alarm system - Google Patents
Electric vehicle chassis collision protection and alarm system Download PDFInfo
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- CN113060068B CN113060068B CN202110429831.0A CN202110429831A CN113060068B CN 113060068 B CN113060068 B CN 113060068B CN 202110429831 A CN202110429831 A CN 202110429831A CN 113060068 B CN113060068 B CN 113060068B
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- chassis
- optical fiber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
- B60Q9/008—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling for anti-collision purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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Abstract
The invention relates to a collision protection and alarm system for an electric vehicle chassis, which comprises: microbend fiber sensors, a microprocessor and an ECU. The optical signal obtained by the microbend optical fiber sensor is used for sensing whether the chassis and the battery box body deform or not. The microprocessor converts the optical signal changes into electrical signal changes and calculates the rate of change of the electrical signals. And the ECU judges the change rate of the electric signal according to a preset threshold value, thereby finishing the evaluation of the deformation degree of the chassis and the battery box body and controlling related devices to process. Based on the structure, the invention can effectively warn a driver in time and adopt different coping strategies, and can more timely and rapidly evaluate the collision strength of the chassis aiming at the existing protection strategy of additionally arranging a chassis protection structure, remind the driver to adopt reasonable coping measures and avoid serious accidents such as vehicle combustion and the like caused by excessive damage of the battery box body.
Description
Technical Field
The invention relates to the technical field of automobile part protection, in particular to a collision protection and alarm system for an electric vehicle chassis.
Background
The development of electric vehicles is a necessary measure for coping with energy failure and climate change and promoting sustainable development. Based on the consideration of endurance mileage, safety performance and driving experience, the electric vehicle usually chooses to place the battery in an integrated manner (a slide plate type) at the bottom of the vehicle body, and for example, tesla, bidi, leolai ES6 and the like all adopt an integrated design of a chassis and a battery pack. Nevertheless receive sharp-pointed object impact in the vehicle driving process chassis, the power battery box of arranging the chassis in very easily receives the extrusion and appears the damage even, and then extrudees inside electric core shell for inside electrolyte or electric core appear damaging, serious collide with can make inside electric core appear the short circuit, electrolyte flow is not smooth even appearing, leak the scheduling problem, cause the inside short circuit of battery, if do not carry out effective warning to the driver when the collision takes place, continue to keep the state of traveling and very easily cause the vehicle accident of burning.
The protection of vehicle chassis adopts the measure of installing the guard plate additional on the chassis usually, for example patent CN201510024725 discloses a chassis and the vehicle that has this chassis that has protector, this chassis includes chassis body and protector, the equidistant slide rail that is provided with on the chassis body, and every slide rail includes main part and the flexion that forms by this main part one end extension, the flexion is close to the locomotive position of vehicle, protector includes guard plate and a plurality of gyro wheel, what each gyro wheel can be movable accepts on corresponding slide rail, connect the guard plate activity in two corresponding slide rails, and the guard plate can be in the same place with the flexion is installed, when the guard plate receives the foreign matter collision, can move for the chassis body, thereby reduce the impact force of foreign matter to the chassis, reduce the chassis and be impaled or by the extrusion deformation's probability.
Patent CN201810844145 discloses a reinforced automobile chassis, wherein a seat rod clamp is added at the upper end of a connecting rod, the seat rod clamp can adjust the height of the chassis from the ground through the connecting rod under the action of a bolt, and a spiral spring arranged above the seat rod clamp can bring a damping effect when the automobile chassis runs after the height of the automobile chassis is adjusted. In addition, this strengthen chassis has still increased the chassis protection shield in the chassis lower part, and the air outlet that is equipped with on the chassis protection shield can carry out fine heat dissipation when using to the car, and this chassis can prevent that the chassis part from being corroded by external silt sewage when satisfying the user to the demand of chassis height, is leaded to the chassis to produce the mar by abominable road conditions and sharp-pointed object.
The chassis collision protection methods have certain defects. The chassis protection device disclosed in patent CN201510024725 is only considered from the perspective of reducing impact of foreign objects on the chassis; the reinforced automobile chassis disclosed in patent CN201810844145 adds a protection plate at the lower part of the chassis while adding a chassis height adjusting device. However, in the actual running process of the vehicle, the collision strength, angle and frequency of the chassis are uncontrollable, and particularly, in the electric vehicle, only passive protection is performed from the angle of enhancing the mechanical strength of the chassis, so that a series of dangerous accidents caused by extrusion of key parts such as a battery box body and the like after the chassis is damaged cannot be avoided.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a collision protection and alarm system for a chassis of an electric vehicle.
In order to achieve the purpose, the invention provides the following scheme:
electric vehicle chassis collision protection and alarm system includes:
the microbend optical fiber sensor is arranged near the chassis and used for sensing chassis deformation and outputting an electric signal;
the microprocessor is connected with the microbend optical fiber sensor and is used for processing the electric signal; the processing comprises amplifying, filtering and denoising;
and the ECU is connected with the microprocessor and used for determining the change rate of the electric signals according to the processed electric signals and determining whether the chassis of the electric vehicle is collided or not according to the change rate, and when the chassis of the electric vehicle is collided, the ECU is also used for generating alarm signals and uploading the alarm signals of different levels corresponding to the collision strength to a national supervision platform of the new energy automobile according to the preset alarm signals of different levels, so that chassis collision monitoring and alarm of corresponding levels are provided according to actual requirements.
Preferably, the microbend fiber sensor includes:
a light source for emitting a light signal;
a multimode optical fiber for transmitting the optical signal;
and the photoelectric converter is connected with the microprocessor and used for receiving the optical signal transmitted by the multimode optical fiber and converting the received optical signal into an electric signal.
Preferably, the microbend optical fiber sensor is a microbend type microbend optical fiber sensor, which further includes:
and the microbend deformer is used for placing the light source, the multimode optical fiber and the photoelectric converter and generating deformation according to external pressure.
Preferably, the microbend deformer is composed of a protective plate and a battery box body of the electric automobile;
the side walls of the protection plate and the battery box body are respectively provided with a sawtooth structure, and the sawtooth structures on the protection plate are relatively matched with the sawtooth structures on the bottom plate or the side plate of the battery box body;
the microbend optical fiber sensor is arranged between the sawtooth structure of the protection plate and the sawtooth structure of the side wall of the battery box body.
Preferably, when the microbend fiber sensor is a sleeve type microbend fiber sensor, wherein a fiber core of the multimode fiber is spirally wound with a polyester fiber, the fiber core is fixed by using a sleeve;
when the sleeve type microbend optical fiber sensor is subjected to external pressure, the sleeve type microbend optical fiber sensor forms periodic deformation.
Preferably, the multimode optical fiber is laid between a protection plate and a battery box body of the electric vehicle.
Preferably, the multimode optical fiber is laid in a U-shaped spiral manner or a concentric circular manner.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the collision protection and alarm system for the chassis of the electric vehicle provided by the invention senses whether the chassis and the battery box body deform or not by adopting the optical signals acquired by the microbend optical fiber sensor. The microprocessor converts the optical signal changes into electrical signal changes and calculates the rate of change of the electrical signals. And the ECU judges the change rate of the electric signal according to a preset threshold value, so that the deformation degree of the chassis and the battery box body is evaluated, and related devices are controlled to process. The system can also provide different alarm levels based on the magnitude of the degree of collision, according to the needs of the actual use scenario.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described 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 without inventive exercise.
FIG. 1 is a signal transmission flow chart of a chassis collision protection and alarm system for an electric vehicle provided by the present invention;
FIG. 2 is a schematic structural diagram of a microbend-type microbend fiber sensor according to the present invention;
FIG. 3 is a schematic structural view of a sleeve-type microbend fiber sensor according to the present invention;
FIG. 4 is a schematic diagram of a positional relationship of a battery case provided by the present invention;
FIG. 5 is a schematic view of a multimode fiber layout method provided by the present invention; wherein, fig. 5 (a) is a schematic diagram of a U-shaped disc-rotating laying mode; FIG. 5 (b) is a schematic view of a concentric circular type of paving.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood 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.
The invention aims to provide a chassis collision protection and alarm system of an electric vehicle, which is used for effectively warning a driver in collision and adopting different coping strategies, can more timely and rapidly evaluate the chassis collision strength aiming at the existing protection strategy of additionally installing a chassis protection structure, reminds the driver to take reasonable coping measures and avoids serious accidents such as vehicle combustion and the like caused by excessive damage of a battery box body.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a collision protection and alarm system for an electric vehicle chassis, which comprises: a microbend fiber sensor, a microprocessor and an ECU (Electronic Control Unit).
The microbend optical fiber sensor is used for acquiring optical signals, is arranged near the chassis and used for sensing optical signal changes caused by chassis deformation and converting the optical signals into electric signals.
The microprocessor is connected with the microbend optical fiber sensor and is used for receiving optical signals transmitted by the multimode optical fiber and processing the optical signals to obtain electric signals. The processing includes amplification, filtering, and denoising.
And the ECU is connected with the microprocessor and used for determining the change rate of the electric signals according to the processed electric signals and determining whether the chassis of the electric vehicle is collided or not according to the change rate, and when the chassis of the electric vehicle is collided, the ECU is also used for generating an alarm signal and selectively uploading vehicle information to a national supervision platform of the new energy automobile in real time according to the collision strength. Specifically, when the selected alarm signal is a second-level alarm signal, the second-level alarm signal is uploaded to the new energy automobile national supervision platform in real time. The alarm signals comprise a primary alarm signal and a secondary alarm signal.
Based on the structure of the collision protection and alarm system for the chassis of the electric vehicle, which is provided by the invention, the specific flow of signal transmission is shown in figure 1, and the microbend optical fiber sensor converts optical signals into electric signals. The microprocessor is connected with the ECU and can process the electric signals and transmit the processed electric signals to the ECU in real time. And the ECU receives the change rate of the electric signals from the microprocessor, controls the vehicle response device according to a response threshold value preset by the system, and takes countermeasures.
Specifically, the microbend optical fiber sensor includes: a light source, a multimode optical fiber, and a photoelectric converter.
Wherein, the light source is used for emitting optical signals. Multimode optical fibers are used to transmit optical signals. The photoelectric converter is connected with the microprocessor and used for converting the detected optical signal into an electric signal. The light source is arranged at the incident end of the multimode optical fiber, and the photoelectric converter is arranged at the emergent end of the multimode optical fiber. The light source and the photoelectric converter can be placed in a gap between the protection plate and the battery box body together, and power is supplied by the battery management system.
The light source is preferably a light emitting diode or a laser light source. The photoelectric converter is matched with the working waveband of the light source.
The microbend optical fiber sensor provided by the invention can be a sleeve type microbend optical fiber sensor, and can also be a microbend type microbend optical fiber sensor, but is not limited thereto, and other battery box collision protection, detection and alarm devices based on the principle of monitoring deformation and pressure by the optical fiber sensor also belong to the range covered by the invention.
The following describes the superior performance of the collision protection and alarm system for the chassis of the electric vehicle, provided by the invention, based on different structural forms of the microbend optical fiber sensor.
Example 1
When microbend optical fiber sensor is microbend type microbend optical fiber sensor, on the basis of the above-mentioned microbend optical fiber sensor mechanism, it still includes: a microbend deformer.
As shown in fig. 2, the microbend deformer is used to place a light source, a multimode optical fiber, and an optical-to-electrical converter, and is used to generate deformation according to an external pressure. In fig. 2, reference numeral 1 denotes a protection plate, reference numeral 2 denotes a multimode optical fiber, and reference numeral 3 denotes a bottom plate or a side plate of the battery case.
The multimode optical fiber is laid between the microbend deformers and passes through the teeth structure, and generates periodic bending under the action of the microbend deformers, thereby causing the change of output light intensity.
Specifically, the optional equidistance sawtooth structure that is provided with of electric automobile guard plate downside constitutes microbend with battery box bottom plate jointly to in order to convert the deformation signal of battery box into the pressure of applying on multimode optic fibre, the optic fibre leaded light rate of deformation consequently produces the change, transmits to photoelectric converter and converts the signal of telecommunication into.
The protection plate is fixed in battery box bottom plate upside, and can bear the weight of the battery module, and its downside optional is equipped with equidistant sawtooth structure (the parameter of specific sawtooth structure is confirmed according to the material that adopts according to the in-service use condition like profile of tooth size, interval etc. for example), has certain clearance with the battery box bottom plate within a definite time. Wherein the relative position of the battery box is shown in fig. 4. The serial number 7 is the bottom of the battery box, the serial number 8 is the side plate of the battery box, and the serial number 9 is the front side plate of the battery box (the front side plate of the battery box is consistent with the advancing direction of the vehicle).
Example 2
When the microbend optical fiber sensor is a sleeve type microbend optical fiber sensor, after the fiber core of the multimode optical fiber is spirally wound with the polyester fiber, the fiber core is fixed and protected by the sleeve, as shown in fig. 3. In this case, no. 4 is a fiber core, no. 5 is a polyester fiber, and No. 6 is a jacket.
The sleeve type microbend optical fiber sensor does not need an additional microbend deformer, and the polyester fiber spiral structure can be regarded as the self-contained deformer. Therefore, the lower side surface of the protection plate can be arranged to be a plane by selecting the sleeve type microbend optical fiber sensor. When the sleeve type microbend optical fiber sensor is subjected to external pressure, the sleeve type microbend optical fiber sensor forms periodic deformation.
In both of the above embodiments 1 and 2, the multimode optical fiber needs to be laid between the fender panel and the battery case of the electric vehicle. In a specific laying process, the multimode optical fiber is laid in a U-shaped spiral manner or in a concentric circle manner, but not limited thereto, wherein two laying manners are shown in fig. 5.
Based on the collision protection and alarm system for the chassis of the electric vehicle provided by the invention, the two-stage collision alarm mechanism related by the invention is as follows:
the micro-bending optical fiber sensor, the microprocessor and the ECU work in real time, the micro-bending deformer converts deformation signals from the chassis and the battery box body into pressure signals, so that the optical fiber light guide rate in the micro-bending optical fiber sensor is changed suddenly, the photoelectric converter converts the change of the optical signals into the change of electric signals and transmits the change of the electric signals to the microprocessor, the microprocessor calculates the change rate of the electric signals, and the ECU judges the change rate of the electric signals according to a preset threshold value, so that the deformation degree of the chassis and the battery box body is evaluated, and related devices are controlled to process the deformation signals.
When the collision strength of the chassis reaches a first-level warning condition, namely the electric signal outburst is greater than or equal to a threshold value delta 1, the deformation of the battery bottom plate is indicated, and a driver is prompted to detect the vehicle chassis as soon as possible in time. When the light intensity transmission process is suddenly interrupted or the electric signal mutation is larger than or equal to the threshold value delta 2, the battery box body bottom plate is obviously damaged, the danger alarm flash lamp is immediately started to warn surrounding vehicles to be far away, a driver is warned to immediately find a safe area to be powered off and stopped and to be far away from the vehicles, and meanwhile, the ECU controls the vehicle communication equipment to perform alarm communication with a related department supervision platform, so that vehicle information is uploaded in real time. Specific values of δ 1 and δ 2 are determined according to the structure, material, and the like of the vehicle chassis and the battery case.
In addition, the electric vehicle chassis collision protection and alarm system provided by the invention can be mounted on the front side plate of the battery box body of the electric vehicle and is used for protection, deformation monitoring and alarm of the battery box body in a forward collision accident. Similarly, the system can be placed on the left side plate and the right side plate of the battery box body and is used for protecting, monitoring deformation and alarming the battery box body in a side collision accident. The composition, placement mode and working principle of the system are the same as those described above.
In conclusion, compared with the prior art, the electric vehicle chassis collision protection and alarm system provided by the invention has the following advantages:
1. the collision protection method can solve the problems that the collision strength cannot be effectively evaluated and alarmed in real time when collision occurs and a driver cannot master the real-time condition of the vehicle chassis in real time in the conventional collision protection measures for the electric vehicle chassis.
2. Aiming at the structural characteristics of the existing electric vehicle, the chassis collision protection and alarm system is constructed by selecting two different microbend optical fiber sensors, and compared with other sensors for pressure and deformation detection in the prior art, the microbend optical fiber sensor adopted by the invention has the advantages of lower cost, stability, reliability and higher accuracy, and can meet the use requirements.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It should be understood that, the sequence numbers of the steps in the embodiment of the present invention do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. Electric vehicle chassis collision protection and alarm system, its characterized in that includes:
the microbend optical fiber sensor is arranged near the chassis and used for sensing chassis deformation and outputting an electric signal;
the microprocessor is connected with the microbend optical fiber sensor and is used for processing the electric signal; the processing comprises amplifying, filtering and denoising;
the ECU is connected with the microprocessor and used for determining the change rate of the electric signals according to the processed electric signals and determining whether the chassis of the electric vehicle is collided or not according to the change rate, and when the chassis of the electric vehicle is collided, the ECU is also used for generating alarm signals and uploading the alarm signals of different levels corresponding to the collision strength to a national supervision platform of the new energy automobile according to the preset alarm signals;
microbend optical fiber sensor is microbend ware formula microbend optical fiber sensor, includes: a light source for emitting a light signal; the multimode optical fiber is paved between a protection plate of the electric vehicle and the battery box body and is used for transmitting the optical signal; the photoelectric converter is connected with the microprocessor and used for receiving the optical signal transmitted by the multimode optical fiber and converting the received optical signal into an electric signal; and a microbend deformer for placing the light source, the multimode optical fiber and the photoelectric converter and for generating deformation according to an external pressure;
the microbend deformer consists of a protection plate of the electric automobile and a battery box body; the side walls of the protection plate and the battery box body are provided with sawtooth structures, and the sawtooth structures on the protection plate are arranged in a manner of being matched with the sawtooth structures on the bottom plate or the side wall of the battery box body; the multimode optical fiber is arranged between the sawtooth structure of the protection plate and the sawtooth structure of the side wall of the battery box body;
the microbend optical fiber sensor is a sleeve type microbend optical fiber sensor, wherein a fiber core of the multimode optical fiber is spirally wound with polyester fiber, and the fiber core is fixed by adopting a sleeve;
when the sleeve type microbend optical fiber sensor is subjected to external pressure, the sleeve type microbend optical fiber sensor forms periodic deformation.
2. The electric vehicle chassis collision protection and alarm system of claim 1, wherein the multimode optical fiber is laid in a U-shaped spiral or concentric circular manner.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110429831.0A CN113060068B (en) | 2021-04-21 | 2021-04-21 | Electric vehicle chassis collision protection and alarm system |
| PCT/CN2021/129502 WO2022222435A1 (en) | 2021-04-21 | 2021-11-09 | Electric vehicle chassis collision protection and alarm system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110429831.0A CN113060068B (en) | 2021-04-21 | 2021-04-21 | Electric vehicle chassis collision protection and alarm system |
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| CN113060068A CN113060068A (en) | 2021-07-02 |
| CN113060068B true CN113060068B (en) | 2022-12-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113060068B (en) * | 2021-04-21 | 2022-12-13 | 北京理工大学 | Electric vehicle chassis collision protection and alarm system |
| CN114074577B (en) * | 2021-09-29 | 2024-01-09 | 岚图汽车科技有限公司 | New energy vehicle battery pack bottom detection method and device |
| CN115402236B (en) * | 2022-09-19 | 2024-05-14 | 阿维塔科技(重庆)有限公司 | Vehicle-mounted sensor position monitoring system and method |
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| CN205220386U (en) * | 2015-11-20 | 2016-05-11 | 石家庄市均益电子有限公司 | Electric automobile collision outage alarm device |
| CN106891829A (en) * | 2015-12-18 | 2017-06-27 | 英业达科技有限公司 | Vehicle crash data monitoring system and its method |
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| CN110758040A (en) * | 2018-07-27 | 2020-02-07 | 西北农林科技大学 | Reinforced automobile chassis |
| CN113060068B (en) * | 2021-04-21 | 2022-12-13 | 北京理工大学 | Electric vehicle chassis collision protection and alarm system |
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- 2021-04-21 CN CN202110429831.0A patent/CN113060068B/en active Active
- 2021-11-09 WO PCT/CN2021/129502 patent/WO2022222435A1/en active Application Filing
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| JP2005241417A (en) * | 2004-02-26 | 2005-09-08 | Hitachi Cable Ltd | Impact detection optical fiber sensor and system using the same |
| CN109895782A (en) * | 2019-04-24 | 2019-06-18 | 泉州师范学院 | Intelligent automobile seat and working method |
| CN211567719U (en) * | 2019-12-25 | 2020-09-25 | 中国第一汽车股份有限公司 | Power battery deformation detection system and vehicle |
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| WO2022222435A1 (en) | 2022-10-27 |
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