CN115402236A - Vehicle-mounted sensor position monitoring system and method - Google Patents
Vehicle-mounted sensor position monitoring system and method Download PDFInfo
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- 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
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Abstract
The embodiment of the invention relates to the technical field of intelligent driving, and discloses a vehicle-mounted sensor position monitoring system and a method, wherein the system comprises the following components: controlling a light source to emit a light signal to an optical fiber sensor in the vehicle-mounted sensor position monitoring system; after receiving optical signals transmitted by the optical fiber sensor at different moments, determining the variation of the position of the optical fiber sensor according to the variation of the optical signals transmitted at different moments; and transmitting the variation of the position of the optical fiber sensor to an alarm in the vehicle-mounted sensor position monitoring system, and triggering the alarm to send out alarm information. By applying the technical scheme of the invention, the position of the vehicle-mounted sensor can be monitored, and the change condition can be quantified; after the vehicle-mounted sensor is displaced, a maintenance worker can be guided to restore the installation position of the vehicle-mounted sensor.
Description
Technical Field
The embodiment of the invention relates to the technical field of intelligent driving, in particular to a system and a method for monitoring the position of a vehicle-mounted sensor.
Background
At present, the utility of the vehicle-mounted sensor (such as laser radar, camera, millimeter wave radar and the like) as a core component of the intelligent vehicle is greatly influenced by the installation position of the vehicle-mounted sensor, and the installation position of the vehicle-mounted sensor not only determines the performance condition of the intelligent vehicle, but also determines the use safety of the intelligent vehicle and influences the service life of an intelligent driving system in the intelligent vehicle. Therefore, before the smart vehicle leaves the factory, various vehicle-mounted sensors are generally installed at reasonable positions of the smart vehicle.
However, in the use process of the smart vehicle, the mounting position of the vehicle-mounted sensor may change due to the influence of collision and other factors, and therefore, a solution capable of monitoring whether the position of the vehicle-mounted sensor changes is needed.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a system and a method for monitoring a position of a vehicle-mounted sensor, which are used to solve the problem that a relative position cannot be guided to be repaired in the prior art.
According to an aspect of an embodiment of the present invention, there is provided an in-vehicle sensor position monitoring system, including: the monitoring host, the optical fiber sensor and the alarm;
the monitoring host is used for controlling the light source to emit light signals to the optical fiber sensor;
the optical fiber sensor is connected with the monitoring host, the relative position of the optical fiber sensor and the vehicle-mounted sensor is fixed, and the optical fiber sensor is used for transmitting corresponding optical signals to the monitoring host after receiving the optical signals;
the monitoring host is further used for determining the variation of the position of the optical fiber sensor according to the variation of the optical signals transmitted at different moments after receiving the optical signals transmitted by the optical fiber sensor at different moments;
the alarm is used for receiving the variable quantity of the position where the optical fiber sensor is transmitted by the monitoring host and sending out alarm information according to the variable quantity.
In an optional manner, the monitoring host is further configured to, when the variation of the optical signal exceeds a first target variation threshold, determine a deformation level corresponding to the variation of the optical signal according to a preset warning rule and the variation of the optical signal, and transmit the deformation level to the warning indicator, where the warning rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different deformation levels;
the warning information sent by the warning device comprises warning information corresponding to the deformation grade.
In an optional manner, the monitoring host is further configured to determine a changed position of the optical fiber sensor according to an initial position of the optical fiber sensor and a change amount of a position where the optical fiber sensor is located.
In an alternative form, the monitoring host includes a detector and a microprocessor;
the detector is used for converting the optical signal transmitted by the optical fiber sensor into an electric signal, processing the electric signal, and sending the processed electric signal to the microprocessor, wherein the processing of the electric signal comprises at least one of amplification processing and filtering processing;
the microprocessor is used for converting the received electric signals into corresponding digital signals, and determining the variation of the position of the optical fiber sensor and the position of the optical fiber sensor after variation by performing signal demodulation calculation on the digital signals.
In an optional manner, the monitoring host is further configured to, before monitoring the position of the vehicle-mounted sensor, control a light source to emit a light signal to the optical fiber sensor, and determine whether the optical fiber sensor can normally transmit the light signal according to whether the light signal transmitted by the optical fiber sensor is received.
In an optional manner, the monitoring host is further configured to, when a variation of the optical signal exceeds a second target variation threshold, determine, according to a preset repair level rule and the variation of the optical signal, a repair level corresponding to the variation, where the repair rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different repair levels;
the alarm is also used for receiving the repair grade transmitted by the monitoring host and sending repair reminding information corresponding to the repair grade.
According to another aspect of the embodiments of the present invention, there is provided a vehicle-mounted sensor position monitoring method, which is applied to a monitoring host in the vehicle-mounted sensor position monitoring system, and the method includes:
controlling a light source to emit a light signal to an optical fiber sensor in the vehicle-mounted sensor position monitoring system;
after receiving optical signals transmitted by the optical fiber sensor at different moments, determining the variation of the position of the optical fiber sensor according to the variation of the optical signals transmitted at different moments;
and transmitting the variation of the position of the optical fiber sensor to an alarm in the vehicle-mounted sensor position monitoring system, and triggering the alarm to send out alarm information.
In an optional manner, the method further comprises:
when the variation of the optical signal exceeds a first target variation threshold, determining a deformation level corresponding to the variation according to a preset warning rule and the variation of the optical signal, wherein the warning rule is used for representing the corresponding relation between a plurality of different variation thresholds and a plurality of different deformation levels;
and transmitting the deformation grade corresponding to the variable quantity to the alarm to trigger the alarm to send out alarm information corresponding to the deformation grade.
In an optional manner, the method further comprises:
and determining the position of the optical fiber sensor after the change according to the initial position of the optical fiber sensor and the change quantity of the position of the optical fiber sensor.
In an optional manner, the method further comprises:
before monitoring the position of the vehicle-mounted sensor, a light source is controlled to emit a light signal to the optical fiber sensor, and whether the optical fiber sensor can normally transmit the light signal is determined according to whether the light signal transmitted by the optical fiber sensor is received.
In an optional manner, the method further comprises:
when the variation of the optical signal exceeds a second target variation threshold, determining a repair grade corresponding to the variation according to a preset repair grade rule and the variation of the optical signal, wherein the repair rule is used for representing the corresponding relation between a plurality of different variation thresholds and a plurality of different repair grades;
and transmitting the repair grade corresponding to the variable quantity to the alarm to trigger the alarm to send repair reminding information corresponding to the repair grade.
In an alternative form, the controlling light source transmits a light signal to a fiber optic sensor in the vehicle-mounted sensor position monitoring system, including:
after a vehicle provided with the vehicle-mounted sensor is started, controlling a light source to emit a light signal to the optical fiber sensor;
or after the vehicle is collided, controlling a light source to emit a light signal to the optical fiber sensor;
alternatively, the light source is controlled to emit a light signal to the optical fiber sensor during the vehicle service.
According to the embodiment of the invention, the monitoring host controls the light source to emit the optical signal to the optical fiber sensor, the optical signal is transmitted by the optical fiber sensor and then received by the monitoring host, the monitoring host determines the variation of the position of the optical fiber sensor according to the variation of the optical signal, the relative position of the optical fiber sensor and the vehicle-mounted sensor is fixed, namely the variation of the position of the optical fiber sensor can reflect the variation of the position of the vehicle-mounted sensor, and the warning device sends out corresponding warning information, so that a vehicle owner can know whether the position of the vehicle-mounted sensor changes at any time, and the vehicle owner can know the state of the intelligent driving system conveniently.
The foregoing description is only an overview of the technical solutions of the embodiments of the present invention, and the embodiments of the present invention can be implemented according to the content of the description in order to make the technical means of the embodiments of the present invention more clearly understood, and the detailed description of the present invention is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present invention more clearly understandable.
Drawings
The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 illustrates a schematic layout of an embodiment of an in-vehicle sensor position monitoring system provided by the present invention;
FIG. 2 illustrates a schematic structural diagram of an embodiment of an in-vehicle sensor position monitoring system provided by the present invention;
FIG. 3 illustrates a signal conversion schematic diagram of an embodiment of an in-vehicle sensor position monitoring system provided by the present invention;
FIG. 4 shows a schematic block diagram of a microprocessor of an embodiment of the in-vehicle sensor position monitoring system provided by the present invention;
FIG. 5 is a schematic flow chart diagram illustrating an embodiment of an in-vehicle sensor position monitoring method provided by the present invention;
FIG. 6 shows a schematic structural diagram of an embodiment of an in-vehicle sensor position monitoring apparatus provided by the present invention;
fig. 7 is a schematic structural diagram of an embodiment of the vehicle-mounted sensor position monitoring device provided by the invention.
Wherein:
11. a monitoring host; 12. an optical fiber sensor;
13-18, an on-board sensor, wherein: 13. the system comprises a short wave camera, a long wave camera, a laser radar, a 16 all-round looking camera, a 17 doubling auxiliary sensor, a 18 millimeter wave radar, a light source and a light source, wherein the short wave camera is 14;
19. an alarm; 21. a laser; 22. a coupler; 23. a first power supply unit; 24. a splitter;
25. a detector, wherein: 31. a photodetector; 32. an integrated circuit;
26. a second power supply unit;
27. a microprocessor, wherein: 41. a main control chip 42, a core computing chip 43, a pulse circuit unit 44 and a data acquisition card;
28. a drive circuit.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
Along with the technological progress, the degree of vehicle intellectualization is higher and higher, and intelligent vehicles are produced at the same time. The intelligent driving system in the intelligent vehicle can acquire corresponding sensor data through the vehicle-mounted sensor, and realize various intelligent functions such as a driving assistance function and the like through processing the sensor data. Thus, the in-vehicle sensor may be considered a core component of the smart vehicle.
In addition, the mounting position of the vehicle-mounted sensor on the smart vehicle may affect the accuracy of the acquired sensor data, and the mounting position of the vehicle-mounted sensor may determine the performance condition of the smart vehicle, determine the safety of the smart vehicle, and even affect the service life of the smart driving system in the smart vehicle. Therefore, before the smart vehicle leaves the factory, it is usually necessary to determine a reasonable position of the vehicle-mounted sensor on the smart vehicle and install the vehicle-mounted sensor at the reasonable position.
However, in the use process of the smart vehicle, the installation position of the vehicle-mounted sensor may change. For example, the position of the vehicle-mounted sensor may be changed when the smart vehicle collides, when the smart vehicle frequently travels on a rough road, or when the smart vehicle receives an external impact.
Therefore, a solution capable of monitoring whether the position of the vehicle-mounted sensor changes is needed so that a user can determine whether the position of the vehicle-mounted sensor changes in time. In order to solve the problem, the application provides a system and a method for monitoring the position of a vehicle-mounted sensor, so as to monitor the position of the vehicle-mounted sensor.
FIG. 1 shows a schematic layout of an embodiment of the in-vehicle sensor position monitoring system of the present invention. In the figure, a monitoring host 11, an optical fiber sensor 12, vehicle-mounted sensors 13-18 and an alarm 19 are included. As shown in fig. 1, the system includes a monitoring host 11, a fiber sensor 12, and an alarm 19.
The monitoring host 11 is used for controlling a light source to emit a light signal to the optical fiber sensor 12.
The optical fiber sensor 12 is connected with the monitoring host 11, the relative position between the optical fiber sensor 12 and the vehicle-mounted sensor is fixed, and the optical fiber sensor 12 is used for transmitting corresponding optical signals to the monitoring host 11 after receiving the optical signals.
In this case, when the position of the optical fiber sensor 12 changes, the position of the in-vehicle sensor also changes accordingly, and the amount of change in the position of the optical fiber sensor 12 is the same as the amount of change in the position of the in-vehicle sensor.
In the application, the relative position fixing of the optical fiber sensor 12 and the vehicle-mounted sensor (13-18) can be realized through the arrangement of the optical fiber sensor 12 and the vehicle-mounted sensor. In one arrangement mode, the optical fiber sensor 12 is provided with a clamping point, such as an anchoring part and the like, near the installation point of each vehicle-mounted sensor (13-18), the clamping point is used for fixing the arrangement of the optical fiber sensor 12 and is rigidly connected with the installation point of each vehicle-mounted sensor (13-18), and the change of the installation position of each vehicle-mounted sensor (13-18) causes the clamping point to shift, so that the deformation of the optical fiber sensor 12 is caused, and the relative position fixing of the optical fiber sensor 12 and the vehicle-mounted sensors is realized.
The optical fiber sensor 12 is an optical communication channel corresponding to the monitoring system and passing through each vehicle-mounted sensor (13-18), the monitoring host 11 emits a light beam through the optical fiber sensor 12, the light beam returns to the monitoring host 11 after passing through the optical communication channel for one circle, and when the positions of the vehicle-mounted sensors (13-18) change, the optical fiber sensors 12 deform correspondingly, and the bending degrees of the deformation are different, so that the reflection spectrums are different. In this case, if the optical fiber sensor 12 changes its position, the optical signals before and after the change are different.
The monitoring host 11 is further configured to, after receiving the optical signals transmitted by the optical fiber sensor 12 at different times, determine a variation of a position where the optical fiber sensor 12 is located according to variations of the optical signals transmitted at the different times.
Since the optical signals transmitted to the monitoring host 11 are different before and after the position of the optical fiber sensor 12 is changed, the monitoring host 11 can determine the variation of the position of the optical fiber sensor 12 according to the variation of the optical signals.
Further, since the relative positions of the optical fiber sensor 12 and the vehicle-mounted sensor are fixed, the variation of the position of the optical fiber sensor 12 can be used as the variation of the position of the vehicle-mounted sensor.
The alarm 19 is configured to receive a variation of the position of the optical fiber sensor 12 transmitted by the monitoring host 11, and send out alarm information according to the variation.
According to the embodiment of the invention, the monitoring host 11 controls the light source to emit the optical signal to the optical fiber sensor 12, the optical signal is transmitted by the optical fiber sensor 12 and then received by the monitoring host 11, the monitoring host determines the variation of the position of the optical fiber sensor 12 according to the variation of the optical signal, and the relative positions of the optical fiber sensor 12 and the vehicle-mounted sensors (13-18) are fixed, so that the variation of the positions of the vehicle-mounted sensors (13-18) can be reflected by the variation of the positions of the optical fiber sensor 12, and corresponding warning information is sent by the warning device 19, so that a vehicle owner can know whether the positions of the vehicle-mounted sensors are changed at any time, and the vehicle owner can know the state of the intelligent driving system conveniently.
The monitoring host 11 is further configured to, when the variation of the optical signal exceeds a first target variation threshold, determine a deformation level corresponding to the variation of the optical signal according to a preset warning rule and the variation of the optical signal, and transmit the deformation level to the warning device 19, where the warning rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different deformation levels;
the warning information sent by the warning device 19 includes warning information corresponding to the deformation level.
In the above embodiment, after receiving the warning information, the user can more intuitively determine the position change condition of the vehicle-mounted sensors (13-18) according to the warning information, and can help the user make a corresponding decision.
If the warning rule is preset to be the corresponding relationship between three different variation thresholds and three different deformation levels, the deformation levels are represented by a first level, a second level and a third level, and when the variation of the optical signal meets the condition that the deformation level is the first level, the warning indicator 19 sends warning information containing first-level deformation; if the alarm 19 sends the warning information in a picture display mode, the picture is displayed in yellow when the deformation level is first, the picture is displayed in blue when the deformation level is second, and the picture is displayed in red when the deformation level is third; in addition, the alarm 19 may be further provided with a speaker, and when the deformation level is three levels, a warning sound is emitted through the speaker while the screen is displayed, so as to indicate to the user that the position of the in-vehicle sensors (13-18) is changed seriously. In this case, based on the warning information, the user can make a corresponding decision to check the vehicle, repair it later or repair it immediately.
The monitoring host 11 is further configured to determine a changed position of the optical fiber sensor 12 according to an initial position of the optical fiber sensor 12 and a change amount of a position where the optical fiber sensor 12 is located.
In this application, the monitoring host 11 may store the initial position of the optical fiber sensor 12 in advance, and in this case, the monitoring host 11 may further determine the changed position of the optical fiber sensor 12 by combining the initial position of the optical fiber sensor 12 and the change amount of the position where the optical fiber sensor 12 is located.
In one possible design of the present application, the monitoring host 11 includes a detector 25 and a microprocessor 27;
the detector 25 is configured to convert the optical signal transmitted by the optical fiber sensor 12 into an electrical signal, process the electrical signal, and send the processed electrical signal to the microprocessor 27, where the processing on the electrical signal includes at least one of amplification processing and filtering processing;
in the above embodiment, by amplifying the electrical signal, it can be avoided that the electrical signal is too weak to be used for determining the variation of the position of the optical fiber sensor 12, or the variation of the position of the optical fiber sensor 12 cannot be accurately determined; by filtering the electrical signals, the disordered electrical signals can be reduced, and when the electrical signals are subsequently processed, the workload of subsequent electrical signal processing can be reduced, and the accuracy of determining the variation of the position of the optical fiber sensor 12 can be improved.
The microprocessor 27 is configured to convert the received electrical signal into a corresponding digital signal, and perform signal demodulation calculation on the digital signal to determine a variation of the position where the optical fiber sensor 12 is located and a position of the optical fiber sensor 12 after the variation.
The light source is a laser 21, and the detector 25 comprises a photodetector and an integrated circuit;
the photodetector is used for converting an optical signal transmitted by the optical fiber sensor 12 into an electrical signal; the integrated circuit is used for processing the electric signal and sending the processed electric signal to the microprocessor 27;
the microprocessor 27 includes: a main control chip 41, a core computing chip 42, a pulse circuit unit 43 and a data acquisition card 44;
the data acquisition card 44 is configured to receive the electrical signal, convert the electrical signal into a digital signal, and send the digital signal to the core computing chip 42;
the core computing chip 42 is configured to receive the digital signal, perform signal demodulation computation, and send a result of the signal demodulation computation to the main control chip 41, and is further configured to send a pulse signal to the pulse circuit unit 43 when the laser 21 is required to transmit an optical signal to the optical fiber sensor 12;
the pulse circuit unit 43 is configured to receive the pulse signal and send a pulse current to the laser 21, so as to trigger the laser 21 to emit an optical signal to the optical fiber sensor 12;
the main control chip 41 is configured to receive the result of the signal demodulation calculation, determine the location of the optical fiber sensor 12 at the different time and the variation of the location according to the result, and send the variation of the location of the optical fiber sensor 12 to the alarm 19.
The monitoring host 11 is further configured to, before monitoring the position of the vehicle-mounted sensor, control a light source to emit a light signal to the optical fiber sensor 12, and determine whether the optical fiber sensor 12 can normally transmit the light signal according to whether the light signal transmitted by the optical fiber sensor 12 is received.
In the above embodiment, the conversion of the optical signal by the photodetector, the processing of the electrical signal by the integrated circuit, the demodulation calculation of the digital signal by the core calculation chip 42, and the determination of the position of the optical fiber sensor 12 and the variation of the position at different times by the main control chip 41 realize the cooperative work of multiple electronic components, and the position of the optical fiber sensor 12 and the variation of the position at different times can be determined quickly and accurately.
The monitoring host 11 is further configured to, when the variation of the optical signal exceeds a second target variation threshold, determine a repair level corresponding to the variation according to a preset repair level rule and the variation of the optical signal, where the repair rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different repair levels;
the alarm 19 is further configured to receive the repair level transmitted by the monitoring host 11, and send repair reminding information corresponding to the repair level.
In the above embodiment, after receiving the repair reminding information, the user can determine whether the installation positions of the vehicle-mounted sensors (13-18) need to be repaired and the emergency degree of repair according to the content of the repair reminding information; in a further embodiment, the repair reminding information with different reminding degrees can be sent out according to different repair grades by referring to the deformation grade.
The alarm 19 comprises a vehicle-mounted host and/or a mobile terminal, and a vehicle owner can check the position change condition of the vehicle-mounted sensor through the vehicle-mounted host and can remotely check the position change information of the vehicle-mounted sensor from the mobile terminal through a vehicle account; when the microprocessor 27 monitors abnormality, under the condition that the vehicle-mounted host computer operates, alarm prompt information is preferably pushed through the vehicle-mounted host computer; and under the condition that the vehicle-mounted host computer is not operated, related information is preferentially and remotely pushed to a vehicle owner through the mobile terminal.
Fig. 2 shows a schematic structural diagram of an embodiment of the vehicle-mounted sensor position monitoring system provided by the invention. As shown in fig. 2, the monitoring host 11 includes a laser 21, a coupler 22, a splitter 24, a detector 25, a power supply unit, a microprocessor 27, and a driving circuit 28.
The driving circuit 28 is used for meeting the on-off requirement of the laser 21.
The power supply unit includes a first power supply unit 23 and a second power supply unit 26; the first power supply unit 23 and the second power supply unit 26 are the main power supply and the auxiliary power supply of this embodiment, and are used for meeting the electric energy required by the operation of the monitoring host 11.
FIG. 3 shows a signal conversion diagram of an embodiment of the in-vehicle sensor position monitoring system provided by the present invention. As shown in fig. 3, the detector 25 includes A Photodetector (APD) 31 and an integrated circuit 32. The optical signal received by the monitoring host 11 is converted into an electrical signal through the photodetector 31, the electrical signal is amplified and filtered by the integrated circuit 32 and then sent to the data acquisition card 44, the data acquisition card 44 converts the electrical signal into a digital signal and sends the digital signal to the microprocessor 27, the microprocessor 27 performs analysis processing to obtain the variation of the position of the optical fiber sensor 12, and the variation is sent to the alarm 19 for the vehicle owner to check.
Fig. 4 is a schematic structural diagram of a microprocessor of an embodiment of the vehicle-mounted sensor position monitoring system provided by the invention. As shown in fig. 4, the microprocessor 27 includes a main control chip 41, a core computing chip 42, a pulse circuit unit 43 and a data acquisition card 44.
The core computing chip 42 demodulates and computes the reflected light wave signal of the digital signal, and outputs the computation result to the main control chip 41. The main control chip 41 may select different systems according to requirements, and an embedded Linux system is selected in this embodiment.
The main control chip 41 evaluates the position change condition of the vehicle-mounted sensor according to the change condition of the optical fiber sensor 12, and compares the calculation result of the reflected light wave signal demodulation calculation with a stored target value to diagnose the variation of the corresponding position, wherein the target value is the initial data of the optical signal reflection collected after the optical fiber sensor 12 is laid. The main control chip 41 diagnoses the position change condition of each vehicle-mounted sensor by comparing and analyzing the variation of the optical signal transmitted by the optical fiber sensor 12 at different times, and when it is diagnosed that the mounting position change condition of a certain vehicle-mounted sensor has a large deviation from the target value, it is determined that the position of the vehicle-mounted sensor is abnormal, and then the warning is given through the warning device 19.
The core computing chip 42 outputs a pulse signal to the laser 21, so that the laser 21 outputs a pulse laser with a specified bandwidth. The specific process is as follows: the core computation chip 42 is programmed to output a predetermined pulse signal, and the pulse signal is input to the pulse circuit unit 43, and the pulse circuit unit 43 generates a predetermined pulse current and inputs the pulse current to the laser 21, and the laser 21 generates a pulse laser having a predetermined bandwidth.
The core computing chip 42 outputs a specified pulse signal to enable the laser 21 to generate a pulse laser with a corresponding pulse width, and the requirement of system measurement change precision is met, wherein the precision can be selected according to actual requirements, and meanwhile, the spatial sampling resolution is met.
The optical fiber sensor 12 is an optical communication channel corresponding to the monitoring system and passing through each vehicle-mounted sensor (13-18), the monitoring host 11 emits a light beam through the optical fiber sensor 12, the light beam returns to the monitoring host 11 after passing through one circle along the optical communication channel, before the position of the vehicle-mounted sensor (13-18) is monitored, the monitoring host 11 analyzes the health condition of the monitoring system according to the condition of an optical signal transmitted by the optical fiber sensor 12, evaluates the working reliability of the monitoring system, and monitors the position change of the vehicle-mounted sensor (13-18) after the working reliability of the monitoring system is determined; when the relative positions of the vehicle-mounted sensors (13-18) change, the light reflection conditions of corresponding points can be influenced, and in the process of monitoring the position change of the vehicle-mounted sensors (13-18), the monitoring host 11 calculates the variation of corresponding positions according to the light reflection change conditions at different moments and then sends the variation to the alarm 19. Meanwhile, the optical fiber sensor 12 is provided with a clamping point, such as an anchoring part, near the mounting point of each vehicle-mounted sensor (13-18), the clamping point is used for fixing the optical fiber sensor 12, the clamping point is displaced due to the change of the mounting position of each vehicle-mounted sensor (13-18), so that the optical fiber sensor 12 is deformed, the deformation bending degrees are different, the reflection spectra are different, the monitoring host 11 analyzes the reflection spectra at different moments, and the change condition is calculated, wherein the reflection spectra are optical signals.
The clamping point fixes the optical fiber sensors, pressure is applied to the optical fiber sensors, so that the refraction and reflection changes are aggravated, the positions of the positions where the refraction and reflection changes are aggravated correspond to the positions of the vehicle-mounted sensors, and the position changes of the vehicle-mounted sensors can be monitored by analyzing the optical signals aggravated by refraction and reflection and positioning the changed positions and variable quantities, so that the optical signal changes caused by the position changes of the vehicle-mounted sensors are eliminated.
It should be noted that during the assembly of the optical fiber sensor 12, bending should be avoided, the working area is a high temperature and high pressure area, and the internal change damage caused by single-point pressing should be avoided during the installation process.
In order to realize the self-monitoring of the system and evaluate the working reliability of the monitoring system, when the monitoring host 11 controls the laser 21 to emit a light signal to the optical fiber sensor 12, whether the optical fiber sensor 12 normally transmits the light signal is determined according to whether the monitoring host 11 receives the light signal transmitted by the optical fiber sensor 12; if the monitoring host 11 can receive the optical signal transmitted by the optical fiber sensor 12, the optical fiber sensor 12 is normal; if the monitoring host 11 does not receive the optical signal transmitted by the optical fiber sensor 12, the optical fiber sensor 12 is abnormal.
When the optical fiber sensor 12 has a breakpoint, the light passing condition is damaged, so that the monitoring host 11 cannot receive the light signal. Therefore, by the scheme, whether the optical fiber sensor 12 can work normally or not can be determined, self-monitoring of the monitoring system can be achieved, and working reliability of the monitoring system is improved.
In order to solve the problem, in the embodiment of the present invention, when a variation of the optical fiber sensor exceeds a second target variation threshold, a repair level corresponding to the variation is determined according to a preset repair level rule and a variation of an optical signal, where the repair rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different repair levels.
The warning device is used for receiving the variation, the changed position, the deformation grade and the repair grade of the position where the optical fiber sensor is located and sending out corresponding warning information.
The vehicle-mounted sensors (13-18) are mainly signal acquisition units forming an intelligent driving system, for example, the sensors involved in the embodiment are as follows: short wave camera 13, long wave camera 14, laser radar 15, look around camera 16, doubling auxiliary sensor 17 and millimeter wave radar 18. The vehicle-mounted sensors (13-18) are not limited to the above sensors, and may be changed according to the actual scheme of the intelligent driving system, and the vehicle-mounted sensors (13-18) may be increased or decreased according to the actual scheme.
Fig. 5 shows a flowchart of an embodiment of the vehicle-mounted sensor position monitoring method of the present invention, which is executed by the monitoring host in the vehicle-mounted sensor position monitoring system in the above-described embodiment of the present application. As shown in fig. 5, the method comprises the steps of:
step 110: and controlling a light source to emit a light signal to an optical fiber sensor in the vehicle-mounted sensor position monitoring system.
Wherein, the light source is controlled to emit the light signal, which comprises the following three conditions:
(case 1) after a vehicle provided with the vehicle-mounted sensor is started, the method is used for realizing position condition check of the vehicle-mounted sensor so as to prevent the position of the vehicle-mounted sensor from changing due to collision after the vehicle is shut down, and therefore the intelligent driving system is prevented from being broken down;
(case 2) determining a state of change in the installation position of the in-vehicle sensor due to the degree of collision after the collision of the vehicle;
(case 3) a guidance for repair restoration during the vehicle repair.
The three conditions can cover most of the situations of monitoring the position change of the vehicle-mounted sensor, for example, after the vehicle runs through a bumpy road section once, the method in the condition 1 can be used for monitoring the position change of the vehicle-mounted sensor, so that the situation that the vehicle-mounted sensor is displaced due to bumping to influence the driving safety again is avoided.
Of course, in other cases, the monitoring host may also control the light source to emit a light signal to the optical fiber sensor in the vehicle-mounted sensor position monitoring system, which is not limited in this application.
Step 120: after receiving the optical signals transmitted by the optical fiber sensor at different times, determining the variation of the position of the optical fiber sensor according to the variation of the optical signals transmitted at different times.
Step 130: and transmitting the variation of the position of the optical fiber sensor to an alarm in the vehicle-mounted sensor position monitoring system to trigger the alarm to send out alarm information.
In the above embodiment, the optical fiber sensors can monitor the position changes of all the vehicle-mounted sensors, and the amount of change of the positions of the optical fiber sensors can be determined by the amount of change of the optical signals, so as to determine the amount of change of the positions of the vehicle-mounted sensors, which is low in implementation cost.
In one possible design of the present application, when the variation of the optical signal exceeds a first target variation threshold, determining a deformation level corresponding to the variation according to a preset warning rule and the variation of the optical signal, where the warning rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different deformation levels;
and transmitting the deformation grade corresponding to the variable quantity to the alarm so as to trigger the alarm to send out the alarm information corresponding to the deformation grade.
In the above embodiment, the warning information corresponding to the deformation level can intuitively convey the offset degree of the vehicle-mounted sensor to the vehicle owner, so that the vehicle owner can judge whether maintenance is needed; if the vehicle is set to be primary deformation, secondary deformation and tertiary deformation, wherein the deformation is 8230, the deformation is 8230and the deformation is n, and the vehicle owner can judge the deformation degree by judging the deformation grade number so as to judge whether maintenance is needed or not and judge the maintenance critical degree and the like.
In one possible design of the present application, when the variation of the optical signal exceeds a second target variation threshold, determining a repair level corresponding to the variation according to a preset repair level rule and the variation of the optical signal, where the repair rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different repair levels;
and transmitting the repair grade corresponding to the variable quantity to the alarm to trigger the alarm to send repair reminding information corresponding to the repair grade.
In the above embodiment, the repair reminding information is used to remind the user to repair the installation position of the vehicle-mounted sensor, and transmit the repair criticality to the user through different repair grades; the repair level may be set with reference to the deformation level.
In a possible design of the present application, after receiving the optical signals transmitted by the optical fiber sensor at different times, the position of the optical fiber sensor after the change is determined according to the initial position of the optical fiber sensor and the variation of the position where the optical fiber sensor is located.
After the changed position of the optical fiber sensor is determined, the changed position information is transmitted to the warning indicator, and the warning indicator sends out corresponding warning information.
In the above embodiment, the initial position of the optical fiber sensor is pre-stored, and the changed position of the optical fiber sensor is obtained through calculation and sent out for the user to know, which is beneficial for the user to know the changed position of the vehicle-mounted sensor, thereby helping the user make decisions such as maintenance.
In one possible design of the present application, before monitoring the position of the vehicle-mounted sensor, the light source is controlled to emit a light signal to the optical fiber sensor, and whether the optical fiber sensor can normally transmit the light signal is determined according to whether the light signal transmitted by the optical fiber sensor is received.
The warning indicator comprises a vehicle-mounted host and/or a mobile terminal.
According to the embodiment of the application, the simulation images of the vehicle and the vehicle-mounted sensor can be generated according to data such as variation and the like in a mode of carrying image simulation software, and are displayed through the vehicle-mounted host and/or the mobile terminal, so that the method is more intuitive and can also provide guidance information for maintenance personnel.
The vehicle-mounted sensor position monitoring method in the embodiment of the invention can monitor the position of the vehicle-mounted sensor at any time, and help a vehicle owner to know whether the position of the vehicle-mounted sensor of the lover vehicle changes at any time, so that the vehicle owner can know the state of an intelligent driving system conveniently; when the local position is abnormal or the abnormal displacement exceeds the target threshold value, the related information is pushed to the vehicle-mounted host and/or the mobile terminal, the vehicle owner is prompted to check or maintain the vehicle, and a maintenance worker can also be guided to restore the mounting position of the vehicle-mounted sensor.
Fig. 6 shows a schematic structural diagram of an embodiment of the vehicle-mounted sensor position monitoring apparatus of the present invention. As shown in fig. 6, the apparatus includes: the device comprises a control module, a determination module and a trigger module;
the control module is used for controlling a light source to emit light signals to an optical fiber sensor in the vehicle-mounted sensor position monitoring system;
the determining module is used for determining the variation of the position of the optical fiber sensor according to the variation of the optical signals transmitted at different moments after receiving the optical signals transmitted by the optical fiber sensor at different moments;
the triggering module is used for triggering the warning indicator to send warning information by transmitting the variation of the position of the optical fiber sensor to the warning indicator in the vehicle-mounted sensor position monitoring system.
The working principle of the vehicle-mounted sensor position monitoring device in the embodiment is as follows: when the optical fiber sensor is installed, a fixed point of the optical fiber sensor is arranged near the installation point of each vehicle-mounted sensor, namely the clamping point, and the relative positions of the installation points of the optical fiber sensor and the clamping point are ensured to be fixed, the tail end of the optical fiber sensor is connected to the controller after sequentially winding around each vehicle-mounted sensor, specifically, a light source emits a light signal and transmits the light signal to the control module through the optical fiber sensor to form a closed loop; then, the determination module is used for detecting optical signals, if the local installation point of the optical fiber sensor is changed due to vehicle collision, the refraction and reflection conditions of the optical signals at the changed position can be changed, the refraction and reflection changes can be aggravated at the fixed point due to the fact that pressure is applied to the optical fiber sensor, the position of the refraction and reflection change aggravated position corresponds to the position of each vehicle-mounted sensor, and the position change and the change quantity can be located through analyzing the aggravated refraction and reflection optical signals, so that the position change of each vehicle-mounted sensor can be monitored; and finally, the corresponding warning information is sent out by the warning device.
The beneficial effect of on-vehicle sensor position monitoring device in this embodiment does: the optical fiber sensors are reasonably arranged to monitor the positions of the vehicle-mounted sensors at any time, so that a vehicle owner can know the position conditions of the positions of the vehicle-mounted sensors of the vehicle at any time; when the local position is abnormal or the abnormal displacement exceeds the first target variation threshold and/or the second target variation threshold, the related information is pushed to the warning indicator, the vehicle owner is prompted to maintain the vehicle, and maintenance personnel can be guided to restore the installation position of the vehicle-mounted sensor.
In the embodiment, the vehicle-mounted sensor position monitoring device can be started according to an actual use environment, and runs after a vehicle is started, so that the position condition of the vehicle-mounted sensor is checked, and the situation that the position of the vehicle-mounted sensor is changed due to collision after the vehicle is shut down, and the intelligent driving system is in failure is avoided; the vehicle-mounted sensor is operated after collision and used for judging the installation position change state of the vehicle-mounted sensor caused by the collision degree; and the device runs in the maintenance process and is used for guiding the maintenance recovery.
Fig. 7 is a schematic structural diagram illustrating an embodiment of the vehicle-mounted sensor position monitoring apparatus according to the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the vehicle-mounted sensor position monitoring apparatus.
As shown in fig. 7, the in-vehicle sensor position monitoring apparatus may include: a processor (processor) 402, a Communications Interface 404, a memory 406, and a Communications bus 408.
Wherein: the processor 402, communication interface 404, and memory 406 communicate with each other via a communication bus 408. A communication interface 404 for communicating with network elements of other devices, such as clients or other servers. The processor 402 is configured to execute the program 410, and may specifically execute relevant steps in the foregoing vehicle-mounted sensor position monitoring method embodiment.
In particular, program 410 may include program code comprising computer-executable instructions.
The processor 402 may be a central processing unit CPU, or an Application Specific Integrated Circuit ASIC (Application Specific Integrated Circuit), or one or more Integrated circuits configured to implement an embodiment of the present invention. The one or more processors included in the monitoring device may be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.
A memory 406 for storing a program 410. Memory 406 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
The program 410 may specifically be invoked by the processor 402 to cause the monitoring device to perform the following operations:
controlling a light source to emit a light signal to an optical fiber sensor in the vehicle-mounted sensor position monitoring system;
after receiving optical signals transmitted by the optical fiber sensor at different moments, determining the variation of the position of the optical fiber sensor according to the variation of the optical signals transmitted at different moments;
and transmitting the variation of the position of the optical fiber sensor to an alarm in the vehicle-mounted sensor position monitoring system to trigger the alarm to send out alarm information.
In an alternative mode, when the control light source transmits a light signal to the optical fiber sensor in the vehicle-mounted sensor position monitoring system, the following three conditions are included:
after a vehicle provided with the vehicle-mounted sensor is started, a light source is controlled to emit a light signal to the optical fiber sensor for checking the position condition of the vehicle-mounted sensor, so that the situation that the position of the vehicle-mounted sensor is changed due to collision after the vehicle is shut down and the intelligent driving system is in failure is avoided;
or after the vehicle collides, controlling a light source to emit a light signal to the optical fiber sensor for judging the mounting position change state of the vehicle-mounted sensor caused by the collision degree;
or, in the vehicle maintenance process, the light source is controlled to transmit a light signal to the optical fiber sensor for guiding maintenance recovery.
In an optional mode, the warning device sends warning information, and the warning information is sent by the vehicle-mounted host and/or the mobile terminal.
Under the condition that the vehicle-mounted host computer runs, warning information is sent out through the vehicle-mounted host computer preferentially;
and under the condition that the vehicle-mounted host computer is not operated, warning information is preferentially sent out through the mobile terminal.
The vehicle-mounted sensor position monitoring equipment in the embodiment of the invention monitors the position of the vehicle-mounted sensor at any time, and helps a vehicle owner to know the change condition of the position of the vehicle-mounted sensor of the vehicle at any time; when the local position is abnormal or the abnormal displacement exceeds the target threshold, the related information is pushed to the vehicle owner, the vehicle owner is prompted to maintain the vehicle, and a maintenance worker can be guided to restore the installation position of the vehicle-mounted sensor.
An embodiment of the present invention provides a computer-readable storage medium, where the storage medium stores at least one executable instruction, and when the executable instruction runs on a vehicle-mounted sensor position monitoring device/apparatus, the monitoring device/apparatus executes the vehicle-mounted sensor position monitoring method in any of the above method embodiments.
The executable instructions may be specifically configured to cause the in-vehicle sensor position monitoring device/apparatus to perform the following:
controlling a light source to emit a light signal to an optical fiber sensor in the vehicle-mounted sensor position monitoring system;
after receiving optical signals transmitted by the optical fiber sensor at different moments, determining the variation of the position of the optical fiber sensor according to the variation of the optical signals transmitted at different moments;
and transmitting the variation of the position of the optical fiber sensor to an alarm in the vehicle-mounted sensor position monitoring system, and triggering the alarm to send out alarm information.
In an optional manner, when the variation of the optical signal exceeds a first target variation threshold, determining a deformation level corresponding to the variation according to a preset warning rule and the variation of the optical signal, where the warning rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different deformation levels;
and transmitting the deformation grade corresponding to the variable quantity to the alarm so as to trigger the alarm to send out the alarm information corresponding to the deformation grade.
In an alternative mode, the position of the optical fiber sensor after the change is determined according to the initial position of the optical fiber sensor and the change amount of the position where the optical fiber sensor is located.
In an alternative mode, before monitoring the position of the vehicle-mounted sensor, the light source is controlled to emit a light signal to the optical fiber sensor, and whether the optical fiber sensor can normally transmit the light signal is determined according to whether the light signal transmitted by the optical fiber sensor is received.
In an optional manner, when the variation of the optical signal exceeds a second target variation threshold, determining a repair level corresponding to the variation according to a preset repair level rule and the variation of the optical signal, where the repair rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different repair levels;
and transmitting the repair grade corresponding to the variable quantity to the alarm to trigger the alarm to send out repair reminding information corresponding to the repair grade.
In an alternative mode, the controlling the light source to emit the optical signal to the optical fiber sensor in the vehicle-mounted sensor position monitoring system includes:
after a vehicle provided with the vehicle-mounted sensor is started, controlling a light source to emit a light signal to the optical fiber sensor;
or, after the vehicle collision, controlling a light source to emit a light signal to the optical fiber sensor;
alternatively, the light source is controlled to emit a light signal to the optical fiber sensor during the vehicle service.
The vehicle-mounted sensor position monitoring equipment in the embodiment of the invention monitors the position of the vehicle-mounted sensor at any time, and helps a vehicle owner to know the change condition of the position of the vehicle-mounted sensor of the lover vehicle at any time; when the local position is abnormal or the abnormal displacement exceeds the target threshold value, the related information is pushed to the vehicle owner, the vehicle owner is prompted to maintain the vehicle, and a maintenance worker can also be guided to restore the installation position of the vehicle-mounted sensor.
The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. In addition, embodiments of the present invention are not directed to any particular programming language.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. Similarly, in the above description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. Where the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore, may be divided into a plurality of sub-modules or sub-units or sub-components. Except that at least some of such features and/or processes or elements are mutually exclusive.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.
Claims (12)
1. An in-vehicle sensor position monitoring system, comprising: the monitoring system comprises a monitoring host (11), an optical fiber sensor (12) and an alarm (19);
the monitoring host (11) is used for controlling a light source to emit a light signal to the optical fiber sensor (12);
the optical fiber sensor (12) is connected with the monitoring host (11), the relative position of the optical fiber sensor (12) and the vehicle-mounted sensor is fixed, and the optical fiber sensor (12) is used for transmitting corresponding optical signals to the monitoring host (11) after receiving the optical signals;
the monitoring host (11) is further configured to determine, after receiving the optical signals transmitted by the optical fiber sensor (12) at different times, a variation of a position where the optical fiber sensor (12) is located according to a variation of the optical signals transmitted at the different times;
the alarm (19) is used for receiving the variation of the position of the optical fiber sensor (12) transmitted by the monitoring host (11) and sending out alarm information according to the variation.
2. The system according to claim 1, wherein the monitoring host (11) is further configured to, when the variation of the optical signal exceeds a first target variation threshold, determine a deformation level corresponding to the variation of the optical signal according to a preset warning rule and the variation of the optical signal, and transmit the deformation level to the warning indicator (19), wherein the warning rule is used for indicating a correspondence relationship between a plurality of different variation thresholds and a plurality of different deformation levels;
the warning information sent by the warning device (19) comprises warning information corresponding to the deformation grade.
3. The system according to claim 1 or 2, wherein the monitoring host (11) is further configured to determine the changed position of the optical fiber sensor (12) according to an initial position of the optical fiber sensor (12) and a change amount of the position of the optical fiber sensor (12).
4. A system according to claim 3, characterized in that said monitoring host (11) comprises a detector (25) and a microprocessor (27);
the detector (25) is used for converting the optical signal transmitted by the optical fiber sensor (12) into an electrical signal, processing the electrical signal, and sending the processed electrical signal to the microprocessor (27), wherein the processing of the electrical signal comprises at least one of amplification processing and filtering processing;
the microprocessor (27) is used for converting the received electric signals into corresponding digital signals, and determining the variation of the position of the optical fiber sensor (12) and the position of the optical fiber sensor (12) after variation by performing signal demodulation calculation on the digital signals.
5. The system according to claim 1, wherein the monitoring host (11) is further configured to control the light source to emit a light signal to the optical fiber sensor (12) before monitoring the position of the vehicle-mounted sensor, and determine whether the optical fiber sensor (12) can normally transmit the light signal according to whether the light signal transmitted by the optical fiber sensor (12) is received.
6. The system according to claim 1, wherein the monitoring host (11) is further configured to, when the variation of the optical signal exceeds a second target variation threshold, determine a repair level corresponding to the variation according to a preset repair level rule and the variation of the optical signal, where the repair rule is used to indicate a correspondence between a plurality of different variation thresholds and a plurality of different repair levels;
the alarm (19) is further configured to receive the repair grade transmitted by the monitoring host (11), and send repair reminding information corresponding to the repair grade.
7. A vehicle-mounted sensor position monitoring method applied to the monitoring host in the vehicle-mounted sensor position monitoring system according to any one of claims 1 to 5, the method comprising:
controlling a light source to emit a light signal to an optical fiber sensor in the vehicle-mounted sensor position monitoring system;
after receiving optical signals transmitted by the optical fiber sensor at different moments, determining the variation of the position of the optical fiber sensor according to the variation of the optical signals transmitted at different moments;
and transmitting the variation of the position of the optical fiber sensor to an alarm in the vehicle-mounted sensor position monitoring system to trigger the alarm to send out alarm information.
8. The method of claim 7, further comprising:
when the variation of the optical fiber sensor exceeds a first target variation threshold, determining a deformation grade corresponding to the variation according to a preset warning rule and the variation of the optical signal, wherein the warning rule is used for representing the corresponding relation between a plurality of different variation thresholds and a plurality of different deformation grades;
and transmitting the deformation grade corresponding to the variable quantity to the alarm to trigger the alarm to send out alarm information corresponding to the deformation grade.
9. The method of claim 7, further comprising:
and determining the position of the optical fiber sensor after the change according to the initial position of the optical fiber sensor and the change quantity of the position of the optical fiber sensor.
10. The method of claim 7, further comprising:
before monitoring the position of the vehicle-mounted sensor, a light source is controlled to emit a light signal to the optical fiber sensor, and whether the optical fiber sensor can normally transmit the light signal is determined according to whether the light signal transmitted by the optical fiber sensor is received.
11. The method of claim 7, further comprising:
when the variation of the optical fiber sensor exceeds a second target variation threshold, determining a repair grade corresponding to the variation according to a preset repair grade rule and the variation of the optical signal, wherein the repair rule is used for representing the corresponding relation between a plurality of different variation thresholds and a plurality of different repair grades;
and transmitting the repair grade corresponding to the variable quantity to the alarm to trigger the alarm to send repair reminding information corresponding to the repair grade.
12. The method of claim 7, the controlling a light source to emit a light signal to a fiber optic sensor in the in-vehicle sensor location monitoring system, comprising:
after a vehicle provided with the vehicle-mounted sensor is started, controlling a light source to emit a light signal to the optical fiber sensor;
or after the vehicle is collided, controlling a light source to emit a light signal to the optical fiber sensor;
alternatively, the light source is controlled to emit a light signal to the optical fiber sensor during the vehicle service.
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