CN215953471U - Portable detection device of wet and slippery state in road surface - Google Patents
Portable detection device of wet and slippery state in road surface Download PDFInfo
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- CN215953471U CN215953471U CN202120533617.5U CN202120533617U CN215953471U CN 215953471 U CN215953471 U CN 215953471U CN 202120533617 U CN202120533617 U CN 202120533617U CN 215953471 U CN215953471 U CN 215953471U
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Abstract
The utility model relates to the technical field of vehicle operation stability, and discloses a road surface slippery state movable detection device, which comprises: the intelligent car body comprises a plurality of ultrasonic sensors, a plurality of photoelectric sensors, a processor and a wireless communication device, wherein the ultrasonic sensors are arranged on a car body respectively, the photoelectric sensors and the ultrasonic sensors are in one-to-one correspondence, one corresponding photoelectric sensor and one corresponding ultrasonic sensor are arranged at the same position on the car body, the processor is in signal connection with the photoelectric sensors and the ultrasonic sensors respectively and is connected with a power supply, and the wireless communication device is in signal connection with the processor. The utility model provides a mobile detection device for a wet and slippery state of a road surface, which can not only identify the accumulated water or the icing state of the road surface, but also perform optical estimation on the accumulated water or the icing thickness.
Description
Technical Field
The utility model relates to the technical field of vehicle operation stability, in particular to a road surface slippery state movable detection device.
Background
At present, road icing detection methods mainly comprise piezoelectric type, capacitance type, infrared type, optical fiber type and the like, and road ponding detection can be divided into contact type, non-contact type and image type according to different detection methods. The contact detection method mainly comprises a contact water gauge measuring method and a contact sensor measuring method; the non-contact detection method mainly comprises an infrared detection method and an ultrasonic detection method; the image type detection method mainly utilizes image recognition and processing technology to recognize the water accumulation road surface.
In the infrared detection method, the emission light source emits infrared light to the road surface vertically, due to different road surface states, incident light generates a series of optical phenomena such as diffuse reflection, refraction, scattering and absorption on the surface, finally, reflected light intensity detected by the photoelectric detector is different, different road surface states can be qualitatively distinguished and quantitatively detected, and the infrared technology is paid attention to due to the characteristics of good convenience, high accuracy and non-contact.
Ultrasonic waves are mechanical waves with frequencies above 20 khz that propagate in materials at certain speeds and directions and undergo reflection, refraction, and waveform transformation when encountering heterogeneous interfaces with different acoustic impedances. In ultrasonic detection, the material is inspected by using the energy change of the acoustic property difference of the material to the reflection condition and the penetration time of an ultrasonic wave propagation waveform.
In the method for identifying the slippery state of the road, the identification accuracy of the machine vision image identification technology is low, although the training model can achieve a good identification effect, a large amount of data is required to be used as support, high time cost is consumed, meanwhile, a large amount of hardware resources are required to be laid in a contact mode, the cost is high, the identification sites cannot be moved, and the method has great limitation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a mobile detection device for a wet and slippery state of a road surface, which can not only identify the accumulated water or the icing state of the road surface, but also perform optical estimation on the accumulated water or the icing thickness.
The utility model provides a road surface slippery state movable detection device, which comprises:
the ultrasonic sensors are respectively arranged on the vehicle body and used for detecting whether the wet and slippery state of the road surface below the vehicle body is a dry state, a water accumulation state or an icing state;
the photoelectric sensors correspond to the ultrasonic sensors one by one, one corresponding photoelectric sensor and one corresponding ultrasonic sensor are arranged at the same position on the vehicle body, and the photoelectric sensors are used for detecting the thickness of accumulated water or the thickness of ice on the road surface below the vehicle body;
the wireless communication device is used for transmitting the received signals and broadcasting the signals;
the processor is in signal connection with the photoelectric sensor, the ultrasonic sensor and the wireless communication device respectively, is electrically connected with the power supply and is used for receiving accumulated water thickness or icing thickness information transmitted by the ultrasonic sensor and the photoelectric sensor and transmitting the information to the wireless communication device.
Optionally, an amplifier is connected between the photoelectric sensor and the processor, and the amplifier is used for amplifying the signals transmitted to the processor by the photoelectric sensor and the ultrasonic sensor.
Optionally, a low-pass filter is connected between the amplifier and the processor, and is configured to perform noise reduction processing on the signal amplified by the amplifier.
Optionally, the photoelectric sensor and the ultrasonic sensor are respectively mounted at the lower part of a front bumper of the vehicle body and at a side fender of the vehicle body.
Optionally, the processor is an FPGA field programmable gate array.
Optionally, a current-voltage converter is connected between the power supply and the processor, and the current-voltage converter is used for converting the voltage of the power supply to be matched with the rated voltage of the processor.
Compared with the prior art, the utility model has the beneficial effects that: the utility model can utilize the processor to receive photoelectric signals returned by the photoelectric sensor and the ultrasonic sensor in real time, further analyze the thickness of accumulated water or ice on the road surface after judging that the wet and slippery state of the road surface is the accumulated water or ice state, integrate the sensor equipment and the processor to be applied to the mobile vehicle, carry out vehicle-to-vehicle communication in a wireless communication mode, broadcast the detected wet and slippery state information of the road surface to vehicle-mounted units of other vehicles on the road for information sharing.
Drawings
Fig. 1 is a schematic structural diagram of a mobile road surface slippery state detection device according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the structure at A in FIG. 1;
FIG. 3 is a circuit diagram of an electronic control unit of the processor according to an embodiment of the present invention;
fig. 4 is a hardware architecture diagram of a wireless communication device according to an embodiment of the present invention.
Description of reference numerals:
the system comprises a 1-photoelectric sensor, a 2-ultrasonic sensor, a 3-wireless communication device, a 4-low-pass filter, a 5-processor, a 6-amplifier and a 7-current-voltage converter.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-2, a mobile road surface slippery state detection device provided in an embodiment of the present invention includes: a photoelectric sensor 1, an ultrasonic sensor 2, a processor 5 and a wireless communication device 3, wherein a plurality of ultrasonic sensors 2 are respectively arranged on a vehicle body, the device is used for detecting whether the wet and slippery state of the road surface below the vehicle body is a dry state, a ponding state or an icing state, a plurality of photoelectric sensors 1 correspond to ultrasonic sensors 2 one by one, one corresponding photoelectric sensor 1 and one corresponding ultrasonic sensor 2 are arranged at the same position on the vehicle body, the photoelectric sensor 1 is used for detecting the ponding thickness or the icing thickness of the road surface below the vehicle body, a wireless communication device 3 is used for transmitting received signals and broadcasting the signals, a processor 5 is respectively in signal connection with the photoelectric sensors 1, the ultrasonic sensors 2 and the wireless communication device 3, the processor 5 is electrically connected with a power supply, the wireless communication device is used for receiving the ponding thickness or icing thickness information transmitted by the ultrasonic sensor 2 and the photoelectric sensor 1 and transmitting the information to the wireless communication device 3.
In this embodiment, the power supply is a vehicle-mounted storage battery, as shown in fig. 4, the wireless communication device 3 in this embodiment is powered by a direct current l2V, which provides rich hardware interface resources, and has a network interface, an SD card interface, a USB interface, a CAN bus interface, a GNSS interface, an audio interface, an indicator light and a key, wherein the GPS interface provides 4.7V and 50mA output, the CAN bus interface supports two rates of data, one is l mbit/sec, one is 125kbit/sec, and includes two antennas, which support broadcasting of a single antenna, and two antennas broadcast simultaneously or switching of one channel antenna, and these hardware interfaces mainly provide good support for data acquisition of a vehicle and data communication between vehicle-mounted terminals. Through the wireless communication device 3, the road surface slippery state information and the own vehicle GPS information collected by the mobile vehicle can be shared with other vehicles around, and the wireless communication device is an important ring in the information interaction of the vehicle networking.
The utility model can utilize the processor to receive photoelectric signals returned by the photoelectric sensor and the ultrasonic sensor in real time, further analyze the thickness of accumulated water or ice on the road surface after judging that the wet and slippery state of the road surface is the accumulated water or ice state, integrate the sensor equipment and the processor to be applied to the mobile vehicle, carry out vehicle-to-vehicle communication in a wireless communication mode, broadcast the detected wet and slippery state information of the road surface to vehicle-mounted units of other vehicles on the road for information sharing.
Specifically, the amplifier 6 is connected between the photoelectric sensor 1 and the processor 5, the amplifier 6 is used for amplifying the signals transmitted from the photoelectric sensor 1 and the ultrasonic sensor 2 to the processor 5, the amplifier 6 mainly amplifies weak electric signals, which not only can improve the signal-to-noise ratio of the system, but also can reduce the relative influence of external interference, and meanwhile, the gain is high, the input impedance is high, the output impedance is low, impedance conversion and matching can be realized, and partial input noise is suppressed, i.e., the output quality of the signal to be detected is ensured as much as possible while the amplitude amplification of the signal to be detected is ensured, so that the signals transmitted from the photoelectric sensor 1 and the ultrasonic sensor 2 to the processor 5 are stronger.
In particular, a low-pass filter 4 is connected between the amplifier 6 and the processor 5 for noise-reducing the signal amplified by the amplifier 6, the low-pass filter 4 allowing a direct current to a certain cut-off frequency(fCUTOFF)The noise is minimized to eliminate the influence of the spurious signals in the signal transmission process on the result.
Optionally, the photoelectric sensor 1 and the ultrasonic sensor 2 are respectively mounted at the lower part of a front bumper of a vehicle body and at a fender at the side of the vehicle body, six pairs of the photoelectric sensor 1 and the ultrasonic sensor 2 in the embodiment are formed in a pair mode and are uniformly distributed at the lower part of the front bumper of the vehicle and two sides of the front part of the vehicle body, as shown in fig. 1, light signals and ultrasonic signals can be emitted to the front and two sides of a driving road of the vehicle in a large visual range and a large range, and then the maximum road surface wet and slippery state monitoring is completed.
Optionally, the processor 5 is an FPGA field programmable gate array, the model of the FPGA field programmable gate array is IDS2-70 in this embodiment, the FPGA field programmable gate array is used for performing analysis processing such as registering and sampling on input signals of various sensors according to a logic gate circuit, obtaining a wet and slippery road surface state, predicting accumulated water or icing thickness in the state, outputting a certain signal instruction, and broadcasting the signal instruction to other vehicles through a wireless communication device, a circuit diagram of an electric control unit of the FPGA field programmable gate array is shown in fig. 3, the FPGA field programmable gate array mainly comprises an input signal conditioning circuit, an output signal processing circuit, a power supply circuit and the like, and in order to ensure that a control system works reliably, the electric control unit must also adopt effective anti-interference measures and fault self-diagnosis measures.
Optionally, a current-voltage converter 7 is connected between the power supply and the processor 5, the current-voltage converter 7 is configured to convert a voltage of the power supply to adapt to a rated voltage of the processor 5, the current-voltage converter 7 is configured to convert an input voltage signal into a current signal satisfying a certain relationship, the converted current is equivalent to an output-adjustable constant current source, an output current of the output-adjustable constant current source should be stable and not change with a change of a load, the current-voltage converter 7 is connected between the vehicle-mounted storage battery and the power supply of the FPGA, and occurrence of interference of a weak voltage signal due to various external factors during transmission of a transmission line is avoided.
The photoelectric sensor 1 is a sensor using a photoelectric element as a detection element, and generally comprises a light source, an optical path and a photoelectric element, in this embodiment, an L12170 infrared LED manufactured by hamamatsu corporation is used as a light source, a PT5I850AC phototriode manufactured by xingyochi optical technology is used as a detector, and finally, the two are packaged together to form the photoelectric sensor 1 of the system, which firstly measures the measured change, that is, the change of the accumulated water and the frozen medium and the change of the thickness are converted into the change of the optical signal, then the optical signal is further converted into the electrical signal by the photoelectric element, the photoelectric sensor 1 reflects or blocks the modulated optical signal emitted by the light emitting diode through an object, so that the photoelectric detector 1 receives or does not receive the optical signal to control the internal circuit of the photoelectric sensor 1, and further the acquisition and the output of the analog quantity information are realized. When the sensor is connected with an external power supply, the pulse generator can control the light emitter to emit infrared light, incident light is subjected to diffuse emission after encountering a barrier object, and the diffusely reflected light finally reaches the receiver, namely, the diffusely reflected light is captured by the phototriode and then can convert an optical signal into an electric signal and finally is transmitted to the FPGA in the form of current and voltage.
The ultrasonic sensor 2 is a sensor for converting an ultrasonic signal into another energy signal (usually an electric signal), is composed of a piezoelectric wafer, and can transmit and receive ultrasonic waves, and in the present embodiment, a stand-alone T/R40-16 type ultrasonic sensor (manufactured by hitachi ceramics co., ltd., japan) having a center frequency of 40kHz (wavelength 8.5mm) and a directivity of 50deg of-6 dB is used as a transmitting and receiving unit for detecting the reflection intensity. The penetration of ultrasonic waves to liquid and solid is large, particularly in the opaque solid with sunlight, when the opaque solid with sunlight touches impurities or an interface, obvious reflection is generated to form reflection echoes, the wet and slippery state of a corresponding road surface is judged to be in a dry, water accumulation or icing state by analyzing different reflection echo frequencies, and finally the reflection echoes are transmitted to an FPGA (field programmable gate array) in an electric signal mode.
The working principle is as follows: when a vehicle runs on the road surface, when the ultrasonic sensor 2 detects that water is accumulated or ice is formed on the road surface, the information is transmitted to the FPGA in real time, meanwhile, the photoelectric sensor 1 detects the thickness of the water accumulation or ice and transmits the information to the FPGA in real time, the two signals are amplified by the amplifier 6 before being transmitted to the FPGA, then the noise is reduced as much as possible by the low-pass filter 4 to eliminate the influence of stray signals in the signal transmission process on the signals transmitted to the FPGA, the FPGA transmits the received water accumulation or ice thickness information to the wireless communication device 3, and the wireless communication device 3 can broadcast the received information to other vehicles and the vehicle in the current road section in real time.
In conclusion, the photoelectric signals returned by the photoelectric sensor and the ultrasonic sensor in real time can be received by the processor, the thickness of accumulated water or ice on the road surface is further analyzed after the wet and slippery state of the road surface is judged to be the accumulated water or ice state, the sensor device and the processor are integrally applied to the mobile vehicle, the vehicle-to-vehicle communication is carried out in a wireless communication mode, the detected wet and slippery state information of the road surface is broadcasted to vehicle-mounted units of other vehicles on the road for information sharing.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (6)
1. The utility model provides a portable detection device of wet and slippery state in road surface which characterized in that includes:
the ultrasonic sensors (2) are respectively arranged on the vehicle body and are used for detecting whether the wet and slippery state of the road surface below the vehicle body is a dry state, a water accumulation state or an icing state;
the photoelectric sensors (1) correspond to the ultrasonic sensors (2) one by one, one corresponding photoelectric sensor (1) and one corresponding ultrasonic sensor (2) are arranged at the same position on the vehicle body, and the photoelectric sensors (1) are used for detecting the accumulated water thickness or the icing thickness of the road surface below the vehicle body;
the wireless communication device (3) is used for transmitting the received signals and broadcasting the signals;
processor (5), respectively with photoelectric sensor (1), ultrasonic sensor (2) and wireless communication device (3) signal connection, processor (5) are connected with the power electricity for receive the ponding thickness of ultrasonic sensor (2) and photoelectric sensor (1) transmission or freeze thickness information and with this information transmission for wireless communication device (3).
2. The mobile detection device for the wet and slippery road surface state according to claim 1, characterized in that an amplifier (6) is connected between the photoelectric sensor (1) and the ultrasonic sensor (2) and the processor (5), respectively, and the amplifier (6) is used for amplifying the signals transmitted to the processor (5) by the photoelectric sensor (1) and the ultrasonic sensor (2).
3. The mobile device for detecting the wet and slippery condition of a road surface according to claim 2, characterized in that a low-pass filter (4) is connected between the amplifier (6) and the processor (5) for noise reduction of the signal amplified by the amplifier (6).
4. The mobile pavement slippery condition detection apparatus according to claim 1, wherein the photoelectric sensor (1) and the ultrasonic sensor (2) are mounted at a lower portion of a front bumper of the vehicle body and at a side fender of the vehicle body, respectively.
5. The mobile pavement slippery condition detection device according to claim 1, wherein the processor (5) is an FPGA field programmable gate array.
6. The mobile device for detecting the slippery conditions of road surfaces according to claim 1, characterized in that a current-voltage converter (7) is connected between the power supply and the processor (5), wherein the current-voltage converter (7) is used for converting the voltage of the power supply to be matched with the rated voltage of the processor (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120533617.5U CN215953471U (en) | 2021-03-15 | 2021-03-15 | Portable detection device of wet and slippery state in road surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120533617.5U CN215953471U (en) | 2021-03-15 | 2021-03-15 | Portable detection device of wet and slippery state in road surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215953471U true CN215953471U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120533617.5U Expired - Fee Related CN215953471U (en) | 2021-03-15 | 2021-03-15 | Portable detection device of wet and slippery state in road surface |
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| Country | Link |
|---|---|
| CN (1) | CN215953471U (en) |
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2021
- 2021-03-15 CN CN202120533617.5U patent/CN215953471U/en not_active Expired - Fee Related
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Granted publication date: 20220304 |