A rainstorm detection system, method and apparatus for road indicator lights

Abstract

The application discloses a rainstorm detection system, method and equipment for a road indicator lamp, comprising a power supply module, a rainstorm detection module and a signal indication module; the rainstorm detection module comprises an audio acquisition unit, a signal processing unit, a data analysis unit and a control unit connected in sequence; the audio acquisition unit acquires a first audio signal in the environment of the road indicator lamp; the signal processing unit filters and processes the first audio signal, and retains a second audio signal related to rainstorm detection; the data analysis unit analyzes the second audio signal, and determines the current rainfall amount; and the control unit is used for sending a strengthening indication instruction to the signal indication module when the current rainfall amount exceeds a preset intensity, and the signal indication module is used for starting a strengthening indication mode. The application performs real-time monitoring on the rainfall condition of the environment where the road indicator lamp is located, and performs strengthening indication through the signal indication module when the rainfall amount exceeds the preset intensity, so that road vehicles are reminded to pay attention to safe driving, and the accident rate is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heavy rain detection, and particularly relates to a heavy rain detection system, method and device for road indicator lights. BACKGROUND

[0002] Highway indicator lights, such as induction lights and intelligent fog lights, are generally installed on highway sections with frequent accidents, such as continuous curves and foggy sections. The induction lights installed on the guardrails on both sides of the road flash synchronously, which enhances the road profile and direction and improves the driver's recognition. When a vehicle drives through the indicator light, the rear indicator light changes to red, forming a red tail tracking band to warn the following vehicles to maintain a safe driving distance.

[0003] The main factor affecting the road profile during highway driving is heavy rain, which has a great impact on the driver's vision. However, heavy rain is often local and sudden, and is not easy to predict and monitor, but it has a greater impact on driving safety. Therefore, how to monitor the heavy rain situation in the road environment has become a technical problem to be solved. SUMMARY

[0004] The purpose of the present application is to provide a heavy rain detection system, method and device for road indicator lights to solve the technical problem that heavy rain is often local and sudden, not easy to predict and monitor, but has a greater impact on driving safety in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The first aspect provides a heavy rain detection system for road indicator lights, comprising a power supply module, a heavy rain detection module and a signal indication module, the power supply module is connected with the heavy rain detection module and the signal indication module respectively, and the heavy rain detection module and the signal indication module are connected.

[0007] The power supply module is used to provide power for the heavy rain detection module and the signal indication module.

[0008] The heavy rain detection module comprises an audio acquisition unit, a signal processing unit, a data analysis unit and a control unit connected in sequence. The audio acquisition unit is used to acquire a first audio signal in the environment around the road indicator light. The signal processing unit is used to filter the first audio signal and only retain a second audio signal related to heavy rain detection. The data analysis unit is used to analyze the second audio signal to determine the current rainfall. The control unit is used to send a strengthening indication instruction to the signal indication module when the current rainfall exceeds a preset intensity.

[0009] The signal indication module is configured to receive a reinforcement indication instruction and start a reinforcement indication mode.

[0010] In a possible design, the audio acquisition unit includes a microphone.

[0011] In a possible design, the first audio signal is a signal of raindrops of heavy rain acting on a shell of the road indication lamp and being transmitted to the microphone in a solid conduction manner.

[0012] In a possible design, the signal processing unit includes a high-pass filter and a threshold comparator connected to the high-pass filter; the high-pass filter is configured to perform low-frequency filtering on the first audio signal to filter out audio signals below a first preset frequency; the threshold comparator is configured to filter out audio signals below a set level, retain only a second audio signal related to heavy rain detection, and amplify and shape the second audio signal into a pulse signal; and the second audio signal has a frequency greater than the first audio signal.

[0013] In a possible design, the data analysis unit includes a counter and a calculation and analysis subunit connected to the counter; the counter is configured to count the pulse signal and send a counting result to the calculation and analysis subunit; and the calculation and analysis subunit is configured to compare the counting result in each time step with a threshold value, and if the counting result in a plurality of continuous time steps exceeds the threshold value, it is determined that a heavy rain signal is detected.

[0014] In a possible design, the control unit includes a microprocessor MCU, and the microprocessor MCU is configured to send a reinforcement indication instruction to the signal indication module when a heavy rain signal is detected, so that the signal indication module receives the reinforcement indication instruction and starts the reinforcement indication mode.

[0015] In a possible design, the road indication lamp includes an induction lamp or a smart fog lamp.

[0016] The second aspect provides a working method of the heavy rain detection system for the road indication lamp according to any possible design in the first aspect, and the working method includes the following steps.

[0017] S1. Acquiring, by an audio acquisition unit, a first audio signal on a shell of a road indication lamp, the first audio signal including N continuous audio signals; and performing filtering processing on the first audio signal by a signal processing unit to retain only a second audio signal related to heavy rain detection.

[0018] Step S2. Determine the current rainfall size by the data analysis unit according to the amplitudes of the N audio signals and the count value of raindrops hitting the indicator light per unit time, and when the current rainfall exceeds the preset intensity and the count value of raindrops hitting the indicator light per unit time is greater than the preset value, send the signal indication module a strengthening indication instruction by the control unit to control the signal indication module to start the strengthening indication mode.

[0019] In a possible design, the data analysis unit determines the current rainfall size according to the amplitudes of the N audio signals and the count value of raindrops hitting the indicator light per unit time, including:

[0020] The data analysis unit acquires a plurality of sampling times T1, T2,..., TN of the first audio signal, and if the time interval value between the continuous M samples in the N sampling times is less than a preset interval value and the sampling amplitudes of the continuous M samples are greater than a preset amplitude value, it is determined that the current rainfall exceeds the preset intensity, and the current rainfall size is determined according to the amplitude of the M sampling times.

[0021] In a third aspect, the present application provides a computer device, comprising a memory, a processor and a transceiver connected in sequence, wherein the memory is used to store a computer program, the transceiver is used to receive and send messages, and the processor is used to read the computer program and execute the working method as described in any one of the possible designs of the second aspect.

[0022] In a fourth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores instructions, and when the instructions run on a computer, the working method as described in any one of the possible designs of the second aspect is executed.

[0023] In a fifth aspect, the present application provides a computer program product comprising instructions, and when the instructions run on a computer, the computer executes the working method as described in any one of the possible designs of the second aspect.

[0024] The beneficial effects of the present application compared with the prior art are:

[0025] The application collects the first audio signal when the road indicator lamp shell is hit by raindrops through the audio acquisition unit, filters the first audio signal through the signal processing unit, only retains the second audio signal related to the heavy rain detection, analyzes the second audio signal through the data analysis unit to determine the current rainfall, and sends the strengthening indication instruction to the signal indication module through the control unit when the current rainfall exceeds the preset intensity, so as to utilize the road indicator lamp system to monitor the rainfall of the environment in real time, and perform the strengthening indication through the signal indication module when the rainfall exceeds the preset intensity, so as to remind the road vehicles to pay attention to safe driving and reduce the accident rate. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structural block diagram of the heavy rain detection system for the road indicator lamp in the embodiment of the application is shown in the figure.

[0027] Figure 2 The circuit principle diagram of the audio signal acquisition in the embodiment of the application is shown in the figure.

[0028] Figure 3 The flow chart of the working method of the heavy rain detection system for the road indicator lamp in the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the application will be briefly introduced with reference to the drawings and the embodiments or the description of the prior art. Obviously, the following description of the drawings structure is only some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor. It should be noted that the description of these embodiment modes is used to help understand the application, but does not constitute a limitation on the application.

[0030] EMBODIMENT

[0031] In order to solve the technical problems that the rainstorm is often local and sudden, is not easy to predict and monitor, but has greater influence on driving safety in the prior art. Embodiments of the present application provide a rainstorm detection system for a road indicator light. The system collects a first audio signal in the environment around the road indicator light through an audio acquisition unit, filters the first audio signal through a signal processing unit, retains only a second audio signal related to rainstorm detection, analyzes the second audio signal through a data analysis unit to determine the current rainfall, and sends a strengthening indication instruction to a signal indication module through a control unit when the current rainfall exceeds a preset intensity, so that the signal indication module receives the strengthening indication instruction and starts a strengthening indication mode, thereby using the road indicator light system itself to monitor the rainfall of the environment in real time, and performing strengthening indication through the signal indication module when the rainfall exceeds the preset intensity to remind road vehicles to pay attention to safe driving and reduce the accident rate.

[0032] The rainstorm detection system for a road indicator light in the present application is described in detail through specific embodiments.

[0033] As shown in Figure 1 and Figure 2 , a rainstorm detection system for a road indicator light is provided in the first aspect, which comprises a power supply module, a rainstorm detection module and a signal indication module. The power supply module is connected with the rainstorm detection module and the signal indication module respectively, and the rainstorm detection module and the signal indication module are connected.

[0034] The power supply module is used to provide power for the rainstorm detection module and the signal indication module. Preferably, the power supply module adopts solar power supply, including a solar panel and a lithium battery pack.

[0035] The rainstorm detection module comprises an audio acquisition unit, a signal processing unit, a data analysis unit and a control unit connected in sequence. The audio acquisition unit is used to collect a first audio signal in the environment around the road indicator light. The signal processing unit is used to filter the first audio signal and retain only a second audio signal related to rainstorm detection. The data analysis unit is used to analyze the second audio signal to determine the current rainfall. The control unit is used to send a strengthening indication instruction to the signal indication module when the current rainfall exceeds a preset intensity.

[0036] The signal indication module is used to receive the strengthening indication instruction and start a strengthening indication mode.

[0037] It should be noted that the road indication lamp in the embodiments of the present application mainly includes an induction lamp or an intelligent fog lamp, and of course, it can be understood that in other application scenarios, the road indication lamp can also be a common street lamp. By installing the heavy rain detection system in the road indication lamp or in the road condition environment where the road indication lamp is located, the local rainfall of the current road section can be accurately detected.

[0038] Based on the above disclosure, the embodiments of the present application collect the first audio signal in the environment around the road indication lamp through the audio acquisition unit, filter the first audio signal through the signal processing unit, retain only the second audio signal related to heavy rain detection, analyze the second audio signal through the data analysis unit to determine the current rainfall, and send a strengthening indication instruction to the signal indication module through the control unit when the current rainfall exceeds the preset intensity. The signal indication module is used to receive the strengthening indication instruction and start the strengthening indication mode, so that the rainfall of the environment where the road indication lamp is located is monitored in real time, and the signal indication module is used for strengthening indication when the rainfall exceeds the preset intensity, so as to remind the road vehicles to pay attention to safe driving and reduce the accident rate.

[0039] In a specific embodiment, the audio acquisition unit includes a pickup, and of course, it can be understood that the audio acquisition unit in the embodiments of the present application can also be any known audio acquisition device, such as a recording device, a microphone, etc., which is not limited here.

[0040] In a specific embodiment, the first audio signal is a signal that is transmitted to the pickup in a solid conduction manner by the heavy raindrops acting on the shell of the road indication lamp. Specifically, the pickup in the embodiments of the present application is arranged on the control circuit board. When the heavy raindrops hit the shell of the road indication lamp, such as the shell of the induction lamp, the sound signal is transmitted to the pickup in a solid conduction manner through the shell and the control circuit board connected with the shell, and then the sound signal of the raindrop is collected.

[0041] Preferably, the pickup in the embodiments of the present application is arranged inside the road indication lamp, which can pick up environmental audio signals, such as vehicle tire noise, engine noise, vehicle wind noise, horn sound or other environmental noise, etc. low frequency signal, and can also pick up the sound signal of the heavy rain or heavy raindrop (usually 3-5mm in diameter) hitting the shell of the road indication lamp (such as the induction lamp). The sound is a high-frequency and high-loudness signal.

[0042] In a specific embodiment, the signal processing unit comprises a high-pass filter and a threshold comparator connected to the high-pass filter; the high-pass filter is used to filter out audio signals below a first preset frequency from the first audio signal; the threshold comparator is used to filter out audio signals below a set level, only keep the second audio signal related to heavy rain detection, and amplify and shape the second audio signal into a pulse signal; wherein the frequency of the second audio signal is greater than that of the first audio signal.

[0043] Specifically, the high-pass filter is used to filter out audio signals below the first preset frequency, so that the amplitudes of low-frequency electrical signals such as vehicle tire noise, horn, vehicle wind noise, and environmental noise are greatly reduced, realizing the first filtering of the audio signal; the comparator circuit inside the threshold comparator filters out audio signals below the set level, so that by filtering out low-frequency and low-amplitude signals, raindrop sounds of a certain size (for example, raindrop sound signals with a diameter less than 3mm) can be filtered out, and then the signal of the heavy raindrops hitting the induction lamp shell and being conducted to the pickup through the chassis and the circuit board connected to the chassis in a solid manner is obtained, and the signal is amplified and shaped into a pulse signal.

[0044] In a specific embodiment, the data analysis unit comprises a counter and a calculation and analysis subunit connected to the counter; the counter is used to count the pulse signals and send the counting result to the calculation and analysis subunit; the calculation and analysis subunit is used to compare the counting result in each time step with a threshold value, and if the counting result in a plurality of consecutive time steps exceeds the threshold value, it is determined that a heavy rain signal is detected.

[0045] Specifically, the counter counts the pulse signals based on a preset time step, wherein the preset time step can be 30s, 1 minute, 5 minutes, 20 minutes, etc., which is not limited here. By obtaining the number of pulse signals in each time step, it is used for subsequent rain size analysis; the calculation and analysis subunit compares the counting result in each time step with a threshold value, for example, compares the counting result of pulse signals in every 5 minutes with a threshold value, and if the number of pulse signals in 3 consecutive 5 minutes exceeds the threshold value, it is considered that a heavy rain signal is detected; wherein the threshold value can be adjusted according to the actual application scenario, which is not limited here.

[0046] In a specific embodiment, the control unit comprises a microprocessor MCU, which is used to send a strengthening indication instruction to the signal indication module when a heavy rain signal is detected, so that the signal indication module receives the strengthening indication instruction and starts the strengthening indication mode.

[0047] It should be noted that the signal indication module in the embodiments of the present application includes but is not limited to a signal indication module composed of a plurality of LED lights, and the intensive indication mode includes but is not limited to a road indication light changing from non-flashing to starting flashing, from slow flashing to fast flashing, from low brightness to high brightness, starting a flowing light mode, uploading heavy rain information to a management center, etc.

[0048] As shown in Figure 2 Fig. 1 shows one of the sound signal collection principle diagrams of the heavy rain detection system for the road indication light in the embodiments of the present application. As shown in the figure, the sound signal is input from Vin, and the audio signal in the range of 50 Hz to 3000 Hz is taken out from Vout through a 2-stage gain 40 db Butterworth band-pass filter. The filtered signal is connected to the ADC of the MCU for sampling analysis, and the MCU judges the rain amount from the data.

[0049] Based on the above disclosure, the embodiments of the present application collect the first audio signal in the environment around the road indication light through the audio acquisition unit, filter the first audio signal through the signal processing unit, retain only the second audio signal related to the heavy rain detection, analyze the second audio signal through the data analysis unit to determine the current rain amount, and send the intensive indication instruction to the signal indication module through the control unit when the current rain amount exceeds the preset intensity, so that the signal indication module receives the intensive indication instruction and starts the intensive indication mode. Thus, the heavy rain detection system for the road indication light can monitor the rainfall in the environment in real time, and perform intensive indication through the signal indication module when the rain amount exceeds the preset intensity, so as to remind the road vehicles to pay attention to safe driving and reduce the accident rate.

[0050] As shown in Figure 3 Fig. 1 shows one of the sound signal collection principle diagrams of the heavy rain detection system for the road indication light in the embodiments of the present application. As shown in the figure, the sound signal is input from Vin, and the audio signal in the range of 50 Hz to 3000 Hz is taken out from Vout through a 2-stage gain 40 db Butterworth band-pass filter. The filtered signal is connected to the ADC of the MCU for sampling analysis, and the MCU judges the rain amount from the data.

[0051] Step S1. Collect the first audio signal on the shell of the road indication light through the audio acquisition unit, wherein the first audio signal includes N continuous audio signals, and filter the first audio signal through the signal processing unit to retain only the second audio signal related to the heavy rain detection;

[0052] Step S2. Determine the current rain amount through the data analysis unit based on the amplitude of the N audio signals and the count value of the raindrops hitting the indication light per unit time. When the current rain amount exceeds the preset intensity and the count value of the raindrops hitting the indication light per unit time is greater than the preset value, send the intensive indication instruction to the signal indication module through the control unit to control the signal indication module to start the intensive indication mode.

[0053] In a possible design, the data analysis unit determines the current rainfall size according to the amplitudes of the N audio signals and the count value of raindrop hitting on the indicator light per unit time, including:

[0054] The data analysis unit acquires a plurality of sampling times T1, T2,..., TN of the first audio signal, and if the time interval value between the continuous M samples in the N sampling times is less than a preset interval value and the sampling amplitudes of the continuous M samples are greater than a preset amplitude value, it is determined that the current rainfall exceeds a preset intensity, and the current rainfall size is determined according to the amplitude of the M sampling times.

[0055] The working process, working details and technical effects of the foregoing method provided by the second aspect of the embodiment can be referred to the system described in the first aspect or any possible design of the first aspect, and will not be repeated here.

[0056] In a third aspect, the present application provides a computer device, including a memory, a processor and a transceiver connected in sequence and in communication, wherein the memory is configured to store a computer program, the transceiver is configured to receive and send messages, and the processor is configured to read the computer program and execute the working method of the second aspect.

[0057] For example, the memory can include, but is not limited to, random access memory (RAM), read-only memory (ROM), flash memory, first-in first-out memory (FIFO) and / or first-in last-out memory (FILO) and the like; the processor can be, but is not limited to, a microprocessor with model STM32F105 series; the transceiver can be, but is not limited to, a WiFi (Wireless Fidelity) wireless transceiver, a Bluetooth wireless transceiver, a GPRS (General Packet Radio Service) wireless transceiver and / or a ZigBee (a low-power local area network protocol based on IEEE 802.15.4 standard) wireless transceiver and the like. In addition, the computer device can further include, but is not limited to, a power module, a display screen and other necessary components.

[0058] The working process, working details and technical effects of the foregoing computer device provided by the third aspect of the embodiment can be referred to the system described in the first aspect or any possible design of the first aspect, and will not be repeated here.

[0059] In a fourth aspect, the present application provides a computer readable storage medium, having stored thereon instructions which, when executed on a computer, perform the working method according to the second aspect.

[0060] The computer readable storage medium refers to a carrier storing data, which can include, but is not limited to, floppy disks, optical disks, hard disks, flash memories, USB flash disks, Memory Sticks, and the like, and the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0061] The working process, working details and technical effects of the aforementioned computer readable storage medium provided by the fourth aspect of the present embodiment can be referred to the system according to the first aspect or any possible design of the first aspect, which will not be repeated here.

[0062] In a fifth aspect, the present application provides a computer program product comprising instructions which, when executed on a computer, cause the computer to perform the working method according to the second aspect.

[0063] The working process, working details and technical effects of the aforementioned computer program product comprising instructions provided by the fifth aspect of the present embodiment can be referred to the system according to the first aspect or any possible design of the first aspect, which will not be repeated here.

[0064] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A rainstorm detection system for a road sign, characterized by, The rainstorm detection module and the signal indication module are connected; The power supply module is used for providing power for the rainstorm detection module and the signal indication module; The rainstorm detection module comprises an audio acquisition unit, a signal processing unit, a data analysis unit and a control unit connected in sequence; the audio acquisition unit is used for acquiring a first audio signal in the environment around the road indication lamp; the signal processing unit is used for filtering the first audio signal and retaining only a second audio signal related to rainstorm detection; the data analysis unit is used for analyzing the second audio signal to determine the current rainfall intensity; and the control unit is used for sending a strengthened indication instruction to the signal indication module when the current rainfall intensity exceeds a preset intensity. The signal indication module is used for receiving the strengthened indication instruction and starting a strengthened indication mode. The signal processing unit comprises a high-pass filter and a threshold comparator connected with the high-pass filter; the high-pass filter is used for low-frequency filtering of the first audio signal to filter out audio signals below a first preset frequency; and the threshold comparator is used for filtering out audio signals below a set level, retaining only the second audio signal related to rainstorm detection, and amplifying and shaping the second audio signal into a pulse signal; wherein the frequency of the second audio signal is greater than that of the first audio signal. The data analysis unit comprises a counter and a calculation and analysis subunit connected with the counter; the counter is used for counting the pulse signal and sending the counting result to the calculation and analysis subunit; and the calculation and analysis subunit is used for comparing the counting result in each time step with a threshold value, and determining that a rainstorm signal is detected if the counting result in a plurality of continuous time steps exceeds the threshold value.

2. The rainstorm detection system for road indicator lights of claim 1, wherein, The audio acquisition unit comprises a sound pickup device.

3. The rainstorm detection system for road indicator lights of claim 2, wherein, The first audio signal is a signal generated by raindrops acting on the shell of the road indication lamp and being transmitted to the sound pickup device in a solid conduction manner.

4. The rainstorm detection system for road indicator lights of claim 1, wherein, The control unit comprises a microprocessor MCU, which is used for sending a strengthened indication instruction to the signal indication module when a rainstorm signal is detected, so that the signal indication module receives the strengthened indication instruction and starts the strengthened indication mode.

5. The rainstorm detection system for road indicator lights of claim 1, wherein, The road indication lamp comprises an induction lamp or a smart fog lamp.

6. A method of operating a storm detection system for a road sign as claimed in any one of claims 1 to 5, characterised in that, The method comprises the following steps: acquiring a first audio signal on the shell of the road indication lamp through an audio acquisition unit, the first audio signal comprising N continuous audio signals; filtering the first audio signal through a signal processing unit and retaining only a second audio signal related to rainstorm detection; determining the current rainfall intensity through a data analysis unit based on the amplitudes of the N audio signals and the counting value of raindrops hitting the indication lamp per unit time; and sending a strengthened indication instruction to the signal indication module through a control unit to control the signal indication module to start a strengthened indication mode when the current rainfall intensity exceeds a preset intensity and the counting value of raindrops hitting the indication lamp per unit time is greater than a preset value.

7. The method of working according to claim 6, characterized in that, The current rainfall size is determined by the data analysis unit according to the amplitudes of the N audio signals and the count value of raindrop hitting on the indicator light per unit time, comprising: The data analysis unit acquires a plurality of sampling times T1, T2,..., TN of the first audio signal, if the time interval value between the continuous M samples in the N sampling times is less than a preset interval value, and the sampling amplitude of the continuous M samples is greater than a preset amplitude value, it is determined that the current rainfall exceeds the preset intensity, and the current rainfall size is determined according to the amplitude of the M sampling times.

8. A computer device, comprising: The device comprises a memory, a processor and a transceiver connected in sequence, wherein the memory is used to store a computer program, the transceiver is used to transceive messages, and the processor is used to read the computer program and execute the working method of claim 6.

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