CN109738517B - Light power-saving scanning type sound wave detector and detection method thereof - Google Patents
Light power-saving scanning type sound wave detector and detection method thereof Download PDFInfo
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- CN109738517B CN109738517B CN201811570323.9A CN201811570323A CN109738517B CN 109738517 B CN109738517 B CN 109738517B CN 201811570323 A CN201811570323 A CN 201811570323A CN 109738517 B CN109738517 B CN 109738517B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention provides a light-weight power-saving scanning type sound wave detector and a detection method thereof, wherein the detector comprises a central control system, a power supply, a sending sensor, a receiving sensor, a GPS system, a time system, a memory, low-energy-consumption Bluetooth, a measuring wheel, equipment of a field inspector, an amplifier and an indicator light; wherein, the power supply, the sending sensor, the receiving sensor, the GPS system, the time system, the memory, the measuring wheel and the indicator light are all connected with the central control system; the memory is connected to the inspector's equipment using low energy bluetooth. The detector provided by the invention can adopt measures of increasing the density of the measuring points aiming at the road surface with a damage condition according to the real-time waveform data information, thereby improving the detection quality and efficiency and greatly reducing the energy consumption.
Description
Technical Field
The invention belongs to the field of pavement detection, and particularly relates to a light power-saving scanning type acoustic wave detector and a detection method thereof.
Background
The ultrasonic detector is a novel detector developed by utilizing the characteristics of ultrasonic waves. The traditional ultrasonic detector device only executes a preset mode inside in a single way, and the same measuring point density is adopted for both a sound road surface and a damaged road surface. The damaged road surface needs to improve the density of the measuring points, and the damage condition of the road surface is displayed more comprehensively and finely; on the contrary, a good road surface can adopt a common detection mode, namely, a common measuring point density is used. The existing ultrasonic detector equipment cannot meet the requirements, the damaged pavement detection effect is poor, the energy waste is caused, and the detection efficiency is reduced.
The data information transmission of traditional ultrasonic detector equipment adopts the mobile signal data transmission mode, directly with data transmission to display terminal, and the real-time behavior of detector can't be known to the field work personnel according to waveform data information. If the detector fails halfway, the subsequent result can be distorted.
The traditional ultrasonic detector equipment does not process the acquired waveform data information at all, and directly sends the original waveform data information to a display terminal, so that the waveform data information of a lot of environmental interference is directly displayed in a result, and interference is generated in judgment of a conclusion. In addition, the field detection generally lasts for a long time, the obtained data information has large capacity, and the transmission is difficult.
The traditional ultrasonic detector equipment is large in battery, and the whole equipment is large in size and heavy. And because the energy consumption is high, frequent charging is needed, so that the detection process is more complicated.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems that the traditional ultrasonic detector is single in detection mode, large in equipment size and causes interference of environmental factors on judgment due to the fact that original data are not processed at all, the invention provides a light power-saving scanning type acoustic wave detector and a detection method thereof.
The technical scheme is as follows: the invention provides a light-weight power-saving scanning type sound wave detector which comprises a central control system, a power supply, a sending sensor, a receiving sensor, a GPS (global positioning system), a time system, a memory, low-energy-consumption Bluetooth, a measuring wheel, equipment of a field inspector and an amplifier, wherein the power supply is connected with the central control system;
the GPS system and the time system are respectively used for generating coordinate information and time information and sending the coordinate information and the time information to the central control system; the power supply generates voltage under the control of the central control system, and the sending sensor converts an electric signal of the voltage generated by the power supply into ultrasonic waves; the ultrasonic waves are reflected by the ground and then received by a receiving sensor; the receiving sensor converts the ultrasonic waves into alternating charges, and the alternating charges are converted into voltage signal waveform data through the amplifier and transmitted to the central control system; the central control system compares the received voltage signal waveform data with the voltage signal waveform parameters of a normal road surface stored in the central control system to judge whether the road surface is normal, and if the road surface is normal, the central control system controls the measuring wheel to continue to detect forwards; if the road surface is abnormal, the central control system controls the measuring wheel to repeatedly detect the road surface section which is determined to be abnormal, and the voltage signal waveform data obtained by repeated detection is used for judging whether the reason causing the abnormality of the road surface section is road surface damage or environmental interference; if the interference is environmental interference, the central control system controls the measuring wheel to continuously detect the road surface forwards after deleting the waveform data which are repeatedly measured; if the road surface is damaged, the central control system reduces the speed of the measuring wheel and collects the voltage signal waveform data of the road surface judged to be damaged again; after the whole pavement detection is finished, the central control system compresses the acquired voltage signal waveform data and the coordinate information and time information corresponding to the waveform data to obtain compressed data; transmitting the compressed data to a memory; the memory uses bluetooth low energy to transmit the received compressed data to the device of the on-site inspector.
Furthermore, the GPS system adopts a SiRFstar III chip, the time system adopts a CMOS chip, the memory adopts an Intel-2716 chip, the low-energy-consumption Bluetooth adopts a WH-BT200 chip, and the central control system adopts a SandForce SF-2281 chip.
Further, the detector also comprises an indicator light connected with the central control system and used for displaying different colors under the conditions of normal road surface, environmental interference and road surface damage.
Furthermore, the transmitting sensor and the receiving sensor have the same structure and respectively comprise a force transmission upper cover, a piezoelectric sheet, an electrode leading-out plug, an insulating material and a base; the force transmission upper cover is buckled with the base, a containing cavity is formed between the force transmission upper cover and the base, electrodes are placed in the containing cavity, piezoelectric patches are respectively placed on the upper portion and the lower portion of each electrode, the electrodes are connected with an electrode leading-out plug in a leading-out mode through the side face of the base, and the electrodes are separated from the base through insulating materials.
Furthermore, the detector also comprises a display screen connected with the central control system and used for displaying coordinate information, time information and voltage signal waveform data.
A detection method of a light power-saving scanning type sound wave detector specifically comprises the following steps:
step 2, the central control system compares the road surface voltage signal waveform data acquired by the detector with preset parameters to judge whether the road surface is normal or not, if the voltage signal waveform data is within the range of the preset parameters, the road surface is judged to be normal, the central control system controls the measuring wheel to continue to detect forwards and controls the indicator lamp to display green, otherwise, the road surface is judged to be abnormal, and the step 3 is carried out;
step 3, the central control system controls the measuring wheel to stop moving forwards and controls the measuring wheel to repeatedly detect the road surface which is judged to be abnormal at the speed consistent with that in the step 2; the central control system judges whether the reason causing the abnormal road surface section is road surface damage or environmental interference by using voltage signal waveform data obtained by repeated detection; if the interference is environmental interference, the central control system controls the indicator lamp to display yellow and controls the measuring wheel to continue to detect forwards; if the road surface is damaged, the central control system collects the voltage signal waveform data of the road surface judged to be damaged again after reducing the rotating speed of the measuring wheel, and controls the indicator lamp to display red;
and 4, after the whole road surface detection is finished, compressing the acquired road surface voltage data waveform and the coordinate information and time information corresponding to the waveform by the central control system, and transmitting the compressed data to the memory.
Further, the specific steps of distinguishing the environmental interference and the road surface damage in the step 3 are as follows:
step 3.1: the central control system controls the measuring wheel to repeatedly detect the road surface which is judged to be abnormal within the time t, and n sections of voltage signal waveform data are obtained;
wherein n is the number of repeated detections, and f is the ultrasonic emission frequency;
step 2.2, observing the amplitude in the n sections of waveform data, if the amplitude meets the formula 1, judging that the road surface is abnormal due to road surface damage, otherwise, judging that the road surface is abnormal due to environmental interference, displaying yellow by an indicator light, and deleting the n sections of waveforms;
in the above formula, AiFor the amplitude in the ith waveform data under test, i is 1, 2, …, n.
Has the advantages that: the detector provided by the invention can adopt measures of increasing the density of the measuring points aiming at the road surface with a damage condition according to the real-time waveform data information, thereby improving the detection quality and efficiency and greatly reducing the energy consumption. Meanwhile, real-time data waveforms are compressed, so that transmission is easier. In addition, the low-energy-consumption Bluetooth is assembled in the detector, and the Bluetooth data transmission is used for replacing mobile data transmission, so that data are firstly displayed on equipment of a field inspector of a field worker and then transmitted to the terminal by the equipment. Therefore, field workers can monitor the working condition of the detector in real time, and the whole detection process is ensured to be correct. Because of the low energy consumption, the battery steps assembled in the equipment are small, light and portable. The charging is not required to be frequently carried out, and the work can be continued for a whole day.
Drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
FIG. 2 is a schematic diagram of a transmit/receive sensor of the present invention;
FIG. 3 is a flow chart of the operation of the present invention;
FIG. 4 is a front view of the present invention;
fig. 5 is a top view of the present invention.
Description of the figures 1, force-transmitting cover; 2. a piezoelectric sheet; 3. an electrode; 4. an electrode lead-out plug; 5. an insulating material; 6. a base; 7. adjusting a knob; 8. a measuring wheel; 9. a display screen.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
As shown in figure 1, the invention provides a light-weight power-saving scanning type acoustic wave detector which comprises a central control system, a power supply, a sending sensor, a receiving sensor, a GPS system, a time system, a memory, low-energy Bluetooth, a measuring wheel, an indicator light and equipment of a field inspector.
The GPS system and the time system are respectively used for generating coordinate information and time information and sending the coordinate information and the time information to the central control system; the central control system controls the power supply to generate voltage with resonant frequency, and the power supply voltage parameter in the embodiment is selected to be DC12V +/-10% or DC24V +/-10%; the transmitting sensor converts an electric signal of voltage generated by the power supply into ultrasonic waves; the ultrasonic waves are reflected by the ground and then received by a receiving sensor; the receiving sensor converts the ultrasonic waves into alternating charges, and the alternating charges are converted into voltage signal waveform data through the amplifier and transmitted to the central control system; the central control system compresses the acquired voltage signal waveform data and coordinate information and time information corresponding to the waveform data to obtain compressed data; transmitting the compressed data to a memory; the memory uses bluetooth low energy to transmit the received compressed data to the device of the on-site inspector.
The GPS system adopts a SiRFstar III chip, the time system adopts a CMOS chip, the memory adopts an Intel-2716 chip, the low-energy-consumption Bluetooth adopts a WH-BT200 mode which can operate in a single-selection double mode and is compatible with a BLE/EDR mode, and the central control system adopts a SandForce SF-2281 chip.
As shown in fig. 2, the transmitting sensor and the receiving sensor have the same structure, and each of the transmitting sensor and the receiving sensor includes a force transmission upper cover 1, a piezoelectric sheet 2, an electrode 3, an electrode lead-out plug 4, an insulating material 5, and a base 6. Wherein, the piezoelectric sheet 2 is generally selected from natural quartz crystal or artificial piezoelectric ceramics. The force transmission upper cover 1 is buckled with the base 6, an accommodating cavity is formed between the force transmission upper cover and the base 6, the electrode 3 is placed in the accommodating cavity, the piezoelectric sheets 2 are respectively placed on the upper portion and the lower portion of the electrode 3, the electrode 3 is connected with an electrode leading-out plug 4 in a leading-out mode through the side face of the base 6, and the electrode 3 is separated from the base 6 through the insulating material 5.
After the central control system controls the power supply to generate a voltage with a resonance frequency in the transmitting sensor, the piezoelectric sheet 2 generates mechanical vibration with a corresponding frequency through an inverse piezoelectric effect, and an electric signal is converted into ultrasonic waves. At this time, the force transmission upper cover 1 is responsible for strengthening ultrasonic waves.
In the receiving sensor, ultrasonic waves reflected by the road surface act on the piezoelectric sheet 2 through the force transmission upper cover 1, namely acting force is exerted on the piezoelectric sheet 2, alternating charges are generated on the surface of the piezoelectric sheet according to the piezoelectric effect, and the charges are converted into voltage signals through an amplifier (voltage or charge amplifier) to be displayed.
In this embodiment, the detector further includes a display screen connected to the central control system for displaying the coordinate information, the time information and the voltage signal.
As shown in fig. 3, a detection method based on a light power-saving scanning acoustic detector specifically includes the following steps:
Step 2, the central control system controls the measuring wheel to detect at a speed of 3cm/s in the embodiment; and the central control system compares the voltage signal waveform data of the road surface acquired by the detector with preset parameters, if the voltage signal waveform data of the section is within the range of the preset parameters, the section of the road surface is judged to be normal, the central control system controls the measuring wheel to continue to detect forwards and controls the indicator lamp to display green, and if not, the step 3 is executed.
In the step 3, the step of,the central control system controls the measuring wheel to stop moving forward and controls the measuring wheel to repeatedly detect the road surface section which is determined to be abnormal within the time t at the speed (namely 3cm/s) consistent with the step 2; obtaining n sections of voltage signal waveform data;
where n is the number of repeated detections and f is the ultrasonic emission frequency.
Step 4, observing the amplitude in the n sections of waveform data, if the amplitude meets the formula 2, judging that the road surface is abnormal due to the damage of the road surface, turning to step 5, otherwise, judging that the road surface is abnormal due to the environmental interference; the central control indicator light displays yellow, and controls the measuring wheel to continue to detect forwards after voltage signal waveform data obtained by repeated measurement is deleted;
in the above formula, AiFor the amplitude in the ith waveform data under test, i is 1, 2, …, n.
Step 5, the central control system acquires the voltage signal waveform data of the road surface judged to be damaged again by adopting a high-density detection mode (the high-density detection mode is that the central control system reduces the rotating speed of the measuring wheel, and the rotating speed of the measuring wheel in the embodiment is 1cm/s, so that the detection density is improved); and the control indicator light is displayed in red.
And 6, after the whole road surface detection is finished, compressing the acquired road surface voltage data waveform and the coordinate information and time information corresponding to the waveform by the central control system, and transmitting the compressed data to a memory.
As shown in fig. 4-5, the main body of the detector in this embodiment is enclosed in a rectangular plastic box, an adjusting knob 7 is installed on the top of the plastic box for adjusting the horizontal running speed of the device, and when the adjusting knob 7 is adjusted to a speed of "0", the device is automatically turned off. The display screen 9 is arranged at the front end of the top of the plastic box and is used for displaying current operation parameters including residual electric quantity, horizontal operation speed, operation mileage, ultrasonic emission frequency, detected time length, signal conditions and current time. The lower end of the top of the plastic box is provided with a button for selecting or inputting the number of repeated measurements when the fluctuations are encountered. Four measuring wheels 8 are arranged at the bottom of the cuboid plastic box, and the rotating speed of the measuring wheels 8 is controlled by a central control system.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (6)
1. A light-weight power-saving scanning type sound wave detector is characterized by comprising a central control system, a power supply, a sending sensor, a receiving sensor, a GPS system, a time system, a memory, low-energy-consumption Bluetooth, a measuring wheel, equipment of a field inspector and an amplifier;
the GPS system and the time system are respectively used for generating coordinate information and time information and sending the coordinate information and the time information to the central control system; the power supply generates voltage under the control of the central control system, and the sending sensor converts an electric signal of the voltage generated by the power supply into ultrasonic waves; the ultrasonic waves are reflected by the ground and then received by a receiving sensor; the receiving sensor converts the ultrasonic waves into alternating charges, and the alternating charges are converted into voltage signal waveform data through the amplifier and transmitted to the central control system; the central control system compares the received voltage signal waveform data with the voltage signal waveform parameters of a normal road surface stored in the central control system to judge whether the road surface is normal, and if the road surface is normal, the central control system controls the measuring wheel to continue to detect forwards; if the road surface is abnormal, the central control system controls the measuring wheel to repeatedly detect the road surface section which is determined to be abnormal, and the voltage signal waveform data obtained by repeated detection is used for judging whether the reason causing the abnormality of the road surface section is road surface damage or environmental interference; if the interference is environmental interference, the central control system controls the measuring wheel to continuously detect the road surface forwards after deleting the waveform data which are repeatedly measured; if the road surface is damaged, the central control system reduces the speed of the measuring wheel and collects the voltage signal waveform data of the road surface judged to be damaged again; after the whole pavement detection is finished, the central control system compresses the acquired voltage signal waveform data and the coordinate information and time information corresponding to the waveform data to obtain compressed data; transmitting the compressed data to a memory; the memory transmits the received compressed data to the equipment of a field inspector by using the low-power Bluetooth;
the reason why the road surface section is abnormal due to the breakage is that the road surface is damaged or the environment is disturbed specifically as follows:
step 3.1: the central control system controls the measuring wheel to repeatedly detect the road surface which is judged to be abnormal within the time t, and n sections of voltage signal waveform data are obtained;
wherein n is the number of repeated detections, and f is the ultrasonic emission frequency;
step 3.2, observing the amplitude in the n sections of waveform data, if the amplitude meets the formula 1-1, judging that the road surface is abnormal due to road surface damage, otherwise, judging that the road surface is abnormal due to environmental interference, displaying yellow by an indicator light, and deleting the n sections of waveforms;
in the above formula, AiFor the amplitude in the ith waveform data under test, i is 1, 2, …, n.
2. The light-duty sweeping acoustic detector of claim 1, wherein said GPS system uses SiRFstar iii chip, said time system uses CMOS chip, said memory uses Intel-2716 chip, said low power bluetooth uses WH-BT200, said central control system uses SandForce SF-2281 chip.
3. A light weight power saving scanning type acoustic wave probe according to claim 1, characterized in that the probe further comprises an indicator light connected to the central control system for displaying different colors in case of normal road surface, environmental disturbance and road surface damage.
4. The light power-saving scanning type acoustic wave detector as claimed in claim 1, wherein the transmitting sensor and the receiving sensor have the same structure, and each sensor comprises a force transmission upper cover, a piezoelectric sheet, an electrode leading-out plug, an insulating material and a base; the force transmission upper cover is buckled with the base, a containing cavity is formed between the force transmission upper cover and the base, electrodes are placed in the containing cavity, piezoelectric patches are respectively placed on the upper portion and the lower portion of each electrode, the electrodes are connected with an electrode leading-out plug in a leading-out mode through the side face of the base, and the electrodes are separated from the base through insulating materials.
5. The light-weight power-saving scanning type acoustic wave detector as claimed in claim 1, wherein the detector further comprises a display screen connected with the central control system for displaying coordinate information, time information and voltage signal waveform data.
6. The detection method of the light power-saving scanning type acoustic wave detector based on claim 3 is characterized by comprising the following steps:
step 1, inputting voltage waveform data of a flat road surface to a central control system as a preset parameter;
step 2, the central control system compares the road surface voltage signal waveform data acquired by the detector with preset parameters to judge whether the road surface is normal or not, if the voltage signal waveform data is within the range of the preset parameters, the road surface is judged to be normal, the central control system controls the measuring wheel to continue to detect forwards and controls the indicator lamp to display green, otherwise, the road surface is judged to be abnormal, and the step 3 is carried out;
step 3, the central control system controls the measuring wheel to stop moving forwards and controls the measuring wheel to repeatedly detect the road surface which is judged to be abnormal at the speed consistent with that in the step 2; the central control system judges whether the reason causing the abnormal road surface section is road surface damage or environmental interference by using voltage signal waveform data obtained by repeated detection; if the interference is environmental interference, the central control system controls the indicator lamp to display yellow and controls the measuring wheel to continue to detect forwards; if the road surface is damaged, the central control system collects the voltage signal waveform data of the road surface judged to be damaged again after reducing the rotating speed of the measuring wheel, and controls the indicator lamp to display red;
and 4, after the whole road surface detection is finished, compressing the acquired road surface voltage data waveform and the coordinate information and time information corresponding to the waveform by the central control system, and transmitting the compressed data to the memory.
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