CN115407341A - Digital ultrasonic sensor ranging system without blind area - Google Patents
Digital ultrasonic sensor ranging system without blind area Download PDFInfo
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- CN115407341A CN115407341A CN202210914147.6A CN202210914147A CN115407341A CN 115407341 A CN115407341 A CN 115407341A CN 202210914147 A CN202210914147 A CN 202210914147A CN 115407341 A CN115407341 A CN 115407341A
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- wave
- core
- probe core
- integrated circuit
- asic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/534—Details of non-pulse systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention provides a digital ultrasonic sensor ranging system without a blind area, which comprises an ASIC integrated circuit, a wave transmitting probe core and a wave receiving probe core, wherein the ASIC integrated circuit is connected with the wave transmitting probe core; the ASIC integrated circuit, namely a sensor peripheral circuit, is connected with the wave transmitting probe core through a driving pin and is connected with the wave receiving probe core through a signal input pin; the wave-transmitting probe core transmits ultrasonic waves, and the wave-receiving probe core receives the ultrasonic waves. The digital ultrasonic sensor ranging system without the blind area provided by the invention has the advantages that two probe cores work simultaneously, one probe core transmits waves through an ASIC integrated circuit, and the other probe core receives waves through the resonance of echo waves, so that the use of ultrasonic waves is realized, interference signals generated by the aftershock of the probe cores are not received, the detection blind area of the sensor is greatly reduced, a processor does not need to process redundant waveforms, the filtered electrical model can be directly calculated to obtain digital signals, the calculation amount of the processor is reduced, and the use efficiency and the sensitivity of the sensor are improved.
Description
Technical Field
The invention relates to a digital ultrasonic sensor ranging system without a blind area.
Background
The ultrasonic sensor ranging system product is a vehicle-mounted electronic device which can directly provide distance information between a vehicle and an obstacle for a driver or an electric control unit. The method is applied to the scenes of auxiliary parking, door opening and obstacle avoidance, in-vehicle living body detection and the like under low-speed operation.
After the ultrasonic sensor is digitized, the sensor is usually implemented by using an ultrasonic Application Specific Integrated Circuit (ASIC), a peripheral circuit and an ultrasonic probe core for receiving and transmitting waves. When the ultrasonic sensor using the scheme works, a certain detection blind area can be caused due to the existence of the aftershock of the core probe, and the range of the blind area is generally within 15-25cm, and some blind areas are larger. The obstacles in the detection blind area can not be effectively identified. Such missed detection may cause the collision of the vehicle with an obstacle, etc., which may result in the life safety or property loss of people inside or outside the vehicle.
When the traditional ultrasonic sensor is used, the reflected signal and the aftershock interference signal need to be compared and removed by adopting a preset amplitude threshold value, so that the distance measurement can be effectively processed, the processor is required to process the echo constantly, the efficiency of data processing is influenced, and when the distance between an obstacle and the sensor is less than 15-25cm, the phenomenon that the aftershock interference cannot be eliminated can occur, namely, a blind area is generated, and the sensor cannot be normally used.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the digital ultrasonic sensor ranging system without the blind area performs exemplified detection in a mode of separating receiving and transmitting waves, reduces the detection blind area by utilizing the simultaneous working of two detection cores, and solves the physical reason which cannot be removed.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a digital ultrasonic sensor distance measuring system without blind areas comprises an ASIC integrated circuit, a wave transmitting probe core and a wave receiving probe core; the ASIC integrated circuit, namely a sensor peripheral circuit, is connected with the wave-transmitting probe core through a driving pin and is connected with the wave-receiving probe core through a signal input pin; the wave-transmitting probe core transmits ultrasonic waves, and the wave-receiving probe core receives the ultrasonic waves;
when the system works, the ASIC integrated circuit drives the wave-emitting probe core through the driving pin to cause the wave-emitting probe core to vibrate and emit ultrasonic waves; and meanwhile, the wave receiving probe core generates resonance according to the returned ultrasonic waves to perform echo, the echo converts ultrasonic wave data into an electric signal through the signal input pin and inputs the electric signal into the ASIC integrated circuit, and the digital signal is output outwards after the processing of the ASIC integrated circuit, so that the function of distance measurement is realized.
Furthermore, a damping resistor and a voltage converter are connected between the wave-emitting probe core and the ASIC integrated circuit, and the voltage converter converts a voltage signal in the ASIC integrated circuit into a physical vibration signal of the wave-emitting probe core, so that the wave-emitting probe core generates vibration and emits ultrasonic waves.
Furthermore, an alternating current coupling and filtering circuit is connected between the wave-receiving probe core and the ASIC integrated circuit, converts the resonance signal of the wave-receiving probe core into a voltage signal, and simultaneously carries out filtering processing on the voltage signal, so as to reduce redundant useless signals and then transmits the redundant useless signals to the ASIC integrated circuit.
Furthermore, the ASIC integrated circuit is connected with a digital processor, converts the received voltage signal into a digital signal through calculation, and directly outputs the detected distance data.
Further, the digital processor calculates the flight time of the ultrasonic wave according to the waveform of the voltage signal, and then calculates the relative distance by using the sound velocity, so as to obtain the distance between the obstacle and the sensor.
Furthermore, the ASIC integrated circuit is made of an ultrasonic special sensor.
Furthermore, the wave transmitting probe core and the wave receiving probe core are same-frequency probe cores.
Furthermore, the center distance between the wave transmitting probe core and the wave receiving probe core is 15-100mm.
Compared with the prior art, the digital ultrasonic sensor ranging system without the blind area provided by the invention has the advantages that two probe cores work simultaneously, one probe core transmits waves through an ASIC integrated circuit, and the other probe core receives waves through the resonance of echo waves, so that the use of ultrasonic waves is realized, interference signals generated by the aftershock of the probe cores cannot be received, the detection blind area of the sensor is greatly reduced, meanwhile, a processor does not need to process redundant waveforms, the filtered electrical model can be directly calculated to obtain digital signals, the calculation amount of the processor is reduced, and the use efficiency and the sensitivity of the sensor are improved.
Description of the drawings:
figure 1 shows a system schematic of the present invention.
Fig. 2 shows a waveform diagram of the present invention.
Wherein: 1, ASIC integrated circuit, 2, sending wave probe core, 3, receiving wave probe core, 4, damping resistor, 5, voltage converter, 6, AC coupling and filter circuit, and 7, digital processor.
Detailed Description
A digital ultrasonic sensor distance measuring system without blind area comprises an ASIC integrated circuit 1, a wave transmitting probe core 2 and a wave receiving probe core 3; the ASIC integrated circuit 1, namely a sensor peripheral circuit, is connected with the wave transmitting probe core 2 through a driving pin and is connected with the wave receiving probe core 3 through a signal input pin; the wave-transmitting probe core 2 transmits ultrasonic waves, and the wave-receiving probe core 3 receives the ultrasonic waves;
when the system works, the ASIC integrated circuit 1 drives the wave-emitting probe core 2 through a driving pin to cause the wave-emitting probe core 2 to vibrate and emit ultrasonic waves; meanwhile, the wave receiving probe core 3 generates resonance according to the returned ultrasonic waves to perform echo, the echo converts ultrasonic wave data into an electric signal through the signal input pin and inputs the electric signal into the ASIC integrated circuit 1, and the digital signal is output outwards after the processing of the ASIC integrated circuit 1, so that the function of distance measurement is realized.
Further, a damping resistor 4 and a voltage converter 5 are connected between the wave-emitting probe core 2 and the ASIC integrated circuit 1, and the voltage converter 5 converts a voltage signal in the ASIC integrated circuit 1 into a physical vibration signal of the wave-emitting probe core 2, so that the wave-emitting probe core generates vibration and emits ultrasonic waves.
Further, an ac coupling and filtering circuit 6 is connected between the wave-receiving probe core 3 and the ASIC integrated circuit 1, the ac coupling and filtering circuit 6 converts the resonance signal of the wave-receiving probe core 3 into a voltage signal, and simultaneously performs filtering processing on the voltage signal to reduce redundant and useless signals, and then transmits the redundant and useless signals to the ASIC integrated circuit 1.
Furthermore, the ASIC integrated circuit 1 is connected to a digital processor 7, which converts the received voltage signal into a digital signal by calculation, and directly outputs the detected distance data.
Further, the digital processor 7 calculates the flight time of the ultrasonic wave according to the waveform of the voltage signal, and then calculates the relative distance by using the sound velocity, so as to obtain the distance from the obstacle to the sensor.
Further, the ASIC integrated circuit 1 is made of an ultrasonic sensor, for example, model number ELMOS E524.09A.
Furthermore, the wave transmitting probe core 2 and the wave receiving probe core 3 are same-frequency probe cores.
Furthermore, the center distance between the wave transmitting probe core 2 and the wave receiving probe core 3 is 15-100mm, the distance is not too large, the wave receiving time of the wave receiving probe core 3 is prevented from being too long, and the calculated amount and the processing time are increased.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (8)
1.A digital ultrasonic sensor distance measuring system without blind areas is characterized by comprising an ASIC integrated circuit, a wave transmitting probe core and a wave receiving probe core; the ASIC integrated circuit, namely a sensor peripheral circuit, is connected with the wave transmitting probe core through a driving pin and is connected with the wave receiving probe core through a signal input pin; the wave-transmitting probe core transmits ultrasonic waves, and the wave-receiving probe core receives the ultrasonic waves;
when the system works, the ASIC integrated circuit drives the wave-emitting probe core through the driving pin to cause the wave-emitting probe core to vibrate and emit ultrasonic waves; and meanwhile, the wave receiving probe core generates resonance according to the returned ultrasonic waves to perform echo, the echo converts ultrasonic wave data into an electric signal through the signal input pin and inputs the electric signal into the ASIC integrated circuit, and the digital signal is output outwards after the processing of the ASIC integrated circuit, so that the function of distance measurement is realized.
2. The system of claim 1, wherein a damping resistor and a voltage converter are connected between the core and the ASIC, and the voltage converter converts a voltage signal in the ASIC into a physical vibration signal of the core, thereby generating vibration and emitting ultrasonic waves.
3. The system of claim 1, wherein an ac coupling and filter circuit is connected between the core and the ASIC ic, and the ac coupling and filter circuit converts the resonant signal of the core into a voltage signal, and filters the voltage signal to reduce the redundant and useless signals, and transmits the signal to the ASIC ic.
4. The system of claim 1, wherein the ASIC integrated circuit is connected to a digital processor, and converts the received voltage signal into a digital signal by calculation, and directly outputs the detected distance data.
5. The system of claim 4, wherein the digital processor calculates the time of flight of the ultrasonic wave according to the waveform of the voltage signal, and then calculates the relative distance by using the speed of sound, thereby obtaining the distance between the obstacle and the sensor.
6. The system of claim 1, wherein the ASIC integrated circuit is made of an ultrasound dedicated sensor.
7. The system of claim 1, wherein the transmitting core and the receiving core are co-frequency cores.
8. The system of claim 1, wherein the distance between the center of the transmitting core and the center of the receiving core is 15-100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210914147.6A CN115407341A (en) | 2022-08-01 | 2022-08-01 | Digital ultrasonic sensor ranging system without blind area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210914147.6A CN115407341A (en) | 2022-08-01 | 2022-08-01 | Digital ultrasonic sensor ranging system without blind area |
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| CN115407341A true CN115407341A (en) | 2022-11-29 |
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| CN202210914147.6A Pending CN115407341A (en) | 2022-08-01 | 2022-08-01 | Digital ultrasonic sensor ranging system without blind area |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633655A (en) * | 2018-12-29 | 2019-04-16 | 肇庆奥迪威传感科技有限公司 | Ultrasonic ranging method and supersonic range finder |
| CN111983621A (en) * | 2020-08-11 | 2020-11-24 | 重庆大学 | An Ultrasonic Ranging Method Without Blind Spots |
| CN113534704A (en) * | 2021-07-08 | 2021-10-22 | 辉创电子科技(苏州)有限公司 | System and process for detecting foreign matters on surface of ultrasonic sensor |
| CN214895794U (en) * | 2021-07-19 | 2021-11-26 | 辉创电子科技(苏州)有限公司 | System for detecting ultrasonic reversing radar probe top frequency and tail warping phenomenon |
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2022
- 2022-08-01 CN CN202210914147.6A patent/CN115407341A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633655A (en) * | 2018-12-29 | 2019-04-16 | 肇庆奥迪威传感科技有限公司 | Ultrasonic ranging method and supersonic range finder |
| CN111983621A (en) * | 2020-08-11 | 2020-11-24 | 重庆大学 | An Ultrasonic Ranging Method Without Blind Spots |
| CN113534704A (en) * | 2021-07-08 | 2021-10-22 | 辉创电子科技(苏州)有限公司 | System and process for detecting foreign matters on surface of ultrasonic sensor |
| CN214895794U (en) * | 2021-07-19 | 2021-11-26 | 辉创电子科技(苏州)有限公司 | System for detecting ultrasonic reversing radar probe top frequency and tail warping phenomenon |
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