CN115327549A - Ultrasonic radar system and method for improving reliability thereof - Google Patents
Ultrasonic radar system and method for improving reliability thereof Download PDFInfo
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- CN115327549A CN115327549A CN202210926924.9A CN202210926924A CN115327549A CN 115327549 A CN115327549 A CN 115327549A CN 202210926924 A CN202210926924 A CN 202210926924A CN 115327549 A CN115327549 A CN 115327549A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007613 environmental effect Effects 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000002592 echocardiography Methods 0.000 description 4
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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
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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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)
- Electromagnetism (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a method for improving the reliability of an automobile ultrasonic radar system, which is characterized in that when environmental noise is greater than a preset value, the environmental noise interference is considered to exist, so that the transmitting frequency of the ultrasonic radar system is dynamically adjusted; when the environmental noise is smaller than the preset value, the ultrasonic radar system is considered to have no environmental noise interference, so the ultrasonic radar system continues to transmit at the fixed transmitting frequency. The advantages of the original fixed-frequency transmission are kept, and the advantage of frequency modulation is increased, so that the stability and reliability of the ultrasonic radar system are greatly improved under the condition of maintaining the existing hardware unchanged. The problem of resonance between the vehicle and the ultrasonic radar is solved, and the service life of the ultrasonic radar is prolonged in a phase-changing mode.
Description
Technical Field
The invention relates to the technical field of ultrasonic radars, in particular to an automobile ultrasonic radar system, namely a method for improving the reliability of the automobile ultrasonic radar system.
Background
Along with the improvement of the automatic driving grade of the automobile, the requirement on the reliability of detecting the obstacles by the ultrasonic radar is higher and higher.
The existing ultrasonic system is overlapped with the environmental noise due to the transmitting frequency and the receiving frequency. When the frequency of the ambient noise is the same as the frequency of the ultrasonic transmission, the existing ultrasonic radar system cannot distinguish whether it is an obstacle echo or noise. In addition, as the loading rate of the ultrasonic radar is higher and higher, the probability that vehicles with the same radar product meet is higher. When vehicles equipped with the same radar product meet, the existing radar systems cannot identify external interference or obstacles, and cannot provide reliable alarm for drivers.
In short, the existing ultrasonic system is easily affected by the peripheral environment, and cannot meet the requirement of automatic driving in terms of reliability and stability.
Disclosure of Invention
In view of the problems in the prior art, the present invention is directed to an ultrasonic radar system for an automobile and a method for improving the reliability thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for improving the reliability of an ultrasonic radar system comprises the following steps when the ultrasonic radar system works:
step 1, electrifying a system, controlling an ultrasonic radar chip to emit waves at a central frequency, and detecting surrounding environment noise in real time;
step 2, when the noise existing in the surrounding environment is detected and is larger than a preset value, the transmitting frequency of the ultrasonic radar chip is adjusted downwards, and the ultrasonic waves are transmitted at the adjusted transmitting frequency; continuously detecting ambient noise, and if the noise is larger than a preset value, continuously adjusting the transmitting frequency downwards until the interference is minimum; if the noise is still larger than the preset value when the minimum frequency of the ultrasonic radar chip is adjusted, the transmitting frequency of the ultrasonic radar chip is adjusted upwards until the interference is minimum;
when the interference is minimum, the environmental noise is smaller than a preset value, and the ultrasonic radar chip emits ultrasonic waves at a fixed frequency.
An automotive ultrasonic radar system, the system comprising
The noise detection module is used for detecting the ambient noise in real time when the ultrasonic radar system works;
the noise judgment module is used for judging whether the detected environmental noise exceeds a preset value;
and the transmitting frequency adjusting module is used for adjusting the transmitting frequency of the ultrasonic radar chip when the environmental noise exceeds a preset value and controlling the ultrasonic radar chip to transmit the ultrasonic waves at a fixed frequency when the environmental noise is smaller than the preset value.
The method for adjusting the wave-transmitting frequency by the transmitting frequency adjusting module comprises the following steps:
when the noise in the surrounding environment is detected to be larger than a preset value, the transmitting frequency of the ultrasonic radar chip is adjusted downwards, and the ultrasonic waves are transmitted at the adjusted transmitting frequency; continuously detecting the ambient noise, and if the noise is greater than a preset value, continuously adjusting the transmitting frequency downwards until the interference is minimum; and if the noise is still larger than the preset value when the minimum frequency of the ultrasonic radar chip is adjusted, adjusting the transmitting frequency of the ultrasonic radar chip upwards until the noise is smaller than the preset value.
After the scheme is adopted, when the environmental noise is greater than the preset value, the interference of the environmental noise is considered to exist, so that the transmitting frequency of the ultrasonic radar system is dynamically adjusted; when the environmental noise is smaller than the preset value, the ultrasonic radar system is considered to have no environmental noise interference, so the ultrasonic radar system continues to transmit at the fixed transmitting frequency. The advantages of the original fixed-frequency transmission are kept, and the advantage of frequency modulation is increased, so that the stability and reliability of the ultrasonic radar system are greatly improved under the condition of maintaining the existing hardware unchanged. The problem of resonance between the vehicle and the ultrasonic radar is solved, and the service life of the ultrasonic radar is prolonged in a phase-changing mode.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
As shown in fig. 1, the present invention discloses a method for improving the reliability of an ultrasonic radar system for a vehicle, when the ultrasonic radar system works, the following processing is carried out:
step 1, electrifying a system, controlling an ultrasonic radar chip to emit waves at a central frequency, and detecting surrounding environment noise in real time;
whether noise exists in the surrounding environment can be judged by the following conditions: the number of echoes, the echo width, the background noise information returned by the ultrasonic chip, and the like.
After the ultrasonic radar transmits ultrasonic waves, the receiving mode is entered, and the number of received echoes and the total echo width are calculated. And when the number of the echoes received by the ultrasonic radar in a wave transmitting period or the total echo width is larger than a set threshold value, the noise interference exists in the surrounding environment.
In addition, some ultrasonic chips can automatically detect the background noise information of the surrounding environment after transmitting ultrasonic waves, and when the detected background noise exceeds a set threshold value, the surrounding environment of the ultrasonic radar system is informed of noise interference through the bus.
Step 2, when detecting that noise exists in the surrounding environment and is larger than a preset value, adjusting the transmitting frequency of the ultrasonic radar chip downwards to transmit ultrasonic waves at the adjusted transmitting frequency; continuously detecting the ambient noise, and if the noise is greater than a preset value, continuously adjusting the transmitting frequency downwards until the interference is minimum; if the noise is still larger than the preset value when the minimum frequency of the ultrasonic radar chip is adjusted, adjusting the transmitting frequency of the ultrasonic radar chip upwards until the interference is minimum;
when the interference is minimum, the environmental noise is smaller than a preset value, and the ultrasonic radar chip transmits ultrasonic waves at a fixed frequency.
The system informs the ultrasonic radar chip through a communication bus to send waves at the frequency set by the system. For example: the wave-transmitting frequency range of the ultrasonic radar chip is 30kHz-75kHz, the system initially transmits waves by using the frequency of 55kHz (the frequency is the central frequency of the ultrasonic radar, and the system transmits waves by using the frequency after being electrified), and when the existence of noise in the surrounding environment is detected, the ultrasonic radar chip is informed to transmit waves by using the frequency of 48kHz through the communication bus. After receiving the command, the ultrasonic radar chip sends out waves at the frequency of 48 kHz. If the noise of the surrounding environment is detected at the moment, the communication bus informs the ultrasonic radar to send waves at the frequency of 45kHz, and after the ultrasonic radar chip receives the command, the ultrasonic radar chip sends waves at the frequency of 45 kHz.
And when the width and the number of the detected echoes are smaller than the set threshold, the interference is considered to be minimum, the frequency modulation is not carried out any more, and the ultrasonic waves are transmitted at the finally adjusted frequency. For example, if the ultrasonic radar chip emits the ultrasonic wave at a frequency of 45kHz with minimum interference, the ultrasonic wave is then emitted at a frequency of 45 kHz.
If the wave transmitting frequency of the ultrasonic radar chip is adjusted to 30kHz, and the detected noise is still larger than the preset value, the wave transmitting frequency of the ultrasonic radar chip is adjusted within the range of 55kHz-75kHz until the interference is minimum.
Based on the same inventive concept, the invention also discloses an automobile ultrasonic radar system, which comprises
The noise detection module is used for detecting the ambient noise in real time when the ultrasonic radar system works;
the noise judgment module is used for judging whether the detected environmental noise exceeds a preset value;
and the transmitting frequency adjusting module is used for adjusting the transmitting frequency of the ultrasonic radar chip when the environmental noise exceeds a preset value and controlling the ultrasonic radar chip to transmit the ultrasonic waves at a fixed frequency when the environmental noise is smaller than the preset value.
The method for adjusting the wave-transmitting frequency by the transmitting frequency adjusting module comprises the following steps:
when the noise in the surrounding environment is detected to be larger than a preset value, the transmitting frequency of the ultrasonic radar chip is adjusted downwards, and the ultrasonic waves are transmitted at the adjusted transmitting frequency; continuously detecting ambient noise, and if the noise is larger than a preset value, continuously adjusting the transmitting frequency downwards until the interference is minimum; and if the noise is still greater than the preset value when the minimum frequency of the ultrasonic radar chip is adjusted, adjusting the transmitting frequency of the ultrasonic radar chip upwards until the noise is less than the preset value.
When the environmental noise is greater than the preset value, the interference of the environmental noise is considered to exist, so that the transmitting frequency of the ultrasonic radar system is dynamically adjusted; when the environmental noise is smaller than the preset value, the ultrasonic radar system is considered to have no environmental noise interference, so the ultrasonic radar system continues to transmit at the fixed transmitting frequency. The advantages of the original fixed-frequency transmission are kept, and the advantage of frequency modulation is increased, so that the stability and reliability of the ultrasonic radar system are greatly improved under the condition of maintaining the existing hardware unchanged. The problem of resonance between the vehicle and the ultrasonic radar is also solved, and the service life of the ultrasonic radar is also improved in a phase-changing manner.
The above description is only exemplary of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above exemplary embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (3)
1. A method for improving the reliability of an ultrasonic radar system is characterized in that: when the ultrasonic radar system works, the method performs the following processing:
step 1, electrifying a system, controlling an ultrasonic radar chip to emit waves at a central frequency, and detecting surrounding environment noise in real time;
step 2, when detecting that noise exists in the surrounding environment and is larger than a preset value, adjusting the transmitting frequency of the ultrasonic radar chip downwards to transmit ultrasonic waves at the adjusted transmitting frequency; continuously detecting ambient noise, and if the noise is larger than a preset value, continuously adjusting the transmitting frequency downwards until the interference is minimum; if the noise is still larger than the preset value when the minimum frequency of the ultrasonic radar chip is adjusted, adjusting the transmitting frequency of the ultrasonic radar chip upwards until the interference is minimum;
when the interference is minimum, the environmental noise is smaller than a preset value, and the ultrasonic radar chip emits ultrasonic waves at a fixed frequency.
2. An automotive ultrasonic radar system, characterized in that: the system comprises
The noise detection module is used for detecting the ambient noise in real time when the ultrasonic radar system works;
the noise judgment module is used for judging whether the detected environmental noise exceeds a preset value;
and the transmitting frequency adjusting module is used for adjusting the transmitting frequency of the ultrasonic radar chip when the environmental noise exceeds a preset value and controlling the ultrasonic radar chip to transmit the ultrasonic waves at a fixed frequency when the environmental noise is smaller than the preset value.
3. An automotive ultrasonic radar system according to claim 2, characterized in that: the method for adjusting the wave-transmitting frequency by the transmitting frequency adjusting module comprises the following steps:
when the noise in the surrounding environment is detected to be larger than a preset value, the transmitting frequency of the ultrasonic radar chip is adjusted downwards, and the ultrasonic waves are transmitted at the adjusted transmitting frequency; continuously detecting the ambient noise, and if the noise is greater than a preset value, continuously adjusting the transmitting frequency downwards until the interference is minimum; and if the noise is still larger than the preset value when the minimum frequency of the ultrasonic radar chip is adjusted, adjusting the transmitting frequency of the ultrasonic radar chip upwards until the noise is smaller than the preset value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210926924.9A CN115327549A (en) | 2022-08-03 | 2022-08-03 | Ultrasonic radar system and method for improving reliability thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210926924.9A CN115327549A (en) | 2022-08-03 | 2022-08-03 | Ultrasonic radar system and method for improving reliability thereof |
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| CN115327549A true CN115327549A (en) | 2022-11-11 |
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| US6678209B1 (en) * | 2001-11-21 | 2004-01-13 | Luc Peng | Apparatus and method for detecting sonar signals in a noisy environment |
| CN1819496A (en) * | 2006-03-09 | 2006-08-16 | 武汉大学 | Method for realizing frequency monitoring by high-frequency radar receiver |
| JP2007088805A (en) * | 2005-09-22 | 2007-04-05 | Sanyo Electric Co Ltd | Ultrasonic radar |
| CN101271159A (en) * | 2007-03-20 | 2008-09-24 | 株式会社电装 | Interference detection method in radar system and radar using the method |
| CN103033797A (en) * | 2012-12-17 | 2013-04-10 | 西安电子工程研究所 | Metrewave radar self-adaption frequency selection method based on spatial filtering |
| CN203133274U (en) * | 2013-03-27 | 2013-08-14 | 武汉大学 | Ambient noise monitoring system based on all-digital high-frequency radar |
| CN106461771A (en) * | 2014-05-26 | 2017-02-22 | 株式会社电装 | Vehicle-mounted radar device |
| CN109696664A (en) * | 2019-01-07 | 2019-04-30 | 广州小鹏汽车科技有限公司 | A kind of detection method and detection device of ultrasonic wave co-channel interference |
| CN113567937A (en) * | 2021-08-06 | 2021-10-29 | 广州小鹏汽车科技有限公司 | Vehicle-mounted radar anti-interference method, device, equipment and system |
-
2022
- 2022-08-03 CN CN202210926924.9A patent/CN115327549A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6678209B1 (en) * | 2001-11-21 | 2004-01-13 | Luc Peng | Apparatus and method for detecting sonar signals in a noisy environment |
| JP2007088805A (en) * | 2005-09-22 | 2007-04-05 | Sanyo Electric Co Ltd | Ultrasonic radar |
| CN1819496A (en) * | 2006-03-09 | 2006-08-16 | 武汉大学 | Method for realizing frequency monitoring by high-frequency radar receiver |
| CN101271159A (en) * | 2007-03-20 | 2008-09-24 | 株式会社电装 | Interference detection method in radar system and radar using the method |
| CN103033797A (en) * | 2012-12-17 | 2013-04-10 | 西安电子工程研究所 | Metrewave radar self-adaption frequency selection method based on spatial filtering |
| CN203133274U (en) * | 2013-03-27 | 2013-08-14 | 武汉大学 | Ambient noise monitoring system based on all-digital high-frequency radar |
| CN106461771A (en) * | 2014-05-26 | 2017-02-22 | 株式会社电装 | Vehicle-mounted radar device |
| US20170153315A1 (en) * | 2014-05-26 | 2017-06-01 | Denso Corporation | In-vehicle radar apparatus |
| CN109696664A (en) * | 2019-01-07 | 2019-04-30 | 广州小鹏汽车科技有限公司 | A kind of detection method and detection device of ultrasonic wave co-channel interference |
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Application publication date: 20221111 |