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Signal processing method and device, active sensor and storage medium

A signal processing and sensor technology, applied in measurement devices, instruments, and re-radiation, etc., can solve problems such as echo interference, ultrasonic sensor interference, and distance measurement failure, so as to improve the accuracy of distance measurement and achieve effective and accurate distance detection. Effect

Active Publication Date: 2021-08-27
APOLLO INTELLIGENT DRIVING (BEIJING) TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has the following defects: ultrasonic sensors are susceptible to external noise and sound waves, especially when multiple ultrasonic sensors work in parallel, echo interference is prone to occur, resulting in failure of distance measurement

Method used

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  • Signal processing method and device, active sensor and storage medium
  • Signal processing method and device, active sensor and storage medium
  • Signal processing method and device, active sensor and storage medium

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Experimental program
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Embodiment 1

[0028] Figure 1a It is a flow chart of a signal processing method provided by Embodiment 1 of the present invention. The method of this embodiment can be executed by a signal processing device, which can be implemented by means of hardware and / or software, and can generally be integrated into an active sensor In, such as ultrasonic sensors, etc. The method of this embodiment specifically includes:

[0029] S110. Convert the received dynamically changing sensor identification information into an identification signal, where the identification signal corresponds to the sensor identification information.

[0030] In this embodiment, the active sensor specifically refers to a sensor that is installed on the self-driving vehicle, actively sends a test signal by itself, and obtains information according to the feedback signal of the test signal, and can typically be an ultrasonic sensor.

[0031] In this embodiment, the sensor identification information specifically refers to the ...

Embodiment 2

[0056] figure 2 It is a flowchart of a signal processing method provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above-mentioned embodiments. In this embodiment, a method of generating specific sensor identification information is given, and the steps for judging whether the specific feedback signal corresponds to the transmitted signal are provided, and the number of sensor identification information is increased. The step of judging the failure time, the step of adding the distance to determine and the specific implementation of the unique identification method of the specific sensor identification information.

[0057] Correspondingly, the method in this embodiment specifically includes:

[0058] S210 , judging whether the expiration time of the received sensor identification information is reached, if the expiration time is not reached, perform step 240 , and if the expiration time has been reached, execute step 220 .

...

Embodiment 3

[0082] image 3 It is a structural diagram of a signal processing device provided in Embodiment 3 of the present invention. Such as image 3 As shown, the device includes: an identification signal generation module 301, a signal superposition module 302, and a signal comparison module 303, wherein:

[0083] An identification signal generating module 301, configured to convert the received dynamically changing sensor identification information into an identification signal, wherein the identification signal corresponds to the sensor identification information;

[0084] The signal superposition module 302 is used to superimpose the measurement signal and the identification signal to form a transmission signal and transmit it, wherein the duration of the identification signal matches the duration of the measurement signal;

[0085] The signal comparison module 303 is configured to determine whether the feedback signal corresponds to the transmitted signal according to the ident...

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Abstract

The embodiment of the invention discloses a signal processing method and device, an active sensor and a storage medium. The method includes: converting the received dynamically changing sensor identification information into an identification signal, the identification signal corresponding to the sensor identification information; superimposing the measurement signal and the identification signal to form a transmission signal and transmitting it, and the duration of the identification signal is related to the measurement The duration of the signal is matched; according to the identification signal and the identification signal to be identified obtained from the received feedback signal, it is determined whether the feedback signal corresponds to the transmitted signal. The technical solution of the embodiment of the present invention solves the technical defect of echo interference between multiple adjacent active sensors in the prior art, which leads to the failure of ranging and reduces the ranging accuracy of the active sensor, and realizes the detection of the self-echo by the active sensor. Effective and accurate identification, and then effective and accurate distance detection for the reflecting object corresponding to the echo, which improves the ranging accuracy of the active sensor.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of anti-jamming sensors, and in particular, to a signal processing method and device, an active sensor, and a storage medium. Background technique [0002] An unmanned vehicle is a new type of smart car. It mainly perceives the surrounding environment of the vehicle and the state information of the vehicle itself through various sensors, and makes corresponding decision-making plans. Realize the fully automatic operation of the vehicle and achieve the purpose of unmanned driving. [0003] Obstacle detection is one of the essential functions for autonomous vehicles. In view of the fact that the distance measurement working principle of the ultrasonic sensor is relatively simple and is not subject to interference from ambient light, it is widely used in unmanned vehicles to detect the distance of objects around the unmanned vehicle. [0004] In the process of realizing the present inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/08G01S7/539G01S7/52
Inventor 李小华胡太群
Owner APOLLO INTELLIGENT DRIVING (BEIJING) TECHNOLOGY CO LTD