CN-121989862-A - Low-power consumption monitoring and detecting method and circuit

CN121989862ACN 121989862 ACN121989862 ACN 121989862ACN-121989862-A

Abstract

The invention provides a low-power consumption monitoring and detecting method and a circuit, which comprise the steps of detecting physical collision of a vehicle in parking through a plurality of piezoelectric sensors arranged at different positions of the vehicle, generating an analog voltage signal, starting first-stage judgment, detecting the analog voltage signal, judging whether an effective vehicle collision event occurs or not by combining a signal threshold value, and executing second-stage judgment based on vehicle looking-around image data when the effective vehicle collision event occurs. Because the piezoelectric sensor only generates an analog voltage signal after being collided, and only when judging that the analog voltage signal represents that an effective vehicle collision event occurs, the piezoelectric sensor can execute second-stage judgment based on vehicle looking-around image data, compared with an ultrasonic radar or a vibration sensor, the piezoelectric sensor can effectively reduce the power consumption of a monitoring system, reduce unnecessary video and storage and prolong the standby time of the system.

Inventors

SUN KAIJIN
ZHANG JIANER
Xu Zulong

Assignees

万通智控科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260408

Claims (10)

1. The low-power consumption monitoring and detecting method is characterized by comprising the following steps of: detecting physical collision of the vehicle during parking through a plurality of piezoelectric sensors arranged at different positions of the vehicle, and generating an analog voltage signal; Starting a first-stage judgment, detecting the analog voltage signal, and judging whether an effective vehicle collision event occurs or not by combining a signal threshold value; performing a second level of judgment based on vehicle looking around image data when the valid vehicle collision event occurs; When the vehicle is in a parking monitoring standby state and the analog voltage signal is not generated, the first-stage judging controller is in a low-power-consumption mode working state, and the second-stage judging controller is in a non-working state.
2. The method for monitoring and detecting low power consumption according to claim 1, wherein the detecting physical collision of the vehicle during parking by a plurality of piezoelectric sensors disposed at different portions of the vehicle, generating the analog voltage signal, comprises: Forming a plurality of detection channels through analog front ends and operational circuits which are in one-to-one correspondence with a plurality of piezoelectric sensors; The physical collision of different parts of the vehicle is respectively converted into analog voltage signals through the detection channels; and judging the threshold value of the analog voltage signal, and determining whether the physical collision is a valid vehicle collision event.
3. The method of claim 2, wherein the detecting the analog voltage signal in combination with a signal threshold to determine whether a valid vehicle collision event has occurred comprises: determining the collision part of the physical collision of the vehicle through the number of the detection channel; Inquiring a pressure threshold corresponding to a collision part of a vehicle in the association relation between the collision part and the pressure threshold; and when the analog voltage signal is larger than the pressure threshold value corresponding to the collision part, determining that the collision part has an effective vehicle collision event.
4. The low power consumption monitoring and detection method according to claim 3, wherein after determining that the collision portion has a valid vehicle collision event, further comprising: When the analog voltage signal is smaller than a preset threshold value, judging a general collision event, and starting a camera associated with the triggered piezoelectric sensor; And when the analog voltage signal is larger than or equal to the preset threshold value, judging that the analog voltage signal is a strong impact event, and starting all cameras.
5. The low power consumption monitoring detection method according to claim 4, wherein the performing of the second-stage judgment based on the vehicle-surrounding image data includes: a plurality of camera modules are arranged corresponding to the piezoelectric sensors, and monitoring pictures corresponding to the vehicle parts are collected; judging whether the monitoring picture is abnormal risk behavior, and continuously monitoring and notifying the vehicle owner through the T-BOX when the monitoring picture is determined to be the abnormal risk behavior.
6. The low power consumption monitoring detection method of claim 5, wherein the activating a camera associated with a triggered piezoelectric sensor comprises: selectively starting one or more cameras associated with a specific part of a vehicle in the plurality of camera modules according to the specific part of the vehicle by the triggered piezoelectric sensor; Wherein, the association relation is: the piezoelectric sensor arranged on the front bumper, the front hatch cover or the front windshield is associated to start the forward camera; the piezoelectric sensor arranged on the left front door, the left rear door or the left front fender is associated to start the left camera; The piezoelectric sensor arranged on the right front door, the right rear door or the right front fender is associated to start the right side camera; The piezoelectric sensor arranged on the rear bumper, the rear hatch cover or the rear windshield is associated with a rear camera; The piezoelectric sensor arranged on the roof is associated to start all cameras.
7. The method of claim 6, wherein selectively activating one or more cameras of the plurality of camera modules associated with the particular location comprises: when the triggered piezoelectric sensor is positioned on the left front fender, the front camera and the left camera are started in a correlated mode; when the triggered piezoelectric sensor is positioned on the right front fender, the front camera and the right camera are started in a correlated mode; When the triggered piezoelectric sensor is positioned on the left rear fender, the left camera and the backward camera are started in a correlated mode; When the triggered piezoelectric sensor is positioned on the right rear fender, the right camera and the backward camera are started in a correlated mode.
8. The method of claim 5, wherein the determining whether the monitor screen is an abnormal risk behavior comprises: Decoding the monitoring picture in real time, and analyzing the behavior, the gesture and whether a tool is held or not of the person in the picture by utilizing an AI reasoning engine; extracting waveform characteristics of the ADC data stream during the first-stage judgment; And combining the abnormal behavior analysis and the waveform characteristics to judge that the vehicle collision event is malicious damage or unintentional collision.
9. The low-power consumption monitoring and detecting circuit is characterized by comprising a piezoelectric sensor, a low-power consumption microcontroller and an artificial intelligent system-on-chip; The piezoelectric sensors are arranged at different parts of the vehicle and used for detecting physical collision of the vehicle during parking and generating analog voltage signals; the low-power consumption microcontroller is used for detecting the analog voltage signal and judging whether an effective vehicle collision event occurs or not by combining a signal threshold value; the artificial intelligence system-on-a-chip is used for executing second-stage judgment based on vehicle looking-around image data when the effective vehicle collision event occurs; When the vehicle is in a parking monitoring standby state, the low-power-consumption microcontroller is in a low-power-consumption mode working state, and the artificial intelligent system-on-a-chip is in a non-working state.
10. The low power monitor and detection circuit of claim 9, wherein the ADC channel polling under sleep time period inside the low power microcontroller is less than 1ms, the operating current is less than 100 microamps, and the wake-up time is less than 100 microseconds.

Description

Low-power consumption monitoring and detecting method and circuit Technical Field The invention relates to the technical field of vehicle safety monitoring, in particular to a low-power consumption monitoring detection method and a low-power consumption monitoring detection circuit. Background With the increasing degree of intelligence in automobiles, the need for safety monitoring (i.e. "sentinel mode") of the vehicle in a parked state is becoming increasingly prominent. The current mainstream solution is a 'sentinel mode', which mainly depends on two technical routes, ultrasonic radar detection and G-SENSOR or vibration SENSOR based. Whether ultrasonic radar detection or G-SENSOR or vibration based SENSORs, event monitoring is typically performed using either continuously operating or high frequency periodic operating SENSORs with a processing unit. However, the core unit responsible for signal acquisition, processing and judgment needs to be in a high-power-consumption working state continuously or frequently so as to ensure the real-time monitoring performance, and the standby power consumption and the running power consumption of the system are high. Disclosure of Invention The invention provides a low-power consumption monitoring detection method and a circuit, which are used for solving the defect of higher power consumption caused by the fact that a monitoring sensor signal acquisition and processing unit in a sentinel mode needs to be in a working state with high power consumption continuously or frequently in the prior art. The invention provides a low-power consumption monitoring and detecting method, which comprises the following steps: detecting physical collision of the vehicle during parking through a plurality of piezoelectric sensors arranged at different positions of the vehicle, and generating an analog voltage signal; Starting a first-stage judgment, detecting the analog voltage signal, and judging whether an effective vehicle collision event occurs or not by combining a signal threshold value; performing a second level of judgment based on vehicle looking around image data when the valid vehicle collision event occurs; When the vehicle is in a parking monitoring standby state and the analog voltage signal is not generated, the first-stage judging controller is in a low-power-consumption mode working state, and the second-stage judging controller is in a non-working state. According to the low-power consumption monitoring and detecting method provided by the invention, the physical collision of the vehicle during parking is detected through a plurality of piezoelectric sensors arranged at different parts of the vehicle, and an analog voltage signal is generated, and the method comprises the following steps: Forming a plurality of detection channels through analog front ends and operational circuits which are in one-to-one correspondence with a plurality of piezoelectric sensors; The physical collision of different parts of the vehicle is respectively converted into analog voltage signals through the detection channels; and judging the threshold value of the analog voltage signal, and determining whether the physical collision is a valid vehicle collision event. According to the low-power consumption monitoring and detecting method provided by the invention, the detection processing is carried out on the analog voltage signal, and whether an effective vehicle collision event occurs is judged by combining a signal threshold value, and the method comprises the following steps: determining the collision part of the physical collision of the vehicle through the number of the detection channel; Inquiring a pressure threshold corresponding to a collision part of a vehicle in the association relation between the collision part and the pressure threshold; and when the analog voltage signal is larger than the pressure threshold value corresponding to the collision part, determining that the collision part has an effective vehicle collision event. According to the low-power consumption monitoring and detecting method provided by the invention, after the collision part is determined to have an effective vehicle collision event, the method further comprises the following steps: When the analog voltage signal is smaller than a preset threshold value, judging a general collision event, and starting a camera associated with the triggered piezoelectric sensor; And when the analog voltage signal is larger than or equal to the preset threshold value, judging that the analog voltage signal is a strong impact event, and starting all cameras. According to the low power consumption monitoring and detecting method provided by the invention, the second-stage judgment based on the vehicle looking-around image data is executed, and the method comprises the following steps: a plurality of camera modules are arranged corresponding to the piezoelectric sensors, and monitoring pictures corresponding to the vehicle par