A parking detection system integrating heterogeneous sensors
Patent Information
- Application Number
- TW115206564
- Authority / Receiving Office
- TW · TW
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-07-13
- Publication Date
- 2026-10-01
- Estimated Expiration
- 2036-07-12
Smart Images
Figure 00000000_0000_ABST
Abstract
Claims
1. A parking detection system integrating heterogeneous sensors to detect whether the parking status of a parking space has changed, comprising: A first sensing unit, which is always-on, senses the ambient magnetic field of the parking space. A second sensing unit, upon receiving a wake-up signal, emits microwave energy to the parking space and receives microwave reflected energy from a target object in the parking space; a third sensing unit, upon receiving the wake-up signal, detects a vertical absolute distance between itself and the target object. The system also includes a control module connected to the first sensing unit, the second sensing unit, and the third sensing unit to receive the ambient magnetic field, the microwave reflected energy, and the vertical absolute distance. When the vector change of the ambient magnetic field relative to a reference magnetic field exceeds a dynamic trigger threshold, the control module generates a wake-up signal and transmits it to the second and third sensing units respectively. The control module compares one of the sensing values of the microwave reflected energy and the vertical absolute distance within a preset time domain with an environmental reference value to obtain an energy difference and a distance difference respectively. Based on the energy difference and the distance difference, the system determines whether the parking status of the parking space has changed.
2. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein the first sensing unit, the second sensing unit, and the third sensing unit are disposed together in a closed housing.
3. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein the first sensing unit is separately disposed from the control module, and the first sensing unit remotely transmits the ambient magnetic field to the control module via a wireless communication link.
4. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein the third sensing unit is selected from the group consisting of optical time-of-flight (ToF) sensors, infrared (IR) sensors, ultrasonic sensors, and laser sensors.
5. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein the second sensing unit is selected from the group consisting of millimeter-wave radar modules, submillimeter-wave radar modules, or ultra-wideband (UWB) radar sensing modules.
6. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein the control module determines that the parking state of the parking space has changed when both the energy difference and the distance difference reach a threshold value.
7. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein the control module determines that the parking state of the parking space has changed when either the energy difference or the distance difference reaches a threshold value.
8. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein after the control module determines the change in the parking state of the parking space, it uses the sensed value of the microwave reflected energy and the vertical absolute distance as the environmental reference value.
9. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein the control module uses the ambient magnetic field as the reference magnetic field when neither the energy difference nor the distance difference reaches a threshold value.
10. The parking detection system integrating heterogeneous sensors as described in claim 1, wherein when the control module determines that both the second sensing unit and the third sensing unit have failed, the control module determines whether the parking state of the parking space has changed based on whether the vector change of the ambient magnetic field exceeds the dynamic trigger threshold.
11. The parking detection system integrating heterogeneous sensors as described in claim 10, wherein when the vertical absolute distance has no random noise fluctuations within a specified time and the change is less than a self-test threshold, the control module determines that the third sensing unit has failed.
12. The parking detection system integrating heterogeneous sensors as described in claim 10, wherein when the energy distribution of the high-frequency harmonic components of the microwave reflected energy deviates from a preset normal envelope threshold within a specified time, or when a step change occurs in the static DC bias voltage, the control module determines that the second sensing unit has failed.
13. The parking detection system integrating heterogeneous sensors as described in claim 1, further comprising an asynchronous delay cache memory, wherein the control module is connected to the asynchronous delay cache memory and a cloud server, wherein when the control module uploads a data packet to the cloud server, if the data packet is rejected by the cloud server, it is temporarily stored in the asynchronous delay cache memory and re-uploaded after a random period of time.