# US 9,519,834 B2 · Night parking detection

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,519,834 B2
- Document ID: US9519834B2
- Status: Granted
- Kind: B2
- Application number: 14/919,883
- Filed: 2015-10-22
- Published: 2016-09-08
- Granted: 2016-12-13
- Earliest claimed: 2015-03-03
- Assignees: HangZhou HaiCun Information Technology Co., Ltd.; Guobiao Zhang
- Applicants: HangZhou HaiCun Information Technology Co., Ltd.
- Inventors: Guobiao Zhang
- Web page: https://patentgrep.com/patent/US9519834B2

## CPC

- G06V 20/586: {of parking space}
- G06V 20/54: of traffic, e.g. cars on the road, trains or boats
- G06V 20/584: {of vehicle lights or traffic lights}
- G08G 1/14: indicating individual free spaces in parking areas
- H04N 23/50: Constructional details
- G08B 1/00: Systems for signalling characterised solely by the form of transmission of the signal
- H04W 4/00: Services specially adapted for wireless communication networks; Facilities therefor
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G08G: TRAFFIC CONTROL SYSTEMS (guiding railway traffic, ensuring the safety of railway traffic B61L; arrangement of road signs or traffic signals E01F9/00; radar or analogous systems, sonar systems, lidar systems specially adapted for traffic control G01S13/91, G01S15/88, G01S17/88; {radar or analogous systems, sonar systems, lidar systems specially adapted for anti-collision purposes G01S13/93, G01S15/93, G01S17/93})
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The present invention discloses a night parking-monitoring device. It monitors the state change of a parking space at night by tracking at least a light of a vehicle.

## Claims

### Claim 1

A parking-monitoring device for monitoring at least a parking space under a low ambient lighting, comprising:
a camera located on a fixed structure, wherein said camera captures a sequence of images of at least a light of a vehicle, but cannot acquire the details of said parking space under said low ambient lighting;
a processor coupled to said camera, wherein said processor determines the change of the parking state of said parking space only from a track of said light obtained from said sequence of images, without using the output of any vehicle indicator.

### Claim 2 (depends on 1)

The device according to claim 1, wherein said light is a headlight of said vehicle.

### Claim 3 (depends on 1)

The device according to claim 1, wherein said light is a taillight of said vehicle.

### Claim 4 (depends on 1)

The device according to claim 1, wherein said camera captures images at a faster rate at night than during the day.

### Claim 5 (depends on 1)

The device according to claim 1, wherein said parking state is changed when the direction of said track changes.

### Claim 6 (depends on 1)

The device according to claim 1, wherein said parking state is changed when the displacement of said track exceeds a pre-determined value.

### Claim 7 (depends on 1)

The device according to claim 1, further comprising a vehicle-movement sensor.

### Claim 8 (depends on 7)

The device according to claim 7, wherein said camera captures said sequence of images when said vehicle-movement sensor detects a nearby moving vehicle.

### Claim 9 (depends on 7)

The device according to claim 7, wherein said camera does not capture any images when said vehicle-movement sensor does not detect a nearby moving vehicle.

### Claim 10 (depends on 7)

The device according to claim 7, wherein said vehicle-movement sensor comprises an audio sensor.

### Claim 11 (depends on 7)

The device according to claim 7, wherein said vehicle-movement sensor comprises an optical sensor.

### Claim 12 (depends on 7)

The device according to claim 7, wherein said vehicle-movement sensor comprises an electromagnetic sensor.

### Claim 13 (depends on 1)

The device according to claim 1, further comprising a passing-by vehicle detector, wherein the state of the said parking spaces is determined from at least an image of said parking space illuminated by at least a light beam output from a passing-by vehicle.