DETECTION SYSTEM FOR VEHICLE

• US 20190308586A1
• Filed: 04/03/2019
• Published: 10/10/2019
• Est. Priority Date: 04/09/2018
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Kominato, Yasuhiro, Nakamura, Goro, Kunitachi, Tadahide, Matsushita, Kenji
• Granted Patent: US 10,933,841 B2
• Time in Patent Office: Days
• CPC Class Codes: B60N 2/002 Seats provided with an occupancy detection means mounted therein or thereon detection means responsive to presence or absence of children B60N2/266
• CPC Class Codes: B60Q 9/00 Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00 , e.g. haptic signalling
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: B60R 2021/01088 wireless
• CPC Class Codes: B60R 2022/4808 Sensing means arrangements therefor
• CPC Class Codes: B60R 2022/4816 for sensing locking of buckle
• CPC Class Codes: B60R 2022/4866 Displaying or indicating arrangements thereof
• CPC Class Codes: B60R 21/01512 Passenger detection systems
• CPC Class Codes: B60R 21/01546 using belt buckle sensors
• CPC Class Codes: B60R 22/48 Control systems, alarms, or interlock systems, for the correct application of the belt or harness

Abstract

A detection system for vehicle includes a reader and a first detector. The reader is provided in a vehicle, transmits and receives radio signals, and transmits transmission signals including at least radio signals for supplying electric power. The first detector is driven by the radio signals for supplying electric power included in the transmission signals when receiving the transmission signals and can transmit first response signals output in response to the transmission signals to the reader. The first detector is disposed in a sitting area on a seat where the first response signals transmitted to the reader are blocked. The reader determines a sitting state of a passenger based on whether the first response signals are received in response to the transmission signals.

Claims

1. A detection system for vehicle comprising:

a reader provided in a vehicle and configured to transmit and receive a radio signal and to transmit a transmission signal including at least a radio signal for supplying electric power; and

a first detector driven by the radio signal for supplying electric power included in the transmission signal when receiving the transmission signal and capable of transmitting a first response signal output in response to the transmission signal to the reader, wherein

the first detector is disposed in a sitting area on a seat where the first response signal transmitted to the reader is blocked, and

the reader determines a sitting state of a passenger based on whether the first response signal is received in response to the transmission signal.

2. The detection system for vehicle according to claim 1, wherein

the seat includes at least a seat surface and a backrest,

at least one first detector is disposed in each of the sitting areas of the seat surface and the backrest,

a plurality of the first detectors each has unique first identification information and transmits the first identification information to the reader as the first response signal, and

the reader determines, when receiving the first identification information from the first detector disposed in the seat surface, an attribute of the passenger based on whether the first identification information is received from the first detector disposed in a height direction of the backrest.

3. The detection system for vehicle according to claim 2, wherein

the reader identifies arrangement positions of the first detectors based on the first identification information received from the respective first detectors and determines the sitting state of the passenger based on number of the arrangement positions.

4. The detection system for vehicle according to claim 1, further comprising:

a second detector driven by the radio signal for supplying electric power included in the transmission signal and detects a seat belt wearing state of the seat, wherein

the second detector includes a switching circuit configured to switch to an ON state or an OFF state based on the seat belt wearing state of the seat,

the second detector transmits a second response signal to the reader depending on the ON state or the OFF state of the switching circuit,

the reader determines the sitting state of the passenger on the seat based on the first response signal, determines the seat belt wearing state based on the second response signal, and outputs, when the passenger is in the sitting state and does not wear the seat belt, a warning signal to a notifying unit, and

the notifying unit warns the passenger based on the warning signal.

5. The detection system for vehicle according to claim 2, further comprising:

a second detector driven by the radio signal for supplying electric power included in the transmission signal and detects a seat belt wearing state of the seat, wherein

the second detector includes a switching circuit configured to switch to an ON state or an OFF state based on the seat belt wearing state of the seat,

the second detector transmits a second response signal to the reader depending on the ON state or the OFF state of the switching circuit,

the reader determines the sitting state of the passenger on the seat based on the first response signal, determines the seat belt wearing state based on the second response signal, and outputs, when the passenger is in the sitting state and does not wear the seat belt, a warning signal to a notifying unit, and

the notifying unit warns the passenger based on the warning signal.

6. The detection system for vehicle according to claim 3, further comprising:

a second detector driven by the radio signal for supplying electric power included in the transmission signal and detects a seat belt wearing state of the seat, wherein

the second detector includes a switching circuit configured to switch to an ON state or an OFF state based on the seat belt wearing state of the seat,

the second detector transmits a second response signal to the reader depending on the ON state or the OFF state of the switching circuit,

the reader determines the sitting state of the passenger on the seat based on the first response signal, determines the seat belt wearing state based on the second response signal, and outputs, when the passenger is in the sitting state and does not wear the seat belt, a warning signal to a notifying unit, and

the notifying unit warns the passenger based on the warning signal.