System and method for detecting whether seat belt is worn
First Claim
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1. A system for detecting whether a seat belt is worn, comprising:
- a contact type sensor and a non-contact type sensor installed in a seat belt buckle, wherein the contact type sensor is supplied with power from a vehicle battery even when an ignition key is on;
a Body Control Module (BCM) for receiving a signal from the contact type sensor and transmitting the signal to a cluster;
an airbag control unit for receiving a signal from the non-contact type sensor; and
a seat belt control unit for receiving the signals from the cluster and the airbag control unit, and determining whether the seat belt is worn using the signal received from the cluster when an ignition key is off, and determining whether the seat belt is worn, using the signal received from the airbag control unit when the ignition key is on;
wherein the seat belt control unit is configured to perform at least a slack removal function if it is determined that the seat belt is worn when the ignition key is on, and perform at least a parking function if it is determined that the seat belt is not worn when the ignition key is off, andwherein the seat belt control unit, after the ignition key is off, considers the signal received from the contact type sensor to be an error and ignores the signal of the contact type sensor, when final signals detected by the contact type sensor and the non-contact type sensor, respectively, before the ignition key is off, are different from each other.
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Abstract
A system and method of detecting whether a seat belt is worn is disclosed. The system includes a contact type sensor and a non-contact type sensor installed in a seat belt buckle. A Body Control Module (BCM) receives a signal from the contact type sensor and transmitting the signal to a cluster. An airbag control unit receives a signal from the non-contact type sensor. The seat belt control unit determines whether a seat belt is worn using a signal received from the cluster when an ignition key is off, and determines whether the seat belt is worn using a signal received from the airbag control unit when the ignition key is on.
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2 Claims
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1. A system for detecting whether a seat belt is worn, comprising:
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a contact type sensor and a non-contact type sensor installed in a seat belt buckle, wherein the contact type sensor is supplied with power from a vehicle battery even when an ignition key is on; a Body Control Module (BCM) for receiving a signal from the contact type sensor and transmitting the signal to a cluster; an airbag control unit for receiving a signal from the non-contact type sensor; and a seat belt control unit for receiving the signals from the cluster and the airbag control unit, and determining whether the seat belt is worn using the signal received from the cluster when an ignition key is off, and determining whether the seat belt is worn, using the signal received from the airbag control unit when the ignition key is on; wherein the seat belt control unit is configured to perform at least a slack removal function if it is determined that the seat belt is worn when the ignition key is on, and perform at least a parking function if it is determined that the seat belt is not worn when the ignition key is off, and wherein the seat belt control unit, after the ignition key is off, considers the signal received from the contact type sensor to be an error and ignores the signal of the contact type sensor, when final signals detected by the contact type sensor and the non-contact type sensor, respectively, before the ignition key is off, are different from each other.
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2. A method of detecting whether a seat belt is worn, comprising:
- receiving signals from a contact type sensor and a non-contact type sensor;
determining whether an ignition key is on or off; determining whether the seat belt is worn on a basis of the signal that is detected by the non-contact type sensor installed in a seat belt buckle and is received through an airbag control unit, after the ignition key is on, wherein the contact type sensor is supplied with power from a vehicle battery even when the ignition key is off and the non-contact type sensor is supplied with power when the ignition key is on; and determining whether the seat belt is worn on a basis of the signal that is detected by the contact type sensor installed in the seat belt buckle and is received through a cluster, after the ignition key is off, wherein after the ignition key is off, the signal received from the contact type sensor is determined to be an error and is ignored when final signals detected by the contact type sensor and the non-contact type sensor, respectively, before the ignition key is off, are different from each other.
- receiving signals from a contact type sensor and a non-contact type sensor;
Specification