摘要:
A device (20) for an automotive vehicle (10) is provided to indicate the buckled and unbuckled status of a seatbelt (24). The device (20) has a self-powered wireless switch assembly (22) that is coupled to the seatbelt (24). It provides power to power a wireless transmitter (44) to transmit a wireless signal (45) corresponding to the buckled and unbuckled state of the seatbelt (24). The self-powered wireless switch assembly (22) harvests energy from the mechanical action of the seatbelt (24). The device (20) transmits a wireless signal (45) indicating the seatbelt (24) status. The receiver (18) located in the automotive vehicle (10) receives the wireless signal (45). The wireless signal (45) is processed by a safety information system (12) and then visually and audibly displayed by an indicator (16) to alert the driver of the seatbelt (24) status.
摘要:
A tire pressure monitoring system (12) for a vehicle (10) includes a vehicle speed sensor (38, 98) that is used to generate a vehicle speed signal. A receiver (28) operates using a first protocol when the vehicle speed signal is below a first speed threshold and operates using a second protocol when the vehicle speed is above the speed threshold. A remote keyless entry system (23) is coupled to the receiver and operates when the vehicle speed is below a speed threshold. The remote keyless entry system (23) receives signals from a keyless entry transmitter (60) using the first protocol. A tire pressure monitoring system (12) has a pressure transmitter (16A-16E) that generates a signal using a first protocol and a second protocol when the speed signal is below the speed threshold and generating the signal using only the second protocol when the speed signal is above the speed threshold.
摘要:
A tire pressure monitoring system (12) for an automotive vehicle (10) has a receiver circuit (28). The vehicle (12) has a plurality of wheels (14A-14D). A plurality of antennas (31A-31D) are adjacent to one of the wheels (14A-14D). The plurality of antennas receive RF signals from a pressure sensor (16A). An adder circuit (30) is coupled to the receiver circuit and the plurality of antennas. The adder circuit receives the RF signals and adds them together to form a sum signal. The sum signal is coupled to the receiver circuit.
摘要:
A tire pressure monitoring system (12) for an automotive vehicle (10) has a receiver circuit (28). The vehicle (12) has a plurality of wheels (14A-14D). A plurality of antennas (31A-31D) are adjacent to one of the wheels (14A-14D). The plurality of antennas receive RF signals from a pressure sensor (16A). An adder circuit (30) is coupled to the receiver circuit and the plurality of antennas. The adder circuit receives the RF signals and adds them together to form a sum signal. The sum signal is coupled to the receiver circuit.
摘要:
A tire pressure monitoring system (12) for a vehicle (10) includes a vehicle speed sensor (38, 98) that is used to generate a vehicle speed signal. A receiver (28) operates using a first protocol when the vehicle speed signal is below a first speed threshold and operates using a second protocol when the vehicle speed is above the speed threshold. A remote keyless entry system (23) is coupled to the receiver and operates when the vehicle speed is below a speed threshold. The remote keyless entry system (23) receives signals from a keyless entry transmitter (60) using the first protocol. A tire pressure monitoring system (12) has a pressure transmitter (16A-16E) that generates a signal using a first protocol and a second protocol when the speed signal is below the speed threshold and generating the signal using only the second protocol when the speed signal is above the speed threshold.
摘要:
A tire pressure monitoring system for a vehicle has been disclosed that can detect an excessive leakage rate of a tire. The system utilizes the starting pressure and starting temperature of a tire and the current pressure and current temperature of that tire with the time lapsed to determine the leakage rate of the tire. This leakage rate is compared to a leakage rate threshold. If the leakage rate is greater than the leakage rate threshold, an excessive leakage rate alert is generated.
摘要:
A tire pressure monitoring system (12) for a vehicle (10) has a pressure sensor circuit (16A) that includes an ECU (95), a transmitter/receiver (90), and pressure sensor (94). A method of operating a tire pressure monitoring system includes calibrating a tire pressure sensor circuit in a first range and a second range and generating a first calibration data for the first range and second calibration data for the second range. The first calibration data and the second calibration data are stored in a memory of the tire pressure sensing circuit (16A). A data signal corresponding to the pressure is generated. The first or second calibration data is generated in response to the range of the data signal to form a selected calibration. The data signal is calibrated with the selected calibration to form a pressure indicative signal. The pressure indicative signal is transmitted to a receiver (28) within the vehicle (10) with a range status corresponding to the selected calibration. A pressure signal is formed in response to the pressure indicative signal and the range status and the tire pressure monitoring system is operated with the pressure signal.
摘要:
A tire pressure monitoring system for a vehicle has bleed and refill pressure thresholds in addition to high and low pressure thresholds. If a tire pressure remains at a level below the refill pressure threshold and above the low pressure threshold for a specific period of time, based on amount of deviation from the refill pressure threshold, a refill alert is generated. If a tire pressure remains at a level above the bleed pressure threshold and below the high pressure threshold for a specific period of time, based on amount of deviation from the bleed pressure threshold, a bleed alert is generated.
摘要:
A tire pressure monitoring system for detachment detection of a tire pressure sensor is provided. The system includes a tire pressure sensor, a receiver and a controller. The tire pressure sensor includes a transmitter for transmitting a word having a detachment state. The receiver is for receiving the word and is coupled to the controller. The controller decodes the word and determines the detachment state of the tire pressure sensor. A robust method for the automatic detection of a detached tire pressure sensor of a tire pressure monitoring system is also provided.
摘要:
A tire pressure monitoring system (12) for a vehicle (10) has a pressure sensor circuit (16A) that includes an ECU (95), a transmitter/receiver (90), and pressure sensor (94). A method of operating a tire pressure monitoring system includes calibrating a tire pressure sensor circuit in a first range and a second range and generating a first calibration data for the first range and second calibration data for the second range. The first calibration data and the second calibration data are stored in a memory of the tire pressure sensing circuit (16A). A data signal corresponding to the pressure is generated. The first or second calibration data is generated in response to the range of the data signal to form a selected calibration. The data signal is calibrated with the selected calibration to form a pressure indicative signal. The pressure indicative signal is transmitted to a receiver (28) within the vehicle (10) with a range status corresponding to the selected calibration. A pressure signal is formed in response to the pressure indicative signal and the range status and the tire pressure monitoring system is operated with the pressure signal.