摘要:
A non-inverting dual voltage regulation set point power supply for a restraint control module is disclosed that includes a main power source. A regulated voltage generation circuit connected with said main power source for generating a regulated output voltage having an upper set point and a lower set point. A buck switch connected to said main power source and said regulated voltage generation circuit for bucking the regulated output voltage generated by said regulated voltage generation circuit to said upper set point if said voltage supplied from said main power source is greater than said upper set point. A boost switch connected with said regulated voltage generation circuit for boosting the regulated output voltage generated by said regulated voltage generation circuit to said lower set point if said voltage supplied from said main power source is less than said lower set point.
摘要:
A method and system for measuring the capacitance of a backup power source in a backup power supply system is disclosed by the present invention. The regulated output voltage is set to a nominal regulated output voltage during normal operation and then adjusted to a predetermined regulated output voltage during a capacitance measurement. A pair of predetermined loads is connected to the backup power source in consecutive order for discharging energy from the backup power source. A counter is used to count the time that elapses before the regulated output voltage reaches the lower regulated output voltage or the backup power supply system begins regulating. The resulting counts are used by a main control unit, together with several other known values, to determine the capacitance of the backup power source.
摘要:
A backup power supply for a restraint control module is disclosed that includes a main power source that is connected to a backup power source charging circuit. A boost converter control and driver circuit is connected with the main power source and the backup power source such that the boost converter control and driver circuit controls the charging of the backup power source with the main power source during normal operation. A backup power supply control and driver circuit is connected with a backup power supply switching device. The backup power supply control and driver circuit switches the source of power from the main power source to the backup power source when the backup power supply control circuit senses a loss of power from the main power source.
摘要:
A circuit 17 for interfacing with a sensor 18 having a sensor input current and a modulated sensor current signal corresponding to a sensed condition. A control module 20 is coupled to the sensor 18 and receives the sensor current signal. The control module 20 converts the sensor current signal to a modulated signal having a pulse width with a duration corresponding to the sensed condition. The control module 20 counts a time corresponding to the pulse width. The time corresponds to the sensed condition.
摘要:
An electrical ground detection circuit 10 having a first capacitor 18 and a second capacitor 20 which selectively receives a certain amount of voltage. The certain amount of voltage decreases by a certain amount during a period of time, as the capacitor 18 charges. The circuit 10 further includes a controller 16 which measures this period of time and which utilizes this measured period of time to determine whether an electrical assembly 12 is coupled to an electrically grounded member 14.
摘要:
An impact detection system has two chambers disposed adjacent to one another. The two chambers have opposing tapered shapes, so that an impact anywhere along them will create a different pressure wave or pulse in each chamber. A pressure sensor module incorporating two pressure sensors is disposed at one end of the dual-channel unit, and comparison of the signals from the sensors can be used to discriminate both the location and severity of a pedestrian impact.
摘要:
A vehicle has an inflatable occupant restraint system that includes an inflatable occupant protection device and an inflator operable to inflate the inflatable occupant protection device when a predetermined event occurs. The vehicle also includes a child restraint system having a portable child seat with an inflatable child protection apparatus attached thereto. The child restraint system includes a connection interface connected to the child seat and adapted for connection to the occupant restraint system such that the child protection apparatus is inflated when the predetermined event occurs.
摘要:
An impact detection system has two chambers disposed adjacent to one another. The two chambers have opposing tapered shapes, so that an impact anywhere along them will create a different pressure wave or pulse in each chamber. A pressure sensor module incorporating two pressure sensors is disposed at one end of the dual-channel unit, and comparison of the signals from the sensors can be used to discriminate both the location and severity of a pedestrian impact.
摘要:
A vehicle has an inflatable occupant restraint system that includes an inflatable occupant protection device and an inflator operable to inflate the inflatable occupant protection device when a predetermined event occurs. The vehicle also includes a child restraint system having a portable child seat with an inflatable child protection apparatus attached thereto. The child restraint system includes a connection interface connected to the child seat and adapted for connection to the occupant restraint system such that the child protection apparatus is inflated when the predetermined event occurs.
摘要:
A sensor mount assembly including a housing, fastener and a lever mechanism. The housing contains a sensor having two electrical leads and includes an integral flange adapted to receive a fastener. The fastener includes a body and a head. The body is received in the flange to secure the housing to a mount. The lever mechanism is proximate the flange and includes a contact block and a conductor. The contact block is acted upon by the fastener head to move the lever mechanism and, hence the conductor, between a first position and a second position. The first position corresponds to an unmounted sensor and creates a short circuit condition between the two electrical leads. The second position corresponds to a properly mounted sensor and creates an open circuit between the two electrical leads such that the electrical circuit path of the overall system includes the sensor within the housing.