Seat weight detecting subsystem

摘要

It is provided a subsystem for seat weight detection, the configuration of which enables improved assemblability and economization of space in layout. A seat weight detecting subsystem is provided for each seat 7 mounted inside a vehicle. Each seat weight detecting subsystem 4 includes weight detection sensors 8 which are installed in a seat 7, and a power supplying member 9 which is connected to the weight detecting sensors 8, a power supply 5, an ECU 3 and the like. The power supplying member 9 is provided with an FPC 10 and a seat side ECU functional portion 11 that is integratedly attached to the FPC 10. The seat-side ECU functional portion 11 includes sensor connecting sections 13, a signal receiving section 14, a data generating section 15, and a data outputting section 16.

主权项

1. A seat weight detecting subsystem provided for each seat in a vehicle and for outputting weight detection data which is necessary for a processing operation of an ECU in a main system, the seat weight detecting subsystem comprising:
a plurality of weight detecting sensors; and a power supplying member that is connected to a power supply, wherein the power supplying member includes:
a FPC which has circuits forming desired routes, and is formed so as to have a size which corresponds to at least arrangements of all of the plurality of weight detecting sensors on the seat in the vehicle; anda seat side ECU functional portion having:
sensor connecting sections which serve as connecting portions of the plurality of weight detecting sensors at the corresponding arrangements;a signal receiving section which receives sensor signals from the weight detecting sensors through the sensor connecting sections;a data generating section which generates the weight detection data based on the received sensor signals; anda data outputting section as a portion which outputs the generated weight detection data to the ECU; and wherein the seat side ECU functional portion is mounted to a specified position on the circuits of the FPC, and the plurality of weight detecting sensors are arranged in a bus-like arrangement, wherein the seat side ECU functional portion includes:
a plurality of first ECU functional portions provided as many as the number of the plurality of weight detecting sensors; anda second ECU functional portion connected to the plurality of first ECU functional portions through a common circuit in the FPC; wherein the signal receiving section includes:
a second signal receiving section provided in the second ECU functional portion; andfirst signal receiving sections which are respectively provided in the plurality of first ECU functional portions and output the received sensor signals to the second signal receiving section through the common circuit while associating the received sensor signals to the weight detecting sensors at the corresponding arrangements; wherein the first ECU functional portion includes the sensor connecting sections and the first signal receiving section; wherein the second ECU functional portion includes the second signal receiving section, the data generating section and the data outputting section; wherein the FPC includes the common circuit; wherein the second ECU functional portion is connected to one of the plurality of first ECU functional portions through first electric lines, and the one of the plurality of first ECU functional portions is connected to the other of the plurality of first ECU functional portions (24a) through second electric lines; and wherein the first electric lines and the second electric lines are the same signal traces.