Communication Anomaly Detecting Device, and Passenger Detecting Device
First Claim
1. A communication anomaly detector of a communication system, comprising:
- an information request portion having a receiving port, at least one information response portion connected to the information request portion in such a manner that bidirectional digital communications are possible through a signal line, and a power supply system, wherein, when the information request portion transmits an information request signal, the information response portion receives the information request signal and transmits an information response signal to the receiving port of the information request portion, wherein the information request portion, when transmitting the information request signal to the information response portion, receives the information request signal at the receiving port, and wherein the information request portion comprises at least one of a power supply system anomaly determination portion and a ground anomaly determination portion, the power supply system anomaly determination portion determining a short-circuit between the signal line and the power supply system in a case where the information request signal received at the receiving port is always fixed to a high level, and the ground anomaly determination portion determining a short-circuit between the signal line and a ground in a case where the information request signal received at the receiving port is always fixed to a low level.
1 Assignment
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Accused Products
Abstract
An information request portion receives an information request signal transmitted to an information response portion at its own receiving port. The information request portion comprises at least either of a power supply system anomaly determination portion or a ground anomaly determination portion. The power supply system anomaly determination portion determines a short-circuit between a signal line and a power supply system in a case where the information request signal received at the receiving port is always fixed to a H (high) level. The ground anomaly determination portion determines a short-circuit between a signal line and a ground in a case where the information request signal received at the receiving port is always fixed to a L (Low) level. Consequently, the anomaly region of the signal line connecting the information request portion and the information response portion in such a manner that bidirectional digital communications are possible or the cause of the anomaly is specified.
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Citations
8 Claims
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1. A communication anomaly detector of a communication system, comprising:
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an information request portion having a receiving port, at least one information response portion connected to the information request portion in such a manner that bidirectional digital communications are possible through a signal line, and a power supply system, wherein, when the information request portion transmits an information request signal, the information response portion receives the information request signal and transmits an information response signal to the receiving port of the information request portion, wherein the information request portion, when transmitting the information request signal to the information response portion, receives the information request signal at the receiving port, and wherein the information request portion comprises at least one of a power supply system anomaly determination portion and a ground anomaly determination portion, the power supply system anomaly determination portion determining a short-circuit between the signal line and the power supply system in a case where the information request signal received at the receiving port is always fixed to a high level, and the ground anomaly determination portion determining a short-circuit between the signal line and a ground in a case where the information request signal received at the receiving port is always fixed to a low level. - View Dependent Claims (2, 3, 4, 5)
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6. An occupant detector, comprising:
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a plurality of load sensors for acquiring load information corresponding to a load applied to a seat and a control device connected to the plurality of load sensors in such a manner that bidirectional digital communications are possible through signal lines respectively, wherein, when the control device transmits information request signals to the plurality of load sensors, the plurality of load sensors receive the information request signals, and the plurality of load sensors transmit load information signals including the load information in response to the received information request signals, and the control device, upon reception of these load information signals, performs an occupant determination, wherein the control device comprises;
a single port for transmitting the information request signals to the plurality of load sensors and a plurality of receiving ports for receiving the load information signals from the plurality of load sensors, respectively, the number of the receiving ports being the same as the number of the load sensors.
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7. An occupant detector, comprising:
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at least one load sensor for acquiring load information according to a load applied to a seat and a control device connected to the load sensor in such a manner that bidirectional digital communications are possible through a signal system line, wherein, when the control device transmits the information request signal to the load sensor, the load sensor receives the information request signal, and the load sensor transmits a load information signal including the load information in response to the received information request signal, and the control device receives this load information signal and performs an occupant determination, the occupant detector comprising;
the control device and first and second power supply system lines for supplying electricity to the load sensor through the control device, and the potential of the first power supply system line is higher than the potential of the second power supply system line, wherein the control device comprises a switching element and a pull-up resistor, and wherein the switching element comprises a first terminal connected to the signal system line, a second terminal connected to the second power supply system line, and a control terminal for inputting the information request signal, and wherein the pull-up resistor has one end connected to the first power supply system line and another end connected to the signal system line, and wherein the load sensor comprises a switching element comprising a first terminal connected to the signal system line, a second terminal connected to the second power supply system line, and a sensor side control terminal for inputting the load information signal. - View Dependent Claims (8)
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Specification