Method for the transmission of a sensor data signal and an additional data signal from a sensor component to at least one receiver
First Claim
1. Method for the transmission of a sensor a data signal (s11) and an additional data signal (s14) from a sensor assembly (1) to at least one receiver (2) of the sensor data signal and one receiver (3,5) of the additional data signal through a common transmission channel (4),a) whereby a sensor (11) measures a quantity that is to be measured and generates a corresponding sensor data signal, b) the receiver (2) of the sensor data signal (s11) controls an application unit dependent on the sensor data signal, wherein the receiver (2) of the sensor data signal compares the sensor data signal with a threshold value (x2), and activates the application unit only if the sensor data signal (s11) exceeds the threshold value (x2), c) whereby a total value range of the sensor data signal (x0-xn) includes a value range (x0-x1) that is uncritical for the control of the application unit, d)in response to a control signal (s3/s5/s15/sl6/Uon), a data transmission unit (13) of the sensor assembly (1) at least temporarily for a short time transmits an additional data signal (s14) instead of the sensor data signal (s11), whereby the value range that is below the threshold value and that is uncritical for the control of the application unit is used as the signal value range for the additional data signal (s14).
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Accused Products
Abstract
A method for the transmission of sensor data from a sensor assembly to one or more receivers is presented, in which, in response to a control signal, additional data are transmitted at least temporarily for a short time instead of the sensor data, whereby only a certain limited value range of the value range that is available for the sensor data transmission is used for the transmission of the additional data, so that even with receivers which do not recognize that the transmitted data are additional data, erroneous functions or malfunctions are to be excluded. Thus, especially that value range of the sensor data signal that is to be attributed to a noise of the quantity to be measured or of the sensor assembly and is therefore not evaluated by the receiver in the normal signal operation, is used for the transmission of the additional data. In occupant protection systems, the safety-uncritical value range of a sensor data signal, which leads to no triggering of the occupant protection system, can correspondingly be used for the transmission of the additional data.
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Citations
20 Claims
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1. Method for the transmission of a sensor a data signal (s11) and an additional data signal (s14) from a sensor assembly (1) to at least one receiver (2) of the sensor data signal and one receiver (3,5) of the additional data signal through a common transmission channel (4),
a) whereby a sensor (11) measures a quantity that is to be measured and generates a corresponding sensor data signal, b) the receiver (2) of the sensor data signal (s11) controls an application unit dependent on the sensor data signal, wherein the receiver (2) of the sensor data signal compares the sensor data signal with a threshold value (x2), and activates the application unit only if the sensor data signal (s11) exceeds the threshold value (x2), c) whereby a total value range of the sensor data signal (x0-xn) includes a value range (x0-x1) that is uncritical for the control of the application unit, d)in response to a control signal (s3/s5/s15/sl6/Uon), a data transmission unit (13) of the sensor assembly (1) at least temporarily for a short time transmits an additional data signal (s14) instead of the sensor data signal (s11), whereby the value range that is below the threshold value and that is uncritical for the control of the application unit is used as the signal value range for the additional data signal (s14).
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10. Acceleration sensor assembly for generating an acceleration signal in an occupant protection system,
a) whereby a signal value range (+127 to − - 128) is prescribed for a data transmission, this signal value range is divided into a sensor data value range (+120 to −
120) for a sensor data transmission of a sensor data signal comprising an acceleration signal (S11) from an acceleration sensor and a control signal value range (+127 to +121 as well as −
121 to −
128), that is distinguishable therefrom, for transmission of control signals for controlling of the data transmission,b) at least one activation unit of at least one occupant protection device is provided, which receives the acceleration signal (s11) and decides about the triggering of the occupant protection device(s) dependent on the acceleration signal (s11), whereby c) the sensor data value range (+120 to −
120) of the acceleration signal (s11) comprises a safety-uncritical value range (+3 to −
3) and the activation unit initiates no activation of the occupant protection device with values of the acceleration signal in this safety-uncritical value range (+3 to −
3), andd) in response to a prescribed control signal, the acceleration sensor transmits additional data (s14) while using exclusively the safety-uncritical value range (+3 to −
3). - View Dependent Claims (11, 12)
- 128) is prescribed for a data transmission, this signal value range is divided into a sensor data value range (+120 to −
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13. A signal transmission method comprising the steps:
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a) with a sensor of a sensor assembly, measuring a quantity to be measured and generating a sensor data signal containing sensor data indicative of said quantity in a first value range and in a second value range;
b) transmitting said sensor data signal via a transmission channel;
c) receiving said sensor data signal via said transmission channel in a first receiver;
d) with said first receiver, comparing said sensor data to a threshold, controlling an application unit in response to and dependent on said sensor data in said first value range only if said sensor data exceed said threshold, and not controlling said application unit in response to said sensor data in said second value range which is a range of said sensor data that is at or below said threshold and is uncritical for controlling said application unit;
e) temporarily interrupting said transmitting of said sensor data signal and instead thereof transmitting, from said sensor assembly via said transmission channel, an additional data signal containing additional data in said second value range. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A motor vehicle occupant protection system, comprising:
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an acceleration sensor arrangement adapted to measure an acceleration and corresponding thereto produce acceleration data respectively an first and second value ranges;
an additional data unit adapted to provide additional data in said second value range;
a transmitter that is connected at least selectively to said acceleration sensor arrangement and said additional data unit, and that is adapted to selectively transmit said acceleration data or said additional data via a transmission channel;
an occupant protection device; and
an activation unit that is connected to said occupant protection device, and that includes a receiver connected via said transmission channel to said transmitter, and that is adapted to trigger an activation of said occupant protection device in response to said acceleration data in said first value range and not trigger said activation of said occupant protection device in response to said acceleration data and said additional data respectively in said second value range.
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Specification