Parallel reading of an analog sensor by two control units
An arrangement for reading a sensor element in a vehicle includes a sensor element. The sensor element has at least one analog signal output. The arrangement further includes a first control unit. The first control unit has at least one first signal input. The arrangement further includes a second control unit. The second control unit has at least one second signal input. The signal output is connected to the at least one first signal input. The signal output is further connected to the at least one second signal input using a voltage divider.
1. An arrangement for reading a sensor element in a vehicle, comprising:
a sensor element including an analog signal output;
a first control unit including a first signal input configured to measure an input signal relative to a first ground reference, the analog signal output being connected to the first signal input;
a second control unit including a second signal input configured to measure the input signal relative to a second ground reference, the first ground reference being at a first voltage offset that is different than a second voltage offset of the second ground reference; and
a voltage divider configured to generate a signal at a predetermined division factor corresponding to a signal from the analog signal output, the voltage divider comprising:
a first input connected to the analog signal output; and
a first output connected to the first input of the first control unit and connected to the second signal input of the second control unit.
2. The arrangement as claimed in claim 1 , wherein the at least one analog signal output is connected to the at least one first signal input directly.
3. The arrangement of claim 1 further comprising:
a data bus connected to the first control unit and the second control unit; and
the first control unit and the second control unit being configured to transmit detected signal levels received from the sensor element using the data bus to reduce or eliminate measurement errors of the signal from the sensor element between the first controller and the second controller.
4. The arrangement as claimed in claim 1 ,
wherein the first control unit is arranged comparatively close to the sensor element and the second control unit is arranged comparatively far from the sensor element.
5. The arrangement as claimed in claim 1 ,
wherein the sensor element is configured as a pedal sensor and the first control unit is arranged on the pedal sensor and the second control unit is in the form of a motor controller.
6. A vehicle comprising:
an arrangement, the arrangement including:
a sensor element including an analog signal output;
a first control unit including a first signal input configured to measure an input signal relative to a first ground reference, the analog signal output being connected to the first signal input;
a second control unit including a second signal input configured to measure the input signal relative to a second ground reference, the first ground reference being at a first voltage offset that is different than a second voltage offset of the second ground reference; and
a voltage divider configured to generate a signal at a predetermined division factor corresponding to a signal from the analog signal output, the voltage divider comprising:
a first input connected to the analog signal output; and
a first output connected to the first input of the first control unit and connected to the second signal input of the second control unit.
7. The arrangement of claim 1 , the voltage divider further comprising:
a second input connected to the first ground of the first control unit; and
a second output connected to a ground reference input of the second control unit.
8. The arrangement of claim 7 further comprising:
a power supply output in the sensor;
a first power supply reference input in the first control unit;
a second power supply reference input in the second control unit; and
the voltage divider further comprising:
a third input connected to the power supply output in the sensor; and
a third output connected to a power supply reference input of the second control unit.