Patent ID: 11959957
Assignee: CONTINENTAL AUTOMOTIVE GMBH
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A device for measuring at least one parameter of a motor vehicle, said device comprising at least one reference resistor of a predetermined value and at least two measuring branches, each of said at least two measuring branches comprising at least a first element comprising a resistor or a resistive sensor, able to be connected to a voltage supply, and a second element comprising a resistor or a resistive sensor able to be connected to a ground, the first element and the second element being connected to one another at a center tap, the center taps of the at least two measuring branches being connected to one another in pairs by a third element comprising a resistor or a resistive sensor, said device comprising a control module able to:
a) connect the center tap of the second measuring branch to the voltage supply or to ground,
b) measure the value of the voltage defined between the center tap of the first measuring branch and ground,
c) calculate the resistance value of the first resistive sensor and the resistance value of the fourth resistive sensor from:
d) a voltage value measured between the center tap of the first measuring branch and ground when the center tap of the second measuring branch is connected to the voltage supply,
e) a voltage value measured between the center tap of the first measuring branch and ground when the center tap of the second measuring branch is connected to ground,
f) a value of the supply voltage and
g) the predetermined value of the reference resistor,
h) determine the measurement of the parameter measured by the first resistive sensor and the fourth resistive sensor,
i) connect the center tap of the first measuring branch to the voltage supply or to ground,
j) measure the value of the voltage defined between the center tap of the second measuring branch and ground,
k) calculate the resistance value of the second resistive sensor and the resistance value of the third resistive sensor from:
l) a voltage value measured between the center tap of the second measuring branch and ground when the center tap of the first measuring branch is connected to the voltage supply,
m) a voltage value measured between the center tap of the second measuring branch and ground when the center tap of the first measuring branch is connected to ground,
n) a value of the supply voltage and
o) a resistance value of the fourth resistive sensor,
p) determine the measurement of the parameter measured by the second resistive sensor and the third resistive sensor.