Optical sensor for measuring the optical reflection properties of an object and / or the transmission properties of a transmission line for use in motor vehicles

摘要

Optical sensor for measuring the optical reflection properties of an object (O) and / or the transmission properties of a transmission path (l1, I2, I3, I4) while determining a measured value, characterized by a. a first signal generator (G1) which generates a transmission signal (S9), b. a first optical transmitter (H1) c. for the transmission of a first optical signal (s1) by this first optical transmitter (H1) as a function of the first transmission signal (S9) in a first and / or second transmission path (l1, I2), d. wherein the first and / or second transmission path (l1, I2) can contain an object (O) ande. wherein the first optical signal (s1) is modified to a second optical signal (s2) when passing through the first and / or second transmission path (I1, I2), and f. for the transmission of a third optical signal (s3) by this first optical transmitter (H1) as a function of the first transmission signal (S9) in a third and / or fourth transmission path (I3, I4), g. wherein the third and / or fourth transmission path (l1, I2) can contain the object (O) and / or a further object (O2) andh. wherein the third optical signal (s3) is modified to a fourth optical signal (s4) when passing through the third and / or fourth transmission path (I3, I4), andi. a first receiver (D1) which receives a second optical signal (s2) at the output of the second transmission link (I2) and generates a first receiver output signal (S0A) as a function of the second optical signal (s2), andj. a second receiver (D2) which receives a fourth optical signal (s4) at the output of the fourth transmission link (I4) and generates a second receiver output signal (S0B) as a function of the fourth optical signal (s4); k. a first multiplication device (M1A) which multiplies a first receiver output signal (S0A) or a signal (S1A, S2A) dependent thereon by the transmission signal (S9) to form a first multiplied intermediate signal (S3A); l. a second multiplication device (M1B) which multiplies a second receiver output signal (S0B) or a signal (S1B, S2B) dependent thereon by the transmission signal (S9) to form a second multiplied intermediate signal (S3B); m. a third multiplication device (M3) which switches or reverses depending on a feedback signal (S8) between the first multiplied intermediate signal (S3A) and the second multiplied intermediate signal (S3B) to form a filter input signal (S4), this reversal also being gradual or flowing can be effected by a discrete-value or continuous-value on the one hand and a discrete-time or continuous-time feedback signal (S8) on the other; n. a filter (F1) which filters the filter input signal (S4) into a filter output signal (S5); o. a mirroring unit (INV1) which multiplies the filter output signal (S5) by the value (−1), the mirroring unit (INV1) generating said feedback signal (S8); p. wherein the amplitude and / or the mean amplitude of the filter output signal (S5) represent the measured value, and / or the amplitude and / or the mean amplitude of the feedback signal (S8) represent the measured value or a further measured value.