摘要:
A sigma-delta modulator is disclosed for conversion of an analog or digital low frequency signal of high resolution into a quantized analog or digital signal, with an error feedback circuit for suppression of quantization errors. The sigma-delta modulator includes a delay device (Z−1) for delaying the input signal (X) for a plurality of scanning periods to obtain a plurality of delayed input signals (Xi), wherein i=1, 2, . . . , n and the ith one of the delayed input signals (Xi) is delayed for i scanning periods; an adder (2) for addition of the delayed input signals (Xi) each delayed by the i scanning periods to obtain a first sum signal (S1); a quantizing device (Q, Q0, Q1 to Qn) for producing quantized input signals (VZi) each delayed by the ith scanning period; an adder (3) for addition of the delayed quantized input signals (VZi) to obtain a second sum signal (S2); and a subtraction device (1) for subtraction of the sum signals (S1, S2) from an actual value of the input signal (X).
摘要:
A method for ascertaining a misalignment of a radar sensor of a vehicle ascertains a misalignment angle of the misalignment using a weighted averaging of calculated differences between first and second angles of radar reflectors relative to various axes. Also described is a device for ascertaining this misalignment.
摘要:
An intrinsically safe digital circuit has at least two output signals and at least four input signals for detecting a potential error in the circuit and/or in one of its input signals, the at least four input signals forming two input signal pairs inverted in a double-track manner, and the at least two output signals forming an output signal pair inverted in a double-track manner. The output signal pair transmits a piece of information which is identical to the one of an input signal pair, when the error is not present.
摘要:
An intrinsically safe digital circuit has at least two output signals and at least four input signals for detecting a potential error in the circuit and/or in one of its input signals, the at least four input signals forming two input signal pairs inverted in a double-track manner, and the at least two output signals forming an output signal pair inverted in a double-track manner. The output signal pair transmits a piece of information which is identical to the one of an input signal pair, when the error is not present.
摘要:
The invention relates to a circuit assembly for operating a sensor array, in particular, a gas sensor array for detecting gases, which comprises at least one signal line. According to said invention, a signal line is divided into two parallel line branches with a sensor and a diode, preferably a Schottky diode, arranged in each of said two parallel line branches, whereby the two diodes have opposite electrical polarity. The use of different polarity diodes permits actuation of both sensors through only one signal line. It can be determined if the current flows through one or the other of both sensors by merely polarizing the electrical potential applied to the signal line appropriately.
摘要:
The invention relates to a method for unambiguously determining a physical parameter Φ using m phase-measured values αi with 1≦i≦m, whereby the phase-measured values αi have different, integer periodicity values ni and an integer periodicity difference (a) with Δn>1 within an unambiguous range E of the physical parameter Φ. A value T with (b) and (c) is calculated based on the phase-measured values αi and the periodicity values ni thereof, and, within a reduced unambiguous range Ered with (d), a value V is allocated to the value T by allocation according to (e), wherein TUk stands for a respective lower limit and TOk for a respective upper limit of T. The allocation intervals between the upper (TOk) and the lower limits (TUk) for T, as wells as the distances (f) correspond at least to the periodicity difference Δn. In order to determine the physical parameter Φ, value V is added up with the C phase-measured values αi in a weighted manner. Δ n = n i - n i - 1 ( a ) T = T ( α j , n i ) ( b ) j , l ∈ Z { 1 , … , i } ( c ) E red = 1 Δ n · E ( d ) V = V ( T ) = { V 1 f u ¨ r T ≥ T O 1 V 2 f u ¨ r T U 2 ≤ T
摘要:
A method for optical measuring data acquisition of a component that moves in a rotary or translatory manner, in particular for optical angle, torque, or distance measurement, includes generation of a first pair of periodic line patterns extending in the movement direction of the component and a second pair of periodic line patterns extending in the movement direction of the component, which each have m periods, in particular n+1 periods, over the movement range of the moving component determination of respective phases of the line patterns of the first pair and of the second pair, determination of the phase position of the first pair of line patterns on the basis of the phases and of the second pair of line patterns on the basis of the phases, and determination of the position of the component on the basis of the phase positions.
摘要:
A scanner-control device for scanning an echo signal formed by returning transmit pulses, includes a clock generator, which triggers a pulse shaper for the transmit pulses and a further pulse shaper for scanning pulses. The scanner-control device also includes setting member for modifying a delay time of the scanning pulses, so that the echo signal can gradually be reconstructed from the returning transmit pulses. Temporally stable transmit pulses and scanning pulses, that are also in a temporal relation to each other, are achieved through the fact that the pulse shaper for the transmit pulses is an element of a first closed loop having a summing point and having a controller, and the further pulse shaper is an element of a second closed loop having a further summing point and a further controller, and that the summing point and the further summing point have supplied to them an identical setpoint value, and the further summing point has additionally a further setpoint value, which is varied to alter the delay time.
摘要:
The circuit arrangement for determining an angle (.alpha.) from analog signals (C,S) proportional to the sine and cosine of the angle (.alpha.) to be determined includesa circuit device for multiplying an analog signal (S) with a digital value (Cs) for obtaining a first product value (S*Cs), the digital value (Cs) being proportional to the cosine of an estimated angle value (.alpha..sub.s) for the angle (.alpha.) to be determined;a circuit device for multiplying another analog signal (C) with another digital value (Ss) to obtain a second product value (C*Ss), the another digital value (Ss) being proportional to the sine of the estimated angle value (.alpha..sub.s) for the angle (.alpha.) to be determined;a circuit device for adding the first and second product values (S*Cs; C*Ss) to obtain a sum value (Su);a circuit device for equalizing proportionality factors of the one and/or the other digital value (Ss; Cs) so that the sum value (Su) formed is proportional to sin (.alpha.-.alpha..sub.s); anda circuit device for adjusting the sum value (Su) to zero so that the estimated angle value (.alpha..sub.s) corresponds to the angle (.alpha.) to be determined.
摘要:
For operational control of a start-up of a rate-of-turn sensor including at least one oscillator element that is excitable to perform a mechanical oscillating motion, a signal proportional to the instantaneous speed or deflection of the oscillator element is amplified and used as the operating signal to operate the oscillator element, during the start-up process for the rate-of-turn sensor, the amplitude of the operating signal is set to a constant specifiable value, the stimulation frequency of the operating signal is increased essentially continuously from a starting value below the main driving frequency of the oscillating motion to a final value above the main driving frequency and below a spurious driving frequency while, simultaneously, the deflection and/or the speed of the oscillator element are monitored in order to determine the main driving frequency of the oscillating motion, once the final value is reached and the main driving frequency is determined, the stimulation frequency of the operating signal is set to the main driving frequency, and the operational regulation of the amplitude and the stimulation frequency of the operating signal are released.