109 results about "Measure duration" patented technology

A PLL includes a loop filter for accumulating charge to generate a loop-filter voltage and a VCO having a plurality of frequency ranges. The VCO receives the loop-filter voltage and generates an output signal having a frequency according to the loop-filter voltage and a currently selected VCO frequency range. During PLL calibration, the loop-filter is connected to a constant voltage source; the PLL feedback signal is synchronized with the reference signal; a linear search, a binary search, or a memory lookup is used to find a first and a second VCO frequency range; first and second time durations are measured for the time durations between the second rising edges of the reference signal and the PLL feedback signal for the two VCO frequency ranges, and the optimal VCO frequency range is determined by setting the VCO frequency range to be the VCO frequency range having the shortest measured time duration.

A method and apparatus for measuring drowsiness particularly in vehicle operators measures the amplitude to velocity ratio for eyelids closing and opening during blinking as well as measuring duration of opening and closing. The average values for the amplitude to velocity ratios for opening and closing are weighted and added to give a drowsiness measure that is compared to a scale of drowsiness based on data collected from alert and drowsy subjects. Other eye movements can be used in the weighted algorithm. The scale of drowsiness predicts the onset of drowsiness levels that render an operator unfit to continue.

A pulse controller device for controlling the excitation of a heat source used in thermographic imaging is disclosed. The pulse controller device comprises a power supply, a heat source coupled to the power supply, a device coupled to the power supply signaling the power supply to deliver electrical power to the heat source, a sensor for sensing the delivery of electrical power to the heat source, a flash duration module coupled to said sensor for measuring a duration of time, and a gate device coupled to said flash duration module for gating the electrical power utilized by the heat source. A method for thermographically evaluating a sample is also disclosed.

The invention relates to a device for the analog / digital conversion of a measuring voltage (Ue), said device comprising an analog / digital converter (1) provided with an integrator (2) with an operation amplifier (OP1), a resistance (R) and a capacitor (C) in the feedback loop. A reference voltage (Uref) is applied to the inverting input of the operation amplifier (OPI), and the measuring voltage (Ue) is applied to the non-inverting input of the operation amplifier (OPI). The capacitor (C) is charged during a charging phase of the period (t1) and discharged during a discharge phase of the period (t2). The analog / digital converter (1) also comprises a comparator (3) which is mounted downstream from the operation amplifier (OPI), a memory element (4) which is mounted downstream from the comparator (3), a time generator (6) for generating the charging time (tl), and a counter (8), said counter (8) detecting the edges or the duration (T = tl + t2) of the pulsewidth-modulated output signal (Uout) generated at the output by the A / D converter (1). The inventive device is also provided with a synchronisation element (5) that synchronises the edges of the pulsewidth-modulated output signal with the clock pulse of the counter (8) at least over a pre-determined measuring period (X).

A process for automatically detecting and configuring with the throughput of a network, in which a device: (a) goes into a listen mode; (b) obtains a triplet of successive transitions in a transmitted signal, the triplet delimiting first and second signal levels, one dominant and the other recessive; (c) measures the duration of each of the first and second levels; (d) as a function of the measured durations, obtains a new throughput configuration by determining values for parameters that define a bit length LBIT; (e) validates the new throughput configuration; (g) if at least one throughput adaptation condition is verified, goes into a normal mode, otherwise obtains a next transition of the signal, which delimits with the last previous transition a new level of the signal, then measures the duration of the new level and reiterates steps (d) to (g) taking account of the new signal level.

In a specimen analysis system: incident light is injected into a specimen at an injection position on the specimen; an information acquisition unit acquires first information carried by light exiting from each of positions in a first region of the specimen in response to injection of the incident light into the specimen for a first duration of measurement, and second information carried by light exiting from each of positions in a second region of the specimen in response to injection of the incident light into the specimen for a second duration of measurement longer than the first duration of measurement; and an information processing unit calculates a characteristic of the specimen on the basis of the first and second information. The first region is located within a predetermined distance from the injection position, and the second region is located farther from the injection position than the first region.

The invention relates to a laser distance meter (1) which has a laser light source (5) for emitting time-modulated laser light (13) to target objects (15, 17), a light detector (7) for detecting laser light reflected by the target objects (15, 17), and an electronic control and analyzing unit (9) for controlling the laser light source (5) and for analyzing signals of the light detector (7). The light detector (7) is designed to directly scan laser light which is modulated with frequencies ranging from 10 MHz to 5 GHz, preferably 100 MHz to 1.5 GHz, in a synchronous manner. The laser distance meter (1) is characterized in that the electronic control and analyzing unit (9) is designed to carry out the following method steps: actuating the laser light source (5) in order to emit laser light (13) at a plurality M of at least 20, preferably at least 100, distinctly different modulation frequencies fm (m = 1... M) in a successive manner, detecting the laser light reflected by the target objects (15, 17) by directly scanning the laser light in a synchronous manner over a measurement time duration [delta]t, and generating a detection signal lm for each of the modulation frequencies fm; carrying out a Fourier transformation with respect to each of the detection signals lm in order to generate a discrete transit time spectrum Lm; and evaluating the transit time spectrum Lm in order to ascertain at least one distance D between the laser distance meter (1) and at least one of the target objects (15, 17).