59results about How to "Accurate delay time" patented technology

A ring oscillation circuit, which can operate the ring oscillation due to a positive feedback stably and continuously, is provided and it is applied to an accurate measurement of delay time and a measurement of timing accuracy in a jitter of a clock signal or the like with a high accuracy. A ring oscillation circuit comprises a delay circuit and a monostable multivibrator. An output of the delay circuit is connected to an input of the monostable multivibrator, an output of the monostable multivibrator is connected to an input of the delay circuit, and the delay circuit and the monostable multivibrator configure a positive feedback loop. An oscillation starting circuit for starting oscillation upon receipt of an input of a trigger pulse for triggering oscillation is provided on the positive feedback loop, or in the inside of the delay circuit or the monostable multivibrator.

The invention discloses a system and a method for measuring frame delay time of a photographing system of an optical measurement device. The system comprises an image recording apparatus (1), a photographing system (2), a timing terminal (3), a control and display LED (Light-Emitting Diode) lamp array apparatus (4) and an LED lamp array (5). The method comprises the following steps of: judging the number of image outputting delay frames of a video camera, according to the time information on a digital image output by the photographing system and the information of the LED lamp array; providing time and external interruption signals by the timing terminal; recording the image of the photographing system and superposing the time information of the recording moment by the image recording apparatus; controlling an LED array to turn on or turn off the LED lamps by the control and display LED lamp array apparatus according to the external interruption signal and the time information; and imaging the LED array by the photographing system. The system and the method provided by the invention realize accurate calibration on image outputting delay time of the photographing system.

A hoist synchronization apparatus and method using a master controller operating software that provides a pulse reference to a slave controller. The slave commands its motor to rotate at the speed conveyed by that pulse reference. The slave controller monitors the pulse feedback from both the master encoder and the slave's encoder and compensates for any position error by adjusting its motor output speed. In addition, the slave controller includes the capability to automatically resynchronize the hoists. Resynchronization is accomplished by storing position error generated when either the master or the slave is run independently and correcting for the error when both units are operated at a later time.

The invention discloses a method for obtaining circuit delay time in an ultrasonic measuring device. The method has the following advantages of: by using the characteristic that a first ultrasonic energy converter and a second ultrasonic energy converter can send an ultrasonic signal and receive the ultrasonic signal, controlling the switching on and the switching off among four ports of a selector switch by a controller; realizing the sending and the receiving of the ultrasonic signals with five different modes; and respectively obtaining five different total times by a timer; and obtaining the circuit delay time by combining with the format of the each total time through the minimum square law, thereby being capable of obtaining the propagation time of the ultrasonic signal in physical medium. Furthermore, the method has simple computing process and more accurate circuit delay time.

A jitter inducing circuit receives a reference pulse train and induces desired amounts of jitter to the rising and/or falling edges of the pulses. First and second delay blocks 16 and 18 alternately delay the selected edge or edges of the provided reference pulse train interval by preset delay times for every interval. A signal composer 46 composes the outputs of the first and second delay blocks 16 and 18. A delay time setup circuit controls the delay times of the delay blocks 16 and 18. The delay times may change for each interval as a function of time so as to trace a desired function such as a sinusoidal or triangular function.

The invention discloses a device and a method for detecting signal circuit delay time in an ultrasonic detection device. The method for detecting the signal circuit delay time comprises a microprocessor, a picosecond level timing chip, a wave shaping circuit, a control gate circuit, a filter amplifier circuit, a zero cross detection circuit, an AND gate circuit, a first counter, a second counter, a third counter, a first connecting change-over switch and a second connecting change-over switch. The total time T1, T2 and T3 from transmitting to receiving a primary ultrasonic echo signal, a secondary ultrasonic echo signal and a ternary ultrasonic echo signal are respectively calculated via the picosecond level timing chip, and the delay time phi=T1+T2-T3 of a signal in a circuit is calculated via the T1, T2 and T3. Three discrimination technologies of wave contrast, counting and time limitation are adopted for the three times of ultrasonic echo recognition, so that clutter interference is eliminated, the accuracy of echo is ensured, and the delay time of the ultrasonic signal in the circuit can be accurately obtained.

An on-vehicle apparatus detects at least one of right and left edges of a road on and along which a vehicle travels. In the apparatus, acquired is information indicative of a plurality of detection points which are given as a plurality of candidates for the edges of the road viewed forward from the vehicle. Further acquired is information indicative of behaviors of the vehicle. A calculating member calculates, based on the acquired information, every detection point, a plurality of passing positions each indicating a position of each of the detection points to a position of the vehicle provided that the vehicle travels to a position on the road which is located right beside each of the detection points. A road edge obtaining member obtains the edges of the road based on the plurality of passing positions calculated.

The present invention is related to a delay unit, and more particularly to a delay unit with respect to delay an input signal. The delay unit comprises a ring oscillator and a counter. The ring oscillator receives an input signal and generates a clock signal. The counter connects to the ring oscillator for receiving the clock signal and generating a delay signal. The delay signal feeds back to the ring oscillator to stop the ring oscillator, and the power consumed in the delay unit can be reduced. The ring oscillator comprises a plurality of inverters and the counter comprises a plurality of flip-flops, and the delay unit can generate an accurately and/or large delay time by changing the number of the inverters and/or the flip-flops.

A delay-time correction circuit delays an input signal for generating a pre-drive signal to a drive unit generating a drive signal. A transition-change sensor senses a transition change in one of a turn-on operation and turn-off operation. A correction-signal generator generates a correction signal in response to the transition change sensed by the transition-change sensor and to the input signal. A delay output unit generates an output signal corresponding to the pre-drive signal by delaying the input signal using the correction signal. The delay output unit delays the output signal that instructs the other of a turn-on operation and turn-off operation, from the input signal, in accordance with a length of a period for the transition change in the one of a turn-on operation and turn-off operation that is performed immediately before the other of a turn-on operation and turn-off operation.

The invention provides a measuring device for lag time of a pressure transmission system. The measuring device comprises a data input module, a pressure source, a first pressure sensor and a delay time collecting module, wherein the pressure source is used for being connected to the output end of the data input module; the first pressure sensor is used for being connected to the output end of the pressure source, the output end of the first pressure sensor is used for being connected to the input end of the pressure transmission system, and the pressure transmission system comprises pressure pipelines; the delay time collecting module is used for being connected with the output end of the pressure transmission system and the output end of the first pressure sensor, the output end of the first pressure sensor outputs a pressure-time curve table of the input end of the pressure transmission system, and the output end of the pressure transmission system outputs a pressure-time curve table of the output end of the pressure transmission system; the delay time collecting module collects and compares the pressure-time curve tables of the input end and the output end of the pressure transmission system to obtain the lag time of the pressure transmission system.

The embodiment of the invention provides a delay-constant PTP (peer to peer) signal protocol conversion system and implementation method thereof. The delay-constant PTP signal protocol conversion system further comprises a PTP signal protocol conversion device, wherein the PTP signal protocol conversion device mainly comprises a signal receiving module, a protocol conversion module and a signal transmitting module and is used for adding timestamps when a PTP signal protocol is converted and a PTP signal enters and departs from a protocol converter; the delay-constant PTP signal protocol conversion system comprises a first PTP signal protocol conversion device and a PTP signal receiving device; and the PTP signal receiving device is used for receiving a conversion protocol transmitted by the first PTP signal protocol conversion device and the PTP signal added with the timestamps, settling the delay time of a protocol conversion process and removing the delay time in a time synchronizing process.

The invention relates to a precise delay method for a digital detonator. The precise delay method comprises the following steps: S1: mounting the digital detonator at an explosion site, and electrically connecting the digital detonator to an exploder; S2: sending standard precise time with designed time length to the digital detonator by virtue of the exploder; and S3: calculating delay time according to standard precise time by virtue of the digital detonator. According to the precise delay method, by taking the standard precise time sent by the exploder as reference, an error range of internal vibration of the digital detonator is corrected, so that the precise delay time is calculated, and the precision is greatly improved, and therefore, an MCU, a single chip microcomputer and the like with relatively great internal vibration error range can be used for manufacturing the digital detonator, the limitation, related to time precision, of the prior art is broken through, and wide popularization and application of the digital detonator is facilitated.

A preparative chromatograph for collecting target components in a sample temporally separated in a column of a chromatograph in respective preparative containers is provided with: a detection unit having a flow cell accommodated in a housing and a detector for detecting a component that passes through the flow cell; a first pipe that connects the column and an inlet end of the flow cell; a flow path switching unit accommodated in the housing and configured to selectively flow the components that passed through the flow cell through a preparative flow path that is a flow path connected to the preparative containers or a waste liquid flow path; and a second pipe accommodated in the housing and connecting an outlet end of the flow cell and the flow path switching unit.

The present invention relates to a method for managing an MMT buffer model using a reception quality feedback (RQF) message from an MMT reception entity, comprising the steps of: receiving, from an MMT transmission entity, a measurement configuration (MC) message; measuring maximum transmission delay and minimum transmission delay, according to a request by the MC message that is received; renewing an RQF message including the maximum transmission delay and minimum transmission delay that have been measured; and transmitting the renewed RQF message to the MMT transmission entity.

The invention discloses a dynamic time delay adjusting device and method for unginned cotton foreign fiber sorting system. The device comprises a first linear array CCD camera, a second linear array CCD camera, a cotton falling cavity, a gas spray valve, a spray valve driver and an embedded type FPGA image processor; the first linear array CCD camera and the second linear array CCD camera are positioned at two sides of the cotton falling cavity with vertical height difference h existing between the two cameras, images of unginned cotton lumps falling in the cotton falling cavity are collected, the first linear array CCD camera and the second linear array CCD camera are connected with the embedded type FPGA image processor via CameraLink wire cables, the spray valve driver is connected with the embedded type FPGA image processor via a difference signal wire cable, and the gas spray valve is connected with the spray valve driver. According to the dynamic adjusting device and method, the embedded type FPGA image processor is used for image processing operation and feature matching operation, unginned cotton flow falling speed can be accurately measured and calculated, foreign fiber striking time delay of the unginned cotton foreign fiber sorting system can be dynamically adjusted, and accuracy of the unginned cotton foreign fiber sorting system can be improved.

The invention relates to a periodic signal generating device for outputting slight oscillation signals. The periodic signal generating device comprises a slight oscillation reference voltage generating unit, a comparator unit and a wave-shaping and time-delay unit. The slight oscillation reference voltage generating unit outputs slight oscillation lower-limit reference voltage and slight oscillation upper-limit reference voltage, and the absolute value of the difference of the slight oscillation lower-limit reference voltage and slight oscillation upper-limit reference voltage is enough small so that the slight oscillation lower-limit reference voltage and slight oscillation upper-limit reference voltage are simultaneously logic low electrical levels or logic high electrical levels. One input end of the comparator unit is connected to an output end of the slight oscillation reference voltage generating unit and the other input end of the comparator unit is connected to a slight oscillation signal. An input end of the wave-shaping and time-delay unit is connected to an output end of the comparator unit and is used for outputting a slight oscillation signal and the slight oscillation signal periodically oscillates in a range from the slight oscillation lower-limit reference voltage to the slight oscillation upper-limit reference voltage.

The invention relates to a delay time obtaining method and apparatus for a remote-controlled driving apparatus. A method for obtaining delay time in circulation is provided and realized. Video signal delay and control signal delay during the process of obtaining the delay time are taken into consideration, so that more accurate delay time can be timely obtained without substantially increasing CPU loads. Real-time performance and good view of frame display of the remote-controlled driving apparatus are ensured.