53 results about "Intervalometer" patented technology

A Time-Resolved PET imaging system for producing an event-by-event, real-time, high resolution, three-dimensional positron emission tomographic images without performing sinogram formation or image reconstruction. The third dimension is provided by measuring the ΔT between the arrival times of gamma rays from a positron event being detected by two cooperating detectors. In order to determine the location of a positron event along the lines of response, the measurement includes a fast scintillator, constant fraction discriminator and the digital intervalometer. The arrival time of each photon in the annihilation process is recorded with respect to a clock frequency with picosecond resolution. This approach requires significantly fewer positron events, thus requiring fewer detectors, thereby resulting in an gamma event-by-gamma event, real-time TPET imaging system that is more efficient and more economical to produce than conventional PET systems.

The invention discloses an Internet of Things environment control method and device based on context-aware. The method comprises the following steps: an environment control device in a network collects context-aware data to judge whether people are in a controlled zone or not; if people are in the controlled zone, the environment control device ensures that an intervalometer resets to a set time, humiture is processed by treating forecast average vote numbers as a PMV value, and then correspondence of the data is performed according to a set value table, a comfort degree mapping table and a control rule mapping table to obtain a control strategy of a controlled terminal; if people are not in the controlled zone, the environment control device detects whether a working controlled terminal exists or not, if no, no operation is carried out; if yes, the turning on or the turning off of the intervalometer is judged, if the intervalometer is turned off, the turning on of the intervalometer is performed, and when the intervalometer returns to zero, a control command is transmitted to close the working controlled terminal, if the intervalometer is turned on, countdown is performed continuously until the intervalometer returns to zero, or the controlled zone is detected again to ensure that whether people are in or not. The method and the device, provided by the invention, can realize intelligently real-time control of the controlled terminal to adjust the environment so as to meet comfort degree requirements of users.

The present application provides a frequency discrimination method for locating a time-hopping signal of a base station. The frequency discrimination method includes: calculating the frequency error of the local reproduced time-hopping signal according to the interval of adjacent time-hopping pulses in the time-hopping signal. The present application also provides a frequency discrimination device for locating the time-hopping signal of the base station. The frequency discrimination method and frequency discrimination device for locating the time-hopping signal of the base station provided by this application fully combine the time-hopping characteristics of the time-hopping signal, and can obtain the frequency error of the local reproduced time-hopping signal according to the characteristics of the time-hopping signal. In this way, the convergence speed of the frequency locked loop can be accelerated, the initial traction force of the frequency locked loop can be effectively enhanced during the carrier tracking process of the time-hopping signal, and the tolerance range of the frequency locked loop to the initial Doppler estimation error can be improved.

The invention provides a time synchronization method of a distributed relay protection device. According to the invention, accurate second edge positioning is realized between the main machine and thesub-machine by using the crystal oscillator counter. The calculation of the next second interval, the next second sampling value sending interval and the next second remainder averaging interval is realized through a second interval calculation method and a remainder averaging algorithm in the second interval. The problems that in the time synchronization process, the discrete performance of timescales fluctuates greatly, and high-precision time synchronization cannot be carried out between a host and a sub-machine when no GPS signal exists are solved. The discrete value of the sampling value sending interval is kept at the nanosecond level through the remainder equalization algorithm in the second interval, so that the stability of the sampling value sending period is greatly improved,high-precision time synchronization between the distributed host and the sub-machine of the relay protection device can be realized without the help of an external GPS signal, and the reliability of relay protection is improved.

The invention discloses a remaining hot water detection device and a time correction method of an electric water heater. The time correction method in the detection of the remaining hot water of an electric water heater includes the following steps: S1: Presetting each temperature range in a plurality of temperature ranges S2: Real-time detection of the actual water temperature of the electric water heater in the state of water use; S3: When it is detected that the actual water temperature at two time points is the same as the two temperature endpoints of one of the temperature intervals, record the above two The actual time interval of a time point; S4: Calculate the average value of multiple actual time intervals corresponding to the same temperature interval; S5: Use the average value as a correction parameter to correct the initial time interval of the corresponding temperature interval. The time correction method in the detection of the remaining hot water of the electric water heater according to the embodiment of the present invention can adaptively correct the time parameter in the remaining hot water, thereby improving the accuracy of the detection result of the remaining hot water.

The invention relates to a control method and an apparatus for weak light imaging. A control method for sampling time adaptive single photon compression imaging comprises the steps of : setting experimental parameters, sending a command to start measurement; inputting a single photon pulse and a high frequency clock to a synchronous control pulse generating circuit to generate a synchronous control pulse, and inputting the synchronous control pulse to a sampling time measurement module and a measurement matrix loading module; the sampling time measurement module performing pulse interval measurement on the high frequency clock in a counting manner; the measurement matrix loading module loading a frame measurement matrix after detecting a rising edge of a synchronous control pulse signal, and sending the matrix to a PC host computer; the PC host computer reconstructing a compressed sensing image based on the received measurement matrix and the a pulse interval count. A control apparatusfor the sampling time adaptive single photon compression imaging comprises a PC host computer, a host computer communication module, the synchronous control pulse generating circuit, the sampling time measurement module and the measurement matrix loading module.

The invention provides an LTE-based frequency offset processing method and system. The method includes setting the maximum time interval threshold for twice PUSCH scheduling for the user equipment on the base station side, and the threshold for the number of consecutive decoding errors, the user equipment side sends PUSCH data corresponding to the PUSCH scheduling on a predetermined resource, and the base station side uses the accumulated frequency offset The value performs frequency offset compensation on the received PUSCH data and calculates and updates the cumulative frequency offset value in real time. The updated cumulative frequency offset is used for subsequent TTI frequency offset compensation. The comparison between the count and the threshold of the number of consecutive decoding errors adjusts the maximum time interval threshold of two PUSCH scheduling in real time, and the base station side maintains the time interval count in real time, and judges whether to send to the user equipment according to the comparison between the time interval count and the threshold and whether there is PUSCH scheduling Forcibly send PUSCH scheduling to improve the frequency and accuracy of frequency offset estimation on the base station side.

The present invention discloses methods and apparatus for optimizing the noise performance of integrated circuits. The method is used to arrange the target wiring in the target area, and the method includes: for each wiring in the target wiring, obtaining its signal transition interval for every other wiring in the target wiring, wherein one wiring is for another wiring The signal transition interval is the time interval between the signal transition of the one wiring and the signal transition on the other wiring; the corresponding time impact factor is calculated according to the signal transition interval, wherein the The time influence factor is a decreasing function of the signal transition interval; and the target wiring is arranged in the target area according to the time influence factor. By adopting the technical solutions according to the embodiments of the present invention, the coupling noise between wirings can be reduced.

An electronic device for acquiring encoder speed information and a method for implementing the same are provided, wherein the electronic device includes an encoder for electrically outputting an encoder signal corresponding to a driving speed, a processor unit for outputting a preset interval count value based on the resolution of the encoder, and an integrated circuit unit for outputting the interrupt count value for calculating information using the encoder signal and the interval count value. By acquiring the encoder speed information in this manner, control performance can be improved.

The invention discloses a method for accurately controlling the output of the timing switching value in a distributed system, comprising the following steps: obtaining the PPS interval through a hard bus synchronization signal; calculating the deviation of the local crystal oscillator; obtaining the relative time difference and the exit state of the timing switching value output; calculating the exit The time difference between the timing outlet of the board card and the PPS time; when the timing is interrupted or triggered according to the timer function, the timing switch output, the distributed system of the present invention can accurately control the timing switch output method, which can break through the control board. The limitation of I / O control, through the inter-board communication mechanism and the coordination between boards and cards, ensures the control accuracy of the timing exit, and provides a solution for the application scenarios that require accurate timing exit.