38results about How to "Accurate clock" patented technology

In a programmable logic device having high-speed serial interface channels, a clock distribution network for providing one or more high-speed clocks to dynamic phase alignment circuitry of those high-speed serial interfaces includes at least one bus that is segmentable (e.g. using tristatable buffers). This allows the bus to be divided into different portions that can be connected to different clock sources when the high-speed serial interfaces are running at different speeds. In one embodiment, the segmenting elements (e.g., the aforementioned buffers) are located between selected channels (e.g., every fourth channel), limiting the size of the different segments. In another embodiment, segmenting elements are located between each channel, allowing complete user freedom in selecting the sizes of the segments. Thus, instead of providing a bus for every clock source, multiple clocks can be made available to different channels by segmenting a single bus.

The invention discloses a computer control system based on a 2-out-of-2 structure and an implementation method thereof. The system comprises a safety management layer and a 2-out-of-2 execution layer with two processors, wherein the safety management layer is connected with the 2-out-of-2 execution layer through a high-speed communication bus; the 2-out-of-2 execution layer is used for finishing application processing of each stage, finishing data comparison of different stages, and sending synchronous state signals and data comparison results to the safety management layer; and the safety management layer is used for controlling and judging the synchronous states of the two processors in the 2-out-of-2 execution layer and judging whether the data comparison results of the two processors are consistent or not.

In a programmable logic device having high-speed serial interface channels, a clock distribution network for providing one or more high-speed clocks to dynamic phase alignment circuitry of those high-speed serial interfaces includes at least one bus that is segmentable (e.g. using tristatable buffers). This allows the bus to be divided into different portions that can be connected to different clock sources when the high-speed serial interfaces are running at different speeds. In one embodiment, the segmenting elements (e.g., the aforementioned buffers) are located between selected channels (e.g., every fourth channel), limiting the size of the different segments. In another embodiment, segmenting elements are located between each channel, allowing complete user freedom in selecting the sizes of the segments. Thus, instead of providing a bus for every clock source, multiple clocks can be made available to different channels by segmenting a single bus.

A portable apparatus can receive a GPS signal from a GPS satellite and obtain positioning information. The portable apparatus can thus present a distance traveled. The portable apparatus can clock gross time from competition start specified time or in response to clocking initiation operation each of which serves as clocking initiation timing. The portable apparatus can further initiate clocking concurrently with or after the gross time clocking initiation and clock net time the clocking of which can be temporarily discontinued and resumed. The gross time and the net time can be displayed on a touch panel.

The invention is intended to achieve detection of a source voltage without providing a voltage detection circuit and allow a drive stop while holding correct drive pulse information when the source voltage is lowered to a predetermined level or below. A detection segment for detecting the state of rotation of a stepping motor is divided into a plurality of segments and, when a pattern of an induced signal detected in the respective segments is a pattern which indicates that the voltage of a secondary battery is lowered to the predetermined voltage or below, the control circuit memorizes a polarity of the drive pulse used in the last driving in a polarity memory and stops the driving of the stepping motor. When the voltage of the secondary battery is restored to the predetermined voltage or higher, the driving is restarted by a main drive pulse having a polarity opposite from the polarity memorized in the polarity memory.

A system and method in accordance with the present invention allows for an adapter to be utilized in a server environment that can accommodate both a 10 G and a 1 G source utilizing the same pins. This is accomplished through the use of a high speed serializer / deserializer (high speed serdes) which can accommodate both data sources. The high speed serdes allows for the use of a relatively low reference clock speed on the NIC to provide the proper clocking of the data sources and also allows for different modes to be set to accommodate the different data sources. Finally the system allows for the adapter to use the same pins for multiple data sources.

The present invention is directed to energy-efficient hibernation in indoor wireless localization systems. A tag passively associates with a detection point (DP) and establishes a reveille time. The tag will awaken at the reveille time and send or receive a beacon to or from its associated DP. If the tag is receiving a beacon, it will awaken, receive, phase-lock its clock based on when the beacon was expected and when it was actually received, and return to hibernation. The DP transmits a scattershot of beacons, one for every tag in the system. If the tag is sending a beacon, it will awaken, send its beacon, and return to hibernation. The DP will receive the beacon and adjust its own clock based on the delay between when the beacon was expected and when it was actually received. The tag will broadcast its location to the DP on a set interval.

A piezoelectric quartz plate having reduced frequency deviation as a function of temperature, wherein the quartz plate is cut at an angle described by:Tf=⁢3.9+6.5⁢⁢cos2⁢⁢θ+⁢12⁡[c66⁢Tc66⁢sin2⁢θ+c44⁢Tc44⁢cos2⁢θ+Tc14⁢c14⁢sin⁢⁢2⁢⁢θc66⁢sin2⁢θ+c44⁢cos2⁢θ+c14⁢sin⁢⁢2⁢⁢θ]+⁢[a′·(sin⁡(ω·θ+ϕ′)+sin⁡(ω·θ+ϕ′)2)]+δwhere quartz plate thickness is chosen in accordance with a desired frequency. This useful behavior can be manipulated such that a quartz plate is designed to counteract frequency shifts over temperature excursion of other electrical components found in typical oscillator circuits. The choice of angles of cut having larger margins of error means that quartz oscillators can be more easily reproduced on a large scale and at a lower cost than has traditionally been the case.

The invention relates to a roadside equipment clock accuracy test method and system based on a floating vehicle, and the method comprises the steps: retrieving and recording GPS records nearby roadside equipment, including vehicle GPS positioning information and time information; forming a passing track record of the vehicle passing by the roadside equipment based on the obtained GPS record; basedon the GPS positioning information of the vehicle passing through the roadside equipment each time, establishing a fitting model to predict the real GPS time of the vehicle passing through the roadside equipment; and matching data records of the same vehicle passing through the same road side equipment, and checking whether the observation time of the road side equipment is consistent or not by utilizing the real GPS time when an event occurs. The method and the system are low in cost and easy to implement, and have good accuracy and stability.

The invention relates to a circuit structure and method for realizing clock recovery on the basis of a USB device. The circuit structure comprises a built-in oscillator module for generating oscillation signals; and a digital control logic module which includes a USB clock recovery unit for sampling the oscillation signals of the built-in oscillator and performing the clock recovery and a frequency adjustment unit for adjusting the oscillation frequency of the built-in oscillator according to a comparison result between USB signals and the oscillation signals of the built-in oscillator. By using the circuit structure and method for realizing the clock recovery on the basis of the USB device through such a structure, an accurate system clock can be generated, a frequency tracking feature is exhibited, a USB data transmission frequency is compared with the frequency of the built-in oscillator through adoption of the digital control logic module, the frequency of the built-in oscillator is automatically switched among a low-speed state, a medium-speed state and a high-speed state, the system precision and the stability are guaranteed, the production cost is decreased, and the application scope is wider.

The invention discloses a system and a method for realizing DSD audio hardware decoding. The system comprises an application processor module, wherein the application processor module is used for acquiring and analyzing original audio data, and transmitting a data bus address as well as data parameters and audio data in an analysis result to an audio processing module by means of a data bus; the data parameters comprises a data sampling rate, a bit number, a code stream, whether or not it is a DSD format, the DSD format, and modes that a back-end digital-to-analog conversion module needs to support; the audio processing module reads the data parameters and the audio data according to the data bus address, decodes the audio data according to the data parameters, and transmits the decoded audio data to a digital-to-analog conversion module; the digital-to-analog conversion module is used for converting the decoded audio data into an analog audio signal for output; and an asynchronous dual-crystal-oscillator clock is used for outputting a clock signal to the audio processing module. The system and the method realize the effect of supporting the playing of DSD audio of all specifications, realize precise playing of a full sampling rate and achieve good sound effect.

The invention discloses a multifunctional alarm clock system for a classroom, relating to the technical field of electronic information. The system comprises a central server and a plurality of terminals connected with the central server, each terminal is hung in a corresponding classroom, the unified correction of clock information is realized between the central server and the terminals througha self-organizing algorithm, the terminals obtain classroom schedules of all classrooms on the same day through the central server; the terminals comprises power supply modules and also comprise embedded microprocessors, network modules, storage modules, LCD display modules and sound modules which are connected with the power supply modules. When the embedded microprocessors are in each schedule time period, corresponding schedule information is displayed through the LCD display modules and / or corresponding audio schedule information is played through the sound module, the time schedule information is displayed through the LCD display modules in a course time period or an examination time period, the attention of students is prevented from being distracted, the system is more practical through automatic management and a control terminal, and the system is convenient for students, teachers and supervisors to use in schools.

A method for realizing real time clock in television set, which contains, 1, receiving remote code from television set remote controller, 2, resolving attached real time clock information, 3, refreshing and correcting the clock in television set by said real time clock information.

The invention discloses a vehicle gesture monitoring module which comprises a singlechip, a power supply chip connected with the singlechip, a storage chip, a GPS (global positioning system) chip, a triaxial acceleration transducer compass module, an atmospheric pressure module, a clock chip, two ways of CAN (controller area network) chips and a serial port chip, wherein the power supply chip is respectively connected with the storage chip, the GPS chip, a WF triaxial acceleration transducer compass module, the atmospheric pressure module, the clock chip and the serial port chip. The vehicle gesture monitoring module disclosed by the invention is simple in structure, and is convenient to use; the monitoring using effect is good; the monitoring data range is wide; and the monitoring of each vehicle driving data in the driving of an automobile is ensured, thus the driver can grasp each item of variation information of the automobile at any time, and the safety of vehicle driving is ensured.

The invention discloses a multi-node test system, and the system can comprise: a central server which is used for transmitting a test instruction and receiving test data; and multiple test nodes, wherein one or more of the plurality of test nodes receive a test instruction from the central server, execute a test according to the test instruction and transmit test data to the central server, and the central server and the plurality of test nodes execute clock synchronization, so that the central server and the plurality of test nodes are consistent in clock. The multi-node test system can provide reliable test results and reduce wiring. The invention further discloses a multi-node test method by using the multi-node test system.

The invention discloses a multifunctional landscape lightening controller. The controller comprises an MCU processing module, the MCU processing module is connected with a serial data caching / concurrence module, an SPI (Serial Peripheral Interface), a real-time clock module, a frame synchronization interface and a parameter setting interface, the serial data caching / concurrence module is connected with the SPI via an SPI serial data bus, and the data caching / concurrence module is also connected with multiple independent output modules. The invention also discloses a realization method of the multifunctional landscape lightening controller. The controller and realization method thereof are characterized by simple structure, low cost, high-speed data caching / concurrency, high light softness, multiple interfaces and wide application range.

The invention discloses a clock power supply device which comprises a clock battery power supply module, a main power supply module, a super capacitor charging and discharging module and a meter reading battery power supply module which are connected in sequence, the clock battery power supply module comprises a replaceable clock battery. The positive electrode of the clock battery is connected with the positive electrode of the first diode and the positive electrode of the second diode. The meter reading battery power supply module comprises a replaceable lithium battery, the anode of the lithium battery is connected with the input pin of an LDO power supply, and the output pin of the LDO power supply is connected with the anode of a third diode; the main power supply module comprises anAC / DC step-down switching power supply circuit. The super capacitor charging and discharging module comprises a super capacitor charging circuit and a super capacitor discharging circuit. According tothe clock power supply device, the clock power supply can be maintained for 48 hours through the super capacitor even if an extremely abnormal condition occurs, so that the clock can be ensured to bemaintained accurately when a battery is replaced by an electric power worker.

The invention relates to a current detection device and method for a vehicle lamp temperature test. The device comprises a test box for accommodating a test sample, a PLC controller for controlling atest sample to work, a current signal detection unit for collecting current signals of a test sample and a current recorder for recording the current signals, wherein the PLC controller, the current signal detection unit and the current recorder are all arranged outside the test box; the current recorder is connected with the PLC controller and the current signal detection unit respectively; the test sample is arranged in the test box, the current detection device is power-on, the PLC controller controls the test sample to be turned on and turned off according to a set frequency, the current signal detection unit collects current signals during a test sample on and off process and transmits the signals to the current recorder; and the current recorder records the received current signals.Compared with the prior art, the device and the method have the advantages that the sample current data can be accurately tested, no extra power consumption is generated and the like.

The present invention is directed to energy-efficient hibernation in indoor wireless localization systems. A tag passively associates with a detection point (DP) and establishes a reveille time. The tag will awaken at the reveille time and send or receive a beacon to or from its associated DP. If the tag is receiving a beacon, it will awaken, receive, phase-lock its clock based on when the beacon was expected and when it was actually received, and return to hibernation. The DP transmits a scattershot of beacons, one for every tag in the system. If the tag is sending a beacon, it will awaken, send its beacon, and return to hibernation. The DP will receive the beacon and adjust its own clock based on the delay between when the beacon was expected and when it was actually received. The tag will broadcast its location to the DP on a set interval.

A control circuit of a communication device includes: a periodic packet detection circuit, detecting a periodic packet of a data signal to generate a packet indication signal corresponding to the periodic packet; a frequency synthesis circuit, coupled to the periodic packet detection circuit, generating a working clock according to a reference clock; and a setting value generating circuit, coupled to the periodic packet detection circuit, generating a setting value according to a relationship between the frequencies of the working clock and the packet indication signal. The frequency synthesis circuit further adjusts the working clock according to the setting value to cause the frequency of the working clock to substantially be a predetermined multiple of the frequency of the packet indication signal.

The present invention is directed to energy-efficient hibernation in indoor wireless localization systems. A tag passively associates with a detection point (DP) and establishes a reveille time. The tag will awaken at the reveille time and send or receive a beacon to or from its associated DP. If the tag is receiving a beacon, it will awaken, receive, phase-lock its clock based on when the beacon was expected and when it was actually received, and return to hibernation. The DP transmits a scattershot of beacons, one for every tag in the system. If the tag is sending a beacon, it will awaken, send its beacon, and return to hibernation. The DP will receive the beacon and adjust its own clock based on the delay between when the beacon was expected and when it was actually received. The tag will broadcast its location to the DP on a set interval.

The invention relates to a television switch testing device. The television switch testing device includes a master control device and a relay circuit, wherein the master control device is used for executing a test program, and outputting an on-off electric signal according to the test program; the relay circuit is connected with the master control device to receive the on-off electric signal, and controls the contact switch of the contained relay to change the touch state according to the on-off electric signal; the contact switch of the relay is connected between an external power supply and a power supply of a television; the master control device can have an accurate clock, and can perform accurate time control in the test program according to the clock of the master control device; when the relay circuit is delayed, time correction can be controlled by modification of the program, so that the television switch testing device can realize accurate time control; and as the relay circuit is not a semiconductor device and is not limited by the power factor, the relay circuit can start the television through a greater current so as to reduce starting delay of the television and achieve the aim of quick testing.

The invention discloses a multifunctional landscape lightening controller. The controller comprises an MCU processing module, the MCU processing module is connected with a serial data caching / concurrence module, an SPI (Serial Peripheral Interface), a real-time clock module, a frame synchronization interface and a parameter setting interface, the serial data caching / concurrence module is connected with the SPI via an SPI serial data bus, and the data caching / concurrence module is also connected with multiple independent output modules. The invention also discloses a realization method of the multifunctional landscape lightening controller. The controller and realization method thereof are characterized by simple structure, low cost, high-speed data caching / concurrency, high light softness, multiple interfaces and wide application range.

The invention discloses an artificial intelligence inspection system based on an unmanned aerial vehicle. The system disclosed by the present invention comprises a battery power supply module, a master control module, a shooting module, a cruise module and a clock module; the battery power supply module provides power for shooting and flight; and the master control module firstly sets a flight mode and then controls the shooting module, the cruise module and the clock module to work; and the shooting module shoots an area needing inspection through using a camera so as to obtain an inspection picture. According to the artificial intelligence inspection system based on the unmanned aerial vehicle, a recording unit is used for recording the power supply starting time of each unit, an analysis prompting unit is used for analyzing the use frequency and the use starting time of each unit, and automatically starts a functional module with high use frequency; an abnormal power consumption condition is recorded through a power consumption recording unit, so that the unmanned aerial vehicle is convenient to overhaul, the automation and intelligence of the unmanned aerial vehicle are improved; and power consumption time is monitored, so that the inspection requirement is determined, and the inspection operation of the unmanned aerial vehicle is more intelligent.

The invention relates to a circuit structure and method for realizing clock recovery based on a USB device, wherein the circuit structure includes a built-in oscillator module for generating an oscillation signal; a digital control logic module; the digital control logic module includes: a USB clock recovery unit for The oscillating signal of the built-in oscillator is sampled and the clock is recovered; the frequency adjusting unit is used for adjusting the oscillating frequency of the built-in oscillator according to the comparison result of the USB signal and the oscillating signal of the built-in oscillator. The circuit structure and method for realizing clock recovery based on USB devices with this structure can generate accurate system clocks and have frequency tracking characteristics. By using digital control logic modules, the frequency of USB data transmission and the frequency of the built-in oscillator are compared. The frequency of the built-in oscillator is switched among three states of low speed, medium speed and high speed, which takes into account the accuracy and stability of the system, reduces the production cost, and has a wider range of applications.

The invention discloses a method for testing the accuracy of a CPU timer. The method comprises the following steps; step one, taking the timing of an accurate timing instrument as a reference benchmark and conducting a plurality times of measuring with different time ranges to the fist tested timer in the CPU; and step two, when the tested timer in the step one has an accurate timing, taking the timing of the fist tested timer as a benchmark and testing the accuracy of the rest timers in the CPU. The method does not need the help of special instruments, and can be tested at any time when the system is electrified; and the test process does not influence the operation of the system.

The invention discloses a multifunctional alarm clock system for classrooms, which relates to the field of electronic information technology. The system includes a central server and a plurality of terminals connected to it. Each terminal is respectively hung in a corresponding classroom. The self-organizing algorithm realizes the uniform correction of clock information. The terminal obtains the classroom schedule of each classroom through the central server. The terminal includes a power module and an embedded microprocessor connected to it, a network module, a storage module, an LCD display module and an audio module. Embedded microprocessor When the device is in each schedule time period, it displays the corresponding schedule information through the LCD display module and / or plays the corresponding audio schedule information through the audio module, and displays the time schedule information through the LCD display module during the course period or examination period to avoid distracting students Attention, the system is more practical through automated management and control terminals, which is convenient for students, teachers and supervisors to use at school.

The invention relates to a debugging system and debugging method for rail vehicle electronic equipment; the system comprises an FPGA which is used for the data interaction with to-be-debugged vehicle electronic equipment; a communication circuit which is connected with the FPGA and used for transmitting data in the FPGA; a power supply circuit which is used for supplying power to the FPGA and the communication circuit and managing the power supply; a waveform calculation module which is used for calculating and analyzing the data transmitted by the communication circuit and converting the data into waveforms; a waveform display control module which is used for zooming the converted waveform and selectively displaying the waveform; and a waveform storage module which is used for storing the converted waveform. The device is easy to operate, low in cost, efficient, reliable and good in portability.