90 results about "Clock correction" patented technology

The invention discloses a cross-device clock correction method supporting accurate synchronization of meters, and aims to improve the data time consistency among multiple meter devices and meet the requirements of high-precision electric power measurement and event analysis. The method comprises the following steps: acquiring a network time protocol timestamp and a first sampling time sequence in a reference meter, generating a clock reference signal, and broadcasting the clock reference signal to a corrected meter; comparing the corrected meter with a local second sampling time sequence, and calculating a clock skew coarse value vector; further performing wavelet decomposition on the offset coarse value, extracting to form a drift feature vector, fusing the drift feature vector with a historical template, and calculating a unified correction parameter set by using a Bayesian recursion method; and generating a correction pulse sequence carrying a delay residual compensation code based on the parameter set, sending the correction pulse sequence to a corrected meter, calling an interpolation compensation function to construct a piecewise polynomial drift compensation table, and finally realizing dynamic correction and cross-device accurate synchronization of a local real-time clock.

The invention discloses an LEO on-orbit real-time precision orbit and clock error determination method and system based on PPP-B2b enhancement, and belongs to the technical field of low-orbit satellite high-precision autonomous orbit determination and clock error estimation. According to the method, enhanced information broadcasted by Beidou No.3 B2b signals is used for correcting a BDS-3 / GPS satellite orbit and clock correction, under the support of the regional BDS-3 / GPS enhanced information, when a new BDS-3 / GPS tracking satellite exists, before measurement updating, the inter-epoch clock correction variable quantity obtained through calculation by using a carrier phase time difference method is used as two orbit determination filtering clock correction parameters for constraint, so that the measurement accuracy is improved. In-orbit real-time separation of receiver clock error and non-difference floating point ambiguity parameters is carried out; and finally, substituting an LEO precision orbit output by orbit determination filtering and a non-difference floating point ambiguity parameter into a phase observation equation to calculate the precision clock error of the BDS-3 / GPS receiver. The method is suitable for the situation that only regional GNSS enhancement information support exists, and the influence of orbital maneuver is small.

The invention provides a GNSS-based real-time positioning service stability improving method and system, and belongs to the field of satellite navigation and positioning services. According to the method, abnormal identification and elimination are carried out on monitoring receiver data with pseudo-range hopping and pseudo codes inconsistent with carriers, multiple receivers synchronous with a time reference are adopted to participate in clock correction calculation, the effectiveness of precise orbit determination and clock correction calculation is judged and identified, and meanwhile the consistency of calculation results is judged and repaired; estimating a satellite initial position vector and kinetic parameters, and forecasting a satellite orbit and a satellite clock error; and when the precise orbit determination solution and clock correction solution processing process is interrupted, the satellite orbit forecast result and the clock correction forecast result are output as a precise orbit and a clock correction, and the output robustness is guaranteed. According to the invention, the algorithm software of the system end is compensated, so that the calculation and storage burden of the user terminal is reduced, and the availability, continuity and stability of the real-time precise positioning service of the satellite navigation system are improved.

The invention provides a method and system for realizing synchronous playing of Bluetooth headset devices, and the method comprises the steps: building a synchronous node group comprising a plurality of Bluetooth headset devices, and determining at least two auxiliary nodes; constructing a multi-source clock synchronization network between the main control equipment and each earphone, broadcasting a reference timestamp and activating a direct connection channel between the earphones to form distributed clock correction; acquiring transmission delay and processing capability parameters of each earphone, and allocating a unique time synchronization identifier according to the transmission delay and the processing capability parameters; the main control equipment sends a data packet containing the audio data and a preset playing timestamp; and after each earphone receives the audio data, calculating a playing moment according to the timestamp and the identifier, and synchronously playing the audio data at the moment. Through the scheme of the invention, high-precision audio synchronous playing between Bluetooth headset devices can be realized, the problem of audio asynchronization caused by transmission delay difference is effectively eliminated, and the single-point failure risk under the master-slave topology is reduced.

The invention discloses an audio and video acquisition synchronous management method, and relates to the technical field of data synchronization. The method is executed by main control equipment and comprises the following steps: S1, acquiring a satellite time reference through a dual-mode time service module; s2, based on the pulse signal of the temperature compensated crystal oscillator, a master clock signal is generated according to a formula Tmaster = TGPS + alpha delta T + beta (delta f / f0), TGPS is a satellite time reference, alpha is a temperature compensation coefficient and ranges from 0.2 to 0.8, and beta is a frequency drift correction factor; s3, establishing an inter-device time synchronization communication link through an IEEE 1588PTP protocol, and broadcasting a synchronization pulse by the main control device; s4, the data buffer area is adjusted in real time according to the dynamic buffer control formula D (t) = D0 + k1 * (delta t) 2 + k2 * d delta t / dt, k1 = 0.15 ms-2, and k2 = 2.5 ms2 / s; s5, when the network time delay gt is detected; and at 150ms, switching to a local clock compensation mode, and triggering the extended Kalman filter to re-correct the clock parameters. According to the invention, a hybrid synchronization architecture with local clock correction capability is constructed, and self-adaptive time difference compensation without network dependence is realized.

The invention provides an inter-station time synchronization constrained VLBI world time measurement method, which comprises the following steps: determining at least two observation stations for observing a radio power source, and carrying out precise clock synchronization to obtain a precise inter-station clock difference; using the at least two observation stations to simultaneously observe the same radio power source to obtain observation time delays from the same radio power source to the at least two observation stations; separating the clock error in the observation time delay by using the precise inter-station clock error to obtain the observation time delay of the separated clock error; and removing ionosphere time delay, troposphere time delay and equipment time delay in the observation time delay of the separated clock error to obtain final observation time delay, and resolving a residual error between the final observation time delay and theoretical time delay to obtain world time. According to the invention, precise time synchronization between observation stations is carried out in advance, and inter-station errors are effectively separated. The problem that VLBI observation time delay and inter-station clock correction are difficult to separate is solved, the UT1 resolving precision can be effectively improved, and the requirement for high-precision UT1 in the fields of deep space exploration and the like is expected to be met.

The invention provides a multi-epoch observed quantity combined aircraft positioning method under an asynchronous network, and the method can achieve the positioning of a maneuvering aircraft under the asynchronous network. The method comprises the following steps: firstly, acquiring observed quantities of an epoch 1-T aircraft and M non-GNSS satellites to form a first sequential observed quantity tau; constructing a motion offset model and a clock model between epochs of the aircraft; substituting the motion offset model and the clock model into epoch i observed quantity expression between the aircraft and the satellite to obtain a mapping relation between the aircraft parameter and the clock parameter of the epoch 1 and the epoch i observed quantity; the aircraft parameters of the epoch 1 and the relative clock error and clock drift of the aircraft and each satellite are used as to-be-estimated parameters; determining a second sequential observed quantity tau'according to the to-be-estimated parameters and the mapping relation; constructing a positioning objective function for searching a to-be-estimated parameter which enables an error between tau'and tau to be minimum; and based on the positioning objective function, jointly estimating aircraft parameters and relative clock correction and clock drift of the aircraft and each satellite, and completing aircraft positioning calculation.

The invention relates to a satellite short-term clock error forecasting method fusing time sequence decomposition and deep learning, and belongs to the technical field of satellite clock error forecasting. The method comprises the steps of performing primary difference processing on a satellite historical clock error sequence, screening out abnormal values existing in data according to a Raida criterion, performing time sequence decomposition on clock error primary difference data, firstly, decomposing the clock error primary difference sequence by adopting an adaptive noise complete set empirical mode decomposition algorithm to obtain a plurality of mode components, and performing time sequence decomposition on the plurality of mode components; a permutation entropy algorithm is introduced to sort modal components, and a t check algorithm is used to classify random items and periodic items of the components and reconstruct the components into trend items, periodic items and random items. And inputting the reconstruction item into a Transform model in a channel independent mode for training, and obtaining the clock error required to be forecasted after inverse primary difference processing and superposition of component prediction results. According to the method, the precision and the stability of satellite short-term clock correction forecasting are improved, and meanwhile, the interpretability of a forecasting result is also improved.

The embodiment of the invention discloses a low-orbit navigation satellite clock correction calculation method and device, electronic equipment and a storage medium, and the method comprises the steps: carrying out the ionosphere-free combined precise orbit determination of observation data received by an LEO through the satellite orbit parameters and clock correction products of a medium-high-orbit GNSS satellite, and obtaining the satellite orbit parameters of the LEO and the clock correction of a signal receiving end; based on the double-frequency mixed observation data, jointly resolving the signal transmitting end clock error of the LEO in the ground visible segmental arc; mathematical models are established for the signal receiving end clock error of the LEO and the signal transmitting end clock error of the LEO in the ground visible arc section respectively, and the difference of the clock error models is extracted; and according to the difference of the clock difference model, converting the clock difference of the signal receiving end of the LEO into the clock difference of the full-arc signal transmitting end of the LEO.

The invention provides a precision compensation method and device for a real-time clock of an electric energy meter. The method comprises the following steps: acquiring the current environment temperature of a to-be-measured electric energy meter; when it is determined that the current environment temperature exceeds a preset normal temperature interval, on the basis of a plurality of preset temperature correction points and compensation coefficients corresponding to the preset temperature correction points, real-time clock correction is carried out on the to-be-measured electric energy meter at the preset temperature correction points in sequence according to the temperature from low to high; wherein the compensation coefficient is obtained by performing polynomial fitting on the original temperature value reading of the sensor corresponding to the preset temperature correction point and a reference temperature value. According to the invention, error transmission during precision compensation is avoided, and the real-time clock precision of the electric energy meter is improved.

The invention discloses an integrity monitoring method for real-time filtering timing and orbit determination of a low earth orbit satellite. The method comprises the following steps: acquiring a complete upper bound covariance matrix of a low earth orbit satellite system observation model of a current epoch; calculating an upper bound form covariance matrix of unknown parameters in the low earth orbit satellite system observation model according to the complete upper bound covariance matrix; the unknown parameters comprise clock correction and orbit parameters; obtaining a first upper bound form standard deviation of the clock error and a second upper bound form standard deviation of the orbital parameter according to corresponding elements of the clock error and the orbital parameter in the upper bound form covariance matrix; determining a first impact on the clock error and a second impact on the orbital parameter from the deviation transmissions of the plurality of epochs; obtaining a first protection level according to the first upper bound form standard deviation and the first influence, and obtaining a second protection level according to the second upper bound form standard deviation and the second influence; and integrity monitoring of low-orbit satellite real-time filtering timing and orbit determination is carried out based on the first protection level and the second protection level, so that the accuracy of integrity monitoring is improved.

The invention discloses a clock correction prediction method based on multi-scale feature extraction and dynamic attention fusion. The used prediction model comprises a multi-scale feature extraction layer, a double-branch time sequence modeling layer and a dynamic attention fusion layer; the multi-scale feature extraction layer extracts low-frequency features, transition features and high-frequency features of the input sequence, further generates three different features, and splices all the different features with the low-frequency features, the transition features and the high-frequency features in a channel dimension to obtain multi-scale fusion features; the multi-scale fusion features sequentially pass through channel attention and space attention, then pass through an adaptive gating network to generate two dynamic weight coefficients, and are subjected to weighted fusion to obtain input features of a high-frequency branch and a low-frequency branch; the double-branch time sequence modeling layer generates short-term fluctuation features and long-term trend features, and the dynamic attention fusion layer generates long and short-term fusion features. According to the method, the analysis capability of the model on the complex sudden change mode in the clock error data is remarkably improved, and the prediction precision is further remarkably improved.

The invention discloses a double-satellite-based real-time precise single-point positioning system combined positioning method, which synchronously receives and decodes real-time satellite orbits, clock correction and code deviation correction of PPP-B2b and HAS, and realizes real-time precise single-point positioning of a user side combined with GPS + BDS-3 + Galileo three systems through strategies such as orbital combination and clock correction optimization and switching. In the aspect of orbit correction, two satellite-based PPP orbit product references are unified through a Helmert similarity transformation model, and a combined orbit product is generated by adopting a weight adjustment strategy combining a priori fixed weight and a posterior fixed weight. In the aspect of the clock correction number, aiming at the problem that different satellite-based correction numbers are inconsistent in time reference, clock correction type consistency detection between a front epoch and a rear epoch is carried out, and ambiguity parameters of corresponding satellites are reset in time.

The invention discloses a space-time synchronization method for a space-based distributed satellite array. The method comprises the following steps: acquiring an initial clock error between each satellite in the space-based distributed satellite array and a reference point, and observation position and time information containing a space error; according to the initial clock difference between the satellites and the reference point, measuring the time difference and the observation time when one satellite transmits signals to the other satellite in any two satellites; according to the observation positions, the time differences and the observation time of all satellites and a preset iteration initial spatial position and a preset iteration initial clock correction, searching a real spatial position of each satellite and a clock correction between the real spatial position and the reference point when the inter-satellite total error function converges to a minimum value based on a backtracking line search gradient descent optimization method; and adjusting the position of the satellite according to the real spatial position of the satellite and the clock difference between the satellite and the reference point so as to realize spatial synchronization.

The invention belongs to the technical field of satellites. The invention provides a simulated in-orbit test method and system for low-orbit satellite time-frequency equipment. According to the embodiment of the invention, a reference atomic clock provides a reference basis for a GNSS navigation signal simulator, a time interval counter and a phase noise analyzer; the GNSS navigation signal simulator provides a Beidou / GNSS analog signal and an SSR (Simple Sequence Repeat) correction number for the satellite time frequency equipment; the satellite time frequency device completes real-time precise orbit determination and clock correction calculation of the low-orbit satellite by using the received Beidou / GNSS analog signal and the SSR correction number, and controls and regulates a built-in local atomic clock according to a calculated clock correction sequence; and respectively carrying out time precision and frequency stability test and analysis on the second 1PPS signal and the second 10MHz signal through a time interval counter and a phase noise analyzer. The low-orbit satellite in-orbit test can be simulated in the initial stage, and real-time calculation of in-orbit satellite test data can be realized.

The application provides a clock correction method, system, medium and product of a storage logging instrument, relates to the technical field of clock correction, and the method comprises the following steps: when a starting instruction is received, reading an accelerometer file path in a target configuration file, obtaining acceleration data and corresponding local time stamps of a plurality of storage logging instruments; displaying acceleration curves of the plurality of storage logging instruments on a visual interface, determining a reference storage logging instrument in response to a reference selection operation of a user, determining a starting baseline and an ending baseline in response to a baseline setting operation of the user on the acceleration curve of the reference storage logging instrument, and calibrating a starting moving point corresponding to the starting baseline and an ending moving point corresponding to the ending baseline in response to a moving point calibration operation of the user on the acceleration curve of the other storage logging instrument; and performing time synchronization correction on the local time stamps of the other storage logging instruments according to the starting baseline, the ending baseline, the starting moving point and the ending moving point.

The invention discloses a joint correction method and system for GNSS (Global Navigation Satellite System) non-structural deformation and a storage medium. According to the method, GNSS pseudo-range and carrier phase observation data and precise products such as a precise orbit and clock correction are obtained, a three-component displacement time sequence caused by a non-tidal atmospheric load, a non-tidal ocean load and a land hydrological load and a temperature-driven thermoelastic displacement time sequence are constructed, and the three-component displacement time sequence and the temperature-driven thermoelastic displacement time sequence are unified to a reference frame and a time system consistent with GNSS calculation. After interpolating the non-structural displacement vector to an observation epoch according to time, converting the non-structural displacement vector to a geocentric rectangular coordinate system from a site local coordinate system ENU, and projecting the non-structural displacement vector to a sight line direction from a satellite to an observation station reference point to form an equivalent geometric distance correction item; the correction terms are respectively applied to pseudo-range observation and carrier phase equivalent meter domain observation in the form of the same domain as observation, and then GNSS daily arc precise calculation is performed to output a coordinate time sequence, and preferably, the method can be used for a precise single-point positioning integer ambiguity fixing technology.

In one embodiment, a peripheral device includes an oscillator, a counter to be driven by the oscillator and provide a peripheral device counter value, and processing circuitry to receive a host device counter value from a host device, read host device clock translation parameters from a host memory of the host device, the host device clock translation parameters providing translation between the host device counter value and a host device clock time, read peripheral device clock translation parameters providing a translation between the peripheral device counter value and a peripheral device clock time, read the peripheral device counter value, compute a clock correction as a function of a difference between the host device clock time and the peripheral clock time, based on the host device and peripheral device counter values and clock translation parameters, and correct the host device or peripheral device clock translation parameters based on the clock correction.

The invention provides a GNSS instantaneous speed measurement method and device based on least square filtering estimation, and the method comprises the steps: constructing an observation equation and a state equation needed by an estimator, the observation equation comprises a pseudo-range and carrier phase observation equation, and the speed and acceleration parameters of a carrier are added; according to the state equation, carrier motion is modeled into uniformly accelerated motion, acceleration, receiver clock correction and zenith troposphere wet delay are respectively set as a random walk process, and ambiguity is set as a random constant process; performing dimension expansion on the state vector dimension of the normal equation, and eliminating the state component of the previous epoch through a parameter elimination method to realize state prediction; and superposing a prediction result with a normal equation formed by the current epoch observation equation, and carrying out measurement updating to obtain an instantaneous speed estimation value of the current epoch. According to the invention, single-station real-time speed measurement is realized based on broadcast ephemeris, and compared with traditional TDCP speed measurement (average speed) and Doppler speed measurement (large noise), the method has higher precision and reaches centimeter level in the horizontal direction.

The present disclosure relates to a method and a device for determining a reference time in a vehicle by using a plurality of time sources. The device according to an embodiment of the present disclosure receives time data from a plurality of time sources, verifies consistency and reliability of the received time data, and determines a reference time according to the result of the verification. The determined reference time is transmitted to each ECU in the vehicle and utilized for time synchronization, timestamp assignment, or clock correction, so that the reliability and accuracy of functions or services of the vehicle system can be improved.

This invention proposes a measurement system, method, apparatus, and medium for a delay-locked loop (PLL) within a chip. The system includes: a clock correction unit, with the output of the PLL communicatively connected to it; the clock correction unit includes a period calibration delay unit, a fine adjustment delay unit, a calibration control terminal, and an adjustment control terminal; a clock comparison unit, with the output of the clock correction unit communicatively connected to its input; a counting unit, with its input communicatively connected to both the output of the clock comparison unit and the clock correction unit; and a data processing unit, with its input communicatively connected to the counting unit. The data processing unit outputs the period jitter measurement result and the phase linearity measurement result of the clock signal under test based on the count value. According to the technical solution of this invention, the measurement results can reflect the true clock signal under test, improving the efficiency of chip circuit structure adjustment.

The invention discloses an aviation obstruction beacon synchronous control method and system in a wind power scene, and the method comprises the steps: dividing aviation obstruction beacons into main aviation obstruction beacons and auxiliary aviation obstruction beacons based on the coverage range of the aviation obstruction beacons, and connecting the aviation obstruction beacons with a main control module through employing a double-link communication architecture; determining communication time among the main control module, the main aviation obstruction beacon and the auxiliary aviation obstruction beacon based on the clock correction frame, and constructing a path matrix; and monitoring communication connection of the main aviation obstruction beacon and synchronization conditions of the main and auxiliary aviation obstruction beacons based on the path matrix, and realizing dormancy scheduling of the aviation obstruction beacons. According to the invention, stable connection of the aviation obstruction beacon is realized by adopting a double-link communication architecture; the construction of the path matrix is more beneficial to management of the communication time of the aviation obstruction beacon, and faults can be found as soon as possible; the main and auxiliary aviation obstruction lights are managed in a classified manner to prolong the stable operation time of the system and ensure the synchronous execution of instructions.

The invention relates to the technical field of internal clock correction of an intelligent fusion terminal, in particular to a self-adaptive clock synchronization method for the intelligent fusion terminal, which comprises the following steps: S1, acquiring a plurality of clock synchronization sources and corresponding quality characteristic parameters thereof; s2, calculating a corresponding comprehensive quality score, and selecting a clock synchronization source with the highest comprehensive quality score as a main clock source; s3, calculating the time deviation between the internal clock of the intelligent fusion terminal and the main clock source, and if the time deviation exceeds a deviation threshold value, correcting the internal clock of the intelligent fusion terminal through the main clock source; s4, calculating a clock drift rate between a current corrected value and a previous corrected value of the internal clock of the intelligent fusion terminal, if the clock drift rate exceeds a drift rate threshold value, triggering main clock source switching, and returning to the step S2; and S5, periodically executing the step S2, and dynamically updating the main clock source. According to the invention, the flexibility, reliability and stability of clock synchronization of the intelligent fusion terminal can be improved.

This application relates to the field of clock correction technology, and provides a clock correction method, apparatus, electronic device, and storage medium. The method receives a first synchronization message sent by a master clock node in the current scheduling cycle. If the first synchronization message indicates that a slave clock node is the time synchronization target, the method records the synchronization message reception time of the first synchronization message. It then sends a delay request message to the master clock node and records the delayed message transmission time of the delay request message. The method receives a response message returned by the master clock node in response to the delay request message, the response message carrying the delayed message reception time of the master clock node. Finally, it receives a second synchronization message sent by the master clock node in the next scheduling cycle, and parses the synchronization message transmission time of the master clock node sending the first synchronization message from the second synchronization message. Based on the four acquired times, it calculates the clock deviation between the slave clock node and the master clock node, and performs time correction on the slave clock node according to the clock deviation.

This provides a real-time kinematic (RTK) solution for mobile devices with multi-constellation, multi-frequency (MCMF) capabilities, where a single base station may have a baseline much farther than that of a traditional base station. To achieve this, the embodiment addresses atmospheric effect differences between the rover and the base station when the GNSS positioning of the mobile device (rover) is fixed, thereby allowing the determination of individual tropospheric delay errors at the base station. The embodiment can utilize additional satellite measurements that are not available without RTK correction, and can also use orbital clock correction for these additional satellite measurements.

The invention discloses an indoor positioning method, device, equipment, medium and product, and the method comprises the steps: packaging an RTCM message sent by a CORS base station platform into a positioning system information block through an LMF network element, and transmitting the positioning system information block to an indoor distribution system, thereby enabling a terminal to carry out the positioning through the positioning system information block broadcasted by the indoor distribution system, and enabling the positioning efficiency to be improved. Wherein the RTCM telegraph text comprises satellite ephemeris, orbit correction, clock correction and RTK differential data, so that the terminal can perform high-precision indoor positioning by combining the satellite ephemeris, the orbit correction, the clock correction and the RTK differential data, and the indoor positioning precision is improved.

The application relates to the technical field of navigation positioning, and discloses a prior HURA value accuracy determination method based on PPP-RTK, which is characterized in that: long-term PPP-RTK orbit and clock correction data are used to obtain post HURA; the prior HURA value is compared with the post HURA value, the accuracy of the prior HURA value is determined, and the prior HURA value is corrected. The application further discloses a prior HURA value accuracy determination system based on PPP-RTK. The accuracy of the prior HURA value can be effectively determined, and the real-time HURA value broadcast by PPP-RTK can be adjusted.

The application discloses a terminal positioning method and device, equipment and storage medium, and specifically discloses the following: receiving a ranging code decoding key issued by a core network; receiving encrypted ranging codes broadcast by at least four base stations; using the ranging code decoding key to decrypt the received encrypted ranging codes to obtain original ranging codes corresponding to the base stations; based on the original ranging codes, performing code phase alignment processing on the original ranging codes and copied ranging codes with the same structure as the original ranging codes to obtain the propagation time of signals of the encrypted ranging codes from the base stations to a terminal, and calculating the pseudo distances between the terminal and each base station according to the propagation time; obtaining high-precision geographic positions and clock correction information of the at least four base stations, and based on the pseudo distances corresponding to the at least four base stations respectively, the high-precision geographic positions and the clock correction information, constructing an equation group with the three-dimensional coordinates and clock bias of the terminal as unknowns, and determining the position coordinates of the terminal by solving the equation group.

This invention discloses a real-time dynamic relative positioning method, system, and device based on state domain correction information. The method involves: a server receiving real-time GNSS observation data streams from the entire network of reference stations and real-time precise orbit clock correction streams to perform real-time precise single-point positioning calculations, and broadcasting network-wide floating-point ambiguity information; then performing real-time phase deviation estimation and broadcasting it; further, combining the network-wide reference station observation data streams and real-time precise orbit clock errors to perform real-time precise single-point positioning fixed-solution calculations, and broadcasting network-wide atmospheric delay information; performing atmospheric modeling and broadcasting the model information; and a user terminal receiving the precise orbit clock correction information, phase deviation information, and model information broadcast by the server in real-time, generating virtual observation values ​​at its approximate coordinates, and performing real-time dynamic relative positioning calculations. This invention can significantly reduce the algorithm complexity of current precise positioning servers and is compatible with existing relative positioning user terminals while ensuring one-way communication and privacy protection.

The application relates to a clock calibration device, a method and a tire pressure monitoring system. The clock calibration device is applied to a tire pressure sensing device. A temperature reading module reads the working temperature of the tire pressure sensing device when the tire pressure sensing device is in a wake-up reset state. Then, a query module queries clock buffer data corresponding to the working temperature. A correction determination module determines whether the clock buffer data is consistent with initial data and generates a determination result. A correction module obtains clock correction data according to the determination result. Finally, a clock calibration module modulates the clock signal of the tire pressure sensing device according to the clock correction data, so that the frequency of the modulated clock signal reaches a target frequency. In this way, the working period offset of the tire pressure sensing device caused by temperature change can be dynamically corrected during the working process, thereby prolonging the service life of the tire pressure sensing device and finally improving the reliability of the monitoring system.