695 results about "Crystal oscillator" patented technology

The invention discloses a full-localization ultra-high-speed multi-channel ADC (Analog to Digital Converter) acquisition and processing platform, and relates to the technical field of signal processing. The platform comprises a high-stability clock distribution calibration module, a synchronous acquisition and pulse injection module, a pulse detection and integer deviation module, a coarse-grained translation alignment module, a sub-sampling phase extraction module, a fractional delay interpolation alignment module, a hierarchical storage and flow control module and a high-speed interface synchronous output module. Multi-channel sampling clock synchronization is realized through FPGA dynamic phase adjustment; performing coarse-grained translation by injecting calibration pulses to detect integer deviation, extracting a sub-sampling phase difference, and adopting fractional delay filtering to realize sub-sampling precision alignment; hierarchical storage and intelligent flow control are carried out according to priorities, and synchronous data flow is output through a domestic high-speed interface; through a full-flow domestic chip and a synchronous correction technology, sub-sampling precision alignment and hierarchical flow control output of a multi-channel ADC at an ultrahigh sampling rate are realized.

The invention discloses a crystal oscillator circuit fault classification technology based on a multi-source information fusion network, and belongs to the technical field of analog circuit fault diagnosis. Firstly, a multi-source data set of different measurement points of the crystal oscillator circuit is acquired; carrying out conversion from a time domain to a frequency domain on the data set by utilizing fast Fourier transform; extracting data fault features by using a convolutional neural network, and performing a trust distribution function under each piece of source data by using a softmax classifier; fusing different trust distribution functions under the multi-source data by adopting a D-S evidence theory to obtain a final diagnosis result and diagnosis probability output, and calculating cross entropy loss; and finally, training model parameters through back propagation to obtain a final diagnosis model. According to the method, the time-frequency transformation algorithm, the deep neural network algorithm and the information fusion algorithm are combined, a multi-source information fusion network is constructed, the defects of an existing diagnosis model in crystal oscillator circuit fault classification are overcome, and the accuracy and stability of crystal oscillator circuit fault diagnosis are remarkably improved.

The invention relates to the technical field of cable fault positioning, in particular to a cable fault accurate positioning method based on multi-channel synchronous acquisition, which comprises the following steps: S1, constructing a multi-channel adaptive acquisition system which comprises a main controller, a multi-channel acquisition module, a synchronous control module and a data transmission module; s2, multi-channel data synchronous acquisition is carried out through the synchronous control module, wherein the multi-channel data comprises impedance data, temperature data, partial discharge signals and insulation resistance data; during use, through a multi-channel adaptive acquisition design, monitoring channels can be flexibly selected according to cable materials, operation years and environmental conditions, different aging fault characteristics are comprehensively covered, the fault omission ratio and the false alarm rate are reduced, different types of low-voltage cables are adapted, a synchronous scheme of constant-temperature crystal oscillator and hardware triggering is adopted, and the reliability of the system is improved. The method does not need to depend on a GPS / PTP time service module, is favorable for saving cost input, and eliminates environmental interference and single parameter false triggering.

The invention discloses a multi-protocol compatible hydropower station field bus photoelectric signal synchronous acquisition device and method, and relates to the technical field of industrial bus testing, the device comprises a core control layer, a signal conditioning layer, a photoelectric interface layer, a clock synchronization layer, a power management layer and a data storage and transmission layer; the core control layer adopts a dual-core framework of a domestic Loongson 2K0300 main control unit and a domestic FPGA (Field Programmable Gate Array) time sequence control unit; the clock synchronization layer adopts a two-stage synchronization mechanism of'local crystal oscillator time sequence control + NTP network clock calibration '; and the signal conditioning layer is integrated with a multi-protocol self-adaptive conditioning module and an industrial-grade anti-interference module. The method comprises the steps of clock initialization and calibration, parameter configuration, photoelectric signal parallel acquisition and time sequence synchronization, and data preprocessing and transmission, so that synchronous acquisition of six types of bus protocol photoelectric signals is realized. The system has the advantages of multi-protocol compatibility, autonomous controllability, good portability and the like, and provides reliable data support for bus communication quality evaluation and fault diagnosis.

The invention discloses a system reference clock frequency accuracy automatic calibration circuit and a calibration method thereof, and belongs to the technical field of frequency sources, the calibration circuit comprises a first crystal oscillator, a first power divider, a second power divider, a second crystal oscillator, an analog switch, a radio frequency switch, a detector, a comparator, an FPGA controller, a digital analog converter, an operational amplifier and a temperature sensor. When an external high-precision reference clock is accessed, the FPGA controller automatically switches a frequency measurement reference, performs high-precision frequency measurement on a 100MHz signal output by the first crystal oscillator, and judges whether calibration is needed or not according to frequency offset; if calibration is needed, the output voltage of the digital-to-analog converter is adjusted, the Vc end of the first crystal oscillator is controlled after operational amplification, and frequency closed-loop adjustment is achieved. According to the method, the crystal oscillator does not need to be disassembled, calibration is rapidly completed on site, and system availability and long-term frequency stability are remarkably improved.

The invention discloses a crystal oscillator taming system based on Kalman filtering and adaptive PID, and relates to the technical field of time-frequency equipment. Comprising a crystal oscillator time frequency module used for generating a local time frequency signal, a reference module used for receiving an external reference time frequency signal, an error measurement module used for measuring the phase deviation between the local time frequency signal and the reference time frequency signal, and a Kalman filtering estimation module used for performing Kalman filtering estimation based on the phase deviation. The Kalman filtering module is used for outputting phase deviation estimation and covariance estimation and adaptively adjusting PID parameters according to the phase deviation estimation, the position deviation estimation and the covariance estimation; the control feedback module is used for superposing the voltage-controlled voltage adjustment quantity to the crystal oscillator time frequency module to adjust the output frequency of the crystal oscillator; according to the method, the crystal oscillator taming parameters are dynamically adjusted through Kalman filtering in combination with self-adaptive PID, high-precision and robust taming of the crystal oscillator is achieved, and the long-term frequency stability and the time synchronization precision of the crystal oscillator are improved.

A method for measuring the dynamic frequency of a high-precision crystal oscillator comprises the following steps: 1) setting a target frequency on an upper computer, communicating with a single chip microcomputer in a lower computer through a serial port, and sending the target frequency to the lower computer; and 2) acquiring a signal of the tested wafer in the alternating electric field. And 3) making a frequency lookup table. And 4) calibrating the signal of the tested wafer. And 5) carrying out AD conversion on the calibrated voltage signal, outputting a code of the calibrated voltage signal to a single-chip microcomputer, finding out a frequency corresponding to the code, sending the frequency to an upper computer through a serial port, and displaying the measured frequency of the quartz wafer. According to the invention, high-precision and low-cost frequency measurement can be realized.

The invention discloses a high-precision clock taming and signal shaping method and device for a satellite timing system. The method comprises the following steps of: counting and measuring a reference pulse per second received in real time by using a local high-frequency clock signal output by a local voltage-controlled crystal oscillator to obtain a phase counting deviation sequence of the local high-frequency clock signal relative to the reference pulse per second; inputting the phase counting deviation sequence into the frequency control closed-loop model, analyzing the historical state characteristics of the phase counting deviation sequence, and calculating a frequency adjustment instruction for the local voltage-controlled crystal oscillator; the frequency adjusting instruction is converted into an analog voltage signal, a local voltage-controlled crystal oscillator is driven to adjust the output frequency, and a tamed local high-frequency clock signal is obtained; the tamed local high frequency clock signal is utilized to drive phase warping logic to generate a local pulse per second synchronized with the reference pulse per second. According to the invention, through adaptive closed-loop control and phase regulation, precise taming of crystal oscillator frequency and high-precision shaping of output signals are realized.

The invention discloses a low-cost precise time keeping method, system and device based on a gating circulation unit, and relates to the technical field of power grid measurement. The method is executed when the synchronous phasor measurement device cannot receive external signals, and comprises the following steps: monitoring operation parameters which influence the frequency stability of an internal crystal oscillator of the phasor measurement unit in real time; calculating a current frequency error of the crystal oscillator in real time by using a crystal oscillator frequency drift prediction model based on a gated cycle unit network based on the operation parameters; generating a time correction amount according to the current frequency error; and applying the time correction to a local clock of the phasor measurement unit to compensate the frequency drift of the crystal oscillator so as to realize accurate time keeping. According to the invention, through accurate prediction of crystal oscillator errors and lightweight software compensation, the synchronous phasor measurement device adopting a low-cost crystal oscillator can also realize long-time high-precision time keeping, the hardware cost is obviously reduced, and the reliability of power grid monitoring during the Beidou / GPS lock losing period is improved.

The invention relates to a PPS (pulse per second) signal synchronization FPGA (field programmable gate array) timer, which takes a full-localization Fudan micro JFM7K325T chip as a core, comprises a time synchronization unit, a main control unit and a multi-interface unit, and is matched with a real-time clock chip. Wherein the time synchronization unit comprises a synchronization processing module, a time information module and the like, a PPS signal and TOD time information are integrated to generate a PPS + TOD + millisecond timestamp, a 25MHz constant-temperature crystal oscillator is divided into a 250MHz clock in a frequency division manner, and the time sequence precision is guaranteed; through a dual mechanism of satellite master synchronization and RTC bottom compensation, a new timestamp is rapidly combined when PPS is interrupted, and the error is controlled within 4ns; the register array stores timestamps, configuration parameters and running states in a classified mode and supports extension of multiple interfaces such as 422 and IIC and event log power-down storage. According to the invention, high-precision time synchronization, stable operation and full-link localization autonomous controllability are realized, and multi-scene multi-user board card synchronization requirements are met.

The invention provides a control instruction time sequence synchronization method and device of a multi-node industrial control system. The control instruction time sequence synchronization method comprises the following steps: a control node calculates an initial time offset through a calibration frame, loops back a test frame to measure link transmission delay, and compensates a local clock of an execution node to realize initial alignment; periodically broadcasting a reference clock, calculating an accumulated drift amount in real time by an execution node, and adjusting a local clock frequency when the accumulated drift amount exceeds a threshold value; sending a control instruction based on a synchronization period starting moment, synchronizing a trigger signal to enable an execution node to sample data at the same time, and reading the data by a period ending boundary. According to the control instruction time sequence synchronization method, the initial synchronization precision is + / -10ns, the accumulated drift distance is controlled within + / -10ns, the total time sequence deviation is smaller than 100ns, system errors are effectively eliminated, the problem of crystal oscillator deviation is solved, the method can be compatible with an industrial bus, the hardware cost is reduced, and the multi-axis cooperative control precision and stability are greatly improved.

Piezoelectric materials, particularly ones with high quality factor used for mechanical antenna implementations, are sensitive to environmental conditions including temperature swings, humidity, vibration. Under the varying environmental conditions, the resonant frequency of the piezoelectric antenna can drift, and this results in the dampened piezoelectric radiator performance due to the mismatch between RF source' excitation frequency and piezoelectric antenna's resonant frequency. The frequency drift can be detrimental to the operation of the communication system that involves piezoelectric transmitter / receiver as a system component. In embodiments, the piezoelectric antennas may be integrated into a crystal oscillator to lock a drive frequency of the piezoelectric antennas to a resonant frequency of the piezoelectric antennas.

The invention belongs to the field of integrated circuits, and particularly relates to a high-Q-value quick-start crystal oscillator based on an MLP neural network. A neural network is used for replacing a complex phase synchronization hardware circuit in a traditional energy injection technology. Firstly, working state parameters of a crystal oscillator are collected in real time through a state collection module; then mapping the received real-time digital information into a corresponding output instruction through a trained MLP neural network model, and further controlling an energy injection module to inject an energy signal in the same phase as crystal oscillation; along with gradual increase of the oscillation amplitude, when the oscillation amplitude reaches a threshold value, the MLP neural network control model outputs an injection stopping instruction, switches the switch state, and submits the instruction to the negative resistance oscillation circuit to maintain steady-state oscillation and output a stable oscillation signal. According to the invention, the low complexity and high robustness are taken into account while quick starting is realized, and a solution is provided for the application of the high-Q-value crystal oscillator in a low-delay and low-power-consumption scene.

The invention discloses a double-frequency constant-temperature crystal oscillator and a manufacturing method thereof, and relates to the technical field of crystal oscillators, and the double-frequency constant-temperature crystal oscillator comprises a ceramic base and a ceramic bottom plate which are integrally formed by adopting an LTCC (Low Temperature Co-Fired Ceramic) process; the high-frequency quartz crystal and the low-frequency quartz crystal are respectively arranged in independent closed cavities, and unified heating and accurate temperature control are realized through the high-heat-conduction diamond copper substrate, the metalized heat conduction holes and the partitioned temperature sensing chips; the two paths of signals are output through independent interconnection paths, and the crosstalk is lower than-50dBm. According to the invention, the dual-frequency high-stability low-noise output is realized under the similar volume, and the requirements of a flight control system on a high-integration-level and high-reliability frequency source are met.

The invention provides a positioning time service base station, a positioning time service method, a storage medium and a program product, relates to the field of communication, and can solve the problems that an existing positioning time service scheme is high in construction, operation and maintenance cost and has a service blind area. The base station comprises a GNSS receiver chip, a crystal oscillator, a data acquisition and processing unit and a radio frequency unit, the GNSS receiver chip is used for receiving more than two frequency point signals at the same time; wherein the frequency point signal comes from a satellite navigation system; the crystal oscillator is used for providing time reference; the data acquisition and processing unit is used for receiving observation data of the satellite navigation system; performing differential calculation at least based on the observation data to obtain differential correction data; wherein the differential correction data is used for the terminal equipment to carry out positioning correction or time service correction; a radio frequency unit; and the radio frequency unit is used for sending the differential correction data to terminal equipment located in a service area of the positioning time service base station.

This invention discloses a ranging method and system based on a network data link, relating to the field of wireless communication ranging technology. The method includes the following steps: synchronizing the clocks of all nodes in the network and aligning the transmit and receive timings between nodes; each node in the network transmitting a synchronization signal within its allocated fixed transmission time slot according to a preset fixed frame structure; the receiving node calculating the theoretical time at which it receives the synchronization signal when the signal propagation delay is zero based on the synchronization clock and the preset fixed frame structure, and recording the actual time of receiving the synchronization signal; and the receiving node calculating the distance between itself and the node that transmitted the synchronization signal based on the time difference between the theoretical and actual times. This invention effectively eliminates ranging errors caused by crystal oscillator clock deviations between nodes, requires no external satellite signals or two-way signaling interaction, and achieves ranging by multiplexing the synchronization signal. It significantly reduces hardware costs while achieving high-precision, low-latency, and environmentally adaptable inter-node ranging.

The invention discloses a crystal oscillator-free Bluetooth chip communication method and device based on frequency offset detection, and the method comprises the steps: searching an ID packet transmitted by host equipment in a query state in a query scanning state; when an ID packet corresponding to a target frequency point is received, a preset frequency offset value is set according to the direction pointed by the target frequency point, and the target frequency point is the highest frequency point or the lowest frequency point of the plurality of frequency points; searching and receiving an ID packet corresponding to the target frequency point on a frequency point of a preset frequency offset value; when the ID packet corresponding to the target frequency point is received on the frequency point of the preset frequency offset value, polling each frequency point in the direction pointed by the target frequency point; and taking each frequency point capable of receiving the ID packet in the pointing direction as a target frequency offset value range, so as to poll and correct the frequency offset value in the target frequency offset value range to establish communication connection with the host equipment. The smooth communication establishment of the Bluetooth chip without the crystal oscillator is ensured, and the communication establishment rate is improved.

The utility model discloses a Ka wave band frequency source based on a phase-locked loop structure, which comprises a master controller, a crystal oscillator module, a phase-locked loop module and a frequency doubling processing module, and the phase-locked loop module is respectively connected with the master controller, the crystal oscillator module and the frequency doubling processing module. The phase-locked loop module comprises a power supply module, a phase-locked loop main chip, a loop filter module and a locking state indication module, and the phase-locked loop main chip is respectively connected with the power supply module, the loop filter module, the locking state indication module and the main controller; the frequency doubling processing module comprises a low-pass filter, a high-pass filter, a fixed frequency attenuator, a power amplifier, a frequency doubling chip and a band-pass filter which are connected in sequence, and the input end of the low-pass filter is connected with the output end of the voltage-controlled oscillator. The frequency output by the phase-locked loop module is input to the frequency multiplication processing module, and the frequency multiplication processing module carries out harmonic suppression, attenuation, amplification and frequency multiplication processing on the input frequency, so that the output frequency has the advantages of low phase noise, wide frequency band and high stability.

The invention particularly relates to a self-adaptive closed-loop brain-computer interface neural feedback training system, and relates to the technical field of brain-computer interfaces and neural feedback. A multi-modal feature extraction module; a coefficient fusion module; and a feedback training module. In the invention, a high-precision crystal oscillator clock is adopted to realize time synchronization of electroencephalogram, eye movement and behavior signals, fusion distortion caused by signal dislocation is thoroughly eliminated, and the three types of signals respectively cover cognitive states, visual attention and motion characteristics to form complementary state evaluation dimensions; a refined quantization algorithm is designed for each mode, wherein instantaneous artifacts are eliminated through extreme value screening of the electroencephalogram coefficient, the pixel diameter is calibrated into the physical diameter through the eye movement coefficient so as to eliminate imaging interference, and the large-amplitude movement intensity and high-frequency posture micro change are considered in the behavior coefficient.

The utility model discloses a kind of auxiliary fixing assemblies for crystal oscillator detection, belong to crystal oscillator detection technical field, the utility model includes:Fixed assembly: the fixed assembly is provided with two, two The fixed assembly is set on the base upper surface, the fixed assembly includes: fixed block: the fixed block is set on the base upper surface;Stroke lever: the stroke lever upper end surface is fixedly connected to the fixed block lower surface;Limiting groove: the limiting groove is opened in the base upper surface, the limiting groove inner wall and the stroke lever outer surface are slidingly connected, the utility model is fixed by setting fixed assembly, it is solved that due to the lack of the limiting fixing of crystal oscillator to device, so that the measured crystal oscillator is prone to displacement or shaking, make detection signal unstable, lead to the frequency, amplitude and other parameters of measurement appear larger error problem.

The invention relates to a multi-time-source PTP time service circuit based on a Loongson SOC, and belongs to the technical field of timing systems. The time service circuit comprises a Loongson SOC, an FPGA, a high-stability crystal oscillator, an RS422 transceiver, a network card, a switch, computing blades 1-6 and an external clock source. According to the design scheme, the performance is stable and reliable, the mode is novel, the problem that interfaces between devices are incompatible in the equipment development process is solved, meanwhile, a design thought is provided for the time service scheme of the reinforced server, and a new solution is provided for transition of a new time service scheme and an old time service scheme. The scheme has been successfully applied to a certain reinforced server.

The utility model discloses a circuit system of a high-voltage signal generator. The circuit system comprises a DDS main control circuit, a filter circuit, an operational amplifier circuit, a level conversion circuit, a power supply circuit and a crystal oscillator circuit, the output end of the DDS main control circuit is sequentially connected with the filter circuit and the operational amplifier circuit; the operational amplifier circuit is connected with the power supply circuit and the peripheral port; the DDS main control circuit is also respectively connected with the power supply circuit and the crystal oscillator circuit; the level conversion circuit is connected with the crystal oscillator circuit, the DDS main control circuit and the external power supply circuit; the power supply circuit is connected with an external power supply circuit. According to the scheme, numerous application requirements of high-voltage and high-precision signals can be met.

The utility model discloses interference source equipment. Comprising a power control subsystem for realizing signal receiving and transmitting and power dynamic management, an intermediate frequency signal processing subsystem for realizing high-speed signal acquisition and playback, a main control subsystem for realizing system control, man-machine interaction and data processing, and an air feed subsystem for realizing radiation and receiving of electromagnetic signals, the power control subsystem comprises a signal receiving module used for receiving and transmitting communication signals, a transmitting channel module and a frequency synthesizer module, and the frequency synthesizer module integrates a voltage-controlled constant-temperature crystal oscillator, provides stable clock signals and simultaneously comprises external reference clock access and Beidou time synchronization; through integration of the power control subsystem, the intermediate frequency signal processing subsystem, the main control subsystem and the air feed subsystem, the volume and the weight are reduced, an individual soldier is convenient to carry, and the strategic significance of the utility model is increased.

The utility model relates to the technical field of drainage control, in particular to a reservoir drainage control device, which comprises a reservoir, a water pump, a sewage treatment device, a power supply module, a water level detection module, a timing control module, a water pump driving module and a main control module, the power module is electrically connected with the main control module, the water level detection module, the timing control module and the water pump driving module, the main control module comprises a single chip microcomputer, a crystal oscillator and a reset circuit, and the input end of the single chip microcomputer is electrically connected with the water level detection module, the timing control module, the crystal oscillator and the reset circuit. The output end of the single-chip microcomputer is electrically connected with the water pump control module. The timing control module comprises a timer and a timing assembly, the input end of the timer is electrically connected with the timing assembly, and the output end of the timer is electrically connected with the single-chip microcomputer. The utility model aims to solve the problem that the survival rate of florae is low when a sewage treatment device is in a working state without incoming water.

The invention discloses a clock synchronization method and device for multi-modal human factor data acquisition, edge computing equipment and a medium, which are used for improving the accuracy of data alignment. The system controls a first human factor data acquisition device to send a periodic wave signal to each second human factor data acquisition device; each human factor data acquisition device carries out sampling according to the periodic wave signal; a human factor data receiving end in the system receives data packets sent by each human factor data acquisition device, and each data packet carries a packet number; determining absolute time corresponding to each data packet according to the packet number carried by each data packet; and performing data alignment processing on each data packet according to the absolute time corresponding to each data packet. According to the invention, since the data acquisition devices all take the moment of sending the periodic wave signals as the starting moment of data acquisition, a local real-time clock crystal oscillator is not needed, so that strict synchronization of data acquisition is realized, and the problem of data asynchronization caused by clock drift between the devices is eliminated.

The invention discloses a crystal oscillator-free Bluetooth chip pairing method and device and a communication system, and the method comprises the steps: switching a preset frequency offset value for polling between a paging scanning state and a query scanning state, so as to search an ID packet sent by host equipment in the query state; when the ID packet is received, a slave equipment information packet of the host is sent to the host equipment; receiving a host equipment information packet sent by the host equipment in response to the slave equipment information packet, so that the host equipment can establish Bluetooth connection with a local machine; and sending a connection request to the host device according to the address information of the host device loaded in the host device information packet in the paging state to establish a Bluetooth connection with the host device so as to realize Bluetooth pairing between the local machine and the host device. For low-power-consumption equipment, the Bluetooth chip without the crystal oscillator is ensured to be paired with other equipment to establish connection. The power consumption of low-power-consumption equipment is reduced, the development difficulty, development cost and period of products are reduced, and the equipment is more miniaturized.

The invention discloses a Bluetooth chip without a crystal oscillator and a frequency offset estimation method and device thereof. The method comprises the following steps: entering a query scanning state before establishing communication connection with host equipment; searching an ID packet broadcasted and sent by the host equipment in the query state in the query scanning state; when an ID packet is received, the information transmission duration of the ID packet is multiplexed, and the first sampling period number of the information transmission duration is counted; determining the actual output frequency of the PLL unit according to the first sampling period number; and obtaining a frequency offset value of the Bluetooth chip without the crystal oscillator by using the difference between the actual output frequency and the ideal output frequency of the PLL unit. Therefore, the frequency offset estimation of the Bluetooth chip without the crystal oscillator is realized.

Systems and methods for transducing and storing qubit signals are provided. The system includes a voltage source, a substrate, and a membrane suspended over the substrate. A phononic crystal oscillator is disposed in a first region of the membrane. The phononic crystal oscillator includes a capacitor having a moving electrode including an array of multiple phononic crystal unit cells. The moving electrode is connected to the voltage source. A superconducting circuit disposed in a second region of the membrane. A plurality of phonon shields and an optical resonator may also be disposed on the membrane.

The application provides an electronic watch running time precision regulation system, and relates to the technical field of data processing.The system is used for collecting temperature values, voltage values and cumulative running time, counting the number of pulses output by a crystal oscillator in a unit time, obtaining state data and basic frequency data, calculating frequency offset values in different periods, performing window sliding, calculating drift trend values in different windows, calculating the difference between different states between adjacent periods, obtaining state change values, combining and analyzing the state change values with a frequency drift trend sequence, obtaining a state response coefficient set, identifying effective disturbance components in state change vectors of different periods, calculating pulse compensation values in different periods, obtaining pulse compensation data, correcting timing pulses, obtaining a pulse output sequence, and updating the time of the electronic watch according to the pulse output sequence.The application can regulate the pulse signal of the electronic watch and ensure the precision of running time.

The application discloses a quartz crystal oscillator base sealing method and belongs to the technical field of components and elements. The technical key point is that the upper cover and the base with a KV ring are sealed by a rolling electrode. The resistance of the upper cover is R1, the surface resistance of the KV ring of the base with the KV ring is R2, the resistances of the upper cover and the base on two sides are R5 and R6 respectively, and the maximum output power of the rolling electrode is P max . P max , R1, R5, R6 and R2 need to satisfy the following conditions: P max ·[1+R2 / (R5+R6)] ‑1 ·[1+(R5+R2+R6) / R1] ‑1 is greater than or equal to [P 热阈值 ]. [P 热阈值 ] represents the heat power threshold of the resistances of the upper cover and the base on two sides during the sealing of the rolling electrode. The technical scheme can improve the air tightness of the quartz crystal oscillator.