CN102096426A - Device and method for searching quick start heating control curve of constant temperature crystal oscillator - Google Patents
Device and method for searching quick start heating control curve of constant temperature crystal oscillator Download PDFInfo
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- CN102096426A CN102096426A CN 201010592664 CN201010592664A CN102096426A CN 102096426 A CN102096426 A CN 102096426A CN 201010592664 CN201010592664 CN 201010592664 CN 201010592664 A CN201010592664 A CN 201010592664A CN 102096426 A CN102096426 A CN 102096426A
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Abstract
The invention discloses a device and method for searching a quick start heating control curve of a constant temperature crystal oscillator. The method comprises the steps: transmitting oscillation frequency data of the constant temperature crystal oscillator to a computer, wherein the computer and a singlechip in a constant temperature groove of the constant temperature crystal oscillator are connected with a two-way communication line, heating to a set constant temperature by a temperature control system which consists of the singlechip at the maximum power after the constant temperature crystal oscillator is started and electrified, and heating and controlling the temperature according to the start heating control curve after the constant temperature is reached; and transmitting the temperature data detected by a temperate detection circuit to the computer, and transmitting the oscillation frequency data of a quartz crystal oscillator to the computer, wherein the computer is used for drawing the temperate data, the frequency data and the start heating control curve into the coordinate graph of the same time coordinate. The start heating control curve is manually confirmed according to the coordinate, and the start heating control curve finally recoveries the set constant temperature; and adjusting the start heating control curve to be satisfied at every time according to the aforementioned process.
Description
Technical field
The invention belongs to the constant temperature quartz oscillator part in the quartz oscillator scope, more precisely belong to and seek the quick apparatus and method that add the heat control curve that start of constant-temperature crystal oscillator.
Background technology
Every requirement provides in the electronic installation of correct time and frequency all to be needed to use oscillator that benchmark is provided, wherein quartz oscillator has very high accuracy and is commonly used to take on this role, but quartz oscillator is because certain drift can take place in its concussion frequency of variation of temperature, along with development of technology is had higher requirement to the degree of stability of quartz oscillator concussion frequency.Temperature compensated crystal oscillator compensates the concussion frequency stability that provides higher at different temperature to oscillator, since temperature to the concussion frequency influential then more the quartz oscillator of pin-point accuracy just be placed in the calibration cell that insulation material coats by Single-chip Controlling constant temperature, be referred to as the constant temperature quartz oscillator and be called for short constant-temperature crystal oscillator.Though what calibration cell was interior behind the constant-temperature crystal oscillator electrifying startup can comparatively fast make temperature arrival setting thermostat temperature in the calibration cell by monolithic processor controlled heated constant temperature control system, but the quartz resonator in the calibration cell in the quartz oscillator has a shell, quartz resonator is coated on wherein has only heat slowly to transmit into, final quartz resonator reaches setting thermostat temperature oscillation frequency and just can settle out, this process needs half an hour usually, so just can't meet the demands for the fast occasion of the high startup of precision prescribed.Obviously in order to accelerate the toggle speed of constant-temperature crystal oscillator, make should electrifying startup the time in the calibration cell temperature surpass after the described setting thermostat temperature by monolithic processor controlled heated constant temperature control system and return described setting thermostat temperature according to certain regular movement is final, that is to say that the quick startup of the best constant-temperature crystal oscillator of certain existence adds the heat control curve and makes constant-temperature crystal oscillator to start in the time of weak point of trying one's best, because the measured temperature of temperature sensor of monolithic processor controlled heated constant temperature control system is not the quartz resonator temperature inside, and described temperature-controlling system can only heat and can not freeze, can only stop to heat as need coolings reason such as natural cooling cause using the controlling schemes that comprises various algorithms also be difficult to obtain a satisfaction as described in constant-temperature crystal oscillator start fast and add the heat control curve.
Summary of the invention
Above-mentioned difficulties has proposed a kind of quick apparatus and method that add the heat control curve that start of constant-temperature crystal oscillator of seeking in the prior art in order to solve in the present invention, it is to be noted that described startup adds the heat control curve and refers to the target temperature that As time goes in good time offers described thermostatic control system, because the every index of producing in batches of described constant-temperature crystal oscillator has very high consistance, the quick startup of the constant-temperature crystal oscillator that identical electrical quantity and thermodynamic parameter is arranged thereby use apparatus and method of the present invention to search out adds the heat control curve and is without loss of generality, can be used for producing in batches, solve the practical problems in producing; Described in addition setting thermostat temperature determine that belonging to prior art no longer repeats at this, detailed process is to use such apparatus and method to realize:
A kind of constant-temperature crystal oscillator of seeking starts the device that adds the heat control curve fast: in the calibration cell by the insulation material coating quartz oscillator is housed, also comprise in the described calibration cell by monolithic processor controlled amplification heater circuit and closed loop thermal control system that temperature sensing circuit constituted jointly, the output of described quartz oscillator is connected in frequency meter, the measurement result of described frequency meter is sent to computing machine by data line, and the single-chip microcomputer in described computing machine and the described calibration cell is connected with the circuit of two-way communication.
To the heating of setting thermostat temperature, described single-chip microcomputer adds heat control curve execution heating temperature control according to predetermined startup to the thermostatic control system control heater circuit that described single-chip microcomputer constituted after described constant temperature quartz oscillator start powered on after described temperature sensing circuit measurement arrives described thermostat temperature with peak power; The start of described in addition constant temperature quartz oscillator powers on, and temperature data that the described single-chip microcomputer in back records described temperature sensing circuit is transmitted in described computing machine and the concussion frequency data of described quartz oscillator that described frequency meter is recorded are transmitted in described computing machine, described computing machine adds the heat control curve plotting with described temperature data, described frequency data and startup and becomes same coordinate diagram, and described coordinate diagram transverse axis is respectively temperature and frequency for the time longitudinal axis.
Described startup adds the heat control curve by determining by rule of thumb according to described temperature and frequency curve that manually described startup adds the described setting thermostat temperature of the final recurrence of heat control curve; The described startup of the each adjustment of process adds the heat control curve till satisfaction as described.
Load to start add the heat control curve program before starting by described downloaded in single-chip microcomputer.Also loading can be started the program that adds the heat control curve is sent in the single-chip microcomputer in start-up course by described computing machine.
Description of drawings
Accompanying drawing starts the device synoptic diagram that adds the heat control curve fast for seeking constant-temperature crystal oscillator.
Embodiment
Be described further below in conjunction with Figure of description, used the single-chip microcomputer of model in the present embodiment as C8051F007, this single-chip microcomputer has the FLASH storer of 32K, low power consumption, small size, at a high speed, carry 12 A/D and D/A converter, in addition also has jtag interface, computer can be by this interface to the single-chip microcomputer write-in program, utilize computer can carry out the on-line debugging of non-intrusion type at full speed by jtag interface to single-chip microcomputer, mainly use in the present embodiment be in single-chip microcomputer write-in program and the constant-temperature crystal oscillator start-up course during single-chip microcomputer executive routine computer under the prerequisite that does not influence single-chip microcomputer work, read the temperature data that is arranged in the single-chip microcomputer register in good time.Before carrying out present embodiment, finished described setting thermostat temperature determine and crystal oscillator has been adjusted into product design under this temperature nominal frequency, its thermodynamics structure design debug rationally and is finalized the design, the single-chip microcomputer temperature-controlling system debugged normally, above-mentioned all is that prior art is no longer repeated.Communication between single-chip microcomputer and the computer in the present embodiment is connected with computer by C8051F series monolithic dedicated serial adapter and through USB interface by jtag interface as shown in Figure 1, the output of quartz oscillator connects frequency meter, and the real-time frequency signal of frequency meter inserts computer through serial communication mode by USB interface.In the computer following program should be arranged: can add the heat control curve by the described startup of artificial accurately setting, and this curve is converted to data; The temperature data of the single-chip microcomputer temperature-controlling system read in the constant-temperature crystal oscillator start-up course can be changed into the curve that transverse axis is the time; Also the frequency data of the constant-temperature crystal oscillator start-up course that records can be converted into the curve that transverse axis is the time; Under transverse axis is the same coordinate of time, above-mentioned three curves are combined among the figure.The operator should have the knowledge and the particularly heat conducting knowledge of calorifics knowledge of control theory aspect.It needs to be noted the big heating power of trying one's best that has that described temperature-controlling system should design within the acceptable range, when temperature arrives described thermostat temperature in the calibration cell, set thermostat temperature thereby also need a bigger heat because the time-delay of heat transfer process causes quartz resonator also not to be heated to, therefore, start and to add the heat control curve and should surpass to set and fall after rise behind the thermostat temperature certain value even final recurrence that stop to heat set thermostat temperature.Test is each time finished the operator and is tackled three curves and analyze and reset to start and add the heat control curve and try till satisfaction again, the constant-temperature crystal oscillator of test fully should be cooled off between twice test.The operator should be understood that each output frequency value correspondence of described constant-temperature crystal oscillator corresponding temperature value, has only when nominal value appears in output frequency, and the temperature that indicates quartz resonator just is to set thermostat temperature.Said process often will just can meet the demands through tens times even up to a hundred tests, and this typing for a product is worth.Present embodiment was finished startup heating process in three minutes, and startup in ten minutes is finished and reached the nominal technical indicator.This means that the system that uses this constant-temperature crystal oscillator can begin relevant initialization in three minutes and carry out primary calibration in the time of ten minutes again and can start working immediately.Shorten to 1/3rd start-up time with respect to common constant-temperature crystal oscillator, significant for the system that requires to start fast.
Claims (5)
1. seek the quick device that adds the heat control curve that starts of constant-temperature crystal oscillator for one kind: in the calibration cell by the insulation material coating quartz oscillator is housed, also comprise in the described calibration cell by monolithic processor controlled amplification heater circuit and closed loop thermal control system that temperature sensing circuit constituted jointly, it is characterized in that: the output of described quartz oscillator is connected in frequency meter, the measurement result of described frequency meter is sent to computing machine by data line, and the single-chip microcomputer in described computing machine and the described calibration cell is connected with the circuit of two-way communication.
2. start the method that adds the heat control curve fast according to claim 1 described a kind of constant-temperature crystal oscillator of seeking, it is characterized in that: to the heating of setting thermostat temperature, described single-chip microcomputer adds heat control curve execution heating temperature control according to predetermined startup to the thermostatic control system control heater circuit that described single-chip microcomputer constituted after described constant temperature quartz oscillator start powered on after described temperature sensing circuit measurement arrives described setting thermostat temperature with peak power; Simultaneously described constant temperature quartz oscillator start powers on, and temperature data that the described single-chip microcomputer in back records described temperature sensing circuit is transmitted in described computing machine and the concussion frequency data of described quartz oscillator that described frequency meter is recorded are transmitted in described computing machine, described computing machine adds the heat control curve plotting with described temperature data, described frequency data and startup and becomes same coordinate diagram, and described coordinate diagram transverse axis is respectively temperature and frequency for the time longitudinal axis.
3. start the method that adds the heat control curve fast according to claim 2 described a kind of constant-temperature crystal oscillators of seeking, it is characterized in that: described startup adds the heat control curve by determining by rule of thumb according to described temperature and frequency curve that manually described startup adds the heat control curve must finally return described setting thermostat temperature; Adjust described startup after process is tested as described at every turn and add the heat control curve till satisfaction.
4. start the methods that add the heat control curve fast according to the described a kind of constant-temperature crystal oscillators of seeking of claim 3, it is characterized in that: load and start before the program start that adds the heat control curve by described downloaded in single-chip microcomputer.
5. start the method that adds the heat control curve fast according to claim 3 described a kind of constant-temperature crystal oscillators of seeking, it is characterized in that: loading starts the program that adds the heat control curve and is sent in the single-chip microcomputer in start-up course by described computing machine.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103105530A (en) * | 2013-01-08 | 2013-05-15 | 河北远东通信系统工程有限公司 | Detection method for frequency hopping changes of crystal oscillator |
| CN103713218A (en) * | 2013-12-27 | 2014-04-09 | 广东大普通信技术有限公司 | Crystal oscillator temperature characteristic automatic measuring method and system |
| CN105811965A (en) * | 2016-03-14 | 2016-07-27 | 西安工业大学 | High-precision quartz crystal oscillator and realization method thereof |
| CN113759187A (en) * | 2021-01-07 | 2021-12-07 | 大唐移动通信设备有限公司 | Method, device and system for detecting frequency hopping failure of crystal oscillator caused by wafer pollution |
| CN114489195A (en) * | 2021-12-30 | 2022-05-13 | 成都安则优科技有限公司 | Constant-temperature crystal oscillator stepping type heating method, device and system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103105530A (en) * | 2013-01-08 | 2013-05-15 | 河北远东通信系统工程有限公司 | Detection method for frequency hopping changes of crystal oscillator |
| CN103713218A (en) * | 2013-12-27 | 2014-04-09 | 广东大普通信技术有限公司 | Crystal oscillator temperature characteristic automatic measuring method and system |
| CN105811965A (en) * | 2016-03-14 | 2016-07-27 | 西安工业大学 | High-precision quartz crystal oscillator and realization method thereof |
| CN105811965B (en) * | 2016-03-14 | 2019-02-19 | 西安工业大学 | A kind of high-precision quartz crystal oscillator configuration and its implementation |
| CN113759187A (en) * | 2021-01-07 | 2021-12-07 | 大唐移动通信设备有限公司 | Method, device and system for detecting frequency hopping failure of crystal oscillator caused by wafer pollution |
| CN114489195A (en) * | 2021-12-30 | 2022-05-13 | 成都安则优科技有限公司 | Constant-temperature crystal oscillator stepping type heating method, device and system |
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