CN102096426B - A kind of method finding constant-temperature crystal oscillator quick start heating controlling curve - Google Patents
A kind of method finding constant-temperature crystal oscillator quick start heating controlling curve Download PDFInfo
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- CN102096426B CN102096426B CN201010592664.3A CN201010592664A CN102096426B CN 102096426 B CN102096426 B CN 102096426B CN 201010592664 A CN201010592664 A CN 201010592664A CN 102096426 B CN102096426 B CN 102096426B
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Abstract
The invention discloses a kind of apparatus and method finding constant-temperature crystal oscillator quick start heating controlling curve, the concussion frequency data of constant-temperature crystal oscillator are sent to computing machine, single-chip microcomputer in the calibration cell of computing machine and constant-temperature crystal oscillator is connected to the circuit of two-way communication, the temperature-controlling system be made up of single-chip microcomputer after constant-temperature crystal oscillator start powers on to the heating of setting thermostat temperature, performs heated for controlling temperature according to startup computer heating control curve with peak power after arriving thermostat temperature; The concussion the frequency data simultaneously temperature data that temperature sensing circuit records being transmitted in computing machine and quartz oscillator are transmitted in computing machine, and computing machine is by temperature data, frequency data and start the coordinate diagram that computer heating control Drawing of Curve becomes same time coordinate.Start computer heating control curve by manually determining according to above-mentioned coordinate diagram, this startup computer heating control curve finally returns setting thermostat temperature; As above process adjusts described startup computer heating control curve till satisfaction at every turn.
Description
Technical field
The invention belongs to the constant temperature quartz oscillator part in quartz oscillator scope, more precisely belong to the apparatus and method finding constant-temperature crystal oscillator quick start heating controlling curve.
Background technology
Every requirement provides in the electronic installation of correct time and frequency all to be needed to use oscillator to provide benchmark, wherein quartz oscillator has very high accuracy and is commonly used to take on this role, but quartz oscillator due to temperature change its concussion frequency can there is certain drift, along with technology progress to quartz oscillator concussion frequency degree of stability have higher requirement.Temperature compensated crystal oscillator to compensate oscillator for different temperature and provides higher concussion frequency stability, since temperature on concussion frequency have impact then more the quartz oscillator of pin-point accuracy be just placed in the coated calibration cell by Single-chip Controlling constant temperature of insulation material, be referred to as constant temperature quartz oscillator be called for short constant-temperature crystal oscillator.Although can comparatively fast to make in calibration cell temperature arrive setting thermostat temperature by monolithic processor controlled heated constant temperature control system after constant-temperature crystal oscillator electrifying startup in calibration cell, but the quartz resonator in calibration cell in quartz oscillator has a shell, quartz resonator is coated on wherein only has 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 starts fast occasion for precision prescribed height and just cannot meet the demands.Obviously in order to accelerate the toggle speed of constant-temperature crystal oscillator, by monolithic processor controlled heated constant temperature control system should electrifying startup time make temperature in calibration cell exceed described setting thermostat temperature after finally return described setting thermostat temperature according to certain regular movement, that is certain constant-temperature crystal oscillator quick start heating controlling curve that there is the best makes constant-temperature crystal oscillator can start within the as far as possible short time, due to monolithic processor controlled heated constant temperature control system temperature sensor measured by temperature be not the temperature of quartz resonator inside, and described monolithic processor controlled heated constant temperature control system can only heat and can not freeze, the reasons such as heating nature cooling can only be stopped to cause using the control program comprising various algorithm to be also difficult to obtain constant-temperature crystal oscillator quick start heating controlling curve as described in a satisfaction as lowered the temperature.
Summary of the invention
The present invention proposes a kind of apparatus and method finding constant-temperature crystal oscillator quick start heating controlling curve to solve above-mentioned difficulties in prior art, it is to be noted that described startup computer heating control curve refers to the target temperature being As time goes in good time supplied to described monolithic processor controlled heated constant temperature control system, because the constant-temperature crystal oscillator indices of batch production has very high consistance, the constant-temperature crystal oscillator quick start heating controlling curve having identical electrical quantity and thermodynamic parameter thus to use apparatus and method of the present invention to search out without loss of generality, may be used for batch production, solve the practical problems in production, the determination of described setting thermostat temperature belongs to prior art and no longer repeats at this in addition, and detailed process uses such apparatus and method to realize:
A kind of device finding constant-temperature crystal oscillator quick start heating controlling curve: be made up of constant temperature quartz oscillator 1 and frequency meter 2 and computing machine 3; Described constant temperature quartz oscillator 1 is made up of with amplification heater circuit 7 and temperature sensing circuit 8 quartz oscillator 5 be placed in the coated calibration cell of insulation material 4 and single-chip microcomputer 6, and described single-chip microcomputer 6 forms closed loop thermostatic control system 9 with amplification heater circuit 7 and temperature sensing circuit 8.The output of described constant temperature quartz oscillator 1 is connected to described frequency meter 2, and the measurement result of described frequency meter 2 is sent in described computing machine 3 by data line, and described computing machine 3 and described single-chip microcomputer 6 are connected with the circuit of two-way communication.
After described constant temperature quartz oscillator 1 start powers on, the closed loop thermostatic control system 9 that described single-chip microcomputer 6 controls controls inner amplification heater circuit 7 with the thermostat temperature heating of peak power to setting, when described temperature sensing circuit 8 measures after temperature arrives the thermostat temperature of described setting, described single-chip microcomputer 6 carries out heated for controlling temperature according to predetermined startup computer heating control curve; After described constant temperature quartz oscillator 1 start powers on simultaneously, the oscillation frequency data of the temperature data that described temperature sensing circuit 8 records by described single-chip microcomputer 6 and the described constant temperature quartz oscillator 1 that described frequency meter 2 records are transmitted in described computing machine 3, described temperature data, described frequency data and described predetermined startup computer heating control Drawing of Curve are become same coordinate diagram by described computing machine 3, and described coordinate diagram transverse axis is the time, the longitudinal axis is respectively temperature and frequency.
Described startup computer heating control curve is by manually determining by rule of thumb, and described startup computer heating control curve finally must return described setting thermostat temperature; Adjust described startup computer heating control curve after each test to try again till satisfaction.
Load start computer heating control curve program before startup by described downloaded in single-chip microcomputer.
Accompanying drawing explanation
Accompanying drawing is the device schematic diagram finding constant-temperature crystal oscillator quick start heating controlling curve.
Embodiment
Be described further below in conjunction with Figure of description, employ the single-chip microcomputer that model is C8051F007 in the present embodiment, this single-chip microcomputer has the FLASH memory of 32K, low power consumption, small size, at a high speed, carry A/D and the D/A converter of 12, in addition also there is jtag interface, computing machine can by this interface to single-chip microcomputer write-in program, utilize computing machine can carry out the on-line debugging of non-intrusion type at full speed to single-chip microcomputer by jtag interface, what mainly use in the present embodiment is under the prerequisite not affecting single-chip microcomputer work, read on single-chip microcomputer executive routine computer-chronograph in single-chip microcomputer write-in program and constant-temperature crystal oscillator start-up course the temperature data being arranged in single-chip microcomputer register in good time.Perform the determination that completed described setting thermostat temperature before the present embodiment and at this temperature crystal oscillator be adjusted to the nominal frequency of product design, its composite nalysis design debug rationally and shape, single-chip microcomputer temperature-controlling system debugged normally, above-mentioned is all that prior art is no longer repeated.Communication as shown in drawings in the present embodiment between single-chip microcomputer 6 with computing machine 3 is connected with computing machine 3 through USB interface by C8051F series monolithic dedicated serial adapter by jtag interface, the output of quartz oscillator 5 connects frequency meter 2, and the real-time frequency signal of frequency meter 2 accesses through the USB interface of serial communication mode by computing machine 3.Following program is had: can by the described startup computer heating control curve of artificial accurately setting, and be data by this Curve transform in computing machine 3; The temperature data of the single-chip microcomputer temperature-controlling system read in 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 recorded can be converted into the curve that transverse axis is the time; Under the same coordinate that transverse axis is the time, above-mentioned three curves are combined in a figure.Operator should have knowledge and the calorifics knowledge particularly heat conducting knowledge of control theory aspect.What it needs to be noted that described single-chip microcomputer temperature-controlling system should design within the acceptable range has as far as possible large heating power, when in calibration cell, temperature arrives described thermostat temperature, time delay due to heat transfer process causes quartz resonator not also to be heated to setting thermostat temperature and thus also needs a larger heat, therefore, start after computer heating control curve should exceed setting thermostat temperature certain value and fall the finally recurrence setting thermostat temperature that even stops heating after rise.Test operator each time to tackle three curves and carry out analyzing and reset and start computer heating control curve and try again till satisfied, the constant-temperature crystal oscillator of test fully to be cooled between twice test.Operator should know that each output frequency value of described constant-temperature crystal oscillator correspond to the temperature value of corresponding quartz crystal, only has when nominal value appears in output frequency, indicates that the temperature of quartz resonator is just setting thermostat temperature.Said process often will through tens times even up to a hundred tests just can meet the demands, this sizing for a product is worth.The present embodiment completes startup heating process in three minutes, within ten minutes, has started and has reached nominal technical indicator.Carry out primary calibration again when this means to use the system of this constant-temperature crystal oscillator that relevant initialization ten minutes within three minutes, can be started can start working immediately.1/3rd are shortened to, for requiring that the system significance started fast is great relative to start-up time common constant-temperature crystal oscillator.
Claims (3)
1. find a method for constant-temperature crystal oscillator quick start heating controlling curve,
The apparatus structure used is: the coated calibration cell of insulation material is built with quartz oscillator, monolithic processor controlled amplification heater circuit and temperature sensing circuit, common formation closed loop thermal control system, the output of described quartz oscillator is connected to 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 described calibration cell is connected with the circuit of two-way communication;
The method comprise the steps: the start of constant temperature quartz oscillator power on after the thermostatic control system that forms of described single-chip microcomputer control heater circuit with peak power to the heating of setting thermostat temperature, after described temperature sensing circuit measures the described setting thermostat temperature of arrival, described single-chip microcomputer performs heated for controlling temperature according to predetermined startup computer heating control curve, described startup computer heating control curve is by manually determining by rule of thumb according to described temperature and frequency curve, and described startup computer heating control curve finally must return described setting thermostat temperature; As described in process test at every turn and to start computer heating control curve as described in rear adjustment till satisfied; After described constant temperature quartz oscillator start powers on simultaneously, the temperature data that described temperature sensing circuit records is transmitted in described computing machine by described single-chip microcomputer and the concussion frequency data of described quartz oscillator that recorded by described frequency meter are transmitted in described computing machine, described temperature data, described frequency data and startup computer heating control Drawing of Curve are become same coordinate diagram by described computing machine, and described coordinate diagram transverse axis is that the time longitudinal axis is respectively temperature and frequency.
2. a kind of method finding constant-temperature crystal oscillator quick start heating controlling curve according to claim 1, is characterized in that: load the program starting computer heating control curve start before by described downloaded in single-chip microcomputer.
3. a kind of method finding constant-temperature crystal oscillator quick start heating controlling curve according to claim 1, is characterized in that: load the program starting computer heating control curve and be sent in single-chip microcomputer in start-up course by described computing machine.
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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 |
| 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 |
| CN113759187B (en) * | 2021-01-07 | 2023-05-05 | 大唐移动通信设备有限公司 | Method, device and system for detecting frequency hopping failure of crystal oscillation 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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| CN201113921Y (en) * | 2007-09-26 | 2008-09-10 | 东莞市金振电子有限公司 | High precision soft synchronous microcomputer compensation crystal oscillator |
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| CN101609126A (en) * | 2009-07-16 | 2009-12-23 | 东莞市大普通信技术有限公司 | The Auto-Test System of temperature compensating crystal oscillator |
| CN101662269A (en) * | 2009-09-18 | 2010-03-03 | 河北博威集成电路有限公司 | Method for realizing constant temperature compensation crystal oscillator |
| CN101713811A (en) * | 2009-10-29 | 2010-05-26 | 天津必利优科技发展有限公司 | System for automatically testing parameters of quartz crystal oscillator |
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| WO2008112182A1 (en) * | 2007-03-09 | 2008-09-18 | Radioframe Networks, Inc. | Crystal oscillator temperature control and compensation |
| CN201113921Y (en) * | 2007-09-26 | 2008-09-10 | 东莞市金振电子有限公司 | High precision soft synchronous microcomputer compensation crystal oscillator |
| CN101609126A (en) * | 2009-07-16 | 2009-12-23 | 东莞市大普通信技术有限公司 | The Auto-Test System of temperature compensating crystal oscillator |
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