CN107145184B - A kind of temperature-compensation method of variable power reference source - Google Patents
A kind of temperature-compensation method of variable power reference source Download PDFInfo
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- CN107145184B CN107145184B CN201710477919.3A CN201710477919A CN107145184B CN 107145184 B CN107145184 B CN 107145184B CN 201710477919 A CN201710477919 A CN 201710477919A CN 107145184 B CN107145184 B CN 107145184B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/567—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for temperature compensation
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- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
The invention proposes a kind of temperature-compensation methods of variable power reference source, firstly, carrying out the linear compensation under room temperature to power meter reference source to be compensated with computer under normal temperature environment；Next, obtaining DAC deviation and temperature detection ADC value of all power meters to be compensated at 0 DEG C；Then, DAC deviation and temperature detection ADC value of all reference sources to be compensated at 10 DEG C, 40 DEG C, 50 DEG C are obtained；Subsequently, the DAC value under room temperature is modified with the corresponding table of performance number, obtains 0 DEG C, 10 DEG C, 40 DEG C, 50 DEG C of DAC correction card；Power meter is in normal work, every fixed intervals read a secondary reference temperature detection ADC value, according to temperature range locating for temperature detection ADC value and the DAC correction card closed on, using linear interpolation algorithm, obtain a current DAC and the corresponding table of performance number, in power probe calibration, according to the DAC value of the Tabulator Setting reference source.
Description
Technical field
The present invention relates to the field of test technology, in particular to a kind of temperature-compensation method of variable power reference source.
Background technique
There is detector diode in variable power reference source circuit, at different temperatures, detector diode influences ratio to temperature
It is more sensitive, in order to eliminate influence of the temperature to detector diode, need to carry out temperature-compensating to variable power reference source circuit.
As shown in Figure 1, variable power reference source circuit, comprising: signal generation unit A1, generating frequency is the continuous of 1GHz
Wave signal amplifies by first order amplifier A2, more than power amplification to+13dBm；Power modulators A3, according to width
Modulation generator A13 output voltage size is spent, itself output power size is adjusted；Second level amplifier A4, to power modulators
A3 output signal carries out power amplification, and maximum power output is greater than+25dBm；Directional coupler A5, main road are output to decaying
Network A 6, the panel of power meter is output to using port match network A 7, and the coupled end of directional coupler A5 is output to detection
Device A11, wave detector A11 are made of a detector diode D1 and a detection capacitor C1, and R1 is that wave detector output adjusts resistance；
16 DACA12, R2 are that DAC output adjusts resistance；Wave detector A11 output voltage exports through it and adjusts resistance R1, DAC A12
Output voltage exports adjusting resistance R2 through it and works together to amplitude modulation generator A13, and amplitude modulation generator A13 is according to inspection
Wave device A11, DAC A12 output voltage generate the voltage of control power modulators A3, to control the power output of reference source；
Temperature sensor A8 is located near wave detector A11；Temperature detection ADC A9, for detecting the voltage value of temperature sensor A8.
Since detector diode D1 is temperature sensor, when the temperature varies, detector diode D1 output end Vt
Voltage value change, the rear end amplitude modulation generator A13 voltage changes, and power modulators A3 is influenced, thus shadow
Ring the power output for arriving reference source.
Existing technical solution is: computer, reference power meter and power meter to be compensated are constructed reference source temperature-compensating
Power meter is put into insulating box by system, and the power probe of reference power meter is connected to the output of its reference source, with computer journey
Control reference power meter and power meter to be compensated at different temperature compensate power meter reference source to be compensated.
Existing reference source compensation method needs to adopt under 0 DEG C, 10 DEG C, 40 DEG C and 50 DEG C temperature spot by stepping of 1dB
A power reference source can only be compensated by computer-automatic collection data every time by collecting data, offset data, need the time about 5
Hour, compensation efficiency is low.
Summary of the invention
The present invention proposes a kind of temperature-compensation method of variable power reference source, solves power reference source in the prior art
The problem of temperature-compensating low efficiency.
The technical scheme of the present invention is realized as follows:
A kind of temperature-compensation method of variable power reference source is constructed with computer, reference power meter, power meter to be compensated
Compensation system, comprising the following steps:
Firstly, carrying out the linear compensation under room temperature under normal temperature environment to power meter reference source to be compensated with computer, obtaining
The corresponding table of DAC value and performance number under to room temperature saves the corresponding temperature detection ADC value of each power points；
Next, obtaining DAC deviation and temperature detection ADC value of all power meters to be compensated at 0 DEG C；
Then, DAC deviation and temperature detection ADC value of all reference sources to be compensated in target temperature are obtained；
Subsequently, the DAC deviation and temperature detection according to all reference sources to be compensated in 0 DEG C and target temperature
ADC value is modified the DAC value under room temperature with the corresponding table of performance number, obtains the DAC amendment of 0 DEG C and target temperature
Table；
Power meter is in normal work, and every fixed intervals read a secondary reference temperature detection ADC value, according to temperature detection
Temperature range locating for ADC value and the DAC correction card closed on obtain a current DAC and performance number using linear interpolation algorithm
Corresponding table, in power probe calibration, according to the DAC value of the Tabulator Setting reference source.
Optionally, the temperature-compensation method of above-mentioned a kind of variable power reference source, specifically includes the following steps:
Step 1 carries out the linear compensation under room temperature to power meter reference source to be compensated with computer under normal temperature environment,
It establishes under room temperature between -40dBm~+20dBm, the corresponding relationship of the DAC of integral point power, while recording temperature detection under room temperature
ADC value；Power meter reference source stepping to be compensated is set, and the DAC corresponding relationship of non-integer power points is by integral point power DAC by inserting
Value obtains, and obtains the corresponding table of DAC value and performance number under room temperature, saves the corresponding temperature detection ADC value of each power points；
Step 2, set temperature box temperature degree are 0 DEG C, and a period of time is kept after temperature drops to 0 DEG C, allows power to be compensated
Meter temperature settles out；
Calibration power probe is connected to the reference source output terminal of reference power meter, carries out calibration operation by step 3, then will
Calibration power probe is connected to half steel cable, and another reference source for terminating to the first power meter to be compensated of half steel cable is exported
End, carries out school Z-operation；
Step 4, opens the temperature-compensating panel of the first power meter reference source to be compensated, firstly,+20dBm menu is chosen,
The coefficient on menu is adjusted, so that the degree in reference power meter is+20dBm ± 0.004dB；Then, be sequentially adjusted in+10dBm,
The output of 0dBm, -10dBm, -30dBm, so that reference power meter measured value deviation is within ± 0.004dB；Subsequently, by 0 DEG C
When the first power meter reference source to be compensated DAC deviation and temperature detection ADC value, be saved in the first power meter to be compensated；
Half steel cable, is connected to the reference source output terminal of the second power meter to be compensated by step 5, repeats step 4, obtains the
Deviation and temperature detection ADC value of the two power meter reference sources to be compensated at 0 DEG C, and it is saved in the second power meter to be compensated；According to
It is secondary that half steel cable is connected to other power meters to be compensated with reference to source output terminal, it is inclined in 0 DEG C of DAC to obtain all power meters to be compensated
Difference and temperature detection ADC value；
Sweat box is successively set as 10 DEG C, 40 DEG C, 50 DEG C by step 6, after temperature reaches setting value, is kept for one section
Time repeats step 4~step 5, obtains DAC deviation and temperature of all reference sources to be compensated at 10 DEG C, 40 DEG C, 50 DEG C
Degree detection ADC value；
Step 7, according to the temperature detection ADC value of obtained each temperature spot and+20dBm ,+10dBm, 0dBm ,-
10dBm, -30dBm power points DAC deviation are modified the DAC value under room temperature with the corresponding table of performance number, obtain 0
DEG C, 10 DEG C, 40 DEG C, 50 DEG C of DAC correction card；
Step 8, power meter is in normal work, and every fixed intervals read a secondary reference temperature detection ADC value, according to temperature
Temperature range and the DAC correction card closed on locating for degree detection ADC value, using linear interpolation algorithm, obtain a current DAC with
The corresponding table of performance number, in power probe calibration, according to the DAC value of the Tabulator Setting reference source.
Optionally, in the step 1, it is 0.1dB that stepping, which is arranged, in reference source, the DAC corresponding relationship of non-integer power points by
Integral point power DAC is obtained by interpolation, obtains the table DAC corresponding with performance number of DAC value under room temperatureChang Man (ADC)[601], the table
Using 0.1dB as stepping, the corresponding temperature detection ADC value of each power points is saved.
The beneficial effects of the present invention are:
(1) above-mentioned temperature-compensation method according to the present invention once can at least compensate 12 in 1 cubic metre of sweat box
Reference source, the used time about 6.5 hours, efficiency improved about 10 times relative to current method, high-efficient；
(2) compensation can be completed by the way that several parameters are simply provided manually, it is easy to operate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the circuit diagram of variable power reference source circuit；
Fig. 2 is the control block diagram of temperature compensation system of the invention；
Fig. 3 is the schematic diagram of reference source temperature-compensating panel of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The principle that temperature-compensation method of the invention carries out temperature-compensating to reference source is: at different temperatures, adjusting Fig. 1
The output of middle DAC A12, compensation wave detector A11 is since temperature change causes the variation of Vt, to guarantee reference source output power
Accurately.
As shown in Fig. 2, temperature-compensation method of the invention is based on a temperature compensation system, which includes:
Can set temperature sweat box N1, power meter N2 (1)~N2 (n) to be compensated is placed in sweat box N1, when the body of sweat box N1
Product can at least put down 12 power meters to be compensated when being 1 cubic metre simultaneously；Reference power meter N3, calibration power probe N4, electricity
Cable L1 connection reference power meter N3 and calibration power probe N4, mono- end half steel cable L2 are connected to the reference source of power meter to be compensated,
Other end is connected to calibration power probe N4, and calibration power probe N4 will be put into outside sweat box, and the length of half steel cable L2 is
0.5m。
The temperature compensation procedure of temperature-compensation method of the invention is specific as follows:
Step 1, at normal temperature under (20 DEG C~25 DEG C) environment, with computer, reference power meter, power meter structure to be compensated
Temperature compensation system is built, has temperature sensor and temperature ADC converter in every power meter to be compensated.Preheating 30 minutes it
Afterwards, the linear compensation under room temperature is carried out to power meter reference source to be compensated with computer program-control, establish -40dBm under room temperature~+
Between 20dBm, the corresponding relationship of the DAC of integral point power, such as DAC+20dbm、DAC+19dbm......DAC-40dbm, while recording room temperature
Lower temperature detection ADC value.
Above-mentioned power meter reference source setting stepping to be compensated is 0.1dB, and the DAC corresponding relationship of non-integer power points is by integral point
Power DAC is obtained by interpolation, obtains the corresponding table of DAC value and performance number under room temperature
DACRoom temperature (ADC)[601], which saves the corresponding ADC value of each power points using 0.1dB as stepping.
Step 2, set temperature case N1 temperature is 0 DEG C, after temperature drops to 0 DEG C, is kept for 30 minutes, allows function to be compensated
Rate meter temperature settles out.
Step 3, setting calibration power pop one's head in N4 resolution ratio to be shown to after decimal point 3.Calibration power probe N4 is connect
To the reference source output terminal of reference power meter N3, " calibration " operation is carried out, calibration power probe N4 is then connected to half steel cable
L2, and by another reference source for terminating to the first power meter N2 (1) to be compensated of half steel cable L2, carry out " school zero " operation.
Step 4 opens the reference source temperature-compensating panel of the first power meter N2 (1) to be compensated, as shown in figure 3, K1~K6
For key on power meter panel, K1 is pressed first, chooses+20dBm menu, by the number key of power meter panel, adjust on menu
Coefficient so that degree in reference power meter N4 is+20dBm ± 0.004dB.Then successively press K1~K5, adjustment+10dBm,
The output of 0dBm, -10dBm, -30dBm, so that reference power meter measured value deviation is within ± 0.004dB.By K6, when by 0 DEG C
The DAC deviation delta DAC of first power meter N2 (1) reference source to be compensated+20~Δ DAC-30With 0 DEG C of temperature ADC value (ADC), save
Into the first power meter to be compensated.
The half steel cable L2 reference source for being connected to the second power meter N2 (2) to be compensated is exported, repeats step 4 by step 5,
Deviation and temperature detection ADC value of second power meter N2 (2) reference source to be compensated at 0 DEG C are obtained, and is saved in second wait mend
Repay power meter N2 (2).Successively half steel cable L2 is connected in other power meter N2 (3)~N2 (n) to be compensated, obtains needing to be mended
Repay deviation and temperature detection ADC value of the power meter reference source at 0 DEG C.
Sweat box N1 is successively set as 10 DEG C, 40 DEG C, 50 DEG C by step 6, after temperature reaches setting value, keeps 30
Minute, step 4~step 5 is repeated, DAC deviation of all power meter reference sources to be compensated at 10 DEG C, 40 DEG C, 50 DEG C is obtained
Value and temperature detection ADC value.
Step 7, power meter to be compensated is according to temperature detection ADC value (0 DEG C (ADC), 10 DEG C of obtained each temperature spot
(ADC), 40 DEG C (ADC), 50 DEG C (ADC)) and representative power points (+20dBm ,+10dBm, 0dBm, -10dBm, -30dBm)
Deviation of the DAC relative to room temperature, to the table DAC under room temperatureRoom temperature (ADC)[601] be modified, obtain 0 DEG C, 10 DEG C, 40 DEG C,
50 DEG C of DAC correction card DAC0℃(ADC)[601]、DAC10℃(ADC)[601]、DAC40℃(ADC)[601]、DAC50℃(ADC)[601]。
Step 8, power meter N2 (1)~N2 (n) read once it at interval of 1 minute and examine with reference to source temperature in normal work
It surveys ADC value T (ADC), according to temperature range locating for T (ADC) and the DAC correction card that closes on, (such as Current Temperatures ADC is in 0
DEG C, between 10 DEG C, then according to table DAC0℃(ADC)[601] and DAC10℃(ADC)[601]), using linear interpolation algorithm, one is obtained
A current DAC and corresponding table DAC of performance numberT(ADC)[601], when power probe is calibrated, according to DACT(ADC)[601] table
Set the DAC value of reference source.
Above-mentioned temperature-compensation method according to the present invention once can at least compensate 12 ginsengs in 1 cubic metre of sweat box
Examine source, the used time about 6.5 hours, efficiency improved about 10 times relative to current method, high-efficient；It is several by being simply provided manually
Compensation can be completed in parameter, easy to operate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in this hair
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of temperature-compensation method of variable power reference source is mended with computer, reference power meter, power meter to be compensated building
Repay system, which comprises the following steps:
Step 1 carries out the linear compensation under room temperature to power meter reference source to be compensated with computer under normal temperature environment, establishes
Under room temperature between -40dBm~+20dBm, the corresponding relationship of the DAC of integral point power, while recording temperature detection ADC value under room temperature；
Power meter reference source stepping to be compensated is set, and the DAC corresponding relationship of non-integer power points is obtained by integral point power DAC by interpolation
It arrives, obtains the corresponding table of DAC value and performance number under room temperature, save the corresponding temperature detection ADC value of each power points；
Step 2, set temperature box temperature degree are 0 DEG C, and a period of time is kept after temperature drops to 0 DEG C, allows power meter temperature to be compensated
Degree settles out；
Calibration power probe is connected to the reference source output terminal of reference power meter, calibration operation is carried out, then by standard by step 3
Power probe is connected to half steel cable, and by another reference source output terminal for terminating to the first power meter to be compensated of half steel cable,
Carry out school Z-operation；
Step 4, opens the temperature-compensating panel of the first power meter reference source to be compensated, firstly, choosing+20dBm menu, adjusts
Coefficient on menu, so that the degree in reference power meter is+20dBm ± 0.004dB；Then, be sequentially adjusted in+10dBm,
The output of 0dBm, -10dBm, -30dBm, so that reference power meter measured value deviation is within ± 0.004dB；Subsequently, by 0 DEG C
When the first power meter reference source to be compensated DAC deviation and temperature detection ADC value, be saved in the first power meter to be compensated；
Half steel cable, is connected to the reference source output terminal of the second power meter to be compensated by step 5, repeats step 4, obtain second to
Deviation and temperature detection ADC value of the power meter reference source at 0 DEG C are compensated, and is saved in the second power meter to be compensated；Successively will
Half steel cable is connected to other power meters to be compensated with reference to source output terminal, obtains DAC deviation of all power meters to be compensated at 0 DEG C
With temperature detection ADC value；
Sweat box is successively set as 10 DEG C, 40 DEG C, 50 DEG C, after temperature reaches setting value, when being kept for one section by step 6
Between, step 4~step 5 is repeated, DAC deviation and temperature of all reference sources to be compensated at 10 DEG C, 40 DEG C, 50 DEG C are obtained
Detect ADC value；
Step 7, according to the temperature detection ADC value of obtained each temperature spot and+20dBm ,+10dBm, 0dBm, -10dBm, -
30dBm power points DAC deviation is modified the DAC value under room temperature with the corresponding table of performance number, obtain 0 DEG C, 10 DEG C,
40 DEG C, 50 DEG C of DAC correction card；
Step 8, for power meter in normal work, every fixed intervals read a secondary reference temperature detection ADC value, are examined according to temperature
It surveys temperature range locating for ADC value and the DAC correction card closed on and one current DAC and power is obtained using linear interpolation algorithm
It is worth corresponding table, in power probe calibration, according to the DAC value of the Tabulator Setting reference source.
2. a kind of temperature-compensation method of variable power reference source as described in claim 1, which is characterized in that the step 1
In, it is 0.1dB that stepping, which is arranged, in reference source, and the DAC corresponding relationship of non-integer power points is obtained by integral point power DAC by interpolation,
Obtain the table DAC corresponding with performance number of DAC value under room temperatureRoom temperature (ADC)[601], which saves each function using 0.1dB as stepping
The corresponding temperature detection ADC value of rate point.
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| CN109298236B (en) * | 2018-11-15 | 2021-05-07 | 中电科思仪科技股份有限公司 | Measuring method of microwave power measurement linear bias meter |
| CN109595787A (en) * | 2019-01-14 | 2019-04-09 | 广东盈科电子有限公司 | A kind of automatic adjustment controlling means of the Thermostatic water heaters that temperature drift is calibrated automatically and the Thermostatic water heaters |
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| CN1825778A (en) * | 2005-02-26 | 2006-08-30 | Lg电子株式会社 | Power compensation in a mobile station |
| CN101394151A (en) * | 2008-10-14 | 2009-03-25 | 福建先创电子有限公司 | Automatic gain compensation and linear control method and device for power amplifier |
| CN103592480A (en) * | 2013-11-04 | 2014-02-19 | 中国电子科技集团公司第四十一研究所 | Microwave power probe temperature compensation device based on USB interface |
| CN103630756A (en) * | 2013-12-09 | 2014-03-12 | 北京无线电计量测试研究所 | High-power microwave pulse signal calibration method |
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| CN105450183A (en) * | 2014-07-31 | 2016-03-30 | 展讯通信（上海）有限公司 | Temperature compensation method and device for linear power amplifier |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558895A (en) * | 2013-10-28 | 2014-02-05 | 中国电子科技集团公司第四十一研究所 | Variable power reference source circuit with national standard and design method |
| CN105259528B (en) * | 2015-11-11 | 2019-04-30 | 中国电子科技集团公司第四十一研究所 | A kind of the internal calibration circuit and calibration method of microwave power probe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1825778A (en) * | 2005-02-26 | 2006-08-30 | Lg电子株式会社 | Power compensation in a mobile station |
| CN101394151A (en) * | 2008-10-14 | 2009-03-25 | 福建先创电子有限公司 | Automatic gain compensation and linear control method and device for power amplifier |
| CN103592480A (en) * | 2013-11-04 | 2014-02-19 | 中国电子科技集团公司第四十一研究所 | Microwave power probe temperature compensation device based on USB interface |
| CN103630756A (en) * | 2013-12-09 | 2014-03-12 | 北京无线电计量测试研究所 | High-power microwave pulse signal calibration method |
| CN105224002A (en) * | 2014-06-30 | 2016-01-06 | 展讯通信（上海）有限公司 | Radio system temperature compensation, device and mobile terminal |
| CN105450183A (en) * | 2014-07-31 | 2016-03-30 | 展讯通信（上海）有限公司 | Temperature compensation method and device for linear power amplifier |
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