CN102571089A - Analog-to-digital conversion/digital-to-analog conversion self-calibration method and control system applying same - Google Patents
Analog-to-digital conversion/digital-to-analog conversion self-calibration method and control system applying same Download PDFInfo
- Publication number
- CN102571089A CN102571089A CN2011104603502A CN201110460350A CN102571089A CN 102571089 A CN102571089 A CN 102571089A CN 2011104603502 A CN2011104603502 A CN 2011104603502A CN 201110460350 A CN201110460350 A CN 201110460350A CN 102571089 A CN102571089 A CN 102571089A
- Authority
- CN
- China
- Prior art keywords
- port
- selector switch
- dac
- adc
- processor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The embodiment of the invention discloses an analog-to-digital converter/digital-to-analog converter self-calibration method and a control system applying the method so as to solve the problems of large workload and low efficiency existing in the existing calibration method. The system comprises a processor, a DAC (digital-to-analog converter), an ADC (analog-to-digital converter), a controlled device and a selective switch; the method comprises the following steps that the system is electrified and controls the selective switch, so that the system is in a calibration mode; the processor inputs digital quantity input signals into the DAC, and controls the DAC and the ADC to sequentially execute signal conversion, then actual digital quantity output signals are outputted by the ADC; the processor acquires and correspondingly records the digital quantity input signals and the actual digital quantity output signals; the processor calculates and obtains theoretical digital output signals according to the digital quantity input signals, the reference voltage of the DAC and the reference voltage of the ADC; the processor analyzes the digital quantity input signals, the actual digital quantity output signals and the theoretical digital quantity output signals so as to obtain corrected parameters of the ADC and the DAC; and the processor corrects the ADC and the DAC according to the corrected parameters.
Description
Technical field
The present invention relates to analog-to-digital conversion and digital-to-analogue conversion technical field, relate in particular to the control system of analog-to-digital conversion and digital-to-analogue conversion method for self-calibrating and this method of application.
Background technology
In the existing control system; A kind of control system that has analog-to-digital conversion module (ADC) and D/A converter module (DAC) is simultaneously arranged; As shown in Figure 1, this system comprises processor 101, D/A converter module (DAC) 102, analog-to-digital conversion module (ADC) 103, controlled device 104.The course of work of this system is following: processor 101 sends digital quantity control signal Data1 to DAC102, and DAC102 converts Data1 into analog quantity output signals Ui1 under the control of processor, and outputs to controlled device 104, with the control controlled device; ADC103 gathers the analog quantity Ui2 of controlled device 104 feedbacks under the control of processor 101; Be translated into digital quantity feedback signal Data2 and send processor 101 to; Processor 101 carries out a series of data processing according to Data2 and built-in algorithm; The new digital quantity control signal Data1 of controlled better effects if realizes the closed-loop control to external equipment.In order to eliminate the closed-loop control error of said system, improve control precision, need calibrate system, wherein mainly be calibration to DAC and ADC.
The calibration steps that prior art adopts is for calibrating separately DAC and ADC respectively.At first DAC is calibrated: processor is got a little Data1 according to preset collection point successively and is imported DAC, utilizes oscilloscope or relevant high precision measuring instrument to measure the analog quantity output signals Ui1 of DAC, and Ui1 is carried out record as real output value; According to the la tension de reference Uref est 1 and maximum input level D1 of DAC, utilize DAC conversion formula D1/Uref1=Data1/Ui1 ', calculate the corresponding theoretical output valve Ui1 ' in each preset collection point; With Ui1 with Ui1 ' compares and corresponding process of fitting treatment, the control output Ui1 that revises DAC is to reach the requirement that needs.Then ADC is calibrated: outside source is to ADC input analog voltage signal Ui2, and processor is got a little Ui2 according to preset collection point, reads and write down corresponding digital quantity output valve (the being real output value) Data2 in each preset collection point; According to the la tension de reference Uref est 2 and maximum output valve D2 of ADC, utilize ADC conversion formula Uref2/D2=Ui2/Data2 ', calculate the corresponding theoretical output valve Data2 ' in each preset collection point; With the Data2 ' of correspondence with Data2 compares and corresponding data processing, according to the conversion input Ui2 of data processed result correction ADC to reach the requirement of needs.
In the above-mentioned calibration steps, data record and data processing are accomplished by manual operation, cause that its workload is big, efficient is low.
Summary of the invention
In view of this, the invention provides the control system of analog-to-digital conversion and digital-to-analogue conversion method for self-calibrating and this method of application, to solve big, the inefficient problem of workload that prior art exists.
For realizing above-mentioned purpose, the present invention provides following technical scheme:
A kind of analog-to-digital conversion and digital-to-analogue conversion method for self-calibrating, based on a kind of control system, said system comprises processor, D/A converter module DAC, analog-to-digital conversion module ADC, controlled device and selector switch; Wherein,
The output of said processor is connected with the input of said DAC, and the input of said controller is connected with the output of said ADC;
Said selector switch is used to change the connection status between said DAC, ADC and the controlled device, makes said system be in calibration mode or control model; Wherein,
First port of said selector switch is connected with the output of said DAC; Second port of said selector switch is connected with said ADC input; The 3rd port of said selector switch is connected with the input of said controlled device, and the 4th port of said selector switch is connected with the output of said controlled device;
When said first port is connected with said second port, said first port and said the 3rd port break off, and said second port is during with the disconnection of said the 4th port, and said system is in calibration mode; When said first port and said second port break off, and said first port is connected with said the 3rd port, and said second port is when being connected with said the 4th port, and said system is in control model;
Said method comprises step:
Said system powers on, and controls said selector switch, makes said system be in calibration mode;
Said processor is input to said DAC with the digital quantity input signal, and controls said DAC and ADC carries out conversion of signals successively, by ADC output real figure amount output signal;
Said digital quantity input signal of said processor collection and corresponding record and real figure amount output signal;
Said processor calculates theoretical digital quantity output signal according to the reference voltage of said digital quantity input signal, said DAC and the reference voltage of said ADC;
Said processor is analyzed said digital quantity input signal, real figure amount output signal and theoretical digital quantity output signal, draws the corrected parameter of said ADC and DAC;
Said processor is revised said ADC and DAC according to said corrected parameter.
Preferably, said processor also comprises after according to said corrected parameter said ADC and DAC being revised: control said selector switch, make said system be in control model.
Preferably, the said selector switch of said control comprises through the said selector switch of the automatic control of said processor.
Preferably, the said selector switch of said control comprises the said selector switch of manual control.
Preferably, said digital quantity input signal comprises the digital quantity input signal that said processor is provided with in advance.
A kind of control system comprises: controlled device, D/A converter module DAC, analog-to-digital conversion module ADC, processor and selector switch; Wherein,
The output of said processor is connected with the input of said DAC, and the input of said controller is connected with the output of said ADC;
Said selector switch is used to change the connection status between said DAC, ADC and the controlled device, makes said system be in calibration mode or control model; Wherein,
First port of said selector switch is connected with the output of said DAC; Second port of said selector switch is connected with said ADC input; The 3rd port of said selector switch is connected with the input of said controlled device, and the 4th port of said selector switch is connected with the output of said controlled device;
When said first port is connected with said second port, said first port and said the 3rd port break off, and said second port is during with the disconnection of said the 4th port, and said system is in calibration mode; When said first port and said second port break off, and said first port is connected with said the 3rd port, and said second port is when being connected with said the 4th port, and said system is in control model;
Preferably, the control that is included in said processor of said selector switch realizes down the diverter switch switched between calibration mode and the control model.
Preferably, said selector switch comprises the toggle switch that switches through between manual operation realization calibration mode and the control model.
Can find out from above-mentioned technical scheme; Analog-to-digital conversion provided by the invention and digital-to-analogue conversion method for self-calibrating; Utilize the selector switch control system to be set to calibration mode; The analog quantity output that is DAC only directly is connected with the analog quantity input of ADC, makes the analog quantity input signal Ui2 of the analog quantity output signals Ui1 of DAC as ADC, and forms the loop jointly with processor; Under the control of processor; Digital quantity input signal Data1 is converted to real output value Data2 through DAC and ADC successively; The value of Data1 and Data2 is gathered and write down to processor; According to the la tension de reference Uref est 1 of Data1, DAC and la tension de reference Uref est 2 theory of computation output valve Data2 ' of ADC, draw the corrected parameter value through Data1, Data2 and Data2 ' being compared analyze, and DAC and ADC are revised by said corrected parameter.In the above-mentioned method for self-calibrating; Record and processing to data such as the conversion and control of DAC and ADC and Data1, Data2, Data2 '; All accomplish by processor; Do not need by equipment such as oscilloscopes, do not need operating personnel's intervention, thereby reduced operating personnel's workload, improved operating efficiency system calibration.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The schematic diagram of Fig. 1 for having the control system of DAC and ADC simultaneously in the prior art;
The analog-to-digital conversion that Fig. 2 provides for the embodiment of the invention and the method flow diagram of digital-to-analogue conversion method for self-calibrating;
The control system schematic diagram of the application method for self-calibrating shown in Figure 2 that Fig. 3 provides for the embodiment of the invention;
Another control system schematic diagram of the application method for self-calibrating shown in Figure 2 that Fig. 4 provides for the embodiment of the invention;
Another control system schematic diagram of the application method for self-calibrating shown in Figure 2 that Fig. 5 provides for the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention provides a kind of analog-to-digital conversion and digital-to-analogue conversion method for self-calibrating; This method is applied to a kind of control system; With reference to Fig. 3, said system comprises processor 101, D/A converter module DAC102, analog-to-digital conversion module ADC103, controlled device 104 and selector switch 105; Wherein,
The digital signal output end of processor 101 is connected with the input of DAC102, and the input of controller 101 is connected with the output of ADC103;
First port of above-mentioned selector switch 105 is connected with the output of DAC102; Second port of selector switch 105 is connected with the AD103C input; The 3rd port of selector switch 105 is connected with the input of controlled device 104, and the 4th port of selector switch 105 is connected with the output of controlled device 104;
When first port of selecting switch 105 is connected with second port of selector switch 105; And first port of selector switch 105 and the 3rd port of selector switch 105 break off; And when second port of selector switch 105 and the 4th port of selector switch 105 broke off, system was in calibration mode; Second port disconnection when first port of selecting switch 105 and selector switch 105; And first port of selector switch 105 is connected with the 3rd port of selector switch 105; And when second port of selector switch 105 was connected with the 4th port of selector switch 105, system was in control model.
With reference to Fig. 2, Fig. 3, analog-to-digital conversion that the embodiment of the invention provides and digital-to-analogue conversion method for self-calibrating comprise step at least:
S1: system powers on, and control selector switch 105 makes said system be in calibration mode;
Annexation by above-mentioned selector switch 105 each port can know that under calibration mode, the analog quantity output signals Ui1 of DAC102 does not import controlled device 104, but directly imports ADC103 as Ui2.
S2: processor 101 is input to DAC102 with the digital quantity input signal, and controls said DAC and ADC carries out conversion of signals successively, by ADC output real figure amount output signal;
The digital quantity input signal Data1 input DAC102 that processor will be used to calibrate; And to the DAC102 BUS1 that transmits control signal; Control DAC102 converts digital quantity input signal Data1 into corresponding analog quantity output signals Ui1 output, and with the analog quantity input signal Ui2 input ADC103 of Ui1 as ADC103;
S3: processor 101 is gathered and corresponding record digital quantity input signal Data1 and real figure amount output signal Data2;
S4: processor 101 calculates theoretical digital quantity output signal Data2 ' according to the la tension de reference Uref est 1 of digital quantity input signal Data1, DAC and the la tension de reference Uref est 2 of ADC;
Known; The conversion formula of DAC is D1/Uref1=Data1/Ui1, and the conversion formula of ADC is that (D1 is the maximum input level of DAC to Uref2/D2=Ui2/Data2, and D2 is the maximum output valve of ADC; D1, D2 are known as the basic parameter of DAC and ADC); The reference voltage relation of DAC and ADC is Uref1=K*Uref2, and Ui1=Ui2 under the calibration mode is so can calculate corresponding theoretical output valve the Data2 '=Data1*K*D2/D1 of digital quantity input signal Data1 by processor.
S5: 101 pairs of digital quantity input signals of processor Data1, real figure amount output signal Data2 and theoretical digital quantity output signal Data2 ' analyze, and draw the corrected parameter of ADC103 and DAC102;
S6: processor 101 is revised ADC103 and DAC102 according to above-mentioned corrected parameter.
Need to prove; Adopt S1～S6 to carry out the execution sequence of the not strict qualification this method of label embodiment to above-mentioned steps; And be a kind of preferred sequence; The embodiment of other execution sequences that those skilled in the art obtain under the prerequisite of not making creative work belongs to protection scope of the present invention.
Learn from said method; Analog-to-digital conversion that the embodiment of the invention provides and digital-to-analogue conversion method for self-calibrating; Utilize the selector switch control system to be set to calibration mode, promptly the analog quantity output signals Ui1 of DAC is as the analog quantity input signal Ui2 of ADC, and forms the loop jointly with processor; Under the control of processor; Data1 is converted to real output value Data2 through DAC and ADC successively; The value of Data1 and Data2 is gathered and write down to processor; According to Data1, K (or Uref1 and Uref2) theory of computation output valve Data2 ', draw the corrected parameter value through Data1, Data2 and Data2 ' being compared analyze, and DAC and ADC are revised by said corrected parameter.In the above-mentioned method for self-calibrating; Record and processing to data such as the conversion and control of DAC and ADC and Data1, Data2, Data2 '; All accomplish by processor; Do not need by equipment such as oscilloscopes, do not need operating personnel's intervention, thereby reduced operating personnel's workload, improved operating efficiency system calibration.
In addition, the method for self-calibrating that the embodiment of the invention provides, with the analog quantity output signals of the DAC analog quantity input signal as ADC, processor, DAC and ADC form a calibration loop, thereby have realized the piece calibration to DAC and ADC.With respect to existing single calibrating mode; The embodiment of the invention can not only be accomplished calibration fast, easily, increases work efficiency greatly, has avoided the idealized processing of in the single calibrating mode data being carried out simultaneously; Thereby reduced calibration error, improved calibration accuracy.
In the conventional calibration mode for reducing workload, often to same model or batch chip adopt identical corrected parameter to revise, thereby introduced self error of DAC or ADC chip, reduced calibration accuracy.And DAC and ADC that the method for self-calibrating that the embodiment of the invention provides can use system simultaneously fast, easily calibrate; Thereby can be under the prerequisite that increases workload hardly; Each ADC, DAC to system's current application carry out piece calibration, have improved calibration accuracy.
In other embodiment of the present invention, also comprise step after the foregoing description step S6:
The control selector switch makes system be in control model.
After calibration operation is accomplished; Can system be transferred to control model through selector switch 105; Be between the input of controlled device 104 output and the ADC103 that are serially connected with DAC102; The analog quantity output signals Ui1 of DAC102 no longer directly imports ADC103 as Ui2, but as Ui3 input controlled device, the operation of control controlled device 104; Ui3 converts Ui4 output into after the controlled device effect, and as Ui2 input ADC103.It is thus clear that selector switch 105 has been realized the flexible switching of system between calibration mode and control model.
In other embodiment of the present invention, the described control selector switch of above-mentioned all embodiment comprises through processor and controls or manually control selector switch 105 automatically.
In above-mentioned all embodiment of the present invention, the digital quantity input signal described in the step S2 specifically comprises: according to the control range of DAC102 and ADC103, and the digital quantity signal that is used to calibrate that in processor 101, is provided with in advance.
In addition, the embodiment of the invention also provides a kind of control system, and this system can use the self calibration that said method is realized system.
Referring to Fig. 3, said system comprises controlled device 104, D/A converter module DAC102, analog-to-digital conversion module ADC103, processor 101 and selector switch 105; Wherein,
The digital signal output end of processor 101 is connected with the input of DAC102, and the input of controller 101 is connected with the output of ADC103;
First port of above-mentioned selector switch 105 is connected with the output of DAC102; Second port of selector switch 105 is connected with the AD103C input; The 3rd port of selector switch 105 is connected with the input of controlled device 104, and the 4th port of selector switch 105 is connected with the output of controlled device 104;
When first port of selecting switch 105 is connected with second port of selector switch 105; And first port of selector switch 105 and the 3rd port of selector switch 105 break off; And when second port of selector switch 105 and the 4th port of selector switch 105 broke off, system was in calibration mode; Second port disconnection when first port of selecting switch 105 and selector switch 105; And first port of selector switch 105 is connected with the 3rd port of selector switch 105; And when second port of selector switch 105 was connected with the 4th port of selector switch 105, system was in control model.
As shown in Figure 4, selector switch 105 is selected the diverter switch 105a that system is switched through the control signal BUS3 realization of processor for use between calibration mode and control model.
As shown in Figure 5, in other embodiment of the present invention, the function of the selector switch described in the foregoing description is also available to realize that through manual operation the toggle switch 105b that system is switched realizes between calibration mode and control model.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (8)
1. analog-to-digital conversion and digital-to-analogue conversion method for self-calibrating is characterized in that based on a kind of control system, said system comprises processor, D/A converter module DAC, analog-to-digital conversion module ADC, controlled device and selector switch; Wherein,
The output of said processor is connected with the input of said DAC, and the input of said controller is connected with the output of said ADC;
Said selector switch is used to change the connection status between said DAC, ADC and the controlled device, makes said system be in calibration mode or control model; Wherein,
First port of said selector switch is connected with the output of said DAC; Second port of said selector switch is connected with said ADC input; The 3rd port of said selector switch is connected with the input of said controlled device, and the 4th port of said selector switch is connected with the output of said controlled device;
When said first port is connected with said second port, said first port and said the 3rd port break off, and said second port is during with the disconnection of said the 4th port, and said system is in calibration mode; When said first port and said second port break off, and said first port is connected with said the 3rd port, and said second port is when being connected with said the 4th port, and said system is in control model;
Said method comprises step:
Said system powers on, and controls said selector switch, makes said system be in calibration mode;
Said processor is input to said DAC with the digital quantity input signal, and controls said DAC and ADC carries out conversion of signals successively, by ADC output real figure amount output signal;
Said digital quantity input signal of said processor collection and corresponding record and real figure amount output signal;
Said processor calculates theoretical digital quantity output signal according to the reference voltage of said digital quantity input signal, said DAC and the reference voltage of said ADC;
Said processor is analyzed said digital quantity input signal, real figure amount output signal and theoretical digital quantity output signal, draws the corrected parameter of said ADC and DAC;
Said processor is revised said ADC and DAC according to said corrected parameter.
2. method according to claim 1 is characterized in that, said processor also comprises after according to said corrected parameter said ADC and DAC being revised: control said selector switch, make said system be in control model.
3. method according to claim 2 is characterized in that, the said selector switch of said control comprises through said processor controls said selector switch automatically.
4. method according to claim 2 is characterized in that, the said selector switch of said control comprises the said selector switch of manual control.
5. according to each described method of claim 1～4, it is characterized in that said digital quantity input signal comprises the digital quantity input signal that said processor is provided with in advance.
6. a control system is characterized in that, comprising: controlled device, D/A converter module DAC, analog-to-digital conversion module ADC, processor and selector switch; Wherein,
The output of said processor is connected with the input of said DAC, and the input of said controller is connected with the output of said ADC;
Said selector switch is used to change the connection status between said DAC, ADC and the controlled device, makes said system be in calibration mode or control model; Wherein,
First port of said selector switch is connected with the output of said DAC; Second port of said selector switch is connected with said ADC input; The 3rd port of said selector switch is connected with the input of said controlled device, and the 4th port of said selector switch is connected with the output of said controlled device;
When said first port is connected with said second port, said first port and said the 3rd port break off, and said second port is during with the disconnection of said the 4th port, and said system is in calibration mode; When said first port and said second port break off, and said first port is connected with said the 3rd port, and said second port is when being connected with said the 4th port, and said system is in control model.
7. according to the said system of claim 6, it is characterized in that said selector switch is included in the control of said processor and descends the diverter switch of switching between realization calibration mode and the control model.
8. system according to claim 6 is characterized in that, said selector switch comprises the toggle switch that switches through between manual operation realization calibration mode and the control model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110460350.2A CN102571089B (en) | 2011-12-31 | 2011-12-31 | The control system of analog-to-digital conversion and digital-to-analogue conversion method for self-calibrating and application the method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110460350.2A CN102571089B (en) | 2011-12-31 | 2011-12-31 | The control system of analog-to-digital conversion and digital-to-analogue conversion method for self-calibrating and application the method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102571089A true CN102571089A (en) | 2012-07-11 |
| CN102571089B CN102571089B (en) | 2015-09-30 |
Family
ID=46415669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110460350.2A Active CN102571089B (en) | 2011-12-31 | 2011-12-31 | The control system of analog-to-digital conversion and digital-to-analogue conversion method for self-calibrating and application the method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102571089B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337615A (en) * | 2015-12-01 | 2016-02-17 | 深圳市思榕科技有限公司 | Method for generating high-accuracy DAC voltage |
| CN105607574A (en) * | 2016-02-04 | 2016-05-25 | 天津市英贝特航天科技有限公司 | Adaptive analog quantity calibrating device |
| CN105824266A (en) * | 2015-01-04 | 2016-08-03 | 上海恩艾仪器有限公司 | High-density dynamic analog output card |
| CN105978636A (en) * | 2016-06-21 | 2016-09-28 | 珠海纳睿达科技有限公司 | Two/multi-way DA/AD mutual calibration system and method without reference |
| CN111490786A (en) * | 2020-05-28 | 2020-08-04 | 上海金脉汽车电子有限公司 | Calibration method and device of digital-to-analog converter |
| CN113900006A (en) * | 2021-08-26 | 2022-01-07 | 湖南艾科诺维科技有限公司 | Chip fault testing device, system and method |
| CN117234193A (en) * | 2023-11-10 | 2023-12-15 | 浙江国利信安科技有限公司 | Calibration device for a control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020130715A1 (en) * | 2000-12-07 | 2002-09-19 | Naron Lewis B. | System and method for adjusting separate devices concurrently |
| CN1475812A (en) * | 2003-06-28 | 2004-02-18 | 浙江浙大中控技术有限公司 | Device for automatic correcting measuring module |
| CN101105691A (en) * | 2007-05-23 | 2008-01-16 | 深圳市合信自动化技术有限公司 | Input and output enlargement module and programmable controller system |
-
2011
- 2011-12-31 CN CN201110460350.2A patent/CN102571089B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020130715A1 (en) * | 2000-12-07 | 2002-09-19 | Naron Lewis B. | System and method for adjusting separate devices concurrently |
| CN1475812A (en) * | 2003-06-28 | 2004-02-18 | 浙江浙大中控技术有限公司 | Device for automatic correcting measuring module |
| CN101105691A (en) * | 2007-05-23 | 2008-01-16 | 深圳市合信自动化技术有限公司 | Input and output enlargement module and programmable controller system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105824266A (en) * | 2015-01-04 | 2016-08-03 | 上海恩艾仪器有限公司 | High-density dynamic analog output card |
| CN105337615A (en) * | 2015-12-01 | 2016-02-17 | 深圳市思榕科技有限公司 | Method for generating high-accuracy DAC voltage |
| CN105607574A (en) * | 2016-02-04 | 2016-05-25 | 天津市英贝特航天科技有限公司 | Adaptive analog quantity calibrating device |
| CN105978636A (en) * | 2016-06-21 | 2016-09-28 | 珠海纳睿达科技有限公司 | Two/multi-way DA/AD mutual calibration system and method without reference |
| CN105978636B (en) * | 2016-06-21 | 2019-02-22 | 珠海纳睿达科技有限公司 | Mutual calibration system and method for the double/multichannel DA/AD without basis of reference |
| CN111490786A (en) * | 2020-05-28 | 2020-08-04 | 上海金脉汽车电子有限公司 | Calibration method and device of digital-to-analog converter |
| CN111490786B (en) * | 2020-05-28 | 2023-12-29 | 上海金脉汽车电子有限公司 | Calibration method and device of digital-to-analog converter |
| CN113900006A (en) * | 2021-08-26 | 2022-01-07 | 湖南艾科诺维科技有限公司 | Chip fault testing device, system and method |
| CN117234193A (en) * | 2023-11-10 | 2023-12-15 | 浙江国利信安科技有限公司 | Calibration device for a control system |
| CN117234193B (en) * | 2023-11-10 | 2024-03-01 | 浙江国利信安科技有限公司 | Calibration device for a control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102571089B (en) | 2015-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102571089A (en) | Analog-to-digital conversion/digital-to-analog conversion self-calibration method and control system applying same | |
| CN107390109B (en) | Automatic test platform of high-speed ADC chip and software architecture design method thereof | |
| CN202025338U (en) | Data acquisition card calibration device | |
| CN102413005A (en) | Fault injection method | |
| CN103606812B (en) | A kind of laser optical power self-adaptation control method based on MCU | |
| CN102929321B (en) | Analog quantity conditioning and distributing device with high precision and all-digital calibration | |
| CN100381955C (en) | System and method for calibrating analog signal measuring apparatus automatically | |
| CN103995526A (en) | Power supply controller analog parameter calibration system and method based on CAN buses | |
| CN101603838B (en) | Intelligent transducer and calibration method thereof | |
| CN204964720U (en) | Multiway switch power module centralized monitoring device that area keeps apart | |
| CN101859119B (en) | Display instrument with controllable amplifier gain | |
| CN215263701U (en) | Test calibration system of precision power supply | |
| CN208079047U (en) | A kind of analog signal generator monitoring circuit | |
| CN209659300U (en) | Communication device and its receiving unit and transmission unit | |
| CN105425663B (en) | Analog quantity output signals readback channel real-time calibration system and method based on FPGA | |
| CN201294374Y (en) | APD drive circuit with over current protection and controllable driving voltage | |
| CN204926765U (en) | Automatic regulating electrical resistance's digital regulation resistance | |
| CN207819763U (en) | A kind of multichannel adjustable DC is for electric installation | |
| TWI692210B (en) | Communication device | |
| CN102064466A (en) | High-power laser power supply control system and method | |
| CN103344800B (en) | Program-control electronic load for relay protection | |
| CN204423221U (en) | The accurate signal source of self-correcting without the need to temperature compensation | |
| CN205725707U (en) | A kind of AD based on embedded system samples self-correcting device | |
| CN206759414U (en) | Single-ended analog input interface circuit | |
| CN206759416U (en) | Difference type analog input interface circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liang Xuejun Inventor after: Xu Wangyang Inventor before: Xu Wangyang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XU WANGYANG TO: LIANG XUEJUN XU WANGYANG |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |