CN102495562A - Sampling circuit for SR1000 paperless recording instrument - Google Patents
Sampling circuit for SR1000 paperless recording instrument Download PDFInfo
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- CN102495562A CN102495562A CN2011104527693A CN201110452769A CN102495562A CN 102495562 A CN102495562 A CN 102495562A CN 2011104527693 A CN2011104527693 A CN 2011104527693A CN 201110452769 A CN201110452769 A CN 201110452769A CN 102495562 A CN102495562 A CN 102495562A
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- operational amplifier
- circuit
- recording instrument
- sampling
- signals
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Abstract
The invention relates to a sampling circuit for an SR1000 paperless recording instrument. A singlechip controls three multi-channel analogue signal switches to acquire various signals in field, and the acquired signals are transmitted to an operational amplifier. The singlechip also controls another multi-channel analogue signal switch to regulate the amplifier gain of the operational amplifier. The acquired signals are conditioned by the operational amplifier, and the conditioned signals are transmitted to an analogue/digital (A/D) conversion circuit for A/D conversion. The signals of different types of sampling objects can be conveniently conditioned by the analogue signal switches with low cost, so that the usage of the operational amplifier with high cost is reduced. The amplifier gain is controllable, so that the variation degree of a sampling range is increased, the universality of the circuit is improved, and difficulty in subsequent circuit design and device type selection is decreased. A signal conditioning part can realize repeated superposition, so that the circuit can realize the all input signal sampling of three channels maximally.
Description
Technical field
The present invention relates to a kind of sample circuit, particularly a kind of SR1000 recording instrument without paper table sample circuit.
Background technology
Along with the continuous intensification of automaticity in the process industry, the user continues to increase the supervision of procedure parameter, the demand of control.Recording instrument without paper be widely used in industries such as electric power, metallurgy, petrochemical industry, light textile, food, medicine, and the signal sample circuit in the recording instrument without paper directly has influence on the performance of registering instrument as the data record unit of whole process.
Often to the sensor specialized designs of independent kind, versatility is not high, and can only realize the sampling function of single passage for traditional signal sample circuit.
Summary of the invention
It is low to The present invention be directed to now traditional signal sample circuit versatility; The problem that sampling channel is single has proposed the sample circuit that a kind of SR1000 recording instrument without paper designs, and can switch through Single-chip Controlling to realize same circuit; The coupling all the sensors; And can be extended to maximum three passages, product had be different from the characteristic of like product, increase product competitiveness with this.
Technical scheme of the present invention is: a kind of SR1000 recording instrument without paper table sample circuit; Three multi-channel analog signal switches of Single-chip Controlling are gathered the various signals at scene; Gather the back signal and send operational amplifier; Single-chip Controlling multi-channel analog signal switch is regulated the amplifier gain of operational amplifier simultaneously, and acquired signal send the A/D change-over circuit to carry out analog to digital conversion after carrying out signal condition through operational amplifier.
The input of the output termination multi-channel analog signal switch of said operational amplifier, the output of multi-channel analog signal switch connect the input of operational amplifier and bear, the amplifier gain of adjustment operational amplifier.
Said multi-channel analog signal switch is selected the CD4051 chip for use.
Beneficial effect of the present invention is: the sample circuit of SR1000 recording instrument without paper design of the present invention, through the lower analog switch of price, can carry out signal condition to dissimilar samplings to picture easily, and reduced use to the higher operational amplifier of price.The controlled sampling range change degree that makes of amplifier gain increases, and has increased the circuit versatility, has reduced the difficulty of subsequent conditioning circuit design and parts selection.The signal condition part can repeat stack, makes circuit can realize three-channel full input signal sampling at most.
Description of drawings
Fig. 1 is the sample circuit theory diagram of SR1000 recording instrument without paper design of the present invention;
Fig. 2 is multi-channel analog switch circuit figure in the sample circuit of SR1000 recording instrument without paper design of the present invention;
Fig. 3 is controlled gain amplifier circuit diagram in the sample circuit of SR1000 recording instrument without paper design of the present invention;
Fig. 4 is A/D change-over circuit figure in the sample circuit of SR1000 recording instrument without paper design of the present invention.
Embodiment
The sample circuit theory diagram of SR1000 recording instrument without paper design as shown in Figure 1; 1,2,3 pairs of on-site signals of single-chip microcomputer 5 three multi-channel analog signal switches of control are gathered; Gather the back signal and send operational amplifier; Single-chip microcomputer 5 control multi-channel analog signal switches 4 are regulated the amplifier gain of operational amplifier simultaneously, after acquired signal is carried out signal condition through operational amplifier, send A/D change-over circuit 6 to carry out analog to digital conversion.Multi-channel analog switch circuit figure as shown in Figure 2 selects CD4051 octuple analog switch chip here for use, and acquired signal is sent into from the IN1A end; Controlled gain amplifier circuit diagram as shown in Figure 3, the input of the output 6 corner connection multi-channel analog signal switches 4 of operational amplifier, the output of multi-channel analog signal switch 4 connect the input of operational amplifier and bear, the amplifier gain of adjustment operational amplifier; A/D change-over circuit figure as shown in Figure 4.
Through Single-chip Controlling analog switch switch sampling type and passage, it is suitable that gain amplifier matees to select simultaneously, obtains the corresponding code value of current voltage by the A/D conversion chip at last.Through the lower analog switch of price, can carry out signal condition to dissimilar samplings to picture easily, reduced use to the higher operational amplifier of price.Simultaneously, the controlled sampling range change degree that makes of amplifier gain increases, and has increased the circuit versatility, has reduced the difficulty of subsequent conditioning circuit design and parts selection.Select through the suitable filters parameter, realize the balance of stronger interference inhibition and step signal response.Through rational PCB topological design the stability of circuit and anti-harassing and wrecking ability are improved greatly at last.
To different industry spot signals, designed the sample circuit of polytype signal inputs such as ability compatibility standard voltage, normalized current, thermal resistance, thermopair.The circuit versatility is high, can conveniently be transplanted in the instrument of different platform, can realize three-channel full input signal sampling at most.Simultaneously thermal stability is high, can be under 0-50 ℃ of environment operate as normal, nonlinearity erron is less than 0.1%.Through circuit parameter ground choose reasonable, circuit is had under the strong situation about suppressing (power frequency is greater than 55dB) interference, sampling rate is not less than 10 times/second.
Claims (3)
1. SR1000 recording instrument without paper table sample circuit; It is characterized in that; Three multi-channel analog signal switches of Single-chip Controlling are gathered the various signals at scene, gather the back signal and send operational amplifier, and Single-chip Controlling multi-channel analog signal switch is regulated the amplifier gain of operational amplifier simultaneously; Acquired signal send the A/D change-over circuit to carry out analog to digital conversion after carrying out signal condition through operational amplifier.
2. according to the said SR1000 recording instrument without paper of claim 1 table sample circuit; It is characterized in that; The input of the output termination multi-channel analog signal switch of said operational amplifier, the output of multi-channel analog signal switch connect the input of operational amplifier and bear, the amplifier gain of adjustment operational amplifier.
3. according to the said SR1000 recording instrument without paper of claim 1 table sample circuit, it is characterized in that said multi-channel analog signal switch is selected the CD4051 chip for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104527693A CN102495562A (en) | 2011-12-30 | 2011-12-30 | Sampling circuit for SR1000 paperless recording instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104527693A CN102495562A (en) | 2011-12-30 | 2011-12-30 | Sampling circuit for SR1000 paperless recording instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102495562A true CN102495562A (en) | 2012-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104527693A Pending CN102495562A (en) | 2011-12-30 | 2011-12-30 | Sampling circuit for SR1000 paperless recording instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102495562A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597348A (en) * | 2015-01-19 | 2015-05-06 | 浙江中控自动化仪表有限公司 | Method and system for detecting input signal type of universal input end |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09133714A (en) * | 1995-09-07 | 1997-05-20 | Yokogawa Electric Corp | Recording system |
| CN201318952Y (en) * | 2008-12-01 | 2009-09-30 | 上海神开石油化工装备股份有限公司 | On-line paperless recorder |
| CN201336049Y (en) * | 2008-12-04 | 2009-10-28 | 厦门安东电子有限公司 | Distributed paperless recorder device |
| CN102236326A (en) * | 2010-04-27 | 2011-11-09 | 魏中天 | Paperless recorder |
-
2011
- 2011-12-30 CN CN2011104527693A patent/CN102495562A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09133714A (en) * | 1995-09-07 | 1997-05-20 | Yokogawa Electric Corp | Recording system |
| CN201318952Y (en) * | 2008-12-01 | 2009-09-30 | 上海神开石油化工装备股份有限公司 | On-line paperless recorder |
| CN201336049Y (en) * | 2008-12-04 | 2009-10-28 | 厦门安东电子有限公司 | Distributed paperless recorder device |
| CN102236326A (en) * | 2010-04-27 | 2011-11-09 | 魏中天 | Paperless recorder |
Non-Patent Citations (2)
| Title |
|---|
| 王悦: "彩色无纸记录仪的设计", 《石油化工自动化》, no. 4, 30 April 2006 (2006-04-30), pages 84 - 85 * |
| 葛红军等: "新型无纸记录仪的设计方法", 《黑龙江工程学院学报》, vol. 16, no. 4, 31 December 2002 (2002-12-31), pages 51 - 53 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597348A (en) * | 2015-01-19 | 2015-05-06 | 浙江中控自动化仪表有限公司 | Method and system for detecting input signal type of universal input end |
| CN104597348B (en) * | 2015-01-19 | 2017-09-12 | 浙江中控自动化仪表有限公司 | A kind of method and system for the input signal types for detecting omnipotent input |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD. Free format text: FORMER OWNER: SHANGHAI AUTOMATIC INDUSTRUMENT AND METER CO LTD Effective date: 20150612 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150612 Address after: Zhabei District Shanghai City, No. 191 West Guangzhong road 200072 No. 7 Applicant after: Shanghai instrument and meter for automation company limited Address before: 200233, No. 41 Rainbow Road, Shanghai, Xuhui District Applicant before: Shanghai Automatic Industrument and Meter Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120613 |