CN203368444U - Multi-range self-protection AD signal acquisition device - Google Patents
Multi-range self-protection AD signal acquisition device Download PDFInfo
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- CN203368444U CN203368444U CN 201320420198 CN201320420198U CN203368444U CN 203368444 U CN203368444 U CN 203368444U CN 201320420198 CN201320420198 CN 201320420198 CN 201320420198 U CN201320420198 U CN 201320420198U CN 203368444 U CN203368444 U CN 203368444U
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- 230000003321 amplification Effects 0.000 claims abstract description 35
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 35
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
The utility model discloses a multi-range self-protection AD signal acquisition device. The multi-range self-protection AD signal acquisition device comprises an operational amplifier follower, an AD converter containing an AD interface, and an amplifying circuit. The amplifying circuit is connected between the operational amplifier follower and the AD interface. A protection circuit which can be used to protect equipment timely is further connected between the amplifying circuit and the AD interface. The multi-range self-protection AD signal acquisition device of the utility model has the following advantages that, data of each range at a sampling point are measured at the same time, multi-range measurement adopts the multistage amplification technology, simultaneous acquisition is performed, resistor or channel switching does not need to be performed, disadvantages of poor realtime performance and inconsistent accuracy caused in the sampling resistor switching process can be avoided, advantages of good realtime performance and consistent accuracy can be realized; both of a primary circuit and a secondary circuit are adopted, the stability can be enhanced, the advantages of good stability can be realized; and equipment are protected by an upper and lower limit protection circuit timely, so the advantage of good reliability can be realized.
Description
Technical field
The utility model relates to a kind of AD signal pickup assembly, relates in particular to a kind of multrirange self-shield AD signal pickup assembly.
Background technology
The AD acquisition applications is very extensive, and various AD conversions are also very many, and most of single-chip microcomputers also adopt multichannel AD interface.Existing multi-range measurement technology adopts the mode of switch sampling resistance, and main technical schemes is: 1, switch sampling resistance; 2, a plurality of sampling resistor series multistage dividing potential drops; 3, adjust gain.
Above technical scheme exists a lot of deficiencies: 1, switch sampling resistance, and real-time is bad, precision is inconsistent, poor stability, can't realize the hard protection to bound; 2, a plurality of sampling resistor series multistage dividing potential drops because each dividing point voltage phase difference is larger, can not enter the AD ALT-CH alternate channel simultaneously, need switching AD ALT-CH alternate channel, so real-time are bad, precision is inconsistent, poor stability; 3, adjusting gain also needs convert resistance, so real-time is bad, precision is inconsistent, poor stability.
Summary of the invention
In order to overcome the above-mentioned deficiency of prior art, the utility model provides following technical scheme.
A kind of multrirange self-shield AD signal pickup assembly; it is characterized in that; it is characterized in that; comprise an amplifier follower, AD converter, an amplifying circuit containing the AD interface; described amplifying circuit is connected between amplifier follower and AD interface, also is connected with the protective circuit of timely protection equipment between amplifying circuit and AD interface.
As further improvement of the utility model, it is characterized in that, described amplifying circuit comprises main amplification module and secondary amplification module, described main amplification module is main N level amplification module units in series structure, described secondary amplification module is time N level amplification module units in series structure, each secondary amplification module unit is connected with the AD interface respectively, and N is greater than 2 natural number.
As further improvement of the utility model; it is characterized in that; described protective circuit comprises upscale protection circuit and downscale protection circuit; described upscale protection circuit is connected between main first order amplification module unit and AD interface, and described downscale protection circuit is connected between main N level amplification module unit and AD interface.
As further improvement of the utility model, it is characterized in that, the input voltage range VICR of described amplifier follower equals the interface upper limit.
The beneficial effects of the utility model are: sampled point, each range data are measured simultaneously, multi-range measurement adopts multistage amplification, gather simultaneously, do not carry out convert resistance or passage, the real-time of having brought while having avoided switching to gather resistance is bad, precision is inconsistent, has obtained that real-time is good, the consistent high beneficial effect of precision; Adopt the primary and secondary two-way, increase stability, stability is high; The bound protective circuit is protected equipment in time, and reliability is high.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is the utility model preferred implementation.
Embodiment
Below in conjunction with accompanying drawing, concrete enforcement of the present utility model is described in detail.
Fig. 1 is the theory diagram of the utility model preferred implementation.As shown in Figure 1, this multrirange self-shield AD signal pickup assembly comprises amplifier follower and multistage amplification module, multistage amplification module is series between amplifier follower and AD interface, multistage amplification module is divided into the primary and secondary two-way, the main amplification module is by main one-level amplification module unit, main secondary amplification module unit ... main N level amplification module units in series forms, secondary amplification module is by inferior one-level amplification module unit, inferior secondary amplification module unit ... inferior N level amplification module units in series forms, each secondary amplification module unit is connected with the AD interface respectively, be connected with the upscale protection circuit between main one-level amplification module unit and AD interface, be connected with the downscale protection circuit between main N level amplification module unit and AD interface.
When the utility model is implemented, analog input, through the amplifier follower, improves input impedance, giving the primary and secondary one-level and amplify, if main one-level gain amplifier is 1, is 10 from the one-level gain amplifier, main secondary gain amplifier is 100, and inferior secondary gain amplifier is that range is alternately adjusted in 100 primary and secondary secondarys amplifications.
The protection of bound protective circuit is controlled: analog input is greater than in limited time, and the upscale protection circuit sends control signal; Analog input is less than down in limited time, and the downscale protection circuit sends control signal.
The AD interface protection, the input voltage range VICR of amplifier follower should equal or be slightly less than the AD interface upper limit.
Claims (5)
1. a multrirange self-shield AD signal pickup assembly; it is characterized in that; comprise an amplifier follower, AD converter, an amplifying circuit containing the AD interface; described amplifying circuit is connected between amplifier follower and AD interface, also is connected with the protective circuit of timely protection equipment between amplifying circuit and AD interface.
2. multrirange self-shield AD signal pickup assembly according to claim 1; it is characterized in that; described amplifying circuit comprises main amplification module and secondary amplification module; described main amplification module is main N level amplification module units in series structure; described secondary amplification module is time N level amplification module units in series structure; each secondary amplification module unit is connected with the AD interface respectively, and N is greater than 2 natural number.
3. multrirange self-shield AD signal pickup assembly according to claim 1 and 2; it is characterized in that; described protective circuit comprises upscale protection circuit and downscale protection circuit; described upscale protection circuit is connected between main first order amplification module unit and AD interface, and described downscale protection circuit is connected between main N level amplification module unit and AD interface.
4. multrirange self-shield AD signal pickup assembly according to claim 1 and 2, is characterized in that, the input voltage range VICR of described amplifier follower equals the AD interface upper limit.
5. multrirange self-shield AD signal pickup assembly according to claim 3, is characterized in that, the input voltage range VICR of described amplifier follower equals the AD interface upper limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320420198 CN203368444U (en) | 2013-07-16 | 2013-07-16 | Multi-range self-protection AD signal acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320420198 CN203368444U (en) | 2013-07-16 | 2013-07-16 | Multi-range self-protection AD signal acquisition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203368444U true CN203368444U (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320420198 Expired - Fee Related CN203368444U (en) | 2013-07-16 | 2013-07-16 | Multi-range self-protection AD signal acquisition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203368444U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569700A (en) * | 2015-02-03 | 2015-04-29 | 上海观源信息科技有限公司 | Equipment power consumption acquiring device with various interfaces |
| CN106526075A (en) * | 2016-10-10 | 2017-03-22 | 中国神华能源股份有限公司 | Flue gas monitoring method and apparatus |
| CN106773952A (en) * | 2016-12-14 | 2017-05-31 | 北京三快在线科技有限公司 | A kind of signal sample circuit, signal sampling device and signal sampling method |
| CN110988089A (en) * | 2019-12-16 | 2020-04-10 | 江西农业大学 | Wide-range digital electrochemical analysis device and detection method |
-
2013
- 2013-07-16 CN CN 201320420198 patent/CN203368444U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569700A (en) * | 2015-02-03 | 2015-04-29 | 上海观源信息科技有限公司 | Equipment power consumption acquiring device with various interfaces |
| CN106526075A (en) * | 2016-10-10 | 2017-03-22 | 中国神华能源股份有限公司 | Flue gas monitoring method and apparatus |
| CN106773952A (en) * | 2016-12-14 | 2017-05-31 | 北京三快在线科技有限公司 | A kind of signal sample circuit, signal sampling device and signal sampling method |
| CN106773952B (en) * | 2016-12-14 | 2019-11-29 | 北京三快在线科技有限公司 | A kind of signal sample circuit, signal sampling device and signal sampling method |
| CN110988089A (en) * | 2019-12-16 | 2020-04-10 | 江西农业大学 | Wide-range digital electrochemical analysis device and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Five Ji'nan province high tech Zone, Shandong Road, No. 2711, No. 250101 Patentee after: SHANDONG VANFORM HIGH ENERGY PHYSICS TECHNOLOGY Co.,Ltd. Address before: Five Ji'nan province high tech Zone, Shandong Road, No. 2711, No. 250101 Patentee before: SHANDONG VANFORM HIGH ENERGY PHYSICS TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |
|
| CX01 | Expiry of patent term | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: Expiration and Termination of 39 Volume 3101 Patent on August 1, 2023 Number: 31-01 Volume: 39 |
|
| CU01 | Correction of utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |