CN205232200U - Multrirange signal pickup assembly - Google Patents
Multrirange signal pickup assembly Download PDFInfo
- Publication number
- CN205232200U CN205232200U CN201521132698.9U CN201521132698U CN205232200U CN 205232200 U CN205232200 U CN 205232200U CN 201521132698 U CN201521132698 U CN 201521132698U CN 205232200 U CN205232200 U CN 205232200U
- Authority
- CN
- China
- Prior art keywords
- signal
- multrirange
- pickup assembly
- functional module
- signal pickup
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a multrirange signal pickup assembly relates to signal detection area. A multrirange signal pickup assembly contains the follower, multi -stage amplifiers circuit, anti -aliasing filter ware, the synchronous AD converter of multichannel, automatic range functional module and digital output interface. The follower is connected between signal input and multi -stage amplifiers circuit, automatic range functional module is realized by FPGA or CPLD. The utility model discloses an implementation scheme is, through carry out enlargeing of different multiples to incoming signal to carry out synchronous sampling to different the magnification's signal, sampling back at every turn corresponds the data of passageway by the best the magnification of automatic range function module choice, thereby makes not that the collection of equidimension signal can both obtain higher precision, has improved measuring device's dynamic and real -time.
Description
Technical field
The utility model relates to a kind of signal pickup assembly, particularly relates to a kind of multrirange signal pickup assembly.
Background technology
In commercial Application, the signal of ± 5v full scale is very common, but signal also may only have several mV in some cases.During by ADC sampling large-signal, higher precision can be obtained, but, for small-signal, if directly to its sampling, be difficult to obtain larger precision, need could improve sampling precision to its amplification, obtain larger dynamic range.Existing multi-range measurement major programme is: 1, manual switchover range; 2, control programmable amplifier by controller and realize dynamic gain adjustment.
Above technical scheme exists a lot of not enough: 1, manual switchover signal gain, needs labor intensive, poor real, measures efficiency low, once have selected a range, the scope of measured signal is just determined, dynamic range is low; 2, control programmable amplifier by controller and realize dynamic gain adjustment, this scheme needs constantly according to the gain of measurement result conditioning signal, until gain is best, just obtains an efficiently sampling, and the sampled result low precision obtained during gain non-optimal, be invalid sampling.The shortcoming of this technical scheme is when signal magnitude frequently changes, and need frequently to regulate gain, efficiently sampling number is few, causes poor real, and sample rate is slow.
Utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of multrirange signal pickup assembly.The technical problem that the utility model mainly solves is: by multistage amplification, cooperatively interacting of Multi-path synchronous A/D converter and automatic range functional module, improves dynamic range and the real-time of signal pickup assembly.
The technical scheme that the utility model adopts is: comprise follower, multistage amplifier circuit, frequency overlapped-resistable filter, multi-channel synchronous A/D converter, automatic range functional module, digital output interface.
By carrying out the amplification of different multiples to input signal, and synchronized sampling is carried out to each passage, after each sampling, by automatic range functional module, each sampled value is analyzed, select the signal of best range.
Compared with prior art, the beneficial effects of the utility model are: overcome in background technology
Measurement dynamic range is low, and sample rate is slow, the shortcoming of poor real.
Accompanying drawing explanation
Fig. 1 is the utility model electricity theory diagram;
Fig. 2 is the theory diagram of automatic range functional module.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is the structure chart of the utility model preferred implementation.As shown in Figure 1, a kind of multrirange signal pickup assembly, primarily of follower, multistage amplifier circuit, frequency overlapped-resistable filter, multi-channel synchronous A/D converter, automatic range functional module and digital output interface composition.
When the utility model is implemented, analog signal to be measured enters follower, input impedance can be improved, follower output signal sends multistage amplifier circuit to, in the present embodiment, adopt three grades of amplifications, every one-level multiplication factor is set to 10, and the every one-level multiplication factor of amplifying circuit sum of series can set according to actual needs separately.
Every one-level amplifying signal is connected to the input interface of multi-channel synchronous A/D converter by frequency overlapped-resistable filter, frequency overlapped-resistable filter can be active low-pass filter or passive low ventilating filter, in the present embodiment, synchronous A/D converter is four-way, can adopt the synchronous A/D converter of other port numbers according to the progression of amplifying circuit.
Fig. 2 is the theory diagram of automatic range functional module 5, comprises ADC time-sequence control module, gain selection module and gain recovery module three parts, and its operation principle is divided into following step:
(1) ADC time-sequence control module control ADC is periodically to each channel signal synchronized sampling, obtains the sampled data of each passage and is transferred to gain selection module.
(2) gain selection module judges by the order from high-gain to low gain successively to the data of each passage, concrete basis for estimation is: the data first judging 1000 times of amplification channels, if this channel data is greater than setting threshold, show that this channel signal gain is excessive, and then judge the data of 100 times of amplification channels, the rest may be inferred, until the data judged are not more than setting threshold, this passage is best range, and this channel data and channel information are transferred to gain recovery module.
(3) gain recovery module, by the gain of channel data divided by this passage, is namely obtained the A/D transformation result of original input signal, and this result is exported by digital output interface.
Automatic range functional module is realized by FPGA or CPLD, and therefore they are parallel runnings, and end of at every turn sampling, can export sampled result in real time.
Claims (5)
1. a multrirange signal pickup assembly, it is characterized in that, comprise follower, multistage amplifier circuit, frequency overlapped-resistable filter, multi-channel synchronous A/D converter, automatic range functional module and digital output interface, described follower is connected between signal input and multistage amplifier circuit, and described automatic range functional module is realized by FPGA or CPLD.
2. multrirange signal pickup assembly according to claim 1, is characterized in that, described multistage amplifier circuit is cascaded structure, and every one-level amplifying unit output signal is connected with ADC input interface respectively by frequency overlapped-resistable filter.
3. multrirange signal pickup assembly according to claim 1, is characterized in that, the amplifier that described follower and multistage amplifier circuit adopt is rail-to-rail amplifier.
4. multrirange signal pickup assembly according to claim 1, is characterized in that, the input voltage range of described follower is lower than the supply power voltage of amplifying circuit, and the supply power voltage of described multistage amplifier circuit is lower than the maximum input voltage of ADC.
5. multrirange signal pickup assembly according to claim 1, it is characterized in that, described automatic range functional module is realized by FPGA or CPLD, and after each sampling, automatic range functional module selects the data that the passage of best magnification is corresponding from multiple channel data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521132698.9U CN205232200U (en) | 2015-12-31 | 2015-12-31 | Multrirange signal pickup assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521132698.9U CN205232200U (en) | 2015-12-31 | 2015-12-31 | Multrirange signal pickup assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205232200U true CN205232200U (en) | 2016-05-11 |
Family
ID=55907242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521132698.9U Expired - Fee Related CN205232200U (en) | 2015-12-31 | 2015-12-31 | Multrirange signal pickup assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205232200U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109596928A (en) * | 2019-01-29 | 2019-04-09 | 无锡市朗迪测控技术有限公司 | A kind of static parameter test device for automobile dynamo governor |
| CN110646662A (en) * | 2019-09-20 | 2020-01-03 | 东风商用车有限公司 | Multi-channel trigger current test system and debugging and testing method thereof |
| CN110940416A (en) * | 2019-11-18 | 2020-03-31 | 武汉光谷信息光电子创新中心有限公司 | Multichannel parallel photoelectric detection circuit structure |
| CN110988089A (en) * | 2019-12-16 | 2020-04-10 | 江西农业大学 | Wide-range digital electrochemical analysis device and detection method |
| CN111638669A (en) * | 2020-05-25 | 2020-09-08 | 上海海事大学 | Signal acquisition system and acquisition method for abnormal monitoring signals |
| CN111856278A (en) * | 2020-08-05 | 2020-10-30 | 贵州电网有限责任公司 | Multichannel multi-range frequency response test signal acquisition device and acquisition method |
| CN114167229A (en) * | 2021-11-12 | 2022-03-11 | 广西电网有限责任公司柳州供电局 | Test power supply insulation fault monitoring and searching system and method |
| CN114942067A (en) * | 2022-07-26 | 2022-08-26 | 惟太科技(苏州)有限公司 | Photoelectric amplifier and working method thereof |
| CN115328257A (en) * | 2022-09-14 | 2022-11-11 | 国仪量子(合肥)技术有限公司 | Multi-channel direct current system |
-
2015
- 2015-12-31 CN CN201521132698.9U patent/CN205232200U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109596928A (en) * | 2019-01-29 | 2019-04-09 | 无锡市朗迪测控技术有限公司 | A kind of static parameter test device for automobile dynamo governor |
| CN109596928B (en) * | 2019-01-29 | 2024-03-22 | 无锡市朗迪测控技术有限公司 | Static parameter testing device for automobile generator regulator |
| CN110646662B (en) * | 2019-09-20 | 2022-05-03 | 东风商用车有限公司 | Multi-channel trigger current test system and debugging and testing method thereof |
| CN110646662A (en) * | 2019-09-20 | 2020-01-03 | 东风商用车有限公司 | Multi-channel trigger current test system and debugging and testing method thereof |
| CN110940416A (en) * | 2019-11-18 | 2020-03-31 | 武汉光谷信息光电子创新中心有限公司 | Multichannel parallel photoelectric detection circuit structure |
| CN110988089A (en) * | 2019-12-16 | 2020-04-10 | 江西农业大学 | Wide-range digital electrochemical analysis device and detection method |
| CN111638669A (en) * | 2020-05-25 | 2020-09-08 | 上海海事大学 | Signal acquisition system and acquisition method for abnormal monitoring signals |
| CN111856278A (en) * | 2020-08-05 | 2020-10-30 | 贵州电网有限责任公司 | Multichannel multi-range frequency response test signal acquisition device and acquisition method |
| CN114167229A (en) * | 2021-11-12 | 2022-03-11 | 广西电网有限责任公司柳州供电局 | Test power supply insulation fault monitoring and searching system and method |
| CN114942067A (en) * | 2022-07-26 | 2022-08-26 | 惟太科技(苏州)有限公司 | Photoelectric amplifier and working method thereof |
| CN114942067B (en) * | 2022-07-26 | 2023-06-23 | 惟太科技(苏州)有限公司 | Photoelectric amplifier and working method thereof |
| CN115328257A (en) * | 2022-09-14 | 2022-11-11 | 国仪量子(合肥)技术有限公司 | Multi-channel direct current system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205232200U (en) | Multrirange signal pickup assembly | |
| CN103163380B (en) | Micro-ohm resistance measurement system based on LabVIEW developing platform | |
| CN204155439U (en) | A kind of multi-channel high-accuracy data acquisition unit | |
| CN101917196B (en) | Analog-to-digital joint type data acquisition device | |
| CN1808285B (en) | High-precision analog-to-digital converter based on PGA and control method thereof | |
| CN101902223A (en) | Channel presetting method for analog-digital joint data acquisition device | |
| CN105490654A (en) | Automatic gain controller control method of voice acquisition system and circuit thereof | |
| CN201682485U (en) | Analog-to-digital combined data acquisition device | |
| CN101895267B (en) | Gain preset method of collecting double-channel analog-digital joint mode variable gain data | |
| CN104300941A (en) | Nuclear impulse processing circuit | |
| CN203368444U (en) | Multi-range self-protection AD signal acquisition device | |
| CN209460615U (en) | A kind of SCM Based A/D acquisition device | |
| CN204272029U (en) | Two-way Wideband Intermediate Frequency assembly | |
| CN206975227U (en) | A kind of multichannel pulse size analyzer | |
| CN102706932A (en) | Circuit and method for adapting forward/reverse current of electrochemical gas sensor | |
| CN204515523U (en) | A kind of controller switching equipment and multichannel AC synchronized sampling unit thereof | |
| CN204886865U (en) | A intelligent monitoring terminal for photovoltaic power plant | |
| CN202393814U (en) | Sampling circuit with operation amplification function | |
| CN204705640U (en) | A kind of cement consistency data acquisition system (DAS) | |
| CN204536261U (en) | Long-range soil electrolyte detection probe | |
| CN203761339U (en) | Signal sampling circuit structure | |
| CN202583057U (en) | Probe signal processing circuit for infrared gas sensor | |
| CN201935768U (en) | Stretching tension test circuit for steel wire rope | |
| CN205301898U (en) | Novel portable signal acquisition device | |
| CN204988452U (en) | A high accuracy weighing device for metal material fatigue damage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20161231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |