CN113852377A - AI collection system and AI collection system thereof - Google Patents
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- CN113852377A CN113852377A CN202111182102.6A CN202111182102A CN113852377A CN 113852377 A CN113852377 A CN 113852377A CN 202111182102 A CN202111182102 A CN 202111182102A CN 113852377 A CN113852377 A CN 113852377A
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- H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
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Abstract
The invention discloses an AI acquisition device, which carries out common-mode voltage adjustment and differential-mode gain adjustment on a differential voltage signal obtained by converting a differential voltage acquisition circuit through a differential amplifier so as to meet the input requirement of an analog-to-digital converter, so that the analog-to-digital converter carries out analog-to-digital conversion on the differential voltage signal to obtain a digital signal, thereby completing the acquisition of AI. In addition, the anti-aliasing matching circuit in the application can filter high-frequency interference and improve acquisition precision as a low-pass filter on one hand, and on the other hand can raise the potential of the input end of the differential amplifier through self electric energy storage and improve the sampling frequency of the analog-to-digital converter, namely, the acquisition speed of the AI is improved. The invention also discloses an AI acquisition system which has the same beneficial effects as the AI acquisition device.
Description
Technical Field
The invention relates to the field of signal acquisition, in particular to an AI acquisition device and an AI acquisition system.
Background
Analog signals are a common signal form which can be used for data transmission, many devices (for example, most sensors) generally use the analog signals when transmitting data, the analog signals are generally collected into a controller for use, the real-time performance and the precision of the analog signals are two important indexes, a mature AI (analog Input) collecting device is lacked in the prior art, and it is difficult to guarantee a high collecting speed and a high collecting precision at the same time.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an AI acquisition device, an anti-aliasing circuit can perform low-pass filtering and high-frequency interference filtering on one hand, and improve the acquisition precision of AI, and on the other hand, can also raise the potential of the input end of a differential amplifier through the self electric energy storage, thereby improving the sampling speed of an analog-to-digital converter; the anti-aliasing circuit can perform low-pass filtering to remove high-frequency interference and improve the acquisition precision of the AI, and can also raise the potential at the input end of the differential amplifier through self electric energy storage so as to improve the sampling speed of the analog-to-digital converter.
In order to solve the above technical problem, the present invention provides an AI acquisition device, including:
the differential voltage acquisition circuit is connected with the input end of the target equipment and is used for converting the analog input AI signal output by the target equipment into a differential voltage signal;
the differential amplifier is connected with the input end of the differential voltage acquisition circuit and used for carrying out common-mode voltage adjustment and differential-mode gain adjustment on the differential voltage signal so as to meet the input requirement of the analog-to-digital converter;
the anti-aliasing circuit is used for performing low-pass filtering on the differential voltage signal output by the differential amplifier and lifting the potential of the input end of the differential amplifier through self electric energy storage;
the analog-to-digital converter is connected with the input end of the anti-aliasing circuit and the output end of the analog-to-digital converter is connected with the controller and is used for performing analog-to-digital conversion on the differential voltage signal subjected to low-pass filtering.
Preferably, the target device is a two-wire sensor or a four-wire sensor;
the differential voltage acquisition circuit includes:
a power supply for providing a supply voltage for the two-wire sensor;
a voltage output terminal having a first end connected to the power supply and a second end for connection to a power supply end of the two-wire sensor;
the first end of the differential voltage conversion circuit is used for receiving a positive end current signal of the target equipment;
the first end of the differential voltage conversion circuit is used for being connected with the negative end current signal output end of the four-wire system sensor, and the second end of the differential voltage conversion circuit is connected with a negative end signal connection terminal which is used for receiving a negative end current signal of the four-wire system sensor;
the second end is used as the output end of the differential voltage acquisition circuit, and the grounding end of the differential voltage conversion circuit is grounded and used for converting the current signals output by the positive end signal connecting terminal and the negative end signal connecting terminal into differential voltage signals.
Preferably, the differential voltage conversion circuit includes a first resistor and a second resistor;
the first end of first resistance respectively with positive terminal signal connection terminal second end and differential amplifier's input is connected, the second end of first resistance respectively with the first end of second resistance and differential amplifier's input is connected, the second end ground connection of second resistance.
Preferably, the AI acquisition device further comprises:
and the low-pass filter circuit is arranged between the differential voltage acquisition circuit and the differential amplifier and is used for performing low-pass filtering on the differential voltage signal output by the differential voltage acquisition circuit.
Preferably, the AI acquisition device further comprises:
and the current-limiting resistor is connected between the differential voltage acquisition circuit and the differential amplifier in series and used for improving the resistance in a loop where the current-limiting resistor is arranged.
Preferably, the anti-aliasing circuit and the low-pass filter circuit are both resistance-capacitance RC filter circuits.
Preferably, the analog-to-digital converter is further configured to provide a reference voltage for the differential amplifier, so that the analog-to-digital converter adjusts the common mode voltage based on the reference voltage.
Preferably, the AI acquisition device further comprises:
and the open communication protocol HART signal filtering circuit is arranged on the addressable remote sensor high-speed channel between the analog-to-digital converter and the controller and is used for filtering HART signals coupled in the digital signals output by the analog-to-digital converter.
Preferably, the whole of the analog-to-digital converter and the HART signal filtering circuit is a sigma-delta ADC.
In order to solve the above technical problems, the present invention further provides an AI acquisition system, which includes a plurality of AI acquisition devices as described above, and further includes the controller.
The invention provides an AI acquisition device, which performs common-mode voltage adjustment and differential-mode gain adjustment on a differential voltage signal obtained by converting a differential voltage acquisition circuit through a differential amplifier so as to meet the input requirement of an analog-to-digital converter, so that the analog-to-digital converter performs analog-to-digital conversion on the differential voltage signal to obtain a digital signal, and the AI acquisition is completed. In addition, the anti-aliasing matching circuit in the application can filter high-frequency interference and improve acquisition precision as a low-pass filter on one hand, and on the other hand can raise the potential of the input end of the differential amplifier through self electric energy storage and improve the sampling frequency of the analog-to-digital converter, namely, the acquisition speed of the AI is improved.
The invention also provides an AI acquisition system, which has the same beneficial effects as the AI acquisition device.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an AI acquisition device according to the present invention;
fig. 2 is a schematic structural diagram of another AI acquisition device provided by the present invention.
Detailed Description
The core of the invention is to provide an AI acquisition device, on one hand, an anti-aliasing circuit can perform low-pass filtering and filtering high-frequency interference, so that the acquisition precision of the AI is improved, and on the other hand, the electric potential at the input end of a differential amplifier can be raised through the self electric energy storage, so that the sampling speed of an analog-to-digital converter is improved; the other core of the invention is to provide an AI acquisition system comprising the AI acquisition device, the anti-aliasing circuit can perform low-pass filtering to remove high-frequency interference and improve the acquisition precision of the AI on one hand, and can also raise the potential at the input end of the differential amplifier through the self electric energy storage on the other hand, thereby improving the sampling speed of the analog-to-digital converter.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an AI acquisition device provided in the present invention, the AI acquisition device includes:
the differential voltage acquisition circuit 11 is connected with the input end of the target device and is used for converting the analog input AI signal output by the target device into a differential voltage signal;
the differential amplifier 12 is connected with the input end of the differential voltage acquisition circuit 11, and is used for performing common-mode voltage adjustment and differential-mode gain adjustment on differential voltage signals so as to meet the input requirement of the analog-to-digital converter 14;
the anti-aliasing circuit 13 is connected with the input end of the differential amplifier 12 and is used for low-pass filtering the differential voltage signal output by the differential amplifier 12 and boosting the potential of the input end of the differential amplifier 12 through self electric energy storage;
and the analog-to-digital converter 14 is connected with the input end of the anti-aliasing circuit 13 and the output end of the analog-to-digital converter is connected with the controller and is used for performing analog-to-digital conversion on the differential voltage signal subjected to the low-pass filtering.
Specifically, in view of the technical problems in the background art, in the present application, it is desired to simultaneously improve the acquisition speed and the acquisition precision of the AI, wherein it is considered that the sampling frequency of the analog-to-digital converter 14 is related to the potential of the input end thereof, if the potential of the input end of the analog-to-digital converter 14 can be raised, the sampling frequency of the analog-to-digital converter 14 can be significantly raised, so as to improve the sampling speed of the AI, and it is considered that the anti-aliasing circuit 13 itself can raise the potential of the output end thereof through the electric energy storage thereof, and can also perform low-pass filtering to remove the high-frequency interference in the signal, so the anti-aliasing circuit 13 is provided at the input end of the analog-to-digital converter 14, and the sampling frequency and the sampling precision are improved at the same time.
Specifically, this application can convert the analog input AI signal of target device output into differential voltage signal through differential voltage acquisition circuit 11, because differential signal itself has stronger interference killing feature, consequently can further promote the collection precision of AI.
In order to reduce high-frequency disturbance signals generated by noise, the anti-aliasing circuit 13 in the embodiment of the present invention prevents these disturbances from being coupled to the acquisition circuit of the subsequent analog-to-digital converter 14, and the anti-aliasing circuit 13 may also be used to isolate or decouple the input charge switching pulse of the subsequent analog-to-digital converter 14. In addition, considering that the analog-to-digital converter 14 has requirements for differential mode voltage and common mode voltage of the input differential voltage, and the differential voltage signal output by the differential voltage acquisition circuit 11 may not meet the requirements, the differential amplifier 12 may perform common mode voltage adjustment and differential mode gain adjustment on the differential voltage signal in order to meet the input requirements of the analog-to-digital converter 14 in the present application.
The controller may be of various types, for example, may be an FPGA (Field Programmable Gate Array), and the like, and the embodiment of the present invention is not limited herein.
The invention provides an AI acquisition device, which performs common-mode voltage adjustment and differential-mode gain adjustment on a differential voltage signal obtained by converting a differential voltage acquisition circuit through a differential amplifier so as to meet the input requirement of an analog-to-digital converter, so that the analog-to-digital converter performs analog-to-digital conversion on the differential voltage signal to obtain a digital signal, and the AI acquisition is completed. In addition, the anti-aliasing matching circuit in the application can filter high-frequency interference and improve acquisition precision as a low-pass filter on one hand, and on the other hand can raise the potential of the input end of the differential amplifier through self electric energy storage and improve the sampling frequency of the analog-to-digital converter, namely, the acquisition speed of the AI is improved.
For better explaining the embodiment of the present invention, please refer to fig. 2, fig. 2 is a schematic structural diagram of another AI acquisition device provided by the present invention, and on the basis of the above embodiment:
as a preferred embodiment, the target device is a two-wire sensor or a four-wire sensor;
the differential voltage acquisition circuit 11 includes:
a power supply for providing a supply voltage for the two-wire sensor;
the first end of the voltage output terminal is connected with a power supply, and the second end of the voltage output terminal is used for being connected with the power supply end of the two-wire sensor;
the first end of the differential voltage conversion circuit is used for being connected with the positive end signal connection terminal of the target equipment, and the second end of the differential voltage conversion circuit is used for receiving a positive end current signal of the target equipment;
the first end of the differential voltage conversion circuit is used for being connected with the negative end current signal output end of the four-wire system sensor, and the second end of the differential voltage conversion circuit is connected with a negative end signal connection terminal which is used for receiving a negative end current signal of the four-wire system sensor;
the second terminal is used as the output terminal of the differential voltage acquisition circuit 11, and the differential voltage conversion circuit with the grounded ground terminal is used for converting the current signals output by the positive terminal signal connection terminal and the negative terminal signal connection terminal into differential voltage signals.
Specifically, in fig. 2, F _24V is a power supply, 24Vn + is a voltage output terminal, AIn + is a positive terminal signal connection terminal, AIn-is a negative terminal signal connection terminal, the first resistor R1 and the second resistor R2 constitute a differential voltage conversion circuit, R6, R7 and C1 constitute a low pass filter circuit, R4 and R5 are both current limiting resistors, N1 is the differential amplifier 12, R8, R9 and C2 constitute an anti-aliasing circuit, U1 is the analog-to-digital converter 14, C4, R12, MUX and (Highway Addressable Remote sensor express) chips collectively constitute a HART signal processing circuit which can turn on an AI signal in any one of the 32 channels, first can filter the AI signal in the channel and decode the AI signal, and accordingly, the HART signal processing circuit can also transmit the designated channel to the designated HART device, thereby completing HART communication.
Specifically, the differential voltage acquisition circuit 11 in the embodiment of the present invention may perform AI reception for a two-wire or four-wire sensor that outputs a current signal, but may also receive AI of a sensor output that directly outputs a differential voltage by removing the differential voltage conversion circuit, which is not limited herein in the embodiment of the present invention.
Specifically, for a two-wire sensor, the positive terminal current signal output terminal of the two-wire sensor can be connected to the first terminal of the positive terminal signal connection terminal, and the power supply terminal of the two-wire sensor can be connected to the second terminal of the voltage output terminal, and for a four-wire sensor, the positive terminal current signal output terminal of the four-wire sensor can be connected to the first terminal of the positive terminal signal connection terminal, and the negative terminal current signal output terminal of the four-wire sensor can be connected to the first terminal of the negative terminal signal connection terminal, so that the AI acquisition can be realized.
The terminals can be arranged on a terminal board together, so that the terminals can be fixed conveniently.
Specifically, the differential voltage acquisition circuit 11 in the embodiment of the present invention has the advantages of simple structure and low cost.
Of course, besides this configuration, the specific configuration of the differential voltage acquisition circuit 11 may also be in other forms, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the differential voltage conversion circuit includes a first resistor and a second resistor;
the first end of the first resistor is connected to the second end of the positive terminal signal connection terminal and the input terminal of the differential amplifier 12, the second end of the first resistor is connected to the first end of the second resistor and the input terminal of the differential amplifier 12, and the second end of the second resistor is grounded.
Specifically, the differential voltage conversion circuit in the embodiment of the invention has the advantages of simple structure, low cost, long service life and the like.
Of course, the differential voltage converting circuit may be in other forms besides the specific configuration, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the AI acquisition device further includes:
and the low-pass filter circuit is arranged between the differential voltage acquisition circuit 11 and the differential amplifier 12 and is used for performing low-pass filtering on the differential voltage signal output by the differential voltage acquisition circuit 11.
Specifically, a low-pass filter circuit is additionally added to perform low-pass filtering in the embodiment of the invention, so that high-frequency interference in the AI can be further filtered, and the precision of AI acquisition is further improved.
As a preferred embodiment, the AI acquisition device further includes:
and the current-limiting resistor is connected in series between the differential voltage acquisition circuit 11 and the differential amplifier 12 and is used for improving the resistance in a loop where the current-limiting resistor is located.
Specifically, considering that the devices in the loop are damaged if a large current is generated in the loop, in the embodiment of the present invention, a current limiting resistor is connected in series between the differential voltage acquisition circuit 11 and the differential amplifier 12, so as to limit the large current generated in the loop, protect the related devices from being damaged, and reduce the maintenance cost.
In a preferred embodiment, the anti-aliasing circuit 13 and the low-pass filter circuit are both resistance-capacitance RC filter circuits.
Specifically, the RC filter circuit has the advantages of simple structure and low cost.
Of course, the anti-aliasing circuit 13 and the low-pass filter circuit may be in other forms besides the RC filter circuit, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the analog-to-digital converter 14 is also used to provide a reference voltage for the differential amplifier 12 so that it performs common-mode voltage adjustment based on the reference voltage.
Specifically, considering that the cost is increased if a voltage source is additionally provided for the differential amplifier 12 to provide the reference voltage, the analog-to-digital converter 14 may be used to directly provide the reference voltage for the differential amplifier 12, so that the common-mode voltage is adjusted based on the reference voltage, thereby reducing the cost.
As a preferred embodiment, the AI acquisition device further includes:
and the HART signal filter circuit of the open communication protocol of the highway of the addressable remote sensor, which is arranged between the analog-to-digital converter 14 and the controller, is used for filtering HART signals coupled in the digital signals output by the analog-to-digital converter 14.
Specifically, in some scenarios, for example, in a DCS (Distributed Control System) or a SIS (Safety instrumentation System), the AI of the sensor is often coupled with a HART signal, so in order to extract the AI in such coupled signal, a HART signal filtering circuit is further disposed between the analog-to-digital converter 14 and the controller, through which the HART signal coupled in the digital signal output by the analog-to-digital converter 14 can be filtered.
In a preferred embodiment, the integrated ADC and the analog-to-digital converter 14 and the HART signal filtering circuit are sigma-delta ADCs.
Specifically, considering that the sigma-delta ADC (Analog to Digital Converter, ADC 14) itself includes a HART signal filtering circuit capable of filtering HART signals, the structure of the AI acquisition device can be simplified by the sigma-delta ADC, and the sigma-delta ADC can also internally perform low-pass filtering, which is beneficial to further improving the AI acquisition accuracy.
Specifically, in the embodiment of the present invention, 8 channel synchronous sampling ADCs may be innovatively used, 8 complete sigma-delta ADCs may be integrated on a chip, each input channel has a programmable gain stage with a gain of 1, 2, 4, and 8, and the low-amplitude sensor output may be mapped to the full-scale ADC input range, so as to maximize the dynamic range of the signal chain, the reference source voltage range is 1V to 3.6V, the analog input receives a unipolar (0V to VREF) or true bipolar (± VREF/2V) analog input signal, the analog power supply voltage is 3.3V or ± 1.65V, respectively, and the analog input may be configured to receive a true differential or single-ended signal to match different sensor output configurations. Each channel comprises an ADC modulator and a sinc3 low-delay digital filter, and the fine resolution control of the ODR (Output Data Register) can be performed by using the SRC Register bit, and this control can be used for the application that when the line frequency changes to 0.01Hz, the ODR resolution needs to maintain coherence, the SRC can be programmed by using a Serial Peripheral Interface (SPI), the ADC chip can be configured by using the SPI, and the SAR ADC (successive approximation analog-digital converter) can be controlled and read, and the SPI can be configured to Output the conversion Data of the sigma-delta ADC.
Of course, the analog-to-digital converter 14 may be of other types besides the sigma-delta ADC, and the embodiment of the invention is not limited herein.
Specifically, considering that if a HART signal is coupled to an AI output by a target device, the sampling frequency of the ADC needs to be adaptively reduced so as to perform analog-to-digital conversion stably and filter the HART signal, and if the HART signal is not coupled, the ADC can be operated at a higher sampling frequency, and specifically, whether the HART signal is coupled to an input signal of the AI sampling device of the controller can be notified through the human-computer interaction device, if the HART signal is coupled, the controller can adjust the sampling frequency of the ADC to a first preset sampling frequency, and if the HART signal is not coupled, the controller can adjust the sampling frequency of the ADC to a second preset sampling frequency higher than the first preset sampling frequency.
The first preset sampling frequency may be 1.2kHz, and both the AI sampling precision and the sampling speed may be considered, which is not limited herein in the embodiments of the present invention.
In order to solve the above technical problem, the present invention further provides an AI collecting system, which includes a plurality of AI collecting devices according to the foregoing embodiments, and a controller.
Specifically, in the embodiment of the present invention, in order to ensure real-time performance of on-site signal acquisition, an 8-channel parallel sigma-delta ADC may be innovatively selected at U1 in fig. 2, so that the acquisition precision is ensured and the signal acquisition conversion time can be greatly increased.
For the introduction of the AI acquisition system provided in the embodiments of the present invention, reference is made to the foregoing embodiments of the AI acquisition device, and the embodiments of the present invention are not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An AI collection device, comprising:
the differential voltage acquisition circuit is connected with the input end of the target equipment and is used for converting the analog input AI signal output by the target equipment into a differential voltage signal;
the differential amplifier is connected with the input end of the differential voltage acquisition circuit and used for carrying out common-mode voltage adjustment and differential-mode gain adjustment on the differential voltage signal so as to meet the input requirement of the analog-to-digital converter;
the anti-aliasing circuit is used for performing low-pass filtering on the differential voltage signal output by the differential amplifier and lifting the potential of the input end of the differential amplifier through self electric energy storage;
the analog-to-digital converter is connected with the input end of the anti-aliasing circuit and the output end of the analog-to-digital converter is connected with the controller and is used for performing analog-to-digital conversion on the differential voltage signal subjected to low-pass filtering.
2. The AI acquisition device of claim 1, wherein the target device is a two-wire sensor or a four-wire sensor;
the differential voltage acquisition circuit includes:
a power supply for providing a supply voltage for the two-wire sensor;
a voltage output terminal having a first end connected to the power supply and a second end for connection to a power supply end of the two-wire sensor;
the first end of the differential voltage conversion circuit is used for receiving a positive end current signal of the target equipment;
the first end of the differential voltage conversion circuit is used for being connected with the negative end current signal output end of the four-wire system sensor, and the second end of the differential voltage conversion circuit is connected with a negative end signal connection terminal which is used for receiving a negative end current signal of the four-wire system sensor;
the second end is used as the output end of the differential voltage acquisition circuit, and the grounding end of the differential voltage conversion circuit is grounded and used for converting the current signals output by the positive end signal connecting terminal and the negative end signal connecting terminal into differential voltage signals.
3. The AI acquisition device of claim 2, wherein the differential voltage conversion circuit includes a first resistor and a second resistor;
the first end of first resistance respectively with positive terminal signal connection terminal second end and differential amplifier's input is connected, the second end of first resistance respectively with the first end of second resistance and differential amplifier's input is connected, the second end ground connection of second resistance.
4. The AI acquisition device of claim 3, further comprising:
and the low-pass filter circuit is arranged between the differential voltage acquisition circuit and the differential amplifier and is used for performing low-pass filtering on the differential voltage signal output by the differential voltage acquisition circuit.
5. The AI acquisition device of claim 4, further comprising:
and the current-limiting resistor is connected between the differential voltage acquisition circuit and the differential amplifier in series and used for improving the resistance in a loop where the current-limiting resistor is arranged.
6. The AI acquisition device of claim 4, wherein the anti-aliasing circuit and the low-pass filter circuit are both resistor-capacitor (RC) filter circuits.
7. The AI acquisition device of claim 1, wherein the analog-to-digital converter is further configured to provide a reference voltage to the differential amplifier such that it performs common-mode voltage adjustment based on the reference voltage.
8. The AI acquisition device according to any one of claims 1 to 7, further comprising:
and the open communication protocol HART signal filtering circuit is arranged on the addressable remote sensor high-speed channel between the analog-to-digital converter and the controller and is used for filtering HART signals coupled in the digital signals output by the analog-to-digital converter.
9. The AI acquisition device of claim 8, wherein the analog-to-digital converter and the HART signal filtering circuit together form a sigma-delta ADC.
10. An AI acquisition system, comprising a plurality of AI acquisition devices according to any one of claims 1 to 9, and further comprising the controller.
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| CN202111182102.6A CN113852377A (en) | 2021-10-11 | 2021-10-11 | AI collection system and AI collection system thereof |
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| CN101997515A (en) * | 2009-08-31 | 2011-03-30 | 深圳市理邦精密仪器股份有限公司 | Full-differential same-phase parallel amplifying device for acquiring bioelectric signal |
| CN103176435A (en) * | 2011-12-26 | 2013-06-26 | 北京国电智深控制技术有限公司 | Device and method of interface for achieving connection of distributed control system and measuring device |
| CN110786848A (en) * | 2019-10-22 | 2020-02-14 | 天津大学 | Single-channel acquisition amplifier for multiple physiological parameter signals |
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- 2021-10-11 CN CN202111182102.6A patent/CN113852377A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997515A (en) * | 2009-08-31 | 2011-03-30 | 深圳市理邦精密仪器股份有限公司 | Full-differential same-phase parallel amplifying device for acquiring bioelectric signal |
| CN103176435A (en) * | 2011-12-26 | 2013-06-26 | 北京国电智深控制技术有限公司 | Device and method of interface for achieving connection of distributed control system and measuring device |
| CN110786848A (en) * | 2019-10-22 | 2020-02-14 | 天津大学 | Single-channel acquisition amplifier for multiple physiological parameter signals |
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