CN116481599A - Multichannel signal acquisition device and sensor system - Google Patents
Multichannel signal acquisition device and sensor system Download PDFInfo
- Publication number
- CN116481599A CN116481599A CN202310747098.6A CN202310747098A CN116481599A CN 116481599 A CN116481599 A CN 116481599A CN 202310747098 A CN202310747098 A CN 202310747098A CN 116481599 A CN116481599 A CN 116481599A
- Authority
- CN
- China
- Prior art keywords
- signal
- signals
- analog
- signal acquisition
- acquisition device
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- 238000012545 processing Methods 0.000 claims abstract description 26
- 230000014509 gene expression Effects 0.000 claims abstract description 17
- 230000000630 rising effect Effects 0.000 claims description 22
- 230000003750 conditioning effect Effects 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 11
- 230000010354 integration Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/1205—Multiplexed conversion systems
Abstract
The present disclosure relates to a multichannel signal acquisition device and a sensor system. The multichannel signal acquisition device obtains multichannel sensor signals, wherein the multichannel sensor signals are analog signals adopting a time domain signal expression mode and respectively represent sensing results corresponding to a plurality of sensors, and the multichannel signal acquisition device comprises: and the analog-to-digital conversion module is configured to convert part or all of the multiple sensor signals into corresponding digital signals in parallel. Therefore, by utilizing the multichannel signal acquisition equipment disclosed by the invention, the system integration level can be improved, the acquisition processing time of multichannel sensor signals is shortened, and the multichannel signal acquisition equipment is simple in circuit and small in chip occupation area.
Description
Technical Field
The present disclosure relates to the field of sensors, and in particular to the acquisition of sensor signals and related processing.
Background
Existing multi-channel signal acquisition devices typically employ a conventional bus transmission-based multi-channel signal acquisition architecture, such as that shown in fig. 1. However, in the multi-channel signal acquisition architecture based on bus transmission, each channel is a complete signal processing acquisition system, for example, as shown in fig. 1, each channel includes a signal conditioning module, an analog-to-digital conversion module and a calculation communication module, which leads to a significant increase in the overall cost.
In view of the above problems of the multi-channel signal acquisition architecture based on bus transmission, the prior artThe technology also proposes a common multi-channel signal acquisition architecture, i.e. a multi-channel signal acquisition architecture based on a standard voltage-type analog-to-digital converter (Analog to Digital Converter, hereinafter referred to as "ADC"), such as that shown in fig. 2. In the architecture, each signal channel shares an analog-to-digital conversion module and a calculation communication module. However, the architecture based on the standard voltage analog-to-digital converter can only process the analog voltage input of one channel at any time, so that in the case of multiple signal inputs, a multiple selection module is needed to be arranged in front for selecting the transmitted multiple signals, that is, one of the multiple signals is selected to be transmitted to the ADC for analog-to-digital conversion at a time. In the case of N signal inputs as shown in FIG. 2, it is assumed that each signal processing time is t 0 Because the ADC needs time-sharing processing, the processing time of the N paths of signals is n×t 0 Thus greatly increasing the acquisition time of the multichannel signal.
Thus, it is desirable to improve the architecture of a multi-channel signal acquisition device.
Disclosure of Invention
One technical problem to be solved by the present disclosure is to provide an improved multi-channel signal acquisition device.
According to a first aspect of the present disclosure, there is provided a multi-channel signal acquisition apparatus that obtains multi-channel sensor signals, wherein the multi-channel sensor signals are analog signals in a time-domain signal expression and each represent a sensing result corresponding to each of a plurality of sensors, wherein the multi-channel signal acquisition apparatus includes: and the analog-to-digital conversion module is configured to convert part or all of the multiple sensor signals into corresponding digital signals in parallel.
Optionally, the multiple sensor signals are each rectangular wave voltage signals, and the multiple sensor signals each represent a sensing result of a corresponding sensor using information related to a period of the rectangular wave voltage signals.
Optionally, the information related to the period of the rectangular wave voltage signal includes an absolute duration of the period, a duty cycle, a ratio between adjacent period durations, or a ratio between differences of adjacent period durations.
Optionally, the analog-to-digital conversion module includes a clock generator, a counter, and a plurality of detection parts, wherein the clock generator is configured to generate a clock signal; wherein the counter is configured to count the clock signal and output a count value; and wherein the plurality of detection sections are configured to detect rising and falling edges of the respective multichannel sensor signals, respectively, and record count values at the time of detecting the rising and falling edges.
Optionally, one of the plurality of detection sections comprises an edge detector and a register, wherein an output of the edge detector is coupled to a clock pulse input of the register, the count value being input to a data input of the register; wherein the edge detector is configured to output a pulse signal when both a rising edge and a falling edge of the sensor signal are detected; and wherein the register is configured to register a count value received at the data input upon receipt of a pulse signal at the clock pulse input.
Optionally, the multi-channel signal acquisition device further comprises: and the calculation communication module is configured to perform corresponding calculation and communication processing on the digital signal obtained by the analog-to-digital conversion module.
Optionally, the analog-to-digital conversion module and the calculation communication module are integrated on one main chip, and the multiple sensor signals share the analog-to-digital conversion module and the calculation communication module in the main chip.
Optionally, the multi-channel signal acquisition device further comprises: and the time domain signal conditioning modules are configured to respectively receive the output signals of the sensors and respectively condition the output signals into analog voltage signals adopting a time domain signal expression mode to serve as the multi-path sensor signals.
According to a second aspect of the present disclosure, there is provided a sensor system comprising: a plurality of sensors; and a multichannel signal acquisition device according to the first aspect of the present disclosure.
Therefore, by utilizing the multichannel signal acquisition equipment disclosed by the invention, the system integration level can be improved, the acquisition processing time of multichannel sensor signals is shortened, and the multichannel signal acquisition equipment is simple in circuit and small in chip occupation area.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout exemplary embodiments of the disclosure.
Fig. 1 shows a transmission bus based multichannel signal acquisition architecture according to the prior art.
Fig. 2 shows a multi-channel signal acquisition architecture for a common analog-to-digital converter (ADC) according to the prior art.
Fig. 3 shows a schematic composition diagram of a multichannel signal acquisition device according to one embodiment of the present disclosure.
Fig. 4A-4C illustrate some waveform examples of time domain signal representations of sensor signals, respectively, according to some embodiments of the present disclosure.
Fig. 5A-5B illustrate an ideal waveform example and an interfered waveform example, respectively, of a sensor signal employing a time-domain signal representation according to one embodiment of the present disclosure.
Fig. 6 shows a schematic diagram of the composition of an analog-to-digital conversion module according to one embodiment of the present disclosure.
Fig. 7 is a schematic diagram of simultaneous analog-to-digital conversion processing of multiple sensor signals using time domain signal representations according to one embodiment of the present disclosure.
Fig. 8 shows a schematic diagram of the composition of an analog-to-digital conversion module according to another embodiment of the present disclosure.
Fig. 9 shows a schematic diagram of the composition of a sensor system including a multi-channel sensor and a corresponding multi-channel signal acquisition device according to one embodiment of the present disclosure.
Detailed Description
Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As described above, in order to solve the problems of the prior art multi-channel signal acquisition apparatuses such as those shown in fig. 1 and 2, the present disclosure proposes an improved multi-channel signal acquisition apparatus, which can perform analog-to-digital conversion processing on multiple sensor signals in parallel by using only one analog-to-digital conversion module, thereby improving the system integration level and shortening the acquisition processing time of the multiple sensor signals. The inventive concept will be explained in more detail below in connection with embodiments of the present disclosure illustrated in the accompanying drawings.
Fig. 3 shows a schematic composition diagram of a multichannel signal acquisition device according to one embodiment of the present disclosure.
As shown in fig. 3, in some embodiments, the multi-channel signal acquisition device may include a plurality of signal conditioning modules 311-31N for the multi-channel signal channels 1-N, respectively, which may be configured to receive output signals of the plurality of sensors, respectively, and condition the plurality of output signals into N-channel sensor signals S1-SN (which may each be an analog signal in a time-domain signal representation and each represent a sensing result corresponding to each of the plurality of sensors), respectively, and transmit the N-channel sensor signals to an analog-to-digital conversion module 320 shared by multiple channels in the multi-channel signal acquisition device. The analog-to-digital conversion module 320 is configured to analog-to-digital convert some or all of the multiple sensor signals S1-SN in parallel to obtain digital signals D1-DN corresponding to the multiple sensor signals S1-SN, respectively. In addition, the multi-channel signal acquisition device may further include a calculation communication module 330 subsequent to the analog-to-digital conversion module 320, configured to perform corresponding calculation and communication processing on the digital signals S1-SN obtained by the analog-to-digital conversion module 320, respectively, and output signals thereof may be output to the outside through the standard interface 360. For example, as will be described later, since the sensor signals of the present disclosure employ a time domain signal expression manner that expresses the measured of the sensor using time information, multiple sensor signals in the entire system may be clocked simultaneously (e.g., by setting a unified clock) in some cases, so that the time information of the multiple sensor signals is easily obtained simultaneously, i.e., simultaneous processing of the multiple sensor signals is easily achieved, etc.
Therefore, compared with the prior art (such as shown in fig. 1 or fig. 2), the multichannel signal acquisition device according to the disclosure can enable the multichannel sensor signals to share one analog-to-digital conversion module and one calculation communication module, thereby improving the integration level of the system and reducing the total power consumption of the system. In addition, each channel of signal is only responsible for the signal conditioning module, so that the low-power consumption acquisition of each channel is realized. In addition, the multichannel signal acquisition equipment disclosed by the invention can simultaneously perform analog-to-digital conversion processing on the multichannel sensor signals which are analog signals adopting a time domain signal expression mode, so that the acquisition processing time of the multichannel sensor signals is greatly shortened, and the high-speed acquisition processing of the multichannel signals is realized. With the rapid increase of the channel number N, the invention greatly reduces the benefit brought by the multi-channel acquisition processing time.
In addition, as shown in fig. 3, the analog-to-digital conversion module 320 and the calculation communication module 330 are integrated on one main chip 350, thereby achieving high integration. The plurality of signal conditioning modules 311-31N of the multipath signal path are integrated on the N slave chips 341-34N, respectively. In one possible implementation, the N slave chips 341-34N may also be integrated with respective corresponding sensors or other processing circuits of the sensors. In another possible implementation, the signal conditioning module of each signal channel may be fabricated on a different chip than the sensor. In other embodiments, the signal conditioning module may be omitted in the case where the output signal of the sensor may be directly processed by a subsequent module, such as an analog to digital conversion module. Alternatively, the signal conditioning module may be considered part of the circuitry of the sensor. In addition, in the case of using analog signals in the form of time-domain signal expressions as sensor signals as will be discussed later, in some embodiments, the signal conditioning modules 311-31N may be time-domain signal conditioning modules configured to receive output signals of a plurality of sensors, respectively, and condition the output signals as analog voltage signals in the form of time-domain signal expressions as sensor signals S1-SN, respectively. For example, the output signal of the sensor may be a conventional analog signal, where the amplitude of the voltage is used to represent the sensing result of the sensor, and the time-domain signal conditioning module may convert the conventional analog signal into an analog voltage signal in a time-domain signal expression, where the time-related information is used to represent the sensing result, and as will be described later, the analog voltage signal in the time-domain signal expression is used as the sensor signal, which is not susceptible to interference, so that high-precision acquisition is achieved. In addition, in other embodiments, the N signal conditioning modules may also be integrated onto the main chip along with the analog-to-digital conversion module and the computing communication module. Those skilled in the art will understand that the signal conditioning module may be optionally disposed or not disposed in practice according to the need, and the present invention is not limited in any way.
Those skilled in the art will appreciate that the present invention is not limited to a certain type of sensor, but may be applied to all sensors that output an electrical signal as a sensing result. Herein, the "sensing result" refers to a non-electric quantity (such as various physical quantities, chemical quantities, or biological quantities) sensed by the sensor, and the aforementioned "output signal" or "sensor signal" of the sensor may be various electric signals such as a voltage signal or a current signal representing the sensing result of the sensor.
Those skilled in the art will appreciate that the present invention is not limited to the exemplary configuration of the multi-channel signal acquisition device shown in the various figures of the present disclosure. For example, the multi-channel signal acquisition device may also include other circuit modules not shown in the figures, as required by the actual application. In addition, for example, according to the needs of practical application, the multi-channel signal acquisition device may also remove the computing communication module, the standard interface and the like shown in the figure.
The embodiment of the invention shown in fig. 3 described above will be more clearly illustrated below with an example of an analog signal in the form of a time-domain signal representation as a sensor signal.
In some embodiments, the sensor may include a circuit module to convert a conventional analog signal to an analog signal in a time domain signal representation, such that information originally represented by the amplitude of the analog signal (e.g., the sensing result) is converted to be represented by time. Such time domain signals are concerned with time information and not with signal amplitude variations, compared to conventional analog sensing signals in which the sensing result is represented by signal amplitude, thus further enhancing the anti-interference capability of the sensor signal, as shown in the subsequent fig. 5A-5B. Of course, the disclosure is not limited thereto, but the sensing result may be expressed by directly obtaining an analog signal in a time domain signal expression mode according to the measured non-electric quantity of the sensor. Alternatively, as previously described, a signal conditioning module in a multi-channel signal acquisition device may be utilized to convert a conventional analog signal to an analog voltage signal in a time-domain signal representation.
Fig. 4A-4C illustrate some waveform examples of sensor signals according to some embodiments of the present disclosure, respectively, wherein the sensor signals are analog signals in a time-domain signal representation.
In some possible implementations, the time domain signal representation of the analog signal can be classified into two categories: 1) Expressing information (e.g., the foregoing sensing results) using the absolute time length of the period; 2) The information is expressed using a proportional relationship of the period. The second proportional relation time domain expression can comprise two expressions of duty ratio of each period and adjacent period proportion.
Specifically, as shown in fig. 4A, when the time domain signal is expressed in terms of the absolute period length of the period, the magnitude of the period T thereof may express information of the signal, for example, the magnitude of the conventional analog signal may be converted into the magnitude of the period T in proportion thereto. As shown in FIG. 4B, in use each cycleWhen the duty cycle expresses a time domain signal, the duty cycle expresses information of the signal, such as proportional to the amplitude of the conventional analog signal, i.eWhere TH represents a high-level duration and TL represents a low-level duration. As shown in FIG. 4C, when the time domain signal is expressed in proportion to adjacent periods, the proportion between the periods of adjacent periods or the proportion between the differences of the periods of adjacent periods may express information of the signal, for example, in proportion to the magnitude of the amplitude of a conventional analog signal, i.e.)>Or->Wherein T1, T2, T3 each represent an adjacent 3 period duration. Of course, those skilled in the art will understand that the present invention is not limited to the above-mentioned case of proportionally converting the amplitude of the analog signal into the corresponding period-related information, and other manners may be adopted to convert the measured or the analog signal representing the measured into the corresponding period-related information, as long as there is a mapping relationship between the two.
In some possible implementations, the sensor signal may be a rectangular wave signal, and the sensor signal represents the sensing result with information related to the period of the rectangular wave signal. For example, the sensing result may be represented by information related to the period, such as an absolute period length of the period, a duty ratio, a ratio between adjacent period lengths, or a ratio between differences between adjacent period lengths.
Conventional analog voltage signals have poor interference resistance because the amplitude of the interfered conventional analog voltage signal changes, and the conventional analog voltage signal expresses information (such as sensing results) by the amplitude thereof, so that the next-stage signal processing is affected by the change of the amplitude. However, as shown in fig. 5A and 5B, the analog voltage signal using the time domain signal expression is different, and has strong anti-interference capability because it does not pay attention to the small range of the signal amplitude. In particular, FIGS. 5A-5B illustrate an ideal waveform example and an interfered waveform example, respectively, of a sensor signal employing a time-domain signal representation in accordance with one embodiment of the present disclosure. As shown in fig. 5A and 5B, the sensor signal using the time domain signal expression is focused on only the rising edge and the falling edge E1-E4, and the time of the rising edge and the falling edge E1-E4 is confirmed to confirm the durations T1 and T2. When the time domain signal shown in fig. 5B is disturbed, since the amplitude of the disturbing signal is usually small compared to the height of the rising edge and the falling edge, the interference does not change the judgment of the rising edge and the falling edge, i.e. the time of the rising edge and the falling edge E1'-E4' of the disturbed signal shown in fig. 5B is the same as the time of the rising edge and the falling edge E1-E4 of the ideal signal shown in fig. 5A, and thus the time period is not changed, i.e. t1=t1 ', t2=t2'.
In embodiments where the sensor signal is implemented using various time domain signal representations of analog signals as described above, in some cases, the analog-to-digital conversion module described above may include a clock generator, a counter, and multiple detectors, such as that shown in fig. 6.
Fig. 6 shows a schematic diagram of the composition of an analog-to-digital conversion module according to one embodiment of the present disclosure. Fig. 7 shows a schematic diagram of simultaneous analog-to-digital conversion processing of multiple sensor signals in a time domain signal representation according to an embodiment of the present disclosure, where only two sensor signals S61 and S62 are shown as an example for simplicity and clarity.
As shown in fig. 6, the analog-to-digital conversion module 600 may include a clock generator 610, a counter 620, and N detection parts 631-63N for N sensor signals, respectively. Wherein the clock generator 610 is configured to generate and output a clock signal 611 to the counter 620, and then the counter 620 counts the clock signal 611 and outputs a count value 621. The count value 621 is supplied to each of the detecting sections 631-63N through one common line, wherein each of the detecting sections 631-63N is configured to detect the rising edge and the falling edge of each of the N sensor signals S61-S6N, respectively, and record the count value at each of the rising edge and the falling edge. The N digital signals D61-D6N obtained by the analog-to-digital conversion may be a sequence in which count values at each rising edge and each falling edge of each sensor signal S61-S6N are recorded, respectively; or may be a value related to the period obtained by calculating the count values at the respective rising and falling edges, in which case each of the detecting sections 631-63N is further configured to calculate the count values at the respective rising and falling edges recorded thereby to obtain the value information related to the period.
The clock generator 610 may generate a very high frequency clock signal 611 with respect to the period of the sensor signal, which has a clock period T clock . Because the high-speed clock frequency is very high, its clock period T clock Is very small and can be used as a count reference for the high-speed counter 620. Thus, as shown in fig. 7, the count value of the counter 620 to the clock signal 611 may be regarded as a system clock shared by N sensor signals, the count value (N1, N2, N3, … …) at each rising edge and falling edge of the two sensor signals S61 and S62 is recorded by the corresponding detecting portion, that is, the time at each rising edge and falling edge is recorded, the count value is multiplied by the clock period to obtain time, and the period information may be obtained by the time difference, for example:
high-level duration of sensor signal S61，
Low level duration of sensor signal S61，
The duty cycle calculation formula of the sensor signal S61 is:
，
high-level duration of sensor signal S62，
Low level duration of sensor signal S62，
The duty cycle calculation formula of the sensor signal S62 is:
。
from the above, the global shared high-speed clock and the high-speed counter can convert the sensor signals of any plurality of time domain signal expression modes into corresponding digital signals at the same time, thereby realizing the analog-to-digital conversion processing of the multipath signals at the same time. In theory, the time for processing the multipath signals by the system is reduced to the longest time for processing the single path signals, thereby realizing the high-speed acquisition and processing of the multipath signals. The time resolution of such analog-to-digital conversion is one clock cycle, i.e. the error is within one clock cycle, as long as the clock cycle is sufficiently small, e.g. more than 2 orders of magnitude different, with respect to the period duration of the sensor signal of the time domain signal representation, the error is negligible or within an acceptable range. The appropriate clock signal frequency may be selected according to the required analog-to-digital conversion accuracy.
Fig. 8 shows a more specific structural composition diagram of an analog-to-digital conversion module according to another embodiment of the present disclosure.
Fig. 8 shows for clarity one possible implementation of the detection section as shown in fig. 6 with two sensor signals as examples.
As shown in fig. 8, each of the detecting sections 831/832 may have the same structure, and each includes an edge detector 841/842 and a register 851/852. Wherein each edge detector outputs a detection pulse when detecting an edge (including a rising edge and a falling edge) of an input sensor signal, as a clock signal of a register, and the register holds a count value at that time when receiving the detection pulse.
Specifically, as shown in fig. 8, taking the detection portion 831 as an example, the output terminal of the edge detector 841 is coupled to the clock input terminal CLK of the register 851, and the globally-shared count value 821 output by the counter 820 is input to the data input terminal D of the register 851. The edge detector 841 outputs a pulse signal upon detecting each rising and falling edge of the sensor signal S81, and registers the count value 821 received at the data input D at this time when the register 851 receives the one pulse signal at the clock input CLK, i.e., the non-inverting output Q of the register 851 outputs the data input (count value 821) received at this time until the next clock pulse is received. Thus, the analog-to-digital converted digital signal D81 may be a sequence of count values at each rising and falling edge of the recorded sensor signal S81. The digital information related to the period of the sensor signal S81 can be obtained by performing corresponding digital calculation on the count value in the digital signal.
Other portions of the analog-to-digital conversion module 800 in fig. 8 (e.g., the clock generator 810 and the counter 820, etc.) may be similar to those described above in connection with fig. 6, and are not described again here.
Fig. 9 shows a schematic diagram of the composition of a sensor system including a multi-channel sensor and a corresponding multi-channel signal acquisition device according to one embodiment of the present disclosure.
As shown in fig. 9, the overall sensor system may include N sensors 961-96N and a corresponding multi-channel signal acquisition device 900 that acquires the N sensor signals S91-S9N. The multi-channel signal acquisition device 900 may employ the analog-to-digital conversion module 920 with various structures as described above to perform analog-to-digital conversion processing on the N sensor signals S91-S9N simultaneously, so as to output N corresponding digital signals D91-D9N. As previously described, the multi-channel signal acquisition device 900 may also include or not include the computing communication module 930 according to actual needs. In addition, as mentioned above, the multi-channel signal acquisition device 900 may also include or not include other circuit modules such as a signal conditioning module, which is not shown in the figure, according to actual requirements. The signal conditioning module may be fabricated as an internal circuit of the sensor or may be fabricated as a circuit module of the multi-channel signal acquisition device or may be eliminated. The signal conditioning module may be fabricated on the same chip or on a different chip than the sensor (or other circuit module) or the multi-channel signal acquisition device (or other circuit module). Those skilled in the art will appreciate that the present invention is not limited in this regard.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. A multichannel signal acquisition device obtains multichannel sensor signals, wherein the multichannel sensor signals are analog signals adopting a time domain signal expression mode and respectively represent sensing results corresponding to a plurality of sensors,
wherein, multichannel signal acquisition equipment includes:
and the analog-to-digital conversion module is configured to convert part or all of the multiple sensor signals into corresponding digital signals in parallel.
2. The multi-channel signal acquisition apparatus according to claim 1, wherein the multi-channel sensor signals are each rectangular-wave voltage signals, and the multi-channel sensor signals each represent a sensing result of a corresponding sensor with information related to a period of the rectangular-wave voltage signals.
3. The multi-channel signal acquisition device of claim 2, wherein the information related to the period of the rectangular wave voltage signal includes an absolute duration of the period, a duty cycle, a ratio between adjacent period durations, or a ratio between differences between adjacent period durations.
4. The multi-channel signal acquisition device of claim 2, wherein the analog-to-digital conversion module comprises a clock generator, a counter, and a plurality of detection sections,
wherein the clock generator is configured to generate a clock signal;
wherein the counter is configured to count the clock signal and output a count value; and
wherein the plurality of detection sections are configured to detect rising and falling edges of the respective multichannel sensor signals, respectively, and record count values at the time of detecting the rising and falling edges.
5. The multi-channel signal acquisition device of claim 4 wherein one of the plurality of detection sections comprises an edge detector and a register,
wherein an output of the edge detector is coupled to a clock pulse input of the register, the count value being input to a data input of the register;
wherein the edge detector is configured to output a pulse signal when both a rising edge and a falling edge of the sensor signal are detected; and
wherein the register is configured to register a count value received at the data input upon receipt of a pulse signal at the clock pulse input.
6. The multi-channel signal acquisition device of claim 1, further comprising:
and the calculation communication module is configured to perform corresponding calculation and communication processing on the digital signal obtained by the analog-to-digital conversion module.
7. The multi-channel signal acquisition device of claim 6, wherein the analog-to-digital conversion module and the computing communication module are integrated onto a main chip, the multi-channel sensor signals sharing the analog-to-digital conversion module and the computing communication module in the main chip.
8. The multi-channel signal acquisition device of any one of claims 1-7, further comprising:
and the time domain signal conditioning modules are configured to respectively receive the output signals of the sensors and respectively condition the output signals into analog voltage signals adopting a time domain signal expression mode to serve as the multi-path sensor signals.
9. A sensor system, comprising:
a plurality of sensors; and
the multi-channel signal acquisition device of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310747098.6A CN116481599A (en) | 2023-06-25 | 2023-06-25 | Multichannel signal acquisition device and sensor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310747098.6A CN116481599A (en) | 2023-06-25 | 2023-06-25 | Multichannel signal acquisition device and sensor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116481599A true CN116481599A (en) | 2023-07-25 |
Family
ID=87223604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310747098.6A Pending CN116481599A (en) | 2023-06-25 | 2023-06-25 | Multichannel signal acquisition device and sensor system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116481599A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10055002A1 (en) * | 2000-11-07 | 2002-05-16 | Infineon Technologies Ag | Device for measuring voltage potentials and analogue electrical signals of an integrated circuit has a multiplexer connected to a large number of measurement points and connected to an analog-digital converter and memory |
| CN201387363Y (en) * | 2009-03-09 | 2010-01-20 | 武汉大学 | Object internal temperature filed distribution measuring instrument |
| CN103344879A (en) * | 2013-05-20 | 2013-10-09 | 南京大全自动化科技有限公司 | Electrical capacity measuring method for quick power source switching apparatus |
| CN203909138U (en) * | 2014-06-18 | 2014-10-29 | 中国航天科技集团公司第九研究院第七七一研究所 | General three-phase AC signal synchronous sampling device |
| CN104656514A (en) * | 2015-01-20 | 2015-05-27 | 成都信升斯科技有限公司 | Intelligent data acquisition system |
| CN105760330A (en) * | 2016-02-22 | 2016-07-13 | 中国兵器工业集团第二四研究所苏州研发中心 | Multichannel frequency acquisition circuit with APB interface |
| CN105911460A (en) * | 2016-06-21 | 2016-08-31 | 电子科技大学 | Multichannel logic analyzer with synchronous signal self-calibration function |
| CN216595446U (en) * | 2021-11-11 | 2022-05-24 | 珠海奔图电子有限公司 | Power failure detection circuit and image forming apparatus |
| CN115509970A (en) * | 2022-10-13 | 2022-12-23 | 成都理工大学 | FPGA multichannel high-speed signal acquisition and processing module |
| CN115808200A (en) * | 2022-11-14 | 2023-03-17 | 南京斯比特电子科技有限公司 | RTU compatible with multiple types of signal sensors and sampling method |
-
2023
- 2023-06-25 CN CN202310747098.6A patent/CN116481599A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10055002A1 (en) * | 2000-11-07 | 2002-05-16 | Infineon Technologies Ag | Device for measuring voltage potentials and analogue electrical signals of an integrated circuit has a multiplexer connected to a large number of measurement points and connected to an analog-digital converter and memory |
| CN201387363Y (en) * | 2009-03-09 | 2010-01-20 | 武汉大学 | Object internal temperature filed distribution measuring instrument |
| CN103344879A (en) * | 2013-05-20 | 2013-10-09 | 南京大全自动化科技有限公司 | Electrical capacity measuring method for quick power source switching apparatus |
| CN203909138U (en) * | 2014-06-18 | 2014-10-29 | 中国航天科技集团公司第九研究院第七七一研究所 | General three-phase AC signal synchronous sampling device |
| CN104656514A (en) * | 2015-01-20 | 2015-05-27 | 成都信升斯科技有限公司 | Intelligent data acquisition system |
| CN105760330A (en) * | 2016-02-22 | 2016-07-13 | 中国兵器工业集团第二四研究所苏州研发中心 | Multichannel frequency acquisition circuit with APB interface |
| CN105911460A (en) * | 2016-06-21 | 2016-08-31 | 电子科技大学 | Multichannel logic analyzer with synchronous signal self-calibration function |
| CN216595446U (en) * | 2021-11-11 | 2022-05-24 | 珠海奔图电子有限公司 | Power failure detection circuit and image forming apparatus |
| CN115509970A (en) * | 2022-10-13 | 2022-12-23 | 成都理工大学 | FPGA multichannel high-speed signal acquisition and processing module |
| CN115808200A (en) * | 2022-11-14 | 2023-03-17 | 南京斯比特电子科技有限公司 | RTU compatible with multiple types of signal sensors and sampling method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100575964C (en) | Be used to measure the instrument of electric power | |
| CN111965447B (en) | Hardware configurable analog signal comprehensive test system | |
| CN103219996A (en) | Pipelined analog-to-digital converter having reduced power consumption | |
| US9173107B2 (en) | Analog front-end circuit for measurement | |
| CN201233288Y (en) | Multipath data acquisition system | |
| CN109696186B (en) | Readout circuit for resistive and capacitive sensors | |
| US7006932B1 (en) | Technique for determining performance characteristics of electronic devices and systems | |
| CN101411056A (en) | Amplifier and method of amplifying an input signal | |
| CN101915869A (en) | Method for reducing measuring error introduced by excitation signal amplitude fluctuations and implementation device | |
| CN215296515U (en) | Pressure detection system | |
| CN106559079B (en) | Signal processing circuit | |
| US6906655B1 (en) | Plural channel analog-to-digital converter, method and meter employing an input channel with a predetermined direct current bias | |
| CN100462725C (en) | Electric power meter | |
| CN116481599A (en) | Multichannel signal acquisition device and sensor system | |
| CN111158291A (en) | High-precision PWM signal generation and detection system based on edge control | |
| EP3236444B1 (en) | Data collection system | |
| US20120084029A1 (en) | Electronic watt-hour meter managing multiple input signals and method of calculating watt-hours | |
| CN103675383B (en) | A kind of circuit measuring waveform | |
| CN212645629U (en) | Magnetic grid ruler signal receiving device | |
| JP2016131316A (en) | Slave for communication | |
| CN201429708Y (en) | Data acquisition system for induction logger | |
| CN201130066Y (en) | Thermal couple measuring apparatus | |
| CN116499500B (en) | Sensor system, sensor, signal output circuit of sensor and signal acquisition equipment | |
| US10778162B1 (en) | Sensing analog signal through digital I/O pins | |
| US20150247885A1 (en) | System comprising a probe and a measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |