CN109799752B - Data acquisition device - Google Patents
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- CN109799752B CN109799752B CN201910035819.4A CN201910035819A CN109799752B CN 109799752 B CN109799752 B CN 109799752B CN 201910035819 A CN201910035819 A CN 201910035819A CN 109799752 B CN109799752 B CN 109799752B
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- 238000012545 processing Methods 0.000 claims abstract description 66
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- 238000002955 isolation Methods 0.000 claims abstract description 26
- 238000013519 translation Methods 0.000 claims abstract description 8
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- 238000013480 data collection Methods 0.000 description 2
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Abstract
The invention provides a data acquisition device, comprising: the input unit comprises a multiplexer, a data cleaner and an ADC; the data cleaner is connected between the multiplexer and the ADC, the ADC is connected with the control unit through a first electrical isolation circuit, and the network communication chip is connected with the control unit through a second electrical isolation circuit; the multi-path selector transmits at least one path of electric analog signal to the data cleaner; the data cleaner obtains at least one path of electrical analog signals after homogenization treatment; the ADC performs analog-to-digital conversion processing on at least one path of homogenized electric analog signals to generate at least one path of digital signals; the control unit is used for carrying out digital quantity translation processing on at least one path of digital signal to generate digital quantity data and sending the digital quantity data to the receiving equipment. The computer is not required to be deployed, and the requirements of special environments can be met.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a data acquisition device.
Background
With the development of communication technology, there is a need to collect data in various environments. Currently, after data is collected and processed by a data collection system, the processed data may be sent to a receiving end, for example, a server.
In the prior art, a hybrid-based computer acquisition system is provided. It is formed from general-purpose computer and single-chip computer which are connected by means of standard bus. The single chip microcomputer and the peripheral circuit thereof are configured specially for the requirements of data acquisition and other functions, and the computer undertakes the tasks of man-machine conversation, large-capacity calculation, recording, printing, graphic display and the like of the data acquisition system.
However, in the prior art, because the single chip microcomputer needs to communicate with the computer through the interface, the computer needs to be deployed in the machine on the acquisition site, and further the requirements of special environments, such as environments for agriculture, gas well monitoring and the like, cannot be met, and the computer is not conveniently arranged in the environments.
Disclosure of Invention
The invention provides a data acquisition device, which is used for solving the problem that a computer is inconvenient to set when data is acquired in the prior art.
The present invention provides a data acquisition apparatus comprising:
the device comprises a control unit, a network communication chip and an input unit, wherein the input unit comprises a multiplexer, a data cleaner and an analog-to-digital converter (ADC);
the data cleaner is connected between the multiplexer and the ADC, the ADC is connected with the control unit through a first electrical isolation circuit, and the network communication chip is connected with the control unit through a second electrical isolation circuit;
the multiplexer is used for receiving an analog input signal output by input equipment, converting the analog input signal into at least one path of electric analog signal and transmitting the at least one path of electric analog signal to the data cleaner;
the data cleaner is configured to perform homogenization processing on the at least one path of electrical analog signal to obtain at least one path of electrical analog signal after homogenization processing, where each of the at least one path of electrical analog signal after homogenization processing has the same amplification factor and offset value, and transmit the at least one path of electrical analog signal after homogenization processing to the ADC;
the ADC is configured to perform analog-to-digital conversion processing on the at least one normalized electrical analog signal to generate at least one digital signal, and transmit the at least one digital signal to the control unit;
and the control unit is used for performing digital quantity translation processing on the at least one path of digital signal to generate digital quantity data and sending the digital quantity data to receiving equipment through the network communication chip.
Further, the apparatus further comprises: an input channel range encoder;
wherein the input channel range encoder is connected between the control unit and the data washer;
the input channel range encoder is used for acquiring the at least one path of electric analog signal in the data cleaner and receiving a processing instruction sent by the control unit; processing the at least one path of electric analog signal according to the processing instruction to obtain at least one path of processed electric analog signal, wherein the signal quantity of each path of electric analog signal of the at least one path of processed electric analog signal is consistent, and transmitting the at least one path of processed electric analog signal to the data cleaner;
the data cleaner is specifically configured to perform homogenization processing on the at least one processed electrical analog signal to obtain at least one homogenized electrical analog signal, and transmit the at least one homogenized electrical analog signal to the ADC.
Further, the data washer is further configured to:
when the measuring ranges of the at least one path of electric analog signal are determined to be inconsistent, sending a feedback message to the control unit through the ADC, wherein the feedback message represents that the measuring ranges of the at least one path of electric analog signal are inconsistent;
the control unit is further configured to send the processing instruction to the input channel range encoder, where the processing instruction includes a correspondence between range information of each channel selector and a semaphore of each circuit of electrical analog signal;
the input channel range encoder is specifically configured to acquire the at least one path of electrical analog signal in the data washer; and processing the at least one path of electric analog signal according to the corresponding relation in the processing instruction to obtain the processed at least one path of electric analog signal.
Further, the feedback message includes a semaphore of each of the at least one path of electrical analog signal;
the control unit is further configured to send the feedback message to the receiving device through the network communication chip;
the receiving device is used for sending the range information of each path selector in the multi-path selectors to the control unit;
the control unit is further configured to perform one-to-one correspondence between the measurement range information of each path of selector and the semaphore of each path of electrical analog signal, so as to obtain the correspondence.
Further, the apparatus further comprises: a watchdog module;
the watchdog module is connected with the control unit;
the watchdog module is used for restarting the control unit when detecting that the control unit is accidentally closed.
Further, the apparatus further comprises: a power supply circuit;
the power circuit is connected with the control unit and the external power supply.
Further, the apparatus further comprises: a direct current chopper;
wherein the direct current chopper is connected at a connection point where the power supply circuit is connected with the control unit;
the direct current chopper is used for adjusting the duty ratio of direct current on the power circuit so as to control the size of effective voltage output to the control unit by the power circuit.
Further, the data washer is connected with the control unit through the first electric isolation circuit;
the control unit is further configured to send a homogenization control instruction to the data cleaner, so that the data cleaner performs homogenization processing on the at least one path of electrical analog signal according to the homogenization control instruction.
Further, the multiplexer is connected with the control unit through the first electrical isolation circuit;
the control unit is further configured to send a selection instruction to the multiplexer, so that the multiplexer selects the analog input signal output by the at least one input device according to the selection instruction.
Further, the network communication chip is a machine-to-machine M2M network communication chip.
The invention has the technical effects that: the data acquisition device is composed of a control unit, a network communication chip and an input unit, wherein the input unit comprises a multiplexer, a data cleaner and an ADC; the data cleaner is connected between the multiplexer and the ADC, the ADC is connected with the control unit through a first electrical isolation circuit, and the network communication chip is connected with the control unit through a second electrical isolation circuit; the multi-path selector is used for receiving the analog input signal output by the input equipment, converting the analog input signal into at least one path of electric analog signal and transmitting the at least one path of electric analog signal to the data cleaner; the data cleaner is used for carrying out homogenization treatment on at least one path of electric analog signal to obtain at least one path of electric analog signal after homogenization treatment, wherein each path of electric analog signal in the at least one path of electric analog signal after the homogenization treatment has the same amplification factor and offset value, and the at least one path of electric analog signal after the homogenization treatment is transmitted to the ADC; the ADC is used for performing analog-to-digital conversion processing on the at least one path of homogenized electric analog signal to generate at least one path of digital signal and transmitting the at least one path of digital signal to the control unit; the control unit is used for performing digital quantity translation processing on at least one path of digital signal to generate digital quantity data and sending the digital quantity data to the receiving equipment through the network communication chip. Therefore, the analog input signal can be processed to obtain digital data of the real environment. The data acquisition device provided by the embodiment is a gateway, and can meet the requirements of special environments, such as agriculture, gas well monitoring and the like, without deploying a computer.
Drawings
Fig. 1 is a schematic structural diagram of a data acquisition device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another data acquisition device according to an embodiment of the present application.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Reference numerals:
11: a control unit; 12: a network communication chip;
13: an input unit; 14: a multiplexer;
15: a data washer; 16: an ADC;
17: a first electrical isolation circuit; 18: a second electrical isolation circuit;
19: an input channel range encoder; 20: a watchdog module;
21: a power supply circuit; 22: a DC chopper.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The specific application scenario of the invention is as follows: with the development of communication technology, there is a need to collect data in various environments. Currently, after data is collected and processed by a data collection system, the processed data may be sent to a receiving end, for example, a server. In the prior art, a hybrid-based computer acquisition system is provided. The computer is formed by connecting a general-purpose computer and a singlechip through a standard bus, wherein the standard bus can adopt an RS-485 standard bus. The single chip microcomputer and the peripheral circuit thereof are configured specially for the requirements of data acquisition and other functions, and the computer undertakes the tasks of man-machine conversation, large-capacity calculation, recording, printing, graphic display and the like of the data acquisition system. However, in the prior art, the single chip microcomputer needs to communicate with the computer through the RS-485 interface, and the computer needs to be deployed in the machine on the acquisition site, so that the requirements of special environments, such as agriculture and gas well monitoring, cannot be met, and the computer is not conveniently arranged in the environments. In addition, data communication using the 433MHz radio method is unstable and susceptible to interference from the surrounding environment.
The invention provides a data acquisition device, and aims to solve the technical problems in the prior art.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a data acquisition device according to an embodiment of the present application. As shown in fig. 1, the apparatus includes:
the device comprises a control unit 11, a network communication chip 12 and an input unit 13, wherein the input unit 13 includes a multiplexer 14, a data cleaner 15 and an Analog-to-Digital Converter (ADC) 16.
The data washer 15 is connected between the multiplexer 14 and the ADC16, the ADC16 is connected to the control unit 11 through the first electrical isolation circuit 17, and the network communication chip 12 is connected to the control unit 11 through the second electrical isolation circuit 18.
The multiplexer 14 is configured to receive the analog input signal output by the input device, convert the analog input signal into at least one electrical analog signal, and transmit the at least one electrical analog signal to the data washer 15.
The data cleaner 15 is configured to perform normalization processing on at least one path of electrical analog signal to obtain at least one path of normalized electrical analog signal, where each of the at least one path of normalized electrical analog signal has the same amplification factor and the same offset value, and transmit the at least one path of normalized electrical analog signal to the ADC 16.
The ADC16 is configured to perform analog-to-digital conversion processing on the at least one normalized electrical analog signal, generate at least one digital signal, and send the at least one digital signal to the control unit 11.
And the control unit 11 is configured to perform digital quantity translation processing on at least one path of digital signal to generate digital quantity data, and send the digital quantity data to the receiving device through the network communication chip 12.
In this embodiment, specifically, the data acquisition apparatus provided in this embodiment is composed of a control unit 11, a network communication chip 12 and an input unit 13, where the input unit 13 includes a multiplexer 14, a data cleaner 15 and an ADC 16.
Connecting the multiplexer 14 to at least one input device; and connects the multiplexer 14 with the data washer 15. The data washer 15 is connected to the ADC 16.
The ADC16 is connected to the control unit 11 via a first electrical isolation circuit 17, and the ADC16 is electrically isolated from the control unit 11. The network communication chip 12 is connected to the control unit 11 through the second electrical isolation circuit 18, and the network communication chip 12 is electrically isolated from the control unit 11.
Each of the at least one input device inputs one path of analog input signal into the multiplexer 14, and the multiplexer 14 obtains the at least one path of analog input signal. For example, the multiplexer 14 acquires eight analog input signals.
The multiplexer 14 converts at least one analog input signal into at least one electrical analog signal, and then the multiplexer 14 transmits the at least one electrical analog signal to the data washer 15.
After receiving the at least one path of electrical analog signal transmitted by the multiplexer 14, the data cleaner 15 performs homogenization processing on the at least one path of electrical analog signal, and then obtains the at least one path of electrical analog signal after the homogenization processing, wherein each path of electrical analog signal in the at least one path of electrical analog signal after the homogenization processing has the same amplification factor and a deviation value; the data scrubber 15 then sends the at least one normalized electrical analog signal to the ADC 16.
After receiving the at least one homogenized electrical analog signal sent by the data cleaner 15, the ADC16 performs analog-to-digital conversion on the at least one homogenized electrical analog signal to generate at least one digital signal; the ADC16 then supplies at least one digital signal to the control unit 11.
After receiving the at least one digital signal sent by the ADC16, the control unit 11 performs digital quantity translation processing on the at least one digital signal, that is, performs translation of the digital quantity sensor value, and further generates digital quantity data.
For example, the control unit 11 translates the digital quantity of sensor data into digital quantity data of the real environment, such as degrees celsius of air temperature or the like.
Then, the control unit 11 sends the digital quantity data to the network communication chip 12; then, the network communication chip 12 transmits the digital quantity data to the receiving device.
For example, the control unit 11 sends the digital data to the server data receiving program through the network communication chip 12.
The embodiment provides a data acquisition device composed of a control unit 11, a network communication chip 12 and an input unit 13, wherein the input unit 13 comprises a multiplexer 14, a data cleaner 15 and an ADC 16; the data cleaner 15 is connected between the multiplexer 14 and the ADC16, the ADC16 is connected with the control unit 11 through a first electric isolation circuit 17, and the network communication chip 12 is connected with the control unit 11 through a second electric isolation circuit 18; the multiplexer 14 is configured to receive an analog input signal output by the input device, convert the analog input signal into at least one path of electrical analog signal, and transmit the at least one path of electrical analog signal to the data cleaner 15; the data cleaner 15 is configured to perform normalization processing on at least one path of electrical analog signal to obtain at least one path of normalized electrical analog signal, where each of the at least one path of normalized electrical analog signal has the same amplification factor and offset value, and transmit the at least one path of normalized electrical analog signal to the ADC 16; the ADC16 is configured to perform analog-to-digital conversion processing on the at least one normalized electrical analog signal to generate at least one digital signal, and send the at least one digital signal to the control unit 11; the control unit 11 is configured to perform digital quantity translation processing on at least one path of digital signal to generate digital quantity data, and send the digital quantity data to the receiving device through the network communication chip 12. Therefore, the analog input signal can be processed to obtain digital data of the real environment. The data acquisition device provided by the embodiment is a gateway, and can meet the requirements of special environments, such as agriculture, gas well monitoring and the like, without deploying a computer.
Fig. 2 is a schematic structural diagram of another data acquisition device according to an embodiment of the present application. On the basis of the embodiment shown in fig. 1, as shown in fig. 2, the apparatus further includes: an input channel range encoder 19; the input channel range encoder 19 is connected between the control unit 11 and the data washer 15.
An input channel range encoder 19, configured to obtain at least one path of electrical analog signal in the data washer 15, and receive a processing instruction sent by the control unit 11; and processing the at least one path of electrical analog signal according to the processing instruction to obtain the processed at least one path of electrical analog signal, wherein the signal quantity of each path of electrical analog signal of the processed at least one path of electrical analog signal is consistent, and transmitting the processed at least one path of electrical analog signal to the data cleaner 15.
The data cleaner 15 is specifically configured to perform homogenization processing on the at least one processed electrical analog signal to obtain at least one normalized electrical analog signal, and transmit the at least one normalized electrical analog signal to the ADC 16.
A data washer 15, further configured to: when determining that the measuring ranges of the at least one path of electrical analog signal are inconsistent, sending a feedback message to the control unit 11 through the ADC16, where the feedback message represents that the measuring ranges of the at least one path of electrical analog signal are inconsistent;
correspondingly, the control unit 11 is further configured to send a processing instruction to the input channel range encoder 19, where the processing instruction includes a corresponding relationship between the range information of each channel selector and the semaphore of each circuit analog signal.
Correspondingly, the input channel range encoder 19 is specifically configured to obtain at least one path of electrical analog signal in the data washer 15; and processing the at least one path of electric analog signal according to the corresponding relation in the processing instruction to obtain the processed at least one path of electric analog signal.
The feedback message includes a semaphore of each of the at least one path of electrical analog signal.
Correspondingly, the control unit 11 is further configured to send a feedback message to the receiving device through the network communication chip 12.
Accordingly, the receiving device is configured to send the range information of each of the multiplexers 14 to the control unit 11.
Correspondingly, the control unit 11 is further configured to perform one-to-one correspondence between the measurement range information of each channel selector and the semaphore of each circuit of electrical analog signal, so as to obtain a corresponding relationship.
The apparatus provided in this embodiment further includes: a watchdog module 20; the watchdog module 20 is connected to the control unit 11.
A watchdog module 20 for restarting the control unit 11 upon detecting that the control unit 11 is accidentally turned off.
The apparatus provided in this embodiment further includes: a power supply circuit 21; the power circuit 21 is connected to the control unit 11, and the power circuit 21 is connected to an external power source.
The apparatus provided in this embodiment further includes: a Direct Current chopper 22(Current Direct/Current Direct, DC/DC for short); the dc chopper 22 is connected to a connection point where the power supply circuit 21 and the control unit 11 are connected.
And a dc chopper 22 for adjusting the duty ratio of the dc power on the power supply circuit 21 to control the magnitude of the effective voltage output by the power supply circuit 21 to the control unit 11.
The data washer 15 is connected with the control unit 11 through a first electrical isolation circuit 17; the control unit 11 is further configured to send a homogenization control instruction to the data cleaner 15, so that the data cleaner 15 performs homogenization processing on at least one path of electrical analog signal according to the homogenization control instruction.
The multiplexer 14 is connected to the control unit 11 via a first electrical isolation circuit 17; the control unit 11 is further configured to send a selection instruction to the multiplexer 14, so that the multiplexer 14 selects the analog input signal output by the at least one input device according to the selection instruction.
The network communication chip 12 is a Machine-to-Machine (M2M) network communication chip 12.
In this embodiment, specifically, the data acquisition apparatus provided in this embodiment further includes an input channel range encoder 19; one end of the input channel range encoder 19 is connected to the control unit 11, and the other end of the input channel range encoder 19 is connected to the data washer 15. The input channel range encoder 19 may acquire at least one path of electrical analog signal in the data washer 15, and receive a processing instruction sent by the control unit 11; the input channel range encoder 19 processes at least one path of electrical analog signal according to the processing instruction to obtain at least one processed path of electrical analog signal, wherein the signal quantity of each path of electrical analog signal of the at least one processed path of electrical analog signal is consistent; the input channel range encoder 19 transmits at least one path of processed electric analog signal to the data cleaner 15; then, the data cleaner 15 performs homogenization processing on the at least one path of processed electrical analog signal to obtain at least one path of normalized electrical analog signal; the data washer 15 transmits the at least one electrical analog signal after the homogenization treatment to the ADC 16. Optionally, the network communication chip 12 is a machine-to-machine M2M network communication chip. Optionally, the control unit 11 is a microprocessor (Advanced RISC Machines, ARM for short), for example, an ARM chip of an ARM using a 32-bit Reduced Instruction Set Computer (Reduced Instruction Set Computer, RISC for short).
Specifically, when determining that the ranges of the at least one path of electrical analog signal are inconsistent, the data scrubber 15 sends a feedback message to the ADC16, where the feedback message indicates that the ranges of the at least one path of electrical analog signal are inconsistent; then, the ADC16 sends a feedback message to the control unit 11. Then, after the control unit 11 receives the feedback message sent by the ADC16, the control unit 11 sends a processing instruction to the input channel range encoder 19, where the processing instruction includes a correspondence relationship between the range information of each selector and the semaphore of each circuit analog signal. Then, the input channel range encoder 19 has already acquired at least one path of electrical analog signal in the data washer 15, so that after the input channel range encoder 19 receives the processing instruction sent by the control unit 11, the input channel range encoder 19 may process the at least one path of electrical analog signal according to the corresponding relationship in the processing instruction, so as to obtain at least one processed electrical analog signal. Then, the input channel range encoder 19 transmits at least one path of processed electrical analog signal to the data washer 15; the data cleaner 15 may perform homogenization processing on the at least one processed electrical analog signal to obtain at least one normalized electrical analog signal, and transmit the at least one normalized electrical analog signal to the ADC 16.
Or, when determining that the ranges of the at least one path of electrical analog signal are not consistent, the data scrubber 15 sends a feedback message to the ADC16, where the feedback message represents that the ranges of the at least one path of electrical analog signal are not consistent, and the feedback message includes a semaphore of each path of electrical analog signal in the at least one path of electrical analog signal; then, the ADC16 sends a feedback message to the control unit 11. Then, the control unit 11 sends the feedback message to the network communication chip 12, and the network communication chip 12 sends the feedback message to the receiving device. The receiving apparatus then transmits the range information of each of the multiplexers 14 to the control unit 11 after receiving the feedback message. Then, since the control unit 11 obtains the semaphore of each electrical analog signal in the at least one path of electrical analog signals, the control unit 11 can make the range information of each path of selector correspond to the semaphore of each path of electrical analog signals one to one, so as to obtain a corresponding relationship. Then, the control unit 11 sends a processing instruction including the correspondence between the range information of each of the selectors and the semaphore of each of the circuit analog signals to the input channel range encoder 19. Then, the input channel range encoder 19 has already acquired at least one path of electrical analog signal in the data washer 15, so that after the input channel range encoder 19 receives the processing instruction sent by the control unit 11, the input channel range encoder 19 may process the at least one path of electrical analog signal according to the corresponding relationship in the processing instruction, so as to obtain at least one processed electrical analog signal. Then, the input channel range encoder 19 transmits at least one path of processed electrical analog signal to the data washer 15; the data cleaner 15 may perform homogenization processing on the at least one processed electrical analog signal to obtain at least one normalized electrical analog signal, and transmit the at least one normalized electrical analog signal to the ADC 16.
The data acquisition device provided by the embodiment further comprises a watchdog module 20, a direct current chopper 22 and a power circuit 21; connecting the watchdog module 20 with the control unit 11; the power supply circuit 21 is connected with the control unit 11, and the power supply circuit 21 is connected with an external power supply; the dc chopper 22 is connected to a connection point where the power supply circuit 21 and the control unit 11 are connected. So that an external power supply can provide power to the various structures in the data acquisition device via power supply circuit 21. The watchdog module 20 may restart the control unit 11 upon detecting that the control unit 11 was accidentally turned off. The dc chopper 22 can adjust the duty ratio of the dc power on the power supply circuit 21, thereby controlling the magnitude of the effective voltage output from the power supply circuit 21 to the control unit 11.
Also, as shown in fig. 2, the data washer 15 may be connected to the control unit 11 through a first electrical isolation circuit 17; therefore, the control unit 11 can send a homogenization control instruction to the data washer 15, and then the data washer 15 performs homogenization processing on at least one path of electrical analog signal according to the homogenization control instruction. As shown in fig. 2, the multiplexer 14 may be connected to the control unit 11 through a first electrical isolation circuit 17; the control unit 11 can send a selection instruction to the multiplexer 14, so that the multiplexer 14 selects the analog input signal output by at least one input device according to the selection instruction, that is, the multiplexer 14 selects which of the analog input signals output by the input devices, where one of the input devices outputs one of the analog input signals.
In this embodiment, a data acquisition device is provided, which is composed of a power circuit 21, an input unit 13, an input channel range encoder 19, a control unit 11, and a network communication chip 12, wherein the power circuit 21 is connected to the control unit 11, the input unit 13 is connected to the control unit 11 through a first electrical isolation circuit 17, and the network communication chip 12 is connected to the control unit 11 through a second electrical isolation circuit 18; the input unit 13 includes a multiplexer 14, a data washer 15, and an ADC 16; the ADC16 is connected to the control unit 11 via a first electrical isolation circuit 17. Therefore, analog input signals can be processed to obtain digital data of a real environment; and when the signal quantity of the at least one path of electric analog signal is inconsistent, the signal quantity of the at least one path of electric analog signal can be adjusted. Therefore, the provided gateway does not need to be provided with a computer, and can meet the requirements of special environments, such as agriculture, gas well monitoring and the like; in addition, the M2M network communication chip is used for data communication, the interface of the M2M network communication chip has strong anti-interference capability, the influence of industrial field signals on the communication interface of the microcontroller can be avoided, and the data communication is stable; moreover, a watchdog module 20 is provided, and when the gateway is abnormal, the gateway is restarted; the DC/DC can carry out overvoltage and overcurrent protection on the gateway.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. A data acquisition device, comprising:
the device comprises a control unit, a network communication chip and an input unit, wherein the input unit comprises a multiplexer, a data cleaner and an analog-to-digital converter (ADC);
the data cleaner is connected between the multiplexer and the ADC, the ADC is connected with the control unit through a first electrical isolation circuit, and the network communication chip is connected with the control unit through a second electrical isolation circuit;
the multiplexer is used for receiving an analog input signal output by input equipment, converting the analog input signal into at least one path of electric analog signal and transmitting the at least one path of electric analog signal to the data cleaner;
the data cleaner is configured to perform homogenization processing on the at least one path of electrical analog signal to obtain at least one path of electrical analog signal after homogenization processing, where each of the at least one path of electrical analog signal after homogenization processing has the same amplification factor and offset value, and transmit the at least one path of electrical analog signal after homogenization processing to the ADC;
the ADC is configured to perform analog-to-digital conversion processing on the at least one normalized electrical analog signal to generate at least one digital signal, and transmit the at least one digital signal to the control unit;
the control unit is used for performing digital quantity translation processing on the at least one path of digital signal to generate digital quantity data and sending the digital quantity data to receiving equipment through the network communication chip;
the device, still include: an input channel range encoder;
wherein the input channel range encoder is connected between the control unit and the data washer;
the input channel range encoder is used for acquiring the at least one path of electric analog signal in the data cleaner and receiving a processing instruction sent by the control unit; processing the at least one path of electric analog signal according to the processing instruction to obtain at least one path of processed electric analog signal, wherein the signal quantity of each path of electric analog signal of the at least one path of processed electric analog signal is consistent, and transmitting the at least one path of processed electric analog signal to the data cleaner;
the data cleaner is specifically configured to perform homogenization processing on the at least one processed electrical analog signal to obtain at least one homogenized electrical analog signal, and transmit the at least one homogenized electrical analog signal to the ADC;
the data washer is further configured to:
when the measuring ranges of the at least one path of electric analog signal are determined to be inconsistent, sending a feedback message to the control unit through the ADC, wherein the feedback message represents that the measuring ranges of the at least one path of electric analog signal are inconsistent;
the control unit is further configured to send the processing instruction to the input channel range encoder, where the processing instruction includes a correspondence between range information of each channel selector and a semaphore of each circuit of electrical analog signal;
the input channel range encoder is specifically configured to acquire the at least one path of electrical analog signal in the data washer; and processing the at least one path of electric analog signal according to the corresponding relation in the processing instruction to obtain the processed at least one path of electric analog signal.
2. The apparatus according to claim 1, wherein the feedback message includes a semaphore for each of the at least one electrical analog signal;
the control unit is further configured to send the feedback message to the receiving device through the network communication chip;
the receiving device is used for sending the range information of each path selector in the multi-path selectors to the control unit;
the control unit is further configured to perform one-to-one correspondence between the measurement range information of each path of selector and the semaphore of each path of electrical analog signal, so as to obtain the correspondence.
3. The apparatus of claim 1, further comprising: a watchdog module;
the watchdog module is connected with the control unit;
the watchdog module is used for restarting the control unit when detecting that the control unit is accidentally closed.
4. The apparatus of claim 1, further comprising: a power supply circuit;
the power circuit is connected with the control unit and the external power supply.
5. The apparatus of claim 4, further comprising: a direct current chopper;
wherein the direct current chopper is connected at a connection point where the power supply circuit is connected with the control unit;
the direct current chopper is used for adjusting the duty ratio of direct current on the power circuit so as to control the size of effective voltage output to the control unit by the power circuit.
6. The device according to any one of claims 1 to 5, wherein the data washer is connected to the control unit via the first electrically isolated circuit;
the control unit is further configured to send a homogenization control instruction to the data cleaner, so that the data cleaner performs homogenization processing on the at least one path of electrical analog signal according to the homogenization control instruction.
7. The device according to any of claims 1-5, wherein said multiplexer is connected to said control unit via said first electrical isolation circuit;
the control unit is further configured to send a selection instruction to the multiplexer, so that the multiplexer selects the analog input signal output by the at least one input device according to the selection instruction.
8. The device of any one of claims 1-5, wherein the network communication chip is a machine-to-machine M2M network communication chip.
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