CN220020393U - Multichannel signal acquisition device - Google Patents
Multichannel signal acquisition device Download PDFInfo
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- CN220020393U CN220020393U CN202321038784.8U CN202321038784U CN220020393U CN 220020393 U CN220020393 U CN 220020393U CN 202321038784 U CN202321038784 U CN 202321038784U CN 220020393 U CN220020393 U CN 220020393U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 116
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 16
- 238000001514 detection method Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a multichannel signal acquisition device, which comprises a HUB board, a 485 conversion card and a plurality of analog-to-digital conversion cards; the analog-to-digital conversion card is used for converting an analog signal input through the HUB board into a digital signal, and the generated analog signal is a sensor signal at the near end; the 485 conversion card is used for converting a digital signal input through the HUB board into a 485 signal; the HUB board is used for outputting 485 signals to the remote controller. According to the utility model, the problems of high summarizing hardware cost, wiring cost and unstable system performance existing when the output signals of the existing gas alarms are locally summarized can be effectively solved.
Description
Technical Field
The utility model belongs to the technical field of signal input, and particularly relates to a multichannel signal acquisition device.
Background
The gas alarm is a gas leakage detection alarm instrument. The gas alarm is arranged at a detection point in the environment to be detected and is used for detecting the numerical content of the gas in the environment. In a corresponding scene, a plurality of gas alarms are often required to be arranged at a plurality of detection points, and in order to collect and detect corresponding data of the gas alarms at the plurality of detection points, one common method at present is to add a plurality of analog-digital conversion cards and 485 conversion cards corresponding to the gas alarms, and then carry out corresponding collection monitoring through multi-line collection and access to a controller so as to meet the multi-point detection of the gas alarms. The summarizing and detecting method has higher hardware cost and wiring cost, can not summarize a large amount of data of the gas alarms due to the limitation of wiring space, and has unstable system circuit performance.
Disclosure of Invention
The utility model aims to solve the problems of high summarizing hardware cost, high wiring cost and unstable system performance existing when output signals based on a plurality of existing gas alarms are locally summarized 。
In order to achieve the above object, according to the present utility model, there is provided a multi-channel signal acquisition device, which includes a HUB board, a 485 conversion card, and a plurality of analog-to-digital conversion cards;
the analog-to-digital conversion card is used for converting an analog signal input through the HUB board into a digital signal, and the analog signal is an output signal of the near-end sensor;
the 485 conversion card is used for converting the digital signal input through the HUB board into a 485 signal;
the HUB board is used for outputting the 485 signal to a remote controller.
Optionally, the HUB board includes a 485 board terminal and a plurality of analog to digital conversion card terminals;
the analog-digital conversion card terminals are electrically connected with the analog-digital conversion cards one by one, and the input ends and the output ends of the analog-digital conversion card terminals are connected with the 485 board terminals.
Optionally, the HUB board further includes an address dial switch circuit;
the address dial switch circuit is connected to the analog-to-digital conversion card terminal and is used for setting the address code of the analog-to-digital conversion card.
Optionally, the 485 conversion card comprises a 485 module and a serial-parallel conversion chip;
the 485 module is used for converting the input digital signal into the 485 signal;
one end of the serial-parallel conversion chip is connected with the 485 module, and the other end of the serial-parallel conversion chip is connected with the 485 board terminal; the serial-parallel conversion chip is used for completing conversion between the serial transmission mode and the parallel transmission mode of the 485 signal.
Optionally, the 485 conversion card further comprises a stabilized power supply circuit, a filter circuit and an isolation power supply circuit;
the stabilized power supply circuit and the filter circuit are used for providing 5V and 3V working voltages required by the 485 conversion card;
the isolated power supply circuit is used to create a safe isolated space to reduce or eliminate interference between ac and dc voltages.
Optionally, the analog-to-digital conversion card comprises a control chip, an output control circuit and a terminal;
the control chip converts the analog signal into the digital signal and transmits the digital signal to the HUB board through the output control circuit; the control chip is also provided with a memory and a crystal oscillator which are matched with the control chip;
one end of the terminal is electrically connected with the analog-digital conversion card terminal, and the other end of the terminal is electrically connected with the control chip;
and the fuse of the output control circuit is used for ensuring the safety of the analog-digital conversion card.
Optionally, the analog-to-digital conversion card further comprises an analog-to-digital conversion card filter circuit and a power supply conversion circuit;
the analog-digital conversion card filter circuit and the power supply conversion circuit are respectively connected to the terminals and used for providing 5V and 3V working voltages required by the analog-digital conversion card.
Optionally, the analog-digital conversion card further comprises a current-voltage conversion circuit and a relay input circuit, wherein the input ends of the current-voltage conversion circuit and the relay input circuit are connected to the terminal, and the output ends of the current-voltage conversion circuit and the relay input circuit are connected to the control chip.
The utility model has the beneficial effects that:
the utility model discloses a multichannel signal acquisition device, wherein a plurality of analog-to-digital conversion card terminals electrically connected with a gas alarm are arranged on a HUB board, the analog-to-digital conversion card terminals are connected with an analog-to-digital conversion card, an analog signal input by the gas alarm is transmitted to the analog-to-digital conversion card through the HUB board to be converted into a digital signal, the digital signal is input to the 485 board through a 485 board terminal arranged on the HUB board, the 485 board converts the digital signal into a 485 signal, and the 485 signal is transmitted to a controller through a bus on the HUB board, so that the real-time monitoring of the operation of a plurality of gas alarms is realized. The traditional summarizing mode is as follows: when the multichannel signal acquisition device is used for gathering analog signals of a plurality of gas alarms, the hardware cost and the wiring cost are reduced, and the stability of a system is greatly improved.
According to the above, the multichannel signal acquisition device effectively solves the problems of high summarizing hardware cost, high wiring cost and unstable system performance existing when output signals based on the existing multiple gas alarms are locally summarized.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The utility model may be better understood by referring to the following description in conjunction with the accompanying drawings in which the same or similar reference numerals are used throughout the several drawings to designate the same or similar components.
Fig. 1 shows a functional block diagram of a multichannel signal acquisition device according to an embodiment of the utility model;
fig. 2 shows a circuit diagram of a 485 board terminal according to an embodiment of the utility model;
FIG. 3 shows a circuit diagram of an analog to digital conversion card terminal according to an embodiment of the present utility model;
FIG. 4 shows a circuit diagram of an address dial switch circuit according to an embodiment of the utility model;
fig. 5 shows a circuit diagram of a 485 module according to an embodiment of the utility model;
fig. 6 shows a circuit diagram of a serial-parallel conversion chip according to an embodiment of the present utility model;
fig. 7 shows a circuit diagram of a regulated power supply circuit and a filter circuit according to an embodiment of the utility model;
FIG. 8 shows a circuit diagram of an isolated power supply circuit according to an embodiment of the utility model;
FIG. 9 shows a circuit diagram of a control chip and crystal oscillator according to an embodiment of the utility model;
FIG. 10 shows a circuit diagram of a memory according to an embodiment of the utility model;
fig. 11 shows a circuit diagram of an output control circuit according to an embodiment of the utility model;
fig. 12 shows a circuit diagram of a terminal according to an embodiment of the utility model;
FIG. 13 shows a circuit diagram of an analog to digital conversion card filter circuit and a power conversion circuit according to an embodiment of the present utility model;
fig. 14 shows a circuit diagram of a current-voltage conversion circuit according to an embodiment of the present utility model;
fig. 15 shows a circuit diagram of a relay input circuit according to an embodiment of the utility model.
Detailed Description
In order that those skilled in the art will more fully understand the technical solutions of the present utility model, exemplary embodiments of the present utility model will be described more fully and in detail below with reference to the accompanying drawings. It should be apparent that the following description of one or more embodiments of the utility model is merely one or more of the specific ways in which the technical solutions of the utility model may be implemented and is not intended to be exhaustive. It should be understood that the technical solution of the present utility model may be implemented in other ways belonging to one general inventive concept, and should not be limited by the exemplary described embodiments. All other embodiments, which may be made by one or more embodiments of the utility model without inventive faculty, are intended to be within the scope of the utility model.
Examples: fig. 1 shows a functional block diagram of a multi-channel signal acquisition device according to an embodiment of the present utility model, referring to fig. 1, the multi-channel signal acquisition device of the embodiment of the present utility model includes a HUB board, a 485 conversion card, and a plurality of analog-to-digital conversion cards;
the analog-to-digital conversion card is used for converting an analog signal input through the HUB board into a digital signal, and the generated analog signal is a sensor signal at the near end;
the 485 conversion card is used for converting a digital signal input through the HUB board into a 485 signal;
the HUB board is used for outputting 485 signals to the remote controller.
Further, in an embodiment of the present utility model, referring to fig. 2 and 3, the hub board includes a 485 board terminal and a plurality of analog-to-digital conversion card terminals;
the analog-digital conversion card terminals are electrically connected with the analog-digital conversion cards one by one, and the input ends and the output ends of the analog-digital conversion card terminals are connected with the 485 board terminals.
Still further, in an embodiment of the present utility model, referring to fig. 4, the hub board further includes an address dial switch circuit;
the address dial switch circuit is connected with the analog-digital conversion card terminal and is used for setting the address code of the analog-digital conversion card.
Specifically, the HUB board further comprises a power supply terminal circuit, a power supply reverse connection preventing circuit and a grounding circuit; the power supply terminal circuit is connected with the 485 board terminal and is used for inputting a power supply; the power supply reverse connection preventing circuit is connected to the 485 board terminal and used for circuit protection; the ground circuit is used for loops of analog signals and digital signals.
Still further, in an embodiment of the present utility model, referring to fig. 5 and 6, the 485 conversion card includes a 485 module and a serial-parallel conversion chip;
the 485 module is used for converting an input digital signal into a 485 signal;
one end of the serial-parallel conversion chip is connected with the 485 module, and the other end of the serial-parallel conversion chip is connected with the 485 board terminal; the serial-parallel conversion chip is used for completing conversion between the serial transmission mode and the parallel transmission mode of 485 signals.
Still further, in an embodiment of the present utility model, referring to fig. 7 and 8, the 485 conversion card further includes a voltage stabilizing power circuit, a filtering circuit and an isolation power circuit;
the stabilized power supply circuit and the filter circuit are used for providing 5V and 3V working voltages required by the 485 conversion card;
the isolated power supply circuit is used to create a safe isolated space to reduce or eliminate interference between ac and dc voltages.
Specifically, the 485 conversion card also comprises a receiving and transmitting state indicator lamp circuit and a power supply state indicator lamp circuit;
the receiving and transmitting state indicator lamp circuit is connected with the 485 module and used for receiving and transmitting monitoring of signal transmission; the power supply state indicator lamp circuit is connected to the 485 module and used for monitoring voltage input.
Still further, in an embodiment of the present utility model, referring to fig. 9 to 12, an analog-to-digital conversion card includes a control chip, an output control circuit, and terminals;
the control chip converts the analog signal into a digital signal and transmits the digital signal to the HUB board through the output control circuit; the control chip is also provided with a memory and a crystal oscillator which are matched with the control chip;
one end of the terminal is electrically connected with the analog-digital conversion card terminal, and the other end of the terminal is electrically connected with the control chip;
and the fuse of the output control circuit is used for ensuring the safety of the analog-digital conversion card.
Still further, in an embodiment of the present utility model, referring to fig. 13, the analog-to-digital conversion card further includes an analog-to-digital conversion card filter circuit and a power conversion circuit; the analog-digital conversion card filter circuit and the power supply conversion circuit are respectively connected to the terminals and used for providing 5V and 3V working voltages required by the analog-digital conversion card.
Still further, in an embodiment of the present utility model, referring to fig. 14 and 15, the analog-to-digital conversion card further includes a current-voltage conversion circuit and a relay input circuit; the input ends of the current-voltage conversion circuit and the relay input circuit are connected to the terminals, and the output ends of the current-voltage conversion circuit and the relay input circuit are connected to the control chip.
Specifically, the analog-to-digital conversion card also comprises a jumper switch, a 485 communication indicator light circuit, an indicator light driving module circuit, a programming port circuit and a wiring display debugging port circuit; the two jumper switches are respectively connected with pins 26 and 27 of the control chip, so that the circuit can be conveniently disconnected and connected when required;
the 485 communication indicator lamp circuit is connected to the pin 30 of the control chip and used for monitoring the working state of the control chip; the indicator light driving module circuit is connected to a pin 39 of the control chip; the programming port circuit is connected with pins 34 and 37 of the control chip and is used for programming or modifying the data format of the circuit; the wiring display debugging port circuit is connected with pins 18 and 19 of the control chip and used for debugging the 485 board.
Specifically, 16 analog-digital conversion card terminals are built on the HUB board, 16 analog-digital conversion cards are inserted into the 16 analog-digital conversion card terminals and used for converting analog signals input by 16 gas alarms into digital signals, the digital signals are transmitted to the 485 conversion card through a 485 board terminal on the HUB board, the digital signals are converted into 485 signals through the 485 conversion card and are finally transmitted to a remote controller through the HUB board, and the gas environment values detected by the 16 gas alarms correspondingly are realized; in addition, the analog-digital conversion card is designed to be detachable, and can be replaced or adaptively increased or reduced according to the needs.
Although one or more embodiments of the present utility model have been described above, it will be appreciated by those of ordinary skill in the art that the utility model can be embodied in any other form without departing from the spirit or scope thereof. The above-described embodiments are therefore intended to be illustrative rather than limiting, and many modifications and substitutions will now be apparent to those of ordinary skill in the art without departing from the spirit and scope of the present utility model as defined in the appended claims.
Claims (8)
1. The multichannel signal acquisition device is characterized by comprising a HUB board, a 485 conversion card and a plurality of analog-to-digital conversion cards;
the analog-to-digital conversion card is used for converting an analog signal input through the HUB board into a digital signal, and the analog signal is an output signal of the near-end sensor;
the 485 conversion card is used for converting the digital signal input through the HUB board into a 485 signal;
the HUB board is used for outputting the 485 signal to a remote controller.
2. The multi-channel signal acquisition device of claim 1, wherein the HUB board comprises a 485 board terminal and a plurality of analog-to-digital conversion card terminals;
the analog-digital conversion card terminals are electrically connected with the analog-digital conversion cards one by one, and the input ends and the output ends of the analog-digital conversion card terminals are connected with the 485 board terminals.
3. The multi-channel signal acquisition device of claim 2, wherein the HUB board further comprises an address dial switch circuit;
the address dial switch circuit is connected to the analog-to-digital conversion card terminal and is used for setting the address code of the analog-to-digital conversion card.
4. The multi-channel signal acquisition device of claim 2, wherein the 485 conversion card comprises a 485 module and a serial-parallel conversion chip;
the 485 module is used for converting the input digital signal into the 485 signal;
one end of the serial-parallel conversion chip is connected with the 485 module, and the other end of the serial-parallel conversion chip is connected with the 485 board terminal; the serial-parallel conversion chip is used for completing conversion between the serial transmission mode and the parallel transmission mode of the 485 signal.
5. The multi-channel signal acquisition device of claim 4, wherein the 485 conversion card further comprises a voltage stabilizing power supply circuit, a filter circuit and an isolation power supply circuit;
the stabilized power supply circuit and the filter circuit are used for providing 5V and 3V working voltages required by the 485 conversion card;
the isolated power supply circuit is used to create a safe isolated space to reduce or eliminate interference between ac and dc voltages.
6. The multi-channel signal acquisition device of claim 1, wherein the analog-to-digital conversion card comprises a control chip, an output control circuit, and terminals;
the control chip converts the analog signal into the digital signal and transmits the digital signal to the HUB board through the output control circuit; the control chip is also provided with a memory and a crystal oscillator which are matched with the control chip;
one end of the terminal is electrically connected with the analog-digital conversion card terminal, and the other end of the terminal is electrically connected with the control chip;
and the fuse of the output control circuit is used for ensuring the safety of the analog-digital conversion card.
7. The multi-channel signal acquisition device of claim 6, wherein the analog-to-digital conversion card further comprises an analog-to-digital conversion card filter circuit and a power conversion circuit;
the analog-to-digital conversion card filter circuit and the power supply conversion circuit are used for providing 5V and 3V working voltages required by the analog-to-digital conversion card.
8. The multi-channel signal acquisition device of claim 6, wherein the analog-to-digital conversion card further comprises a current-to-voltage conversion circuit and a relay input circuit, wherein the input ends of the current-to-voltage conversion circuit and the relay input circuit are connected to the terminals, and the output ends of the current-to-voltage conversion circuit and the relay input circuit are connected to the control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321038784.8U CN220020393U (en) | 2023-05-04 | 2023-05-04 | Multichannel signal acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321038784.8U CN220020393U (en) | 2023-05-04 | 2023-05-04 | Multichannel signal acquisition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220020393U true CN220020393U (en) | 2023-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321038784.8U Active CN220020393U (en) | 2023-05-04 | 2023-05-04 | Multichannel signal acquisition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220020393U (en) |
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2023
- 2023-05-04 CN CN202321038784.8U patent/CN220020393U/en active Active
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