CN202906875U - Industrial instrument with signal isolation among multipath acquisition channels - Google Patents
Industrial instrument with signal isolation among multipath acquisition channels Download PDFInfo
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- CN202906875U CN202906875U CN 201220619025 CN201220619025U CN202906875U CN 202906875 U CN202906875 U CN 202906875U CN 201220619025 CN201220619025 CN 201220619025 CN 201220619025 U CN201220619025 U CN 201220619025U CN 202906875 U CN202906875 U CN 202906875U
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- industrial instrument
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- light coupling
- mcu
- coupling relay
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Abstract
The utility model relates to an industrial instrument with signal isolation among multipath acquisition channels. The industrial instrument comprises a MCU of the industrial instrument. The industrial instrument is characterized by also comprising a plurality of paths of opto-coupler relays, wherein a control end of the plurality of paths of opto-coupler relays is connected with an IO port of the MCU, a differential amplification circuit, and an A/D module. An input end of the differential amplification circuit is connected with output ends of the plurality of paths of opto-coupler relays. An output end of the differential amplification circuit is connected with an input port of the A/D module. The output end and the control end of the A/D module are connected with I/O ports of the MCU. The industrial instrument adds the opto-coupler relays among the multipath acquisition channels to isolate different signals, and problems of signal acquisition interference and input of multipath differential signals connected in series are solved preferably. Incensement of cost is relatively low, occupation of a PCB board is relatively small, and practicality is relatively high.
Description
Technical field
The utility model relates to a kind of industrial instrument with the isolation of multi pass acquisition interchannel signal.
Background technology
Between the interference signal that industrial instrument ubiquity with multi pass acquisition semiotic function causes owing to the restriction of the aspects such as environment for use, technological process or single channel and the one-channel signal because the interference that the aspect factors such as wiring, welding cause.When interference signal by altogether, the modes such as string mould, coupling are taken as and tend to after the normal signal collection enters instrument to cause to calculate, deviation or even the accident of control etc.How eliminating this interference is the problem that needs solve.Reach and how to realize the input of multiple series series differential signal.
Summary of the invention
In view of this, the purpose of this utility model provides a kind of industrial instrument with the isolation of multi pass acquisition interchannel signal, and the interference problem that can overcome the multiplexed signal sampling existence can realize again the input of multiple series series differential signal.
The utility model adopts following scheme to realize: a kind of industrial instrument with the isolation of multi pass acquisition interchannel signal, comprise it is characterized in that the MCU of industrial instrument, and also comprise:
The multichannel light coupling relay, the control end of described multichannel light coupling relay is connected with the IO mouth of described MCU;
One differential amplifier circuit, the output of described differential amplifier circuit is connected with A/D module input mouth, and described A/D module output, control end are connected the I/O mouth and connect with described MCU.
In the utility model one embodiment, described MCU is connected with described A/D module through SPI or iic bus.
In the utility model one embodiment, described light coupling relay has switch S 1, S2, S3 and S4, and wherein the output of the switch S 1 of each road light coupling relay links to each other, and the output of the switch S 2 of each road light coupling relay links to each other; The output of the switch S 4 of each road light coupling relay links to each other; The output that the output of the switch S 2 of described light coupling relay is connected with switch S is connected with described differential amplifier circuit.
The utility model adopts in multi pass acquisition interchannel increase light coupling relay and makes the unlike signal isolation, solved the signal interference problem that exists in the multiplexed signal sampling process and realized the input of multiple series series differential signal, and circuit structure is simple, the cost increase is less, pcb board take less, practicality is higher.
Description of drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the physical circuit connection diagram of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in Figure 1, present embodiment provides a kind of industrial instrument with the isolation of multi pass acquisition interchannel signal, comprises the MCU of industrial instrument, it is characterized in that, also comprise: the multichannel light coupling relay, the control end of described multichannel light coupling relay is connected with the IO mouth of described MCU; The control end of described multichannel light coupling relay is connected with the IO mouth of described MCU; One differential amplifier circuit, the output of described differential amplifier circuit is connected with A/D module input mouth, and described A/D module output, control end are connected the I/O mouth and connect with described MCU.
Concrete, seeing also Fig. 2, Fig. 2 is the physical circuit connection diagram of the utility model embodiment.Here be noted that in the utility model about other some circuit modules of industrial instrument just not explain (also not drawing among the figure), only provided the MCU of this industrial instrument among the figure.As we know from the figure, this MCU is connected with described A/D module through SPI or iic bus.Described light coupling relay has switch S 1, S2, S3 and S4, and wherein the output of the switch S 1 of each road light coupling relay links to each other, and the output of the switch S 2 of each road light coupling relay links to each other; The output of the switch S 4 of each road light coupling relay links to each other; The output that the output of the switch S 2 of described light coupling relay is connected with switch S is connected with described differential amplifier circuit.When MCU will measure first via collection value, disconnect the signaling switch on other roads by the IO data port, only control the 1 tunnel signal and enter Acquisition Circuit, make the 1 tunnel collection signal and the not contact of other each roads.MCU is according to the folding of the S1-S4 of the light coupling relay CH1 of the 1 tunnel signal type (V/I/TC/RTD) control the 1 tunnel collection that gathers, 2 slotted lines of gating amplify input A/D chip through differential amplifier circuit with the Gather and input signal in the mode of differential amplification signal, that data acquisition is complete by interrupt mode notice MCU after A/D has gathered a certain amount of data by the order of MCU, this moment MCU by SPI or iic bus with data reading.The rest may be inferred, progressively carries out the folding control of each light coupling relay, realizes the signals collecting on other each roads.
The above only is preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (3)
1. one kind has the industrial instrument that multi pass acquisition interchannel signal is isolated, and comprises the MCU of industrial instrument, it is characterized in that, also comprises:
The multichannel light coupling relay, the control end of described multichannel light coupling relay is connected with the IO mouth of described MCU;
One differential amplifier circuit, the input of this differential amplifier circuit is connected with the output of described multichannel light coupling relay; And an A/D module, the output of described differential amplifier circuit is connected with A/D module input mouth, and described A/D module output, control end are connected the I/O mouth and connect with described MCU.
2. the industrial instrument with multi pass acquisition interchannel signal isolation according to claim 1, it is characterized in that: described MCU is connected with described A/D module through SPI or iic bus.
3. the industrial instrument with multi pass acquisition interchannel signal isolation according to claim 1, it is characterized in that: described light coupling relay has switch S 1, S2, S3 and S4, wherein the output of the switch S 1 of each road light coupling relay links to each other, and the output of the switch S 2 of each road light coupling relay links to each other; The output of the switch S 4 of each road light coupling relay links to each other; The output that the output of the switch S 2 of described light coupling relay is connected with switch S is connected with described differential amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619025 CN202906875U (en) | 2012-11-21 | 2012-11-21 | Industrial instrument with signal isolation among multipath acquisition channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619025 CN202906875U (en) | 2012-11-21 | 2012-11-21 | Industrial instrument with signal isolation among multipath acquisition channels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202906875U true CN202906875U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220619025 Expired - Lifetime CN202906875U (en) | 2012-11-21 | 2012-11-21 | Industrial instrument with signal isolation among multipath acquisition channels |
Country Status (1)
| Country | Link |
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| CN (1) | CN202906875U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104598413A (en) * | 2014-12-31 | 2015-05-06 | 深圳怡化电脑股份有限公司 | Multichannel data management circuit and method |
| CN105527893A (en) * | 2015-12-10 | 2016-04-27 | 湖南先步信息股份有限公司 | Anti-interference multi-channel analog sampling circuit and method |
| CN108333408A (en) * | 2017-12-07 | 2018-07-27 | 安徽贵博新能科技有限公司 | A kind of electric automobile power battery group series connection total voltage Acquisition Circuit |
-
2012
- 2012-11-21 CN CN 201220619025 patent/CN202906875U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104598413A (en) * | 2014-12-31 | 2015-05-06 | 深圳怡化电脑股份有限公司 | Multichannel data management circuit and method |
| CN105527893A (en) * | 2015-12-10 | 2016-04-27 | 湖南先步信息股份有限公司 | Anti-interference multi-channel analog sampling circuit and method |
| CN108333408A (en) * | 2017-12-07 | 2018-07-27 | 安徽贵博新能科技有限公司 | A kind of electric automobile power battery group series connection total voltage Acquisition Circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |
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| CX01 | Expiry of patent term |