CN201937616U - Data acquisition system facilitating realization of RS485 bus networking - Google Patents
Data acquisition system facilitating realization of RS485 bus networking Download PDFInfo
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- CN201937616U CN201937616U CN2010206691725U CN201020669172U CN201937616U CN 201937616 U CN201937616 U CN 201937616U CN 2010206691725 U CN2010206691725 U CN 2010206691725U CN 201020669172 U CN201020669172 U CN 201020669172U CN 201937616 U CN201937616 U CN 201937616U
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Abstract
The utility model discloses a data acquisition system facilitating realization of RS485 bus networking, comprising a power supply for supplying power and a processor, wherein the input end of the processor is connected with a signal time-sharing multiplexing circuit, and the input end of the signal time-sharing multiplexing circuit is connected with a signal acquisition and conditioning circuit which comprises an analog value acquisition and conditioning circuit, a digital value acquisition and conditioning circuit and a switching value acquisition and conditioning circuit; the input end of the analog value acquisition and conditioning circuit is connected with a sensor group I, the input end of the digital value acquisition and conditioning circuit is connected with a sensor group II, and the input end of the switching value acquisition and conditioning circuit is connected with a sensor group III; and the output end of the processor is connected with a RS485 bus receiver, and the output end of the RS485 bus receiver is connected with a RS485 bus isolation transformer for connecting with a RS485 bus. The data acquisition system has reasonable design, is simple and convenient for use and operation, is convenient for realizing the RS485 bus networking, and can reduce the arranging number of field acquisition equipment, reduce the difficulty of field operation and save the cost of labor and materials.
Description
Technical field
The utility model relates to a kind of data acquisition system, especially relates to a kind of data acquisition system of being convenient to realize the networking of RS485 bus.
Background technology
Along with the attention of present people, to the increasing of environmental index monitoring dynamics to environment; The on-the-spot increase that needs all kinds amount number of collection, transducer will be a huge quantity, how the data of transducer are gathered accurately and be a very important link, the transducer of disposing in the scene often disperses very much, laying the interval of sensing station does not wait from tens meters to hundreds of rice, the form simulation amount and the digital quantity of these transducer outputs do not wait, be subjected to the requirement of industrial site particular surroundings, the distance of the collection range sensor position of many signals all has clear and definite required distance, and for measuring accurately, a collecting device often can not satisfy on-the-spot requirement, so may dispose two or more collecting device at the scene, so not only cause the increase of cost, most importantly the difference of each equipment acquisition precision causes the error of image data after disposing a large amount of collecting devices, like this with regard to very difficult each corresponding environmental index that monitors accurately.The position of the transducer arrangements that has in addition is relatively harsh, as the transducer that is deployed on the chimney will safeguard and corresponding setting is constructed at the scene and is confronted with numerous difficulties that reduction site operation personnel's work difficulty is also very actual to it.
In recent years, along with the fast development of industrial control technology, fieldbus is because its reliability height, advantage obtains more and more widely application such as cost is low, failure rate is low.The RS485 bus adopts balance to send and differential received, therefore has the ability that suppresses common mode disturbances.Transmission signals adds that the transmitting-receiving of RS485 bus has high sensitivity, can detect the voltage that is low to moderate 200mV, so can be restored beyond km.Requiring communication distance is tens meters during to last km, extensively adopts the RS485 serial bus standard.The RS485 bus adopts half-duplex operation, whenever can only be in transmit status by a bit, and therefore, transtation mission circuit must be controlled by enable signal.Very convenient when the RS485 bus is used for multi-point interconnection, can save many holding wires.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art, a kind of data acquisition system of being convenient to realize the networking of RS485 bus is provided, it is reasonable in design, use easy and simple to handle, be convenient to realize the networking of RS485 bus, can reduce the deployment amount of collection in worksite equipment, reduce the difficulty of execute-in-place, cost uses manpower and material resources sparingly.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of data acquisition system of being convenient to realize the networking of RS485 bus, it is characterized in that: comprise power supply and processor to system's power supply, the input termination signal time-sharing multiplex circuit of described processor, the input termination signals collecting and the modulate circuit of described signal time-sharing multiplex circuit, described signals collecting and modulate circuit are by analog acquisition and modulate circuit, digital data acquisition and modulate circuit and switch acquisition and modulate circuit constitute, the input termination output signal of described analog acquisition and modulate circuit is the sensor groups one of analog quantity, the input termination output signal of described digital data acquisition and modulate circuit is the sensor groups two of digital quantity, the input termination output signal of described switch acquisition and modulate circuit is the sensor groups three of switching value, described signal time-sharing multiplex circuit by respectively with analog acquisition and modulate circuit, the signal time-sharing multiplex circuit one that digital data acquisition and modulate circuit and switch acquisition and modulate circuit join, signal time-sharing multiplex circuit two and signal time-sharing multiplex circuit three constitute, the output termination RS485 bus transceiver of described processor, the output termination of described RS485 bus transceiver is used for the RS485 bus isolating transformer that joins with the RS485 bus, described power supply respectively with signals collecting and modulate circuit, signal time-sharing multiplex circuit, processor, RS485 bus transceiver and RS485 bus isolating transformer join.
Above-mentioned a kind of data acquisition system of being convenient to realize the networking of RS485 bus is characterized in that: described power supply is general dry battery, Li-Ion rechargeable battery, nickel-hydrogen chargeable cell or solar cell.
Above-mentioned a kind of data acquisition system of being convenient to realize the networking of RS485 bus is characterized in that: described processor is 51 single-chip microcomputers, MSP430 single-chip microcomputer or AVR single-chip microcomputer.
Above-mentioned a kind of data acquisition system of being convenient to realize the networking of RS485 bus is characterized in that: described RS485 bus transceiver is chip SN751177N.
The utility model compared with prior art has the following advantages:
1, the utility model is designed to analog acquisition and modulate circuit, digital data acquisition and modulate circuit and switch acquisition and modulate circuit three classes with signals collecting and modulate circuit, be convenient to connect the transducer that output in the scene of being laid in is respectively analog quantity, digital quantity and switching value, be convenient to the expansion of system.
The quantity of field apparatus when 2, design of the present utility model can reduce the RS485 networking has reduced site operation personnel's work difficulty, and can improve the acquisition precision of system.
3, the utility model can improve in the industrial site owing to disturb the problem of caused data transmission distance, and high-transmission distance can be 1200 meters.
4, the utility model can solve the acquisition time of an equipment of all amounts in the zone, and a collecting device can connect 128 these systems by the RS485 bus at most, realizes that cost is low, and result of use is good, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model.
Description of reference numerals:
The 1-power supply; The 2-processor; 3-signal time-sharing multiplex circuit;
3-1-signal time-sharing multiplex electricity 3-2-signal time-sharing multiplex electricity 3-3-signal time-sharing multiplex
Road one; Road two; Road three;
4-signals collecting and nurse one's health electric 4-1-analog acquisition and transfer the 4-2-digital data acquisition and accent
The road; The reason circuit; The reason circuit;
4-3-switch acquisition and accent 5-1-sensor groups one; 5-2-sensor groups two;
The reason circuit;
5-3-sensor groups three; The 6-RS485 bus transceiver; The 7-RS485 bus is isolated transformation
Device;
The 8-RS485 bus.
Embodiment
As shown in Figure 1, the utility model comprises power supply 1 and the processor 2 to system's power supply, the input termination signal time-sharing multiplex circuit 3 of described processor 2, the input termination signals collecting of described signal time-sharing multiplex circuit 3 and modulate circuit 4, described signals collecting and modulate circuit 4 are by analog acquisition and modulate circuit 4-1, digital data acquisition and modulate circuit 4-2 and switch acquisition and modulate circuit 4-3 constitute, the input termination output signal of described analog acquisition and modulate circuit 4-1 is sensor groups one 5-1 of analog quantity, the input termination output signal of described digital data acquisition and modulate circuit 4-2 is sensor groups two 5-2 of digital quantity, the input termination output signal of described switch acquisition and modulate circuit 4-3 is sensor groups three 5-3 of switching value, described signal time-sharing multiplex circuit 3 by respectively with analog acquisition and modulate circuit 4-1, signal time-sharing multiplex circuit one 3-1 that digital data acquisition and modulate circuit 4-2 and switch acquisition and modulate circuit 4-3 join, signal time-sharing multiplex circuit two 3-2 and signal time-sharing multiplex circuit three 3-3 constitute, the output termination RS485 bus transceiver 6 of described processor 2, the output termination of described RS485 bus transceiver 6 is used for the RS485 bus isolating transformer 7 that joins with RS485 bus 8, described power supply 1 respectively with signals collecting and modulate circuit 4, signal time-sharing multiplex circuit 3, processor 2, RS485 bus transceiver 6 and RS485 bus isolating transformer 7 join.
As shown in Figure 1, in the present embodiment, described power supply 1 is general dry battery, Li-Ion rechargeable battery, nickel-hydrogen chargeable cell or solar cell.Described processor 2 is 51 single-chip microcomputers, MSP430 single-chip microcomputer or AVR single-chip microcomputer.Described RS485 bus transceiver 6 is chip SN751177N.
Because the utility model is designed to analog acquisition and modulate circuit 4-1, digital data acquisition and modulate circuit 4-2 and switch acquisition and modulate circuit 4-3 three classes with signals collecting and modulate circuit 4, be convenient to connect the transducer that output in the scene of being laid in is respectively analog quantity, digital quantity and switching value, so, adopt the utility model to carry out the networking of RS485 bus, only need a total collecting device, RS485 bus isolating transformer in the system 7 is connected to total collecting device by RS485 bus 8, just can realizes the collection of various sensor signals in the scene.Reduce the difficulty of execute-in-place, cost uses manpower and material resources sparingly.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection range of technical solutions of the utility model according to the utility model technical spirit.
Claims (4)
1. data acquisition system of being convenient to realize the networking of RS485 bus, it is characterized in that: comprise power supply (1) and processor (2) to system's power supply, the input termination signal time-sharing multiplex circuit (3) of described processor (2), the input termination signals collecting of described signal time-sharing multiplex circuit (3) and modulate circuit (4), described signals collecting and modulate circuit (4) are by analog acquisition and modulate circuit (4-1), digital data acquisition and modulate circuit (4-2) and switch acquisition and modulate circuit (4-3) constitute, the input termination output signal of described analog acquisition and modulate circuit (4-1) is the sensor groups one (5-1) of analog quantity, the input termination output signal of described digital data acquisition and modulate circuit (4-2) is the sensor groups two (5-2) of digital quantity, the input termination output signal of described switch acquisition and modulate circuit (4-3) is the sensor groups three (5-3) of switching value, described signal time-sharing multiplex circuit (3) by respectively with analog acquisition and modulate circuit (4-1), the signal time-sharing multiplex circuit one (3-1) that digital data acquisition and modulate circuit (4-2) and switch acquisition and modulate circuit (4-3) join, signal time-sharing multiplex circuit two (3-2) and signal time-sharing multiplex circuit three (3-3) constitute, the output termination RS485 bus transceiver (6) of described processor (2), the output termination of described RS485 bus transceiver (6) is used for the RS485 bus isolating transformer (7) that joins with RS485 bus (8), described power supply (1) respectively with signals collecting and modulate circuit (4), signal time-sharing multiplex circuit (3), processor (2), RS485 bus transceiver (6) and RS485 bus isolating transformer (7) join.
2. according to the described a kind of data acquisition system of being convenient to realize the networking of RS485 bus of claim 1, it is characterized in that: described power supply (1) is general dry battery, Li-Ion rechargeable battery, nickel-hydrogen chargeable cell or solar cell.
3. according to the described a kind of data acquisition system of being convenient to realize the networking of RS485 bus of claim 1, it is characterized in that: described processor (2) is 51 single-chip microcomputers, MSP430 single-chip microcomputer or AVR single-chip microcomputer.
4. according to the described a kind of data acquisition system of being convenient to realize the networking of RS485 bus of claim 1, it is characterized in that: described RS485 bus transceiver (6) is chip SN751177N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206691725U CN201937616U (en) | 2010-12-19 | 2010-12-19 | Data acquisition system facilitating realization of RS485 bus networking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206691725U CN201937616U (en) | 2010-12-19 | 2010-12-19 | Data acquisition system facilitating realization of RS485 bus networking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201937616U true CN201937616U (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206691725U Expired - Fee Related CN201937616U (en) | 2010-12-19 | 2010-12-19 | Data acquisition system facilitating realization of RS485 bus networking |
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| CN (1) | CN201937616U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831683A (en) * | 2017-12-15 | 2018-03-23 | 山东大学 | A kind of control electric system and its method of work based on RS485 networkings |
| CN109916537A (en) * | 2019-04-01 | 2019-06-21 | 中北大学 | A kind of pressure data acquisition system based on picogram bus transfer agreement |
-
2010
- 2010-12-19 CN CN2010206691725U patent/CN201937616U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831683A (en) * | 2017-12-15 | 2018-03-23 | 山东大学 | A kind of control electric system and its method of work based on RS485 networkings |
| CN109916537A (en) * | 2019-04-01 | 2019-06-21 | 中北大学 | A kind of pressure data acquisition system based on picogram bus transfer agreement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20111219 |