CN202815450U - A data acquisition controller - Google Patents
A data acquisition controller Download PDFInfo
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- CN202815450U CN202815450U CN 201220359906 CN201220359906U CN202815450U CN 202815450 U CN202815450 U CN 202815450U CN 201220359906 CN201220359906 CN 201220359906 CN 201220359906 U CN201220359906 U CN 201220359906U CN 202815450 U CN202815450 U CN 202815450U
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- circuit
- data acquisition
- switching circuit
- acquisition controller
- wireless module
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Abstract
The utility model relates to an electric apparatus, specifically to a data acquisition controller comprising a power source and a CPU which are connected with circuits. The data acquisition controller is characterized in that the CPU is connected with a wireless module and an RS485 switching circuit which are connected in parallel and connected with field devices through connecting terminals; the CPU is connected with a level switching circuit; the level switching circuit is communicated with the CPU through a signal receiving circuit and is communicated with a channel switching circuit; and the channel switching circuit is connected with the wireless module and the RS485 switching circuit which are connected in parallel. The data acquisition controller is simple in structure, stable in operation, high in anti-jamming capability, and easy to use and promote and can be widely applied to the fields of civil and industrial data acquisition.
Description
(1) technical field
The utility model relates to a kind of electronic equipment, particularly a kind of data acquisition controller.
(2) background technology
MBUS, namely meter bus (Meter-Bus, European standard EN1434-3) is a kind of master-slave mode half-duplex transmission bus of consumption measuring instrument data transmission scheme that is specially.The MBUS data collector is used for the data communication with the instrument of using the MBUS bus.
The RS-485 interface is the combination of adopting balance driver and differential receiver, and anti-common mode interference ability strengthens, and namely noise immunity is good.The RS485 data collector is used for the data communication with the instrument of using the RS485 bus.
MBUS data collector and RS485 data collector all are the collector of unified bus, and all can only gather single table counts, all run into the problem that extendability is poor, application cost is high in using at the scene, and because the problem that bus short circuit fault effects whole system can't work.
(3) summary of the invention
The utility model provides a kind of data acquisition controller simple in structure, easy to use in order to remedy the deficiencies in the prior art.
The utility model is achieved by the following technical solution:
A kind of data acquisition controller, the power supply and the CPU processor that comprise connecting circuit, it is characterized in that: described CPU processor is connected in parallel to wireless module and RS485 change-over circuit, wireless module and RS485 change-over circuit all are connected with field apparatus by connection terminal, the CPU processor connects level shifting circuit, level shifting circuit is communicated with the CPU processor by signal receiving circuit, level shifting circuit and channel switching circuit are interconnected, and channel switching circuit is connected with the RS485 change-over circuit with the wireless module of parallel connection.
The utility model is by setting up reliable communication channel, process and exchange the data message of CPU processor and table unit, the CPU processor reads the secretary by wireless module and RS485 change-over circuit, both can read the data of preservation, also can make the various energy consumption datas of controller Real-time Collection.
More excellent scheme of the present utility model is:
Be connected with clock circuit and memory circuit on the described CPU processor, can be configured to according to demand timing automatic image data every day, the data after the image data are kept in the controller, read at any time for the CPU processor.
Between described level shifting circuit and the channel switching circuit short-circuit protection circuit is installed, when automatically detecting the passage that is short-circuited, the passageway shuts off of short circuit, makes it not disturb the normal operation of other passages.
The utility model is simple in structure, working stability, and antijamming capability is strong, and is easy to use, is easy to promote, and all has widely purposes in the civilian and industrial circle of data acquisition.
(4) description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is structural representation of the present utility model.
Among the figure, 1 power supply, 2CPU processor, 3 wireless modules, 4RS485 change-over circuit, 5 level shifting circuits, 6 channel switching circuits, 7 clock circuits, 8 memory circuits, 9 short-circuit protection circuits, 10 signal receiving circuits.
(5) embodiment
Fig. 1 is a kind of specific embodiment of the present utility model.This embodiment comprises power supply 1 and the CPU processor 2 of connecting circuit, described CPU processor 2 is connected in parallel to wireless module 3 and RS485 change-over circuit 4, wireless module 3 is connected with the RS485 change-over circuit and all is connected with field apparatus by connection terminal, CPU processor 2 connects level shifting circuit 5, level shifting circuit 5 is communicated with CPU processor 2 by signal receiving circuit 10, level shifting circuit 5 is interconnected with channel switching circuit 6, and channel switching circuit 6 is connected with the RS485 change-over circuit with the wireless module 3 of parallel connection and is connected; Be connected with clock circuit 7 and memory circuit 8 on the described CPU processor 2; Between described level shifting circuit 5 and the channel switching circuit 6 short-circuit protection circuit 9 is installed.
The utility model has MBUS and RS485 bus communication function simultaneously; Can gather simultaneously the various energy consumption datas such as ammeter, water meter, gas meter, flow meter, calorimeter, meet better rig-site utilization; Can automatically detect the passage that is short-circuited, the passageway shuts off of short circuit, make its normal operation of not disturbing other passages, make system's operation more stable.
The data acquisition controller Embedded Software Design is the passive formula of replying, carry out again corresponding operation after namely receiving the instruction of administrative center, mainly count 4 major parts such as acquisition process program, short-circuit detecting program and form by main circulating program, Communications service program, table:
1. master routine: comprise that initialize routine, systematic parameter obtain program, wait for interrupt routine, wait for the timing meter reading program.
(1) initialize routine: the CPU special function register is carried out initialization, so that timer, serial ports and each passage relay status, wireless module, RS485 change-over circuit, level shifting circuit, channel switching circuit, clock circuit, memory circuit, short-circuit protection circuit, signal receiving circuit to be set.
(2) systematic parameter is obtained program: comprise from memory circuit obtaining the machine address, timing acquisition time, table address table, last time image data, obtain system time from real-time clock.
(3) wait for to interrupt: detect receive data end mark from wireless module and RS485 change-over circuit, if the data of receiving then call the Communications service program, otherwise all kinds of interruptions of circular wait.
(4) wait for the timing acquiring program: detect the sign that timing acquisition time arrives, be timed to and then start image data.
2. Communications service program: comprise data receiver program, Address Recognition program, communications protocol analysis program.
(1) data receiver program: from wireless module and RS485 change-over circuit receive data.
(2) Address Recognition program: be when wireless module and RS485 change-over circuit receive a complete frame, compare called address and the machine address, if the same again extract useful data juxtaposition communication effective marker, all kinds of interruptions of circular wait are then abandoned and got back to difference.
(3) communications protocol interpretive routine: communication symbol is effectively then analyzed the instruction that communication comprises, and the operation of being correlated with according to instruction, as starting image data, uploading data file etc.
3. table counts the acquisition process program: according to the table address table of storer in the data acquisition controller, open corresponding RS485 change-over circuit, level shifting circuit, signal receiving circuit and channel switching circuit, the data that each and a table meter communication acquisition table meter return are also uploaded, until counting to gather, this channel table finishes the data of then storing this collection, and carry out the data acquisition of next passage, until counting to gather, finish by all tables.
4. short-circuit detecting program: start short-circuit protection circuit work, real-time sense channel bus state when the sense channel bus is short-circuited, automatically the passageway shuts off of this short circuit, makes its normal operation of not disturbing other passages automatically, makes system's operation more stable.
Claims (3)
1. data acquisition controller, the power supply (1) and the CPU processor (2) that comprise connecting circuit, it is characterized in that: described CPU processor (2) is connected in parallel to wireless module (3) and RS485 change-over circuit (4), wireless module (3) is connected 4 with the RS485 change-over circuit) all be connected with field apparatus by connection terminal, CPU processor (2) connects level shifting circuit (5), level shifting circuit (5) is communicated with CPU processor (2) by signal receiving circuit (10), level shifting circuit (5) is interconnected with channel switching circuit (6), and channel switching circuit (6) is connected 4 with wireless module (3) in parallel with the RS485 change-over circuit) be connected.
2. data acquisition controller according to claim 1 is characterized in that: be connected with clock circuit (7) and memory circuit (8) on the described CPU processor (2).
3. data acquisition controller according to claim 1 is characterised in that: between described level shifting circuit (5) and the channel switching circuit (6) short-circuit protection circuit (9) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359906 CN202815450U (en) | 2012-07-24 | 2012-07-24 | A data acquisition controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359906 CN202815450U (en) | 2012-07-24 | 2012-07-24 | A data acquisition controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202815450U true CN202815450U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220359906 Expired - Fee Related CN202815450U (en) | 2012-07-24 | 2012-07-24 | A data acquisition controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202815450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341411A (en) * | 2018-09-20 | 2019-02-15 | 中北大学 | A kind of trigger circuit |
-
2012
- 2012-07-24 CN CN 201220359906 patent/CN202815450U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341411A (en) * | 2018-09-20 | 2019-02-15 | 中北大学 | A kind of trigger circuit |
| CN109341411B (en) * | 2018-09-20 | 2020-12-11 | 中北大学 | Trigger circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20160724 |