CN204992516U - Computer protection device and power equipment - Google Patents
Computer protection device and power equipment Download PDFInfo
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- CN204992516U CN204992516U CN201520759326.2U CN201520759326U CN204992516U CN 204992516 U CN204992516 U CN 204992516U CN 201520759326 U CN201520759326 U CN 201520759326U CN 204992516 U CN204992516 U CN 204992516U
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Abstract
The utility model discloses a computer protection device and power equipment, this computer protection device include: central processing unit, man -machine interface board, figure dot matrix liquid crystal, combined current and potential transformer, switching value input and output modules, power and operation circuit, circuit breaker, keyboard and pilot lamp, wherein: the man -machine interface board is provided with the complex programmable logic device chip, the man -machine interface board with central processing unit carries out communication connection through the I2C bus, is used for control the demonstration of figure dot matrix liquid crystal the signal acquisition of keyboard with the operation of pilot lamp, switching value input and output modules combined current and potential transformer power and operation circuit and central processing unit connects, operation circuit is used for control the branch of circuit breaker, combined floodgate. Implement the utility model discloses can improve the signal interface's of CPU and man -machine interface board driving force, and transmission distance is far away, the interference killing feature is strong.
Description
Technical field
The utility model relates to electric power observation and control technical field, particularly a kind of microcomputer protecting device and power equipment.
Background technology
At present, microcomputer protecting device is exported the parts such as auxiliary relay, high-reliability switch power module formed by the microprocessor of high integration, high-precision current voltage transformer, high insulation resistance.Microcomputer protecting device is mainly used in the place such as power plant, transformer station, power distribution station of 10KV and above, realizes the main electric power equipment in these places as the protection of the equipment such as transformer, capacitor, outgoing and observing and controlling.
The people of microcomputer protecting device connects interface plate and is mainly used for checking the operation information of device, the protection definite value of setting and browsing apparatus and parameter etc. of dispatching from the factory.Wherein, operation information comprises: measuring amount, intake, the amount of outputing, SOE (SequenceOfEvent, event sequence recording system), accident record.But in data transmission procedure, CPU (CentralProcessingUnit, the central processing unit) communication between plate and man-machine interface plate of microcomputer protecting device is easily disturbed, EMC (electromagnetic compatibility) test in addition
need a lot of addition thereto, andbe difficult to pass through.In addition, some microcomputer protecting devices, in order to reduce this degree be disturbed, need to arrange cpu chip in man-machine interface plate and corresponding software carries out work, cause the rising of hardware cost and software development cost thus.
Utility model content
In view of this, the object of the utility model embodiment is to propose a kind of microcomputer protecting device and power equipment, can improve the driving force of the signaling interface of CPU and man-machine interface plate, and long transmission distance, antijamming capability is strong.
Further, this microcomputer protecting device comprises: central processing unit, man-machine interface plate, graphic dot matrix liquid crystal, current-voltage transformer, On-off signal output module, power supply and operation circuit, circuit breaker, keyboard and indicator light; Wherein: described man-machine interface plate is provided with CPLD chip, described man-machine interface plate and described central processing unit are communicated to connect by I2C bus, for controlling the operation of the display of described graphic dot matrix liquid crystal, the signals collecting of described keyboard and described indicator light; Described On-off signal output module, described current-voltage transformer, described power supply and operation circuit are connected with described central processing unit, described operation circuit for control described circuit breaker point, close a floodgate.
Alternatively, in certain embodiments, above-mentioned microcomputer protecting device also can comprise photoisolator, and described photoisolator is connected with described On-off signal output module, carries out Phototube Coupling process for switch amount input, output signal machine.
Alternatively, in certain embodiments, above-mentioned microcomputer protecting device also can comprise serial UART232 interface Liquid Crystal Module, and described serial UART232 interface Liquid Crystal Module carries out driving with described central processing unit by serial ports and is connected.
Alternatively, in certain embodiments, described serial UART232 interface Liquid Crystal Module is with Hanzi font library and/or process chip.
Alternatively, in certain embodiments, described graphic dot matrix liquid crystal is connected with CPLD chip by eight parallel-by-bit buses, reading writing signal line, chip select line, address wire.
Further, this power equipment is configured with for protecting described power equipment and the above-mentioned microcomputer protecting device described in any one of observing and controlling.
Alternatively, in certain embodiments, described power equipment comprises transformer, capacitor, outgoing.
Relative to prior art, each embodiment of the utility model has the following advantages:
After adopting the technical scheme of the utility model embodiment, CPU by communicating between I2C bus with man-machine interface plate, and controls man-machine interface, and the interface of CPU and man-machine interface signal has stronger driving force, long transmission distance, and antijamming capability is strong.
More characteristics and advantages of the present utility model are explained in embodiment afterwards.
Accompanying drawing explanation
The accompanying drawing of a part for formation the utility model embodiment is used to provide the further understanding to the utility model embodiment, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
The structural representation of the microcomputer protecting device that Fig. 1 provides for the utility model embodiment;
The connection status schematic diagram of the CPU that Fig. 2 provides for the utility model embodiment and man-machine interface plate;
The interface diagram of the I2C bus that Fig. 3 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the utility model embodiment, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
It should be noted that, when not conflicting, the feature in the utility model embodiment and embodiment can combine mutually.
Below in conjunction with accompanying drawing, each embodiment of the present utility model is described further:
With reference to Fig. 1, the structured flowchart of its microcomputer protecting device provided for the present embodiment.As shown in Figure 1, this microcomputer protecting device comprises central processing unit (CPU), man-machine interface plate, graphic dot matrix liquid crystal, current-voltage transformer, On-off signal output module, power supply and operation circuit, circuit breaker, keyboard and indicator light.
In the microcomputer protecting device of the present embodiment; man-machine interface plate is provided with CPLD (CPLD; ComplexProgrammableLogicDevice) chip; man-machine interface plate and central processing unit are communicated to connect by I2C (Inter-IntegratedCircuit) bus, and CPU and man-machine interface realize controlling the operation of the display of graphic dot matrix liquid crystal, the signals collecting of keyboard and indicator light by I2C bus.Wherein, central processing unit is provided with I2C driver., be embedded with I2C communication protocol in CPLD, realize real time parsing that I2C reads and writes data and realize operating the reading and writing of control object by parallel interface.Human-computer interface module finishing man-machine interaction function, realizes functions such as arranging device parameter, operation information is browsed.On-off signal output module and central processing unit communicate to connect, and realize the collection of On-off signal and the control of output switch parameter.Current-voltage transformer is connected with central processing unit, for changing alternating voltage and electric current, the mapping function of alternating voltage and electric current is such as realized by current-voltage transformer, the big current of input and high-voltage variable are changed into the small voltage signal within the scope of 5V, be then transformed into digital signal for CPU process through AD converter.Power module and operation circuit are connected with central processing unit, and power module can be the power supply that microcomputer protecting device provides 5V, 24V, operation circuit for control circuit breaker point, close a floodgate.
In above-described embodiment, CPU by communicating between I2C bus with man-machine interface plate, and controls man-machine interface, and the interface of CPU and man-machine interface signal has stronger driving force, long transmission distance, and antijamming capability is strong.CPU sends instruction by I2C driver and controls man-machine interface plate, CPLD chip on man-machine interface plate is responsible for supervisory keyboard, indicator light as LED (light-emitting diode) and graphic dot matrix liquid crystal, and communicates with CPU by realizing I2C bus protocol.This realizes with existing microcomputer protecting device CPU compared with the mode that communicates mainly through the mode that the parallel bus of CPU is expanded with man-machine panel; above-described embodiment realizes the communication interface of CPU and man-machine interface plate by I2C bus; decrease the number of holding wire; improve antijamming capability; and parallel data transmission distance; be not subject to outside electromagnetic interference, can expand the man-machine panel of eurypalynous liquid crystal flexibly, this realizes by the program in amendment CPLD chip.In addition, do not need CPU and corresponding software at the man-machine interface plate of above-described embodiment, therefore saved hardware cost and software development cost.
As the optional execution mode of one, above-mentioned microcomputer protecting device also can comprise photoisolator, and photoisolator is connected with On-off signal output module, carries out Phototube Coupling process for switch amount input, output signal machine.In the present embodiment, On-off signal, output signal through Phototube Coupling process, its antijamming capability can be improved.
It should be noted that, graphic dot matrix liquid crystal is connected with CPLD chip by eight parallel-by-bit buses, reading writing signal line, chip select line, address wire.The digital integrated circuit of CPLD be a kind of user according to needing separately constitutive logic function voluntarily, basic design method is by Integrated Development software platform, by the method such as schematic diagram, hardware description language, generate corresponding file destination, by download cable, code is sent in objective chip, realizes the digital system of design.
Be described further below in conjunction with the workflow of an instantiation to above-mentioned microcomputer protecting device:
1, keyboard operation
When there being button to press, the busy holding wire of keyboard will become low level, and this signal can also can as I/O signal as interrupt signal.When as interrupt signal, CPU in this interrupt processing operation, can be driven by I2C and reads key assignments to determine that key is pressed, and perform operation corresponding to this key.
2, LED operation
When needs are lighted or extinguish some LED, CPU can call I2C write operation, after receiving the message of this I2C write operation, according to the address information of message and can write data, determine to light which LED etc. for the corresponding positions set 1 or 0, CPLD of LED control byte.
3, graphic dot matrix liquid crystal operation
Graphic dot matrix liquid crystal operation is the part that this application is the most complicated, and graphic dot matrix liquid crystal is connected with CPLD by 8 parallel-by-bit buses, reading writing signal line, chip select line, address wire.
CPU realizes read-write operation to graphic dot matrix liquid crystal by I2C bus, and process is that first the message that CPLD receives I2C judges to read or write operation.
If write operation just by subsequent packet write data often receive a byte just by parallel port operation write a byte to liquid crystal, write address is in this frame message.
If read operation, then resolve all addresses in this frame message, then read the data of graphic dot matrix liquid crystal response address by parallel port, and be filled up to the message frame of I2C, read by CPU.
It should be noted that, in above-described embodiment, keyboard busy signal is a miscellaneous function, so that CPU responds keyboard fast, CPU also directly can read key assignments, to have judged whether button operation by I2C bus.
It is pointed out that CPLD reset operation signal reset, this programme also has a reset signal by CPU to CPLD.Object is that CPU can direct reduction CPLD logic if desired, to make both synchronous.
Here, with reference to shown in Fig. 2 and Fig. 3, I2C bus protocol data transmission procedure is once introduced: I2C bus comprises two bidirectional linked list lines, a data wire SDA, a clock lines SCL.It is hold greatly transmission (a byte high position first passes) that SDA transmits data, transmits 8bit, i.e. a byte at every turn.Support many master controls (multimastering), point can only have a master control any time.In bus, each equipment has the addr of oneself, totally 7 bit, broadcast address full 0.
Wherein, I2C bus protocol data transmission procedure comprises:
A, I2C start and end signal
When commencing signal: SCL is high level, SDA, is started to transmit data to low transition by high level.
When end signal: SCL is high level, SDA, is terminated to transmit data to high level saltus step by low level.
B, I2C position is transmitted
When transfer of data: SCL is high level, SDA line must keep stable, SDA upper transmission bit data;
Data change: when SCL is low level, SDA line could change level
C, I2C answer signal
Master control is waited for from device A CK after often sending 8bit data.
Namely at the 9th clock, if beam back ACK from equipment, SDA can be dragged down.
If do not have ACK, SDA can be set high, and this can cause master control that RESTART or STOP flow process occurs
D, I2C write flow process
The normal process writing register is:
1.Master initiates START
2.Master sends I2Caddr (7bit) and w and operates 0 (1bit), waits for ACK
3.Slave sends ACK
4.Master sends regaddr (8bit), waits for ACK
5.Slave sends ACK
6.Master sends data (8bit), namely will write the data in register, waits for ACK
7.Slave sends ACK
8. the 6th step and the 7th step can repeatedly, i.e. the multiple register of sequential write
9.Master initiates STOP
E, I2C read flow process
The normal process of read register is:
1.Master sends I2Caddr (7bit) and w and operates 1 (1bit), waits for ACK
2.Slave sends ACK
3.Master sends regaddr (8bit), waits for ACK
4.Slave sends ACK
5.Master initiates START
6.Master sends I2Caddr (7bit) and r and operates 1 (1bit), waits for ACK
7.Slave sends ACK
8.Slave sends data (8bit), the value namely in register
9.Master sends ACK
10. the 8th step and the 9th step can repeatedly, and namely order reads multiple register
F, basic communication flow process
1, main equipment sends commencing signal (Start).
2, main equipment send 1 byte from device address information, wherein lowest order is Read-write Catrol code (0 for writing, and 1 for reading), and high 7 is from machine address code.
3, handshaking signal is sent from equipment.
4, main equipment starts to carry out read-write operation to from equipment.If read operation, then often read 1 byte, main equipment can send an answer signal (Ack) to from equipment, if write operation, then often writes 1 byte, can send an answer signal (Ack) to main equipment from equipment.
5, main equipment sends end signal (Stop).
As the optional execution mode of one, the microcomputer protecting device in above-described embodiment also can comprise serial UART232 interface Liquid Crystal Module, and serial UART232 interface Liquid Crystal Module carries out driving with central processing unit by serial ports and is connected.Serial UART232 interface Liquid Crystal Module is directly driven by serial ports by CPU.
Optionally, in above-described embodiment, serial UART232 interface Liquid Crystal Module is with Hanzi font library and/or process chip.
As can be seen from the above; in the microcomputer protecting device of these the various embodiments described above, CPU and man-machine interface plate adopt I2C bus interface, and on man-machine interface plate, adopt the control logic of CPLD programming realization I2C bus protocol and keyboard, LED and graphic dot matrix liquid crystal.Compared with common parallel bus control method, holding wire number obviously reduces, and simultaneously because I2C Signal transmissions adopts special driving chip long distance of signal transmission, antijamming capability strong, improves the reliability of Signal transmissions.
In addition, adopt CPLD programming technique that number of chips is reduced, the integrated level of hardware is high, can expand polytype liquid-crystal controller flexibly simultaneously.
In addition, of the present utility modelly embodiment still provides a kind of power equipment, this power equipment is provided with any one microcomputer protecting device above-mentioned.
Wherein, the power equipment of described electric power system comprises transformer, capacitor, outgoing, and described microcomputer protecting device is used for protecting and observing and controlling described power equipment.
Because any one microcomputer protecting device above-mentioned has above-mentioned technique effect, therefore, the power equipment being provided with this microcomputer protecting device also should possess corresponding technique effect, and its specific implementation process is similar to the above embodiments, does not hereby repeat.
The foregoing is only embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (7)
1. a microcomputer protecting device, is characterized in that, comprises central processing unit, man-machine interface plate, graphic dot matrix liquid crystal, current-voltage transformer, On-off signal output module, power supply and operation circuit, circuit breaker, keyboard and indicator light; Wherein:
Described man-machine interface plate is provided with CPLD chip, described man-machine interface plate and described central processing unit are communicated to connect by I2C bus, for controlling the operation of the display of described graphic dot matrix liquid crystal, the signals collecting of described keyboard and described indicator light;
Described On-off signal output module, described current-voltage transformer, described power supply and operation circuit are connected with described central processing unit, described operation circuit for control described circuit breaker point, close a floodgate.
2. microcomputer protecting device according to claim 1, is characterized in that, also comprises photoisolator, and described photoisolator is connected with described On-off signal output module, carries out Phototube Coupling process for switch amount input, output signal machine.
3. microcomputer protecting device according to claim 1, is characterized in that, also comprises serial UART232 interface Liquid Crystal Module, and described serial UART232 interface Liquid Crystal Module carries out driving with described central processing unit by serial ports and is connected.
4. microcomputer protecting device according to claim 3, is characterized in that, described serial UART232 interface Liquid Crystal Module is with Hanzi font library and/or process chip.
5. the microcomputer protecting device according to any one of Claims 1-4, is characterized in that, described graphic dot matrix liquid crystal is connected with CPLD chip by eight parallel-by-bit buses, reading writing signal line, chip select line, address wire.
6. a power equipment, is characterized in that, be configured with for described power equipment is protected and observing and controlling any one of claim 1 to 5 described in microcomputer protecting device.
7. power equipment according to claim 6, is characterized in that, described power equipment comprises transformer, capacitor, outgoing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520759326.2U CN204992516U (en) | 2015-09-28 | 2015-09-28 | Computer protection device and power equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520759326.2U CN204992516U (en) | 2015-09-28 | 2015-09-28 | Computer protection device and power equipment |
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| CN204992516U true CN204992516U (en) | 2016-01-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106484023A (en) * | 2016-11-14 | 2017-03-08 | 成都九五测控科技有限公司 | A kind of lightning protection microcomputer protecting controller |
| CN109669872A (en) * | 2018-12-24 | 2019-04-23 | 郑州云海信息技术有限公司 | A kind of verification method and device |
-
2015
- 2015-09-28 CN CN201520759326.2U patent/CN204992516U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106484023A (en) * | 2016-11-14 | 2017-03-08 | 成都九五测控科技有限公司 | A kind of lightning protection microcomputer protecting controller |
| CN109669872A (en) * | 2018-12-24 | 2019-04-23 | 郑州云海信息技术有限公司 | A kind of verification method and device |
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