CN202091625U - Valve position information conversion module for electric actuator - Google Patents
Valve position information conversion module for electric actuator Download PDFInfo
- Publication number
- CN202091625U CN202091625U CN2011201787872U CN201120178787U CN202091625U CN 202091625 U CN202091625 U CN 202091625U CN 2011201787872 U CN2011201787872 U CN 2011201787872U CN 201120178787 U CN201120178787 U CN 201120178787U CN 202091625 U CN202091625 U CN 202091625U
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- circuit
- microprocessor
- position information
- electric actuator
- valve position
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Abstract
The utility model relates to a valve position information conversion module for an electric actuator, which comprises a microprocessor, an RS422 circuit, a digital-to-analog conversion circuit, an RS 485 circuit and a power circuit. The power circuit converts an alternating-current power source into a direct-current power source and is connected with all other circuits, an input end of the RS422 circuit is connected with position data outputted by an absolute value encoder, an output end of the RS422 circuit is connected with an input end of the microprocessor, and an output end of the microprocessor is respectively connected with the digital-to-analog conversion circuit and the RS485 circuit and outputs analog signals and RS485 data. The valve position information conversion module is reasonable in design and capable of processing and converting RS442 format digital signals of the absolute value encoder by the aid of the microprocessor, functions of the absolute value encoder can be realized by adding the valve position information conversion module in an electric actuator, the actuators of different models can be upgraded quickly, and stability, precision and capability of increasing multi-turn counting of the electric actuators are improved.
Description
Technical field
The utility model belongs to the electric actuator field, especially a kind of valve position information translation module that is used for electric actuator.
Background technique
Electric actuator is the terminal actuating equipment in the industrial process control system, it mainly acts on is that control signal with upper computer control system is sent converts corresponding action to, reach the position of closure member in the control valve or the purpose of other controlling mechanism positions, be widely used in industries such as electric power, metallurgy, petrochemical industry, heat supply, cement, building materials, light textile, food.The valve position detection device is the important component part of electric actuator, and two kinds of conduction potentiometer and incremental encoders take place partly to mainly contain in the position of valve position detection device.The conduction potentiometer is cheap, but precision is lower, and poor stability can only realize that 360 degree are with interior position probing; It is higher that the incremental encoder cost conducts electricity the potentiometer cost, and precision is very high, can realize the multi-turn counting, but the control system corresponding with it can not cut off the power supply, otherwise position information will be all chaotic.Adopt absolute value encoder then can solve the deficiency of above-mentioned dual mode to a certain extent, because each position in the absolute value encoder all is unique, just can maintain current position so need not to switch on, and absolute value encoder also has plurality of advantages such as precision height, good stability, volume are little, adopt absolute value encoder as the position of valve position detection device take place part electric actuator will precision, application area and stable aspect remarkable advantages is more arranged.But, because the digital signal of absolute value encoder output RS422 form, all inequality with the digital signal of conduction analog signals of potentiometer and incremental encoder, therefore absolute value encoder can not directly apply in the existing electric actuator, cause at absolute value encoder research and develop separately R﹠D cycle of control mainboard long, the research and development expense is higher, and can only develop the single model electric actuator of using absolute value encoder, thereby can not realize its maximum value in a short time.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of reasonable in design, valve position information translation module that is used for electric actuator of being applicable to different model actuator is provided.
The utility model solves its technical problem and takes following technological scheme to realize:
A kind of valve position information translation module that is used for electric actuator, comprise microprocessor, RS422 circuit, D/A converting circuit, RS485 circuit and power circuit, power circuit is converted to DC electrical source with ac power supply and is connected with each circuit, the input end of RS422 circuit is connected with the position data of absolute value encoder output, the output terminal of RS422 circuit is connected with the input end of microprocessor, and the output terminal of microprocessor is connected with D/A converting circuit, RS485 circuit respectively and exports analogue signal and RS485 data.
And described microprocessor also is connected with display circuit with key circuit by the I/O interface.
And described power circuit is connected and composed by transformer, rectification circuit and power supply chip 7824 and 7805 chips, and its input end is connected with ac power supply, and its output terminal is exported 24V and 5V DC electrical source respectively.
And described microprocessor adopts the ATMEGA88 chip, and described RS422 circuit adopts the MAX488 interface chip, and described D/A converting circuit adopts the AD420 analog-digital chip, and described RS485 circuit adopts the MAX485 interface chip.
And described power circuit connects ac power supply by tenminal block; Described RS422 circuit receives the position data of absolute value encoder output by tenminal block; Described D/A converting circuit and RS485 circuit are outwards exported by tenminal block respectively.
Advantage of the present utility model and good effect are:
The utility model is reasonable in design, by microprocessor the RS422 format digital signal of absolute value encoder is handled and changed, signal format after the conversion is consistent with the output signal form of conduction potentiometer or incremental encoder, increasing this modular converter in electric actuator can accomplish conduction potentiometer or incremental encoder in the existing electric actuator are directly replaced with absolute value encoder, realized quick upgrade function, the ability that has improved its stability, precision and increased the multi-turn counting to different model actuator.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is the circuit diagram of power circuit;
Fig. 3 is the connection diagram of microprocessor and keyboard circuit;
Fig. 4 is the circuit diagram of display circuit;
Fig. 5 is the circuit diagram of RS422 circuit;
Fig. 6 is the circuit diagram of D/A converting circuit;
Fig. 7 is the circuit diagram of RS485 circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described:
A kind of valve position information translation module that is used for electric actuator as shown in Figure 1, comprises microprocessor, RS422 circuit, D/A converting circuit, RS485 circuit, key circuit, display circuit and power circuit.Power circuit is converted to DC electrical source with ac power supply and is connected with each circuit, the input end of RS422 circuit is connected with the position data of absolute value encoder output, the output terminal of RS422 circuit is connected with the input end of microprocessor, and the output terminal of microprocessor is connected with D/A converting circuit, RS485 circuit respectively and exports analogue signal and RS485 data.Below the each several part circuit is described respectively:
Power circuit is connected and composed by tenminal block J1, transformer, rectification circuit and power supply chip 7824 and 7805 chips, as shown in Figure 2, external ac power source is linked into tenminal block J1 and after the transformer step-down, exporting 24V and 5V power supply respectively and be connected to the each several part circuit after rectification circuit is linked into power supply chip 7824 and 7805 respectively provides DC electrical source.
Microprocessor is adopted the ATMEGA88 chip, and it is connected with display circuit with RS422 circuit, D/A converting circuit, RS485 circuit, key circuit by the I/O interface.As shown in Figure 3, three I/O ports of microprocessor are connected with key circuit, realize the button input function by three buttons.As shown in Figure 4, four I/O ports of microprocessor are connected with display circuit, and this display circuit is four LED lamps, and the microprocessor control LED lamp information of carrying out shows.As shown in Figure 5, the RS422 circuit comprises MAX488 interface chip, tenminal block J4 and J5, the position data of outside absolute value encoder output is linked on the MAX488 interface chip by tenminal block J4 and J5, and the MAX488 interface chip converts the position data that receives the position data of RS422 form to and is input in the microprocessor.Microprocessor calculates and changes then the data that receive and is transferred to D/A converting circuit, RS485 circuit respectively by the I/O interface.As shown in Figure 6, D/A converting circuit adopts the AD420 analog-digital chip, and data that its reception microprocessor is exported and the analog amount that is converted into 0～5V are exported through tenminal block J2.As shown in Figure 7, the RS485 circuit adopts the MAX485 interface chip, and data that its reception microprocessor is exported and the data that convert thereof into the RS485 form are outwards exported through tenminal block J3.
Job step of the present utility model is as follows:
1, the position data of absolute value encoder output RS422 form enters the MAX488 chip by tenminal block J4, J5.
2, the position data after the MAX488 interface chip will be changed sends microprocessor ATMEGA88 to.
3, ATMEGA88 calculates and changes transmitting the position data of coming in according to the parameter that is provided with in advance, and is transferred to AD420 chip and MAX485 chip respectively with two kinds of data formats.
4, the MAX485 chip is outwards exported the data that the data of receiving are converted to the RS485 form by J3; The AD420 chip is outwards exported the analog amount that the data of receiving are converted to 0～5V by J2.
5, ATMEGA88 scans key circuit in real time, and after button occurred, ATMEGA88 handled this key information, and gives the LED display circuit with processing information and carry out corresponding information demonstration.
It is emphasized that; embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other mode of executions that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.
Claims (5)
1. valve position information translation module that is used for electric actuator, it is characterized in that: comprise microprocessor, RS422 circuit, D/A converting circuit, RS485 circuit and power circuit, power circuit is converted to DC electrical source with ac power supply and is connected with each circuit, the input end of RS422 circuit is connected with the position data of absolute value encoder output, the output terminal of RS422 circuit is connected with the input end of microprocessor, and the output terminal of microprocessor is connected with D/A converting circuit, RS485 circuit respectively and exports analogue signal and RS485 data.
2. the valve position information translation module that is used for electric actuator according to claim 1, it is characterized in that: described microprocessor also is connected with display circuit with key circuit by the I/O interface.
3. the valve position information translation module that is used for electric actuator according to claim 1, it is characterized in that: described power circuit is connected and composed by transformer, rectification circuit and power supply chip 7824 and 7805 chips, its input end is connected with ac power supply, and its output terminal is exported 24V and 5V DC electrical source respectively.
4. according to each described valve position information translation module that is used for electric actuator of claim 1 to 3, it is characterized in that: described microprocessor adopts the ATMEGA88 chip, described RS422 circuit adopts the MAX488 interface chip, described D/A converting circuit adopts the AD420 analog-digital chip, and described RS485 circuit adopts the MAX485 interface chip.
5. the valve position information translation module that is used for electric actuator according to claim 4, it is characterized in that: described power circuit connects ac power supply by tenminal block; Described RS422 circuit receives the position data of absolute value encoder output by tenminal block; Described D/A converting circuit and RS485 circuit are outwards exported by tenminal block respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201787872U CN202091625U (en) | 2011-05-31 | 2011-05-31 | Valve position information conversion module for electric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201787872U CN202091625U (en) | 2011-05-31 | 2011-05-31 | Valve position information conversion module for electric actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202091625U true CN202091625U (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201787872U Expired - Fee Related CN202091625U (en) | 2011-05-31 | 2011-05-31 | Valve position information conversion module for electric actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202091625U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287571A (en) * | 2011-05-31 | 2011-12-21 | 天津市津达执行器有限公司 | Absolute encoder based valve position information converting module |
| CN107635023A (en) * | 2017-08-22 | 2018-01-26 | 珠海格力电器股份有限公司 | Address management method, device, storage medium and terminal |
-
2011
- 2011-05-31 CN CN2011201787872U patent/CN202091625U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287571A (en) * | 2011-05-31 | 2011-12-21 | 天津市津达执行器有限公司 | Absolute encoder based valve position information converting module |
| CN107635023A (en) * | 2017-08-22 | 2018-01-26 | 珠海格力电器股份有限公司 | Address management method, device, storage medium and terminal |
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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: 20111228 Termination date: 20140531 |