CN202630971U - Input/output (I/O) programmable setting intelligent transmitter - Google Patents
Input/output (I/O) programmable setting intelligent transmitter Download PDFInfo
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- CN202630971U CN202630971U CN 201220192198 CN201220192198U CN202630971U CN 202630971 U CN202630971 U CN 202630971U CN 201220192198 CN201220192198 CN 201220192198 CN 201220192198 U CN201220192198 U CN 201220192198U CN 202630971 U CN202630971 U CN 202630971U
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Abstract
The utility model discloses an input/output (I/O) programmable setting intelligent transmitter and relates to the technical field of power system equipment calibration. A main control CPU is respectively connected with an analog-to-digital (AD) conversion chip and a digital-to-analog (DA) conversion chip through serial peripheral interface (SPI) buses, an RS232 programming and debugging interface and an RS485 communication interface are respectively connected with the main control CPU. An input and output terminal is provided with two isolation pressure-resistant division magnetic grids; and the communication ports of the input and output terminal are isolated, so that the application safety of the transmitter in an industrial site is ensured. A user automatically programs and corrects the precision of the transmitter through the RS232 programming and debugging interface, and upgrades the firmware of the transmitter. The sampling data is acquired in real time through the far end of the RS485 communication interface, the far end adjusts the input, output and transmission parameters of the transmitter, and corrects the transmission precision. The input and output terminal is detachable, so that safety hidden hazards are reduced. The isolation pressure resistance is 500Vpp, the transmission precision is 0.2 grade, and the I/O programmable setting intelligent transmitter has a compact size, and is thin.
Description
Technical field
The utility model belongs to power system device calibration technology field, especially a kind of I/O type intelligent transducer that is provided with able to programme.
Background technology
In electric system, having used the signal transmitting device in a large number is that transmitter is adopted the signal of equipment reception with the suitable teletransmission of various signal transformations one-tenth at scene with suitable number.But the signal type of in the process that reality is used, finding the transmitter input has multiple: linear resistance signal, voltage signal, current signal, thermal resistance PT100 etc.Scope also has nothing in common with each other, and for example voltage has 1 ~ 5V input among a small circle, 0 ~ 300V is also arranged in a big way.Use the equipment of PT100 thermometric also to have the different temperature measurement range.Because it is different or application purpose is different that number is adopted the manufacturer of equipment, its signal type that can receive is also different with scope, so require the output of transmitter also varied.Especially number is adopted certain signal conversion relation is arranged between equipment and the remote monitoring software, and on-site signal also need carry out certain conversion to on-site signal in order to mate this conversion relation in the process of signal transmitting.Generally speaking, the isolation transmit situation of on-site signal is various and complicated.In the process of using transmitter, need in the transmitter of the series that transmitter manufacturer provides, pick out suitable model; Some complicated scenario that becomes possibly need multistage change to send just and can achieve the goal, and some non-standard change is sent and adopted common transmitter or even can not implement.For example; In some large complicated application, may use the data acquisition equipment of different manufacturers various criterion; Possibly there is different transformation relations between the data acquisition equipments at different levels; At this time need use many conventional general transmitters that these changes are sent to row conversion and coupling, the acquisition precision of on-site signal will inevitably descend, and mostly occur the more possibility of fault of the transmitter that uses is just big more.The inventor has developed a kind of general, easy-to-use to above-mentioned defective, user-programmable is provided with input and output, and small-sized signals collecting becomes send device.Versatility promptly only needs the device of a model can satisfy all needs; Ease for use is meant to be sent when concerning convenient and swift in input and output type and the scope of change transmitter and change; Miniaturization is on-the-spot in the transmitter model of using in order to satisfy directly replacement, and the on-the-spot restriction that often receives installing space needs the transmitter advantages of small volume, and particularly thickness is little; Low cost then is suitable for large-scale application.Require this device to have data acquisition simultaneously and become the function send, it can gather the resistance of industry spot, DC voltage, and the signal that DC current is three types is through sending to background devices with certain form through the RS485 PORT COM after the true value computing.This transmitter also can be with resistance, DC voltage, and the signal transformation that DC current is three types becomes the backstage number to adopt needed signal type of equipment and scope.
The utility model content
The purpose of the utility model provides a kind of I/O type intelligent transducer that is provided with able to programme, makes it to have general, easy-to-use, user-programmable input and output are set, and the signals collecting that volume is little becomes the device that send function.
The technical solution that realizes the purpose that this is novel is following: a kind of I/O type intelligent transducer that is provided with able to programme; Comprise master cpu, Switching Power Supply; It is characterized in that; Also include input terminal, lead-out terminal, RS232 programming and debugging interface, RS485 communication interface, AD conversion chip and DA conversion chip; Described master cpu is connected with AD conversion chip and DA conversion chip respectively through spi bus; The AD conversion chip is connected with input terminal through pin AIN2 (+), AIN1 (+), AIN1 (-), and the DA conversion chip is connected with lead-out terminal through pin VOUT, IOUT; The RS232 programming is connected with master cpu respectively with debugging interface, RS485 communication interface.
Further, said input terminal, lead-out terminal have two isolation magnetic grids of isolating withstand voltage 500Vp-p, and input terminal, lead-out terminal, communication port are what to have been isolated mutually, have guaranteed the security that transmitter is used in industry spot.
Further, said input and output terminal is dismountable, makes easy-to-connect, has reduced potential safety hazard.
Further, said RS232 programming and debugging interface make the user programme and accuracy correction to transmitter through this interface utilization programming and debug tool software, and the user also can upgrade to the transmitter firmware through this interface.
Further, said RS485 communication interface makes the user pass through this interface far-end and obtains sampled data in real time, the input of far-end adjustment transmitter, and parameter is sent in output and change, and becomes and send accuracy correction.The user can send relation to carry out programming in a big way to the input and output change according to graphical programming software, is calculated automatically to become by software and send parameter, and the user clicks the software setting button after programming finishes, and software send parameter downloads to arrive transmitter change automatically.
This novel principle of work is, transmitter uses 16 AD conversion chips of a slice that input signal is carried out sampling with high precision, and the data that sampling obtains become to send through CPU and send the DA conversion chip to after the computing and convert voltage or current signal output to.Transmitter offers the RS485 communication interface after the input signal that collects is passed through the true value computing through CPU, and the RS485 communication interface is according to certain communication protocol and background computer swap data.The user can obtain sampled data in real time through RS485 communication interface far-end, the input of far-end adjustment transmitter, and parameter is sent in output and change, and becomes and send accuracy correction.
Compare with prior art, this novel advantage and beneficial effect is following:
1, this transmitter principal feature is exactly that the user can be from main programming.The user can programme to the type of input physical quantity, can select the resistance input, DC voltage input, DC current input; Can also programme and select the type and the scope of output.Therefore this transmitter has stronger versatility.
2, input and output are isolated, and isolate withstand voltage 500Vpp.
3, high precision becomes and send 0.2 grade of precision.
4, slim design makes and the transmitter advantages of small volume is fit to very much compact power equipment installation environment.
Description of drawings
Fig. 1 is this novel structured flowchart synoptic diagram.
Fig. 2 is this novel electrical block diagram.
This novel described imput output circuit synoptic diagram of Fig. 3.
Fig. 4 is this novel embodiment synoptic diagram.
Fig. 5, Fig. 6, Fig. 7 are respectively this novel use embodiment synoptic diagram.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, this is novel to comprise master cpu, Switching Power Supply, also comprise input and output terminal, RS232 programming and debugging interface, RS485 communication interface, AD conversion chip and DA conversion chip; Described master cpu is connected with AD conversion chip and DA conversion chip respectively through spi bus, and the RS232 programming is connected with master cpu respectively with debugging interface, RS485 communication interface.Master cpu is selected the STC12C5A60S2 chip for use, and CPU is through the MOSI of spi bus, MISO, and SCLK, this three signal wires and AD-CS, AD-/CS, this " Sangen " tablet of DA-CS selects signal and AD and DA to link together.AD-/DRDY, AD-/RESET are the control signals of AD chip.DA-LATCH, DA-CLEAR, DA-/FAULT are the control signals of DA.The AD conversion chip is selected a slice AD7705 for use, is connected with input terminal through pin AIN2 (+), AIN1 (+), AIN1 (-), and the DA conversion chip is selected a slice DA:AD5412 for use; Be connected with lead-out terminal through pin VOUT, IOUT; RS232 programming and debugging interface select for use the SP232 chip to constitute programming and debug i/f circuit, and RS485 communication interface circuit is selected SP485 for use.Switching Power Supply has used a slice TO242 single-chip switching power supply IC to constitute.
Know that referring to Fig. 3 said input and output terminal has two isolation magnetic grids of isolating withstand voltage 500Vp-p, making its input terminal, lead-out terminal, communication interface is to isolate mutually, has guaranteed the security that transmitter is used in industry spot.Imput output circuit comprises a slice AD:AD7705, a slice DA:AD5412.ADUM1401, ADUM1201 isolate magnetic grid.AD8276, AD8603 have constituted a 5mA excitation current source that is used for measuring resistance.And input and output terminal is dismountable, makes easy-to-connect, reduced potential safety hazard.For example, the user installation space is limited, the wiring difficulty, and this design makes the user can terminal be dismantled, and line is connected the back insert transmitter, easy-to-connect safety.
The connection of Switching Power Supply: Switching Power Supply is exported three groups of voltages: one group+5V offers AD, and one group+5V gives CPU and communication interface, and+15V and-15V supply power to DA.
This transmitter has a RS232 programming and debugging interface.The user can programme and accuracy correction to transmitter through this interface utilization programming and debug tool software, and the user also can upgrade to the transmitter firmware through this interface.
Can know that referring to Fig. 4 the design of RS232 programming and debugging interface is very important at this.The user is programmed and accuracy correction to transmitter through this interface utilization programming and debug tool software, and the user also can carry out field upgrade to the transmitter firmware through this interface.For example; When transmitter is used for data acquisition; If when the communications protocol between transmitter and back-end data collection are calculated changed, the user only need use the supporting upper computer software of this transmitter just can carry out field upgrade to its firmware to adapt to this variation.The user does not need the transmitter that more renews in this course, need not remove transmitter from the scene yet.
Said RS485 communication interface makes the user pass through this interface far-end and obtains sampled data in real time, the input of far-end adjustment transmitter, and parameter is sent in output and change, and becomes and send accuracy correction.Under the support of this transmitter detail programming software, it is very directly perceived and convenient that the user uses this software that it is programmed.The user can increase transmitter type as required, and transmitter input and output type, scope independently are set.Proofread and correct the transmitter precision and transmitter is programmed.This transmitter supporting upper computer software plays important effect and mainly is based on Event triggered and comes work in programming.
Relatively more crucial incident has three:
1, connects the button click event.Comprise beginning, initialization serial ports, send information inquiry bag, end step.
2, the button click event is set.Comprise beginning, judge whether data are set effective, if, read to become and send parameter, send packet is set, finish; If, then do not get into end step.
3, the serial ports timed events is set.Comprise beginning, judge, receive an active data bag,, receive a packets of information if continue to judge, if, lastest imformation; If not, continue to judge, receive a real-time information bag, if the updating real-time data connect button click event step; If not, continue again to judge, receive packet is set, if, upgrade being provided with, if not, get into end step.
Provide the user to use embodiment following:
The user uses for ease, and we have designed a simple input signal conditioning circuit, and the user only need regulate the resistance of three precision resistances, and joins with our graphical programming software and just can generate oneself needed transmitter type fast.We explain the programming process of transmitter with an example.
For example: that the user needs an input end connection is thermal resistance PT100,0 ~ 150 ℃ of temperature measurement range, the transmitter of the voltage signal of corresponding temperature output 1-5V.
STEP1: the user is provided with input:
Shown in Figure 5, the user at first selects the AD passage, here our SELCH 1.Input type is set then, this setting be PT100, the PT100 thermal resistance is a passive device, when it is measured, needs an exciting current, chooses this here, and the size of input stimulus electric current: 5mA.Next be provided with the input maximal value be 150 ℃, minimum value is 0 ℃. in input window is set and can sees patterned input synoptic diagram, the connection situation of representing on the synoptic diagram and actual be duplicate.
STEP2: the user is provided with output:
Shown in Figure 6, our output type of setting is a voltage as required, output maximal value 5V, minimum value 1V;
Shown in Figure 7, STEP3: the user is provided with a self-defining transmitter model;
STEP4: the user clicks to accomplish and adds button:
Programming software calculates the needed change of transmitter internal arithmetic automatically and send parameter.
STEP5: the user clicks button is set, and send parameter downloads to arrive transmitter change, accomplishes the programming of transmitter.
It is thus clear that it is very flexibly with easily that the user programmes to transmitter.
Embodiment is following for user's modification input and output type:
Before the modification: model is: TSM1804, input type are resistance, and scope is 0-180 Ω; Output type is an electric current, and scope is 4-20mA.
Revise the back: model is: TSM100, input type are PT100, and scope is that 100-138.5 Ω corresponding temperature scope is 0-100 ℃; Output type is a voltage, and scope is 0-5V.
This transmitter has possessed the graphical user program tool software of a cover, and it is very directly perceived with easily that the user uses this software that it is programmed.The user can send relation to carry out programming in a big way to the input and output change according to graphical programming software, is calculated automatically to become by software and send parameter, and the user clicks the software setting button after programming finishes, and software send parameter downloads to arrive transmitter change automatically.
Claims (3)
1. the I/O type intelligent transducer that is provided with able to programme comprises master cpu, Switching Power Supply, it is characterized in that, also includes input terminal, lead-out terminal, RS232 programming and debugging interface, RS485 communication interface, AD conversion chip and DA conversion chip; Described master cpu is connected with AD conversion chip and DA conversion chip respectively through spi bus; The AD conversion chip is connected with input terminal through pin AIN2 (+), AIN1 (+), AIN1 (-), and the DA conversion chip is connected with lead-out terminal through pin VOUT, IOUT; The RS232 programming is connected with master cpu respectively with debugging interface, RS485 communication interface.
2. a kind of intelligent transducer that is provided with able to programme according to claim 1 is characterized in that, said input terminal, lead-out terminal have an isolation magnetic grid of isolating withstand voltage 500Vp-p respectively.
3. a kind of intelligent transducer that is provided with able to programme according to claim 2 is characterized in that said input terminal, lead-out terminal are dismountable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220192198 CN202630971U (en) | 2012-04-28 | 2012-04-28 | Input/output (I/O) programmable setting intelligent transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220192198 CN202630971U (en) | 2012-04-28 | 2012-04-28 | Input/output (I/O) programmable setting intelligent transmitter |
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| CN202630971U true CN202630971U (en) | 2012-12-26 |
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| CN 201220192198 Expired - Lifetime CN202630971U (en) | 2012-04-28 | 2012-04-28 | Input/output (I/O) programmable setting intelligent transmitter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636192A (en) * | 2012-04-28 | 2012-08-15 | 成都电业局 | Input/output (I/O) programmable setting intelligent transmitter |
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2012
- 2012-04-28 CN CN 201220192198 patent/CN202630971U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636192A (en) * | 2012-04-28 | 2012-08-15 | 成都电业局 | Input/output (I/O) programmable setting intelligent transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20131230 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131230 Address after: 610021 No. 17 Dongfeng Road, Chengdu, Sichuan, Jinjiang District Patentee after: Chengdu Power Bureau Patentee after: State Grid Corporation of China Address before: 610021 No. 17 Dongfeng Road, Chengdu, Sichuan, Jinjiang District Patentee before: Chengdu Power Bureau |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |
|
| CX01 | Expiry of patent term |