CN206100064U - Two -wire system changer system - Google Patents
Two -wire system changer system Download PDFInfo
- Publication number
- CN206100064U CN206100064U CN201621009212.7U CN201621009212U CN206100064U CN 206100064 U CN206100064 U CN 206100064U CN 201621009212 U CN201621009212 U CN 201621009212U CN 206100064 U CN206100064 U CN 206100064U
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- CN
- China
- Prior art keywords
- circuit unit
- transfer interface
- interface module
- cpu
- communication transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model relates to a two -wire system changer system, including computer, communication conversion module, load resistance, hot resistance temperature changer module and power, power, hot resistance temperature changer module and communication conversion module connect gradually, and load resistance connects in parallel at communication conversion module both ends, and the computer is connected through RS232 interface and communication conversion module. The utility model discloses a communication speed is high, and is more swift to the parameter configuration of product, has reduced system's cost, can satisfy practical application's needs well.
Description
Technical field
The utility model belongs to transducer system technical field, and in particular to a kind of two-wire system transducer system.
Background technology
The instrument and meter for automation of current two-wire system transducer system has largely been replaced by smart instrumentation, its
In an outstanding advantages can be just that parameter configuration is carried out to smart instrumentation by end user or manufacturer, so as to abundant product
The kind and raising performance of product.Most easily method is exactly to enter line number by digital communication and smart instrumentation to parameter configuration one
According to exchange.IEC61158 standards define several field bus protocols, wherein HART, foundation fieldbus H1 and PROFIBUS
PA agreements can be used for two-wire system transducer carries out digital communication.Using foundation fieldbus H1 and PROFIBUS PA agreements
Instrument is completely digital communication instrument, does not typically possess simulation output function.HART protocol is using meeting BELL202 standards
Frequency shift keying (FSK) is superimposed upon data signal as AC signal on the direct current signal of 4～20mA, realizes communication function.On
State three kinds of agreements and inevitably employ modem, so as to implementation is more complicated, increase the cost of instrument.HART
Agreement transmitter adopts FSK technologies, needs to increase the circuits such as modem when product is realized so that product cost is higher,
And there is certain technical difficulty.Many instrument of China's onsite application use its online communication function, and its is good logical
Telecommunication function can not be played, and traditional two-wire system transducer is still propagated its belief on a large scale.The two-wire system transducer system of prior art
System complex structure, traffic rate is low, slow to the parameter configuration of product, therefore, currently urgently developing one kind can overcome the above to ask
The two-wire system transducer system of topic.
Utility model content
For above-mentioned problems of the prior art, the purpose of this utility model is to provide one kind to avoid the occurrence of
State the two-wire system transducer system of technological deficiency.
In order to realize above-mentioned utility model purpose, the technical scheme that the utility model is provided is as follows：
A kind of two-wire system transducer system, including computer, communication transfer interface module, load resistance, resistance and temperature pick-up
Device module and power supply, power supply, thermal resistance temperature transmitter module and communication transfer interface module are sequentially connected, and load resistance is connected in parallel on logical
Letter modular converter two ends, computer is connected by RS232 interfaces with communication transfer interface module.
Further, the power supply is 24V power supplys.
Further, communication transfer interface module include be sequentially connected range-adjusting circuit unit, sending controling circuit unit,
Transformer output circuit unit, filter amplification circuit unit and serial port unit, are connected with communication on transformer output circuit unit
Port.
Further, communication transfer interface module include be sequentially connected range-adjusting circuit unit, sending controling circuit unit,
Transformer output circuit unit, filter amplification circuit unit, CPU and serial port unit, CPU is connected with range-adjusting circuit unit
Connect, on transformer output circuit unit COM1 is connected with.
Further, thermal resistance temperature transmitter module include signal excitation modulate circuit unit, converting unit and according to
The CPU of secondary connection, range-adjusting circuit unit, Signal averaging module, constant current output circuit unit, filter amplification circuit unit,
Signal excitation modulate circuit unit is connected with CPU, and amplifier circuit unit is connected with CPU, and CPU, converting unit and signal are folded
Plus module is sequentially connected.
The two-wire system transducer system that the utility model is provided, including computer, communication transfer interface module, load resistance, heat
Resistance temperature transmitter module and power supply, power supply, thermal resistance temperature transmitter module and communication transfer interface module are sequentially connected, load
Resistor coupled in parallel is connected by RS232 interfaces in communication transfer interface module two ends, computer with communication transfer interface module, simple structure,
Traffic rate is high, faster to the parameter configuration of product, reduces system cost, can well meet the need of practical application
Will.
Description of the drawings
Fig. 1 is structured flowchart of the present utility model；
Fig. 2 is the structured flowchart of the communication transfer interface module of the first structure；
Fig. 3 is the structured flowchart of the communication transfer interface module of second structure；
Fig. 4 is the circuit diagram of the communication transfer interface module of second structure；
Fig. 5 is the structured flowchart of thermal resistance temperature transmitter module；
Fig. 6 is the circuit diagram of thermal resistance temperature transmitter module.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with the accompanying drawings and specifically
Embodiment is described further to the utility model.It should be appreciated that specific embodiment described herein is only to explain this reality
With new, it is not used to limit the utility model.Based on the embodiment in the utility model, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under the premise of creative work, belong to the scope of the utility model protection.
As shown in figure 1, a kind of two-wire system transducer system, including computer, communication transfer interface module, load resistance, thermoelectricity
Resistance temperature transmitter module and power supply, power supply, thermal resistance temperature transmitter module and communication transfer interface module are sequentially connected, load electricity
Resistance is connected in parallel on communication transfer interface module two ends, and computer is connected by RS232 interfaces with communication transfer interface module.The power supply is
24V power supplys.Computer, through communication transfer interface module, with thermal resistance temperature transmitter module half-duplex is carried out by RS232 interfaces
Data exchange, carry out parameter configuration.
Communication transfer interface module can adopt two kinds of structures, as shown in Fig. 2 the communication transfer interface module of the first structure include according to
The range-adjusting circuit unit of secondary connection, sending controling circuit unit, transformer output circuit unit, filter amplification circuit unit
And serial port unit, it is connected with COM1 on transformer output circuit unit；As shown in Figure 3 and Figure 4, the communication of second structure
Modular converter includes range-adjusting circuit unit, sending controling circuit unit, transformer output circuit unit, the filter being sequentially connected
Ripple amplifier circuit unit, CPU and serial port unit, CPU is connected with range-adjusting circuit unit, on transformer output circuit unit
It is connected with COM1.The intelligence degree of the communication transfer interface module of second structure is higher, with higher environmental suitability
And communication reliability.Communication transfer interface module by from RS232 interfaces to signal decayed after export to load resistance,
Then RS232 interfaces are sent after the answer signal of thermal resistance temperature transmitter module being filtered and amplified to again, completes to lead to
Letter transfer process.
As shown in Figure 5 and Figure 6, thermal resistance temperature transmitter module includes signal excitation modulate circuit unit, converting unit
And CPU, range-adjusting circuit unit, Signal averaging module, constant current output circuit unit, the filter amplification circuit being sequentially connected
Unit, signal excitation modulate circuit unit is connected with CPU, and amplifier circuit unit is connected with CPU, CPU, converting unit and letter
Number laminating module is sequentially connected.The CPU of thermal resistance temperature transmitter module completes the collection of thermal resistance signal according to configuration parameter
Work, thermal resistance signal encourages modulate circuit unit to realize resistance to the conversion of voltage signal (mV), voltage signal by signal
(mV) analog-to-digital conversion is realized via the gain amplifier and A/D converter inside CPU, CPU is by the data for gathering through linearisation
With compensation etc. calculate after, obtain need output 4～20mA current values, export to converting unit (change-over circuit is pwm circuit,
Can be by D/A circuitry insteads), and exported to current supply circuit by controlled constant-current source circuit after the adjustment of amplified device, realize two-wire system
Thermal resistance temperature transmitter function.From power line coupling signal of communication after filtering the frequency-selective filtering of amplifier circuit unit and
Signal accesses the RXD ends of CPU after amplifying, response signal declines after being sent by the TXD ends of CPU through range-adjusting circuit unit
After subtracting, export to constant current output circuit unit and power back after Signal averaging module is superimposed with the signal of converting unit output
Road.
A kind of communication means of two-wire system transducer system, including step：Communication transfer interface module will be from RS232 interfaces
To signal decayed after export to load resistance, then the answer signal of thermal resistance temperature transmitter module is filtered
RS232 interfaces are sent to again after ripple and amplification, complete the transfer process that communicates.
The two-wire system transducer system that the utility model is provided, including computer, communication transfer interface module, load resistance, heat
Resistance temperature transmitter module and power supply, power supply, thermal resistance temperature transmitter module and communication transfer interface module are sequentially connected, load
Resistor coupled in parallel is connected by RS232 interfaces in communication transfer interface module two ends, computer with communication transfer interface module, simple structure,
Traffic rate is high, faster to the parameter configuration of product, can well meet the needs of practical application.
Embodiment described above only expresses embodiment of the present utility model, and its description is more concrete and detailed, but and
Therefore the restriction to the utility model the scope of the claims can not be interpreted as.It should be pointed out that for the ordinary skill of this area
For personnel, without departing from the concept of the premise utility, some deformations and improvement can also be made, these belong to this
The protection domain of utility model.Therefore, the protection domain of the utility model patent should be defined by claims.
Claims (5)
1. a kind of two-wire system transducer system, it is characterised in that including computer, communication transfer interface module, load resistance, thermal resistance
Temperature transmitter module and power supply, power supply, thermal resistance temperature transmitter module and communication transfer interface module are sequentially connected, load resistance
Communication transfer interface module two ends are connected in parallel on, computer is connected by RS232 interfaces with communication transfer interface module.
2. two-wire system transducer system according to claim 1, it is characterised in that the power supply is 24V power supplys.
3. two-wire system transducer system according to claim 1, it is characterised in that communication transfer interface module includes being sequentially connected
Range-adjusting circuit unit, sending controling circuit unit, transformer output circuit unit, filter amplification circuit unit and serial ports
Unit, on transformer output circuit unit COM1 is connected with.
4. two-wire system transducer system according to claim 1, it is characterised in that communication transfer interface module includes being sequentially connected
Range-adjusting circuit unit, sending controling circuit unit, transformer output circuit unit, filter amplification circuit unit, CPU and
Serial port unit, CPU is connected with range-adjusting circuit unit, and on transformer output circuit unit COM1 is connected with.
5. two-wire system transducer system according to claim 1, it is characterised in that thermal resistance temperature transmitter module includes
Signal excitation modulate circuit unit, converting unit and the CPU being sequentially connected, range-adjusting circuit unit, Signal averaging module,
Constant current output circuit unit, filter amplification circuit unit, signal excitation modulate circuit unit is connected with CPU, amplifying circuit list
Unit is connected with CPU, and CPU, converting unit and Signal averaging module are sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621009212.7U CN206100064U (en) | 2016-08-30 | 2016-08-30 | Two -wire system changer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621009212.7U CN206100064U (en) | 2016-08-30 | 2016-08-30 | Two -wire system changer system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206100064U true CN206100064U (en) | 2017-04-12 |
Family
ID=58477417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621009212.7U Expired - Fee Related CN206100064U (en) | 2016-08-30 | 2016-08-30 | Two -wire system changer system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206100064U (en) |
-
2016
- 2016-08-30 CN CN201621009212.7U patent/CN206100064U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20200830 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |