CN204514333U - Two-wire system analog signal isolating crossover display terminal - Google Patents
Two-wire system analog signal isolating crossover display terminal Download PDFInfo
- Publication number
- CN204514333U CN204514333U CN201520227370.9U CN201520227370U CN204514333U CN 204514333 U CN204514333 U CN 204514333U CN 201520227370 U CN201520227370 U CN 201520227370U CN 204514333 U CN204514333 U CN 204514333U
- Authority
- CN
- China
- Prior art keywords
- circuit
- collection portion
- display
- wire system
- analog signal
- 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
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model discloses a kind of two-wire system analog signal isolating crossover display terminal, it is characterized in that comprising collection portion and display part; Collection portion is located at data sampling sensor place, is provided with low-temperature-sensitive sampling resistor I-V translation circuit, controller, memory circuit, current foldback circuit, power converting circuit and feedback protection circuit; Display part is located in pulpit, is provided with digital display circuit and alarm drive circuit; The input standard 4-20mA current signal end that current foldback circuit and low-temperature-sensitive sampling resistor I-V translation circuit obtain with sensor is respectively connected, supply convertor is connected with current foldback circuit, feedback protection circuit respectively, and digital display circuit, alarm drive circuit, memory circuit are connected with controller respectively; Antijamming capability is strong, and data precision is high, and circuit power consumption is low, can prevent connecing instead, and self-shield, improves the reliability of Instrument use effectively.
Description
Technical field
The utility model relates to a kind of data display equipment, and what be specifically related to is a kind of two-wire system analog signal isolating crossover display terminal.
Background technology
Along with the progress of science and technology, industrial data are all represented by electronic instrument widely, as oil, chemical industry, environmental protection, the fields such as mining and electric power, temperature, pressure, flow, the physical quantitys such as liquid level need Real-time Collection, grasp Production development is understood for engineering personnel, existing instrument is all gather simulating signal by spot sensor, convert 4-20mA analog quantity to directly to show in gauge outfit, but by environment temperature, humidity, the impact of the disturbing factors such as signal transmission distance, the data precision that analog meter shows is not high, zero point, imbalance was large, this still awaits technological innovation and solves.
Summary of the invention
In order to solve the problem, the utility model provides a kind of two-wire system analog signal isolating crossover display terminal.
The technical scheme that the utility model provides is: a kind of two-wire system analog signal isolating crossover display terminal, is characterized in that comprising collection portion and display part; Collection portion is located at data sampling sensor place, is provided with low-temperature-sensitive sampling resistor I-V translation circuit, controller, memory circuit, current foldback circuit, power converting circuit and feedback protection circuit; Display part is located in pulpit, is provided with digital display circuit and alarm drive circuit; The input standard 4-20mA current signal end that current foldback circuit and low-temperature-sensitive sampling resistor I-V translation circuit obtain with sensor is respectively connected; supply convertor is connected with current foldback circuit, feedback protection circuit respectively, and digital display circuit, alarm drive circuit, memory circuit are connected with controller respectively.
Further, wired connection is passed through between described collection portion and display part.
Further, wireless connections are passed through between described collection portion and display part.
The utility model collection terminal and display end are by digital signal transfers information, and antijamming capability is strong, and data precision is high; can obtain working power for data conversion and transmission from marking current, circuit power consumption is low, can prevent connecing instead; self-shield, improves the reliability of Instrument use effectively.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment theory diagram.
Fig. 2 is the utility model embodiment low-temperature-sensitive sampling resistor I-V translation circuit, controller, current foldback circuit, power converting circuit and feedback protection circuit schematic diagram.
Fig. 3 is that the utility model embodiment controller periphery connects wiring diagram.
Fig. 4 is the utility model embodiment digital display circuit schematic diagram.
Fig. 5 is the utility model embodiment memory circuit schematic diagram.
Fig. 6 is that the utility model embodiment drives warning circuit schematic diagram.
Fig. 7 is the passive isolating converter schematic diagram of the utility model embodiment.
Fig. 8 is the active isolating converter schematic diagram of the utility model embodiment.
Embodiment
The utility model embodiment is as shown in Fig. 1 to 8, and this two-wire system analog signal isolating crossover display terminal comprises collection portion and display part; Collection portion is located at data sampling sensor place, is provided with low-temperature-sensitive sampling resistor I-V translation circuit, controller, memory circuit, current foldback circuit, power converting circuit and feedback protection circuit; Display part is located in pulpit, is provided with digital display circuit and alarm drive circuit; The input standard 4-20mA current signal end that current foldback circuit and low-temperature-sensitive sampling resistor I-V translation circuit obtain with sensor is respectively connected; supply convertor is connected with current foldback circuit, feedback protection circuit respectively, and digital display circuit, alarm drive circuit, memory circuit are connected with controller respectively.
During use, utilize three-terminal voltage-stabilizing pipe from the current return of 4-20mA, obtain the operating voltage of system, by the anti-stop signal reversal connection of diode, overcurrent protection is realized by resettable fuse.Through the voltage signal that low-temperature-sensitive resistance is converted into mV level, 4-20mA signal delivers to that controller carries out amplifying, AD conversion and filtering process.From marking current, obtain working power by three-terminal voltage-stabilizing pipe, the mode of connection of system can be simplified, when input current is less, only have 1mA just can provide normal operating voltage to system.The present embodiment controller operational mode power consumption 300uA, standby mode 3uA, park mode 1uA, power consumption is lower.As long as faint mV magnitude voltage signals, conversion just can be realized.This kind of circuit can also expand to the mode of connection of three-wire system, as long as removed by current sampling resistor, access mV signal, after adding current-limiting resistance to three-terminal voltage-stabilizing pipe in addition, an external power supply can form active mV level Signal aspects gauge outfit.Controller transfers simulating signal to digital signal, and drive numeral method by a slice driving chip, power consumption is little.Button can also be set for optimum configurations and adjustment; adjustable resistance zeroising, tune full scale, tune sensitivity; improve the convenience of production, memory circuit is used for data and stores and power down protection, and its communication with controller is realized by digital and clock two pins.Two alerting signals are as drive singal after light-coupled isolation, and system is safer; Active isolation can be adopted during use to change and active isolation conversion, carry out data conversion, safety coefficient is higher, more can adopt wireless or wired connection according to needs between collection portion and display part.
The utility model collection terminal and display end are by digital signal transfers information, and antijamming capability is strong, and data precision is high; can obtain working power for data conversion and transmission from marking current, circuit power consumption is low, can prevent connecing instead; self-shield, improves the reliability of Instrument use effectively.
Be only the utility model preferred embodiment in sum, all equivalence modifications of doing according to the application and prior art are added and are all considered as the utility model technology category.
Claims (3)
1. a two-wire system analog signal isolating crossover display terminal, is characterized in that comprising collection portion and display part; Collection portion is located at data sampling sensor place, is provided with low-temperature-sensitive sampling resistor I-V translation circuit, controller, memory circuit, current foldback circuit, power converting circuit and feedback protection circuit; Display part is located in pulpit, is provided with digital display circuit and alarm drive circuit; The input standard 4-20mA current signal end that current foldback circuit and low-temperature-sensitive sampling resistor I-V translation circuit obtain with sensor is respectively connected; supply convertor is connected with current foldback circuit, feedback protection circuit respectively, and digital display circuit, alarm drive circuit, memory circuit are connected with controller respectively.
2. two-wire system analog signal isolating crossover display terminal according to claim 1, is characterized in that passing through wired connection between described collection portion and display part.
3. two-wire system analog signal isolating crossover display terminal according to claim 1, is characterized in that passing through wireless connections between described collection portion and display part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520227370.9U CN204514333U (en) | 2015-04-16 | 2015-04-16 | Two-wire system analog signal isolating crossover display terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520227370.9U CN204514333U (en) | 2015-04-16 | 2015-04-16 | Two-wire system analog signal isolating crossover display terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204514333U true CN204514333U (en) | 2015-07-29 |
Family
ID=53712301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520227370.9U Expired - Fee Related CN204514333U (en) | 2015-04-16 | 2015-04-16 | Two-wire system analog signal isolating crossover display terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204514333U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764469A (en) * | 2015-04-16 | 2015-07-08 | 于广沅 | Double-line-mode analog signal isolation converter |
| CN110955172A (en) * | 2019-10-30 | 2020-04-03 | 中国船舶重工集团公司第七一九研究所 | Electric isolation type 0-20 mA driving circuit with output self-detection function |
-
2015
- 2015-04-16 CN CN201520227370.9U patent/CN204514333U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764469A (en) * | 2015-04-16 | 2015-07-08 | 于广沅 | Double-line-mode analog signal isolation converter |
| CN110955172A (en) * | 2019-10-30 | 2020-04-03 | 中国船舶重工集团公司第七一九研究所 | Electric isolation type 0-20 mA driving circuit with output self-detection function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104299408A (en) | Temperature monitoring device for high-voltage electrical equipment | |
| CN204514333U (en) | Two-wire system analog signal isolating crossover display terminal | |
| CN103454004A (en) | Digital multi-point temperature measuring system and achieving method | |
| CN203101474U (en) | Electrification detector for high-voltage electric system | |
| CN202562673U (en) | Strain acquisition system based on voltage compensation | |
| CN203053476U (en) | Temperature and humidity detection system | |
| CN204479558U (en) | Intelligent gas acquisition probe | |
| CN104764469A (en) | Double-line-mode analog signal isolation converter | |
| CN205506244U (en) | Small -size temperature measurement monitored control system based on FPGA | |
| CN105632151A (en) | Industry on-site digital signal transmission method | |
| CN204609870U (en) | A kind of well testing data logger | |
| CN204189300U (en) | A kind of high voltage electric equipment device for detecting temperature | |
| CN206740259U (en) | A kind of distributed temperature measuring system based on STC single-chip microcomputers | |
| CN205343028U (en) | Electric tool safety protection system | |
| CN204809843U (en) | Digital non - electric quantity versatile protector | |
| CN216349296U (en) | Pressure transmitter | |
| CN216895000U (en) | Three-parameter combined transmitter | |
| CN203899005U (en) | Remote monitoring system for fire-detecting pipe type fire extinguishing device | |
| CN103335740A (en) | Economic GPS telemetric terminal | |
| CN204741265U (en) | Digital line protection, measurement and control apparatus | |
| CN203310537U (en) | GPS telemetry terminal machine | |
| CN204809844U (en) | Digital non - electric quantity is synthesized does not have discontinuous protection device | |
| CN202886320U (en) | Monitoring instrument | |
| CN204808015U (en) | Fast protection device is synthesized to digital non - electric quantity | |
| CN202562654U (en) | Temperature transmitter detector |
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 |
Granted publication date: 20150729 Termination date: 20190416 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |