CN106595881A - Intelligent temperature transmitter based on SHC16L - Google Patents
Intelligent temperature transmitter based on SHC16L Download PDFInfo
- Publication number
- CN106595881A CN106595881A CN201611251896.6A CN201611251896A CN106595881A CN 106595881 A CN106595881 A CN 106595881A CN 201611251896 A CN201611251896 A CN 201611251896A CN 106595881 A CN106595881 A CN 106595881A
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- CN
- China
- Prior art keywords
- shc16l
- micro
- control unit
- transmitter based
- conversion chips
- Prior art date
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000011540 sensing material Substances 0.000 description 2
- 101100522110 Oryza sativa subsp. japonica PHT1-10 gene Proteins 0.000 description 1
- 101100522109 Pinus taeda PT10 gene Proteins 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2219/00—Thermometers with dedicated analog to digital converters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention discloses an intelligent temperature transmitter based on SHC16L. A signal input circuit is connected with a micro-control unit through an A/D conversion chip, the output end of the micro-control unit is connected with a D/A conversion chip; and the signal input circuit includes a broken line detection circuit and a cold junction compensation circuit. Through adoption of the technical scheme of taking the SHC16L as the MCU, the temperature signal is linearly converted to the direct current standard signals of 4-20mA, and the measured temperature is displayed.
Description
Technical field
The present invention relates to a kind of transmitter, more particularly to a kind of Intellectual Thermal Transmitter based on SHC16L.
Background technology
SHCSHC16L family chips are the super low-power consumptions of a battery for being intended to and extending portable measurement system
MCU.SHC16L adopts enhanced 80C251 kernels, and the disposal ability under identical clock frequency is standard 8xC251 disposal ability
3 times, and 40 times faster than standard type 80C51 disposal ability, and instruct completely compatible with standard 8xC251/80C51.
In the hot environments such as precise electronic factory environmental temperature monitoring, chemical plant, laboratory ambient temperature control, it is right to need
The change of ambient temperature carries out real-time omnibearing monitoring.The conventional temperature measuring device of measurement has two kinds of thermocouple and thermal resistance.Heat
Galvanic couple according to the difference of temperature sensing material, there is the Graduation Number that K, E, S, B, J, T, R are different again.Thermal resistance is according to temperature sensing material and 0 DEG C
When measuring resistance it is different, have the types such as PT100, PT10, CU100, CU50.Temperature transmitter can coordinate with thermal resistance and thermocouple
Use, but the thermocouple of these different models and thermal resistance, their measurement temperature scope and output area it is far different, this
Challenge is brought to transmitter input channel and signal condition design, to manufacturer no small trouble, traditional analog are brought
Circuit is difficult to make general temperature transmitter.
Due to the reduction and the emergence of new device of microprocessor power consumption, with the intelligence of " A/D+ microprocessor+D/A " pattern
Can temperature transmitter, have very big advantage at aspects such as signal processing, certainty of measurement, instrument maintenance and maintenances, be temperature from now on
The main development direction of transmitter.
The content of the invention
The invention discloses a kind of Intellectual Thermal Transmitter based on SHC16L, to provide a kind of low-power consumption high computing effect
The transmitter of rate.
The above-mentioned purpose of the present invention is achieved through the following technical solutions：
A kind of Intellectual Thermal Transmitter based on SHC16L, wherein, a signal input circuit is micro- with one by an A/D conversion chips
Control unit connects, and the outfan of the micro-control unit connects a D/A conversion chips；The signal input circuit includes：It is disconnected
Line detection circuit, cold junction compensation circuit.
Intellectual Thermal Transmitter based on SHC16L as above, wherein, the micro-control unit is also connected to repeatedly one
Alarm device.
Intellectual Thermal Transmitter based on SHC16L as above, wherein, there is the D/A conversion chips electric current to export
End, the current output terminal of the D/A conversion chips is that the A/D conversion chips, the micro-control unit are powered.
Intellectual Thermal Transmitter based on SHC16L as above, wherein, the signal input circuit connects three-wire system
Thermal resistance, four-wire system thermal resistance, thermocouple.
Intellectual Thermal Transmitter based on SHC16L as above, wherein, also including a shell of transducer, the A/D
Conversion chip, the micro-control unit, the D/A conversion chips are arranged in the transmitter enclosure body.
In sum, as a result of above-mentioned technical proposal, the present invention is by being based on SHC16L as the technical scheme of MCU
Temperature signal linearly is transformed into the direct current standard signal of 4 ~ 20mA, and shows dut temperature.
Description of the drawings
Fig. 1 is circuit block diagram of the present invention based on the Intellectual Thermal Transmitter of SHC16L.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples：
Fig. 1 is circuit block diagram of the present invention based on the Intellectual Thermal Transmitter of SHC16L, refers to Fig. 1, and one kind is based on SHC16L
Intellectual Thermal Transmitter, wherein, a signal input circuit 1 is connected by an A/D conversion chips 2 with a micro-control unit 3, micro-
Control unit（MCU）3 outfan connects a D/A conversion chips 4；Signal input circuit 1 includes：Break detection circuit, cold end
Compensation circuit.The function of the present invention is that temperature signal linearly is transformed into the direct current standard signal of 4 ~ 20mA, and shows tested
Temperature.
Further, micro-control unit 3 is also connected to repeatedly an alarm device.
Further, D/A conversion chips 4 have current output terminal, and the current output terminal of D/A conversion chips 4 is A/D conversions
Chip 2, micro-control unit 3 are powered.
Further, signal input circuit 1 connects respectively three-wire system thermal resistance, four-wire system thermal resistance, thermocouple and is surveyed
Examination.
Further, also including a shell of transducer, A/D conversion chips 2, micro-control unit 3, D/A conversion chips 4 are installed
In transmitter enclosure body.
The invention also discloses a kind of using method of the Intellectual Thermal Transmitter based on SHC16LA32QN48 chips, its
In, thermocouple or 420uA constant-current sources are sent by the electric potential signal that thermal resistance is produced through input circuit, AD sampling units
Enter micro-control unit, micro-control unit is processed signal and exports 4-20mA electric currents by D/A conversion chips.Intelligent temperature
Transmitter is designed with the mode that software and hardware combines with microprocessor as core, entirely, and using software intelligent functions are realized.
Technical scheme significantly enhances the stability and precision of transmitter, is designed using extremely low power dissipation, tool
There is longer service life, simple structure is easy for installation, strong antijamming capability.The present invention can be in wider temperature range and strong
Work under the mal-conditions such as strong vibration, be applicable to industrial undertaking and measure and control production process in process of production.
Claims (5)
1. a kind of Intellectual Thermal Transmitter based on SHC16L a, it is characterised in that signal input circuit changes core by an A/D
Piece is connected with a micro-control unit, and the outfan of the micro-control unit connects a D/A conversion chips；The signal input circuit
Including：Break detection circuit, cold junction compensation circuit.
2. the Intellectual Thermal Transmitter based on SHC16L according to claim 1, it is characterised in that the micro-control unit
An alarm device is also connected to repeatedly.
3. the Intellectual Thermal Transmitter based on SHC16L according to claim 1, it is characterised in that the D/A changes core
Piece has current output terminal, and the current output terminal of the D/A conversion chips is the A/D conversion chips, the micro-control unit
Power supply.
4. the Intellectual Thermal Transmitter based on SHC16L according to claim 1, it is characterised in that the signal input electricity
Road connection three-wire system thermal resistance, four-wire system thermal resistance, thermocouple.
5. the Intellectual Thermal Transmitter based on SHC16L according to claim 1, it is characterised in that also including a transmitter
Housing, the A/D conversion chips, the micro-control unit, the D/A conversion chips are arranged in the transmitter enclosure body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251896.6A CN106595881A (en) | 2016-12-30 | 2016-12-30 | Intelligent temperature transmitter based on SHC16L |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251896.6A CN106595881A (en) | 2016-12-30 | 2016-12-30 | Intelligent temperature transmitter based on SHC16L |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106595881A true CN106595881A (en) | 2017-04-26 |
Family
ID=58605294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611251896.6A Pending CN106595881A (en) | 2016-12-30 | 2016-12-30 | Intelligent temperature transmitter based on SHC16L |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106595881A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026486A (en) * | 2023-01-29 | 2023-04-28 | 中国长江电力股份有限公司 | But human-computer interaction's multi-output temperature changer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527036A (en) * | 2015-12-30 | 2016-04-27 | 上海自动化仪表有限公司 | Intelligent temperature transmitter based on CMC (code for magnetic characters) |
| CN206399541U (en) * | 2016-12-30 | 2017-08-11 | 上海自动化仪表有限公司 | Intellectual Thermal Transmitter based on SHC16L |
-
2016
- 2016-12-30 CN CN201611251896.6A patent/CN106595881A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527036A (en) * | 2015-12-30 | 2016-04-27 | 上海自动化仪表有限公司 | Intelligent temperature transmitter based on CMC (code for magnetic characters) |
| CN206399541U (en) * | 2016-12-30 | 2017-08-11 | 上海自动化仪表有限公司 | Intellectual Thermal Transmitter based on SHC16L |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026486A (en) * | 2023-01-29 | 2023-04-28 | 中国长江电力股份有限公司 | But human-computer interaction's multi-output temperature changer |
| CN116026486B (en) * | 2023-01-29 | 2024-03-12 | 中国长江电力股份有限公司 | But human-computer interaction's multi-output temperature changer |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170426 |