CN106525262A - Diode temperature transmitter and transmission method thereof - Google Patents
Diode temperature transmitter and transmission method thereof Download PDFInfo
- Publication number
- CN106525262A CN106525262A CN201610896111.4A CN201610896111A CN106525262A CN 106525262 A CN106525262 A CN 106525262A CN 201610896111 A CN201610896111 A CN 201610896111A CN 106525262 A CN106525262 A CN 106525262A
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- China
- Prior art keywords
- diode
- adc
- transducer
- temperature transmitter
- primary processor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/01—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using semiconducting elements having PN junctions
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a diode temperature transmitter which is powered by a power supply and is connected with a diode sensor. The transmitter comprises a voltage reference module, an ADC module, a main processor, a storage device and a communication module. The transmitter converts an electric signal of the diode sensor into a digital signal and outputs the digital signal. In addition, the transmitter is used for the diode sensor, the function is single, the structure is simple, the size is small, the cost is low, and no cold end compensation is required.
Description
Technical field
The present invention relates to Low Temperature Measurement Techniques field, and in particular to a kind of diode temperature transmitter and its delivering method.
Background technology
At present, cryogenic technique is widely used in each side such as industrial and agricultural production, national defense construction, biomedicine and scientific research
Face.Temperature field involved by cryogenic technique is commonly defined as below 120K.In Cryo Refrigerator development process, refrigeration machine is cold
Head temperature and the key factor that refrigeration work consumption is measurement refrigeration machine performance, thus it is extremely strict for the measurement of temperature.
Existing temperature transmitter adopts thermocouple sensor or platinum sensor as temperature element, from thermometric unit
Part output signal is sent to transmitter module, through voltage regulation filtering, operation amplifier, gamma correction, V/I conversions, constant current and reversely
After the processing of circuit such as protection, the 4～20mA current signals with temperature line relationship are converted into, are connected on secondary meter, from
And show corresponding temperature.For the temperature transmitter with platinum sensor as temperature element, the standard of platinum resistance
Curve is minimum to 70K.With the reduction of temperature, temperature drift is more and more violent, it is impossible to meet use requirement, therefore below 70K
Cannot be used using transmitter during platinum resistor temperature measuring.Prior art can refer to the Chinese invention of Publication No. 104833438A
Patent《Temperature transmitter》.For the temperature transmitter with thermocouple sensor as temperature element, thermocouple using when to enter
Row real time correction, because the sliver of thermocouple can produce impact to output voltage in the environment for have the temperature difference.Different wire groups
Into node even tensile force all can produce impact to the display of temperature.When low temperature is measured, temperature transmitter needs to carry out cold end
Compensation, for the junction compensator of cold junction compensation, its structure is more complicated, can directly influence acquisition precision.Prior art can
With reference to the Chinese invention patent of Publication No. 102661814A《A kind of thermocouple temperature transmitter and implementation method》.
There are good concordance and repeatability during diode-transducer measurement low temperature, as shown in Figure 1 to Figure 2.Its non-demarcation
The minimum temperature that can measure 1.4K of standard curve.But, currently without with the matching used temperature of diode-transducer
Transmitter.During using diode-transducer as temperature element, need to export temperature element using general data collecting instrument
Signal processed.General data collecting instrument, which is included for connecting multiple detecting instruments and realizing data acquisition
It is RS232 and RS485 serial ports, the USB interface for data output, the RJ45 interfaces for connecing netting twine, defeated for video frequency output and audio frequency
Go out VGA structures, the WIFI module for live networking, data space, touch screen etc..It follows that general data
Acquisition Instrument has several functions.But which has the disadvantage：Volume is big, needs enough installing spaces；Complex structure, high cost.
Generally speaking, the temperature transmitter for being used for low-temperature measurement in prior art can not meet use requirement.What which was present
Shortcoming：First, pick-up is unable to less than 70K as the temperature transmitter of temperature element using thermocouple sensor or platinum sensor
Following temperature value；Second, need to carry out cold junction compensation using thermocouple sensor as the temperature transmitter of temperature element, so as to
Directly influence acquisition precision；3rd, the function complexity of general data collecting instrument, high cost, volume are big.
The content of the invention
The present invention is made improvements for existing technical problem, i.e., the technical problem to be solved is to provide one kind
The signal of telecommunication of diode-transducer is transformed into digital signal and is exported by diode temperature transmitter, the transmitter, the transmitter
Simple structure, small volume, low cost, cold junction compensation need not be carried out.For solving the above problems, the technical side that the present invention is provided
Case is：
A kind of diode temperature transmitter, which passes through power supply and powers and connect diode-transducer, and the transmitter includes electricity
Pressure base modules, ADC, primary processor, memorizer and communication module；
The voltage reference module is high precision electro potential source, for providing reference voltage；
The ADC connection voltage reference module gathers the voltage signal of diode-transducer simultaneously, and the signal of telecommunication is turned
Become digital signal；
The primary processor connects the ADC, and calculation process, the task scheduling for completing all data is defeated with control
Go out；
The memorizer connects primary processor, for storing data in calculating process；
The communication module connects the primary processor, for the data of primary processor are transmitted and are exported.
Further, also including constant current source module, the constant current source module connects the diode-transducer, for providing two
Constant current during pole pipe working sensor.
Further, the ADC is the A/D converter of 16 precision.
Further, the ADC adopts four-wire system single channel or two-wire system with the interface of the diode-transducer
Dual pathways form.
Further, the diode-transducer is silicon diode sensor.
In above-mentioned technical proposal, using diode-transducer as temperature element, by described diode temperature pick-up
The signal of telecommunication of the diode-transducer is transformed into digital signal and is exported by device.It is special according to the electricity that diode-transducer measures low temperature
Property understand, the minimum temperature value that can collect 1.4K of described diode temperature transmitter.Meanwhile, described diode temperature
Transmitter functions are single, simple structure, small volume, need not carry out cold junction compensation, it is to avoid cold junction compensation is to acquisition precision
Affect.Further, the ADC adopts four-wire system single channel or two-wire system bilateral with the interface of the diode-transducer
Road form.Can be selected according to different use requirements.Sensed by the A/D converter and silicon diode that there are 16 precision
The selection of device, further improves acquisition precision.
Another technical problem to be solved by this invention is to provide a kind of delivering method of diode temperature transmitter, bag
Include following steps：
Step one：The reference voltage letter of the signal of telecommunication of the ADC collection diode-transducer and voltage reference module
Number；
Step 2：The signal of telecommunication is transformed into digital quantity by the ADC；
Step 3：The primary processor carries out computing to the digital quantity and obtains operation result, the phase in calculating process
Data are closed by the memory storage；
Step 4：The operation result is exported by communication module.
The device have the advantages that：
1. diode temperature transmitter of the present invention is using diode-transducer as temperature element, by the temperature element
The signal of telecommunication be transformed into digital signal and export.
2. diode temperature transmitter of the present invention is high to the acquisition precision of temperature value.
3. diode temperature transmitter of the present invention, which is directed to diode-transducer use, single function, structure letter
List, small volume, cold junction compensation need not be carried out.
Description of the drawings
Temperature-voltage curves of the Fig. 1 for diode sensor.
Temperature-sensitivity curves of the Fig. 2 for diode sensor.
Fig. 3 is the functional schematic of the present invention.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention will be further described.
As shown in figure 3, the specific embodiment of the present invention, a kind of diode temperature transmitter, which passes through power supply and powers simultaneously
Connection diode-transducer.The transmitter include voltage reference module, ADC, primary processor, memorizer, communication module and
Constant current source module.
The diode-transducer is silicon diode sensor.
The voltage reference module is high precision electro potential source, for providing reference voltage.
The ADC connection voltage reference module gathers the voltage signal of diode-transducer simultaneously, and the signal of telecommunication is turned
Become digital signal.The ADC is the A/D converter of 16 precision.
The primary processor connects the ADC, and calculation process, the task scheduling for completing all data is defeated with control
Go out.
The memorizer connects primary processor, for storing data in calculating process.
The communication module, connects the primary processor, for the data of primary processor are transmitted and are exported.
The constant current source module connects the diode-transducer, for providing constant electricity when diode-transducer works
Stream.
The present invention also provides a kind of delivering method of diode temperature transmitter, comprises the following steps：
Step one：The reference voltage letter of the signal of telecommunication of the ADC collection diode-transducer and voltage reference module
Number；
Step 2：The signal of telecommunication is transformed into digital quantity by the ADC；
Step 3：The primary processor carries out computing to the digital quantity and obtains operation result, the phase in calculating process
Data are closed by the memory storage；
Step 4：The operation result is exported by communication module.
The characteristics of present embodiment：
1. the diode temperature transmitter described in present embodiment is using diode-transducer as temperature element, by the thermometric
The signal of telecommunication of element is transformed into digital signal and exports.Experiment shows that the diode temperature transmitter temperatures pick-up scope is
1.4K～500K.It follows that the minimum 1.4K of the temperature value of its pick-up.
2. the diode temperature transmitter described in present embodiment, which is directed to diode-transducer use, single function, knot
Structure is simple, small volume, low cost, need not carry out cold junction compensation.
3. the diode temperature transmitter described in present embodiment is high to the acquisition precision of temperature value.
Above-mentioned all of embodiment only for illustrating the principle of the present invention, is not limited to the scope of the present invention.To this
Bright to make other changes, these changes are still within the scope of the present invention.
Claims (6)
1. a kind of diode temperature transmitter, which passes through power supply and powers and connect diode-transducer, it is characterised in that the pick-up
Device includes voltage reference module, ADC, primary processor, memorizer and communication module；
The voltage reference module is high precision electro potential source, for providing reference voltage；
The ADC connection voltage reference module gathers the voltage signal of diode-transducer simultaneously, and the signal of telecommunication is transformed into
Digital signal；
The primary processor connects the ADC, completes calculation process, task scheduling and the controlled output of all data；
The memorizer connects primary processor, for storing data in calculating process；
The communication module connects the primary processor, for the data of primary processor are transmitted and are exported.
2. diode temperature transmitter as claimed in claim 1, it is characterised in that also including constant current source module, the constant current
Source module connects the diode-transducer, for providing constant current when diode-transducer works.
3. diode temperature transmitter as claimed in claim 1 or 2, it is characterised in that the ADC is 16 precision
A/D converter.
4. diode temperature transmitter as claimed in claim 1 or 2, it is characterised in that the ADC and the diode
The interface of sensor adopts four-wire system single channel or two-wire system dual pathways form.
5. diode temperature transmitter as claimed in claim 1 or 2, it is characterised in that the diode-transducer is silicon two
Pole pipe sensor.
6. the delivering method of the diode temperature transmitter described in a kind of claim 1, it is characterised in that comprise the following steps：
Step one：The reference voltage signal of the signal of telecommunication of the ADC collection diode-transducer and voltage reference module；
Step 2：The signal of telecommunication is transformed into digital quantity by the ADC；
Step 3：The primary processor carries out computing to the digital quantity and obtains operation result, the dependency number in calculating process
According to by the memory storage；
Step 4：The operation result is exported by communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610896111.4A CN106525262A (en) | 2016-10-13 | 2016-10-13 | Diode temperature transmitter and transmission method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610896111.4A CN106525262A (en) | 2016-10-13 | 2016-10-13 | Diode temperature transmitter and transmission method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106525262A true CN106525262A (en) | 2017-03-22 |
Family
ID=58332077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610896111.4A Pending CN106525262A (en) | 2016-10-13 | 2016-10-13 | Diode temperature transmitter and transmission method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765982A (en) * | 2020-06-16 | 2020-10-13 | 中国电子科技集团公司第四十四研究所 | High-precision temperature measurement control circuit |
| CN111780881A (en) * | 2020-06-16 | 2020-10-16 | 中国电子科技集团公司第四十四研究所 | High-precision temperature measurement system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203007U (en) * | 1987-03-02 | 1988-05-18 | 吴英怀 | Temp. transfer device |
| CN101514925A (en) * | 2008-02-18 | 2009-08-26 | 精工电子有限公司 | Temperature detection circuit |
| DE102010038894B4 (en) * | 2010-08-04 | 2014-12-24 | Siemens Aktiengesellschaft | Measuring system, circuit breaker and method |
| CN204373797U (en) * | 2014-12-25 | 2015-06-03 | 西南交通大学 | A kind of silicon diode temperature metering circuit |
-
2016
- 2016-10-13 CN CN201610896111.4A patent/CN106525262A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203007U (en) * | 1987-03-02 | 1988-05-18 | 吴英怀 | Temp. transfer device |
| CN101514925A (en) * | 2008-02-18 | 2009-08-26 | 精工电子有限公司 | Temperature detection circuit |
| DE102010038894B4 (en) * | 2010-08-04 | 2014-12-24 | Siemens Aktiengesellschaft | Measuring system, circuit breaker and method |
| CN204373797U (en) * | 2014-12-25 | 2015-06-03 | 西南交通大学 | A kind of silicon diode temperature metering circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765982A (en) * | 2020-06-16 | 2020-10-13 | 中国电子科技集团公司第四十四研究所 | High-precision temperature measurement control circuit |
| CN111780881A (en) * | 2020-06-16 | 2020-10-16 | 中国电子科技集团公司第四十四研究所 | High-precision temperature measurement system |
| CN111780881B (en) * | 2020-06-16 | 2021-11-16 | 中国电子科技集团公司第四十四研究所 | High-precision temperature measurement system |
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Application publication date: 20170322 |