CN105203220A - Saturated vapor pressure constant temperature alarm device - Google Patents
Saturated vapor pressure constant temperature alarm device Download PDFInfo
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- CN105203220A CN105203220A CN201510714693.5A CN201510714693A CN105203220A CN 105203220 A CN105203220 A CN 105203220A CN 201510714693 A CN201510714693 A CN 201510714693A CN 105203220 A CN105203220 A CN 105203220A
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Abstract
The invention discloses a saturated vapor pressure constant temperature alarm device, and relates to a temperature measuring device. The saturated vapor pressure constant temperature alarm device consists of a high-precision temperature measuring module and a single chip microcomputer main control module, wherein the high-precision temperature measuring module and the single chip microcomputer main control module are in communication connection through Rs232 communication circuits; a single chip microcomputer control center I of the high-precision temperature measuring module is respectively connected with the high-precision temperature measuring module, the Rs232 communication circuit I and a memory circuit; a single chip microcomputer control center II of the single chip microcomputer main control module is respectively electrically connected with the Rs232 communication circuit II, a temperature display module, an alarm circuit and a temperature setting, alarm range arranging and storing module. The saturated vapor pressure constant temperature alarm device has the advantages that 1, the high-precision temperature measuring module can detect the lower limit of 0.001 DEG C, can realize the precision of the temperature value of 0.01 DEG C, and can be communicated with a computer for temperature correction; 2, temperature measurement, display and high-low temperature alarming can be realized.
Description
Technical field
The present invention relates to a kind of temperature measuring equipment of petrochemical industry, particularly relate to a kind of saturated vapor pressure constant temperature warning device.
Background technology
In modern industry production run, temperature is topmost parameter for production, and it is a physical quantity affecting product quality and product efficiency, especially at petroleum chemical industry, and the mensuration of saturated vapor pressure, the requirement of temperature is particularly important; Existing saturated vapour warning device, adopt common temperature measurement circuit, its operating voltage is unstable, estimating precision is inadequate, and then cause measurement result to fluctuate large, poor stability, once monitoring result occurs abnormal, the understanding of staff for the condition of production will be affected, if there is no the exception in Timeliness coverage production run, will production development accident, consequence is very serious.
Summary of the invention
The present invention, for above-mentioned the deficiencies in the prior art, provides a kind of saturated vapor pressure constant temperature warning device.
A kind of saturated vapor pressure constant temperature warning device of the present invention, be made up of high precision measuring temperature module and single-chip microcomputer main control module, high precision measuring temperature module is connected by the communication of Rs232 communicating circuit with single-chip microcomputer main control module, described high precision measuring temperature module is by high precision measuring temperature circuit, Single-chip Controlling center I, Rs232 communicating circuit I and memory circuit are formed, Single-chip Controlling center I respectively with high precision measuring temperature circuit, Rs232 communicating circuit I is connected with memory circuit circuit, described single-chip microcomputer main control module is by Single-chip Controlling center II, Rs232 communicating circuit II, temperature display module, warning circuit and temperature are arranged, alarm range is arranged and storage module is formed, Single-chip Controlling center II respectively with Rs232 communicating circuit II, temperature display module, warning circuit and temperature are arranged, alarm range is arranged and storage module circuit connects, described Rs232 communicating circuit I is connected with Rs232 communicating circuit II communication.
As a further improvement on the present invention, described high precision measuring temperature circuit is by platinum resistance temperature sensor socket circuit, constant-current source circuit, discharge circuit, reference voltage circuit and high-precision AD Acquisition Circuit are formed, the one end of platinum resistance temperature sensor socket CZ1 in platinum resistance temperature sensor socket circuit is connected with constant-current source circuit, its other end ground connection, constant-current source circuit is connected with reference voltage circuit circuit, and provide burning voltage by voltage stabilizing chip TL431, the voltage that constant-current source circuit is exported by stabilivolt is connected on resistance R1 one end, the other end of resistance R1 drives with triode 9013 and is connected, its output voltage is delivered to 3 pin of the operational amplifier OP07U3 of discharge circuit through resistance R3, signal after U3 amplifies is passed to AD Gather and input end 19 pin of AD acquisition chip TLC7135U2 by resistance R7, and the lower order filter be made up of resistance R7 and electric capacity C7 filters clutter.
As a further improvement on the present invention, the output terminal of described constant-current source circuit is connected to overvoltage crowbar.
As a further improvement on the present invention, described platinum resistance temperature sensor is PT100 or the PT1000 platinum resistance formula temperature sensor of 3 lines or 4 lines.
As a further improvement on the present invention, what described voltage stabilizing chip TL431 provided is 2.5V burning voltage.
A kind of saturated vapor pressure constant temperature warning device of the present invention, temperature value is detected by high precision measuring temperature module, and electric signal flows to single-chip microcomputer, single-chip microcomputer demonstrates temperature value, and judges temperature value whether within the scope of design temperature, by the contrast with setting value, carry out high temperature or low-temperature warning, its superiority is: the first, and high precision measuring temperature module can detect 0.001 DEG C of lowest temperature, the temperature value of 0.01 DEG C can be accurate to, and temperature correction can be carried out with computer communication; The second, the measurement of temperature, display and high/low temperature can be realized and report to the police.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the temperature measurement circuit figure of high precision measuring temperature module of the present invention;
Fig. 3 is the single chip circuit figure of high precision measuring temperature module of the present invention;
Fig. 4 is the memory circuit figure of high precision measuring temperature module of the present invention;
Fig. 5 is the communicating circuit figure of high precision measuring temperature module of the present invention.
Embodiment
As shown in Figure 1, a kind of saturated vapor pressure constant temperature warning device of the present invention, be made up of high precision measuring temperature module and single-chip microcomputer main control module, high precision measuring temperature module is connected by the communication of Rs232 communicating circuit with single-chip microcomputer main control module, described high precision measuring temperature module is by high precision measuring temperature circuit, Single-chip Controlling center I, Rs232 communicating circuit I and memory circuit are formed, Single-chip Controlling center I respectively with high precision measuring temperature circuit, Rs232 communicating circuit I is connected with memory circuit circuit, described single-chip microcomputer main control module is by Single-chip Controlling center II, Rs232 communicating circuit II, temperature display module, warning circuit and temperature are arranged, alarm range is arranged and storage module is formed, Single-chip Controlling center II respectively with Rs232 communicating circuit II, temperature display module, warning circuit and temperature are arranged, alarm range is arranged and storage module circuit connects, described Rs232 communicating circuit I is connected with Rs232 communicating circuit II communication, wherein AD Acquisition Circuit 6 is that high-precision AD acquisition chip is connected with single-chip microcomputer, high precision test circuit has RS232 communicating circuit 9 can be connected with computer (as Fig. 3 and Fig. 5), there is fixing communications protocol, so can be carried out the Supplements of thermometer by computer software, and its calibration factor is stored in storage chip 8 li (as Fig. 4).
As shown in Figure 2, described high precision measuring temperature circuit is by platinum resistance temperature sensor socket circuit 1, constant-current source circuit 2, overvoltage crowbar 3, discharge circuit 4, reference voltage circuit 5 and high-precision AD Acquisition Circuit 6 are formed, wherein platinum resistance temperature sensor is the PT100 platinum resistance formula temperature sensor of 4 lines, then platinum resistance and socket CZ1 1, 2, 3, 4 pin are connected, one end of the socket CZ1 of the platinum resistance temperature sensor in platinum resistance temperature sensor socket circuit 1 is the current output terminal of permanent circuit 2 far away, be connected with constant-current source circuit 2, its other end ground connection, changed by measuring voltage and measure platinum resistance resistance variation with temperature, thus draw temperature value, constant-current source circuit 2 is connected with reference voltage circuit 5 circuit and provides 2.5V burning voltage by voltage stabilizing chip TL431, if reference voltage has trickle change, so constant current source also has the change of homophase, and this change can cancel each other, and does not affect thermometric value, the output terminal of constant-current source circuit 2 is connected to overvoltage crowbar 3, prevents input voltage more than AD reference voltage, and the input voltage playing protection AD only surpasses, and does not crash, the voltage (2.5V) that constant-current source circuit 2 is exported by stabilivolt is connected on resistance R1 (2.5K Ω) one end, the other end of resistance R1 drives with triode 9013 and is connected, the electric current that node A place is flow through is always 1 milliampere, and the electric current flowing through platinum resistance so is also 1 milliampere, its output voltage is delivered to 3 pin of the operational amplifier OP07U3 of discharge circuit 4 through resistance R3, signal after operational amplifier OP07U3 amplifies is passed to AD Gather and input end 19 pin of AD acquisition chip TLC7135U2 by R7, and the lower order filter be made up of resistance R7 and electric capacity C7 filters clutter.
Claims (5)
1. a saturated vapor pressure constant temperature warning device, be made up of high precision measuring temperature module and single-chip microcomputer main control module, it is characterized in that high precision measuring temperature module is connected by the communication of Rs232 communicating circuit with single-chip microcomputer main control module, described high precision measuring temperature module is by high precision measuring temperature circuit, Single-chip Controlling center I, Rs232 communicating circuit I and memory circuit are formed, Single-chip Controlling center I respectively with high precision measuring temperature circuit, Rs232 communicating circuit I is connected with memory circuit circuit, described single-chip microcomputer main control module is by Single-chip Controlling center II, Rs232 communicating circuit II, temperature display module, warning circuit and temperature are arranged, alarm range is arranged and storage module is formed, Single-chip Controlling center II respectively with Rs232 communicating circuit II, temperature display module, warning circuit and temperature are arranged, alarm range is arranged and storage module circuit connects, described Rs232 communicating circuit I is connected with Rs232 communicating circuit II communication.
2. a kind of saturated vapor pressure constant temperature warning device as claimed in claim 1, it is characterized in that described high precision measuring temperature circuit is by platinum resistance temperature sensor socket circuit (1), constant-current source circuit (2), discharge circuit (4), reference voltage circuit (5) and high-precision AD Acquisition Circuit (6) are formed, the one end of platinum resistance temperature sensor socket CZ1 in platinum resistance temperature sensor socket circuit (1) is connected with constant-current source circuit (2), its other end ground connection, constant-current source circuit (2) is connected with reference voltage circuit (5) circuit, and provide burning voltage by voltage stabilizing chip TL431, the voltage that constant-current source circuit (2) is exported by stabilivolt is connected on resistance R1 one end, the other end of resistance R1 drives with triode 9013 and is connected, its output voltage is delivered to 3 pin of the operational amplifier U3 of discharge circuit (4) through resistance R3, signal after U3 amplifies is passed to AD Gather and input end 19 pin of AD acquisition chip U2 by resistance R7, and the lower order filter be made up of resistance R7 and electric capacity C7 filters clutter.
3. a kind of saturated vapor pressure constant temperature warning device as claimed in claim 2, is characterized in that the output terminal of constant-current source circuit (2) is connected to overvoltage crowbar (3).
4. a kind of saturated vapor pressure constant temperature warning device as claimed in claim 2, is characterized in that platinum resistance temperature sensor is PT100 or the PT1000 platinum resistance formula temperature sensor of 3 lines or 4 lines.
5. a kind of saturated vapor pressure constant temperature warning device as claimed in claim 2, what it is characterized in that voltage stabilizing chip TL431 provides is 2.5V burning voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510714693.5A CN105203220B (en) | 2015-10-29 | 2015-10-29 | A kind of saturated vapor pressure constant temperature warning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510714693.5A CN105203220B (en) | 2015-10-29 | 2015-10-29 | A kind of saturated vapor pressure constant temperature warning device |
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| CN105203220A true CN105203220A (en) | 2015-12-30 |
| CN105203220B CN105203220B (en) | 2018-03-06 |
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| CN201510714693.5A Active CN105203220B (en) | 2015-10-29 | 2015-10-29 | A kind of saturated vapor pressure constant temperature warning device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675162A (en) * | 2016-01-27 | 2016-06-15 | 系新电子技术（苏州）有限公司 | Multi-point temperature detection system |
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2015
- 2015-10-29 CN CN201510714693.5A patent/CN105203220B/en active Active
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| US3715288A (en) * | 1970-11-10 | 1973-02-06 | Sensors Inc | Method of fabricating film-type sensing structures |
| EP0446546A2 (en) * | 1989-12-19 | 1991-09-18 | Universite Des Sciences Et Technologies De Lille | Procedure and device making use of thermo-electric effects to measure a physical entity the variation of which is capable of modifying the thermophysical properties of a substance |
| CN202075059U (en) * | 2011-05-20 | 2011-12-14 | 济南大学 | Novel platinum resistor temperature measurement module |
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| CN202442810U (en) * | 2012-01-19 | 2012-09-19 | 东北石油大学秦皇岛分校 | Thermal resistor temperature measuring device |
| CN202928716U (en) * | 2012-12-14 | 2013-05-08 | 广西星宇智能电气有限公司 | High precision intelligent temperature measurement circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675162A (en) * | 2016-01-27 | 2016-06-15 | 系新电子技术（苏州）有限公司 | Multi-point temperature detection system |
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| CN105203220B (en) | 2018-03-06 |
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