CN105203220B - A kind of saturated vapor pressure constant temperature warning device - Google Patents
A kind of saturated vapor pressure constant temperature warning device Download PDFInfo
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- CN105203220B CN105203220B CN201510714693.5A CN201510714693A CN105203220B CN 105203220 B CN105203220 B CN 105203220B CN 201510714693 A CN201510714693 A CN 201510714693A CN 105203220 B CN105203220 B CN 105203220B
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Abstract
A kind of saturated vapor pressure constant temperature warning device of the present invention, it is related to a kind of temperature measuring equipment, it is to be made up of high precision measuring temperature module and single-chip microcomputer main control module, high precision measuring temperature module is communicated by Rs232 communicating circuits with single-chip microcomputer main control module and connected, the single-chip microcomputer control centre I of described high precision measuring temperature module respectively with high precision measuring temperature circuit, Rs232 communicating circuits I connect with storage circuit circuit, the single-chip microcomputer control centre II of described single-chip microcomputer main control module respectively with Rs232 communicating circuits II, temperature display module, warning circuit and temperature setting, alarm range is set and the connection of storage module circuit.The present invention is advantageous in that：First, high precision measuring temperature module can detect 0.001 DEG C of lowest temperature, can be accurate to 0.01 DEG C of temperature value, and can carry out temperature correction with computer communication；Second, measurement, display and the high/low temperature alarm of temperature can be realized.
Description
Technical field
The present invention relates to a kind of temperature measuring equipment of petrochemical industry, more particularly to a kind of saturated vapor pressure constant temperature alarm dress
Put.
Background technology
During modern industrial production, temperature is most important parameter for production, and it is an influence product
The physical quantity of quality and product efficiency, it is especially particularly heavy in petroleum chemical industry, the measure of saturated vapor pressure, the requirement of temperature
Will；Existing saturated vapor warning device, using common temperature measurement circuit, its operating voltage is unstable, measurement accuracy is inadequate, and then
Causing measurement result to fluctuate, big, stability is poor, once exception occurs in monitoring result, will influence staff for the condition of production
Understanding, if without the exception found in time in production process, will production development accident, consequence is extremely serious.
The content of the invention
The present invention is for above-mentioned the deficiencies in the prior art, there is provided a kind of saturated vapor pressure constant temperature warning device.
A kind of saturated vapor pressure constant temperature warning device of the present invention, is by high precision measuring temperature module and single-chip microcomputer main control module
Form, high precision measuring temperature module is communicated by Rs232 communicating circuits with single-chip microcomputer main control module and connected, described high precision measuring temperature
Module is made up of high precision measuring temperature circuit, single-chip microcomputer control centre I, Rs232 communicating circuits I and storage circuit, single-chip microcomputer control
Center I processed is connected with high precision measuring temperature circuit, Rs232 communicating circuits I and storage circuit circuit respectively, described single-chip microcomputer master control
Module is by single-chip microcomputer control centre II, Rs232 communicating circuits II, temperature display module, warning circuit and temperature setting, alarm
Scope set and storage module form, single-chip microcomputer control centre II respectively with Rs232 communicating circuits II, temperature display module, report
Alert circuit is set with temperature setting, alarm range and storage module circuit connects, and described Rs232 communicating circuits I and Rs232 leads to
Interrogate the communication connection of circuit II.
As a further improvement on the present invention, described high precision measuring temperature circuit is by platinum resistance temperature sensor socket electricity
Road, constant-current source circuit, discharge circuit, reference voltage circuit and high-precision AD Acquisition Circuit are formed, and platinum resistance temperature sensor is inserted
One end of platinum resistance temperature sensor socket CZ1 in seat circuit is connected with constant-current source circuit, its other end ground connection, constant-current source electricity
Road is connected with reference voltage circuit circuit and provides burning voltage by voltage stabilizing chip TL431, and constant-current source circuit is exported by voltage-stabiliser tube
Voltage be connected on resistance R1 one end, resistance the R1 other end and the drive connection of triode 9013, its output voltage pass through resistance R3
The operational amplifier OP07 U3 of discharge circuit 3 pin are delivered to, the signal after U3 amplifies passes to AD collection cores by resistance R7
The piece TLC7135 U2 AD collection pin of input 19, and clutter is filtered by resistance R7 and electric capacity the C7 lower order filter formed.
As a further improvement on the present invention, the output end of described constant-current source circuit is connected to overvoltage crowbar.
As a further improvement on the present invention, described platinum resistance temperature sensor be 3 lines or 4 lines PT100 or
PT1000 RTD formula temperature sensors.
As a further improvement on the present invention, described voltage stabilizing chip TL431 provided for 2.5V burning voltages.
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 is conveyed to single-chip microcomputer, and single-chip microcomputer shows temperature value, and judges temperature value whether in the range of design temperature, by with
The contrast of setting value, high temperature or low-temperature warning are carried out, it is advantageous in that：First, high precision measuring temperature module can detect 0.001
DEG C lowest temperature, 0.01 DEG C of temperature value can be accurate to, and temperature correction can be carried out with computer communication；Second, can
Realize measurement, display and the high/low temperature alarm of temperature.
Brief description of the drawings
Fig. 1 is schematic structural view of the 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 storage 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, is by high precision measuring temperature module and monolithic
Owner controls module composition, and high precision measuring temperature module is communicated by Rs232 communicating circuits with single-chip microcomputer main control module and connected, described
High precision measuring temperature module is by high precision measuring temperature circuit, single-chip microcomputer control centre I, Rs232 communicating circuits I and storage circuit structure
Into single-chip microcomputer control centre I is connected with high precision measuring temperature circuit, Rs232 communicating circuits I and storage circuit circuit respectively, described
Single-chip microcomputer main control module be by single-chip microcomputer control centre II, Rs232 communicating circuits II, temperature display module, warning circuit and
Temperature setting, alarm range set and storage module form, single-chip microcomputer control centre II respectively with Rs232 communicating circuits II, temperature
Degree display module, warning circuit and temperature setting, alarm range are set and storage module circuit connects, described Rs232 communications
Circuit I connects with the communication of Rs232 communicating circuits II；Wherein AD Acquisition Circuit 6 is high-precision AD acquisition chip and single-chip microcomputer
It is connected, high precision test circuit there are RS232 communicating circuits to be connected with computer（Such as Fig. 3 and Fig. 5）, there is fixed communication association
View, then the Supplements of thermometer can be carried out by computer software；And its calibration factor is stored in storage chip（Such as
Fig. 4）.
As shown in Fig. 2 described high precision measuring temperature circuit is by platinum resistance temperature sensor socket circuit 1, constant-current source electricity
Road 2, overvoltage crowbar 3, discharge circuit 4, reference voltage circuit 5 and high-precision AD Acquisition Circuit 6 are formed, wherein RTD temperature
The PT100 RTD formula temperature sensors that sensor is 4 lines are spent, then RTD is connected with socket CZ1 1,2,3,4 pin, platinum
The socket CZ1 of platinum resistance temperature sensor in RTD socket circuit 1 one end is the electricity of constant-current source circuit 2
Flow output end, be connected with constant-current source circuit 2, its other end ground connection, RTD resistance is measured with temperature by measuring voltage change
The change of degree, so as to draw temperature value；Constant-current source circuit 2 is connected with the circuit of reference voltage circuit 5 and by voltage stabilizing chip TL431
2.5V burning voltages are provided, if reference voltage has trickle change, then constant-current source also has the change of same phase, this change
It can cancel each other, not influence thermometric value；The output end of constant-current source circuit 2 is connected to overvoltage crowbar 3, prevents input voltage from surpassing
AD reference voltages are crossed, the input voltage for playing protection AD only surpasses, and does not crash；The voltage that constant-current source circuit 2 is exported by voltage-stabiliser tube
（2.5V）It is connected on resistance R1 (2.5K Ω) one end, resistance the R1 other end and the drive connection of triode 9013 so that flowed at node A
The electric current crossed is always 1 milliampere, and the electric current for so flowing through RTD is also 1 milliampere；Its output voltage is delivered to fortune through resistance R3
The operational amplifier OP07 U3 on electric discharge road 43 pin, the signal after operational amplifier OP07 U3 amplifications pass to AD by R7 and adopted
Collect the chip TLC7135 U2 AD collection pin of input 19, and filtered by resistance R7 and electric capacity the C7 lower order filter formed miscellaneous
Ripple.
Claims (4)
1. a kind of saturated vapor pressure constant temperature warning device, being made up of high precision measuring temperature module and single-chip microcomputer main control module, it is special
Sign is that high precision measuring temperature module communicates connection, described high accuracy survey with single-chip microcomputer main control module by Rs232 communicating circuits
Warm module is made up of high precision measuring temperature circuit, single-chip microcomputer control centre I, Rs232 communicating circuits I and storage circuit, single-chip microcomputer
Control centre I is connected with high precision measuring temperature circuit, Rs232 communicating circuits I and storage circuit circuit respectively, described monolithic owner
It is by single-chip microcomputer control centre II, Rs232 communicating circuits II, temperature display module, warning circuit and temperature setting, report to control module
Alert scope is set and storage module is formed, single-chip microcomputer control centre II respectively with Rs232 communicating circuits II, temperature display module,
Warning circuit is set with temperature setting, alarm range and storage module circuit connects, described Rs232 communicating circuits I and Rs232
The communication connection of communicating circuit II；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）With high-precision AD Acquisition Circuit（6）Form, platinum resistance temperature sensor
Socket circuit（1）In platinum resistance temperature sensor socket CZ1 one end and constant-current source circuit（2）It is connected, its other end ground connection,
Constant-current source circuit（2）With reference voltage circuit（5）Circuit connects and provides burning voltage, constant-current source electricity by voltage stabilizing chip TL431
Road（2）The voltage exported by voltage-stabiliser tube is connected on resistance R1 one end, and resistance the R1 other end and the drive connection of triode 9013, its is defeated
Go out voltage and be delivered to discharge circuit through resistance R3（4）Operational amplifier U3 3 pin, the signal after U3 amplifies is by resistance R7
The AD acquisition chips U2 AD collection pin of input 19 are passed to, and are filtered by resistance R7 and electric capacity the C7 lower order filter formed miscellaneous
Ripple.
A kind of 2. saturated vapor pressure constant temperature warning device as claimed in claim 1, it is characterised in that constant-current source circuit（2）It is defeated
Go out end and be connected to overvoltage crowbar（3）.
A kind of 3. saturated vapor pressure constant temperature warning device as claimed in claim 1, it is characterised in that platinum resistance temperature sensor
For 3 lines or PT100 the or PT1000 RTD formula temperature sensors of 4 lines.
4. a kind of saturated vapor pressure constant temperature warning device as claimed in claim 1, it is characterised in that voltage stabilizing chip TL431 is carried
Supply for 2.5V burning voltages.
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| CN201510714693.5A CN105203220B (en) | 2015-10-29 | 2015-10-29 | A kind of saturated vapor pressure constant temperature warning device |
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| 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 CN105203220A (en) | 2015-12-30 |
| CN105203220B true CN105203220B (en) | 2018-03-06 |
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| 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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| US3715288A (en) * | 1970-11-10 | 1973-02-06 | Sensors Inc | Method of fabricating film-type sensing structures |
| EP0446546A3 (en) * | 1989-12-19 | 1991-10-02 | Universite Des Sciences Et Techniques De Lille Flandres-Artois (Lille I) | 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 |
| CN202066609U (en) * | 2011-05-24 | 2011-12-07 | 济南大学 | Combined intelligent temperature polling device |
| 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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