CN102435339B - Platinum (PT) 100 temperature acquisition module of electric cabinet - Google Patents
Platinum (PT) 100 temperature acquisition module of electric cabinet Download PDFInfo
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- CN102435339B CN102435339B CN 201110282024 CN201110282024A CN102435339B CN 102435339 B CN102435339 B CN 102435339B CN 201110282024 CN201110282024 CN 201110282024 CN 201110282024 A CN201110282024 A CN 201110282024A CN 102435339 B CN102435339 B CN 102435339B
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Abstract
The invention discloses a platinum (PT) 100 temperature acquisition module of an electric cabinet. The PT 100 temperature sensor comprises a multi-path PT 100 temperature sensor, an amplifying circuit, a singlechip microcomputer and a communication circuit, wherein the multi-path PT 100 temperature sensor is used for acquiring the temperatures of the corresponding acquisition points on the electric cabinet and outputting the corresponding temperature signal; the amplifying circuit is used for amplifying the temperature signal to output; the singlechip microcomputer is used for carrying out the analog-to-digital conversion on the temperature signal which is output by the amplifying circuit, and outputting the digitized temperature signal; and the communication circuit is used for transferring the digitized temperature signal which is output by the singlechip microcomputer to a core control unit of the electric cabinet, accordingly, the PT100 temperature acquisition module of the electric cabinet is formed by the circuit with low cost, so the temperature acquisition cost of the electric cabinet is lowered.
Description
Technical field
The present invention relates to a kind of temperature collect module, relate in particular to a kind of PT100 temperature collect module of electric cabinet.
Background technology
Electric cabinet is to comprise equipment such as one or more low voltage switch equipments and associated control, measurement, signal, protection, adjusting; and be responsible for intactly fitting together with structure member by manufacturing firm, finish an assembly of the electric and mechanical connection of all inside.Because a lot of element devices need carry out the multi-point temp collection to electric cabinet to responsive to temperature, and the key control unit (as PLC) that the data that collect are input to electric cabinet handled, in order to monitor in real time.
At present, the analog quantity load module that the temperature collect module of electric cabinet mostly adopts temperature sensor to add on the PLC of electric cabinet realizes, yet, the analog quantity load module on the PLC expensive, this just causes the temperature acquisition cost of electric cabinet very high.
Summary of the invention
The object of the present invention is to provide a kind of PT100 temperature collect module of electric cabinet, reduce the temperature acquisition cost of electric cabinet.
For achieving the above object, the invention provides a kind of PT100 temperature collect module of electric cabinet, comprising:
Multichannel PT100 temperature sensor is used for gathering temperature and the corresponding temperature signal of output of corresponding collection point on the electric cabinet;
Amplifying circuit is used for described temperature signal is amplified the output of processing back;
Single-chip microcomputer is used for the temperature signal of described amplifying circuit output is carried out analog to digital conversion, exports digitized temperature signal;
Communicating circuit is used for sending the digitized temperature signal of described single-chip microcomputer output to the electric cabinet key control unit.
The PT100 temperature collect module of electric cabinet of the present invention also comprises:
Calibration circuit is used in advance described PT100 temperature sensor being calibrated before use, and the temperature signal with described PT100 temperature sensor output is sent to described amplifying circuit in use.
The PT100 temperature collect module of electric cabinet of the present invention, described PT100 temperature sensor is 8 the tunnel, and described amplifying circuit comprises operational amplifier and the peripheral circuit thereof that two models are TCL2254, and each described operational amplifier is handled four road temperature signals.
The PT100 temperature collect module of electric cabinet of the present invention, described single-chip microcomputer comprise that model is single-chip microcomputer and the peripheral circuit thereof of C8051F410.
The PT100 temperature collect module of electric cabinet of the present invention, described communicating circuit comprises the MAX485 communication module, described model be C8051F410 single-chip microcomputer the 21st with the 22nd pin the 4th being connected with the 1st pin of corresponding and described MAX485 communication module respectively, described model is the 2nd being connected with the 3rd pin of the 24th pin and described MAX485 communication module of the single-chip microcomputer of C8051F410.
The PT100 temperature collect module of electric cabinet of the present invention, described calibration point road is 8 the tunnel, described calibration point road, every road comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, first variable resistor, the second adjustable resistance, voltage stabilizing diode, diode, first electric capacity, second electric capacity and the 3rd electric capacity, wherein, one end of first resistance, one end of second resistance and an end of first electric capacity link together as the signal input part of PT100 temperature sensor, the other end of first resistance is connected with a signal input part of described operational amplifier as the first amplifier input end, another termination+5V of second resistance, the other end ground connection of first electric capacity, one termination of the 3rd resistance+5V, one end of the other end of the 3rd resistance and the 4th resistance is connected with the output terminal of voltage stabilizing diode, the input end grounding of voltage stabilizing diode, one end of the 5th resistance, one end of the 6th resistance links together with an end of second electric capacity and is connected with another signal input part of described operational amplifier as the second amplifier input end, the other end of the 4th resistance, one end of the other end of the 5th resistance and the second adjustable resistance links together, the other end ground connection of the second adjustable resistance, the other end of the 6th resistance is connected with first a variable-resistance end, the other end of second electric capacity, one end of the first variable-resistance other end and the 7th resistance links together and is connected with the signal output part of described operational amplifier, the other end of the 7th resistance, it is that a signal input part of the single-chip microcomputer of C8051F410 is connected the other end of second electric capacity and the input end grounding of diode that one end of second electric capacity and the output terminal of diode link together with described model.
The PT100 temperature collect module of electric cabinet of the present invention comprises that also with described model be the multi-way switch amount output circuit that the signal output part of the single-chip microcomputer of C8051F410 is connected, and is used for realizing output control.
The PT100 temperature collect module of electric cabinet of the present invention, described multi-way switch amount output circuit is 3 the tunnel, comprise the 8th resistance, the 9th resistance, the tenth resistance, first triode, second triode and the 3rd triode, wherein, model be C8051F410 single-chip microcomputer the 19th, the the 19th and the 23rd pin is corresponding to the 8th resistance respectively, the base stage of the 9th resistance and the tenth resistance and described first triode, the base stage of second triode is connected with the base stage of the 3rd triode, the collector of first triode, the collector of the collector of second triode and the 3rd triode is as the control output end.
The PT100 temperature collect module of electric cabinet of the present invention comprises multichannel PT100 temperature sensor, is used for gathering temperature and the corresponding temperature signal of output of corresponding collection point on the electric cabinet; Amplifying circuit is used for temperature signal is amplified the output of processing back; Single-chip microcomputer is used for the temperature signal of amplifying circuit output is carried out analog to digital conversion, exports digitized temperature signal; Communicating circuit is used for sending the digitized temperature signal of single-chip microcomputer output to the electric cabinet key control unit, thereby has constituted the PT100 temperature collect module of electric cabinet with above-mentioned cheap circuit, therefore, has reduced the temperature acquisition cost of electric cabinet.
Description of drawings
Fig. 1 is the circuit block diagram of the PT100 temperature collect module of electric cabinet of the present invention;
Fig. 2 is the circuit theory diagrams of multichannel calibration circuit portion of the PT100 temperature collect module of electric cabinet among Fig. 1;
Fig. 3 is the circuit theory diagrams of amplification circuits of the PT100 temperature collect module of electric cabinet among Fig. 1;
Fig. 4 is the circuit theory diagrams of single chip part of the PT100 temperature collect module of electric cabinet among Fig. 1;
Fig. 5 is the circuit theory diagrams of multi-way switch amount output circuit part of the PT100 temperature collect module of electric cabinet among Fig. 1;
Fig. 6 is the communicating circuit circuit theory diagrams partly of the PT100 temperature collect module of electric cabinet among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail:
With reference to shown in Figure 1, the PT100 temperature collect module of the electric cabinet of present embodiment comprises that multichannel PT100 temperature sensor is used for gathering temperature and the corresponding temperature signal of output of corresponding collection point on the electric cabinet; Amplifying circuit is used for temperature signal is amplified the output of processing back; Single-chip microcomputer is used for the temperature signal of amplifying circuit output is carried out analog to digital conversion, exports digitized temperature signal; Communicating circuit is used for sending the digitized temperature signal of single-chip microcomputer output to the electric cabinet key control unit, handles for the electric cabinet key control unit; The multichannel calibration circuit is used in advance the PT100 temperature sensor being calibrated before use, and the temperature signal with the output of PT100 temperature sensor is sent to amplifying circuit in use; And the multi-way switch amount output circuit that is connected with the signal output part of single-chip microcomputer, be used for realizing output control, generally multi-way switch amount output circuit is as standby, when control object is few and fairly simple, single-chip microcomputer can directly be realized input and output control, handles and needn't send the electric cabinet key control unit to.
Extremely shown in Figure 6 in conjunction with Fig. 2, single-chip microcomputer is that model is single-chip microcomputer and the peripheral circuit thereof of C8051F410, the PT100 temperature sensor is 8 tunnel (not drawing among the figure), multichannel calibration point road is specially 8 the tunnel, amplifying circuit comprises operational amplifier and the peripheral circuit thereof that two models are TCL2254, each operational amplifier is handled four road temperature signals, and communicating circuit comprises the MAX485 communication module, wherein:
Calibration point road, every road comprises first resistance (as R15), second resistance (as R16), the 3rd resistance (as R19), the 4th resistance (as R20), the 5th resistance (as R17), the 6th resistance (as R18), the 7th resistance (as R21), first variable resistor (as VR6), the second adjustable resistance (as VR5), voltage stabilizing diode (as Z5), diode (as Z6), first electric capacity (as C7), second electric capacity (as C8) and the 3rd electric capacity (as C9), wherein, one end of first resistance, one end of second resistance and an end of first electric capacity link together as the signal input part (as PT1+) of PT100 temperature sensor, the other end of first resistance is connected with a signal input part of operational amplifier as the first amplifier input end, another termination+5V of second resistance, the other end ground connection of first electric capacity, one termination of the 3rd resistance+5V, one end of the other end of the 3rd resistance and the 4th resistance is connected with the output terminal of voltage stabilizing diode, the input end grounding of voltage stabilizing diode, one end of the 5th resistance, one end of the 6th resistance links together with an end of second electric capacity and is connected with another signal input part of operational amplifier as the second amplifier input end, the other end of the 4th resistance, one end of the other end of the 5th resistance and the second adjustable resistance links together, the other end ground connection of the second adjustable resistance, the other end of the 6th resistance is connected with first a variable-resistance end, the other end of second electric capacity, one end of the first variable-resistance other end and the 7th resistance links together and is connected with the signal output part of operational amplifier, the other end of the 7th resistance, it is that a signal input part of the single-chip microcomputer of C8051F410 is connected the other end of second electric capacity and the input end grounding of diode that one end of second electric capacity and the output terminal of diode link together with model.
Model be C8051F410 single-chip microcomputer the 21st with the 22nd pin the 4th being connected with the 1st pin of corresponding and MAX485 communication module respectively, model is the 2nd being connected with the 3rd pin of the 24th pin and MAX485 communication module of the single-chip microcomputer of C8051F410, realizes communication with host computer (being the electric cabinet key control unit) by the MAX485 communication module.
Multi-way switch amount output circuit is 3 the tunnel, comprise resistance R 59, resistance R 60, resistance R 61, triode T1, triode T2 and triode T3, wherein, model is the 19th, the 19th being connected with the base stage of triode T1, the base stage of triode T2 and the base stage of triode T3 by resistance R 59, resistance R 60 and resistance R 61 with the 23rd pin is respectively corresponding of single-chip microcomputer of C8051F410, and the collector of the collector of triode T1, triode T2 and the collector of triode T3 are as the control output end.
Above embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (4)
1. the PT100 temperature collect module of an electric cabinet is characterized in that, comprising:
Multichannel PT100 temperature sensor is used for gathering temperature and the corresponding temperature signal of output of corresponding collection point on the electric cabinet;
Amplifying circuit is used for described temperature signal is amplified the output of processing back;
Single-chip microcomputer is used for the temperature signal of described amplifying circuit output is carried out analog to digital conversion, exports digitized temperature signal;
Communicating circuit is used for sending the digitized temperature signal of described single-chip microcomputer output to the electric cabinet key control unit;
Calibration circuit is used in advance described PT100 temperature sensor being calibrated before use, and the temperature signal with described PT100 temperature sensor output is sent to described amplifying circuit in use, wherein:
Described PT100 temperature sensor is 8 the tunnel, and described amplifying circuit comprises operational amplifier and the peripheral circuit thereof that two models are TCL2254, and each described operational amplifier is handled four road temperature signals;
The model of described single-chip microcomputer is C8051F410, and described temperature collect module also comprises the SCM peripheral circuit;
Described calibration circuit is 8 the tunnel, the described calibration circuit in every road comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, first variable resistor, the second adjustable resistance, voltage stabilizing diode, diode, first electric capacity, second electric capacity and the 3rd electric capacity, wherein, one end of first resistance, one end of second resistance and an end of first electric capacity link together as the signal input part of PT100 temperature sensor, the other end of first resistance is connected with the wherein in-phase input end of one group of amplifier unit of one of them operational amplifier, another termination+5V of second resistance, the other end ground connection of first electric capacity, one termination of the 3rd resistance+5V, one end of the other end of the 3rd resistance and the 4th resistance is connected with the negative pole of voltage stabilizing diode, the plus earth of voltage stabilizing diode, one end of the 5th resistance, one end of the 6th resistance links together with an end of second electric capacity and is connected with the inverting input of this group amplifier unit, the other end of the 4th resistance, one end of the other end of the 5th resistance and the second adjustable resistance links together, the other end ground connection of the second adjustable resistance, the other end of the 6th resistance is connected with first a variable-resistance end, the other end of second electric capacity, one end of the first variable-resistance other end and the 7th resistance links together and is connected with the output terminal of this group amplifier unit, the other end of the 7th resistance, it is that a signal input part of the single-chip microcomputer of C8051F410 is connected the other end of the 3rd electric capacity and the plus earth of diode that one end of the 3rd electric capacity and the negative pole of diode link together with described model.
2. the PT100 temperature collect module of electric cabinet according to claim 1, it is characterized in that, described communicating circuit comprises the MAX485 communication module, described model be C8051F410 single-chip microcomputer the 21st with the 22nd pin the 4th being connected with the 1st pin of corresponding and described MAX485 communication module respectively, described model is the 2nd being connected with the 3rd pin of the 24th pin and described MAX485 communication module of the single-chip microcomputer of C8051F410.
3. the PT100 temperature collect module of electric cabinet according to claim 2 is characterized in that, comprises that also with described model be the multi-way switch amount output circuit that the signal output part of the single-chip microcomputer of C8051F410 is connected, and is used for realizing output control.
4. the PT100 temperature collect module of electric cabinet according to claim 3, it is characterized in that, described multi-way switch amount output circuit is 3 the tunnel, comprise the 8th resistance, the 9th resistance, the tenth resistance, first triode, second triode and the 3rd triode, wherein, model be C8051F410 single-chip microcomputer the 19th, the the 20th and the 23rd pin is corresponding to the 8th resistance respectively, the base stage of the 9th resistance and the tenth resistance and described first triode, the base stage of second triode is connected with the base stage of the 3rd triode, the collector of first triode, the collector of the collector of second triode and the 3rd triode is as the control output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110282024 CN102435339B (en) | 2011-09-21 | 2011-09-21 | Platinum (PT) 100 temperature acquisition module of electric cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110282024 CN102435339B (en) | 2011-09-21 | 2011-09-21 | Platinum (PT) 100 temperature acquisition module of electric cabinet |
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| CN102435339A CN102435339A (en) | 2012-05-02 |
| CN102435339B true CN102435339B (en) | 2013-08-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7340366B2 (en) * | 2004-03-04 | 2008-03-04 | Atmel Corporation | Method and apparatus of temperature compensation for integrated circuit chip using on-chip sensor and computation means |
| US7204638B2 (en) * | 2005-05-23 | 2007-04-17 | Etron Technology, Inc. | Precise temperature sensor with smart programmable calibration |
| CN201540175U (en) * | 2009-11-20 | 2010-08-04 | 北京遥测技术研究所 | Multi-channel digital temperature converter |
| CN202255674U (en) * | 2011-09-21 | 2012-05-30 | 淮南万泰电子股份有限公司 | PT 100 temperature collection module of electric cabinet |
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