CN105651402A - Temperature prewarning equipment - Google Patents
Temperature prewarning equipment Download PDFInfo
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- CN105651402A CN105651402A CN201610220126.9A CN201610220126A CN105651402A CN 105651402 A CN105651402 A CN 105651402A CN 201610220126 A CN201610220126 A CN 201610220126A CN 105651402 A CN105651402 A CN 105651402A
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- resistance
- amplifier
- electric capacity
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- temperature
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- 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
Abstract
The invention provides temperature prewarning equipment and aims to perform efficient and low-cost amplification processing on acquired temperature signals and accurately provide temperature prewarning information. The temperature prewarning equipment comprises a temperature signal amplification unit and a prewarning unit in series connection with the temperature signal amplification unit, wherein the temperature signal amplification unit is used for filtering and amplifying the temperature signals, and the prewarning unit compares output signals of the temperature signal amplification unit with a preset temperature signal and sends out a prewarning signal according to a comparison result. The temperature prewarning equipment can effectively filter out noise through multi-stage amplification and feedback, the antijamming capacity of the temperature signals is improved, the temperature prewarning accuracy is further improved, and the temperature prewarning error rate is reduced greatly.
Description
Technical field
The present invention relates to temperature detection technical field, more particularly, to a kind of temperature pre-warning equipment.
Background technology
Temperature is the physical quantity characterizing the cold and hot degree of object, and temperature is the physical quantity characterizing the cold and hot degree of object. Many production processes are all carry out in certain temperature range, it is necessary to measure temperature and control temperature. Carry out in certain temperature range, it is necessary to measure temperature and control temperature. Measuring method is varied, but under many circumstances, for the temperature survey under Practical Project scene or some specific conditions, temperature survey when such as to limiting temperature, high temperature corrosion medium temperature, gas flow temperature, surface temperature, solid interior Temperature Distribution, micro-dimension target temperature, large space Temperature Distribution, biological body temperature, electromagnetic interference, expect result not a duck soup accurately and reliably, need to be well familiar with principle and the feature of various measuring method, require to select suitable measuring method just can complete in conjunction with measurand. Meanwhile, also constantly to explore new thermometry, improve original measurement technology, to meet the temperature survey demand under various condition.
Although temperature detection technology reaches its maturity, but the temperature signal detected often has more noise signal, especially detects the signal pickup assembly of temperature when circumstance complication and cannot be set to too big, and signal self is faint. Therefore, the signal processing detected from temperature sensor is always up the problem that this area is paid close attention to.
Prior art is less to this type of technical progress. Through retrieval, in prior art, application number is that the Chinese utility model patent application of CN201420122522.4 discloses a kind of programmable-gain instrument temperature and amplifies harvester, cable and a feed cable is gathered including a main frame, a bars, one side of host housing is provided with signals collecting socket, and another side of main frame is provided with supply socket; Host housing is covered with turn knob potentiometer; Equipped with one piece of circuit board inside host housing, the circuit of this circuit board is made up of temperature signal input circuit, bridge balance testing circuit, signal filter circuit, Differential Input integrated amplifier, gain adjustment circuit, AVR single chip data acquisition circuit; Outside PT100 temperature sensor is connected with signals collecting socket by signals collecting cable, and the R4 of circuit board is connected with signals collecting socket, VCC and GND of circuit board is connected with supply socket, and the adjustable resistance R5 on circuit board is connected with turn knob potentiometer.
But, above-mentioned technology is mainly for instrument and uses, and the instrumentation amplifier cost wherein used is high, is unfavorable for promoting and commonly used.
Summary of the invention
In order to realize the temperature signal collected being carried out efficiently, low cost processing and amplifying, and temperature pre-warning information is provided exactly, the invention provides a kind of temperature pre-warning equipment, including temperature signal amplifying unit and the prewarning unit that concatenates with it, described temperature signal amplifying unit is for being filtered temperature signal and amplifying, and the output signal of described temperature signal amplifying unit and preset temperature signals are compared and send early warning signal according to comparative result by described prewarning unit.
Further, described temperature signal amplifying unit includes temperature signal filtering subelement and temperature signal amplifies subelement, and described temperature signal amplifies subelement and includes the first collection amplifying unit, the second collection amplifying unit and feedback output unit, wherein
First gathers amplifying unit, for temperature signal is carried out first order amplification;
Second gathers amplifying unit, and the signal for gathering amplifying unit output to first carries out second level amplification;
Feedback output unit, the output signal for gathering amplifying unit according to second gathers amplifying unit to the first order and feeds back, and signal is finally amplified in output.
Further, described first gathers amplifying unit includes resistance R0, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, electric capacity C2, and amplifier U1A, wherein one end of resistance R0 connects the outfan Vin of temperature sensor, the other end of resistance R0 connects first end of electric capacity C1 and the negative input end of amplifier U1A, the other end ground connection of electric capacity C1, the outfan Vin of described temperature sensor is also connected with one end of resistance R1 and first end of electric capacity C2, the other end of resistance R1 connects the positive input terminal of amplifier U1A, the outfan of amplifier U1A is sequentially connected with resistance R2, resistance R3, resistance R4 and resistance R5 and power end.
Further, described second collection amplifying unit includes resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, electric capacity C3, electric capacity C4, electric capacity C5, amplifier U2A, amplifier U3A, one end of amplifier U4A and amplifier U5A, resistance R6 connects second end of electric capacity C2, and the other end of resistance R6 connects the negative input end of amplifier U2A, one end of resistance R8, first end of electric capacity C3 and the negative input end of amplifier U3A, one end of resistance R7 is connected between resistance R5 and resistance R3, the other end of resistance R7 connects first end of electric capacity C4 and the positive input terminal of amplifier U2A, the positive input terminal of amplifier U3A is connected between resistance R2 and resistance R3, the outfan of amplifier U3A connects second end of electric capacity C4 and first end of electric capacity C5, and the outfan of amplifier U2A connects the other end of resistance R8 respectively, the positive input terminal of second end of electric capacity C3 and the negative input end of amplifier U4A and amplifier U5A, the negative input end of amplifier U5A is connected between resistance R4 and resistance R5, the outfan of amplifier U5A connects one end of resistance R10, the other end of resistance R10 connects one end of resistance R11, and the other end of resistance R11 connects the outfan of amplifier U4A.
Further, described feedback output unit includes resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, electric capacity C6, amplifier U6A, amplifier U7A, transistor T1, transistor T2, transistor T3 and electric capacity C7, wherein one end of resistance R13 connects the outfan of amplifier U4A, the other end of resistance R13 connects second end of electric capacity C5, one end of resistance R14 and the base stage of transistor T1, one end of resistance R12 it is connected between resistance R11 with resistance R10, the other end of resistance R14 connects the other end of resistance 12 and one end of first end of electric capacity C7 and resistance R16, it is connected to first end of electric capacity C7 also by electric capacity C8 between resistance R12 and resistance R16, the colelctor electrode of transistor T1 is connected between resistance R11 and resistance R12, the other end of resistance R16 connects the base stage of transistor T2, the emitter stage of transistor T2 connects the emitter stage of transistor T1, the colelctor electrode of transistor T2 connects the positive input terminal of amplifier U6A, the emitter stage of transistor T1 connects the negative input end of amplifier U6A, the outfan of amplifier U6A connects the base stage of transistor T3, the grounded collector of transistor T3, the emitter stage of transistor T3 connects one end of resistance R17 and first end of electric capacity C6, the other end of resistance R17 and the other end of electric capacity C16 are all connected with the outfan of amplifier U3A, the emitter stage of transistor T3 is also connected with the negative input end of amplifier U7A, second end of electric capacity C7 connects the outfan of amplifier U5A and connects the positive input terminal of amplifier U7A, the colelctor electrode of transistor T1 is connected to the positive input terminal of amplifier U1A via resistance R15.
The invention has the beneficial effects as follows: noise can be effective filtered out by multistage amplification and feedback, improve the capacity of resisting disturbance of temperature signal, and then improve the accuracy of temperature pre-warning, greatly reduce the wrong report probability of temperature pre-warning.
Accompanying drawing explanation
Fig. 1 illustrates the structured flowchart of the temperature pre-warning equipment according to the present invention.
Fig. 2 illustrates that the temperature signal according to the present invention amplifies the circuit diagram of subelement.
Detailed description of the invention
As shown in Figure 1, the temperature pre-warning equipment of the present invention includes temperature signal amplifying unit and the prewarning unit concatenated with it, described temperature signal amplifying unit is for being filtered temperature signal and amplifying, and the output signal of described temperature signal amplifying unit and preset temperature signals are compared and send early warning signal according to comparative result by described prewarning unit.
According to a preferred embodiment of the invention, described prewarning unit includes AD conversion subelement, compares subelement and acousto-optic alarm part-unit, described AD conversion subelement, for being converted into digital signal with the signal from analog signal amplified after filtering, compares with the threshold value preset through comparing subelement controllers such as () such as DSP. When comparative result is for exceeding predetermined threshold value, then sending enable signal to sound and light alarm subelement, described acousto-optic warning unit sends sound and/or the warning message of light form after being enabled.
Described temperature signal amplifying unit includes temperature signal filtering subelement and temperature signal amplifies subelement, and wherein said filtering subelement is for being filtered the temperature signal collected processing, and output amplifies subelement to described temperature signal.
As in figure 2 it is shown, described temperature signal amplifies subelement includes the first collection amplifying unit, the second collection amplifying unit and feedback output unit, wherein
First gathers amplifying unit, for temperature signal is carried out first order amplification;
Second gathers amplifying unit, and the signal for gathering amplifying unit output to first carries out second level amplification;
Feedback output unit, the output signal for gathering amplifying unit according to second gathers amplifying unit to the first order and feeds back, and signal is finally amplified in output.
According to a preferred embodiment of the invention, the particular circuit configurations of above-mentioned first collection amplifying unit, the second collection amplifying unit and feedback output unit is as follows:
Described first gathers amplifying unit includes resistance R0, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, electric capacity C2, and amplifier U1A, wherein one end of resistance R0 connects the outfan Vin of temperature sensor, the other end of resistance R0 connects first end of electric capacity C1 and the negative input end of amplifier U1A, the other end ground connection of electric capacity C1, the outfan Vin of described temperature sensor is also connected with one end of resistance R1 and first end of electric capacity C2, the other end of resistance R1 connects the positive input terminal of amplifier U1A, the outfan of amplifier U1A is sequentially connected with resistance R2, resistance R3, resistance R4 and resistance R5 and power end.
Described second gathers amplifying unit includes resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, electric capacity C3, electric capacity C4, electric capacity C5, amplifier U2A, amplifier U3A, one end of amplifier U4A and amplifier U5A, resistance R6 connects second end of electric capacity C2, and the other end of resistance R6 connects the negative input end of amplifier U2A, one end of resistance R8, first end of electric capacity C3 and the negative input end of amplifier U3A, one end of resistance R7 is connected between resistance R5 and resistance R3, the other end of resistance R7 connects first end of electric capacity C4 and the positive input terminal of amplifier U2A, the positive input terminal of amplifier U3A is connected between resistance R2 and resistance R3, the outfan of amplifier U3A connects second end of electric capacity C4 and first end of electric capacity C5, and the outfan of amplifier U2A connects the other end of resistance R8 respectively, the positive input terminal of second end of electric capacity C3 and the negative input end of amplifier U4A and amplifier U5A, the negative input end of amplifier U5A is connected between resistance R4 and resistance R5, the outfan of amplifier U5A connects one end of resistance R10, the other end of resistance R10 connects one end of resistance R11, and the other end of resistance R11 connects the outfan of amplifier U4A.
Described feedback output unit includes resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, electric capacity C6, amplifier U6A, amplifier U7A, transistor T1, transistor T2, transistor T3 and electric capacity C7, wherein one end of resistance R13 connects the outfan of amplifier U4A, the other end of resistance R13 connects second end of electric capacity C5, one end of resistance R14 and the base stage of transistor T1, one end of resistance R12 it is connected between resistance R11 with resistance R10, the other end of resistance R14 connects the other end of resistance 12 and one end of first end of electric capacity C7 and resistance R16, it is connected to first end of electric capacity C7 also by electric capacity C8 between resistance R12 and resistance R16, the colelctor electrode of transistor T1 is connected between resistance R11 and resistance R12, the other end of resistance R16 connects the base stage of transistor T2, the emitter stage of transistor T2 connects the emitter stage of transistor T1, the colelctor electrode of transistor T2 connects the positive input terminal of amplifier U6A, the emitter stage of transistor T1 connects the negative input end of amplifier U6A, the outfan of amplifier U6A connects the base stage of transistor T3, the grounded collector of transistor T3, the emitter stage of transistor T3 connects one end of resistance R17 and first end of electric capacity C6, the other end of resistance R17 and the other end of electric capacity C16 are all connected with the outfan of amplifier U3A, the emitter stage of transistor T3 is also connected with the negative input end of amplifier U7A, second end of electric capacity C7 connects the outfan of amplifier U5A and connects the positive input terminal of amplifier U7A, the colelctor electrode of transistor T1 is connected to the positive input terminal of amplifier U1A via resistance R15. the temperature pre-warning equipment of the present invention processes the final signal of gained and exports from Vout end.
Gather the preliminary amplification of amplifying unit by the above-mentioned first order, the second level gathers the secondary of amplifying unit and amplifies and by above-mentioned feedback, and this amplifier can effective filter out noise, improves the capacity of resisting disturbance of temperature signal.
It is understood that the principle that is intended to be merely illustrative of the present of embodiment of above and the illustrative embodiments that adopts, but the invention is not limited in this. For those skilled in the art, without departing from the spirit and substance in the present invention, it is possible to make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (5)
1. a temperature pre-warning equipment, it is characterized in that, including temperature signal amplifying unit and the prewarning unit that concatenates with it, described temperature signal amplifying unit is for being filtered temperature signal and amplifying, and the output signal of described temperature signal amplifying unit and preset temperature signals are compared and send early warning signal according to comparative result by described prewarning unit.
2. temperature pre-warning equipment according to claim 1, it is characterized in that, described temperature signal amplifying unit includes temperature signal filtering subelement and temperature signal amplifies subelement, described temperature signal amplifies subelement and includes the first collection amplifying unit, the second collection amplifying unit and feedback output unit, wherein
First gathers amplifying unit, for temperature signal is carried out first order amplification;
Second gathers amplifying unit, and the signal for gathering amplifying unit output to first carries out second level amplification;
Feedback output unit, the output signal for gathering amplifying unit according to second gathers amplifying unit to the first order and feeds back, and signal is finally amplified in output.
3. temperature pre-warning equipment according to claim 2, it is characterized in that, described first gathers amplifying unit includes resistance R0, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, electric capacity C2, and amplifier U1A, wherein one end of resistance R0 connects the outfan Vin of temperature sensor, the other end of resistance R0 connects first end of electric capacity C1 and the negative input end of amplifier U1A, the other end ground connection of electric capacity C1, the outfan Vin of described temperature sensor is also connected with one end of resistance R1 and first end of electric capacity C2, the other end of resistance R1 connects the positive input terminal of amplifier U1A, the outfan of amplifier U1A is sequentially connected with resistance R2, resistance R3, resistance R4 and resistance R5 and power end.
4. temperature pre-warning equipment according to claim 2, it is characterised in that described second gathers amplifying unit includes resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, electric capacity C3, electric capacity C4, electric capacity C5, amplifier U2A, amplifier U3A, one end of amplifier U4A and amplifier U5A, resistance R6 connects second end of electric capacity C2, and the other end of resistance R6 connects the negative input end of amplifier U2A, one end of resistance R8, first end of electric capacity C3 and the negative input end of amplifier U3A, one end of resistance R7 is connected between resistance R5 and resistance R3, the other end of resistance R7 connects first end of electric capacity C4 and the positive input terminal of amplifier U2A, the positive input terminal of amplifier U3A is connected between resistance R2 and resistance R3, the outfan of amplifier U3A connects second end of electric capacity C4 and first end of electric capacity C5, and the outfan of amplifier U2A connects the other end of resistance R8 respectively, the positive input terminal of second end of electric capacity C3 and the negative input end of amplifier U4A and amplifier U5A, the negative input end of amplifier U5A is connected between resistance R4 and resistance R5, the outfan of amplifier U5A connects one end of resistance R10, the other end of resistance R10 connects one end of resistance R11, and the other end of resistance R11 connects the outfan of amplifier U4A.
5. temperature pre-warning equipment according to claim 2, it is characterized in that, described feedback output unit includes resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, electric capacity C6, amplifier U6A, amplifier U7A, transistor T1, transistor T2, transistor T3 and electric capacity C7, wherein one end of resistance R13 connects the outfan of amplifier U4A, the other end of resistance R13 connects second end of electric capacity C5, one end of resistance R14 and the base stage of transistor T1, one end of resistance R12 it is connected between resistance R11 with resistance R10, the other end of resistance R14 connects the other end of resistance 12 and one end of first end of electric capacity C7 and resistance R16, it is connected to first end of electric capacity C7 also by electric capacity C8 between resistance R12 and resistance R16, the colelctor electrode of transistor T1 is connected between resistance R11 and resistance R12, the other end of resistance R16 connects the base stage of transistor T2, the emitter stage of transistor T2 connects the emitter stage of transistor T1, the colelctor electrode of transistor T2 connects the positive input terminal of amplifier U6A, the emitter stage of transistor T1 connects the negative input end of amplifier U6A, the outfan of amplifier U6A connects the base stage of transistor T3, the grounded collector of transistor T3, the emitter stage of transistor T3 connects one end of resistance R17 and first end of electric capacity C6, the other end of resistance R17 and the other end of electric capacity C16 are all connected with the outfan of amplifier U3A, the emitter stage of transistor T3 is also connected with the negative input end of amplifier U7A, second end of electric capacity C7 connects the outfan of amplifier U5A and connects the positive input terminal of amplifier U7A, the colelctor electrode of transistor T1 is connected to the positive input terminal of amplifier U1A via resistance R15.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610220126.9A CN105651402B (en) | 2016-04-11 | 2016-04-11 | A kind of temperature pre-warning equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610220126.9A CN105651402B (en) | 2016-04-11 | 2016-04-11 | A kind of temperature pre-warning equipment |
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| CN105651402A true CN105651402A (en) | 2016-06-08 |
| CN105651402B CN105651402B (en) | 2018-11-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110288797A (en) * | 2019-07-02 | 2019-09-27 | 昆明理工大学 | A kind of embedded temperature pre-warning equipment blended together based on industry |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2731511Y (en) * | 2004-09-02 | 2005-10-05 | 上海力申科学仪器有限公司 | Overtemp protective circuit board for incubator |
| CN101373956A (en) * | 2008-09-17 | 2009-02-25 | 清华大学 | Method for compensating common mode feedback circuit frequency of two-stage amplifier |
| WO2011139613A1 (en) * | 2010-05-07 | 2011-11-10 | Catena Holding Inc. | Method for using an amplifier |
| US8536923B2 (en) * | 2011-07-21 | 2013-09-17 | Analog Devices, Inc. | Integrator distortion correction circuit |
| CN103954794A (en) * | 2014-05-13 | 2014-07-30 | 安徽理工大学 | Charge amplification and acquisition system of low-frequency piezoelectricity acceleration sensor |
-
2016
- 2016-04-11 CN CN201610220126.9A patent/CN105651402B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731511Y (en) * | 2004-09-02 | 2005-10-05 | 上海力申科学仪器有限公司 | Overtemp protective circuit board for incubator |
| CN101373956A (en) * | 2008-09-17 | 2009-02-25 | 清华大学 | Method for compensating common mode feedback circuit frequency of two-stage amplifier |
| WO2011139613A1 (en) * | 2010-05-07 | 2011-11-10 | Catena Holding Inc. | Method for using an amplifier |
| US8536923B2 (en) * | 2011-07-21 | 2013-09-17 | Analog Devices, Inc. | Integrator distortion correction circuit |
| CN103954794A (en) * | 2014-05-13 | 2014-07-30 | 安徽理工大学 | Charge amplification and acquisition system of low-frequency piezoelectricity acceleration sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110288797A (en) * | 2019-07-02 | 2019-09-27 | 昆明理工大学 | A kind of embedded temperature pre-warning equipment blended together based on industry |
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| CN105651402B (en) | 2018-11-27 |
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Effective date of registration: 20181010 Address after: 064200 Yan jiantun village east of Jianming Town, Zunhua, Hebei Applicant after: Zunhua Zan delicacy food Co., Ltd. Address before: 610041 No. 220, Zhong Bai Road, Zhong He street, hi tech Zone, Chengdu, Sichuan Applicant before: Chengdu Rui Tu Electronics Co., Ltd. |
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