CN201436565U - A progression typed electronic temperature display circuit - Google Patents
A progression typed electronic temperature display circuit Download PDFInfo
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- CN201436565U CN201436565U CN2009200561212U CN200920056121U CN201436565U CN 201436565 U CN201436565 U CN 201436565U CN 2009200561212 U CN2009200561212 U CN 2009200561212U CN 200920056121 U CN200920056121 U CN 200920056121U CN 201436565 U CN201436565 U CN 201436565U
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Abstract
The utility model discloses a progression typed electronic temperature display circuit, which comprises: a power module for supplying working voltage, a temperature sensor for converting temperature into voltage signal, over one group of temperature display driver module for comparing temperature-sensing voltage signals and outputting driving signal after setting reference voltage, over one group of display devices corresponded with the driver module for displaying different temperature progression in combination; a temperature-sensing voltage output end of the temperature sensor is connected with a temperature-sensing voltage input end of each group of comparators; a driving signal output end of the driver module is connected with a signal display input end of the corresponded group. Compared with current technology, the progression typed electronic temperature display circuit has the advantages that: a certain grading temperature segment is set by a grading display, thus different temperature needs can be satisfied; the employment is simple; only common electronic devices are adopted; the maintenance is simple; the cost is low.
Description
Technical field
The utility model relates to a kind of electron temperature display circuit, relates in particular to a kind of grade of numerical expression electron temperature display circuit.
Background technology
Two kinds of process for temperature indication of ubiquity in the prior art: a kind of is heating always after the energising, lights pilot lamp when temperature surpasses 100 degree temperature, and this demonstration can not be satisfied the various temperature demand.Another is to adopt digital display, rise and show Current Temperatures accurately continuously with temperature, but this display circuit is relatively complicated, and the cost height uses the product price of this display circuit expensive.
The utility model purpose
The utility model purpose is to provide a kind of electron temperature display circuit that can the classification display temperature.
The purpose of this utility model can realize by following scheme: a kind of grade of numerical expression electron temperature display circuit comprises: power module is used to provide operating voltage; Temperature sensor, being used for temperature transition is voltage signal; One group of above temperature driver module, output drive signal after being used for comparison temperature-sensitive voltage signal and setting reference voltage; One group or more the display device corresponding with driver module is used for combination and shows different temperatures progression; Described temperature sensor temperature-sensitive voltage output end connects the temperature-sensitive voltage input end of each group comparer, and the drive signal output terminal of driver module connects the display device shows signal input end to organizing.
Temperature driver module described in the utility model is selected two groups to seven groups for use, described display device correspondence select two groups to seven groups for use, the corresponding one-level design temperature that shows of every group display equipment spare.
Every group of temperature driver module described in the utility model is the computing amplifier comparator, organizes the computing amplifier comparator more and uses one or more computing amplifier comparator chips to finish.
In many group computing amplifier comparators described in the utility model, the C.T. that drives the comparer that rudimentary temperature shows is less than the C.T. that drives senior temperature comparator.
The resistance value of temperature sensor described in the utility model raises with temperature and descends.
Display device described in the utility model is a LED, and the shows signal input end of described light emitting diode connects the shows signal output terminal of driver module, and another utmost point of light emitting diode connects the signal circuit output terminal.
Display device described in the utility model is LCD LCD, and the shows signal input end of described LCD connects the shows signal output terminal of driver module, and another utmost point of LCD connects the signal circuit output terminal.
The relative prior art advantage of the utility model is: classification display is provided with certain hierarchical temperature section, promptly can satisfy different temperature needs, uses simple; And only adopt common electron device, easy to maintenance, cost is cheap.
Figure of description
Fig. 1 is the electrical block diagram of the utility model most preferred embodiment;
Fig. 2 is the LED displays temperature progression synoptic diagram of the utility model most preferred embodiment;
Fig. 3 is a LCD displays temperature progression synoptic diagram of the present utility model.
Embodiment
The present invention adopts the above temperature driver module of one-level to form multistage display circuit, each road all is to be input to comparer by the temperature-sensitive voltage that temperature sensor sends, comparer compares the comparative voltage of temperature-sensitive voltage and setting, when temperature-sensitive voltage during greater than comparative voltage, the display device of this group will be shinny, shows that dut temperature has surpassed the temperature of this grade setting.Can adopt secondary display circuit, three grades, level Four ... or seven grades of display circuits, show successively by multistage, just can reach the temperature grade that classification display goes out the dut temperature place.Generally be set at first order temperature displayed minimum, every toward the just raising of upper level design temperature, the afterbody temperature displayed is the highest.Temperature shows that the temperature section of every grade of sum of series can be provided with as required.
Preferred forms of the present invention is to adopt four groups of driver modules.As shown in Figure 1, rectifier power source output 12V operating voltage, it is the LM324 chip that integrated circuit adopts model, LM324 includes four voltage comparators 1～4.Power input is connected the in-phase input end of comparer 1～4 respectively with R13 through resistance R 2, R4, R10, power input also connects the inverting input of comparer 1～4 by temperature sensor, the voltage output end of comparer 1～4 connects light emitting diode D6, D5, D8, D9 respectively, and four light emitting diodes connect power input by corresponding divider resistance.Wherein temperature sensor adopts temperature-sensing probe, and its resistance value descends with the rising of temperature.
Principle of work is: temperature constantly rises, and the resistance of temperature-sensing probe descends thereupon, and the pin 13,9,6 of LM324 and 2 current potentials rise.The reference voltage that other four pins 12,10,5 of LM324 and 3 are fixed by four divider resistance R2, R4, R10 and R13.Four divider resistance resistance R2＞R4＞R10＞R13 are so the reference voltage of four comparers is risen progressively successively.Because other divider resistance height of initial resistance value ratio of temperature-sensing probe NTC, so the anti-phase current potential of four comparers all is lower than the homophase current potential, four comparers are all exported high level, correspondingly four not conductings of light emitting diode.When temperature raises, the resistance of temperature-sensing probe NTC descends, and the anti-phase current potential of four comparers increases, when the homophase current potential that surpasses comparer 1, and comparer 1 output low level then, light emitting diode D6 conducting.When temperature continue to raise, the resistance of temperature-sensing probe NTC further descends, when anti-phase current potential is higher than the homophase current potential of comparer 2, and comparer output low level then, light emitting diode D5 conducting.Same principle, temperature continue to raise light emitting diode D8, D9 conducting successively.
The resistance relation of described first resistance, second resistance, the 3rd resistance and the 4th resistance is:
| 70℃ | 80℃ | 90℃ | 95℃ | |
| In-phase end | R7*12V/(R7+R2) | R9*12V/(R4+R9) | R11*12V/(R11+R10) | R14*12V/(R13+R14) |
| End of oppisite phase | R8*12v/(NTC+R8) | R8*12v/(NTC+R8) | R8*12v/(NTC+R8) | R8*12v/(NTC+R8) |
According to the critical temperature of four diode current flows, the temperature that can mark off following progression shows.The circuit of present embodiment is divided into I:T＜70, II:70≤T＜80, III:80≤T＜90, IV:90≤T＜95, five temperature grades of V:95≤T with temperature, and the conducting situation of light emitting diode as shown in Figure 2.Wherein black is represented the LED conducting.
Temperature grade pilot lamp of the present utility model is except with replacing with LCD the LED.As shown in Figure 3, white expression LCD closes, and black is represented the LCD action, and four different luminances of LCD can have been represented five above-mentioned temperature grades equally.The positive and negative pin of LCD connects the voltage output end of power input and four comparers respectively.
Embodiment of the present utility model is not limited thereto, according to foregoing of the present utility model, ordinary skill knowledge and customary means according to this area, do not breaking away under the above-mentioned basic fundamental thought of the utility model prerequisite, equivalent modifications, replacement or change that the utility model can also be made other various ways all can realize the utility model purpose.
Claims (7)
1. level numerical expression electron temperature display circuit, comprising: power module is used to provide operating voltage; It is characterized in that, also comprise: temperature sensor is used for the temperature difference is converted to voltage signal; One group of above temperature driver module, output drive signal after being used for comparison temperature-sensitive voltage signal and setting reference voltage; One group or more the display device corresponding with driver module is used for combination and shows different temperatures progression; Described temperature sensor temperature-sensitive voltage output end connects the temperature-sensitive voltage input end of each group comparer, and the drive signal output terminal of driver module connects the display device shows signal input end to organizing.
2. a kind of grade of numerical expression electron temperature display circuit according to claim 1, it is characterized in that, described temperature driver module is selected two groups to seven groups for use, described display device correspondence select two groups to seven groups for use, the corresponding one-level design temperature that shows of every group display equipment spare.
3. a kind of grade of numerical expression electron temperature display circuit according to claim 1 and 2 is characterized in that described every group of temperature driver module is the computing amplifier comparator, organizes the computing amplifier comparator more and is integrated on the same chip.
4. a kind of grade of numerical expression electron temperature display circuit according to claim 3 is characterized in that, in described many group computing amplifier comparators, the C.T. that drives the comparer that rudimentary temperature shows is less than the C.T. that drives senior temperature comparator.
5. a kind of grade of numerical expression electron temperature display circuit according to claim 1 is characterized in that, the resistance value of described temperature sensor raises with temperature and descends.
6. a kind of grade of numerical expression electron temperature display circuit according to claim 1, it is characterized in that, described display device is a LED, the shows signal input end of described light emitting diode connects the shows signal output terminal of driver module, and another utmost point of light emitting diode connects the signal circuit output terminal.
7. a kind of grade of numerical expression electron temperature display circuit according to claim 1, it is characterized in that, described display device is LCD LCD, the shows signal input end of described LCD connects the shows signal output terminal of driver module, and another utmost point of LCD connects the signal circuit output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200561212U CN201436565U (en) | 2009-05-07 | 2009-05-07 | A progression typed electronic temperature display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200561212U CN201436565U (en) | 2009-05-07 | 2009-05-07 | A progression typed electronic temperature display circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201436565U true CN201436565U (en) | 2010-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200561212U Expired - Fee Related CN201436565U (en) | 2009-05-07 | 2009-05-07 | A progression typed electronic temperature display circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620843A (en) * | 2012-04-18 | 2012-08-01 | 上海中科高等研究院 | Chip over-temperature monitor |
| CN104867278A (en) * | 2015-05-29 | 2015-08-26 | 安徽康成工业产品设计有限公司 | Automatic level-dividing mechanical reminding device |
| CN110426139A (en) * | 2019-08-09 | 2019-11-08 | 杭州磊鑫精密仪器有限公司 | A kind of thermometric management system and management method based on mobile terminal |
-
2009
- 2009-05-07 CN CN2009200561212U patent/CN201436565U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620843A (en) * | 2012-04-18 | 2012-08-01 | 上海中科高等研究院 | Chip over-temperature monitor |
| CN102620843B (en) * | 2012-04-18 | 2013-09-11 | 上海中科高等研究院 | Chip over-temperature monitor |
| CN104867278A (en) * | 2015-05-29 | 2015-08-26 | 安徽康成工业产品设计有限公司 | Automatic level-dividing mechanical reminding device |
| CN110426139A (en) * | 2019-08-09 | 2019-11-08 | 杭州磊鑫精密仪器有限公司 | A kind of thermometric management system and management method based on mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangzhou CoreTech Electronic Products Co., Ltd. Assignor: Top Electric Appliances Industrial Ltd. Contract record no.: 2011440001132 Denomination of utility model: A progression typed electronic temperature display circuit Granted publication date: 20100407 License type: Exclusive License Record date: 20111231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100407 Termination date: 20170507 |