CN203163882U - Dual-limit temperature alarming device circuit - Google Patents
Dual-limit temperature alarming device circuit Download PDFInfo
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- CN203163882U CN203163882U CN201320107558.0U CN201320107558U CN203163882U CN 203163882 U CN203163882 U CN 203163882U CN 201320107558 U CN201320107558 U CN 201320107558U CN 203163882 U CN203163882 U CN 203163882U
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Abstract
The utility model discloses a dual-limit temperature alarming device circuit comprising a switch, a power supply, a temperature detection control circuit, a temperature indicating circuit, and a sound alarming circuit. An anode of the power supply is connected with a first end of the switch. The temperature detection control circuit comprises a temperature sensing control integrated circuit, a first potentiometer, and a second potentiometer. A high trigger end of the temperature sensing control integrated circuit is connected with a first end of the first potentiometer, and a low trigger end of the temperature sensing control integrated circuit is connected with a first end of the second potentiometer. The dual-limit temperature alarming device circuit is worthy of popularization and application, and has advantages of simple structure, high detection sensitivity, high reliability, and ability of overcoming defects of prior art.
Description
Technical field
The utility model relates to a kind of temperature alarm circuit, relates in particular to a kind of pair of limit temperature alarm circuit.
Background technology
At present, novel temperature control alarm is just developed to intelligent, networked direction by integrated to digital, electronic type from analog.Old-fashioned mechanical type temperature control alarm, for example bimetallic strip or inflation bellows because its profile is huge, are unfavorable for that daily life uses, and detection sensitivity, precision are all not high and reliability is low, are eliminated gradually.
The utility model content
The purpose of this utility model just is to provide in order to address the above problem a kind of simple in structure, detection sensitivity is high, reliability is high two limit temperature alarm circuit.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of pair of limit temperature alarm circuit, comprise switch and power supply, the positive pole of described power supply is connected with first end of described switch, also comprise temperature detection control circuit, temperature indicator circuit and sound warning circuit, described temperature detection control circuit comprises temperature sensing control integrated circuit, first potentiometer and second potentiometer, the high-triggering end of described temperature sensing control integrated circuit is connected with first end of described first potentiometer, and the low triggering end of described temperature sensing control integrated circuit is connected with first end of described second potentiometer.
Particularly, described temperature indicator circuit comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, electric capacity, first triode, second triode, voltage stabilizing diode, first light emitting diode and second light emitting diode, first end of described first resistance is connected with first control end of described temperature sensing control integrated circuit, first end of described second resistance is connected with second control end of described temperature sensing control integrated circuit, second end of described first resistance is connected with the base stage of described first triode, the collector of described first triode is connected with the negative pole of described first light emitting diode, the positive pole of described first light emitting diode is connected with first end of described the 3rd resistance, second end of described the 3rd resistance respectively with the sliding end of described first potentiometer, second end of described first potentiometer, the electrode input end of described temperature sensing control integrated circuit, the sliding end of described second potentiometer, second end of described second potentiometer, first end of described the 4th resistance connects, the emitter of described first triode is connected with first end of described electric capacity, second end of described electric capacity is connected with the negative input of described temperature sensing control integrated circuit and the positive pole of described voltage stabilizing diode respectively, the negative pole of described voltage stabilizing diode is connected with the collector of described second triode, the base stage of described second triode is connected with second end of described second resistance, the emitter of described second triode is connected with the negative pole of described second light emitting diode, and the positive pole of described second light emitting diode is connected with second end of described the 4th resistance.
Particularly, described audible alarm circuit comprises speech IC, the 3rd triode and loudspeaker, first signal input part of described speech IC respectively with the secondary signal input end of described speech IC, first end of the emitter of described first triode and described electric capacity is connected, the signal output part of described speech IC is connected with the base stage of described the 3rd triode, the collector of described the 3rd triode is connected with first end of described loudspeaker, second end of described loudspeaker is connected with second end of described switch and first end of described the 4th resistance respectively, the emitter of described the 3rd triode respectively with the negative input of described speech IC, the positive pole of described voltage stabilizing diode is connected with the negative pole of described power supply.
The beneficial effects of the utility model are:
The utility model has designed two limit temperature alarm circuit simple in structure, that detection sensitivity is high, reliability is high at the shortcoming of prior art.
Description of drawings
Fig. 1 is the circuit diagram of the two limit temperature alarm circuit of the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the two limit temperature alarm circuit of the utility model, comprise switch S and power supply, the positive pole of power supply is connected with first end of switch S, also comprise temperature detection control circuit, temperature indicator circuit and sound warning circuit, temperature detection control circuit comprises temperature sensing control integrated circuit (IC) 1, the first potentiometer RP1 and the second potentiometer RP2, the high-triggering end of temperature sensing control integrated circuit (IC) 1 is connected with first end of the first potentiometer RP1, and the low triggering end of temperature sensing control integrated circuit (IC) 1 is connected with first end of the second potentiometer RP2.
Temperature indicator circuit comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, capacitor C, the first triode VT1, the second triode VT2, voltage stabilizing diode VS, first LED 1 and second LED 2, first end of first resistance R 1 is connected with first control end of temperature sensing control integrated circuit (IC) 1, first end of second resistance R 2 is connected with second control end of temperature sensing control integrated circuit (IC) 1, second end of first resistance R 1 is connected with the base stage of the first triode VT1, the collector of the first triode VT1 is connected with the negative pole of first LED 1, the positive pole of first LED 1 is connected with first end of the 3rd resistance R 3, second end of the 3rd resistance R 3 respectively with the sliding end of the first potentiometer RP1, second end of the first potentiometer RP1, the electrode input end of temperature sensing control integrated circuit (IC) 1, the sliding end of the second potentiometer RP2, second end of the second potentiometer RP2, first end of the 4th resistance R 4 connects, the emitter of the first triode VT1 is connected with first end of capacitor C, second end of capacitor C is connected with the negative input of temperature sensing control integrated circuit (IC) 1 and the positive pole of voltage stabilizing diode VS respectively, the negative pole of voltage stabilizing diode VS is connected with the collector of the second triode VT2, the base stage of the second triode VT2 is connected with second end of second resistance R 2, the emitter of the second triode VT2 is connected with the negative pole of second LED 2, and the positive pole of second LED 2 is connected with second end of the 4th resistance R 4.
The audible alarm circuit comprises speech IC IC2, the 3rd triode VT3 and loudspeaker BL, first signal input part of speech IC IC2 respectively with the secondary signal input end of speech IC IC2, first end of the emitter of the first triode VT1 and capacitor C is connected, the signal output part of speech IC IC2 is connected with the base stage of the 3rd triode VT3, the collector of the 3rd triode VT3 is connected with first end of loudspeaker BL, second end of loudspeaker BL is connected with second end of switch S and first end of the 4th resistance R 4 respectively, the emitter of the 3rd triode VT3 respectively with the negative input of speech IC IC2, the positive pole of voltage stabilizing diode VS is connected with the negative pole of power supply.
Use the principle of work of the two limit temperature alarm circuit of the utility model as follows:
After the power on circuitry, when dut temperature is between the higher limit of alarm temperature and lower limit, the first control end output low level of temperature sensing control integrated circuit TC602, second control end output high level, make the first triode VT1, the second triode VT2 all be in cut-off state, first LED 1 and second LED 2 are all not luminous.Simultaneously, speech IC KD9561 and the 3rd triode VT3 do not work, and loudspeaker BL is sounding not.
When dut temperature is lower than the lower limit of alarm temperature, first control end of temperature sensing control integrated circuit TC602 keeps low level constant, second control end is low level by the high level saltus step, make the second triode VT2 be in conducting state, drive second LED 2 and light, the indication dut temperature is on the low side; Simultaneously, the speech IC KD9561 work of switching on, the voice signal of its output drives loudspeaker BL and sends chimes of doom after the 3rd triode VT3 amplifies.
When dut temperature is higher than the higher limit of alarm temperature, second control end of temperature sensing control integrated circuit TC602 keeps high level constant, first control end is high level by low transition, make the first triode VT1 be in conducting state, driving first LED 1 lights, the indication dut temperature is higher, the work of speech IC KD9561 energising simultaneously, and loudspeaker BL sends chimes of doom.
Claims (3)
1. two limit temperature alarm circuit, comprise switch and power supply, the positive pole of described power supply is connected with first end of described switch, it is characterized in that: also comprise temperature detection control circuit, temperature indicator circuit and sound warning circuit, described temperature detection control circuit comprises temperature sensing control integrated circuit, first potentiometer and second potentiometer, the high-triggering end of described temperature sensing control integrated circuit is connected with first end of described first potentiometer, and the low triggering end of described temperature sensing control integrated circuit is connected with first end of described second potentiometer.
2. a kind of pair of limit temperature alarm circuit according to claim 1, it is characterized in that: described temperature indicator circuit comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, electric capacity, first triode, second triode, voltage stabilizing diode, first light emitting diode and second light emitting diode, first end of described first resistance is connected with first control end of described temperature sensing control integrated circuit, first end of described second resistance is connected with second control end of described temperature sensing control integrated circuit, second end of described first resistance is connected with the base stage of described first triode, the collector of described first triode is connected with the negative pole of described first light emitting diode, the positive pole of described first light emitting diode is connected with first end of described the 3rd resistance, second end of described the 3rd resistance respectively with the sliding end of described first potentiometer, second end of described first potentiometer, the electrode input end of described temperature sensing control integrated circuit, the sliding end of described second potentiometer, second end of described second potentiometer, first end of described the 4th resistance connects, the emitter of described first triode is connected with first end of described electric capacity, second end of described electric capacity is connected with the negative input of described temperature sensing control integrated circuit and the positive pole of described voltage stabilizing diode respectively, the negative pole of described voltage stabilizing diode is connected with the collector of described second triode, the base stage of described second triode is connected with second end of described second resistance, the emitter of described second triode is connected with the negative pole of described second light emitting diode, and the positive pole of described second light emitting diode is connected with second end of described the 4th resistance.
3. a kind of pair of limit temperature alarm circuit according to claim 2, it is characterized in that: described audible alarm circuit comprises speech IC, the 3rd triode and loudspeaker, first signal input part of described speech IC respectively with the secondary signal input end of described speech IC, first end of the emitter of described first triode and described electric capacity is connected, the signal output part of described speech IC is connected with the base stage of described the 3rd triode, the collector of described the 3rd triode is connected with first end of described loudspeaker, second end of described loudspeaker is connected with second end of described switch and first end of described the 4th resistance respectively, the emitter of described the 3rd triode respectively with the negative input of described speech IC, the positive pole of described voltage stabilizing diode is connected with the negative pole of described power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320107558.0U CN203163882U (en) | 2013-03-11 | 2013-03-11 | Dual-limit temperature alarming device circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320107558.0U CN203163882U (en) | 2013-03-11 | 2013-03-11 | Dual-limit temperature alarming device circuit |
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| Publication Number | Publication Date |
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| CN203163882U true CN203163882U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320107558.0U Expired - Fee Related CN203163882U (en) | 2013-03-11 | 2013-03-11 | Dual-limit temperature alarming device circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048769A (en) * | 2013-03-11 | 2014-09-17 | 成都艺创科技有限公司 | Double-threshold temperature alarm circuit |
| CN104359579A (en) * | 2014-11-05 | 2015-02-18 | 天津市畅悦电子科技有限公司 | Temperature sensing circuit |
| CN105547507A (en) * | 2016-01-15 | 2016-05-04 | 芜湖市恒峰科技有限公司 | Low-loss long-service-life temperature detection alarm circuit |
| CN107687903A (en) * | 2017-08-18 | 2018-02-13 | 过成康 | A kind of high-precision temperature automatic detection and alarming device |
-
2013
- 2013-03-11 CN CN201320107558.0U patent/CN203163882U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048769A (en) * | 2013-03-11 | 2014-09-17 | 成都艺创科技有限公司 | Double-threshold temperature alarm circuit |
| CN104359579A (en) * | 2014-11-05 | 2015-02-18 | 天津市畅悦电子科技有限公司 | Temperature sensing circuit |
| CN105547507A (en) * | 2016-01-15 | 2016-05-04 | 芜湖市恒峰科技有限公司 | Low-loss long-service-life temperature detection alarm circuit |
| CN107687903A (en) * | 2017-08-18 | 2018-02-13 | 过成康 | A kind of high-precision temperature automatic detection and alarming device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20140311 |