CN208505484U - A kind of temperature alarming device - Google Patents
A kind of temperature alarming device Download PDFInfo
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- CN208505484U CN208505484U CN201821134819.7U CN201821134819U CN208505484U CN 208505484 U CN208505484 U CN 208505484U CN 201821134819 U CN201821134819 U CN 201821134819U CN 208505484 U CN208505484 U CN 208505484U
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Abstract
The utility model provides a kind of temperature alarming device by temperature detecting unit when the temperature change for detecting ambient enviroment is greater than preset threshold, export DC signal, DC signal is divided using divider resistance, to obtain temperature change signal, and pass through signal output node output temperature variable signal, trigger signal is generated according to temperature change signal by control unit again, sound is finally issued according to trigger signal by alarm unit, the temperature change realized in ambient enviroment is either increased or is reduced, as long as temperature change is greater than preset threshold, alarm can be realized, improve the scope of application of temperature alarming device.
Description
Technical field
The utility model belongs to electronic technology field more particularly to a kind of temperature alarming device.
Background technique
Temperature alarming device is generally applied in the environment for needing to carry out monitoring temperature, such as closed job shop,
Operating room etc..
Although existing temperature alarming device can alarm when temperature is higher or lower than some temperature value, realization
It is unidirectional temperature measurement and unidirectional temperature alarming, isoperibol can not be suitable for and carry out temperature alarming namely existing temperature report
There is smaller scope of application in alarm device.
Utility model content
The utility model embodiment provides a kind of temperature alarming device, and the applicable model of temperature alarming device can be improved
It encloses.
The purpose of this utility model is to provide a kind of temperature alarming devices, are connected with power supply unit, comprising:
Temperature detecting unit is connected with said supply unit, pre- for being greater than in the temperature change for detecting ambient enviroment
If when threshold value, exporting DC signal；
Divider resistance is connected with the temperature detecting unit, forms signal output node, and the divider resistance is used for institute
It states DC signal to be divided, to obtain temperature change signal, and the temperature is exported by the signal output node and is become
Change signal；
Control unit is connected with the signal output node, for generating trigger signal according to the temperature change signal；
Alarm unit is connected with described control unit, for issuing sound according to the trigger signal.
A kind of temperature alarming device provided by the utility model is by temperature detecting unit in the temperature for detecting ambient enviroment
When degree variation is greater than preset threshold, DC signal is exported, DC signal is divided using divider resistance, to obtain temperature
Variable signal is spent, and by signal output node output temperature variable signal, then raw according to temperature change signal by control unit
At trigger signal, finally by alarm unit according to trigger signal issue sound, realize ambient enviroment temperature change no matter
It is to increase or reduce, as long as temperature change is greater than preset threshold, alarm can be realized, improves being applicable in for temperature alarming device
Range.
Detailed description of the invention
In order to illustrate more clearly of the utility model embodiment technical solution, will make below to required in embodiment description
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of temperature alarming device provided by the embodiment of the utility model；
Fig. 2 is a kind of structural schematic diagram for temperature alarming device that another embodiment of the utility model provides；
Fig. 3 is a kind of concrete structure schematic diagram for temperature alarming device that another embodiment of the utility model provides；
Fig. 4 is the control unit and alarm unit for a kind of temperature alarming device that another embodiment of the utility model provides
Physical circuit figure.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that the embodiments are a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Figure 1, Fig. 1 is a kind of structural schematic diagram of temperature alarming device provided by the embodiment of the utility model, is
Convenient for explanation, part relevant to the utility model embodiment is illustrated only.
As shown in Figure 1, a kind of temperature alarming device 100 is connected with power supply unit 110, temperature alarming device 100 includes: temperature
Spend detection unit 10, divider resistance 20, control unit 30 and alarm unit 40.Specifically:
Temperature detecting unit 10 is connected with power supply unit 110, pre- for being greater than in the temperature change for detecting ambient enviroment
If when threshold value, exporting DC signal.
Divider resistance 20 is connected with temperature detecting unit 10, forms signal output node A, and divider resistance 20 is used for straight
Galvanic electricity signal is divided, and to obtain temperature change signal, and passes through signal output node A output temperature variable signal.
Control unit 30 is connected with signal output node A, for generating trigger signal according to temperature change signal.
Alarm unit 40 is connected with control unit 30, for issuing sound according to trigger signal.
In the present embodiment, the temperature change of ambient enviroment may include that temperature raising or temperature reduce, when temperature is examined
When survey unit 10 detects that the variation size of the temperature value of ambient enviroment is greater than preset threshold, DC signal, the direct current are exported
Electric signal has occurred and that variation for characterizing current environmental temperature.
It should be noted that the temperature change of ambient enviroment is equal to the difference of current detection temperature and reference temperature, wherein when
Preceding detection temperature is obtained by 10 examinations of temperature detecting unit, and reference temperature is preset temperature, if current detection temperature from
Under reference temperature becomes larger or becomes, and variation range is greater than preset threshold, then exports DC signal.
Divider resistance 20 divides DC signal, by signal output node A to 30 output temperature of control unit
Variable signal so that control unit 30 generates trigger signal according to the temperature change signal, and then triggers alarm unit 40 and issues
Sound.
A kind of temperature alarming device provided by the utility model is by temperature detecting unit in the temperature for detecting ambient enviroment
When degree variation is greater than preset threshold, DC signal is exported, DC signal is divided using divider resistance, to obtain temperature
Variable signal is spent, and by signal output node output temperature variable signal, then raw according to temperature change signal by control unit
At trigger signal, finally by alarm unit according to trigger signal issue sound, realize ambient enviroment temperature change no matter
It is to increase or reduce, as long as temperature change is greater than preset threshold, alarm can be realized, improves being applicable in for temperature alarming device
Range.
Fig. 2 shows a kind of structural schematic diagrams for temperature alarming device that another embodiment of the utility model provides.
It should be noted that in the present embodiment, control unit 30 is also used to export display letter according to temperature change signal
Number.
As shown in Fig. 2, in the present embodiment, temperature alarming device 100 further include: display unit 50 and wireless communication unit
60.Specifically:
Display unit 50 is connected with control unit Unit 30, for according to the temperature after display signal display variation.
Wireless communication unit 60 is connected with control unit Unit 30, reports for being sent according to trigger signal to default host computer
Alert signal.
As a kind of mode in the cards of the present embodiment, wireless communication unit 60 may include wireless local area net unit,
ZigBee protocol unit, global positioning system unit or cellular calls unit.
Further, as a kind of mode in the cards of the present embodiment, cellular calls can include with unit 2G communication unit,
3G telephony unit, 4G telephony unit or 5G telephony unit.
Fig. 3 shows a kind of concrete structure schematic diagram for temperature alarming device that another embodiment of the utility model provides.
As shown in figure 3, temperature detecting unit 10 includes: positive temperature coefficient unit 11 and negative temperature coefficient unit 12.Specifically
Ground:
Positive temperature coefficient unit 11 is connected between power supply unit 110 and divider resistance 20, for the temperature in ambient enviroment
When degree is greater than the first preset temperature value, the first DC signal is exported, and be equal to or less than second in advance in the temperature of ambient enviroment
If when temperature value, forming open circuit between divider resistance 20.
Negative temperature coefficient unit 12 is connected between power supply unit 110 and divider resistance 20, for the temperature in ambient enviroment
When degree is less than the second preset temperature value, the first DC signal is exported, and be equal to or more than first in advance in the temperature of ambient enviroment
If when temperature value, forming open circuit between divider resistance 20.
It should be noted that there are identical with reference to temperature between positive temperature coefficient unit 11 and negative temperature coefficient unit 12
Degree, in the case where ambient temperature is the reference temperature, the resistance value of positive temperature coefficient unit 11 and negative temperature coefficient unit 12 is nothing
Poor big namely signal output node A output is low level.When ambient temperature variation, for example, ambient temperature is greater than
When reference temperature, the resistance value of positive temperature coefficient unit 11 is still intended to infinity, at this point, the resistance value of negative temperature coefficient unit 12
Become smaller, and then direct current is exported by signal output node A.For another example when ambient temperature is less than reference temperature, negative temperature
The resistance value of coefficient elements 12 is still intended to infinity, at this point, the resistance value of positive temperature coefficient unit 11 becomes smaller, and then passes through signal
Output node A exports direct current.
In other embodiments, temperature detecting unit 10 can also include thermocouple.
As a kind of mode in the cards of the present embodiment, embodiment is proposed for the physical circuit of temperature alarming device,
Fig. 4 shows a kind of control unit 30 of temperature alarming device provided in this embodiment and a kind of physical circuit of alarm unit 40
Figure.
As shown in figure 4, control unit 30 includes the first chip U1, the power end of the first chip U1 is connected with power vd D, the
The enable end EN of one chip U1 is connected with signal output node A, and the signal output end OUT of the first chip U1 is for exporting triggering letter
Number, the ground terminal GND ground connection of the first chip U1.
Alarm unit 40 includes loudspeaker B and resistance R2, the first termination power vd D of resistance R2, the second end of resistance R2
It is connected with the first end of loudspeaker B, the second end of loudspeaker B is connected with control unit 30.
It is carried out specifically below in conjunction with working principle of the Fig. 3 and Fig. 4 to temperature alarming device 100 provided in this embodiment
It is bright.
Shown in Fig. 3, there are identical reference temperatures between positive temperature coefficient unit 11 and negative temperature coefficient unit 12, in week
Enclosing environment temperature is under the reference temperature, and the resistance value of positive temperature coefficient unit 11 and negative temperature coefficient unit 12 is infinity,
That is signal output node A output is low level.
When ambient temperature is greater than reference temperature, the resistance value of positive temperature coefficient unit 11 is still intended to infinity,
At this point, the resistance value of negative temperature coefficient unit 12 becomes smaller, and then direct current is exported by signal output node A.When ambient enviroment temperature
When degree is less than reference temperature, the resistance value of negative temperature coefficient unit 12 is still intended to infinity, at this point, positive temperature coefficient unit 11
Resistance value become smaller, and then by signal output node A export direct current.
Shown in Fig. 3 and Fig. 4, after direct current is exported by signal output node A, it is divided by divider resistance 20,
Temperature change signal is obtained, which flows into the enable end of the first chip U1, and then triggers the first chip U1 work,
And then power on the circuit between VDD, resistance R2, loudspeaker B and ground, pass through the signal output end OUT of the first chip U1
Trigger signal is exported to loudspeaker B, loudspeaker B is allowed to issue the sound according to the trigger signal.
A kind of temperature alarming device provided by the utility model is by temperature detecting unit in the temperature for detecting ambient enviroment
When degree variation is greater than preset threshold, DC signal is exported, DC signal is divided using divider resistance, to obtain temperature
Variable signal is spent, and by signal output node output temperature variable signal, then raw according to temperature change signal by control unit
At trigger signal, finally by alarm unit according to trigger signal issue sound, realize ambient enviroment temperature change no matter
It is to increase or reduce, as long as temperature change is greater than preset threshold, alarm can be realized, improves being applicable in for temperature alarming device
Range.
Unit in the utility model embodiment terminal can be combined, divided and deleted according to actual needs.
More than, only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto,
Anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in various equivalent
Modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, the utility model
Protection scope should be subject to the protection scope in claims.
Claims (9)
1. a kind of temperature alarming device, is connected with power supply unit, which is characterized in that the temperature alarming device includes:
Temperature detecting unit is connected with said supply unit, for being greater than default threshold in the temperature change for detecting ambient enviroment
When value, DC signal is exported；
Divider resistance is connected with the temperature detecting unit, forms signal output node, and the divider resistance is used for described straight
Galvanic electricity signal is divided, and to obtain temperature change signal, and is exported the temperature change by the signal output node and is believed
Number；
Control unit is connected with the signal output node, for generating trigger signal according to the temperature change signal；
Alarm unit is connected with described control unit, for issuing sound according to the trigger signal.
2. temperature alarming device as described in claim 1, which is characterized in that the temperature alarming device further include:
Display unit is connected with described control unit unit, for according to the temperature after display signal display variation；
Described control unit is also used to export the display signal according to the temperature change signal.
3. temperature alarming device as claimed in claim 1 or 2, which is characterized in that the temperature alarming device further include:
Wireless communication unit is connected with described control unit unit, for being sent according to the trigger signal to default host computer
Alarm signal.
4. temperature alarming device as described in claim 1, which is characterized in that the temperature detecting unit includes: positive temperature system
Counting unit and negative temperature coefficient unit；
The positive temperature coefficient unit is connected between said supply unit and the divider resistance, for the temperature in ambient enviroment
When degree is greater than the first preset temperature value, the first DC signal is exported, and in the temperature of ambient enviroment less than the second preset temperature
When value, open circuit is formed between the divider resistance；
The negative temperature coefficient unit is connected between said supply unit and the divider resistance, for the temperature in ambient enviroment
When degree is less than the second preset temperature value, the first DC signal is exported, and be greater than the first preset temperature in the temperature of ambient enviroment
When value, open circuit is formed between the divider resistance.
5. temperature alarming device as described in claim 1, which is characterized in that the temperature detecting unit includes thermocouple.
6. temperature alarming device as described in claim 1, which is characterized in that described control unit includes the first chip；
The power end of first chip is connected with power supply, the enable end of first chip and the signal output node phase
Even, the signal output end of first chip is for exporting the trigger signal, the ground terminal ground connection of first chip.
7. temperature alarming device as described in claim 1, which is characterized in that the alarm unit includes loudspeaker and resistance；
First termination power of the resistance, the second end of the resistance are connected with the first end of the loudspeaker, the loudspeaking
The second end of device is connected with described control unit.
8. temperature alarming device as claimed in claim 3, which is characterized in that the wireless communication unit includes WLAN
Unit, ZigBee protocol unit, global positioning system unit or cellular calls unit.
9. temperature alarming device as claimed in claim 8, which is characterized in that the cellular calls unit includes: 2G communication unit
Member, 3G telephony unit, 4G telephony unit or 5G telephony unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821134819.7U CN208505484U (en) | 2018-07-17 | 2018-07-17 | A kind of temperature alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821134819.7U CN208505484U (en) | 2018-07-17 | 2018-07-17 | A kind of temperature alarming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208505484U true CN208505484U (en) | 2019-02-15 |
Family
ID=65289466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821134819.7U Active CN208505484U (en) | 2018-07-17 | 2018-07-17 | A kind of temperature alarming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208505484U (en) |
-
2018
- 2018-07-17 CN CN201821134819.7U patent/CN208505484U/en active Active
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