CN212966481U - Wireless large-screen intelligent temperature detection alarm system - Google Patents
Wireless large-screen intelligent temperature detection alarm system Download PDFInfo
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- CN212966481U CN212966481U CN202021344772.4U CN202021344772U CN212966481U CN 212966481 U CN212966481 U CN 212966481U CN 202021344772 U CN202021344772 U CN 202021344772U CN 212966481 U CN212966481 U CN 212966481U
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Abstract
The utility model provides a wireless big screen intelligence temperature-detecting alarm system, it is including installing the temperature sensor T in big screen shell, temperature sensor T's collecting electrode respectively with the third resistance, first resistance one end is connected, the back power connection is connected with the 1 st foot of chip to the third resistance other end, first resistance is connected back and variable resistance RP with temperature sensor T, fifth resistance one end is connected, the fifth resistance other end respectively with fourth resistance one end, the 6 th foot of chip is connected, the 2 nd foot and the sixth resistance one end of chip are connected, the 3 rd foot and the second resistance one end of chip, be connected with the variable resistance RP other end after the sixth resistance other end is connected, second resistance other end ground connection, the 4 th foot of chip, the 5 th foot connects the alarm.
Description
Technical Field
The utility model belongs to the technical field of the intelligent control technique and specifically relates to indicate wireless large-size screen intelligence temperature detection alarm system.
Background
Traditional wireless large screen is when installing in outdoor or large-scale exhibition room, does not carry out temperature detection in the large screen, and circuit and inside components and parts produce high temperature easily when making use for a long time, cause the potential safety hazard.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough, provide a wireless large-size screen intelligence temperature detection alarm system.
In order to achieve the above object, the present invention provides a technical solution: wireless big screen intelligence temperature detection alarm system, it is including installing the temperature sensor T in big screen shell, temperature sensor T's collecting electrode respectively with the third resistance, first resistance one end is connected, the third resistance other end is connected the back with the 1 st foot of chip and is connected the power, first resistance is connected back and variable resistance RP with temperature sensor T, fifth resistance one end is connected, the fifth resistance other end respectively with fourth resistance one end, the 6 th foot of chip is connected, the 2 nd foot and the sixth resistance one end of chip are connected, the 3 rd foot and the second resistance one end of chip, the back is connected with the variable resistance RP other end to the sixth resistance other end, the second resistance other end ground connection, the 4 th foot of chip, the 5 th foot connects the alarm.
And the emitter of the temperature sensor T is connected with the other end of the first resistor and then grounded.
The other end of the fourth resistor is connected with a 7 th pin of the chip.
The utility model discloses after adopting above-mentioned scheme, adopt ordinary NPN transistor to do the temperature sensing element, its collecting electrode voltage Vc descends along with the rise of temperature, regard as comparator LCL 7665's input signal with this voltage, in normal temperature range, regulating circuit makes OUT1, OUT2 is the high level, when the temperature reachs the high temperature warning, it makes SET 2's voltage equal to 1.3V to adjust R1, OUT2 is the low level, when the temperature reaches the low temperature warning value, it makes SET1 end be 1.3V to adjust RP, OUT1 becomes the low level, therefore, no matter reach high temperature or when microthermal warning value, because OUT1, OUT2 carries OUT and connects, so can both send alarm signal, thereby report to the police through the alarm.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings, and the preferred embodiment of the present invention is: referring to fig. 1, the wireless large screen intelligent temperature detection alarm system described in this embodiment includes a temperature sensor T installed in a large screen housing, a collector of the temperature sensor T is connected to a third resistor R3 and one end of a first resistor R1, an emitter of the temperature sensor T is connected to the other end of a first resistor R1 and then grounded, the other end of the third resistor R3 is connected to a 1 st pin of a chip U1 and then connected to a power supply, the first resistor R1 is connected to the temperature sensor T and then connected to a variable resistor RP and one end of a fifth resistor R5, the other end of the fifth resistor R5 is connected to one end of a fourth resistor R4 and a 6 th pin of a chip U1, the other end of the fourth resistor R4 is connected to a 7 th pin of a chip U1, a 2 nd pin of the chip U1 is connected to one end of a sixth resistor R6, a 3 rd pin of the chip U1 is connected to one end of a second resistor R2 and the other end of a sixth resistor R6 and then connected, the other end of the second resistor R2 is grounded, and the 4 th pin and the 5 th pin of the chip U1 are connected with an alarm. After the scheme is adopted, a common NPN transistor is used as a temperature sensitive element, the voltage Vc of a collector of the NPN transistor is reduced along with the rise of temperature, the voltage is used as an input signal of a comparator LCL7665, an adjusting circuit enables OUT1 and OUT2 to be in a high level in a normal temperature range, when the temperature reaches a high-temperature alarm, R1 is adjusted to enable the voltage of SET2 to be equal to 1.3V and OUT2 to be in a low level, and when the temperature reaches a low-temperature alarm value, RP is adjusted to enable the end of SET1 to be 1.3V and OUT1 to be in a low level, so that no matter the alarm value of high temperature or low temperature is reached, an alarm signal can be sent OUT due to the fact that OUT1 and OUT2 are connected in parallel, and the alarm.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. Wireless big screen intelligence temperature detection alarm system, it is including installing temperature sensor (T) in big screen shell, its characterized in that: the collector of the temperature sensor (T) is respectively connected with a third resistor (R3) and one end of a first resistor (R1), the other end of the third resistor (R3) is connected with the 1 st pin of the chip (U1) and then connected with a power supply, the first resistor (R1) is connected with the temperature sensor (T) and then connected with a variable Resistor (RP) and one end of a fifth resistor (R5), the other end of the fifth resistor (R5) is respectively connected with one end of a fourth resistor (R4) and the 6 th pin of the chip (U1), the 2 nd pin of the chip (U1) is connected with one end of a sixth resistor (R6), the 3 rd pin of the chip (U1) is connected with one end of the second resistor (R2) and the other end of the sixth resistor (R6) and then connected with the other end of the variable Resistor (RP), the other end of the second resistor (R2) is grounded, and the 4 th pin and the 5 th pin of the chip (U1) are connected with an.
2. The wireless large-screen intelligent temperature detection alarm system according to claim 1, characterized in that: the emitter of the temperature sensor (T) is connected with the other end of the first resistor (R1) and then grounded.
3. The wireless large-screen intelligent temperature detection alarm system according to claim 1, characterized in that: the other end of the fourth resistor (R4) is connected with the 7 th pin of the chip (U1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021344772.4U CN212966481U (en) | 2020-07-10 | 2020-07-10 | Wireless large-screen intelligent temperature detection alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021344772.4U CN212966481U (en) | 2020-07-10 | 2020-07-10 | Wireless large-screen intelligent temperature detection alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212966481U true CN212966481U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021344772.4U Active CN212966481U (en) | 2020-07-10 | 2020-07-10 | Wireless large-screen intelligent temperature detection alarm system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212966481U (en) |
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2020
- 2020-07-10 CN CN202021344772.4U patent/CN212966481U/en active Active
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