CN102980671A - Temperature reminder for agricultural greenhouse - Google Patents
Temperature reminder for agricultural greenhouse Download PDFInfo
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- CN102980671A CN102980671A CN201210516650.2A CN201210516650A CN102980671A CN 102980671 A CN102980671 A CN 102980671A CN 201210516650 A CN201210516650 A CN 201210516650A CN 102980671 A CN102980671 A CN 102980671A
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Abstract
The invention discloses a temperature reminder for an agricultural greenhouse, which comprises a 6V direct current power supply, a temperature detection circuit, a three-grade temperature display circuit and a buzzer alarm circuit. The temperature reminder is characterized in that a light metering integrated circuit IC1 adopts an integrated circuit with a model number of ZH-3. The temperature reminder for the agricultural greenhouse provided by the invention adopts a negative temperature coefficient thermistor RT and the light metering integrated circuit ZH-3 as core elements; in an external circuit of the temperature reminder, a temperature sensor, that is, the negative temperature coefficient thermistor RT is skillfully adopted to replace a light metering photosensitive element, and a temperature sensor takes charge of sampling; temperature signals are processed by the integrated circuit ZH-3; when an environment temperature is increased or is lower, three-grade temperature variation of high, medium and low in a seedling raising shed is timely reflected through three LEDs (Light Emitting Diode) with different colors, and buzzer alarm is accompanied. And the temperature reminder is suitable for temperature detection in occasions, such as the agricultural greenhouse, a greenhouse and the like.
Description
Technical field
The invention belongs to Electronic Control and field of agricultural production technologies, relate to a kind of agricultural booth temperature-prompting device.
Background technology
Being everlasting in the rural area, being barricaded as the simple plastic booth cultivates various crops on the ground.The shortcoming of this hot house is that canopy temperature is difficult for discovering often, the normal growth that all affects crop too high or too low for temperature.The present invention is a agricultural three-level temperature detector, is responsible for the environment temperature sampling by the temperature sensor of negative temperature coefficient.Temperature signal is responsible for processing by integrated circuit ZH-3, when environment temperature raises or is on the low side, in time reflect the temperature variation of " high, medium and low " in the hot house by 3 different LED light emitting diodes of color, with buzzer warning sound, can be used for the temperature detection of the occasions such as booth, greenhouse simultaneously.
Agricultural three-level temperature detector of the present invention, with photometry integrated circuit ZH-3 as core parts, in its external circuit, use dexterously temperature sensor, that is: thermistor replaces the light activated element of photometry, and circuit has the characteristics such as structure is simple and direct, the components and parts consumption is few, circuit performance reliable, the making cost of development is low, easy to use, be easy to popularize.
Below describe agricultural booth temperature-prompting device of the present invention related correlation technique content in manufacturing process in detail.
Summary of the invention
Goal of the invention and beneficial effect: agricultural booth temperature-prompting device of the present invention, with negative tempperature coefficient thermistor RT and photometry integrated circuit ZH-3 as core parts, in its external circuit, use dexterously temperature sensor, that is: use negative tempperature coefficient thermistor RT to replace the light activated element of photometry, and be responsible for sampling by temperature sensor, temperature signal is responsible for processing by integrated circuit ZH-3, when environment temperature raises or is on the low side, by 3 different LED light emitting diodes of color in time reflect in the seedling culture shed " height; in; low " the third gear temperature variation, with buzzer warning sound, can be used for booth simultaneously, the temperature detection of the occasions such as greenhouse.
Technical characterictic: agricultural booth temperature-prompting device, it is comprised of 6V direct supply, temperature detection circuit, third gear temperature display circuit and buzzer alarm circuit, and its feature comprises:
Temperature detection circuit: it is by photometry integrated circuit (IC) 1, negative tempperature coefficient thermistor Rt, resistance R 1, resistance R 2, transwitch diode D1 and potentiometer RP form, the 2nd pin of photometry integrated circuit (IC) 1 connects the end of negative tempperature coefficient thermistor Rt, the 7th pin of photometry integrated circuit (IC) 1 connects the positive pole of transwitch diode D1, the negative pole connection circuit ground GND of the other end of negative tempperature coefficient thermistor Rt and transwitch diode D1, the end of the 4th pin connecting resistance R1 of photometry integrated circuit (IC) 1, the 5th pin of another termination photometry integrated circuit (IC) 1 of resistance R 1 and an end of resistance R 2, the other end connection circuit ground GND of resistance R 2,1 pin of photometry integrated circuit (IC) 1 connects the end of potentiometer RP, and the 14th pin of the other end of potentiometer RP and lever arm thereof and photometry integrated circuit (IC) 1 meets 6V dc power anode VCC;
It is ZH-3 that photometry integrated circuit (IC) 1 adopts the model of integrated circuit;
The third gear temperature display circuit: it is by photometry integrated circuit (IC) 1, LED 1 and transwitch diode D2, LED 2, LED 3 and transwitch diode D3 form, the negative pole of the negative pole of LED 1 and transwitch diode D2 connects the 11st pin of photometry integrated circuit (IC) 1, the positive pole of transwitch diode D2 links to each other with the positive pole of transwitch diode D3, the negative pole of LED 2 connects the 12nd pin of photometry integrated circuit (IC) 1, and the negative pole of the negative pole of LED 3 and transwitch diode D3 connects the 10th pin of photometry integrated circuit (IC) 1;
Warning circuit: it is comprised of PNP transistor VT1, resistance R 3, hummer HA, the base stage of PNP transistor VT1 connects the positive pole of transwitch diode D3 and the positive pole of transwitch diode D2 by resistance R 3, the emitter of PNP transistor VT1 meets 6V dc power anode VCC, the collector of PNP transistor VT1 connects the positive pole of hummer HA, the negative pole connection circuit ground GND of hummer HA.
The circuit working principle: agricultural booth temperature-prompting device is by temperature sensing and display circuit, audible alarm the electric circuit constitute; Temperature sensing and indicating circuit are comprised of elements such as camera photometering integrated circuit (IC) 1, temperature sensor (thermistor RT) and LED 1～LED3; The audible alarm circuit is comprised of elements such as PNP transistor VT1 and hummer HA.
RT is negative tempperature coefficient thermistor, is used for the acquisition environment temperature, and its resistance reduces along with the rising of temperature, and 2 pin voltages of photometry integrated circuit (IC) 1 change along with the change in resistance of thermistor RT.
Potentiometer RP is used for setting monitoring temperature, when environment temperature is suitable, 2 pin current potentials of photometry integrated circuit (IC) 1 are between high level and low level, the 12nd pin output low level of photometry integrated circuit (IC) 1, the 10th pin of photometry integrated circuit (IC) 1 and the 11st pin output high level, LED 2 is lighted, and LED 1 and LED3 are not luminous, and the hummer HA in the audible alarm circuit is sounding not.
When environment temperature is on the low side, the resistance of thermistor Rt increases, 2 pin voltages of photometry integrated circuit (IC) 1 are raise, when the 2nd pin of photometry integrated circuit (IC) 1 and the 5th pin become high level, the 11st pin of photometry integrated circuit and the 12nd pin are with output low level, LED 1 and LED 2 are lighted, transwitch diode D2 and positive-negative-positive silicon transistor VT1 conducting, hummer HA sends chimes of doom.
When environment temperature raises, the resistance of thermistor Rt reduces thereupon, make the 2nd pin voltage drop of photometry integrated circuit (IC) 1, when making the 2nd pin of photometry integrated circuit (IC) 1 and the 4th pin become low level, the 10th pin of photometry integrated circuit (IC) 1 and the 12nd pin output low level, LED 2 and LED 3 are lighted, and transwitch diode D3 and positive-negative-positive silicon transistor VT1 conducting make hummer HA get the electric chimes of doom that sends.
Description of drawings
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the invention provides an agricultural booth temperature-prompting device.
Embodiment
According to circuit working schematic diagram and the description of drawings shown in the accompanying drawing 1, and according in the described each several part circuit of summary of the invention between the components and parts annexation and components and parts technical parameter implement to realize the present invention.
The selection of components and parts and technical parameter thereof
IC1 is the photometry integrated circuit, and selecting model is ZH-3, and ZH-3 is for special-purpose photometry integrated circuit such as camera exposure meter and photometers, and the present invention is mainly used in identification and the processing of temperature-sensitive signal, and uses three condition LED display driver circuit wherein;
VT1 is PNP transistor, and model is selected 2CS8550;
D1～D3 is the transwitch diode, and model is all selected lN4148;
LED1～LED3 all selects the light emitting diode of ￠ 5mm, can select 3 kinds of different colours so that difference;
Rt is thermistor, requires to select the thermistor of negative temperature coefficient;
R1～R3 selects 1/4W metalfilmresistor or carbon resister; The resistance of resistance R 1 is 5.1K Ω, and the resistance of resistance R 2 is 20K Ω, and the resistance of resistance R 1 is 1.2K Ω;
RP is potentiometer, requires to select synthetic film precision linear potentiometer, and its resistance is 51K Ω;
HA is hummer, and operating voltage is 5～5.5V, requires to be built-in with the hummer of electronics sounding circuit.
Circuit production main points and circuit debugging
Fairly simple because of the circuit structure of agricultural booth temperature-prompting device, as long as the components and parts performance of using is intact, the physical connection of components and parts is correct generally speaking, and circuit of the present invention does not need to carry out any debugging and just can work;
Change the resistance of resistance R 1 and resistance R 2, can change the temperature monitoring scope, resistance R 1 is larger with the resistance value ratio of resistance R 2, and the scope of temperature detection is also larger.
Claims (1)
1. agricultural booth temperature-prompting device, it is comprised of 6V direct supply, temperature detection circuit, third gear temperature display circuit and buzzer alarm circuit, and its feature comprises:
Described temperature detection circuit is by photometry integrated circuit (IC) 1, negative tempperature coefficient thermistor Rt, resistance R 1, resistance R 2, transwitch diode D1 and potentiometer RP form, the 2nd pin of photometry integrated circuit (IC) 1 connects the end of negative tempperature coefficient thermistor Rt, the 7th pin of photometry integrated circuit (IC) 1 connects the positive pole of transwitch diode D1, the negative pole connection circuit ground GND of the other end of negative tempperature coefficient thermistor Rt and transwitch diode D1, the end of the 4th pin connecting resistance R1 of photometry integrated circuit (IC) 1, the 5th pin of another termination photometry integrated circuit (IC) 1 of resistance R 1 and an end of resistance R 2, the other end connection circuit ground GND of resistance R 2,1 pin of photometry integrated circuit (IC) 1 connects the end of potentiometer RP, and the 14th pin of the other end of potentiometer RP and lever arm thereof and photometry integrated circuit (IC) 1 meets 6V dc power anode VCC;
It is ZH-3 that described photometry integrated circuit (IC) 1 adopts the model of integrated circuit;
Described third gear temperature display circuit is by photometry integrated circuit (IC) 1, LED 1 and transwitch diode D2, LED 2, LED 3 and transwitch diode D3 form, the negative pole of the negative pole of LED 1 and transwitch diode D2 connects the 11st pin of photometry integrated circuit (IC) 1, the positive pole of transwitch diode D2 links to each other with the positive pole of transwitch diode D3, the negative pole of LED 2 connects the 12nd pin of photometry integrated circuit (IC) 1, and the negative pole of the negative pole of LED 3 and transwitch diode D3 connects the 10th pin of photometry integrated circuit (IC) 1;
Described warning circuit is comprised of PNP transistor VT1, resistance R 3, hummer HA, the base stage of PNP transistor VT1 connects the positive pole of transwitch diode D3 and the positive pole of transwitch diode D2 by resistance R 3, the emitter of PNP transistor VT1 meets 6V dc power anode VCC, the collector of PNP transistor VT1 connects the positive pole of hummer HA, the negative pole connection circuit ground GND of hummer HA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516650.2A CN102980671A (en) | 2012-12-05 | 2012-12-05 | Temperature reminder for agricultural greenhouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516650.2A CN102980671A (en) | 2012-12-05 | 2012-12-05 | Temperature reminder for agricultural greenhouse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102980671A true CN102980671A (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210516650.2A Withdrawn CN102980671A (en) | 2012-12-05 | 2012-12-05 | Temperature reminder for agricultural greenhouse |
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| Country | Link |
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| CN (1) | CN102980671A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931145A (en) * | 2015-06-30 | 2015-09-23 | 成都众山科技有限公司 | Temperature recorder with alarming function |
| CN106468921A (en) * | 2016-09-20 | 2017-03-01 | 深圳市奈士迪技术研发有限公司 | A kind of outdoor communication device for network communication engineering |
-
2012
- 2012-12-05 CN CN201210516650.2A patent/CN102980671A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931145A (en) * | 2015-06-30 | 2015-09-23 | 成都众山科技有限公司 | Temperature recorder with alarming function |
| CN106468921A (en) * | 2016-09-20 | 2017-03-01 | 深圳市奈士迪技术研发有限公司 | A kind of outdoor communication device for network communication engineering |
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Application publication date: 20130320 |