CN202058052U

CN202058052U - Vegetable greenhouse temperature control device

Info

Publication number: CN202058052U
Application number: CN201120126889XU
Authority: CN
Inventors: 燕居怀; 张明海; 吴庆海
Original assignee: SHANGDONG DAWANG VOCATIONAL COLLEGE
Current assignee: SHANGDONG DAWANG VOCATIONAL COLLEGE
Priority date: 2011-04-27
Filing date: 2011-04-27
Publication date: 2011-11-30
Anticipated expiration: 2021-04-27

Abstract

A vegetable greenhouse temperature control device comprises a single chip microcomputer circuit, a keyboard circuit, a sensor circuit, a display circuit, a drive circuit, a serial communication circuit and an alarm circuit, wherein the single chip microcomputer circuit is respectively connected with the keyboard circuit, the sensor circuit, the display circuit, the drive circuit, the serial communication circuit and the alarm circuit. Compared with the prior art, the vegetable greenhouse temperature control device as a closed-loop system has the advantages of 1 high operating stability, 2 high control accuracy and 3 high universality.

Description

The green house of vegetables temperature control equipment

Technical field

The utility model relates to a kind of temperature control equipment, is specifically related to a kind of green house of vegetables temperature control equipment.

Background technology

Realize that thermostatically controlled method has a lot, traditional PLC adaptive control heater strip that utilizes is realized thermostatic control, the thermostatic control that utilizes analog pid to regulate in addition, the conversion of need tabling look-up of its algorithm.The SCM Based control system of part is arranged at present, but have poor work stability more, defective that control accuracy is not high or deficiency.

The utility model content

The purpose of this utility model is exactly the defective that exists at prior art, provides a kind of and can accurately measure temperature, can realize the green house of vegetables temperature control equipment of temperature intelligent control again.

Its technical scheme is: comprise and single chip circuit, keyboard circuit, sensor circuit, display circuit, driving circuit, serial communication circuit and warning circuit.Described single chip circuit is connected with keyboard circuit, sensor circuit, display circuit, driving circuit, serial communication circuit and warning circuit respectively.

Unibus digital temperature sensor that described sensor electrical route model is DS18B20 and pull-up resistor are formed, 1 pin of temperature sensor is connected with power supply, 3 pin ground connection, 2 pin are connected with the P34 pin of single chip circuit, and 2 pin of temperature sensor are connected with pull-up resistor.Described driving circuit is made up of first resistance, second resistance, triode and solid-state relay, wherein an end of first resistance connects the P11 pin of single chip circuit, the other end is connected with the base stage of triode, the collector of triode is connected with the electrode input end of solid-state relay by second resistance, the negative input ground connection of solid-state relay, the emitter of triode connects power supply, and the output terminal of solid-state relay is connected on the power circuit of controlled device.Described serial communication circuit is the level transferring chip of MAX232CPE by model, first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity are formed, described first electric capacity is connected on 1 pin and 3 pin of level transferring chip, second electric capacity is connected on 4 pin and 5 pin of level transferring chip, the 3rd electric capacity is connected on 2 pin and 16 pin of level transferring chip, the 4th electric capacity is connected between 6 pin and ground wire of level transferring chip, 7 pin and 13 pin of level transferring chip are connected with communication interface, 10 pin of level transferring chip and the P30 of 12 pin and single chip circuit, the P31 pin is connected, 16 pin of level transferring chip are connected with power supply, 15 pin ground connection.

The utility model is a closed-loop system, and it has following advantage compared with prior art: 1, job stability height; 2, control accuracy height; 3, highly versatile.

Description of drawings

Fig. 1 is the circuit structure block diagram of a kind of embodiment of the utility model;

Fig. 2 is a sensor circuit schematic diagram among Fig. 1;

Fig. 3 is a driving circuit schematic diagram among Fig. 1;

Fig. 4 is a serial communication circuit schematic diagram among Fig. 1.

Embodiment

With reference to Fig. 1, a kind of green house of vegetables temperature control equipment comprises and single chip circuit 1, keyboard circuit 2, sensor circuit 3, display circuit 4, driving circuit 5, serial communication circuit 6 and warning circuit 7.Described single chip circuit 1 is connected with keyboard circuit 2, sensor circuit 3, display circuit 4, driving circuit 5, serial communication circuit 6 and warning circuit 7 respectively.

With reference to Fig. 2, described sensor circuit 3 is that unibus digital temperature sensor CGQ and the pull-up resistor R of DS18B20 forms by model, 1 pin of temperature sensor CGQ is connected with power Vcc, 3 pin ground connection GND, 2 pin are connected with the P34 pin of

single chip circuit

1, and 2 pin of temperature sensor CGQ are connected with pull-up resistor R.

With reference to Fig. 3, described driving circuit is made up of first resistance R 1, second resistance R 2, triode T and solid-state relay G, wherein an end of first resistance R 1 connects the P11 pin of single chip circuit 1, the other end is connected with the base stage of triode T, the collector of triode T is connected with the electrode input end of solid-state relay G by second resistance R 2, the negative input ground connection GND of solid-state relay G, the emitter of triode T connects power Vcc, and the output terminal of solid-state relay G is connected on the power circuit V of controlled device A.

With reference to Fig. 4, described serial communication circuit 6 is the level transferring chip ZH of MAX232CPE by model, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4 are formed, described first capacitor C 1 is connected on 1 pin and 3 pin of level transferring chip ZH, second capacitor C 2 is connected on 4 pin and 5 pin of level transferring chip ZH, the 3rd capacitor C 3 is connected on 2 pin and 16 pin of level transferring chip ZH, the 4th capacitor C 4 is connected between 6 pin and ground wire of level transferring chip ZH, 7 pin of level transferring chip ZH and 13 pin are connected with communication interface JK, the P30 of 10 pin of level transferring chip ZH and 12 pin and single chip circuit 1, the P31 pin is connected, 16 pin of level transferring chip ZH are connected with power Vcc, 15 pin ground connection GND.

In the utility model, single chip circuit 1, keyboard circuit 2, display circuit 4, driving circuit 5 and warning circuit 7 are the circuit that similar technician knows altogether, and its principle is no longer narrated at this.

Claims

1. green house of vegetables temperature control equipment, comprise and single chip circuit, keyboard circuit, sensor circuit, display circuit, driving circuit, serial communication circuit and warning circuit that it is characterized in that: described single chip circuit is connected with keyboard circuit, sensor circuit, display circuit, driving circuit, serial communication circuit and warning circuit respectively.

2. green house of vegetables temperature control equipment according to claim 1, it is characterized in that: unibus digital temperature sensor that described sensor electrical route model is DS18B20 and pull-up resistor are formed, 1 pin of temperature sensor is connected with power supply, 3 pin ground connection, 2 pin are connected with the P34 pin of single chip circuit, and 2 pin of temperature sensor are connected with pull-up resistor.

3. green house of vegetables temperature control equipment according to claim 1, it is characterized in that: described driving circuit is made up of first resistance, second resistance, triode and solid-state relay, wherein an end of first resistance connects the P11 pin of single chip circuit, the other end is connected with the base stage of triode, the collector of triode is connected with the electrode input end of solid-state relay by second resistance, the negative input ground connection of solid-state relay, the emitter of triode connects power supply, and the output terminal of solid-state relay is connected on the power circuit of controlled device.

4. green house of vegetables temperature control equipment according to claim 1, it is characterized in that: described serial communication circuit is the level transferring chip of MAX232CPE by model, first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity are formed, described first electric capacity is connected on 1 pin and 3 pin of level transferring chip, second electric capacity is connected on 4 pin and 5 pin of level transferring chip, the 3rd electric capacity is connected on 2 pin and 16 pin of level transferring chip, the 4th electric capacity is connected between 6 pin and ground wire of level transferring chip, 7 pin and 13 pin of level transferring chip are connected with communication interface, 10 pin of level transferring chip and the P30 of 12 pin and single chip circuit, the P31 pin is connected, 16 pin of level transferring chip are connected with power supply, 15 pin ground connection.