CN105607673A

CN105607673A - Intelligent temperature control system based on single chip microcomputer

Info

Publication number: CN105607673A
Application number: CN201510987045.7A
Authority: CN
Inventors: 黄东梅
Original assignee: Harbin Mimi Rice Industry Technology Co Ltd
Current assignee: Harbin Mimi Rice Industry Technology Co Ltd
Priority date: 2015-12-27
Filing date: 2015-12-27
Publication date: 2016-05-25

Abstract

An intelligent temperature control system based on a single chip microcomputer is designed in the invention. An MCS-51 single chip microcomputer and a temperature sensor are used to monitor temperature in real time, a highest temperature and a lowest temperature are set through a keyboard, and the collected real-time temperature is transmitted to a host machine through a serial port. Thus the control of the temperature is achieved. The hardware part of the system comprises a digital tube display, temperature setting buttons, a serial circuit, a PC host machine and a temperature sensor DS18B20. The software part of the system is divided into two parts: one part is set for temperature controlling in the form of buttons, and the other part is the displaying of a system working state by indication lamps. At first, the system carries out initialization setting on the single chip microcomputer, and the initialization setting comprises the initialization of a timer and the initialization of the serial port. The initialization setting of a peripheral circuit is needed in realizing the functions of the hardware circuit, the initialization setting comprises the initialization of a peripheral display circuit, setting temperature upper limit and low limit are initialized through judging the indication lamps, and real-time temperature is collected after a setting temperature is determined. Finally the transmission to the host machine is carried out through the serial port.

Description

SCM Based intelligent temperature control system

Technical field

The present invention relates to a kind of temperature control system, particularly a kind of employing 8051 monolithics are as the temperature control system of core.

Background technology

Single-chip microcomputer is the highest one of cost performance in all microprocessor, and along with the continuous increase of kind, function is constantly strengthened, and its application also expands rapidly. Single-chip microcomputer has suitable application at aspects such as intelligence instrument, control in real time, electromechanical integration, office machinery, household electrical appliance. Current, 8 single-chip microcomputers are mainly used in Industry Control, as the measurement of temperature, pressure, flow, metering and machining and control occasion; Dynamical 16 single-chip microcomputers (as MCS-96, MK-68200) can be used on more complicated computer network. Single-chip microcomputer is conducive to realize minimizing and singualtion of system control for controlling, simplify some special interface circuits, as the one-board micro-system of the special control processing capacity of the compositions such as program counter, phaselocked loop (PLL), analog switch, A/D and D/A converter, voltage comparator. Along with the develop rapidly of electronic technology, electronic control device is constantly towards miniaturization, intelligent direction development, reliability improves constantly simultaneously, single-chip microcomputer is the feature such as integrated level is high, function is strong, versatility is good, reliability is high, antijamming capability is strong, volume is little, easy to use and flexible owing to having, no matter be in national defense industry, communication sophisticated technology field, what still in intelligence instrument, civil electric appliance, all use is more and more. Can say, the application of microcomputer measuring and controlling technology has been penetrated into each department of national economy, and the application of microcomputer measuring and controlling technology is the effective way that product is improved the grade and weeded out the old and bring forth the new.

Because modern crafts more and more need to monitor and control real time temperature, and the precision needing is more and more higher. So the domestic and international many relevant personnel's of temperature control system attention, has obtained application very widely. Temperature control system not only can be used widely in industrial aspect, and in laboratory, office, is promoted in the intelligent buildings such as individual house. Temperature control system development is rapid, and achievement is remarkable.

Summary of the invention

The object of this invention is to provide a kind of 51 single-chip microcomputers that adopt, complete the slave computer part of temperature control system, realize the higher limit of design temperature, lower limit, and temperature is carried out to Real-time Collection, and be transferred to host computer to reach the object equipment that temperature is controlled by serial port.

The object of the present invention is achieved like this:

SCM Based intelligent temperature control system, is characterized in that: comprise 51 single chip machine controlling circuits, temperature setting circuits, temperature sensing circuit, display circuit and serial port circuit; Described temperature setting circuits, temperature sensing circuit, display circuit are connected with 51 single chip machine controlling circuits respectively, and control circuit is by serial port circuit and PC connecting communication.

The output of described temperature sensor is connected with the acquisition port of single-chip microcomputer, and the data of Ya～Yg port that the signal of single-chip microcomputer P0 mouth output is exported by CC4511 are directly connected to the input of 7 segment numeral pipes.

By P1.0, P1.1 and the P1.2 port of 3 Temperature Setting button control single chip computers, UP key connects P1.0 port; DOWN key connects P1.1 port; LED1, LED2 and LED3 receive respectively single-chip microcomputer P1.3, P1.4 and P1.5 port.

The present invention adopts MCS-51 single-chip microcomputer, and temperature sensor DS18B20, and temperature is carried out to Real-Time Monitoring and by by the maximum temperature of keyboard to set up, minimum temperature and the real time temperature collecting transmit to host computer by serial ports. To reach the control to temperature.

Hardware components temperature setting circuits, temperature sensing circuit, display circuit are connected with 51 single chip machine controlling circuits respectively, and control circuit is by serial line interface and PC connecting communication. The output of temperature sensor DS18B20 is connected with Chip Microcomputer A/D acquisition port, and the data of Ya～Yg port that the signal of single-chip microcomputer P0 mouth output is exported by CC4511 are directly connected to the input of 7 segment numeral pipes. By P1.0, P1.1 and the P1.2 port of 3 Temperature Setting button control single chip computers, UP key connects P1.0 port; DOWN key connects P1.1 port; LED1, LED2 and LED3 receive respectively single-chip microcomputer P1.3, P1.4 and P1.5 port.

Beneficial effect: the present invention has simple to operate, cost is low, easy to use, measures the advantages such as accurate.

Brief description of the drawings

Fig. 1 is system block diagram of the present invention.

Fig. 2 is software flow pattern of the present invention.

Detailed description of the invention

For example the present invention is described in more detail below in conjunction with accompanying drawing:

Embodiment 1

In conjunction with Fig. 1, Fig. 1 is system block diagram of the present invention. Invention adopts MCS-51 single-chip microcomputer, and temperature sensor DS18B20, and temperature is carried out to Real-Time Monitoring and by by the maximum temperature of keyboard to set up, minimum temperature and the real time temperature collecting transmit to host computer by serial ports. To reach the control to temperature.

Hardware components comprises that charactron shows, temperature arranges button, serial port circuit, PC host computer and temperature sensor DS18B20. Single-chip microcomputer work of the present invention and the needed DC voltage of a circuit module provide by DC-stabilized circuit. The main task of voltage-stabilized power supply is to convert the line voltage of 50Hz to stable voltage and current. Thereby, meeting a module needs in design, D.C. regulated power supply is generally made up of links such as rectification, filtering, voltage stabilizings. Whole reset circuit comprises the inside and outside two parts of chip. The Schmidt trigger (inhibition noise contributions) that external circuit generation reset signal enters in sheet by reset pin RST is connected with reset circuit in sheet again. The present invention selects as requested by key level reset circuit and completes, and after reset key, whole system is in init state. The main task of this module is that the signal charactron of single-chip microcomputer P0 mouth output is shown, and main devices used is CC4511 and 7 segment numeral pipes. The data of Ya～Yg port of CC4511 output are directly connected to the input of 7 segment numeral pipes, and CC4511 plays and becomes 7 segment numeral pipes to show the coding that numeral is required data transaction, and 7 segment numeral pipes play the effect that the data that receive are shown.

Embodiment 2

In conjunction with Fig. 2, Fig. 2 is software flow pattern of the present invention. Software section is divided into two parts: a part arranges with button form control temperature, and another part is with indicator lamp display system duty. Key part: by P1.0, P1.1 and the P1.2 port of 3 button control single chip computers, UP key connects P1.0 port, is used for adjustment System temperature to show, plays the show value effect that increases temperature. DOWN key connects P1.1 port, is used for equally adjustment System temperature to show, plays the show value effect that reduces temperature. OK key is to be used to provide the button of adjusting end signal. From circuit diagram, can see, each button is to need additional power source to provide signal by resistance, and in the time of button not, the input signal of port is high level (logical one), in the time that button presses down, and low level (logical zero) when the signal of input port. Indicator lamp part: LED1, LED2 and LED3 receive respectively single-chip microcomputer P1.3, P1.4 and P1.5 port, by the output of this three port of scm software control, when port output is logical one (high level), corresponding LED pipe is luminous, on the contrary, when port output be logical zero (low level), corresponding LED pipe extinguishes.

The flow process of whole software is that program starts to initialize setting to single-chip microcomputer, comprises the initialization of timer and the initialization of serial line interface. The function that realizes hardware circuit must initialize setting to peripheral circuit, comprising the initialization of peripheral display circuit, by judging indicator lamp initial setting up temperature upper limit and lower limit, determining after set temperature, real time temperature is gathered. Finally transmit to host computer by serial line interface.

Claims

1. SCM Based intelligent temperature control system, is characterized in that: comprise 51 single chip machine controlling circuits, temperature setting circuits, temperature sensing circuit, display circuit and serial port circuit; Described temperature setting circuits, temperature sensing circuit, display circuit are connected with 51 single chip machine controlling circuits respectively, and control circuit is by serial port circuit and PC connecting communication.

2. SCM Based intelligent temperature control system according to claim 1, it is characterized in that: the output of described temperature sensor is connected with the acquisition port of single-chip microcomputer, the data of Ya～Yg port that the signal of single-chip microcomputer P0 mouth output is exported by CC4511 are directly connected to the input of 7 segment numeral pipes.

3. SCM Based intelligent temperature control system according to claim 1, is characterized in that: by P1.0, P1.1 and the P1.2 port of 3 Temperature Setting button control single chip computers, UP key connects P1.0 port; DOWN key connects P1.1 port; LED1, LED2 and LED3 receive respectively single-chip microcomputer P1.3, P1.4 and P1.5 port.