CN202042874U

CN202042874U - Intelligent malignant load identification controller

Info

Publication number: CN202042874U
Application number: CN 201120084705
Authority: CN
Inventors: 刘辉; 周志英; 刘兵; 胡久松
Original assignee: Changsha University
Current assignee: Changsha University
Priority date: 2011-03-19
Filing date: 2011-03-19
Publication date: 2011-11-16
Anticipated expiration: 2021-03-19

Abstract

The utility model discloses an intelligent malignant load identification controller, which comprises a singlechip processing unit, a current signal extracting module, a voltage signal extracting module, a power supply module, a liquid crystal display module, a warning module, a press key input module and a relay control output module, wherein the current signal extracting module and the voltage signal extracting module convert load voltage and current into smalls signal voltage values, the output ends of the current signal extracting module and the voltage signal extracting module are connected to an analog-to-digital (A/D) converter arranged in the singlechip processing unit, and a singlechip carries out operation on received data, judges the load power dimension and the property and controls the action of a relay according to the load power dimension and the property. The intelligent malignant load identification controller can effectively identify high-power electric appliances which are easy to cause fire hazards in student apartments, and the use of the high-power electric appliances such as electrical bars, electric furnaces and the like is limited on the promise of ensuring the normal electricity use of students. The scientific and intelligent electricity consumption management on the student apartment is realized, and the life and property safety of college students is ensured.

Description

Pernicious load Intelligent Recognition controller

Technical field

The utility model relates to electronic device field, is specifically related to a kind of pernicious load Intelligent Recognition controller.

Background technology

The loadtype of student dormitory mainly contains non-linear rectified load (as computer, television set, charger), inductive load (as electric fan) and resistive load three classes such as (as immersion heater, electric furnaces).The high-power resistive load of immersion heater and so on is to cause the student dormitory leading cause of fire, and we are referred to as pernicious load.

In recent years, along with the continuous expansion of institution of higher learning's scale, number of student sharply rises, and many colleges and universities all carry out the logistics management socialization.Meanwhile, in a lot of college student apartments, the fire that uses pernicious load to cause begins to increase.In order to eliminate student dormitory Electrical Safety hidden danger, the human and material resources that related fields often will cost a lot of money go to check whether dormitory has used high-power electric appliance, but produce little effect.

The loadtype that student dormitory allows to use mainly is non-line rectification load, in the use of non-linear rectification load, detect the high-power pernicious load of input, guarantee under the prerequisite of the normal electricity consumption of student, the use of high-power electric appliances such as restriction immersion heater, electric furnace, realize the scientific and intelligent of the student dormitory management of power use, ensure that the fail safe of student's electricity consumption is the problem that presses for solution.

The utility model content

The utility model provides a kind of can monitor whether used the transgression for using electricity device in the student dormitory automatically, and can cut off the pernicious load Intelligent Recognition controller of dormitory power supply at once, fundamentally eliminate the phenomenon of in student dormitory, using forbidding electrical equipment, thereby eliminated Electrical Safety hidden danger, and the useful life of extending wire.

The technical solution adopted in the utility model is: this pernicious load Intelligent Recognition controller, comprise: the single-chip microcomputer processing unit, current signal extraction module, voltage signal extraction module, power module, LCD MODULE, alarm module, keyboard input module and relay control output module are that core connects with the single-chip microcomputer.

In the technique scheme, described power module provides DC power supply to controller, described current signal extraction module and voltage signal extraction module are the small signal value with load voltage and current conversion, and its output connects the A/D converter in the single-chip microcomputer processing unit.

In the technique scheme, the single-chip microcomputer processing unit is finished sampling, processing and the output control function of data, and the data that receive are carried out computing, judges bearing power size and character, the action that comes control relay according to the watt level and the character of load.

In the technique scheme, described single-chip microcomputer is the ATmega16 chip, and described LCD MODULE is the 2.4tft-pq of a Nokia color screen, shows the real-time numerical value of load current, voltage and power.

In the technique scheme, described voltage signal extraction module comprises voltage sensor and operational amplifier, described voltage sensor comprises former limit S1, S2 and secondary S3, S4, and former limit S1, S2 are connected in parallel on the load two ends, and secondary S3, S4 be the end of oppisite phase and the in-phase end of concatenation operation amplifier respectively.

In the technique scheme, described operational amplifier is the LM324 chip, and described voltage sensor is a HKCPT61CE type voltage transformer.

Technique effect of the present utility model is: adopt single-chip microcomputer processing unit, current signal extraction module, voltage signal extraction module and relay control module, pass through Intelligent Recognition, control the use of high-power pernicious load appliance effectively, simultaneously can allow safe electrical appliance such as electrical appliances such as water dispenser, computer normally to use again, thereby for student dormitory electricity consumption human-based management provides favourable equipment, realize the scientific and intelligent of the student dormitory management of power use, guarantee the undergraduate security of the lives and property.

The utility model is described in further detail below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is a system architecture diagram of the present utility model;

Fig. 2 is load current measuring circuit figure of the present utility model;

Fig. 3 is load voltage measuring circuit figure of the present utility model;

Fig. 4 is a relay output control module circuit diagram of the present utility model;

Fig. 5 is a LCD interface circuit diagram of the present utility model;

Fig. 6 is button input interface circuit figure of the present utility model;

Fig. 7 is a power circuit diagram of the present utility model.

Embodiment

Referring to Fig. 1, whole system is by the single-chip microcomputer processing unit, current signal extraction module, voltage signal extraction module, and power module, LCD MODULE, alarm module, keyboard input module and relay control output module constitute.Wherein power module provides DC power supply to controller, current signal extraction module and voltage signal extraction module extract the measurable small voltage signal of single-chip microcomputer, its output is connected to the A/D converter in the single-chip microcomputer processing unit, single-chip microcomputer carries out computing to the data that receive, draw the phase relation of bearing power size and electric current, voltage, judge the character of load, control the use of pernicious load by relay module effectively; Display module shows the real-time numerical value of load current, voltage and power; Fill the scope of being permitted (scope can be default by keyboard input module) when the power of electrical appliance has surpassed controller, alarm module can send alarm sound, and delays time and cut off user's the electric line of using after 1 minute.(can preset 3--5 minute) after spending a few minutes, controller closes automatically and uses electric line, recover electricity consumption, exceed the electrical appliance that allows power bracket and still be connected on the circuit if monitor once more, controller cuts off user's the electric line of using once more, when breaks surpass the permission number of times, just close no longer automatically.Need the keeper to input the control that password is removed controller.

Referring to Fig. 2, the current signal extraction module comprises current transformer and operational amplifier, S1, S2 and S3, S4 are respectively the former limit and the secondary of current transformer, in the centre bore of current transformer, wear a circle bus (P1-P2) as input, module output voltage U out=I2*R1, the PA1 pin of this voltage signal input single-chip microcomputer carries out the A/D conversion;

Referring to Fig. 3, the voltage signal extraction module comprises voltage transformer and operational amplifier, and mutual induction of voltage comprises former limit S1, S2 and secondary S3, S4, and former limit S1, S2 are connected in parallel on the load two ends, and secondary S3, S4 be the end of oppisite phase and the in-phase end of concatenation operation amplifier respectively.Module output voltage U out=I2*R1, the PA0 pin of this voltage signal input single-chip microcomputer carries out the A/D conversion;

Referring to Fig. 4, when one-chip machine port PD0 output low level, the lumination of light emitting diode of photoelectrical coupler TIL117, make the phototriode saturation conduction, and then triode 9013 saturation conductions of driving action have been made, so it is electric that relay coil J gets, the make contact J1-1 closure of relay, thus make the load energising; When PD0 output high level, situation is opposite with the front.

Referring to Fig. 5, PB0～PB7 of single chip computer AT MEGA16 adopts the parallel interface mode to be connected with the data wire of LCD DB0～DB7; LCD control line: RES, CS, RD, WR, RS receive the PD3～PD7 of single-chip microcomputer respectively.The function of each control line is as follows:

RES is the LCD reseting signal line, and LCD resets when being changed to low level;

RS is the data/commands control line: 0 for transmitting control command, and 1 for transmitting data;

CS is a sheet choosing end, and low level is effective; RD is a read signal, and low level is effective;

WR is a write signal, and low level is effective;

LED is LCD background light control mouthful line, and background light is bright when being provided as high level;

Single-chip microcomputer mainly comprises read operation and write operation to the control of LCD.

Referring to Fig. 6, system is provided with 4 touch-keys, is used for inputing the bearing power of password and conditioning controller permission, after single-chip microcomputer is given the PC0 high level, drag down immediately, begin to start the timer conter counting when PC1 detects high level, detect low level and stop counting.If do not have the electric capacity of human body to exist (human body does not contact button), the count value of timer conter is very little; If human body has contacted button, PC1 detects low level time lengthening, and the count value of timer conter increases.Single-chip microcomputer is pressed according to big few key that judged whether of count value.

Referring to Fig. 7, the alternating voltage of 220V/50HZ is converted into 18V by transformer, insert electric bridge then and carry out rectification.By electric capacity, the circuit that integrated regulator 7812,7805 and ASM1117 form carries out filtering and voltage stabilizing, controlled device needs+12V ,+5V and+the 3V direct voltage.

Claims

1. pernicious load Intelligent Recognition controller, comprise the single-chip microcomputer processing unit, current signal extraction module, voltage signal extraction module, power module, LCD MODULE, alarm module, keyboard input module and relay control output module, it is characterized in that: described power module provides DC power supply to controller; Current signal extraction module and voltage signal extraction module are the small signal value with load voltage and current conversion, and its output connects the A/D converter in the single-chip microcomputer processing unit; Single-chip microcomputer carries out computing to the data that receive, and judges bearing power size and character, the action that comes control relay according to the watt level and the character of load.

2. pernicious load Intelligent Recognition controller according to claim 1, it is characterized in that: described voltage signal extraction module comprises voltage sensor and operational amplifier, described voltage sensor comprises former limit S1, S2 and secondary S3, S4, former limit S1, S2 are connected in parallel on the load two ends, and secondary S3, S4 be the end of oppisite phase and the in-phase end of concatenation operation amplifier respectively.

3. pernicious load Intelligent Recognition controller according to claim 1, it is characterized in that: described single-chip microcomputer is the ATmega16 chip, described LCD MODULE is the 2.4tft-pq of a Nokia color screen.

4. pernicious load Intelligent Recognition controller according to claim 2, it is characterized in that: described operational amplifier is the LM324 chip, described voltage sensor is a HKCPT61CE type voltage transformer.