CN201903796U - Intelligent fuzzy constant temperature controller - Google Patents

Abstract

The utility model discloses an intelligent fuzzy constant temperature controller which mainly consists of a temperature sensor, a 5V power supply circuit, a load control circuit, keys, a singlechip microcomputer LED (Light-Emitting Diode) digital display, wherein the temperature sensor is arranged at a load part and transmits a collected actual temperature value to a singlechip microcomputer; the singlechip microcomputer carries out operation processing on collected data and then automatically controls a pin (P3.5) of the singlechip microcomputer to output a high/low level; the saturated on or off state of a field-effect transistor (Q11) is controlled through controlling the on state or the off state of a triode inside an optoelectronic coupler (U2), so that the on and off states of a load circuit are controlled and the purpose of automatically controlling the temperature of a point to be tested is achieved; and meanwhile an LED (light-emitting diode) digital display (M1M4) is driven to display temperature and time values. The temperature control is realized in the manner of fuzzy temperature control through the adjusting of the brightness of a heat lamp, therefore, fire injuries caused by overhigh temperature is avoided. The intelligent fuzzy constant temperature controller has the characteristics of low cost and high reliability and is convenient to operate.

Description

The intelligent fuzzy radiator valve

Technical field

The utility model belongs to technical field of medical instruments, is a kind of intelligent fuzzy radiator valve specifically.Can carry out automatic constant-temperature, self-timing control to the resistive heating load of low voltage operatings such as Radiation lamp for medical use, electromagnetic wave curing instrument, far infrared therapeutic apparatus.

Background technology

At present, clinical employing far infrared wave, specific electromagnetic wave act on the human body subcutaneous deep tissues, give birth to thermal effect in can producing effectively, thereby impel blood vessel dilatation, volume of blood flow speeds, and improves the histocyte circulation, improve blood supply oxygen delivery capacity and metabolism, strengthen the repair ability of histoorgan, regulate the unbalance of body, reach the purpose of curing the disease.The therapy of employing light-wave irradiation has significant curative effect for the healing and the diseases such as reparation and soft tissue injury of open wound face, had clinically and used comparatively widely and promote, in recent years, small-sized light wave thermotherapy quasi-instruments such as many far infrared therapeutic apparatus, special electromagnetic therapeutic apparatus arise at the historic moment.Yet this kind equipment of making a general survey of on the market mostly can not carry out thermostatic control to the temperature at the illuminated position of body surface, if be radiated at same position for a long time, and can be because heating load persistently overheating and human body caused burn.

Summary of the invention

The purpose of this utility model is to overcome the deficiency that existing medical light wave thermotherapy quasi-instrument exists, and proposes a kind of intelligent fuzzy radiator valve.Realize temperature control by the fuzzy temperature control method of regulating roasting lamp brightness, make the clinician that more accurate quantification reference index arranged when implementing therapeutic scheme, the user feels more comfortable when treatment, can avoid too high the burning of causing of temperature.Have easy to operate, with low cost, high reliability features.

The utility model realizes that the technical scheme that above-mentioned purpose is taked is: it is mainly by temperature sensor, the 5V power circuit, load control circuit, button, single-chip microcomputer, the LED nixie display constitutes, temperature sensor is arranged on the load position, it sends the actual temperature value that collects to single-chip microcomputer, single-chip microcomputer is exported high/low level with the data that collect through the P3.5 pin of automatic control single chip computer after the calculation process, conducting by the inner triode of control photoelectrical coupler or end and control field effect transistor and be in saturation conduction or cut-off state, thereby controlled opening and turn-offing of load circuit, the driving LED nixie display is shown the temperature and time value simultaneously.

The utility model adopts advanced fuzzy temperature control method, and its temperature control is effective, and temperature-controlled precision can reach ± and 1 ℃, the user feels more comfortable when treatment, can avoid too high the burning of causing of temperature.The earth leakage protective device that is provided with can prevent effectively that unexpected electric leakage from damaging human body.Have reasonable in design, easy to use, antijamming capability is strong, working stability, contactless, long service life, transfer efficiency height, the characteristics that production cost is low.

Description of drawings

Fig. 1 is the utility model electrical schematic diagram

Embodiment

In conjunction with the accompanying drawings, as follows to the utility model embodiment:

As shown in Figure 1: present embodiment mainly is made of temperature sensor, 5V power circuit, load control circuit B2, R14, R15, Q11, U2, R16, R21, button S1-S4, single chip computer AT 89C51, LED nixie display etc.In order to keep whole therapeutic equipment one integrated mass, it is DS18B20 that temperature sensor is selected model for use, this sensor temperature-measuring range is-55～+ 125 ℃, intrinsic thermometric resolution is 0.5 ℃, during use without any need for peripheral cell, only need a Tiaokou line can realize with microprocessor between two-wayly be connected communication.This temperature sensor is fixed on the exit of roasting lamp lampshade, cover by therapentic part with lampshade during owing to treatment, so the temperature that this temperature sensor measures is very approaching by the shell temperature of therapentic part.Circuit inserts through the alternating current 220V civil power, and live wire is connected the power switch S1 of tape light earlier again through protective tube F1.The bridge rectifier circuit B2 of leading up to becomes the 220V alternating current into direct current and gives load (bulb or far infrared heater) power supply.The R14 of control circuit and R15 are divider resistance, and Q11 provides operating voltage for field effect transistor.When P3.5 is low level, the be triggered conducting and luminous of the light emitting diode of photoelectrical coupler U2, this moment photoelectrical coupler U2 the triode conducting, the source electrode of field effect transistor Q11 does not have voltage, so Q11 ends, load does not constitute the loop.Otherwise, when P3.5 is high level, Q11 conducting, load operate as normal.The high-low level state of P3.5 is by Single-chip Controlling, the time of concrete hold mode is controlled according to the deviation size of temperature value that collects and setting value automatically by software, when the deviation that temperature and observed temperature are set during less than 5 ℃, controller enters fuzzy temperature control state automatically, high-low level time ratio by programmed control P1.5 in 1ms is divided into a plurality of fringes, bulb can not extinguish in therapeutic process like this, realize temperature control by the brightness of regulating bulb, its temperature control is effective, and temperature-controlled precision can reach ± and 1 ℃.Another road is by the 9V transformer, convert the dc low-voltage electricity to by rectifier bridge B1 again,, be stabilized in 5V through three terminal regulator Q12 again through electrochemical capacitor E2 and leaded multilayer ceramic capacitor C5 filtering, again through electrochemical capacitor E3 and leaded multilayer ceramic capacitor C4 filtering clutter, just can obtain one constant and do not have a 5V power supply of clutter.S1, S2, S3, S4 be respectively " put temperature-", " put temperature+", " when putting-, " when putting+" button, input inserts the P1 mouth of single chip computer AT 89C51 as switching value, the user can press correspondent button according to the treatment demand suitable treatment temperature and time is set.E1 is a decoupling capacitor, automatically resets after single-chip microcomputer powers on, and is shown as the initial temperature and the time set value of acquiescence.J is a connector socket, is used for external temperature sensor DS18B20.Y1 is a quartz oscillator, and its oscillation frequency is 12MHz, and the machine cycle of single-chip microcomputer is 1ms.Single-chip microcomputer is as control core of the present utility model, selecting model for use is AT89C51, be 8 single-chip microcomputer sheets of low-voltage, high-performance that American ATMEL is produced include 4KB can be erasable repeatedly read-only program memory (EPROM) and the Random Access Data storer (RAM) of 128KB, cheap, powerful.Because the filling current capacity of AT89C51P mouth is strong, generally can reach 20mA, therefore can directly drive the LED nixie display M1-M4 of common anode.In order to simplify hardware circuit, nixie display adopts the display packing of dynamic scan, the font that the control of P0 mouth shows, the common port COM of each display is controlled by the P2 mouth, be used for selecting which display work, under the control of two groups of signals, can bright each a display demonstration of land wheel flow point number separately.In lighting one time process in turn, every time compole short (1～5ms) that display is lighted.Because LED nixie display M1-M4 has the inertia of persistence characteristic and human eye vision, the eye impressions of giving human eye are to show that continuously and stably not discovering has scintillation.H is a hummer, and by the P1.5 control of single-chip microcomputer, when P1.5 was low level, triode Q7 ended, and hummer does not ring; When P1.5 is high level, the Q7 saturation conduction, hummer H work, it is specifically worked and is controlled by the software program of single-chip microcomputer constantly, generally warning reminding when treatment end or single-chip microcomputer operation irregularity.P1.4 and P1.6 control LED 1 and LED2 respectively simultaneously, and LED1 is a relay indicating light, and therapeutic equipment is worked just bright at the beginning; LED2 is an alarm lamp, and is bright during warning.

Claims (5)

1. intelligent fuzzy radiator valve, it is characterized in that: it is mainly by temperature sensor DS18B20,5V power circuit (T1, B1, E2, C5, Q12, E3, C4), load control circuit (B2, R14, R15, Q11, U2, R16, R21), button (S1-S4), single chip computer AT 89C51, LED nixie display (M1-M4) constitutes, temperature sensor is arranged on the load position, it sends the actual temperature value that collects to single-chip microcomputer, single-chip microcomputer is exported high/low level with the data that collect through the P3.5 pin of automatic control single chip computer after the calculation process, conducting by control photoelectrical coupler (U2) inner triode or end and control field effect transistor (Q11) and be in saturation conduction or cut-off state, thereby controlled opening and turn-offing of load circuit, driving LED nixie display (M1-M4) is shown the temperature and time value simultaneously.

2. intelligent fuzzy radiator valve according to claim 1, it is characterized in that: the high-low level state of the P3.5 pin of described single-chip microcomputer is by Single-chip Controlling, when the deviation that temperature and observed temperature are set during less than 5 ℃, controller enters fuzzy temperature control state automatically, and the high-low level time ratio by programmed control P3.5 pin in 1ms is divided into a plurality of fringes.

3. intelligent fuzzy radiator valve according to claim 1 is characterized in that: be provided with hummer (H), by the P1.5 pin control of single-chip microcomputer.

4. intelligent fuzzy radiator valve according to claim 1 is characterized in that: be provided with relay indicating light, LED 1 is by the P1.4 pin control of single-chip microcomputer.

5. intelligent fuzzy radiator valve according to claim 1 is characterized in that: be provided with alarm lamp, LED 2 is by the P1.6 pin control of single-chip microcomputer.