CN105758529B - A kind of safety monitoring device based on non-contact temperature detection - Google Patents
A kind of safety monitoring device based on non-contact temperature detection Download PDFInfo
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- CN105758529B CN105758529B CN201610293067.8A CN201610293067A CN105758529B CN 105758529 B CN105758529 B CN 105758529B CN 201610293067 A CN201610293067 A CN 201610293067A CN 105758529 B CN105758529 B CN 105758529B
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- 238000012544 monitoring process Methods 0.000 description 3
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- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0003—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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Abstract
The invention discloses a kind of safety monitoring devices based on non-contact temperature detection, including control box (1), infrared temperature sensor (3) and connector；The termination control box of connector one, the end of the other end is provided with the infrared temperature sensor；Infrared temperature sensor is used for the outside wall temperature of detection container (9)；It controls and is equipped with control circuit and alarm in box；If the temperature value of infrared temperature sensor detection is higher than preset value, alarm signal is issued by control circuit；Temperature preset value is any value in 140~180 DEG C；The connector is flexible steel in flat section tubing (2), the direction of energy freedom and flexible modulation infrared temperature sensor, should be skillfully constructed based on the safety monitoring device that non-contact temperature detects, is easy to implement, and can effectively prevent the containers dry combustion method such as pot or furnace, high sensitivity, it is highly-safe.
Description
Technical field
The present invention relates to a kind of safety monitoring devices based on non-contact temperature detection.
Background technique
Existing monitoring device for kitchen use mostly uses temperature sensor to detect indoor temperature, and uses infrared induction
Whether someone is in kitchen for device induction, and such as Chinese patent of Publication No. 201269558 discloses a kind of fiery peace of kitchen gas stove
(application number: 200820014489.8), including temperature relay RJ1, human body sensing heat release infrared sensor, nothing to full informing device
Line electricity emission system, multiple radio reception informing devices and intelligent gas valve, temperature relay RJ1 are mounted on gas-cooker
Near stove disk holder；Temperature relay RJ1 and human body sensing heat release infrared sensor, intelligent gas valve, radio transmitting system
System and power electric connection form gas monitor and control system；Multiple radio reception informing devices are respectively and fixedly installed to parlor, crouch
Indoor or physical activity is worn, and composition combustion gas situation reminds informing system.When fire for kitchen use, people are once left, if being more than to set
It fixes time, the machine will trigger radio reception informing device by way of radio, and radio reception informing device can term
Speech prompt user is noted that, returns to kitchen until user and is released by human body sensing heat until infrared sensor detects.This
Although kind of fire security alarming apparatus of kitchen gas range is provided with temperature relay, still, this temperature relay sensitivity compared with
Difference can not accurately incude furnace body with the presence or absence of dry combustion method, therefore, this kitchen due to being arranged near gas-cooker stove disk holder
The practicability of the safe informing device of gas-cooker fire is had a greatly reduced quality.
In addition, there is also the hidden danger that the containers dry combustion method such as beaker causes the accident in chemical laboratory.
Therefore, it is necessary to design a kind of higher safety monitoring device of sensitivity.
Summary of the invention
Technical problem to be solved by the invention is to provide it is a kind of based on non-contact temperature detection safety monitoring device,
The safety monitoring device based on non-contact temperature detection is skillfully constructed, is easy to implement, can effectively prevent the containers such as pot or furnace
Dry combustion method, high sensitivity are highly-safe.
The technical solution of invention is as follows:
A kind of safety monitoring device based on non-contact temperature detection, including control box, infrared temperature sensor and company
Fitting；The termination control box of connector one, the end of the other end is provided with the infrared temperature sensor；
Infrared temperature sensor is used for the outside wall temperature of detection container；The container is the burning placed on the heating
Cup, pot or furnace；Heating device is gas-cooker or micro-wave oven etc..
It controls and is equipped with control circuit and alarm in box；Infrared temperature sensor is connected with the input terminal of control circuit, control
Comparator unit is equipped in circuit processed, comparator unit is used to compare the temperature of infrared temperature sensor detection and temperature is preset
Value issues alarm signal by control circuit if the temperature value of infrared temperature sensor detection is higher than preset value；
Temperature preset value is the temperature value of container outer wall when the liquid in container is dryouied.
The connector is flexible steel in flat section tubing, the direction of energy freedom and flexible modulation infrared temperature sensor.
Alarm includes at least one of buzzer, loudspeaker and wireless alarm signal output module, radio alarming letter
For exporting wireless alarm signal to intelligent terminal, the intelligent terminal is mobile phone, tablet computer or access for number output module
To the PC terminal or laptop of internet or local area network.
The wireless alarm signal output module is bluetooth module, in WiFi module, GSM, 3G or 4G communication module
It is at least one.
Safety monitoring device based on non-contact temperature detection further includes the gas for controlling the gas supply of gas-cooker
Valve, the air valve are controlled by the alarm signal.
At least one alarm clock and the signal input apparatus for alarm time to be arranged are provided in control box.
It controls box and is equipped with display screen, the signal input apparatus is code switch.Display screen can be touch display
Screen is then not necessarily to code switch；Preferably, air valve is also controlled by time arriving signal (the i.e. timing output letter of alarm clock output
Number), it is preferable that alarm clock and code switch are 3.
Safety monitoring device based on non-contact temperature detection further includes that the imflammable gas being connected with control circuit passes
Sensor, when control circuit detects that combustable gas concentration is more than the default density by combustible gas sensor, starting alarm
Device.
Temperature preset value is any value in 140~180 DEG C；This digital scope is that the present invention applies the correspondence at kitchen
Temperature range, when being used in the occasions such as chemical laboratory, need to carry out after dry combustion method measurement temperature preset value again.
The control circuit is analog control circuit or digital control circuit.Analog control circuit includes that simulation is compared
Device, digital control circuit include digital comparator, when necessary further include A/D converter.Digital control circuit is single-chip microcontroller, DSP
Or arm processor.
Temperature preset value is 150 DEG C or 160 DEG C；
Alarm includes buzzer, loudspeaker and wireless alarm signal output module, and wireless alarm signal output module is used
In output wireless alarm signal to intelligent terminal, the intelligent terminal is mobile phone, tablet computer or is linked into internet or office
The PC terminal or laptop of domain net；
The wireless alarm signal output module includes bluetooth module, WiFi module, GSM, 3G or 4G communication module；
Safety monitoring device further includes the air valve for controlling the gas supply of gas-cooker, and the air valve is controlled by described
Alarm signal；
Control 3 code switch in box at least provided with 3 alarm clocks and for alarm time to be arranged；
It controls box and is equipped with display screen, air valve can also be controlled by the time arriving signal of alarm clock output；
The safety monitoring device further includes the combustible gas sensor being connected with control circuit, and control circuit passes through
When combustible gas sensor detects that combustable gas concentration is more than the default density, start alarm；
The control circuit is single-chip microcontroller, DSP or arm processor.
Infrared temperature sensor is also possible to infrared camera.
Infrared temperature sensor uses relatively inexpensive infrared temperature sensor MLX90614.
The design of the dry combustion method judgement of pot of the invention is derived from life: when cooking, with the extension of heating time, temperature
Degree can slowly rise, but if having moisture in pot, temperature can be at 110 DEG C hereinafter, people will not allow temperature liter in operation
Get Tai Gao, because dish can be burnt out after temperature is too high, and after moisture content dryouies, if without artificially closing fiery cooling, temperature can be with
The extension of time and continue to increase, until burn it is red or even on fire.According to this process and principle, it is only necessary to the temperature of pot is detected,
Whether the length of binding time is it may determine that take the dish out of the pot in dry-fire condition.
Common temperature sensor is contact, such as semiconductor temperature sensor DS18B20, thermocouple, platinum resistance etc.
It requires to contact sensor with testee, can just measure temperature.Although contact temperature-measuring is reliable, price is low, is used in kitchen
Room is inconvenient, because circuit part cannot be used in high temperature applicationss, and circuit can not be fixed on pot.Another party
Temperature sensor is fixed on bowl by face since pot is during use always in movement, using the side of conducting wire connection circuit
Formula is also infeasible.So the scheme of contact type temperature sensor cannot be used.
Therefore, it is necessary to use non-contact temperature sensor, infrared thermal imaging and infrared temperature sensor are most normal at present
Method.Usual object can all issue infrared ray, and when the temperature of object is higher than ambient temperature obtains more, infra-red radiation is got over
Greatly, if be filmed infrared ray using infrared camera, so that it may see different brightness, the higher table of brightness in the picture
Temperature displaying function is higher, this is the method that military infrared viewing device uses, and can reflect the profiling temperatures in an angular field of view,
Information is comprehensive, reliable operation, but usually price is very high, and the price of an infrared camera arrives hundreds of thousands member tens of thousands of, for
Cost consideration is not suitable for kitchen or common laboratory and uses.Infrared temperature sensor is sensed using relatively inexpensive infrared temperature
Device MLX90614, it is a general infrared measurement of temperature module.The module has been verified and has been linearized before factory, is had non-
The advantages that contact, small in size, precision is high, at low cost.Measured target temperature and environment temperature can be exported by digital signal, can be with
Directly and interface microcontroller, it is suitable for air conditioning for automobiles, room heater, household electrical appliance, handheld device and medical device applications etc..
When using this sensor temperature, it is desirable that sensor must be directed at testee, and the present invention is exactly to be opened from the lamp stand of desk lamp
Hair, devises mounting bracket of the metal hose as temperature sensor.User only needs simply to adjust when in use in this way
Whole hose, the bowl for allowing temperature sensor alignment to generate heat, since temperature sensor thermometric region is a fan-shaped region,
It is substantially aligned with just, this has been considerably improved the ease for use of this equipment.
In order to detect the dry-fire condition of pot, common many kinds of pan: frying pan, pressure cooker, common stainless steel kettle is tested.
The detection of the temperature of pot is related with the opposite position of sensor, when sensor faces the interface portion of flame and the bottom of a pan and following
When, temperature can be up to 260 DEG C or more, but if slightly up, when sensor device being allowed to face pot body, temperature is under non-dry-fire condition
130 DEG C are not exceeded, after the water in pot dryouies, then temperature is begun to ramp up, and when test, if temperature reaches 260 DEG C, pot is
It is rubescent.By repetition test, by the centre of temperature sensor alignment pot, (fireless part finds temperature when no dry combustion method
Mostly at 100 DEG C hereinafter, a few cases to not being not more than very much 120 DEG C on time) when, by dry combustion method temperature setting in 150-
180 DEG C (preferably 160 DEG C) can feasibly detect the dry combustion method of pans for use in kitchen very much, and gas-cooker is in safe combustion shape at this time
State, so the default value (preferred value) of temperature alarming is arranged at 160 DEG C the present invention.In order to adapt to the needs of a small number of occasions, report
The setting value of alert temperature has been designed to can adjust, and user can arbitrarily adjust between 0-255 DEG C, but again will after turning back on
Restore 160 DEG C of default value.
The utility model has the advantages that
Safety monitoring device based on non-contact temperature detection of the invention, with the following functions:
(1) security monitoring can carry out safely full-time monitoring to occasions such as kitchen or laboratories, be furnished with combustible gas alarm
And infrared temperature sensor, when in kitchen or laboratory fuel gas (mainly being caused by gas leakage) be more than a certain concentration or
The temperature of pot can sound an alarm when being more than 160 DEG C, which cuts off a switch simultaneously, can be used for cutting off the gas of gas-cooker
Source.
Core of the invention feature is the thermometric mode using infrared temperature sensor complexed metal hose, soft by metal
Adjustable infrared temperature sensor alignment position is managed, and originally by checking that furnace body outer wall temperature realizes dry combustion method report
Alert, high sensitivity is highly-safe.
(2) alarm clock function has three independent alarm clocks, all using sound-light alarm mode, easy to operate, intuitive display,
It is suitble to family kitchen to be especially suitable for the elderly to use.
(3) it connects smart phone: being connect by bluetooth or other wireless modes with user's smart phone, timer time arrives
Either safety alarm when all can remind user by mobile phone or other terminals in time, with convenient for users to understanding live shape in time
State avoids safety accident.
(4) one of alarm clock can be connect with accessory power outlet, can in alarm time then disconnecting power switch immediately,
This function is particularly practical in kitchen or laboratory.
To sum up, the present invention uses the temperature of infrared Infrared Technique detection container, and sentence whether container is in
Dry-fire condition, if it is, alarm, while there is gas leakage warning function；4 alarm clocks can be set simultaneously, it is easy to operate,
Intuitive display, the suitable family kitchen of spy and laboratory use, and are especially suitable for the not so good the elderly of family memory and use.It will
Warning message is shown on intelligent terminal by wireless technology, and the peace at scene can be easily monitored in the terminals such as mobile phone
Full situation.
In conclusion this safety monitoring device based on non-contact temperature detection is skillfully constructed, and it is feature-rich, it is sensitive
Degree is high, can monitor in real time to fiery scene, highly-safe.
Detailed description of the invention
Fig. 1 is the schematic diagram when safety monitoring device detected based on non-contact temperature is used.
Fig. 2 is the electric functional block diagram of safety monitoring device.
Fig. 3 is main program flow chart；
Fig. 4 is timer interrupt program flow chart；
Fig. 5 is runs status routine flow chart.
Label declaration: 1- controls box, 2- flexible steel in flat section tubing, 3- infrared temperature sensor, 4 display screens, 5- code switch, 6-
Gas-cooker, 7- air supply pipe, 8- air valve, 9- container.
Specific embodiment
The present invention is described in further details below with reference to the drawings and specific embodiments:
Embodiment 1: such as Fig. 1-5, a kind of safety monitoring device based on non-contact temperature detection, including it is control box 1, red
Outer temperature sensor 3 and connector；The termination control box of connector one, the end of the other end are provided with the infrared temperature sensing
Device；
Infrared temperature sensor is used for the outside wall temperature of detection container 9；The container is the burning being placed on gas-cooker 6
Cup, pot or furnace；
It controls and is equipped with control circuit and alarm in box；Infrared temperature sensor is connected with the input terminal of control circuit, control
Comparator unit is equipped in circuit processed, comparator unit is used to compare the temperature of infrared temperature sensor detection and temperature is preset
Value issues alarm signal by control circuit if the temperature value of infrared temperature sensor detection is higher than preset value；
Temperature preset value is 160 DEG C.
The connector is flexible steel in flat section tubing 2, the direction of energy freedom and flexible modulation infrared temperature sensor.
Alarm includes wireless alarm signal output module in buzzer, loudspeaker and wireless alarm signal output module
For exporting wireless alarm signal to intelligent terminal, the intelligent terminal be mobile phone, tablet computer or be linked into internet or
The PC terminal or laptop of local area network；
The wireless alarm signal output module includes bluetooth module, WiFi module, GSM, 3G or 4G communication module；
Safety monitoring device further includes the air valve 8 for controlling the gas supply of gas-cooker, and the air valve is controlled by institute
The alarm signal stated；
Control 3 code switch in box at least provided with 3 alarm clocks and for alarm time to be arranged；
It controls box and is equipped with display screen, air valve is also controlled by the time arriving signal of alarm clock output；
The safety monitoring device further includes the combustible gas sensor being connected with control circuit, and control circuit passes through
When combustible gas sensor detects that combustable gas concentration is more than the default density, start alarm；
The control circuit is single-chip microcontroller, DSP or arm processor.
It is preferred that model STC15F2K60S2 single-chip microcontroller, this is the single-chip microcontroller of Shenzhen company design production, than tradition
8051 single-chip microcontrollers will fastly many times, but function and instruction be it is the same, especially support C language programs.
On the problem of showing, charactron is the display mode of the most frequently used language, and program and circuit can also be found very on the net
More references.But numeral method content is single, and this project needs content to be shown more, therefore, using the liquid of dot matrix
Crystal display screen (LCD), it can show picture, Chinese character, number, various letters and punctuation mark under the control of single-chip microcontroller, very
It can extremely show self-designed icon.It is made of the dot matrix that can control, and the display or not of these points is controlled by single-chip microcontroller
It has been shown that, preferably selects monochromatic matrix LCD, and resolution ratio is 240*128 point.
After code switch, the setting of timer and working condition switching only need a code switch energy complete
At entire interface only needs 4 code switch.The modification of real-time time increases a button, this button can allow program into
Enter modification state.
In order to improve the practicability of timer, and the function of single-chip microcontroller is made full use of, it is some to return this timer design
Miscellaneous function: 1 relay of control, time then disconnect power supply；Combustible gas sensor is detecting gas leakage Times
It is alert.In order to debug conveniently, goes out a USB interface using serial-port extension, be mainly used for downloading more new procedures, bluetooth connection mould
Block, for connecting smart phone.
CPU uses STC15F2K60S2, this is a single-chip microcontroller compatible with 8051, but has very in terms of pin and speed
Big promotion.3 rotary coding switch are used to be arranged the time of 3 timers and open and operate with stopping working etc., another
A rotary encoder is for being arranged alarm temperature value, and relay output is for then cutting off out-put supply when timing, to close
Some electrical equipments are closed, another relay is exported for cutting off gas source.USB interface is mainly used for downloading and debugging in this system
Program.Bluetooth module is connect by serial port with CPU, communications protocol built in module itself.Using ZYMQ-2 imflammable gas
Sensor detects the concentration of imflammable gas, issues signal to single-chip microcontroller when kitchen fuel gas has leakage, and single-chip microcontroller receives this
Alarm signal is issued after a signal, sends mobile phone for alarm signal.
Infrared temperature sensor MLX90614 is communicated using SMBus agreement and CPU, can by environment temperature, target temperature with
Data mode is sent out, and CPU carries out data conversion upon receipt can be obtained by temperature value.
SCL, PWM/SDA pin of MLX90614 is directly connected to common I/O mouthfuls of MCU, defeated due to MLX90614
Entering output interface is drain open circuit (OD) structure, is needed plus pull-up resistor.Multiple MLX90614 can be used in a system, often
The corresponding different address of a MLX90614, different MLX90614 is accessed by the difference of address, at most can achieve 127
It is a.
Sending and receiving data is carried out as unit of byte, and sending a byte every time, (step-by-step is sent, and sends 8
Position is exactly a byte), it is then judged as whether other side has response, if there is response, just then sends next byte；If
It does not reply, repeatedly retransmits the byte, until there is response, just then send next byte, if after repeatedly retransmitting, still
It does not reply, just terminates.When receiving data, a byte (step-by-step receives, and receiving 8 positions is exactly a byte) is received every time,
Then an answer signal is sent to other side, then can continues to next byte.The number read from MLX90614 kind
It according to being 16, is made of most-significant byte (DataH) and least-significant byte (DataL) two parts, wherein the storage of address ram 07H unit is
TOBJ1 data, for data area from 0x27AD to 0x7FFF, the temperature range of expression is -70.01 DEG C to+382.19 DEG C.From
The data (DataH:DataL) read in MLX90614 are scaled shown in temperature data (unit is DEG C) following formula:
T=(DataH:DataL) * 0.02-273.15；
Software is mainly made of 2 functions.
Uint MEM_READ (uchar slave_addR, uchar cmdR) reads the RAM data of sensor internal,
In the area RAM of sensor, the storage of address 06 has ambient temperature value, and 07H storage has target temperature value.
The data of TEMP are converted into temperature by (formula one), for sentencing by void CALTEMP (uint TEMP) temperature transition
Disconnected and display.Program further includes temperature sampling filtering algorithm.
Found in actual test: program be not to the reading of temperature sensor it is highly stable, sometimes one deviate just
The biggish temperature value of constant value occurs, it may be possible to miscommunication when reading, it is also possible to the interference of temperature sensor itself.It solves
Method be that the data of reading are filtered.The common method of filtering is repeatedly to be read, and is averaged, number is got over
More, data are more stable, but may require that longer time.By observing the actual conditions of temperature, discovery mistake is not very much, but every
Secondary deviation is larger, and mistake usually will not continuously occurs, then using the method for " read and take median three times ".Using
" caving area " is sorted three temperature values using " bubbling method " after reading temperature value three times from low to high, takes intermediate temperature
Angle value is as current actual temperature.It is handled by this mode, is able to achieve the stable detection of temperature.
It, can be with Display of Chinese characters, figure, number etc. using 240*128 LCD screen.Show abundant in content letter
It is clean, the state including each timer, real-time time, kitchen temperature etc..
Timer processing
With the timer in single-chip microcontroller, an interruption is generated each second, it is current to notify that main program is read in interrupt function
Real-time clock calculate remaining time or the time-out of timer in the open state and according to the state of each timer
Time, and show.
Since crystal oscillator frequency is 11.0592MHz, the toggle rate of this chip is identical as crystal oscillator frequency, and timer 1 only has
16 bits indicate timing, so only about 5.9 milliseconds of maximum timing, so timer setting in 0.5 millisecond
It is disconnected primary, it is exactly one second after adding 2000 times, then the second is indicated as soon as adding variable systime in interrupt routine
Bsec sets 1.In addition in a program, due to using switch of the rotary coding switch as the setting time, in order to carry out program
Shake, to improve the reliability of operation, by verification experimental verification, every 0.5 millisecond of rotary coding switch is checked once the most rationally, behaviour
It is convenient for making to get up, so having checked the state of rotary coding switch in interrupt routine, and has been stored in variable K.
Void TimeOP (void) is executed once each second in main program, is judged the state of timer and is handled display
Content.Timer is always operating at following four state: closing (state 0), operation (state 1), alarm (state 2), stops
(state 3).Under closed state, display shows "Off", and timer is not-time, enters operating status after pressing corresponding switch；
Operating status indicates that the preset time is arrived in timer timing not yet, and display can show the remaining time, big when remaining time
When 1 minute, with " minute " for unit, when less than 1 minute, state is just transferred to after time is up for unit with " second " automatically
2, or press to being transferred to " halted state " after inductive switch；Alarm condition indicates that the timer preset time has arrived, buzzing
Device can make a sound alarm, and display shows quarter-bell symbol, while showing time-out time (in seconds), from turn after 30 seconds
Enter halted state, under halted state, the display that display keeps original is constant: display " time-out 30 seconds " and quarter-bell symbol, but
Buzzer stopping makes a sound, and different from the display of closed state, to remind user that this timer time arrives, but user does not have
Have and comprehend it, press to after inductive switch enter closed state.
Imflammable gas monitoring
Using the leakage of ZYMQ-2 combustible gas sensor detection combustion gas, this sensor can detecte liquefied gas, wine
The common imflammable gas concentration such as essence, detection range 100-10000ppm are exported with voltage system, are made as kitchen alarm
Used time, it is not required that know specific concentration, it is only necessary to provide alarm when dangerous just, in order to simplify design, sense
Level-one comparator is added after device output, high level is exported when normal, low level has been exported when concentration is greater than 500ppm, single-chip microcontroller is only
Detect that this low level issues gas leakage alarm signal.
Bluetooth function
In family in use, often thering is food stewing in kitchen, people but takes a break in parlor, in order to be applicable in this feelings
Whether condition devises Bluetooth function, cooperate mobile phone A AP software, so that it may the time of timer is checked on smart phone
It arrives.Turn the module (model SPP-CA) of serial port using a bluetooth, it can parse Bluetooth protocol, and switching at
Become a transparent serial port after function, thus single-chip microcontroller can be come with serial port using Bluetooth function.
Subordinate list: main element inventory
Claims (1)
1. a kind of safety monitoring device based on non-contact temperature detection, which is characterized in that including controlling box (1), infrared temperature
Spend sensor (3) and connector；The termination control box of connector one, the end of the other end are provided with the infrared temperature sensing
Device；
Infrared temperature sensor is used for the outside wall temperature of detection container (9)；The container is the burning placed on the heating
Cup, pot or furnace；
It controls and is equipped with control circuit and alarm in box；Infrared temperature sensor is connected with the input terminal of control circuit, control electricity
Comparator unit is equipped in road, comparator unit is used to compare the temperature and temperature preset value of infrared temperature sensor detection, if
The temperature value of infrared temperature sensor detection is higher than preset value, then issues alarm signal by control circuit；
Alarm includes at least one of buzzer, loudspeaker and wireless alarm signal output module, and wireless alarm signal is defeated
Module is for exporting wireless alarm signal to intelligent terminal out, the intelligent terminal for mobile phone, tablet computer or be linked into because
The PC terminal or laptop of special net or local area network；
The wireless alarm signal output module be bluetooth module, WiFi module, in GSM, 3G or 4G communication module at least
It is a kind of；
Safety monitoring device based on non-contact temperature detection further includes the air valve for controlling the gas supply of gas-cooker
(8), the air valve is controlled by the alarm signal；
It controls box and is equipped with display screen (4), control and be provided with alarm clock and the signal input dress for alarm time to be arranged in box
It sets；The signal input apparatus is code switch (5)；
The safety monitoring device based on non-contact temperature detection further includes the imflammable gas being connected with control circuit
Sensor, when control circuit detects that combustable gas concentration is more than the default density by combustible gas sensor, starting report
Alert device；
Temperature preset value is 150 DEG C or 160 DEG C；
Control 3 code switch in box at least provided with 3 alarm clocks and for alarm time to be arranged；
Air valve is also controlled by the time arriving signal of alarm clock output；
The control circuit is single-chip microcontroller, DSP or arm processor；
Step 1: the end of connector is aligned to the container heated, the temperature of infrared temperature sensor detection container (9) outer wall
Degree；
Step 2: the temperature value and preset temperature value that the control circuit in control box detects infrared temperature sensor carry out
Compare, if the temperature value that infrared temperature sensor detects is greater than preset temperature value, starts alarm；Remind user timely
To in-situ processing；
Temperature preset value is the temperature value of container outer wall when the liquid in container is dryouied；
The connector is flexible steel in flat section tubing (2), can freedom and flexible modulation infrared temperature sensor direction；
After code switch, the setting of timer and working condition switching only need a code switch that can complete,
Entire interface only needs 4 code switch, and the modification of real-time time increases a button, this button can allow program to enter modification
State；
Infrared temperature sensor MLX90614 is communicated using SMBus agreement and CPU, can be by environment temperature, target temperature with data
Mode is sent out, and CPU carries out data conversion upon receipt can be obtained by temperature value；
SCL, PWM/SDA pin of MLX90614 is directly connected to common I/O mouthfuls of MCU, due to MLX90614
Input/output interface be drain open-circuit structure, need plus pull-up resistor；Multiple MLX90614 are used in a system, each
MLX90614 corresponds to a different address, and different MLX90614 is accessed by the difference of address, at most can achieve
127；
Sending and receiving data is carried out as unit of byte, is sent a byte every time, is then judged as whether other side has
Response just then sends next byte if there is response；If do not replied, the byte is repeatedly retransmitted, until there is response,
Next byte is just then sent, if, still without response, just terminated after repeatedly retransmitting；When receiving data, one is received every time
Then a byte sends an answer signal to other side, then can continue to next byte；From MLX90614 kind
The data of reading are 16, are made of high 8 DataH and low 8 DataL two parts, wherein address ram 07H is mono-
Member storage is TOBJ1 data, data area from 0x27AD to 0x7FFF, the temperature range of expression be -70.01 DEG C to+
382.19℃；The data (DataH:DataL) read from MLX90614 are scaled shown in the following formula of temperature data:
T= (DataH:DataL)*0.02-273.15 ；
Software is mainly made of 2 functions；
Uint MEM_READ (uchar slave_addR, uchar cmdR) reads the RAM data of sensor internal, is passing
In the area RAM of sensor, the storage of address 06 has ambient temperature value, and 07H storage has target temperature value；
Void CALTEMP (uint TEMP) temperature transition, by the data of TEMP by temperature is converted into, for judging and showing.
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| CN107367697B (en) * | 2017-08-24 | 2020-09-01 | 武汉大学 | Double-detector lithium battery surface temperature detection device and method |
| TWI670035B (en) * | 2017-11-28 | 2019-09-01 | 睿橋資訊股份有限公司 | Dry burning judgment method and dry burning warning system |
| CN108320474A (en) * | 2018-03-29 | 2018-07-24 | 石信元 | Hearth is forgotten to close fiery reminiscences and its monitoring method, observation circuit |
| CN110345520A (en) * | 2019-07-17 | 2019-10-18 | 移康智能科技（上海）股份有限公司 | A kind of gas-cooker intelligent monitor system |
| CN110631369A (en) * | 2019-08-13 | 2019-12-31 | 福建师范大学 | Muffle furnace with cooling chamber |
| CN112484090A (en) * | 2020-12-02 | 2021-03-12 | 中南林业科技大学 | Gas stove safety monitoring method based on intelligent judgment for dry burning prevention |
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| CN2911629Y (en) * | 2004-12-31 | 2007-06-13 | 袁剑敏 | Non-contact infrared temp measurer with universa probe |
| CN104013303A (en) * | 2014-05-30 | 2014-09-03 | 江汉大学 | Kettle monitoring device and system |
| CN105551200A (en) * | 2016-02-25 | 2016-05-04 | 中南林业科技大学 | Multifunctional monitoring and alarming system for kitchen |
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| JP4563207B2 (en) * | 2005-02-17 | 2010-10-13 | ホーチキ株式会社 | Temperature monitoring system for gas equipment |
| CN203870775U (en) * | 2014-05-13 | 2014-10-08 | 苏州经贸职业技术学院 | Dry burning prevention intelligent prompting apparatus based on Internet of Things technology |
| CN104776922A (en) * | 2015-04-26 | 2015-07-15 | 张新安 | Digital infrared thermometer |
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| CN2911629Y (en) * | 2004-12-31 | 2007-06-13 | 袁剑敏 | Non-contact infrared temp measurer with universa probe |
| CN104013303A (en) * | 2014-05-30 | 2014-09-03 | 江汉大学 | Kettle monitoring device and system |
| CN105551200A (en) * | 2016-02-25 | 2016-05-04 | 中南林业科技大学 | Multifunctional monitoring and alarming system for kitchen |
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