CN202330321U - Device for determining spontaneous ignition temperature of liquid chemical - Google Patents
Device for determining spontaneous ignition temperature of liquid chemical Download PDFInfo
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- CN202330321U CN202330321U CN2011204881787U CN201120488178U CN202330321U CN 202330321 U CN202330321 U CN 202330321U CN 2011204881787 U CN2011204881787 U CN 2011204881787U CN 201120488178 U CN201120488178 U CN 201120488178U CN 202330321 U CN202330321 U CN 202330321U
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Abstract
The utility model discloses a device for determining the spontaneous ignition temperature of a liquid chemical, and aims to solve the problem that greater errors can occur due to low response speed in an instrument in the prior art and human factors. The device comprises an integral test determination device, a data acquisition circuit and later stage data processing. A test device is started; flammable liquid chemical is placed in the device and then data is acquired by various sensors in real time and transmitted to a computer for data processing and displaying, so that values to be determined, such as hot flame spontaneous ignition temperature, cold flame spontaneous ignition temperature, time delay, an air pressure value and a reaction starting temperature of the liquid chemical, are obtained. According to the device, the safety, accuracy and precision requirement of the test are fully considered, the manual part is simplified to the maximum, the errors of a determination value caused by manual operation are reduced and various parameters of the liquid chemical under the spontaneous ignition condition are determined efficiently and quickly.
Description
Technical field
The utility model belongs to the temperature detection technical field, is specifically related to a kind of liquid chemical self-ignition temperature determinator.
Background technology
Spontaneous combustion is meant material under the situation of no external point burning things which may cause a fire disaster (like spark or flame) effect, leans on self-heating or outer heat and the phenomenon of generation burning.Generally speaking, combustible contacts all with air, and oxidizing process slowly can take place, but speed is very slow, and the heat of release also seldom because continuous ambient is dispelled the heat, luminescence phenomenon can not occur simultaneously as burning.If temperature raises or other condition changings, oxidizing reaction rate is accelerated, and disengages heat and increases, and can not all just dissipate to accumulate, and the material self-temperature is progressively raise.When arriving the temperature that this material burns voluntarily, will blaze up spontaneous combustion that Here it is voluntarily.Certain material being heated take place the minimum temperature of spontaneous combustion is exactly the spontaneous ignition temperature of this material, also is self-ignition temperature.That the material that when being lower than self-ignition temperature, occurs sends is faint, nattier blue cold light or flame are called cool flame, and the temperature of this moment is called the cool flame self-ignition temperature.Material is meant from sample to add the test flask to the time of catching fire that this time is called ignition delay time from being heated to the time between catching fire.
Stipulated among the GB GB/T 21860-2008 (hereinafter to be referred as GB) to measure the used part test device of liquid chemical self-ignition temperature: require control accuracy ± 1 ℃ of crucible oven, homogeneity reaches particular requirement (seeing GB); Requiring temperature thermocouple is K calibration, roc silicate material flask, 500ul～1000ul syringe, timer etc.Stipulated also in the GB that measuring process is followed successively by: the temperature control process, control flask interior temperature reaches predetermined value; Add sample, guarantee dark surrounds; Whether experimental observation spontaneous combustion takes place, and relates to repeatedly temperature adjustment (seeing GB) in this process; Increase the test of test specimen amount; The record test figure.Use the recorder trace flask interior variation of temperature of variable current potential in the GB, use stopwatch or electronic timer ignition lag.These two kinds of metering systems because these two measurements relate to the mensuration of self-ignition temperature and ignition lag, count for much because the reaction velocity and the human factor of instrument can produce than mistake simultaneously.
Summary of the invention
The utility model is to the deficiency of prior art, and body has supplied a kind of liquid chemical self-ignition temperature determinator.
The utility model comprises temperature control of pot furnace system, analog to digital conversion circuit, host computer disposal system.The temperature control of pot furnace system comprises crucible oven and temperature controller; Analog to digital conversion circuit comprises with the microcontroller being the A/D change-over circuit, power circuit, key circuit, visible light sensor array, telecommunication circuit, LED display circuit etc. of core, and the host computer disposal system is a PC, and crucible oven adopts the ceramic fiber insulation material; With the resistance wire is heating element; The crucible cover left-right symmetric is divided into two parts, middle perforate, and the aperture is decided according to the aperture of putting into flask.Right angle grass tube and temperature thermocouple T put into flask interior, and temperature thermocouple T and grass tube all are fixed on the crucible cover.The flask periphery is evenly wrapped up by aluminium foil, and simultaneously in flask neck bottom, A is wrapped up with aluminium foil respectively in the outside of flask middle part and bottom, B, and three K type thermocouples of C, the lead-in wire of these three thermopairs is drawn from the groove of crucible cover bottom.The visible light sensor array is arranged on iron stand, and the visible light sensor array can be adjusted angle flexibly, and iron stand is placed on crucible oven and covers, and guarantees that simultaneously the visible light sensor array can see through the hole supervision flask interior situation on the crucible cover.Middle temperature-control heat couple D is connected on the temperature controller, and as temperature controlled foundation, D is arranged in crucible oven madial wall centre position.The simultaneous temperature controller passes to the temperature value of thermopair D in the PC through the RS485 interface.T, A, B, the simulating signal that four thermopairs of C produce is carried out digital-to-analog conversion with the simulating signal of baroceptor through analog to digital conversion circuit, and the digital signal after the conversion passes in the PC through serial ports.
The visible light sensor array is for to constitute photosensitive array by five visible light sensors.Visible light sensor is mainly responsive to visible light, through regulating inner adjustable resistance and adopting epoxide resin nano packaging sensitization part, can eliminate infrared ray and the influence of ultraviolet ray to sensor devices, reaches the effect of similar human eye.In dark surrounds, catch the visible light that occurs, send out corresponding electric signal simultaneously and give microcontroller.Through experiment iron stand clip be arranged in face the crucible cover perforate directly over suitable distance.
The A/D change-over circuit becomes digital signal with analog signal conversion; Digital signal passes to the PC storage through microcontroller and telecommunication circuit afterwards; These data-signals show that through the LED display circuit power circuit provides power supply for the microcontroller operating circuit simultaneously, and key circuit is as the action of outside input control microcontroller; The signal that the visible light sensor array produces; At first pass to the PC storage through telecommunication circuit then through the processing of microcontroller, temperature controller is controlled the temperature of crucible oven through temperature-control heat couple, and simultaneously that crucible oven is current temperature passes to PC through the RS485 interface.
The power circuit part branch comprises power interface J2; Standby power supply interface J1, self-lock switch S2, overcurrent protection switch F1; The first voltage stabilizing diode D13; The first diode D10, the second diode D11, the second triode D12, the first polar capacitor C30, the second polar capacitor C32, the 3rd polar capacitor C34, quadripolarity capacitor C 35, the first nonpolar capacitor C 31, second nonpolar capacitor C the 33, the 3rd nonpolar capacitor C the 36, the 4th nonpolar capacitor C 37; The first light emitting diode D14, the second light emitting diode D15, the 3rd light emitting diode D16, first resistance R 9, second resistance R 10, the 3rd resistance R 11, the 4th resistance R 12.Power interface J2 is a three-pin socket, and 1 pin of J2 connects 2 pin of self-lock switch S2,2,3 pin of J2 and connect after connect 5 pin of S2.1 pin of S2 connects the anode of the 3rd diode D12, the 6 pin ground connection of S2, and 3,4 pin of S2 are unsettled.The negative electrode of D12 is connected to the end of overcurrent protection switch F1; The other end of F1 is connected to the negative electrode of the first diode D10, the anode of the first polar capacitor C30, the negative electrode of the first voltage stabilizing diode D13, an end of the first nonpolar capacitor C 31 and the input end of voltage stabilizing chip U5; The U5 output terminal connects anode, the negative electrode of the 3rd diode D11, the positive pole of the second polar capacitor C32, second nonpolar capacitor C 33 1 ends of the second diode D10; First resistance R, 9 one ends and VCC8 end; The other end of R9 is connected to the positive pole of the first light emitting diode D14, D14 minus earth.The other end of the earth terminal of the other end of the negative pole of the positive pole of voltage stabilizing diode D13, the first polar capacitor C30, the first nonpolar capacitor C 31, voltage stabilizing chip U5, the negative pole of the second polar capacitor C32, the second nonpolar capacitor C 33 and 2 pin of spare interface J1 are ground connection all.1 pin of spare interface J1 connects the positive pole of D11; The output terminal of voltage stabilizing chip U5 is received voltage stabilizing chip U6 input interface; The U6 output terminal is connected with the positive pole of the 3rd polar capacitor C34, an end of the 3rd nonpolar capacitor C 36 and an end of second resistance R 10; The R10 other end is received the positive pole of the second light emitting diode D15,1 pin of voltage stabilizing chip U5 chip, the negative pole of the 3rd polar capacitor C34, the other end of the 3rd nonpolar capacitor C 36 and the minus earth of the second light emitting diode D15.The U6 output terminal is connected with voltage stabilizing chip U7 input end; The U7 output terminal with to the positive pole of quadripolarity capacitor C 35, an end of the 4th nonpolar capacitor C 37 and an end of the 3rd resistance R 11; The R11 other end is received the positive pole of the 3rd light emitting diode D16,1 interface of voltage stabilizing chip U7, the positive pole of quadripolarity capacitor C 35, the other end of the 4th nonpolar capacitor C 37, the minus earth of the 3rd light emitting diode D16.Power supply ground end links to each other through the 4th resistance R 12 with digital electrical seedbed end.
Temperature sensing circuit comprises the 5th resistance R 13, the 6th resistance R 14, the five polar capacitor C38, the 5th nonpolar capacitor C 39, thermometric chip U8.The 5th resistance R 13, the 6th resistance R 14 1 ends are connected to power supply VCC3.3,1 pin of the 5th resistance R 13 another termination U8,2 pin of the 6th resistance R 14 another termination thermometric chip U8.4 pin, 5 pin, 6 pin, the 7 pin ground of thermometric chip U8,8 pin meet power supply VCC3.3.1 pin of thermometric chip U8 connects 47 pin of main control chip U1 simultaneously, 2 pin of thermometric chip U8 connect 46 pin of main control chip U1 simultaneously.
Key circuit partly comprises identical first to the 8th button totally 8 buttons, one of pull-up resistor JP1.All eight button one ends are connected with 2 pin to 9 pin of pull-up resistor JP1,79 pin, 80 pin, 78 pin, 1 pin, 53 pin, 52 pin, 14 pin and 13 pin on the main control chip respectively, and the other end of eight buttons is ground connection all.
The LED display circuit partly comprises the 4th light emitting diode D17, the 5th light emitting diode D18, the 6th light emitting diode D19, the 7th light emitting diode D20, the 8th light emitting diode D21, the 9th light emitting diode D22, the tenth light emitting diode D23, the 11 light emitting diode D24.The first exclusion R15, the second exclusion R16.The whole ground connection of the negative electrode of eight light emitting diodes; Light emitting diode D17, light emitting diode D18, the 6th light emitting diode D19, the 7th light emitting diode D20 are connected with 2 pin, 4 pin, 6 pin, 8 pin of the first exclusion R15 respectively; The 8th light emitting diode D21, the 9th light emitting diode D22, the tenth light emitting diode D23, the 11 light emitting diode D24 are connected with 2 pin, 4 pin, 6 pin, 8 pin of the second exclusion R16 respectively; 1 pin of the first exclusion R15,3 pin, 5 pin, 7 pin are connected with 61 pin, 62 pin, 63 pin, 66 pin of main control chip respectively, and the second exclusion R16 is connected with 67 pin, 68 pin, 69 pin, 54 pin of main control chip respectively.
Telecommunication circuit partly comprises the 6th nonpolar capacitor C the 40, the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the 9th nonpolar capacitor C the 43, the tenth nonpolar capacitor C 44,16 pin level transferring chip U10,11 needle serial port USART1.
One end of the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the tenth nonpolar capacitor C 44 links to each other with 16 pin, 2 pin, 6 pin of level U10 respectively, and the other end of the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the tenth nonpolar capacitor C 44 is connected with 15 pin of level transferring chip U10 and ground connection.The 6th capacitor C 40 1 ends connect 1 pin of level transferring chip U10, and the other end connects 3 pin of level transferring chip U10.The 9th electric capacity 43 1 ends connect level transferring chip 4 pins, and the other end connects its 5 pin.13 pin of level transferring chip U10,14 pin are connected with 3 pin, 2 pin of serial ports USART1 respectively.5 pin of serial ports USART1,10 pin, 11 pin ground connection; 16 pin of level transferring chip U10 connect power supply; 11 of level transferring chip U10 is connected with 41 pin of main control chip; 12 of level transferring chip U10 is connected with 42 pin of main control chip, and 7 pin of 1 pin of serial ports USART1,4 pin, 7 pin, 8 pin, 9 pin and level transferring chip U10,8 pin, 9 pin, 10 foot rests are empty.
Accurate A/D analog to digital conversion circuit comprises three master chip U2, U3, U4; Magnetic bead FB1; Sextupole property capacitor C 16, the seven polar capacitor C19, the 11 nonpolar capacitor C the 17, the 12 nonpolar capacitor C the 18, the 13 nonpolar capacitor C the 15, the 14 nonpolar capacitor C the 21, the 15 nonpolar capacitor C 20; The second voltage stabilizing diode D1, the 7th resistance R 6.
2 pin of U2 and the positive pole of sextupole property capacitor C 16, the 11 nonpolar capacitor C 17 1 ends and magnetic bead FB1 an end be connected another termination of magnetic bead FB1 VCC.The other end ground connection of the other end of sextupole property capacitor C 16 and the 11 nonpolar capacitor C 17.6 pin of U2 are connected with an end of the 12 nonpolar capacitor C 18,1 pin of U3.The other end ground connection of the 12 nonpolar capacitor C 18; 8 pin of U3 are connected with power supply with an end of the 13 nonpolar capacitor C 15; The other end ground connection of the 13 nonpolar capacitor C 15, the 4 pin ground connection of U3,5 pin of U3 are connected with 10 pin of main control chip U1; 6 pin of U3 are connected with 7 pin of main control chip U1; 7 pin of U3 are connected with 6 pin of main control chip U1, and 1 pin of outer input interface P5 is connected with the end of the negative electrode of the second voltage stabilizing diode D1 with the 7th resistance R 6, external interface P5 and second voltage stabilizing, two utmost point D1 other end ground connection.One end of the 7th resistance R 6 another termination the 14 nonpolar capacitor C 21 and 3 pin of U4, the other end ground connection of the 14 nonpolar capacitor C 21,6 pin of U4 are connected with 2 pin of 2 pin of U4, U3.7 pin of U4 are connected with power supply with an end of the positive pole of the 7th polar capacitor C19, the 15 nonpolar capacitor C 20, the other end ground connection of the negative pole of the 7th polar capacitor C19 and the 15 nonpolar capacitor C 20, and the 4 pin ground connection of U4, all the other pins are built on stilts among the U2U3U4.
Conventional A/D analog to digital conversion circuit comprises the 3rd voltage stabilizing diode D2, the 4th voltage stabilizing diode D3, the 5th voltage stabilizing diode D4; The 6th voltage stabilizing diode D5, the 7th voltage stabilizing diode D6, the 8th voltage stabilizing diode D7; The 9th voltage stabilizing diode D8, the tenth voltage stabilizing diode D9.The nonpolar capacitor C of the 16 nonpolar capacitor C 22, the 17 23, the 18 nonpolar capacitor C 24; The nonpolar capacitor C of the 19 nonpolar capacitor C 25, the 20 26, the 21 nonpolar capacitor C 27; The 22 nonpolar capacitor C 28, the 23 nonpolar capacitor C 29.The 3rd exclusion R11, wiring slot P2.The negative pole of the 3rd voltage stabilizing diode D2, the 4th voltage stabilizing diode D3, the 5th voltage stabilizing diode D4, the 6th voltage stabilizing diode D5, the 7th voltage stabilizing diode D6, the 8th voltage stabilizing diode D7, the 9th voltage stabilizing diode D8, the tenth voltage stabilizing diode D9 is connected with 1 pin, 2 pin, 3 pin, 4 pin, 5 pin, 6 pin, 7 pin, 8 pin of 10 pin, 9 pin, 8 pin, 7 pin, 6 pin, 5 pin, 4 pin, 3 pin and the 3rd exclusion R11 of wiring slot P2 respectively; 1 pin of wiring slot P2,2 pin ground connection; The 16 nonpolar capacitor C the 22, the 17 nonpolar capacitor C the 23, the 18 nonpolar capacitor C the 24, the 19 nonpolar capacitor C the 25, the 20 nonpolar capacitor C the 26, the 21 nonpolar capacitor C the 27, the 22 nonpolar capacitor C the 28, the 23 nonpolar capacitor C 29 is connected with 17 pin, 16 pin, 15 pin, 21 pin, 22 pin, 27 pin, 28 pin, 29 pin of 9 pin, 10 pin, 11 pin, 12 pin, 13 pin, 14 pin, 15 pin, 16 pin and the main control chip U1 of R11 respectively, and the positive pole of diode and the other end of electric capacity be ground connection all.
The visible light sensor array comprises 10 resistance, 5 rheostats, 5 visible light sensors, 5 electric capacity, wiring slot P9, wiring slot P10.
The 8th resistance R 25 1 ends connect power supply; The other end of the 8th resistance R 25 is connected with 1 pin of visible light sensor U15 power supply, receives 2 pin of interface slot P9 after 2 pin of the 9th resistance R 30 1 ends and the 24 nonpolar electric capacity capacitor C 62 1 ends, visible light sensor U15 are connected.4 pin of visible light sensor U15 are connected with the pin that R35 remains in the pin with the first slide rheostat R35 interim pins; Slide rheostat R35 is left a pin ground connection; The 24 nonpolar capacitor C 62 other end ground connection, 3 pin of visible light sensor U15 power supply are connected back ground connection with the other end of the 9th resistance R 30.
The tenth resistance R 26 1 ends connect power supply; The other end of the tenth resistance R 26 is connected with 1 pin of visible light sensor U16 power supply, receives 1 pin of interface slot P9 after 2 pin of the 11 resistance R 31 1 ends and the 25 nonpolar capacitor C 63 1 ends, visible light sensor U16 are connected.4 pin of visible light sensor U16 are connected with the pin that R36 remains in the pin with the second slide rheostat R36 interim pins; Slide rheostat R36 is left a pin ground connection; The 25 nonpolar capacitor C 63 other end ground connection, 3 pin of visible light sensor U16 power supply are connected back ground connection with the other end of the 11 resistance R 31.
The 12 resistance R 22 1 ends connect power supply; The other end of the 12 resistance R 22 is connected with 1 pin of visible light sensor U12 power supply, receives 5 pin of interface slot P9 after 2 pin of the 13 resistance R 27 1 ends and the 26 nonpolar capacitor C 59 1 ends, visible light sensor U12 are connected.4 pin of visible light sensor U12 are connected with the pin that R32 remains in the pin with the 3rd slide rheostat R32 interim pins; Slide rheostat R32 is left a pin ground connection; The other end ground connection of the 26 nonpolar capacitor C 59,3 pin of visible light sensor U12 power supply are connected back ground connection with the other end of the 13 resistance R 32.
The 14 resistance R 23 1 ends connect power supply; The other end of the 14 resistance R 23 is connected with 1 pin of visible light sensor U13 power supply, receives 4 pin of interface slot P9 after 2 pin of the 15 resistance R 28 1 ends and the 27 nonpolar capacitor C 60 1 ends, visible light sensor U13 are connected.4 pin of visible light sensor U13 are connected with the pin that R33 remains in the pin with the 4th slide rheostat R33 interim pins; Slide rheostat R33 is left a pin ground connection; The 27 nonpolar capacitor C 60 other end ground connection, 3 pin of visible light sensor U13 power supply are connected back ground connection with the other end of the 15 resistance R 28.
The 16 resistance R 24 1 ends connect power supply; The other end of the 16 resistance R 24 is connected with 1 pin of visible light sensor U14 power supply, receives 3 pin of interface slot P9 after 2 pin of the 17 resistance R 29 1 ends and the 28 nonpolar capacitor C 61 1 ends, visible light sensor U14 are connected.4 pin of visible light sensor U14 are connected with the pin that R34 remains in the pin with the 5th slide rheostat R34 interim pins; Slide rheostat R34 is left a pin ground connection; The other end ground connection of the 28 nonpolar capacitor C 61,3 pin of visible light sensor U14 power supply are connected back ground connection with the other end of the 17 resistance R 29.
1 pin of wiring slot P10 connects power supply, the 2 pin ground connection of wiring slot P10.
Warning circuit comprises the first hummer LS1, the first triode Q1, the tenth resistance R 3.The first triode Q1 emitter is connected with VCC, and the first triode Q1 base stage is connected with an end of the tenth resistance, and the first triode Q1 collector is connected the minus earth of hummer with the positive pole of hummer.
Microcontroller comprises main control chip U1, contact pin ICSP1, the first crystal oscillator Y1, the 25 nonpolar capacitor C the 7, the 26 nonpolar capacitor C the 8, the 27 nonpolar capacitor C the 12, the 28 nonpolar capacitor C the 13, the 29 nonpolar capacitor C 14.The 11 resistance R the 1, the 12 resistance R the 2, the 13 resistance R the 4, the 14 resistance R 5.The 9th button S1.
The first crystal oscillator Y1 two ends are connected the other end ground connection of the 27 nonpolar capacitor C the 12, the 28 nonpolar capacitor C 13 with an end of the 27 nonpolar capacitor C the 12, the 28 nonpolar capacitor C 13 and 49 pin, 50 pin of main control chip U1 respectively.One end of the 25 nonpolar capacitor C the 7, the 26 nonpolar capacitor C 8 and the 12 resistance R 2 is connected with main control chip 24 pin, C7, C8, R2 other end ground connection.One end ground connection of the 11 resistance R 1; The other end of the 11 resistance R 1 is connected with main control chip 23 pin; The 13 resistance R 4 one termination VCC, the other end of the 13 resistance R 4 is connected C14 other end ground connection with 9 pin of an end, the 29 nonpolar capacitor C 14 1 ends and the main control chip U1 of the 9th button S1; One end of another termination the 14 resistance R 5 of button S1, R5 other end ground connection; 1 pin of contact pin ICSP1 is connected with 9 pin of main control chip U1; 2 pin of contact pin ICSP1 meet VCC, the 3 pin ground connection of contact pin ICSP1, and 4 pin of contact pin ICSP1 are connected with 20 pin of main control chip U1; 5 pin of contact pin ICSP1 are connected with 19 pin of main control chip U1, and 5 pin of contact pin ICSP1 and 6 foot rests are empty.
Power supply stabilization circuit comprises the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and ends of the earth property capacitor C 2.One end of the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and the positive terminal of polar capacitor C2 are connected with VCC.The other end of the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and the minus earth of polar capacitor C2.
Beneficial effect: the utility model provides and has met the crucible oven experimental enviroment that GB requires fully, i.e. temperature control and heat insulation effect surpass the GB testing requirements.Adopt the high-speed a/d converting system to compare the low register of sampling rate, obtain more accurate liquid chemical self-ignition temperature point, improved the accuracy of ignition delay time simultaneously.Monitor the flask interior temperature variation in real time through thermopair, and the real-time Transmission current temperature value makes up temperature-time curve to host computer.Through the beginning of visible light sensor array perception spontaneous combustion, accurately the spontaneous combustion start time is confirmed in timing.After spontaneous combustion finished, the self-ignition temperature that data processing software calculates this sample automatically arrived the respective stored document with ignition lag and derived data.The error of measurement result will reduce greatly in this process, and efficiency of measurement also improves a lot.
Description of drawings
Fig. 1 is the system framework figure of the utility model;
Fig. 2 is the crucible oven cut-away view of the utility model;
Fig. 3 is the overall framework synoptic diagram of the utility model;
Fig. 4 is the power circuit diagram of the micro control system of the utility model;
Fig. 5 is the operating ambient temperature testing circuit figure of the utility model;
Fig. 6 is the key circuit figure of the micro control system of the utility model;
Fig. 7 is the LED display circuit figure of the micro control system of the utility model;
Fig. 8 is the micro control system of the utility model and the serial communication circuit figure of host computer;
Fig. 9 is the accurate A/D modular converter circuit diagram of the micro control system of the utility model;
Figure 10 is the conventional A/D modular converter circuit diagram of the micro control system of the utility model;
Figure 11 is the visible light sensor array circuit figure of the utility model;
Figure 12 is the sensor placement figure of the visible light sensor array of the utility model;
Figure 13 is the wiring circuit diagram of the micro control system of the utility model;
Figure 14 is all power supply power pin mu balanced circuits of the utility model.
Embodiment
Provide the embodiment of the utility model below in conjunction with accompanying drawing, specify the technical scheme of the utility model.
Like Fig. 1, shown in Figure 2, this device comprises temperature control of pot furnace system, analog to digital conversion circuit, host computer disposal system.The temperature control of pot furnace system comprises crucible oven and temperature controller; Analog to digital conversion circuit comprises with the microcontroller being the A/D change-over circuit, power circuit, key circuit, visible light sensor array, telecommunication circuit, LED display circuit etc. of core, and the host computer disposal system is a PC, and crucible oven adopts the ceramic fiber insulation material; With the resistance wire is heating element; Crucible cover 1 left-right symmetric is divided into two parts, middle perforate, and the aperture is decided according to the aperture of putting into flask.After the flask neck clamped, the crucible bell was put into crucible oven together with flask.After flask was put into crucible oven, right angle grass tube 5 was put into flask interior with temperature thermocouple T, and temperature thermocouple T and grass tube 5 all are fixed on the crucible cover 1.The flask periphery is evenly wrapped up by aluminium foil, and simultaneously in flask neck bottom, A is wrapped up with aluminium foil respectively in the outside of flask middle part and bottom, B, and three K type thermocouples of C, the lead-in wire of these three thermopairs is drawn from the groove of crucible cover 1 bottom.Visible light sensor array 3 is arranged on iron stand 2, and the visible light sensor array can be adjusted angle flexibly, and iron stand 2 is placed on the crucible bell 1, guarantees that simultaneously visible light sensor array 3 can see through the hole supervision flask interior situation on the crucible cover.Temperature-control heat couple D is connected on Fig. 1 temperature controller among Fig. 2, and as temperature controlled foundation, D is arranged in crucible oven madial wall centre position.The simultaneous temperature controller passes to the temperature value of thermopair D in the PC through the RS485 interface.T, A, B, the simulating signal that four thermopairs of C produce is carried out digital-to-analog conversion with the simulating signal of baroceptor through analog to digital conversion circuit among Fig. 1, and the digital signal after the conversion passes in the PC through serial ports.
Visible light sensor array 3 is for to constitute photosensitive array by five visible light sensors.Visible light sensor is mainly responsive to visible light, through regulating inner adjustable resistance and adopting epoxide resin nano packaging sensitization part, can eliminate infrared ray and the influence of ultraviolet ray to sensor devices, reaches the effect of similar human eye.In dark surrounds, catch the visible light that occurs, send out corresponding electric signal simultaneously and give microcontroller.Through experiment iron stand clip be arranged in face crucible cover 1 perforate directly over suitable distance.
As shown in Figure 3, the A/D change-over circuit becomes digital signal with analog signal conversion, and digital signal passes to the PC storage through microcontroller and telecommunication circuit afterwards, and these data-signals show through the LED display circuit simultaneously.Power circuit provides power supply for the microcontroller operating circuit.Key circuit is as the action of outside input control microcontroller.The signal that the visible light sensor array produces at first passes to the PC storage through telecommunication circuit through the processing of microcontroller then.Temperature controller is controlled the temperature of crucible oven through temperature-control heat couple, and simultaneously that crucible oven is current temperature passes to PC through the RS485 interface.
As shown in Figure 4; The power circuit part; It has the function of voltage transitions, convert system's required voltage output into behind the high voltage input process voltage stabilizing chip with the outside input, and power circuit has the partial protection function; Stop when externally input voltage is not normal to the control circuit supply of current, protect whole analog to digital conversion circuit not suffer damage.Power circuit comprises power interface J2; Standby power supply interface J1, self-lock switch S2, overcurrent protection switch F1; The first voltage stabilizing diode D13; The first diode D10, the second diode D11, the second triode D12, the first polar capacitor C30, the second polar capacitor C32, the 3rd polar capacitor C34, quadripolarity capacitor C 35, the first nonpolar capacitor C 31, second nonpolar capacitor C the 33, the 3rd nonpolar capacitor C the 36, the 4th nonpolar capacitor C 37; The first light emitting diode D14, the second light emitting diode D15, the 3rd light emitting diode D16, first resistance R 9, second resistance R 10, the 3rd resistance R 11, the 4th resistance R 12.
1 pin of J2 connects 2 pin of self-lock switch S2,2,3 pin of J2 and connect after connect 5 pin of S2.1 pin of S2 connects the anode of the 3rd diode D12, the 6 pin ground connection of S2, and 3,4 pin of S2 are unsettled.The negative electrode of D12 is connected to the end of overcurrent protection switch F1; The other end of F1 is connected to the negative electrode of the first diode D10, the anode of the first polar capacitor C30, the negative electrode of the first voltage stabilizing diode D13, an end of the first nonpolar capacitor C 31 and the input end of voltage stabilizing chip U5; The U5 output terminal connects anode, the negative electrode of the 3rd diode D11, the positive pole of the second polar capacitor C32, second nonpolar capacitor C 33 1 ends of the second diode D10; First resistance R, 9 one ends and VCC8 end; The other end of R9 is connected to the positive pole of the first light emitting diode D14, D14 minus earth.The other end of the earth terminal of the other end of the negative pole of the positive pole of voltage stabilizing diode D13, the first polar capacitor C30, the first nonpolar capacitor C 31, voltage stabilizing chip U5, the negative pole of the second polar capacitor C32, the second nonpolar capacitor C 33 and 2 pin of spare interface J1 are ground connection all.1 pin of spare interface J1 connects the positive pole of D11; The output terminal of voltage stabilizing chip U5 is received voltage stabilizing chip U6 input interface; The U6 output terminal is connected with the positive pole of the 3rd polar capacitor C34, an end of the 3rd nonpolar capacitor C 36 and an end of second resistance R 10; The R10 other end is received the positive pole of the second light emitting diode D15,1 pin of voltage stabilizing chip U5 chip, the negative pole of the 3rd polar capacitor C34, the other end of the 3rd nonpolar capacitor C 36 and the minus earth of the second light emitting diode D15.The U6 output terminal is connected with voltage stabilizing chip U7 input end; The U7 output terminal with to the positive pole of quadripolarity capacitor C 35, an end of the 4th nonpolar capacitor C 37 and an end of the 3rd resistance R 11; The R11 other end is received the positive pole of the 3rd light emitting diode D16,1 interface of voltage stabilizing chip U7, the positive pole of quadripolarity capacitor C 35, the other end of the 4th nonpolar capacitor C 37, the minus earth of the 3rd light emitting diode D16.Power supply ground end links to each other through the 4th resistance R 12 with digital electrical seedbed end.
As shown in Figure 5, temperature sensing circuit, it has the environment temperature measuring ability; Temperature sensor through chip self will install residing environment temperature and output to microcontroller through digital signal; Be ultimately delivered to PC, related warning circuit of while, monitoring environment temperature.Temperature sensing circuit comprises the 5th resistance R 13, the 6th resistance R 14, the five polar capacitor C38, the 5th nonpolar capacitor C 39, thermometric chip U8.The 5th resistance R 13, the 6th resistance R 14 1 ends are connected to power supply VCC3.3,1 pin of the 5th resistance R 13 another termination U8,2 pin of the 6th resistance R 14 another termination thermometric chip U8.4 pin, 5 pin, 6 pin, the 7 pin ground of thermometric chip U8,8 pin meet power supply VCC3.3.1 pin of thermometric chip U8 connects 47 pin of main control chip U1 simultaneously, 2 pin of thermometric chip U8 connect 46 pin of main control chip U1 simultaneously.
As shown in Figure 6, the key circuit part, it has one or more button, is used for to the control system sending controling instruction, and steering order comprises the resetting of starter gear timing, analog to digital conversion circuit, end-of-job etc.Key circuit partly comprises identical first to the 8th button totally 8 buttons, one of pull-up resistor JP1.All eight button one ends are connected with 2 pin to 9 pin of pull-up resistor JP1,79 pin, 80 pin, 78 pin, 1 pin, 53 pin, 52 pin, 14 pin and 13 pin on the main control chip respectively, and the other end of eight buttons is ground connection all.
Shown in Fig. 7 belonged to, the LED display circuit partly comprised the 4th light emitting diode D17, the 5th light emitting diode D18, the 6th light emitting diode D19, the 7th light emitting diode D20, the 8th light emitting diode D21, the 9th light emitting diode D22, the tenth light emitting diode D23, the 11 light emitting diode D24.The first exclusion R15, the second exclusion R16.The whole ground connection of the negative electrode of eight light emitting diodes; Light emitting diode D17, light emitting diode D18, the 6th light emitting diode D19, the 7th light emitting diode D20 are connected with 2 pin, 4 pin, 6 pin, 8 pin of the first exclusion R15 respectively; The 8th light emitting diode D21, the 9th light emitting diode D22, the tenth light emitting diode D23, the 11 light emitting diode D24 are connected with 2 pin, 4 pin, 6 pin, 8 pin of the second exclusion R16 respectively; 1 pin of the first exclusion R15,3 pin, 5 pin, 7 pin are connected with 61 pin, 62 pin, 63 pin, 66 pin of main control chip respectively, and the second exclusion R16 is connected with 67 pin, 68 pin, 69 pin, 54 pin of main control chip respectively.
As shown in Figure 8; The telecommunication circuit part, it has the function of communicating by letter with host computer, can the digital signal after each sensors A/D conversion be sent to host computer; Do further processing and demonstration, thereby needing in the test of liquid chemical self-ignition temperature to obtain the parameter of mensuration.Telecommunication circuit partly comprises the 6th nonpolar capacitor C the 40, the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the 9th nonpolar capacitor C the 43, the tenth nonpolar capacitor C 44,16 pin level transferring chip U10,11 needle serial port USART1.
One end of the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the tenth nonpolar capacitor C 44 links to each other with 16 pin, 2 pin, 6 pin of level U10 respectively, and the other end of the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the tenth nonpolar capacitor C 44 is connected with 15 pin of level transferring chip U10 and ground connection.The 6th capacitor C 40 1 ends connect 1 pin of level transferring chip U10, and the other end connects 3 pin of level transferring chip U10.The 9th electric capacity 43 1 ends connect level transferring chip 4 pins, and the other end connects its 5 pin.13 pin of level transferring chip U10,14 pin are connected with 3 pin, 2 pin of serial ports USART1 respectively.5 pin of serial ports USART1,10 pin, 11 pin ground connection; 16 pin of level transferring chip U10 connect power supply; 11 of level transferring chip U10 is connected with 41 pin of main control chip; 12 of level transferring chip U10 is connected with 42 pin of main control chip, and 7 pin of 1 pin of serial ports USART1,4 pin, 7 pin, 8 pin, 9 pin and level transferring chip U10,8 pin, 9 pin, 10 foot rests are empty.
Like Fig. 9, A/D change-over circuit shown in Figure 10, it has the function that analog signal conversion is become digital signal, can become digital signal corresponding to deliver to microcontroller the analog signal conversion of all sensors of this device and host computer is done further processing.Fig. 9 is said to be 16 or higher A/D change-over circuit, and modulus conversion chip is equipped with accurate reference voltage source, and input end has added filtering circuit and the track to track amplifier carries out signal Processing.This high precision analogue change-over circuit improves sampling precision as the simulating signal sampling of flask interior thermopair T.Figure 10 is said to be 12 A/D change-over circuits, adopts conventional filtering circuit to handle input signal, gathers A, B, C thermopair value, weighs crucible oven closed test environment and whether meets the GB requirement.
Accurate A/D analog to digital conversion circuit; Specifically comprise three master chip U2, U3, U4, magnetic bead FB1, sextupole property capacitor C 16; The 7th polar capacitor C19; The 11 nonpolar capacitor C the 17, the 12 nonpolar capacitor C the 18, the 13 nonpolar capacitor C the 15, the 14 nonpolar capacitor C the 21, the 15 nonpolar capacitor C 20, the second voltage stabilizing diode D1, the 7th resistance R 6.
2 pin of U2 and the positive pole of sextupole property capacitor C 16, the 11 nonpolar capacitor C 17 1 ends and magnetic bead FB1 an end be connected another termination of magnetic bead FB1 VCC.The other end ground connection of the other end of sextupole property capacitor C 16 and the 11 nonpolar capacitor C 17.6 pin of U2 are connected with an end of the 12 nonpolar capacitor C 18,1 pin of U3.The other end ground connection of the 12 nonpolar capacitor C 18; 8 pin of U3 are connected with power supply with an end of the 13 nonpolar capacitor C 15; The other end ground connection of the 13 nonpolar capacitor C 15, the 4 pin ground connection of U3,5 pin of U3 are connected with 10 pin of main control chip U1; 6 pin of U3 are connected with 7 pin of main control chip U1; 7 pin of U3 are connected with 6 pin of main control chip U1, and 1 pin of outer input interface P5 is connected with the end of the negative electrode of the second voltage stabilizing diode D1 with the 7th resistance R 6, external interface P5 and second voltage stabilizing, two utmost point D1 other end ground connection.One end of the 7th resistance R 6 another termination the 14 nonpolar capacitor C 21 and 3 pin of U4, the other end ground connection of the 14 nonpolar capacitor C 21,6 pin of U4 are connected with 2 pin of 2 pin of U4, U3.7 pin of U4 are connected with power supply with an end of the positive pole of the 7th polar capacitor C19, the 15 nonpolar capacitor C 20, the other end ground connection of the negative pole of the 7th polar capacitor C19 and the 15 nonpolar capacitor C 20, and the 4 pin ground connection of U4, all the other pins are built on stilts among the U2U3U4.
Conventional A/D analog to digital conversion circuit specifically comprises the 3rd voltage stabilizing diode D2, the 4th voltage stabilizing diode D3; The 5th voltage stabilizing diode D4, the 6th voltage stabilizing diode D5, the 7th voltage stabilizing diode D6; The 8th voltage stabilizing diode D7, the 9th voltage stabilizing diode D8, the tenth voltage stabilizing diode D9.The nonpolar capacitor C of the 16 nonpolar capacitor C 22, the 17 23, the 18 nonpolar capacitor C 24; The nonpolar capacitor C of the 19 nonpolar capacitor C 25, the 20 26, the 21 nonpolar capacitor C 27; The 22 nonpolar capacitor C 28, the 23 nonpolar capacitor C 29.The 3rd exclusion R11, wiring slot P2.The negative pole of the 3rd voltage stabilizing diode D2, the 4th voltage stabilizing diode D3, the 5th voltage stabilizing diode D4, the 6th voltage stabilizing diode D5, the 7th voltage stabilizing diode D6, the 8th voltage stabilizing diode D7, the 9th voltage stabilizing diode D8, the tenth voltage stabilizing diode D9 is connected with 1 pin, 2 pin, 3 pin, 4 pin, 5 pin, 6 pin, 7 pin, 8 pin of 10 pin, 9 pin, 8 pin, 7 pin, 6 pin, 5 pin, 4 pin, 3 pin and the 3rd exclusion R11 of wiring slot P2 respectively; 1 pin of wiring slot P2,2 pin ground connection; The 16 nonpolar capacitor C the 22, the 17 nonpolar capacitor C the 23, the 18 nonpolar capacitor C the 24, the 19 nonpolar capacitor C the 25, the 20 nonpolar capacitor C the 26, the 21 nonpolar capacitor C the 27, the 22 nonpolar capacitor C the 28, the 23 nonpolar capacitor C 29 is connected with 17 pin, 16 pin, 15 pin, 21 pin, 22 pin, 27 pin, 28 pin, 29 pin of 9 pin, 10 pin, 11 pin, 12 pin, 13 pin, 14 pin, 15 pin, 16 pin and the main control chip U1 of R11 respectively, and the positive pole of diode and the other end of electric capacity be ground connection all.
Shown in figure 11, the visible light sensor array constitutes circular photosensitive array by five visible light sensors.Visible light sensor is mainly responsive to visible light, through regulating inner adjustable resistance and adopting epoxide resin nano packaging sensitization part, can eliminate infrared ray and the influence of ultraviolet ray to sensor devices, reaches the effect of similar human eye.In dark surrounds, catch the visible light that occurs, send out corresponding electric signal simultaneously and give microcontroller.The visible light sensor array is arranged in the suitable distance that faces directly over crucible cover 2 perforates through experiment iron stand anchor clamps.
The visible light sensor array is that five identical circuit comprise 10 resistance, 5 rheostats, 5 visible light sensors, 5 electric capacity, wiring slot P9, wiring slot P10.
The 8th resistance R 25 1 ends connect power supply; The other end of the 8th resistance R 25 is connected with 1 pin of visible light sensor U15 power supply, receives 2 pin of interface slot P9 after 2 pin of the 9th resistance R 30 1 ends and the 24 nonpolar electric capacity capacitor C 62 1 ends, visible light sensor U15 are connected.4 pin of visible light sensor U15 are connected with the pin that R35 remains in the pin with the first slide rheostat R35 interim pins; Slide rheostat R35 is left a pin ground connection; The 24 nonpolar capacitor C 62 other end ground connection, 3 pin of visible light sensor U15 power supply are connected back ground connection with the other end of the 9th resistance R 30.
The tenth resistance R 26 1 ends connect power supply; The other end of the tenth resistance R 26 is connected with 1 pin of visible light sensor U16 power supply, receives 1 pin of interface slot P9 after 2 pin of the 11 resistance R 31 1 ends and the 25 nonpolar capacitor C 63 1 ends, visible light sensor U16 are connected.4 pin of visible light sensor U16 are connected with the pin that R36 remains in the pin with the second slide rheostat R36 interim pins; Slide rheostat R36 is left a pin ground connection; The 25 nonpolar capacitor C 63 other end ground connection, 3 pin of visible light sensor U16 power supply are connected back ground connection with the other end of the 11 resistance R 31.
The 12 resistance R 22 1 ends connect power supply; The other end of the 12 resistance R 22 is connected with 1 pin of visible light sensor U12 power supply, receives 5 pin of interface slot P9 after 2 pin of the 13 resistance R 27 1 ends and the 26 nonpolar capacitor C 59 1 ends, visible light sensor U12 are connected.4 pin of visible light sensor U12 are connected with the pin that R32 remains in the pin with the 3rd slide rheostat R32 interim pins; Slide rheostat R32 is left a pin ground connection; The other end ground connection of the 26 nonpolar capacitor C 59,3 pin of visible light sensor U12 power supply are connected back ground connection with the other end of the 13 resistance R 32.
The 14 resistance R 23 1 ends connect power supply; The other end of the 14 resistance R 23 is connected with 1 pin of visible light sensor U13 power supply, receives 4 pin of interface slot P9 after 2 pin of the 15 resistance R 28 1 ends and the 27 nonpolar capacitor C 60 1 ends, visible light sensor U13 are connected.4 pin of visible light sensor U13 are connected with the pin that R33 remains in the pin with the 4th slide rheostat R33 interim pins; Slide rheostat R33 is left a pin ground connection; The 27 nonpolar capacitor C 60 other end ground connection, 3 pin of visible light sensor U13 power supply are connected back ground connection with the other end of the 15 resistance R 28.
The 16 resistance R 24 1 ends connect power supply; The other end of the 16 resistance R 24 is connected with 1 pin of visible light sensor U14 power supply, receives 3 pin of interface slot P9 after 2 pin of the 17 resistance R 29 1 ends and the 28 nonpolar capacitor C 61 1 ends, visible light sensor U14 are connected.4 pin of visible light sensor U14 are connected with the pin that R34 remains in the pin with the 5th slide rheostat R34 interim pins; Slide rheostat R34 is left a pin ground connection; The other end ground connection of the 28 nonpolar capacitor C 61,3 pin of visible light sensor U14 power supply are connected back ground connection with the other end of the 17 resistance R 29.
1 pin of wiring slot P10 connects power supply, the 2 pin ground connection of wiring slot P10.
Shown in Figure 12, warning circuit comprises the first hummer LS1, the first triode Q1, the tenth resistance R 3.The first triode Q1 emitter is connected with VCC, and the first triode Q1 base stage is connected with an end of the tenth resistance, and the first triode Q1 collector is connected the minus earth of hummer with the positive pole of hummer.
Shown in figure 13; The microcontroller part, it has logic control and arithmetic capability, can accept to control the control signal of button; The input signal of pick-up transducers also carries out analog to digital conversion; Digital signal after the conversion is sent to host computer, and can control the duty of LED indication when prepass, and the control warning circuit is reminded the work at present emergency circumstance.Specifically comprise main control chip U1, contact pin ICSP1, the first crystal oscillator Y1, the 25 nonpolar capacitor C the 7, the 26 nonpolar capacitor C the 8, the 27 nonpolar capacitor C the 12, the 28 nonpolar capacitor C the 13, the 29 nonpolar capacitor C 14.The 11 resistance R the 1, the 12 resistance R the 2, the 13 resistance R the 4, the 14 resistance R 5.The 9th button S1.
The first crystal oscillator Y1 two ends are connected the other end ground connection of the 27 nonpolar capacitor C the 12, the 28 nonpolar capacitor C 13 with an end of the 27 nonpolar capacitor C the 12, the 28 nonpolar capacitor C 13 and 49 pin, 50 pin of main control chip U1 respectively.One end of the 25 nonpolar capacitor C the 7, the 26 nonpolar capacitor C 8 and the 12 resistance R 2 is connected with main control chip 24 pin, C7, C8, R2 other end ground connection.One end ground connection of the 11 resistance R 1; The other end of the 11 resistance R 1 is connected with main control chip 23 pin; The 13 resistance R 4 one termination VCC, the other end of the 13 resistance R 4 is connected C14 other end ground connection with 9 pin of an end, the 29 nonpolar capacitor C 14 1 ends and the main control chip U1 of the 9th button S1; One end of another termination the 14 resistance R 5 of button S1, R5 other end ground connection; 1 pin of contact pin ICSP1 is connected with 9 pin of main control chip U1; 2 pin of contact pin ICSP1 meet VCC, the 3 pin ground connection of contact pin ICSP1, and 4 pin of contact pin ICSP1 are connected with 20 pin of main control chip U1; 5 pin of contact pin ICSP1 are connected with 19 pin of main control chip U1, and 5 pin of contact pin ICSP1 and 6 foot rests are empty.
Shown in Figure 14, power supply stabilization circuit comprises the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and ends of the earth property capacitor C 2.One end of the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and the positive terminal of polar capacitor C2 are connected with VCC.The other end of the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and the minus earth of polar capacitor C2.
When carrying out liquid chemical self-ignition temperature mensuration, at first the crucible oven temperature is adjusted to suitable temperature through temperature controller, this temperature keeps the temperature constant that is delayed to of a period of time normally near the self-ignition temperature of fluid to be measured.Observe thermopair A, B, the indicated temperature value of C, with reference among the GB GB/T 21860-2008 to the requirement of temperature homogeneity, carry out next step test if meet the requirements.Get the 100ul test specimen with syringe, be injected into flask, touch the button on the analog to digital conversion circuit simultaneously, on the time shaft of system temperature collection, do an initial mark through grass tube.Through the supervision of visible light sensor array, when the burning light occurring, array is seen electric signal off and is given microcontroller under dark surrounds; On time shaft, do a time mark again; Moments later stop analog to digital conversion circuit, blow most flask interior residue, prepare next group sample with heat gun.After all data are pooled in the PC 8, be saved in the excel file, data realize temperature-time curve of thermopair T through software programming after being pooled to host computer, and calculate each time point rate of temperature change, select the bigger time point mark of rate of change.Calculate from mistiming of the rate of temperature change maximum that picks up counting as ignition lag and show, the indirect labor begins two mistimings with the visible light sensor arrays of indicia as the ignition lag reference.
This device is built the test unit platform on the basis that meets GB GB/T 21860-2008 fully, and has further improved the automaticity of test macro, has improved the degree of accuracy of test findings.Through warning circuit, LED display circuit etc. make test process more humane.Handle through upper computer software, obtain test findings quickly and efficiently, preserve data, saved manpower and materials, improved efficient.
Claims (1)
1. a liquid chemical self-ignition temperature determinator comprises temperature control of pot furnace system, analog to digital conversion circuit, host computer disposal system, and the temperature control of pot furnace system comprises crucible oven and temperature controller; Analog to digital conversion circuit comprises with the microcontroller being the A/D change-over circuit, power circuit, key circuit, visible light sensor array, telecommunication circuit, LED display circuit etc. of core, and the host computer disposal system is a PC, it is characterized in that: crucible oven adopts the ceramic fiber insulation material; With the resistance wire is heating element, and the crucible cover left-right symmetric is divided into two parts, middle perforate; Match with the aperture of flask in the aperture, right angle grass tube and temperature thermocouple T place flask interior, and temperature thermocouple T and grass tube all are fixed on the crucible cover; The flask periphery is evenly wrapped up by aluminium foil, and in flask neck bottom, A is wrapped up with aluminium foil respectively in the outside of flask middle part and bottom; B, three K type thermocouples of C, the lead-in wire of these three thermopairs is drawn from the groove of crucible cover bottom; The visible light sensor array is arranged on the iron stand, and the visible light sensor array can be adjusted angle flexibly, and iron stand is placed on crucible oven and covers; Guarantee that simultaneously the visible light sensor array can see through the hole supervision flask interior situation on the crucible cover, middle temperature-control heat couple D is connected on the temperature controller, as temperature controlled foundation; D is arranged in crucible oven madial wall centre position, and the simultaneous temperature controller passes in the PC T with the temperature value of thermopair D through the RS485 interface; A; B, the simulating signal that four thermopairs of C produce is carried out digital-to-analog conversion with the simulating signal of baroceptor through analog to digital conversion circuit, and the digital signal after the conversion passes in the PC through serial ports;
The visible light sensor array is for to constitute photosensitive array by five visible light sensors, through experiment iron stand clip be arranged in face the crucible cover perforate directly over;
The A/D change-over circuit becomes digital signal with analog signal conversion; Digital signal passes to the PC storage through microcontroller and telecommunication circuit afterwards; These data-signals show that through the LED display circuit power circuit provides power supply for the microcontroller operating circuit simultaneously, and key circuit is as the action of outside input control microcontroller; The signal that the visible light sensor array produces; At first pass to the PC storage through telecommunication circuit then through the processing of microcontroller, temperature controller is controlled the temperature of crucible oven through temperature-control heat couple, and simultaneously that crucible oven is current temperature passes to PC through the RS485 interface;
The power circuit part branch comprises power interface J2; Standby power supply interface J1; Self-lock switch S2, overcurrent protection switch F1, the first voltage stabilizing diode D13; The first diode D10, the second diode D11, the second triode D12; The first polar capacitor C30, the second polar capacitor C32, the 3rd polar capacitor C34, quadripolarity capacitor C 35, the first nonpolar capacitor C 31, second nonpolar capacitor C the 33, the 3rd nonpolar capacitor C the 36, the 4th nonpolar capacitor C 37, the first light emitting diode D14, the second light emitting diode D15, the 3rd light emitting diode D16; First resistance R 9, second resistance R 10, the 3rd resistance R 11, the 4th resistance R 12; Power interface J2 is a three-pin socket, and 1 pin of J2 connects 2 pin of self-lock switch S2,2,3 pin of J2 and connect after connect 5 pin of S2; 1 pin of S2 connects the anode of the 3rd diode D12; The 6 pin ground connection of S2,3,4 pin of S2 are unsettled, and the negative electrode of D12 is connected to the end of overcurrent protection switch F1; The other end of F1 is connected to the negative electrode of the first diode D10, the anode of the first polar capacitor C30, the negative electrode of the first voltage stabilizing diode D13, an end of the first nonpolar capacitor C 31 and the input end of voltage stabilizing chip U5; The U5 output terminal connects anode, the negative electrode of the 3rd diode D11, the positive pole of the second polar capacitor C32, second nonpolar capacitor C 33 1 ends of the second diode D10, first resistance R, 9 one ends and VCC8 end, and the other end of R9 is connected to the positive pole of the first light emitting diode D14; The D14 minus earth; The other end of the earth terminal of the other end of the negative pole of the positive pole of voltage stabilizing diode D13, the first polar capacitor C30, the first nonpolar capacitor C 31, voltage stabilizing chip U5, the negative pole of the second polar capacitor C32, the second nonpolar capacitor C 33 and 2 pin of spare interface J1 are ground connection all, and 1 pin of spare interface J1 connects the positive pole of D11, and the output terminal of voltage stabilizing chip U5 is received voltage stabilizing chip U6 input interface; The U6 output terminal is connected with the positive pole of the 3rd polar capacitor C34, an end of the 3rd nonpolar capacitor C 36 and an end of second resistance R 10; The R10 other end is received the positive pole of the second light emitting diode D15,1 pin of voltage stabilizing chip U5 chip, the negative pole of the 3rd polar capacitor C34, the other end of the 3rd nonpolar capacitor C 36 and the minus earth of the second light emitting diode D15, and the U6 output terminal is connected with voltage stabilizing chip U7 input end; The U7 output terminal with to the positive pole of quadripolarity capacitor C 35, an end of the 4th nonpolar capacitor C 37 and an end of the 3rd resistance R 11; The R11 other end is received the positive pole of the 3rd light emitting diode D16,1 interface of voltage stabilizing chip U7, the positive pole of quadripolarity capacitor C 35, the other end of the 4th nonpolar capacitor C 37, the minus earth of the 3rd light emitting diode D16, and power supply ground end links to each other through the 4th resistance R 12 with digital electrical seedbed end;
Temperature sensing circuit comprises the 5th resistance R 13, the 6th resistance R 14; The 5th polar capacitor C38, the 5th nonpolar capacitor C 39, thermometric chip U8; The 5th resistance R 13, the 6th resistance R 14 1 ends are connected to power supply VCC3.3; 1 pin of the 5th resistance R 13 another termination U8,2 pin of the 6th resistance R 14 another termination thermometric chip U8,4 pin, 5 pin, 6 pin, the 7 pin ground of thermometric chip U8; 8 pin meet power supply VCC3.3, and 1 pin of thermometric chip U8 connects 47 pin of main control chip U1 simultaneously, 2 pin of thermometric chip U8 connect 46 pin of main control chip U1 simultaneously;
Key circuit partly comprises identical first to the 8th button totally 8 buttons; One of pull-up resistor JP1; All eight button one ends are connected with 2 pin to 9 pin of pull-up resistor JP1,79 pin, 80 pin, 78 pin, 1 pin, 53 pin, 52 pin, 14 pin and 13 pin on the main control chip respectively, and the other end of eight buttons is ground connection all;
The LED display circuit partly comprises the 4th light emitting diode D17, the 5th light emitting diode D18, the 6th light emitting diode D19, the 7th light emitting diode D20, the 8th light emitting diode D21, the 9th light emitting diode D22, the tenth light emitting diode D23, the 11 light emitting diode D24; The first exclusion R15; The second exclusion R16; The whole ground connection of the negative electrode of eight light emitting diodes; Light emitting diode D17, light emitting diode D18, the 6th light emitting diode D19, the 7th light emitting diode D20 are connected with 2 pin, 4 pin, 6 pin, 8 pin of the first exclusion R15 respectively; The 8th light emitting diode D21, the 9th light emitting diode D22, the tenth light emitting diode D23, the 11 light emitting diode D24 are connected with 2 pin, 4 pin, 6 pin, 8 pin of the second exclusion R16 respectively; 1 pin of the first exclusion R15,3 pin, 5 pin, 7 pin are connected with 61 pin, 62 pin, 63 pin, 66 pin of main control chip respectively, and the second exclusion R16 is connected with 67 pin, 68 pin, 69 pin, 54 pin of main control chip respectively;
Telecommunication circuit partly comprises the 6th nonpolar capacitor C the 40, the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the 9th nonpolar capacitor C the 43, the tenth nonpolar capacitor C 44,16 pin level transferring chip U10,11 needle serial port USART1;
One end of the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the tenth nonpolar capacitor C 44 links to each other with 16 pin, 2 pin, 6 pin of level U10 respectively; The other end of the 7th nonpolar capacitor C the 41, the 8th nonpolar capacitor C the 42, the tenth nonpolar capacitor C 44 is connected with 15 pin of level transferring chip U10 and ground connection; The 6th capacitor C 40 1 ends connect 1 pin of level transferring chip U10; The other end connects 3 pin of level transferring chip U10, and the 9th electric capacity 43 1 ends connect level transferring chip 4 pins, and the other end connects its 5 pin; 13 pin of level transferring chip U10,14 pin are connected with 3 pin, 2 pin of serial ports USART1 respectively; 5 pin of serial ports USART1,10 pin, 11 pin ground connection, 16 pin of level transferring chip U10 connect power supply, and 11 of level transferring chip U10 is connected with 41 pin of main control chip; 12 of level transferring chip U10 is connected with 42 pin of main control chip, and 7 pin of 1 pin of serial ports USART1,4 pin, 7 pin, 8 pin, 9 pin and level transferring chip U10,8 pin, 9 pin, 10 foot rests are empty;
Accurate A/D analog to digital conversion circuit comprises three master chip U2, U3, U4; Magnetic bead FB1; Sextupole property capacitor C 16, the seven polar capacitor C19, the 11 nonpolar capacitor C the 17, the 12 nonpolar capacitor C the 18, the 13 nonpolar capacitor C the 15, the 14 nonpolar capacitor C the 21, the 15 nonpolar capacitor C 20; The second voltage stabilizing diode D1, the 7th resistance R 6;
2 pin of U2 and the positive pole of sextupole property capacitor C 16, the 11 nonpolar capacitor C 17 1 ends and magnetic bead FB1 an end be connected another termination of magnetic bead FB1 VCC, the other end ground connection of the other end of sextupole property capacitor C 16 and the 11 nonpolar capacitor C 17; 6 pin of U2 are connected with an end of the 12 nonpolar capacitor C 18,1 pin of U3, the other end ground connection of the 12 nonpolar capacitor C 18, and 8 pin of U3 are connected with power supply with an end of the 13 nonpolar capacitor C 15; The other end ground connection of the 13 nonpolar capacitor C 15; The 4 pin ground connection of U3,5 pin of U3 are connected with 10 pin of main control chip U1, and 6 pin of U3 are connected with 7 pin of main control chip U1; 7 pin of U3 are connected with 6 pin of main control chip U1; 1 pin of outer input interface P5 is connected with the end of the negative electrode of the second voltage stabilizing diode D1 with the 7th resistance R 6, external interface P5 and second voltage stabilizing, two utmost point D1 other end ground connection, an end of the 7th resistance R 6 another termination the 14 nonpolar capacitor C 21 and 3 pin of U4; The other end ground connection of the 14 nonpolar capacitor C 21; 6 pin of U4 are connected with 2 pin of 2 pin of U4, U3, and 7 pin of U4 are connected with power supply with an end of the positive pole of the 7th polar capacitor C19, the 15 nonpolar capacitor C 20, the other end ground connection of the negative pole of the 7th polar capacitor C19 and the 15 nonpolar capacitor C 20; The 4 pin ground connection of U4, all the other pins are built on stilts among the U2U3U4;
Conventional A/D analog to digital conversion circuit comprises the 3rd voltage stabilizing diode D2; The 4th voltage stabilizing diode D3, the 5th voltage stabilizing diode D4, the 6th voltage stabilizing diode D5; The 7th voltage stabilizing diode D6; The 8th voltage stabilizing diode D7, the 9th voltage stabilizing diode D8, the tenth voltage stabilizing diode D9; The 16 nonpolar capacitor C 22; The nonpolar capacitor C of the 17 nonpolar capacitor C 23, the 18 24, the 19 nonpolar capacitor C 25; The 20 nonpolar capacitor C 26; The nonpolar capacitor C of the 21 nonpolar capacitor C 27, the 22 28, the 23 nonpolar capacitor C 29; The 3rd exclusion R11; Wiring slot P2, the negative pole of the 3rd voltage stabilizing diode D2, the 4th voltage stabilizing diode D3, the 5th voltage stabilizing diode D4, the 6th voltage stabilizing diode D5, the 7th voltage stabilizing diode D6, the 8th voltage stabilizing diode D7, the 9th voltage stabilizing diode D8, the tenth voltage stabilizing diode D9 are connected 1 pin of wiring slot P2,2 pin ground connection with 1 pin, 2 pin, 3 pin, 4 pin, 5 pin, 6 pin, 7 pin, 8 pin of 10 pin, 9 pin, 8 pin, 7 pin, 6 pin, 5 pin, 4 pin, 3 pin and the 3rd exclusion R11 of wiring slot P2 respectively; The 16 nonpolar capacitor C the 22, the 17 nonpolar capacitor C the 23, the 18 nonpolar capacitor C the 24, the 19 nonpolar capacitor C the 25, the 20 nonpolar capacitor C the 26, the 21 nonpolar capacitor C the 27, the 22 nonpolar capacitor C the 28, the 23 nonpolar capacitor C 29 is connected with 17 pin, 16 pin, 15 pin, 21 pin, 22 pin, 27 pin, 28 pin, 29 pin of 9 pin, 10 pin, 11 pin, 12 pin, 13 pin, 14 pin, 15 pin, 16 pin and the main control chip U1 of R11 respectively, and the positive pole of diode and the other end of electric capacity be ground connection all;
The visible light sensor array comprises 10 resistance, 5 rheostats, 5 visible light sensors, 5 electric capacity, wiring slot P9, wiring slot P10;
The 8th resistance R 25 1 ends connect power supply; The other end of the 8th resistance R 25 is connected with 1 pin of visible light sensor U15 power supply; After being connected, receive on 2 pin of the 9th resistance R 30 1 ends and the 24 nonpolar electric capacity capacitor C 62 1 ends, visible light sensor U15 2 pin of interface slot P9; 4 pin of visible light sensor U15 are connected with the pin that R35 remains in the pin with the first slide rheostat R35 interim pins; Slide rheostat R35 is left a pin ground connection, the 24 nonpolar capacitor C 62 other end ground connection, and 3 pin of visible light sensor U15 power supply are connected back ground connection with the other end of the 9th resistance R 30;
The tenth resistance R 26 1 ends connect power supply; The other end of the tenth resistance R 26 is connected with 1 pin of visible light sensor U16 power supply; After being connected, receive on 2 pin of the 11 resistance R 31 1 ends and the 25 nonpolar capacitor C 63 1 ends, visible light sensor U16 1 pin of interface slot P9; 4 pin of visible light sensor U16 are connected with the pin that R36 remains in the pin with the second slide rheostat R36 interim pins; Slide rheostat R36 is left a pin ground connection, the 25 nonpolar capacitor C 63 other end ground connection, and 3 pin of visible light sensor U16 power supply are connected back ground connection with the other end of the 11 resistance R 31;
The 12 resistance R 22 1 ends connect power supply; The other end of the 12 resistance R 22 is connected with 1 pin of visible light sensor U12 power supply; After being connected, receive on 2 pin of the 13 resistance R 27 1 ends and the 26 nonpolar capacitor C 59 1 ends, visible light sensor U12 5 pin of interface slot P9; 4 pin of visible light sensor U12 are connected with the pin that R32 remains in the pin with the 3rd slide rheostat R32 interim pins; Slide rheostat R32 is left a pin ground connection, the other end ground connection of the 26 nonpolar capacitor C 59, and 3 pin of visible light sensor U12 power supply are connected back ground connection with the other end of the 13 resistance R 32;
The 14 resistance R 23 1 ends connect power supply; The other end of the 14 resistance R 23 is connected with 1 pin of visible light sensor U13 power supply; After being connected, receive on 2 pin of the 15 resistance R 28 1 ends and the 27 nonpolar capacitor C 60 1 ends, visible light sensor U13 4 pin of interface slot P9; 4 pin of visible light sensor U13 are connected with the pin that R33 remains in the pin with the 4th slide rheostat R33 interim pins; Slide rheostat R33 is left a pin ground connection, the 27 nonpolar capacitor C 60 other end ground connection, and 3 pin of visible light sensor U13 power supply are connected back ground connection with the other end of the 15 resistance R 28;
The 16 resistance R 24 1 ends connect power supply; The other end of the 16 resistance R 24 is connected with 1 pin of visible light sensor U14 power supply; After being connected, receive on 2 pin of the 17 resistance R 29 1 ends and the 28 nonpolar capacitor C 61 1 ends, visible light sensor U14 3 pin of interface slot P9; 4 pin of visible light sensor U14 are connected with the pin that R34 remains in the pin with the 5th slide rheostat R34 interim pins; Slide rheostat R34 is left a pin ground connection, the other end ground connection of the 28 nonpolar capacitor C 61, and 3 pin of visible light sensor U14 power supply are connected back ground connection with the other end of the 17 resistance R 29;
1 pin of wiring slot P10 connects power supply, the 2 pin ground connection of wiring slot P10;
Warning circuit comprises the first hummer LS1, the first triode Q1, the tenth resistance R 3; The first triode Q1 emitter is connected with VCC; The first triode Q1 base stage is connected with an end of the tenth resistance, and the first triode Q1 collector is connected the minus earth of hummer with the positive pole of hummer;
Microcontroller comprises main control chip U1; Contact pin ICSP1; The first crystal oscillator Y1; The nonpolar capacitor C of the nonpolar capacitor C of the nonpolar capacitor C of the nonpolar capacitor C of the 25 nonpolar capacitor C the 7, the 26 the 8, the 27 the 12, the 28 the 13, the 29 14, the 11 resistance R the 1, the 12 resistance R the 2, the 13 resistance R the 4, the 14 resistance R 5, the nine button S1;
The first crystal oscillator Y1 two ends are connected with an end of the 27 nonpolar capacitor C the 12, the 28 nonpolar capacitor C 13 and 49 pin, 50 pin of main control chip U1 respectively; The other end ground connection of the 27 nonpolar capacitor C the 12, the 28 nonpolar capacitor C 13; One end of the 25 nonpolar capacitor C the 7, the 26 nonpolar capacitor C 8 and the 12 resistance R 2 is connected with main control chip 24 pin, C7, C8, R2 other end ground connection, an end ground connection of the 11 resistance R 1; The other end of the 11 resistance R 1 is connected with main control chip 23 pin; The 13 resistance R 4 one termination VCC, the other end of the 13 resistance R 4 is connected C14 other end ground connection with 9 pin of an end, the 29 nonpolar capacitor C 14 1 ends and the main control chip U1 of the 9th button S1; One end of another termination the 14 resistance R 5 of button S1, R5 other end ground connection; 1 pin of contact pin ICSP1 is connected with 9 pin of main control chip U1; 2 pin of contact pin ICSP1 meet VCC, the 3 pin ground connection of contact pin ICSP1, and 4 pin of contact pin ICSP1 are connected with 20 pin of main control chip U1; 5 pin of contact pin ICSP1 are connected with 19 pin of main control chip U1, and 5 pin of contact pin ICSP1 and 6 foot rests are empty;
Power supply stabilization circuit comprises the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and ends of the earth property capacitor C 2; One end of the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and the positive terminal of polar capacitor C2 are connected with VCC, the other end of the 30 nonpolar capacitor C the 1, the 31 nonpolar capacitor C 3 and the minus earth of polar capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204881787U CN202330321U (en) | 2011-11-30 | 2011-11-30 | Device for determining spontaneous ignition temperature of liquid chemical |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204881787U CN202330321U (en) | 2011-11-30 | 2011-11-30 | Device for determining spontaneous ignition temperature of liquid chemical |
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| CN202330321U true CN202330321U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204881787U Withdrawn - After Issue CN202330321U (en) | 2011-11-30 | 2011-11-30 | Device for determining spontaneous ignition temperature of liquid chemical |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495097A (en) * | 2011-11-30 | 2012-06-13 | 杭州量泰科技有限公司 | Detection apparatus for liquid chemical product spontaneous combustion temperature |
| CN109374669A (en) * | 2018-10-11 | 2019-02-22 | 公安部天津消防研究所 | A kind of hot surface ignites experimental provision |
-
2011
- 2011-11-30 CN CN2011204881787U patent/CN202330321U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495097A (en) * | 2011-11-30 | 2012-06-13 | 杭州量泰科技有限公司 | Detection apparatus for liquid chemical product spontaneous combustion temperature |
| CN102495097B (en) * | 2011-11-30 | 2013-10-23 | 杭州量泰科技有限公司 | Detection apparatus for liquid chemical product spontaneous combustion temperature |
| CN109374669A (en) * | 2018-10-11 | 2019-02-22 | 公安部天津消防研究所 | A kind of hot surface ignites experimental provision |
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