CN103616343A - Portable melamine detector - Google Patents
Portable melamine detector Download PDFInfo
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- CN103616343A CN103616343A CN201310673300.1A CN201310673300A CN103616343A CN 103616343 A CN103616343 A CN 103616343A CN 201310673300 A CN201310673300 A CN 201310673300A CN 103616343 A CN103616343 A CN 103616343A
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Abstract
The invention discloses a portable melamine detector which comprises a controller module, a power supply management module, a communication module, a memory module, a signal acquisition module, a light source module and an input/output module, wherein the controller module is used for lighting an LED (Light Emitting Diode) according to input of a matrix keyboard; light wave emitted from the LED lamp passes through a colorimetric vessel with melamine; a part of the light wave is absorbed, and the rest light source radiates to a photoelectric sensor; the photoelectric sensor is used for converting light signals into voltage signals; the controller is used for converting the voltage signals into digital signals according to an AD (Analog-to-Digital) converter integrated inside; the digital signals are processed by internal programs; the concentration information is displayed on a liquid crystal screen; the memory module is used for storing the data in the process for later use; a RS232 interface and a JTAG (Joint Test Action Group) interface in the communication module are used for transmitting data among external computers. The portable melamine detector is small in size, low in cost and convenient to carry over, and is completely applicable to application in daily life.
Description
Technical field
The invention belongs to embedded system technology field, be specifically related to a kind of portable melamine detector.
Background technology
Melamine is a kind of nitrogenous industrial chemicals, widespread use and coating, plastics, bonding agent, in the commercial production such as weaving, papermaking, it is a kind of poisonous and hazardous chemical substance, very harmful to human body, especially to human body renal function, very easily cause renal failure.Melamine pollutes very serious at home, especially at Dairy Industry, if mix melamine in milk powder, very easily causes baby's kidney stone, even dead.Shijiazhuang, Hebei Sanlu " malicious milk powder " event causes national many babies to suffer from kidney stone, and death even occurs, and has caused the whole nation and global shock.State General Administration for Quality Supervision has detected the melamine of different content to 109 Dairy Enterprises in the whole nation ，You22Jia baby milk powder manufacturing enterprise that tests, and as can be seen here, the problem of preventing and treating of melamine is very urgent.Existing melamine detecting instrument mainly contains two kinds, a kind of is to adopt liquid phase chromatography and these two kinds of methods of enzyme linked immunosorbent assay to set up, the instrument that adopts these two kinds of methods to set up, can carry out quantitatively, measure qualitatively, but instrument price is very expensive, volume is larger, is only suitable for using in laboratory, and needs professional to use; Another kind is the collaurum quick measuring card based on colloidal gold immunochromatographimethod technology, and the method can accomplish qualitatively judge but cannot complete quantitative detection.
Summary of the invention
The present invention be directed to the deficiency of current melamine detector, proposed a kind of portable melamine detector based on spectrophotometric principles.
Spectrophotometric method is by measuring the absorbance of measured matter light in certain wave strong point or certain wavelength coverage, this material is carried out to the method for qualitative and quantitative analysis.
The present invention includes controller module, power management module, communication module, memory module, signal acquisition module, light source module and input/output module.Power module comprises 5V voltage conversion circuit and 3.3V voltage conversion circuit; Communication module comprises jtag interface and RS232 serial interface switching circuit; Input/output module comprises liquid crystal interface circuit and matrix keyboard.5V power-switching circuit provides power supply for liquid crystal interface; 3.3V power-switching circuit provides power supply for all the other modules.Light source module adopts ultra-bright LED lamp, and its wavelength coverage is less, can be absorbed by melamine.Controller module is lighted this LED according to the input of matrix keyboard, the light wave that LED lamp sends is by being placed with the cuvette of melamine, part light wave is absorbed, remaining light sources is irradiated on the photoelectric sensor of signal acquisition module, photoelectric sensor is converted to voltage signal by light signal, and semaphore is sent to controller, controller is according to the integrated AD converter in inside, voltage signal is converted into digital signal, and the processing of process controller internal processes, the concentration value of melamine is presented in outside LCD screen.When being used for storing the data of this process to needing, memory module calls; RS232 interface in communication module and jtag interface for and outer computer between transmit data.
Described controller module comprises processor U1A STM32F103VBH6, the first crystal oscillator X1, the second crystal oscillator X2, the second resistance R 2, the 3rd resistance R 3, the first single-pole double-throw switch (SPDT) SW1, the second single-pole double-throw switch (SPDT) SW2, the first filter capacitor C1, the second filter capacitor C2, the 6th filter capacitor C6, the tenth filter capacitor C10, the 11 filter capacitor C11, the 12 filter capacitor C12, the 13 filter capacitor C13, the 14 filter capacitor C14, the 15 filter capacitor C15.8 pins of processor U1A STM32F103VBH6, one end of the first crystal oscillator X1 are connected with one end of the first filter capacitor C1; 9 pins of processor U1A STM32F103VBH6, the other end of the first crystal oscillator X1 are connected with one end of the second filter capacitor C2; The other end ground connection of the first filter capacitor C1; The other end ground connection of the second filter capacitor C2; 12 pins of processor U1A STM32F103VBH6, one end of the second crystal oscillator X2 are connected with one end of the 6th filter capacitor C6; 13 pins of processor U1A STM32F103VBH6, the other end of the second crystal oscillator X2 are connected with one end of the tenth filter capacitor C10; The other end ground connection of the 6th filter capacitor C6; The other end ground connection of the tenth filter capacitor C10; 37 pins of processor U1A STM32F103VBH6 are connected with one end of the second resistance R 2; The other end of the second resistance R 2 is connected with 2 pins of the first single-pole double-throw switch (SPDT) SW1; The 3 pin ground connection of the first single-pole double-throw switch (SPDT) SW1; 1 pin of the first single-pole double-throw switch (SPDT) SW1 is connected with VDD3.3; 94 pins of processor U1A STM32F103VBH6 are connected with one end of the 3rd resistance R 3; The other end of the 3rd resistance R 3 is connected with 2 pins of the second single-pole double-throw switch (SPDT) SW2; The 3 pin ground connection of the second single-pole double-throw switch (SPDT) SW2; 1 pin of the second single-pole double-throw switch (SPDT) SW2 is connected with VDD3.3; One end of the 11 filter capacitor C11, the 12 one end of filter capacitor C12, one end of the 13 filter capacitor C13, the 14 one end of filter capacitor C14, one end of the 15 filter capacitor C15 are connected with VDD3.3; The 11 other end of filter capacitor C11, the other end of the 12 filter capacitor C12, the 13 other end of filter capacitor C13, the other end of the 14 filter capacitor C14, the 15 filter capacitor C15 other end be connected and ground connection.
Described 5V voltage conversion circuit comprises 12V lithium battery, power management chip U2 LM2596S, the 3rd polar capacitor C3, quadripolarity capacitor C 4, the first inductance L 1, the first voltage stabilizing diode D1.1 pin of power management chip U2 LM2596S, the anode of the 3rd polar capacitor C3 are connected with VDD12; The negative electrode of 3 pins of power management chip U2 LM2596S, 5 pins, the 3rd polar capacitor C3, the first anode of voltage stabilizing diode D1, the negative electrode of quadripolarity capacitor C 4 are connected and ground connection; 2 pins of power management chip U2 LM2596S, the negative electrode of the first voltage stabilizing diode D1 are connected with one end of the first inductance L 1; 4 pins of power management chip U2 LM2596S, first other end of inductance L 1, the anode of quadripolarity capacitor C 4 are connected with VDD5.0.
Described 3.3V voltage conversion circuit comprises U4 LD1086D2M33, the 7th polar capacitor C7, ends of the earth property capacitor C 8, the 9th filter capacitor C9.U4 LD1086D2M33DE 1 pin, the 7th negative electrode of polar capacitor C7, the negative electrode of ends of the earth property capacitor C 8 are connected with one end of the 9th filter capacitor C9 and ground connection; U4 LD1086D2M33DE 2 pins, the anode of ends of the earth property capacitor C 8, the other end of the 9th filter capacitor C9 are connected with VDD3.3; The anode of U4 LD1086D2M33DE 3 pins, the 7th polar capacitor C7 is connected with VDD5.0.
Communication module comprises Jtag interface circuit and RS232 level shifting circuit.
Described Jtag interface circuit comprises Jtag interface CON1, the 13 resistance R the 13, the 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 17 resistance R 17.The 13 one end of resistance R 13, one end of the 14 resistance R 14, the 15 one end of resistance R 15,1 pin of one end of the 16 resistance R 16, Jtag interface CON1,2 pins be connected with VDD3.3; The 16 other end of resistance R 16,3 pins of one end of the 17 resistance R 17, Jtag interface CON1 be connected with the PB4 pin of processor U1A STM32F103VBH6; 4 pins of Jtag interface CON1 are connected with the other end of the 17 resistance R 17; 5 pins of the other end of the 15 resistance R 15, Jtag interface CON1 are connected with the PA15 pin of processor U1A STM32F103VBH6; 7 pins of the other end of the 14 resistance R 14, Jtag interface CON1 are connected with the PA13 pin of processor U1A STM32F103VBH6; 9 pins of the other end of the 13 resistance R 13, Jtag interface CON1 are connected with the PA14 pin of processor U1A STM32F103VBH6; 6 pins of Jtag interface CON1 are connected with the PB3 pin of processor U1A STM32F103VBH6; 8 pins of Jtag interface CON1,10 pins are connected and ground connection.
Described RS232 level shifting circuit comprises level transferring chip U6 MAX3232, the 19 filter capacitor C19, the 20 filter capacitor C20, the 21 filter capacitor C21, the 22 filter capacitor C22 and serial ports COM1.7 pins of level transferring chip U6 MAX3232,8 pins, 9 pins, 10 pins are maked somebody a mere figurehead; 16 pins of level transferring chip U6 MAX3232 are connected with VDD3.3; 1 pin of level transferring chip U6 MAX3232 is connected with one end of the 19 filter capacitor C19; 3 pins of level transferring chip U6 MAX3232 are connected with the other end of the 19 filter capacitor C19; 4 pins of level transferring chip U6 MAX3232 are connected with one end of the 22 filter capacitor C22; 5 pins of level transferring chip U6 MAX3232 are connected with the other end of the 22 filter capacitor C22; 2 pins of level transferring chip U6 MAX3232 are connected with one end of the 21 filter capacitor C21; 6 pins of level transferring chip U6 MAX3232 are connected with one end of the 20 filter capacitor C20; 15 pins of level transferring chip U6 MAX3232, the 21 other end of filter capacitor C21, the other end of the 20 filter capacitor C20 are connected and ground connection; 11 pins of level transferring chip U6 MAX3232 are connected with the PA2 pin of processor U1A STM32F103VBH6; 12 pins of level transferring chip U6 MAX3232 are connected with the PA3 pin of processor U1A STM32F103VBH6; 14 pins of level transferring chip U6 MAX3232 are connected with 2 pins of COM1; 13 pins of level transferring chip U6 MAX3232 are connected with 3 pins of COM1; The 5 pin ground connection of COM1; All the other pins of COM1 are built on stilts.
Described light source module comprises the first resistance R 1, triode Q1, LED lamp DS1.One end of the first resistance R 1 is connected with VDD3.3; The other end of the first resistance R 1 is connected with 1 pin of triode Q1; The PA8 pin of processor U1A STM32F103VBH6 is connected with 2 pins of triode Q1; 1 pin of LED lamp DS1 is connected with 3 pins of triode Q1; The 2 pin ground connection of LED lamp DS1.
Described signal acquisition module comprises photoelectric sensor U3 OTP101, the 8th filter capacitor C8.1 pin of photoelectric sensor U3 OTP101, one end of the 8th filter capacitor C8 are connected with VDD3.3; The other end of the 8th filter capacitor C8 is connected with 3 pins of photoelectric sensor U3 OTP101 and ground connection; 4 pins of photoelectric sensor U3 OTP101,5 pins are connected with the PA0 pin of processor U1A STM32F103VBH6; The 8 pin ground connection of photoelectric sensor U3 OTP101; 2 pins of photoelectric sensor U3 OTP101,6 pins are maked somebody a mere figurehead.
Described memory module comprises storage chip U5 AT45DB161D, the 4th resistance R 4, the 5th resistance R the 5, the 16 filter capacitor C16.1 pin of storage chip U5 AT45DB161D is connected with the PA7 pin of processor U1A STM32F103VBH6; 2 pins of storage chip U5 AT45DB161D are connected with the PA5 pin of processor U1A STM32F103VBH6; 4 pins of storage chip U5 AT45DB161D are connected with the PA4 pin of processor U1A STM32F103VBH6; 8 pins of storage chip U5 AT45DB161D are connected with the PA6 pin of processor U1A STM32F103VBH6; The 7 pin ground connection of storage chip U5 AT45DB161D; 6 pins of storage chip U5 AT45DB161D, one end of the 4th resistance R 4, the 5th one end of resistance R 5, one end of the 16 filter capacitor C16 are connected with VDD3.3; 3 pins of storage chip U5 AT45DB161D are connected with the other end of the 4th resistance R 4; 5 pins of storage chip U5 AT45DB161D, the other end of the 5th resistance R 5 are connected with the PA1 pin of processor U1A STM32F103VBH6; The other end ground connection of the 16 filter capacitor C16.
Described input/output module comprises the first switch S 1, second switch S2, the 3rd switch S 3, the 4th switch S 4, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R the 11, the 17 filter capacitor C17, the 18 filter capacitor C18 and liquid crystal display socket JP1.One end of one end of one end of the first switch S 1, the 3rd switch S 3, the tenth resistance R 10 is connected with the PD12 pin of processor U1A STM32F103VBH6; One end of second switch S2, the 4th one end of switch S 4, one end of the 11 resistance R 11 are connected with the PD11 pin of processor U1A STM32F103VBH6; One end of the other end of the other end of the first switch S 1, second switch S2, the 7th resistance R 7 is connected with the PD13 pin of processor U1A STM32F103VBH6; One end of the other end of the other end of the 3rd switch S 3, the 4th switch S 4, the 8th resistance R 8 is connected with the PD14 pin of processor U1A STM32F103VBH6; The other end of the tenth resistance R 10, the 11 other end of resistance R 11 and one end of the 18 filter capacitor C18 are connected and ground connection; The other end of the 7th resistance R 7, the 8th other end of resistance R 8, the other end of the 18 filter capacitor C18 are connected with VDD3.3.The 1 pin ground connection of liquid crystal socket JP1; 2 pins of liquid crystal socket JP1, the 6th one end of resistance R 6, one end of the 17 filter capacitor C17 are connected with VDD5.0; 3 pins of liquid crystal socket JP1, the other end of the 6th resistance R 6 are connected with one end of the 9th resistance R 9; 4 pins of liquid crystal socket JP1 are connected with the PD10 pin of processor U1A STM32F103VBH6; 5 pins of liquid crystal socket JP1 are connected with the PD9 pin of processor U1A STM32F103VBH6; 6 pins of liquid crystal socket JP1 are connected with the PD8 pin of processor U1A STM32F103VBH6; 7 pins of liquid crystal socket JP1 are connected with the PD7 pin of processor U1A STM32F103VBH6; 8 pins of liquid crystal socket JP1 are connected with the PD6 pin of processor U1A STM32F103VBH6; 9 pins of liquid crystal socket JP1 are connected with the PD5 pin of processor U1A STM32F103VBH6; 10 pins of liquid crystal socket JP1 are connected with the PD4 pin of processor U1A STM32F103VBH6; 11 pins of liquid crystal socket JP1 are connected with the PD3 pin of processor U1A STM32F103VBH6; 12 pins of liquid crystal socket JP1 are connected with the PD2 pin of processor U1A STM32F103VBH6; 13 pins of liquid crystal socket JP1 are connected with the PD1 pin of processor U1A STM32F103VBH6; 14 pins of liquid crystal socket JP1 are connected with the PD0 pin of processor U1A STM32F103VBH6; 15 pins of liquid crystal socket JP1, the 9th other end of resistance R 9 and the other end of the 17 filter capacitor C17 are connected and ground connection; 16 pins and the VDD5.0 of liquid crystal socket JP1.
Beneficial effect of the present invention: detector volume of the present invention is little easy to carry, the concentration to melamine that can be qualitative, quantitative detects; Meanwhile, this equipment adopts embedded technology, and system power dissipation is low, simple to operate, low price.This equipment has the functions such as collection, processing, preservation and online demonstration, can fully meet the needs of average family.
Accompanying drawing explanation.
Fig. 1 is hardware configuration schematic diagram of the present invention.
Fig. 2 is main overhaul flow chart of the present invention.
Fig. 3 is control module circuit theory diagrams of the present invention.
Fig. 4 is 5V voltage conversion circuit schematic diagram of the present invention.
Fig. 5 is 3.3V voltage conversion circuit schematic diagram of the present invention.
Fig. 6 is Jtag interface circuit schematic diagram in communication module of the present invention.
Fig. 7 is level shifting circuit schematic diagram in communication module of the present invention.
Fig. 8 is light source module circuit theory diagrams of the present invention.
Fig. 9 is signal acquisition module circuit theory diagrams of the present invention.
Figure 10 is memory module circuit theory diagrams of the present invention.
Figure 11 is input/output module circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, modules in the present invention is done to specific description.
As shown in Figure 1, the present invention includes controller module 1, power management module 2, communication module 3, light source module 4, signal acquisition module 5, memory module 6 and input/output module 7.Power module comprises 5V voltage conversion circuit 2-2 and 3.3V voltage conversion circuit 2-1; Communication module 3 comprises jtag interface circuit 3-1 and RS232 serial interface switching circuit 3-2; Input/output module 7 comprises liquid crystal interface circuit 7-1 and matrix keyboard 7-2.5V power-switching circuit 2-2 provides power supply for liquid crystal interface circuit 7-1; 3.3V power-switching circuit provides power supply for all the other modules.Light source module 4 adopts ultra-bright LED lamp, its wavelength coverage is less, controller module 1 is lighted this LED according to the input of matrix keyboard 7-2, the light wave that LED lamp sends is by being placed with the cuvette of melamine, part light wave is absorbed, remaining light sources is irradiated on the photoelectric sensor of signal acquisition module 5, photoelectric sensor is converted to voltage signal by light signal, and semaphore is sent to controller, controller is according to the integrated AD converter in inside, voltage signal is converted into digital signal, and the processing of process controller internal processes, the value of melamine is presented on outside liquid crystal.Memory module 6 is called to need to be for storing the data of this process; RS232 interface in communication module 3 and jtag interface for and outer computer between transmit data.
As shown in Figure 2, in the present invention, choose wavelength coverage fixing surpass highlighted LED, and adopt straight cutting be encapsulation, the basic procedure of light source: the solution in light source direct irradiation cuvette, light source is by after cuvette solution, part light source is absorbed, and some light source direct irradiation is on photoelectric sensor, and photoelectric sensor sends to controller by the information of this part light source.Thereby controller is by calculating the amount calculating concentration of the light wave of absorption.
As shown in Figure 3, described controller module comprises processor U1A STM32F103VBH6, the first crystal oscillator X1, the second crystal oscillator X2, the second resistance R 2, the 3rd resistance R 3, the first single-pole double-throw switch (SPDT) SW1, the second single-pole double-throw switch (SPDT) SW2, the first filter capacitor C1, the second filter capacitor C2, the 6th filter capacitor C6, the tenth filter capacitor C10, the 11 filter capacitor C11, the 12 filter capacitor C12, the 13 filter capacitor C13, the 14 filter capacitor C14, the 15 filter capacitor C15.8 pins of processor U1A STM32F103VBH6, one end of the first crystal oscillator X1 are connected with one end of the first filter capacitor C1; 9 pins of processor U1A STM32F103VBH6, the other end of the first crystal oscillator X1 are connected with one end of the second filter capacitor C2; The other end ground connection of the first filter capacitor C1; The other end ground connection of the second filter capacitor C2; 12 pins of processor U1A STM32F103VBH6, one end of the second crystal oscillator X2 are connected with one end of the 6th filter capacitor C6; 13 pins of processor U1A STM32F103VBH6, the other end of the second crystal oscillator X2 are connected with one end of the tenth filter capacitor C10; The other end ground connection of the 6th filter capacitor C6; The other end ground connection of the tenth filter capacitor C10; 37 pins of processor U1A STM32F103VBH6 are connected with one end of the second resistance R 2; The other end of the second resistance R 2 is connected with 2 pins of the first single-pole double-throw switch (SPDT) SW1; The 3 pin ground connection of the first single-pole double-throw switch (SPDT) SW1; 1 pin of the first single-pole double-throw switch (SPDT) SW1 is connected with VDD3.3; 94 pins of processor U1A STM32F103VBH6 are connected with one end of the 3rd resistance R 3; The other end of the 3rd resistance R 3 is connected with 2 pins of the second single-pole double-throw switch (SPDT) SW2; The 3 pin ground connection of the second single-pole double-throw switch (SPDT) SW2; 1 pin of the second single-pole double-throw switch (SPDT) SW2 is connected with VDD3.3; One end of the 11 filter capacitor C11, the 12 one end of filter capacitor C12, one end of the 13 filter capacitor C13, the 14 one end of filter capacitor C14, one end of the 15 filter capacitor C15 are connected with VDD3.3; The 11 other end of filter capacitor C11, the other end of the 12 filter capacitor C12, the 13 other end of filter capacitor C13, the other end of the 14 filter capacitor C14, the 15 filter capacitor C15 other end be connected and ground connection.
As shown in Figure 4, described 5V voltage conversion circuit comprises 12V lithium battery, power management chip U2 LM2596S, the 3rd polar capacitor C3, quadripolarity capacitor C 4, the first inductance L 1, the first voltage stabilizing diode D1.1 pin of power management chip U2 LM2596S, the anode of the 3rd polar capacitor C3 are connected with VDD12; The negative electrode of 3 pins of power management chip U2 LM2596S, 5 pins, the 3rd polar capacitor C3, the first anode of voltage stabilizing diode D1, the negative electrode of quadripolarity capacitor C 4 are connected and ground connection; 2 pins of power management chip U2 LM2596S, the negative electrode of the first voltage stabilizing diode D1 are connected with one end of the first inductance L 1; 4 pins of power management chip U2 LM2596S, first other end of inductance L 1, the anode of quadripolarity capacitor C 4 are connected with VDD5.0.
As shown in Figure 5, described 3.3V voltage conversion circuit comprises U4 LD1086D2M33, the 7th polar capacitor C7, ends of the earth property capacitor C 8, the 9th filter capacitor C9.U4 LD1086D2M33DE 1 pin, the 7th negative electrode of polar capacitor C7, the negative electrode of ends of the earth property capacitor C 8 are connected with one end of the 9th filter capacitor C9 and ground connection; U4 LD1086D2M33DE 2 pins, the anode of ends of the earth property capacitor C 8, the other end of the 9th filter capacitor C9 are connected with VDD3.3; The anode of U4 LD1086D2M33DE 3 pins, the 7th polar capacitor C7 is connected with VDD5.0.
Communication module comprises Jtag interface circuit and RS232 level shifting circuit.
As shown in Figure 6, described Jtag interface circuit comprises Jtag interface CON1, the 13 resistance R the 13, the 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 17 resistance R 17.The 13 one end of resistance R 13, one end of the 14 resistance R 14, the 15 one end of resistance R 15,1 pin of one end of the 16 resistance R 16, Jtag interface CON1,2 pins be connected with VDD3.3; The 16 other end of resistance R 16,3 pins of one end of the 17 resistance R 17, Jtag interface CON1 be connected with the PB4 pin of processor U1A STM32F103VBH6; 4 pins of Jtag interface CON1 are connected with the other end of the 17 resistance R 17; 5 pins of the other end of the 15 resistance R 15, Jtag interface CON1 are connected with the PA15 pin of processor U1A STM32F103VBH6; 7 pins of the other end of the 14 resistance R 14, Jtag interface CON1 are connected with the PA13 pin of processor U1A STM32F103VBH6; 9 pins of the other end of the 13 resistance R 13, Jtag interface CON1 are connected with the PA14 pin of processor U1A STM32F103VBH6; 6 pins of Jtag interface CON1 are connected with the PB3 pin of processor U1A STM32F103VBH6; 8 pins of Jtag interface CON1,10 pins are connected and ground connection.
As shown in Figure 7, described RS232 level shifting circuit comprises level transferring chip U6 MAX3232, the 19 filter capacitor C19, the 20 filter capacitor C20, the 21 filter capacitor C21, the 22 filter capacitor C22 and serial ports COM1.7 pins of level transferring chip U6 MAX3232,8 pins, 9 pins, 10 pins are maked somebody a mere figurehead; 16 pins of level transferring chip U6 MAX3232 are connected with VDD3.3; 1 pin of level transferring chip U6 MAX3232 is connected with one end of the 19 filter capacitor C19; 3 pins of level transferring chip U6 MAX3232 are connected with the other end of the 19 filter capacitor C19; 4 pins of level transferring chip U6 MAX3232 are connected with one end of the 22 filter capacitor C22; 5 pins of level transferring chip U6 MAX3232 are connected with the other end of the 22 filter capacitor C22; 2 pins of level transferring chip U6 MAX3232 are connected with one end of the 21 filter capacitor C21; 6 pins of level transferring chip U6 MAX3232 are connected with one end of the 20 filter capacitor C20; 15 pins of level transferring chip U6 MAX3232, the 21 other end of filter capacitor C21, the other end of the 20 filter capacitor C20 are connected and ground connection; 11 pins of level transferring chip U6 MAX3232 are connected with the PA2 pin of processor U1A STM32F103VBH6; 12 pins of level transferring chip U6 MAX3232 are connected with the PA3 pin of processor U1A STM32F103VBH6; 14 pins of level transferring chip U6 MAX3232 are connected with 2 pins of COM1; 13 pins of level transferring chip U6 MAX3232 are connected with 3 pins of COM1; The 5 pin ground connection of COM1; All the other pins of COM1 are built on stilts.
As shown in Figure 8, described light source module comprises the first resistance R 1, triode Q1, LED lamp DS1.One end of the first resistance R 1 is connected with VDD3.3; The other end of the first resistance R 1 is connected with 1 pin of triode Q1; The PA8 pin of processor U1A STM32F103VBH6 is connected with 2 pins of triode Q1; 1 pin of LED lamp DS1 is connected with 3 pins of triode Q1; The 2 pin ground connection of LED lamp DS1.
As shown in Figure 9, described signal acquisition module comprises photoelectric sensor U3 OTP101, the 8th filter capacitor C8.1 pin of photoelectric sensor U3 OTP101, one end of the 8th filter capacitor C8 are connected with VDD3.3; The other end of the 8th filter capacitor C8 is connected with 3 pins of photoelectric sensor U3 OTP101 and ground connection; 4 pins of photoelectric sensor U3 OTP101,5 pins are connected with the PA0 pin of processor U1A STM32F103VBH6; The 8 pin ground connection of photoelectric sensor U3 OTP101; 2 pins of photoelectric sensor U3 OTP101,6 pins are maked somebody a mere figurehead.
As shown in figure 10, described memory module comprises storage chip U5 AT45DB161D, the 4th resistance R 4, the 5th resistance R the 5, the 16 filter capacitor C16.1 pin of storage chip U5 AT45DB161D is connected with the PA7 pin of processor U1A STM32F103VBH6; 2 pins of storage chip U5 AT45DB161D are connected with the PA5 pin of processor U1A STM32F103VBH6; 4 pins of storage chip U5 AT45DB161D are connected with the PA4 pin of processor U1A STM32F103VBH6; 8 pins of storage chip U5 AT45DB161D are connected with the PA6 pin of processor U1A STM32F103VBH6; The 7 pin ground connection of storage chip U5 AT45DB161D; 6 pins of storage chip U5 AT45DB161D, one end of the 4th resistance R 4, the 5th one end of resistance R 5, one end of the 16 filter capacitor C16 are connected with VDD3.3; 3 pins of storage chip U5 AT45DB161D are connected with the other end of the 4th resistance R 4; 5 pins of storage chip U5 AT45DB161D, the other end of the 5th resistance R 5 are connected with the PA1 pin of processor U1A STM32F103VBH6; The other end ground connection of the 16 filter capacitor C16.
As shown in figure 11, described input/output module comprises the first switch S 1, second switch S2, the 3rd switch S 3, the 4th switch S 4, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R the 11, the 17 filter capacitor C17, the 18 filter capacitor C18 and liquid crystal display socket JP1.One end of one end of one end of the first switch S 1, the 3rd switch S 3, the tenth resistance R 10 is connected with the PD12 pin of processor U1A STM32F103VBH6; One end of second switch S2, the 4th one end of switch S 4, one end of the 11 resistance R 11 are connected with the PD11 pin of processor U1A STM32F103VBH6; One end of the other end of the other end of the first switch S 1, second switch S2, the 7th resistance R 7 is connected with the PD13 pin of processor U1A STM32F103VBH6; One end of the other end of the other end of the 3rd switch S 3, the 4th switch S 4, the 8th resistance R 8 is connected with the PD14 pin of processor U1A STM32F103VBH6; The other end of the tenth resistance R 10, the 11 other end of resistance R 11 and one end of the 18 filter capacitor C18 are connected and ground connection; The other end of the 7th resistance R 7, the 8th other end of resistance R 8, the other end of the 18 filter capacitor C18 are connected with VDD3.3.The 1 pin ground connection of liquid crystal socket JP1; 2 pins of liquid crystal socket JP1, the 6th one end of resistance R 6, one end of the 17 filter capacitor C17 are connected with VDD5.0; 3 pins of liquid crystal socket JP1, the other end of the 6th resistance R 6 are connected with one end of the 9th resistance R 9; 4 pins of liquid crystal socket JP1 are connected with the PD10 pin of processor U1A STM32F103VBH6; 5 pins of liquid crystal socket JP1 are connected with the PD9 pin of processor U1A STM32F103VBH6; 6 pins of liquid crystal socket JP1 are connected with the PD8 pin of processor U1A STM32F103VBH6; 7 pins of liquid crystal socket JP1 are connected with the PD7 pin of processor U1A STM32F103VBH6; 8 pins of liquid crystal socket JP1 are connected with the PD6 pin of processor U1A STM32F103VBH6; 9 pins of liquid crystal socket JP1 are connected with the PD5 pin of processor U1A STM32F103VBH6; 10 pins of liquid crystal socket JP1 are connected with the PD4 pin of processor U1A STM32F103VBH6; 11 pins of liquid crystal socket JP1 are connected with the PD3 pin of processor U1A STM32F103VBH6; 12 pins of liquid crystal socket JP1 are connected with the PD2 pin of processor U1A STM32F103VBH6; 13 pins of liquid crystal socket JP1 are connected with the PD1 pin of processor U1A STM32F103VBH6; 14 pins of liquid crystal socket JP1 are connected with the PD0 pin of processor U1A STM32F103VBH6; 15 pins of liquid crystal socket JP1, the 9th other end of resistance R 9 and the other end of the 17 filter capacitor C17 are connected and ground connection; 16 pins and the VDD5.0 of liquid crystal socket JP1.
The work engineering of portable melamine detector is as follows: light source module adopts specific ultra-bright LED lamp, and its wavelength coverage is less, can be absorbed by melamine.Controller module is lighted this LED according to the input of matrix keyboard, the light wave that LED lamp sends is by being placed with the cuvette of melamine solution, part light wave is absorbed, remaining light sources is irradiated on the photoelectric sensor of signal acquisition module, photoelectric sensor is converted to voltage signal by light signal, and semaphore is sent to controller, controller is according to the integrated AD converter in inside, voltage signal is converted into digital signal, and the processing of process controller internal processes, the concentration value of melamine is presented in outside LCD screen.
Claims (1)
1. portable melamine detector, is characterized in that: this detector comprises controller module, power management module, communication module, memory module, signal acquisition module, light source module and input/output module; Power module comprises 5V voltage conversion circuit and 3.3V voltage conversion circuit; Communication module comprises jtag interface and RS232 serial interface switching circuit; Input/output module comprises liquid crystal interface circuit and matrix keyboard; 5V power-switching circuit provides power supply for liquid crystal interface; 3.3V power-switching circuit provides power supply for all the other modules; Light source module adopts ultra-bright LED lamp, and its wavelength coverage is less, can be absorbed by melamine;
Controller module is lighted this LED according to the input of matrix keyboard, the light wave that LED lamp sends is by being placed with the cuvette of melamine, part light wave is absorbed, remaining light sources is irradiated on the photoelectric sensor of signal acquisition module, photoelectric sensor is converted to voltage signal by light signal, and semaphore is sent to controller, controller is according to the integrated AD converter in inside, voltage signal is converted into digital signal, and the processing of process controller internal processes, the concentration value of melamine is presented in outside LCD screen;
When being used for storing the data of this process to needing, memory module calls; RS232 interface in communication module and jtag interface for and outer computer between transmit data;
Described controller module comprises processor U1A STM32F103VBH6, the first crystal oscillator X1, the second crystal oscillator X2, the second resistance R 2, the 3rd resistance R 3, the first single-pole double-throw switch (SPDT) SW1, the second single-pole double-throw switch (SPDT) SW2, the first filter capacitor C1, the second filter capacitor C2, the 6th filter capacitor C6, the tenth filter capacitor C10, the 11 filter capacitor C11, the 12 filter capacitor C12, the 13 filter capacitor C13, the 14 filter capacitor C14, the 15 filter capacitor C15; 8 pins of processor U1A STM32F103VBH6, one end of the first crystal oscillator X1 are connected with one end of the first filter capacitor C1; 9 pins of processor U1A STM32F103VBH6, the other end of the first crystal oscillator X1 are connected with one end of the second filter capacitor C2; The other end ground connection of the first filter capacitor C1; The other end ground connection of the second filter capacitor C2; 12 pins of processor U1A STM32F103VBH6, one end of the second crystal oscillator X2 are connected with one end of the 6th filter capacitor C6; 13 pins of processor U1A STM32F103VBH6, the other end of the second crystal oscillator X2 are connected with one end of the tenth filter capacitor C10; The other end ground connection of the 6th filter capacitor C6; The other end ground connection of the tenth filter capacitor C10; 37 pins of processor U1A STM32F103VBH6 are connected with one end of the second resistance R 2; The other end of the second resistance R 2 is connected with 2 pins of the first single-pole double-throw switch (SPDT) SW1; The 3 pin ground connection of the first single-pole double-throw switch (SPDT) SW1; 1 pin of the first single-pole double-throw switch (SPDT) SW1 is connected with VDD3.3; 94 pins of processor U1A STM32F103VBH6 are connected with one end of the 3rd resistance R 3; The other end of the 3rd resistance R 3 is connected with 2 pins of the second single-pole double-throw switch (SPDT) SW2; The 3 pin ground connection of the second single-pole double-throw switch (SPDT) SW2; 1 pin of the second single-pole double-throw switch (SPDT) SW2 is connected with VDD3.3; One end of the 11 filter capacitor C11, the 12 one end of filter capacitor C12, one end of the 13 filter capacitor C13, the 14 one end of filter capacitor C14, one end of the 15 filter capacitor C15 are connected with VDD3.3; The 11 other end of filter capacitor C11, the other end of the 12 filter capacitor C12, the 13 other end of filter capacitor C13, the other end of the 14 filter capacitor C14, the 15 filter capacitor C15 other end be connected and ground connection;
Described 5V voltage conversion circuit comprises 12V lithium battery, power management chip U2 LM2596S, the 3rd polar capacitor C3, quadripolarity capacitor C 4, the first inductance L 1, the first voltage stabilizing diode D1; 1 pin of power management chip U2 LM2596S, the anode of the 3rd polar capacitor C3 are connected with VDD12; The negative electrode of 3 pins of power management chip U2 LM2596S, 5 pins, the 3rd polar capacitor C3, the first anode of voltage stabilizing diode D1, the negative electrode of quadripolarity capacitor C 4 are connected and ground connection; 2 pins of power management chip U2 LM2596S, the negative electrode of the first voltage stabilizing diode D1 are connected with one end of the first inductance L 1; 4 pins of power management chip U2 LM2596S, first other end of inductance L 1, the anode of quadripolarity capacitor C 4 are connected with VDD5.0;
Described 3.3V voltage conversion circuit comprises U4 LD1086D2M33, the 7th polar capacitor C7, ends of the earth property capacitor C 8, the 9th filter capacitor C9; U4 LD1086D2M33DE 1 pin, the 7th negative electrode of polar capacitor C7, the negative electrode of ends of the earth property capacitor C 8 are connected with one end of the 9th filter capacitor C9 and ground connection; U4 LD1086D2M33DE 2 pins, the anode of ends of the earth property capacitor C 8, the other end of the 9th filter capacitor C9 are connected with VDD3.3; The anode of U4 LD1086D2M33DE 3 pins, the 7th polar capacitor C7 is connected with VDD5.0;
Communication module comprises Jtag interface circuit and RS232 level shifting circuit;
Described Jtag interface circuit comprises Jtag interface CON1, the 13 resistance R the 13, the 14 resistance R the 14, the 15 resistance R the 15, the 16 resistance R the 16, the 17 resistance R 17; The 13 one end of resistance R 13, one end of the 14 resistance R 14, the 15 one end of resistance R 15,1 pin of one end of the 16 resistance R 16, Jtag interface CON1,2 pins be connected with VDD3.3; The 16 other end of resistance R 16,3 pins of one end of the 17 resistance R 17, Jtag interface CON1 be connected with the PB4 pin of processor U1A STM32F103VBH6; 4 pins of Jtag interface CON1 are connected with the other end of the 17 resistance R 17; 5 pins of the other end of the 15 resistance R 15, Jtag interface CON1 are connected with the PA15 pin of processor U1A STM32F103VBH6; 7 pins of the other end of the 14 resistance R 14, Jtag interface CON1 are connected with the PA13 pin of processor U1A STM32F103VBH6; 9 pins of the other end of the 13 resistance R 13, Jtag interface CON1 are connected with the PA14 pin of processor U1A STM32F103VBH6; 6 pins of Jtag interface CON1 are connected with the PB3 pin of processor U1A STM32F103VBH6; 8 pins of Jtag interface CON1,10 pins are connected and ground connection;
Described RS232 level shifting circuit comprises level transferring chip U6 MAX3232, the 19 filter capacitor C19, the 20 filter capacitor C20, the 21 filter capacitor C21, the 22 filter capacitor C22 and serial ports COM1; 7 pins of level transferring chip U6 MAX3232,8 pins, 9 pins, 10 pins are maked somebody a mere figurehead; 16 pins of level transferring chip U6 MAX3232 are connected with VDD3.3; 1 pin of level transferring chip U6 MAX3232 is connected with one end of the 19 filter capacitor C19; 3 pins of level transferring chip U6 MAX3232 are connected with the other end of the 19 filter capacitor C19; 4 pins of level transferring chip U6 MAX3232 are connected with one end of the 22 filter capacitor C22; 5 pins of level transferring chip U6 MAX3232 are connected with the other end of the 22 filter capacitor C22; 2 pins of level transferring chip U6 MAX3232 are connected with one end of the 21 filter capacitor C21; 6 pins of level transferring chip U6 MAX3232 are connected with one end of the 20 filter capacitor C20; 15 pins of level transferring chip U6 MAX3232, the 21 other end of filter capacitor C21, the other end of the 20 filter capacitor C20 are connected and ground connection; 11 pins of level transferring chip U6 MAX3232 are connected with the PA2 pin of processor U1A STM32F103VBH6; 12 pins of level transferring chip U6 MAX3232 are connected with the PA3 pin of processor U1A STM32F103VBH6; 14 pins of level transferring chip U6 MAX3232 are connected with 2 pins of COM1; 13 pins of level transferring chip U6 MAX3232 are connected with 3 pins of COM1; The 5 pin ground connection of COM1; All the other pins of COM1 are built on stilts;
Described light source module comprises the first resistance R 1, triode Q1, LED lamp DS1; One end of the first resistance R 1 is connected with VDD3.3; The other end of the first resistance R 1 is connected with 1 pin of triode Q1; The PA8 pin of processor U1A STM32F103VBH6 is connected with 2 pins of triode Q1; 1 pin of LED lamp DS1 is connected with 3 pins of triode Q1; The 2 pin ground connection of LED lamp DS1;
Described signal acquisition module comprises photoelectric sensor U3 OTP101, the 8th filter capacitor C8; 1 pin of photoelectric sensor U3 OTP101, one end of the 8th filter capacitor C8 are connected with VDD3.3; The other end of the 8th filter capacitor C8 is connected with 3 pins of photoelectric sensor U3 OTP101 and ground connection; 4 pins of photoelectric sensor U3 OTP101,5 pins are connected with the PA0 pin of processor U1A STM32F103VBH6; The 8 pin ground connection of photoelectric sensor U3 OTP101; 2 pins of photoelectric sensor U3 OTP101,6 pins are maked somebody a mere figurehead;
Described memory module comprises storage chip U5 AT45DB161D, the 4th resistance R 4, the 5th resistance R the 5, the 16 filter capacitor C16; 1 pin of storage chip U5 AT45DB161D is connected with the PA7 pin of processor U1A STM32F103VBH6; 2 pins of storage chip U5 AT45DB161D are connected with the PA5 pin of processor U1A STM32F103VBH6; 4 pins of storage chip U5 AT45DB161D are connected with the PA4 pin of processor U1A STM32F103VBH6; 8 pins of storage chip U5 AT45DB161D are connected with the PA6 pin of processor U1A STM32F103VBH6; The 7 pin ground connection of storage chip U5 AT45DB161D; 6 pins of storage chip U5 AT45DB161D, one end of the 4th resistance R 4, the 5th one end of resistance R 5, one end of the 16 filter capacitor C16 are connected with VDD3.3; 3 pins of storage chip U5 AT45DB161D are connected with the other end of the 4th resistance R 4; 5 pins of storage chip U5 AT45DB161D, the other end of the 5th resistance R 5 are connected with the PA1 pin of processor U1A STM32F103VBH6; The other end ground connection of the 16 filter capacitor C16;
Described input/output module comprises the first switch S 1, second switch S2, the 3rd switch S 3, the 4th switch S 4, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R the 11, the 17 filter capacitor C17, the 18 filter capacitor C18 and liquid crystal display socket JP1; One end of one end of one end of the first switch S 1, the 3rd switch S 3, the tenth resistance R 10 is connected with the PD12 pin of processor U1A STM32F103VBH6; One end of second switch S2, the 4th one end of switch S 4, one end of the 11 resistance R 11 are connected with the PD11 pin of processor U1A STM32F103VBH6; One end of the other end of the other end of the first switch S 1, second switch S2, the 7th resistance R 7 is connected with the PD13 pin of processor U1A STM32F103VBH6; One end of the other end of the other end of the 3rd switch S 3, the 4th switch S 4, the 8th resistance R 8 is connected with the PD14 pin of processor U1A STM32F103VBH6; The other end of the tenth resistance R 10, the 11 other end of resistance R 11 and one end of the 18 filter capacitor C18 are connected and ground connection; The other end of the 7th resistance R 7, the 8th other end of resistance R 8, the other end of the 18 filter capacitor C18 are connected with VDD3.3;
The 1 pin ground connection of liquid crystal socket JP1; 2 pins of liquid crystal socket JP1, the 6th one end of resistance R 6, one end of the 17 filter capacitor C17 are connected with VDD5.0; 3 pins of liquid crystal socket JP1, the other end of the 6th resistance R 6 are connected with one end of the 9th resistance R 9; 4 pins of liquid crystal socket JP1 are connected with the PD10 pin of processor U1A STM32F103VBH6; 5 pins of liquid crystal socket JP1 are connected with the PD9 pin of processor U1A STM32F103VBH6; 6 pins of liquid crystal socket JP1 are connected with the PD8 pin of processor U1A STM32F103VBH6; 7 pins of liquid crystal socket JP1 are connected with the PD7 pin of processor U1A STM32F103VBH6; 8 pins of liquid crystal socket JP1 are connected with the PD6 pin of processor U1A STM32F103VBH6; 9 pins of liquid crystal socket JP1 are connected with the PD5 pin of processor U1A STM32F103VBH6; 10 pins of liquid crystal socket JP1 are connected with the PD4 pin of processor U1A STM32F103VBH6; 11 pins of liquid crystal socket JP1 are connected with the PD3 pin of processor U1A STM32F103VBH6; 12 pins of liquid crystal socket JP1 are connected with the PD2 pin of processor U1A STM32F103VBH6; 13 pins of liquid crystal socket JP1 are connected with the PD1 pin of processor U1A STM32F103VBH6; 14 pins of liquid crystal socket JP1 are connected with the PD0 pin of processor U1A STM32F103VBH6; 15 pins of liquid crystal socket JP1, the 9th other end of resistance R 9 and the other end of the 17 filter capacitor C17 are connected and ground connection; 16 pins and the VDD5.0 of liquid crystal socket JP1.
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Application publication date: 20140305 |