CN2451041Y - Medical infrared thermal imaging system intelligent A/D collecting card - Google Patents

Abstract

The utility model relates to a medical infrared thermal imaging instrument intelligent A/D collecting card. The A/D collecting card comprises three-state buffers U5 and U6, an A/D converter U7, operational amplifiers U8 and U9, schmitt triggers U4A, U4B and U4C, a nine core interface JP1 and a collecting card plug JP4. The utility model is characterized in that the utility model is provided with a microcontroller U1, an 8D latch unit U2, an 8D encoder U3, an 8-bit magnitude comparator U10, an 8K double-port random memory U11 and a read only memory U12 which can erase programs. Address lines, data lines and control line contact feet of the microcontroller U1, the 8D latch unit U2, the 8D encoder U3, the 8-bit magnitude comparator U10, the 8K double-port random memory U11 and the read only memory U12 which can erase the programs are connected with the address line, the data line and the control line of a bus, and are connected with an 8-bit dial switch JP3, a resistor chain RP1 and a jumper wire device JP2 in parallel.

Description

Medical infrared thermal imaging system intelligence A/D capture card

This utility model relates to a kind of thermal imaging system A/D capture card, particularly medical infrared thermal imaging system intelligence A/D capture card.

Medical infrared thermal imaging system A/D capture card is in medical image technology and the imaging technique, and is indispensable for satisfying thermal map image clinical diagnosis technology.For adapting to the processing of computer,, all to adopt the A/D capture card to the collection and the A/D conversion of data.But typical A/D mould one number conversion circuit engineering that the right and wrong that common A/D capture card all adopts are intelligent, therefore cause A/D capture card and main frame speed when data conversion slow, select the mainboard structure system, tracking synchronously can not automatization, has influenced quick high-quality thermal map collection.

The purpose of this utility model is a kind of quick, high-quality human body thermal radiation pattern data signal that obtains of design, and mainboard structure is not had the selection requirement, the medical infrared thermal imaging system intelligence A/D capture card of energy automatic synchronous tracking.

The purpose of this utility model is to realize like this, medical infrared thermal imaging system intelligence A/D capture card, include three state buffer, A/D converter, operational amplifier, Schmidt trigger, 9 core interfaces that are connected with photographic head and the capture card plug that is connected with main frame, be characterized in being provided with microcontroller, the 8D latch, the 8D decoder, 8 bit value comparators, 8K twoport random memory and erasable programmable read-only memory, their address wire, data wire, the address wire of control line pin and bus, data wire, control line connects, the outfan 2-9 foot of three state buffer is connected with bus, the input 17 of microcontroller, 6 of 18 feet and 9 core interfaces, 7 feet connect, and be connected with outside photographic head through Schmidt trigger, 3 of 8 bit value comparators, 4,6,9,12,14,16, be parallel with 8 DIP devices and resistor chain on 18 feet, the data wire pin of another mouthful of 8K dual-port storage is connected with the capture card plug, be connected with external main frame data/address bus through capture card, also be connected to a jumper wire device on the capture card plug.

By the medical infrared thermal imaging system intelligence A/D capture card that this utility model provides, signals collecting is rapid, and the acquisition quality height all can move with any mainboard structure, has realized automatic synchronous tracking.A/D sampled signal amplitude 0-10V, resolution 2.4mV/LSB, 12 of word lengths, speed 〉=100KSPS.

Accompanying drawing of the present utility model is the circuit theory diagrams of medical infrared thermal imaging system intelligence A/D capture card.

Further specify embodiment of the present utility model with reference to the accompanying drawings, medical infrared thermal imaging system intelligence A/D capture card as shown in drawings, include three state buffer U5, U6, A/D converter U7, operational amplifier U8, U9, Schmidt trigger U4A, U4B, U4C, 9 core interface JP1 that are connected with photographic head and the capture card plug JP4 that is connected with main frame, it is characterized in that being provided with microcontroller U1,8D latch U2,8D decoder U3,8 bit value comparator U10,8K twoport random memory U11 and erasable programmable read-only memory U12, their address wire, data wire, the address wire of control line pin and bus, data wire, control line connects, three state buffer U5, the outfan 2-9 foot of U6 is connected with bus, the input 17 of microcontroller U1,6 of 18 feet and 9 core interface JP1,7 feet connect, and through Schmidt trigger U4A, U4B, U4C is connected with outside photographic head, 3 of 8 bit value comparator U10,4,6,9,12,14,16, be parallel with 8 DIP device JP3 and resistor chain RP1 on 18 feet, the data wire pin of another mouthful of 8K dual-port storage U11 is connected with capture card plug JP4, be connected with external main frame data/address bus through capture card JP4, also be connected to a jumper wire device JP2 on the capture card plug JP4.

Photographic head picked-up and the image analoging signal A through putting in advance, Schmidt trigger U4A through 9 core interface JP1, U4B, anti-phase 5 feet from JP1 of U4C are given the resistance R 1 on input 2 feet of the integrator that operational amplifier U8 forms, after amplifying, send into the comparator that operational amplifier U9 forms, deliver to 27 feet of A/D converter U7 from outfan 6 feet of U9, convert 12 bit digital formula image D to through U7, deliver to three state buffer U5 respectively from the 1-12 foot of U7, the 11-18 foot of U6, through U5, the outfan 2-9 foot of U6 is delivered to bus (more because of relating to lines, so the bus of not drawing in the accompanying drawing).

The 45-60 foot of microcontroller U1 reads the data signal of being sent from three state buffer U5, U6 by 8K dual-port storage U11 by bus, obtain oscillating impulse by 66,67 feet of U1 from X1, the X2 end of crystal oscillator JZ simultaneously, get in touch the control signal of three state buffer U5, U6 by 5,6,7 feet of U1 from the 1-3 foot of decoder U3; And 17,18 feet of U1 obtain frame, the line scanning synchronizing signal of photographic head from 6,7 feet of 9 core interface JP1, adapt to field in the shooting process, and the row synchrodata is controlled.By microcontroller synchronizing signal is responded, finish A/D conversion sampling delay.Automatically compensate its synchronous offset error, operations such as decoding, photographic head control are transferred, instructed to data, in conjunction with software control shooting, A/D change, store, cushion, latch, decoding, exchanges data and keep high level, low level, forbid latching three-state.Microcontroller U1 is that the computer keyboard order is passed to erasable programmable read-only memory U12 by U1 commander realization intellectuality by bus to the control of shooting motor, focusing motor.

8K twoport random memory U11 25-32 foot flatly reads data from bus, the data wire pin 16-23 of another mouthful connects the main frame bus by capture card plug JP4 and carries out the data image signal exchange, finish and gather analog digital conversion transmission, with host exchanging data, comprise control instruction, the feedback states letter is suffered from A/D transformation result, sampling delay time etc.Utilizing jumper wire device JP2 can enter main frame selects interrupt number to carry out the interrupt requests initiating task.When address conflict occurring, connect latch U2, and connect 8 DIP device JP3 and resistor chain RP1, carry out dial-up and select different address spaces, suitable operation during acquisition by 8 bit value comparator U10.

Claims (1)

1. medical infrared thermal imaging system intelligence A/D capture card, include three state buffer (U5), (U6), A/D converter (U7), operational amplifier (U8), (U9), Schmidt trigger (U4A), (U4B), (U4C), 9 core interfaces (JP1) that are connected with photographic head and the capture card plug (JP4) that is connected with main frame, it is characterized in that being provided with microcontroller (U1), 8D latch (U2), 8D decoder (U3), 8 bit value comparators (U10), 8K twoport random memory (U11) and erasable programmable read-only memory (U12), their address wire, data wire, the address wire of control line pin and bus, data wire, control line connects, three state buffer (U5), (U6) outfan 2-9 foot is connected with bus, the input 17 of microcontroller (U1), 6 of 18 feet and 9 core interfaces (JP1), 7 feet connect, and through Schmidt trigger (U4A), (U4B), (U4C) be connected with outside photographic head, 3 of 8 bit value comparators (U10), 4,6,9,12,14,16, be parallel with 8 DIP devices (JP3) and resistor chain (RP1) on 18 feet, the data wire pin of another mouthful of 8K dual-port storage (U11) is connected with capture card plug (JP4), be connected with external main frame data/address bus through capture card (JP4), also be connected to a jumper wire device (JP2) on the capture card plug (JP4).