CN2741507Y - Radio electronic endoscope photographic device - Google Patents

Abstract

The utility model relates to a radio electronic endoscope photographic device, and is characterized in that the device consists of a charge-coupled device (CCD), an image processing control module, a high energy battery and a radio transmitting module. The frequency of the outcoming signal of the radio transmitting and receiving module is 1. 2-2. 7 GHz. Operators can feel quite convenient by adopting the radio transmission and reception mode. The utility model is not easy to be subjected to the interference of an extraneous signal while in use. The television monitor can move randomly within the distance of 50 meters, and can still receive the signal of the endoscope image pickup device, thus convenient for operators to observe.

Description

The wireless electronic endoscope camera head

Technical field

This utility model relates to the medical electronic endoscope camera head.

Background technology

The first generation product of video image dendoscope from nineteen eighty-three be applied to clinical since, produced third generation video image dendoscope up till now and be applied to clinical.Produce the more famous company of video image dendoscope in the world by the Ya Lun (WelchAllyn) of the U.S. and the Olympus (Olympas) of Japan etc.Because the appearance of video image dendoscope has started historical new page for the diagnosis and the treatment of scope for over 100 years more than a hundred years, believe that video image dendoscope will give play to its enormous function in clinical, teaching and scientific research.

Basic structure: the formation of video image dendoscope is except scope, endoscope image pick-up device center and three major parts of TV monitor, also be equipped with some auxiliary device, as videocorder, photographing unit, suction pump and be used for importing used various treatment apparatus of the keyboard of various information and diagnoses and treatment etc.

The endoscope image pick-up device of being sold all is that ray mode is arranged in the market, and promptly by the signal cable transmission, this transmission mode has following shortcoming to the signal of endoscope image pick-up device to TV monitor:

(1) because the cause of cable is arranged, the operator can think that operation is inconvenient;

(2) planting transmission means is analog signal transmission, thus very easily be subjected to the interference of extraneous signal, as high frequency electric knife etc.;

(3) lack service life, cable very easily fractures.

Summary of the invention

The purpose of this utility model is: a kind of wireless electronic endoscope camera head that adopts wireless transmission method is provided.

The technical solution that realizes above-mentioned purpose is such:

1, wireless electronic endoscope camera head, comprise scope, endoscopic camera structure and TV monitor, it is characterized in that: described endoscopic camera structure is the wireless electronic endoscope image mechanism, comprises charge-coupled device, Flame Image Process control module, high-energy battery and wireless transmitter module; The input of charge-coupled device is connecting the outfan of optics adapter, and its outfan is connecting the Flame Image Process control module; The outfan of Flame Image Process control module is connecting the input that output signal frequency is the wireless transmitter module of 1.2-2.7GHz, and its other end is connecting high-energy battery; The other end of wireless transmitter module is also connecting high-energy battery; Described TV monitor is connecting the wireless receiver that receive frequency is 1.2-2.7GHz.

Wireless electronic endoscope camera head of the present utility model, because the signal of endoscope image pick-up device transmits by signal wireless to TV monitor, this transmission mode has following advantage:

(1) this device is owing to adopt wireless transmit, receive mode, and it is very convenient that the operator can feel;

(2) this transmission means is a transmission of wireless signals, so be not vulnerable to the interference of extraneous signal;

(3) TV monitor can move the signal that all can receive endoscope image pick-up device arbitrarily in 50 meters, has made things convenient for operator's observation.

Description of drawings

Fig. 1 is this utility model structure principle chart,

Fig. 2 is electric coupler and graphics processing unit schematic diagram,

Fig. 3 is the wireless transmitting unit schematic diagram,

Fig. 4 is the radio receiving unit schematic diagram.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Referring to Fig. 1, this wireless electronic endoscope camera head comprises medical endoscope, optics adapter, DVL wireless electronic endoscope image mechanism, wireless receiver, monitor and picture recording equipment.Wherein the endoscopic camera structure comprises charge-coupled device, Flame Image Process control module, high-energy battery and wireless transmitter module for the wireless electronic endoscope image mechanism; The input of charge-coupled device is connecting the outfan of optics adapter, and its outfan is connecting the Flame Image Process control module; The outfan of Flame Image Process control module is connecting the input that output signal frequency is the wireless transmitter module of 2.4GHz, and its other end is connecting high-energy battery; The other end of wireless transmitter module is also connecting high-energy battery; Described TV monitor is connecting the wireless receiver that receive frequency is 2.4GHz.

The operation principle of this device is such: optical signal passes to video camera through endoscope, organically combine with the CCD (charge-coupled device) of photographic head through optics adapter, optical signal all impinges upon the surface of CCD, CCD is subjected to light to irradiation, thereby the drift that produces current potential produces the signal of telecommunication, and the signal of telecommunication outputs to Flame Image Process/control module to carry out treatment of picture, reduction and output to the wireless transmitter module coding with video signal at last and send; Equipment outputs such as monitor were sent in decoding after the receptor of receiving terminal was received signal.

Wherein ccd image collection and display device comprise: clock, image acquisition, Video processing and A/D, display buffer, interface microcontroller, video output (D/A and video coding) wireless transmitter module, see Fig. 2.

Ccd image is gathered

The CCD device is a kind of multipurpose device, can be used as memorizer, signal processing circuit and image acquisition device etc.As image acquisition device, to compare with pickup tube, the CCD device does not have colored shadow effect, and the image of picked-up does not have the phenomenon of burning, the nothing left picture.It highly sensitive, working stability.Because CCD is placed on the endoscope lens part that enters human body alimentary canal, its size is very restricted, and generally is no more than Φ 4mm, and this has also limited microminiature CCD Color Image Acquisition device Scheme Selection.Because bulky, trichroism CCD scheme at first is excluded.With the CCD of volume, colored CCD is lower than the resolution of monochromatic CCD, and therefore device adopts monochromatic CCD (black-white CCD) scheme of monolithic.It is red, green, the blue signal that utilizes rotation three-color filter timesharing order pickup image, and the control of process display buffer outputs to monitor simultaneously and shows true color image.That device adopts is the TC221 that Texas Instruments releases in the nineties, the array image sensor of this full frame operation is to design for adapting to applied environment medical science and commercial Application abominable or the needs miniaturization specially, its diagonal angle line length is 2.4mm, satisfy the restriction of endoscope lens part to diameter, resolution is 190 * 190.Control key to CCD is it is driven in the control of signal, has only the driving signal of making by the given time sequential routine could correctly obtain the video signal that CCD collects.IAG is that row moves clock, and SRG is the serial shift clock, and ABG is the anti-pulse of blooming.From sequential chart, can find out strict sequential corresponding relation is arranged between IAG and the SRG.

The video display buffer

The video display buffer of device is the core of device.By its reception, storage, transmission,, satisfy device view data is being outputed to the correct many-sided processing requirements done that shows on the monitor simultaneously as the alleviation link of high-speed equipment and low-speed device to view data.Its display buffer is mainly finished following function in device:

. the contradiction of the monitor read-write of high-speed CCD and low speed;

. the true color of monochromatic ccd image is handled;

. the full frame CCD parity field of output signal line by line separates;

. show that by realizing the two pictures of size picture freeze freezes picture and changes frame.

As seen the video display buffer is most critical in the device control, the most complicated part, and the display buffer of device is mainly formed by FIFO, VRAM and by the control circuit that FPGA constitutes.

The frequency of the capable transfering clock of TC221 is 32k, and the line frequency of monitor is 15.625k, and the discordance of this line frequency can cause the mistake that shows, and FIFO can be alleviated this CCD as the field buffer memory and read the contradiction write slowly with monitor soon.By the paging of ingenious control VRAM, subregion and write the address and realize that the true color of monochromatic ccd image handles, the full frame CCD parity field of output signal line by line separate and window control etc.

Dual-ported memory (VRAM) is a kind of graph image storage chip of new development in recent years, this device has adopted the TC528257 of Hitachi, Ltd, it has adopted two memory banks and Double Data mouth (dual-port) structure, can directly under the clock more than the 10MHz, work, the difference of it and common memorizer maximum is that its inside contains two dissimilar memory banks, the dynamic memory body (DRAM) that capacity is 256k * 8bit, another capacity is the high speed serialization memory bank (SAM) of 512 * 8bit, and the FPDP of oneself is all arranged separately.Two memory banks both can work alone respectively, again Data transmission each other.It has solved the contradiction that other memorizer can not read while write, and with other memorizer ratio, required memorizer minimum number, peripheral additional device is minimum, and the color effect of image is best.

TC528257 has very strong function, and several working ways is arranged, the management more complicated.Three kinds of working methods of TC528257 have mainly been used in the device: read to transmit, fast page mode writes, CBR refreshes automatically.Read to be transmitted in line retrace and transmit data line to SAM, once when VRAM writes delegation's signal, go here and there out data line in active line with the fast page mode writing mode and change to D/A from SAM from DRAM.The DRAM memory bank is the same with the common dynamic memory bank to be needed to refresh otherwise signal can be lost, device adopts CBR (CAS puts preceding RAS) to refresh mode automatically and adopts concentrated refreshing in line retrace, make every row finish refreshing to 8 row, total refresh cycle is: 512 row/8*64 μ s=4.096ms, can satisfy the refresh cycle requirement.

Device adopts six TC528257 to constitute three pages of memory banks, is respectively three picture contents of R, G, B of the monochromatic CCD output of sequential storage with the field, and three one by turns, and output simultaneously realizes that real-time true color shows.

The parity field separation is what to realize by the subregion of memory bank.Device adopts the signal of a color of two block storages storage, and memory bank carried out subregion, memory bank 1 deposits the singular point signal of CCD output in, memory bank 2 deposits the pair-point signal of CCD output in, each memory bank is divided into two districts of 0～255 row and 256～511 row by row, only there is difference in two districts on the highest order of address, 0～255 this district of row is used to store the strange capable signal of CCD output, and 256～511 row are used to store the idol row signal of CCD output.What read in the time of strange is the signal in 0～255 this district of row, and what promptly show on a strange monitor is the strange capable signal of CCD output, and in like manner, what read the idol field is the signal of CCD idol row.Separate the ccd image that a width of cloth is exported line by line, complete correct showing on interleaved monitor through such parity field.Strange row also make the speed of reading reduce half with separating of idol row, have reduced the requirement to memory chip speed, make the best usefulness of chip performance.

The control of display buffer window

1) double-image display device shows two pictures of size.The resolution of little picture is 190 * 190, and promptly ccd image is corresponding one by one with the pixel of monitor epigraph.The resolution of big picture is 380 * 380, and it is the pixel that CCD goes here and there out to be write 4 corresponding on monitor positions form 1 o'clock to 4 o'clock mapping, makes view data 2 times of broadenings all in the horizontal and vertical directions.2) picture freeze with change the frame device in by the corresponding memory block of screen picture is constantly write, can reach real-time demonstration, promptly dynamically show; If corresponding memory block is only refreshed and read, realize that then image " freezes ", promptly static the demonstration.Dynamically picture displayed can be converted to static demonstration, and vice versa.The picture that freezes can be caught current a certain moment image, and dynamically picture displayed still shows in real time, and the action of circuit at this moment is called changes frame, promptly the memory block content of freezing the picture correspondence is upgraded with first three field information, reads repeatedly then.Device always has one of four states, notes by abridging to be S1: big picture is moving, little picture still; S2: big picture still, little picture is moving; S3: big picture changes frame; S4: little picture changes frame.Device has been set two switch W1, and W2 can at any time carry out big or small picture sound and show switching and change frame.

The device clock takes place

The device clock is the requisite link of device operate as normal, and it offers device synchronizing signal and the high frequency master clock phase-locked with line frequency.This paper device clock is phase-locked theory and theoretical typical case's application in television equipment synchronously.

Synchronous signal generating circuit for reproduced image correctly, requires receiving end and makes a start synchronous scanning in television equipment, therefore must add lock-out pulse in picture signal.Because ccd signal does not comprise synchronizing signal, for the signal that CCD is come out becomes real pal signal so that correctly show on monitor, this paper finishes the synchronous of ccd signal with the synchronizing signal of the PAL-system that HD440072 provided of Hitachi, Ltd.The synchronizing signal that HD440072 can be used for PAL-system, TSC-system and SECAM-system takes place, and this paper has adopted the signal [5] of its PAL-system.The frequency accuracy of its line frequency and field frequency meets the requirement of 25Hz biasing basically less than frequency tolerance ± 0.001% that PAL-system requires between color subcarrier frequency and the line frequency, thereby the requirement of synchronizing signal basic symbols standardization PAL-system.This synchronous generating circuit is widely used in the industrial television picture pick-up device, and the synchrodrive in the external single tube video camera also adopts this scheme in a large number.

The phase-locked some pixel clock of high frequency master clock and line frequency is the needs that show, reliable and stable global clock is the assurance of the inner reliably working of FPGA simultaneously.Therefore with the global clock of the phase-locked generation high frequency of line frequency 15.625kHz master clock 44.3MHz as FPGA inside, producing some pixel clock and image acquisition and all driving signal and the control signals of display device by it is to satisfy the scheme of matching requirements optimum.It is big to be locked into the phase-locked multiple of 44.3MHz from line frequency, is a difficult problem of phase locking frequency multiplying.Select the MC44145 of Motorola Inc. to constitute the phase locking frequency multiplying circuit, because MC44145 is integrated phase locking frequency multiplying circuit, the integrated level height, peripheral control is simple, and it is special phase-locked at line frequency.Through calculating and obtaining best phase-locked parameter through experiment adjustment repeatedly, make phase-locked stablely and reach phase-locked precision, voltage controlled oscillator output frequency Δ f/f ≈ ± 10-6 satisfies the requirement of its long-time stability and short-term stability.

The FPGA of device realizes

Device adopts the device EPF10K50-4 of the U.S. FLEX10K of altera corp series to realize installing all control functions, comprises the control of the display buffer of CCD sequencing contro and complexity.Device control is realized by programming by fpga chip, the description of hardware capability can be gone up at " software " fully and be realized, in debug process, constantly change the improvement that " software " just can reach hardware capability, the new design conception of this " soft " hardware makes device have extremely strong motility and adaptability.By the exploitation of FPGA to TC221, can be on the basis that does not change hardware circuit, on " software ", design corresponding program as required respectively to reach the driving that realizes other CCD device, for a conveniently approach is explored in the exploitation and the use of other CCD device in the future.Device can be used as the fexible unit of CCD device exploitation.EPF10K50-4 chip typical gate number is 50000, available door from 36000 to 11600,2880 logical blocks, there is the RAM of 2k inside, can fully satisfy the requirement of complicated display buffer control, and the FPGA device is as the core of device control, its on-the-spot flexibly alterability, allocative abilities is very convenient to the various improvement of device again, can also further improve the performance of device on the basis of not changing hardware circuit.The FPGA device comprises a large amount of gate circuits makes the device reliability height, and the integrated level height has been reduced the number of the volume that installs panel.

Through the debugging of device, the function of image acquisition and display buffer control device panel has been debugged and has been finished, and working stability is reliable, below is the part debug results with the logic analyser intercepting.

Device has obtained the synchronizing signal of pal mode of standard and the reliable and stable high frequency master clock that offers FPGA based on phase-locked principle.Device adopts present up-to-date device FIFO, VRAM to constitute the video display buffer of the core device of device.Device adopts the advanced at present whole logic functions of FPGA technology implement device, produces all control signals, comprises that CCD drives signal, all control signals of FIFO, VRAM in the complicated display buffer.The cycle of debugging has greatly been shortened in the use of FPGA technology on the one hand, has improved the reliability of device; Because it comprises a large amount of gate circuits and makes device panel integrated level height, volume is little on the other hand.Because the use of FPGA device, device has extremely strong motility, adaptability and versatility, and can realize modification and expansion to existing capability at short notice on the basis of not changing hardware circuit.

The wireless transmitter module structure is seen Fig. 3;

Transmitter parameter

Parameter	Index
		Transmitting power	10mW
Frequency band	2.4GHz to 2.4835GHz
		The A/V modulation	Frequency modulation (color video and high fidelity stereo audio)
The video pattern of the input	NTSC or PAL
		The video incoming level	1Vp-p (standard color video incoming level)
Power supply	DC9V，500Ma

*Infrared receiver	433.92MHz ASK/-90Bm sensitivity
		Overall dimensions	155mm(W)*166mm(D)*45mm(H)
Weight	50g

Receiver parameters, the receiver module structure is seen Fig. 4;

Parameter	Index
		Operating distance	160 meters visions do not have and block
Sensitivity	-90dBm
		The video output level	1Vp-p (standard color video output level)
Audio output level	1Vp-p (the stereo output level of standard)
		Power supply	DC	12V，500Ma
*Infrared receiver	433.92MHz ASK/10mW transmitting power
		Overall dimensions	155mm(W)*166mm(D)*455mm(H)
Weight	420g

The supporting electric situation situation of this device is as follows:

Adopt 2.4GHz wireless audio and video transceiver, frequency range 2.400GHz-2.483GHz.

(2.450GHz 2.468GHz), strengthens motility and reliability for 2.414GHz, 2.432GHz to have contact 4 channel switch.

Emitter and receptor can be in co-channel paired uses, also can be co-channel one-to-many use that (emitter transmits, the co-channel reception of a plurality of receptors, be equivalent to the wireless video allotter), also can multi-to-multi use that (each emitter takies 1 channel, support the audio frequency of looking of 4 channels to transmit at most, do not crosstalk mutually).

Emitter normal sensibility 10dBm, receptor minimum sensitivity-88dBm, the video signal that the normal degree of stability of frequency ± 100KHz receives is steady and audible, and color is true to nature, the clear no noise of sound.

Support the video transmission and the stereo audio transmission of NTSC or pal mode.

Unique 433MHz wireless backhaul remote signal realizes that " infrared-wireless-infrared " extends the mode remote control at a distance.

It is built-in that all antennas (2.4GHz and 433MHz transmit and receive antenna) are the F type.

Transmitter input end can be connected with the equipment that VGA-to-TV video converter, video camera, CMOS photographic head, VCD/DVD player, remote controller, DVB, STB, sound equipment, computer sound card, mike etc. have the output of video or audio frequency, and video and audio signal are wirelessly transmitted to receptor.

The receptor outfan can be connected with the equipment that television set, LCD TV, plasm TV, magnetic tape video recorder, DVR, video projector, telecomputer receiver, audio amplifier etc. have an input of video or audio frequency.

The devices at full hardware design need not to install any software, and easy accessibility is convenient to move, and removes loaded down with trivial details wiring from and executes.

Extremely low power consumption, the external power source of emitter and receptor are 9 volts 200 milliamperes of direct currents.

Operating temperature range :-10 ℃-+60 ℃.

Wireless transmission distance can reach 300 feet (about 91 meters) farthest at field.

Claims (1)

1, wireless electronic endoscope camera head, comprise scope, endoscopic camera structure and TV monitor, it is characterized in that: described endoscopic camera structure is the wireless electronic endoscope image mechanism, comprises charge-coupled device, Flame Image Process control module, high-energy battery and wireless transmitter module; The input of charge-coupled device is connecting the outfan of optics adapter, and its outfan is connecting the Flame Image Process control module; The outfan of Flame Image Process control module is connecting the input that output signal frequency is the wireless transmitter module of 1.2-2.7GHz, and its other end is connecting high-energy battery; The other end of wireless transmitter module is also connecting high-energy battery; Described TV monitor is connecting the wireless receiver that receive frequency is 1.2-2.7GHz.

Images