CN101737659A - Adaptive cold light source - Google Patents

Adaptive cold light source Download PDF

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Publication number
CN101737659A
CN101737659A CN200910312716A CN200910312716A CN101737659A CN 101737659 A CN101737659 A CN 101737659A CN 200910312716 A CN200910312716 A CN 200910312716A CN 200910312716 A CN200910312716 A CN 200910312716A CN 101737659 A CN101737659 A CN 101737659A
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CN
China
Prior art keywords
cpu
video
light
motor
value
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Pending
Application number
CN200910312716A
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Chinese (zh)
Inventor
宋振生
王雷记
姜瑞举
马明博
孙毅
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WEIHAI WEGO MEDICAL SYSTEM CO Ltd
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WEIHAI WEGO MEDICAL SYSTEM CO Ltd
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Application filed by WEIHAI WEGO MEDICAL SYSTEM CO Ltd filed Critical WEIHAI WEGO MEDICAL SYSTEM CO Ltd
Priority to CN200910312716A priority Critical patent/CN101737659A/en
Publication of CN101737659A publication Critical patent/CN101737659A/en
Pending legal-status Critical Current

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Abstract

The invention relates to an adaptive cold light source, which consists of a case, a power circuit board, a bulb, a light guide bundle connector, a control circuit, a cooling fan, a motor, a shading plate and a video input terminal. A video signal is connected into the control circuit; the video signal is subjected to amplification of a video amplifying circuit and analog-to-digital conversion, and then is analyzed and processed by a CPU to have a maximum value; and by using the value, a motor dimming circuit controls the motor to drive the shading plate to rotate at different angles so as to control the output light intensity through non-shading, partial shading and full shading for the output light, and the output light intensity is adaptively adjusted so as to fulfill the aim of an light-source adaptive camera for luminance requirement and provide luminance required for the camera and a photographed object.

Description

Adaptive cold light source
Technical field
The present invention relates to a kind of correlative technology field of Medical Devices, specifically a kind of medical adaptive cold light source that can be in use.
Background technology
As everyone knows, at present, the cold light source that endoscope uses in the medicine equipment is to adopt bulb type light mostly both at home and abroad, after cooling, focusing, arrive endoscope inside by Optical Fiber Transmission, wherein the type of bulb is mainly divided following 4 types: Halogen lamp LED alveolitoid, xenon lamp type, Metal halogen lamp type, short-arc lamp, its power minimum be short-arc lamp, first three plants power 100W~350W.All there are some shortcomings in above-mentioned bulb source: power is big, heating is big, the life-span is short.In addition.Existing Medical Cold Light Source is lighted post-concentration Jiao in a scope at bulb, and brightness is very high, is connected to Optical Fiber Transmission to apparatus through connector, and the light beam of high brightness can be to the potential harm of photosensitive material generation on every side.Cold light source is not in the market also resolved the contradiction of output intensity and the various potential safety hazards that cause according to thing heat absorption (catch fire, patient harm, dazzling etc.).Although the light intensity regulating function is all arranged, but most applications doctor can transfer to maximum with the light source output intensity, the consequence that causes is that sometimes the medical worker takes down light guide bundles from sight glass, throw away everywhere and forgotten the pass light source somewhere, if bright dipping place has combustibles such as black cotton class, then be easy to the incident of catching fire because of absorption to light.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of rational in infrastructure, operation, easy to use, energy-conservation, safety, by detecting the situation of change automatically adjust light strength output of the video luminance signal of being introduced, avoid higher source luminance other objects to be produced the adaptive cold light source of harm.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of adaptive cold light source, it is by cabinet, power supply circuit board, bulb, the light guide bundles connector, control circuit, cooling fan, motor, anti-dazzling screen, video input terminal is formed, cabinet inserts the 220V AC power and is connected to power supply circuit board, power supply circuit board is converted into the required direct current of bulb work with the 220V alternating current, control through control circuit, deliver to bulb the two poles of the earth and light bulb, it is characterized in that: in vision signal Access Control circuit, vision signal is amplified through video amplifier circuit, analog to digital conversion, after carrying out analyzing and processing, gets CPU its maximum again, and control motor drive anti-dazzling screen with this value by the motor light adjusting circuit and rotate different angles, realization is not blocked output light, partial occlusion, block the light intensity of controlling output entirely, output intensity is carried out self adaptation regulate.To reach the self adaptation purpose of the required illumination of video camera, for the video camera object provides required illumination.
The present invention introduces vision signal in the video amplifier circuit, by detecting the situation of change of the video luminance signal part voltage amplitude of being introduced, comes automatically adjust light strength output.Video amplifier circuit is by R32, C20, R36, C21, operational amplifier A, R37, C23, operational amplifier B, diode D11, D12, C24, R38, R39 forms, vision signal video in links to each other with resistance R 32, vision signal is through resistance R 32, capacitor C 20 is carried out every directly, amplify through operational amplifier A again with negative feedback loop, operational amplifier B through having negative feedback loop carries out the secondary amplification again, again through diode D11, D12 and capacitor C 24, resistance R 39 forms the magnitude of voltage that is directly proportional with the vision signal intensity of input, send CPU (ADI) end to carry out the A/D conversion, thereby obtain the required numerical value VS that is directly proportional with the input video luminance signal value.As shown in Figure 3.
The said CPU of the present invention has A/D analog to digital conversion function, and the pin that the ADI end that carries the video voltage amplitude signal is connected to CPU is the input of A/D conversion, and CPU is check and analysis VS value and control motor with this and regulate light intensity and export incessantly.
The said motor light adjusting circuit of the present invention is by the control pin (MOT+ of CPU, MOT-) through resistance R 24, R30 is connected to triode Q2, the base stage of Q4, Q2, the colelctor electrode of Q4 is again respectively by resistance R 23, R28 is connected to triode Q1, the base stage of Q3, triode Q1, the emitter stage of Q3 and power supply (+12V) be connected, triode Q1, the colelctor electrode of Q3 is by diode D10, D12 and resistance R 15 are connected to motor potentiometer M1, triode Q5, Q6 respectively and meet a diode D11, D13, and link to each other with motor potentiometer M and resistance R 15, during revolution, drive the centre cap interlock of potentiometer, centre cap links to each other with the pin with A/D function (18 pin) of CPU, the value (VL) of the A/D conversion gained in CPU is corresponding with the value of potentiometer, and its VL value is always corresponding with the light intensity of adaptive cold light source output; Drive anti-dazzling screen during revolution and be synchronized with the movement, realize the output intensity adjusting by shield portions light mode.Under the control of CPU, motor always drives anti-dazzling screen and does small swing in certain position, to produce minor variations but do not influence the light intensity output of normal shooting, for CPU judge video camera whether normally use condition is provided.
The present invention adopts technique scheme, by introducing vision signal, and with vision signal through amplification, analog to digital conversion send CPU to handle, CPU carries out getting its maximum after the analyzing and processing, adjusted light intensity, detect the video luminance signal situation of change of being introduced partly by automatic adjusting output intensity, come automatically adjust light strength output.Against existing technologies, the invention has the beneficial effects as follows (1), regulate high light output automatically, can not cause and catch fire, reduce security risk significantly: export when light source has high light, but do not insert sight glass, or abnormal shooting, then CPU is by regulating the light source output intensity, and analyze the video data that obtains, and then do not change, be in below the threshold value, then CPU transfers to light output intensity minimum, fool proof automatically.(2), the normal use, the low light intensity of output, to keep the required optimal brightness of video camera, can reduce sight glass front end heating: in fact, video camera has automatic gain control function, when light stronger, video camera reduces gain, when light is darker, camera gain improves, to obtain to have lightness stabilized video.But it is too strong to work as light, or light is too dark, exceeds the camera gain adjustable range, the too dark also noise of speck or image will occur and increase the weight of, most applications, the doctor uses does not need too strong light, thereby suitably reduces the output intensity of light source by CPU according to the video signal data that detects, and video camera still can obtain constant picture quality, that is to say, under the prerequisite that does not influence image quality, light source intensity is adjusted to proper state, can effectively reduce the temperature rise of sight glass front end.(3), according to doctor's hobby, set the brightness of image that is obtained: be provided with register in the light source,, satisfy different doctors' demand to store relevant brightness value.Realize safe, energy-conservation, the high life of Medical Cold Light Source.It is applicable to the Medical Devices illumination, as illuminations such as various diagnostic equipments, endoscopic imagings.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done to describe further:
Fig. 1 is a composition structural representation of the present invention.
Fig. 2 is a control circuit schematic diagram of the present invention.
Fig. 3 is a video amplifier circuit schematic diagram of the present invention.
Fig. 4 is a motor light adjusting circuit schematic diagram of the present invention.
Number in the figure is: 1. cabinet, 2. power supply circuit board, 3. bulb, 4. light guide bundles connector, 5. control circuit, 6. cooling fan, 7. motor, 8. anti-dazzling screen, 9. video input terminal.
The specific embodiment
As can be seen from Figure 1, a kind of medical energy-saving safety cold light source, it is made up of cabinet 1, power supply circuit board 2, bulb 3, light guide bundles connector 4, control circuit 5, cooling fan 6, motor 7, anti-dazzling screen 8, video input terminal 9 etc.Described cabinet 1 is the carrier of all building blocks, the 220V AC power is connected to power supply circuit board 2, through power supply circuit board 2 the 220V electric main is converted into the voltage and current that bulb 3 can normally use, the control circuit 5 of flowing through is again controlled, and is connected to bulb 3 again and lights; Light guide bundles connector 4 is installed in the cabinet 1, be used for by optical fiber be connected with other Medical Devices.Cooling fan 6 also is installed on the cabinet 1, is used for bulb etc. is cooled off.Above-mentioned composition structure belongs to prior art, no longer describes in detail.
The present invention is with in the vision signal Access Control circuit, control circuit 5 connects the video output terminal 9 of video camera, vision signal is amplified through video amplifier circuit, analog to digital conversion, by CPU the vision signal that inserts is analyzed, after carrying out analyzing and processing, gets CPU its maximum, and be worth with this and drive anti-dazzling screen by motor light adjusting circuit control motor and rotate different angles, realization is not blocked output light, partial occlusion, block the light intensity of controlling output entirely, output intensity is carried out self adaptation to be regulated, to reach the self adaptation purpose of the required illumination of video camera, for the video camera object provides required illumination.Control circuit 5 connects motor 7 and rotates under the control of CPU; Motor 7 drives anti-dazzling screen 8 and regulates output intensity.
The signal of CPU of the present invention control motor is from video amplifier circuit etc.Video amplifier circuit is got 1/10 the vision signal from video camera, send CPU to handle through amplification, analog to digital conversion.Because the particularity of vision signal, CPU will carry out analyzing and processing to the data that obtain, and gets its maximum.When CPU changes light source intensity by motor, normal operating position, just there is subject in the sight glass front end, the then also corresponding increase of illumination that obtains of video camera or reduce, show that video camera also can increase or reduce by the corresponding voltage amplitude of brightness (gray scale) part of the vision signal of video line output, also the phase strain is big or diminish for the video data VS that obtains of CPU thus; If improper use and leaving unused, then sight glass the place ahead does not have object or light guide bundles not to connect sight glass or shooting Host Shutdown, then the illumination of video camera acquisition does not have to change substantially, the also not bigger variation of the voltage amplitude of the video luminance signal (gray scale) of corresponding video camera output, then the video data VS that obtains of CPU changes small.So CPU just can this judge whether light source needs the illumination that provides enough, and regulates light intensity thus.
As Fig. 2, shown in Figure 3, the present invention introduces vision signal in the control circuit for light source, by detecting the situation of change of the video luminance signal part voltage amplitude of being introduced, comes automatically adjust light strength output.Described video amplifier circuit is by R32, C20, R36, C21, operational amplifier A, R37, C23, operational amplifier B, diode D11, D12, C24, R38, R39 forms, vision signal video-in links to each other with resistance R 32, vision signal is through resistance R 32, capacitor C 20 is carried out every directly, amplify through operational amplifier A again with negative feedback loop, operational amplifier B through having negative feedback loop carries out the secondary amplification again, again through diode D11, D12 and capacitor C 24, resistance R 39 forms the magnitude of voltage that is directly proportional with the vision signal intensity of input, send CPU (ADI) end to carry out the A/D conversion, thereby obtain the required numerical value VS that is directly proportional with the input video luminance signal value.The said CPU of the present invention has A/D analog to digital conversion function, and the pin that the ADI end that carries the video voltage amplitude signal is connected to CPU is the input of A/D conversion, and CPU is check and analysis VS value and control motor with this and regulate light intensity and export incessantly.
As Fig. 2, shown in Figure 4.The said motor light adjusting circuit of the present invention is by the control pin (MOT+ of CPU, MOT-) through resistance R 24, R30 is connected to triode Q2, the base stage of Q4, Q2, the colelctor electrode of Q4 is again respectively by resistance R 23, R28 is connected to triode Q1, the base stage of Q3, triode Q1, the emitter stage of Q3 and power supply (+12V) be connected, triode Q1, the colelctor electrode of Q3 is by diode D10, D12 and resistance R 15 are connected to motor potentiometer M1, triode Q5, Q6 respectively and meet a diode D11, D13, and link to each other with motor potentiometer M and resistance R 15, during rotation, drive the centre cap interlock of potentiometer, centre cap links to each other with the pin with A/D function (18 pin) of CPU, the value (VL) of the A/D conversion gained in CPU is corresponding with the value of potentiometer, and its VL value is always corresponding with the light intensity of adaptive cold light source output; Drive anti-dazzling screen during revolution and be synchronized with the movement, realize the output intensity adjusting by shield portions light mode.Under the control of CPU, motor always drives anti-dazzling screen and does small swing in certain position, to produce minor variations but do not influence the light intensity output of normal shooting, for CPU judge video camera whether normally use condition is provided.
Motor light adjusting circuit of the present invention can use a kind of CPU of the A/D of having conversion, also can use the A/D conversion integrated circuit and the CPU combination that does not have the A/D function of a slice special use separately.
Control circuit operation principle of the present invention: vision signal video sends into amplifier A through 2 pin of R32, C20, amplifier A and amplifies, and export from 1 pin, amplify through R37, C33, amplifier B, by the output of 7 pin, AD1 (19 pin) end that enters CPU through D11, D12, C24, R39 carries out the A/D conversion again.The gray value of video is big more, and the signal amplitude of then corresponding CPU19 pin is big more, and the value (VS) that obtains through the A/D conversion is just big; Otherwise the video gray value is little, and the VS value is just little.The light intensity control circuit is by 1,2 pin of CPU, corresponding MOT+, MOT-, the circuit that the high-low level of output is formed by R1, Q2, Q3, Q4, Q5, Q6, R15, motor M1 makes motor M1 that forward and backward rotation take place, and drive the output that an anti-dazzling screen is controlled light intensity, and the resistance value of the potentiometer RE of interlock changes thereupon with it.When MOT+ is a high level, when MOT-was low level, motor was just changeing and drives anti-dazzling screen and rotate, and blocks less light, and output light strengthens, and meanwhile the potentiometer resistance of holding over the ground increases, and numerical value (VL) becomes big after 18 pin of CPU carry out the A/D conversion; Otherwise when MOT+ is a low level, MOT-is a high level, and after CPU18 pin A/D conversion, the VL value just reduces.
The course of work of the present invention is: it is that high level, MOT-are low level that CPU at first puts MOT+, make light source output strengthen, then CPU analyzes the VS value of video behind A/D that obtains, if VS also increases thereupon, prove the target bit of being made a video recording in normal near field image formation state, work as the VS value during this and diminish, output light is strengthened, when the VS value becomes big, just reduce output intensity, thereby realize light source and the adaptive purpose of the required illumination of shooting.
When the output of CPU control light intensity increases, if the VS value does not change or changes very little, within threshold value, illustrate that light guide bundles does not insert endoscope, or whole system do not enter normal user mode, promptly do not have the near field imaging, light source output has just changed, and video camera does not obtain corresponding illumination, at this moment light source output can be maintained low light intensity state, to improve security; Even under low light intensity output state, CPU is still constantly changing light intensity output among a small circle, and cycle detection VS value, in case the VS value has had bigger variation, proof video camera and endoscope have entered normal operating conditions, and just there has been object in the sight glass near field, and the VS value becomes big with the gradation of image value, at this moment the light source output valve also increases rapidly under CPU control, makes whole system enter normal operating conditions.

Claims (4)

1. adaptive cold light source, it is by cabinet, power supply circuit board, bulb, the light guide bundles connector, control circuit, cooling fan, motor, anti-dazzling screen, video input terminal is formed, cabinet inserts the 220V AC power and is connected to power supply circuit board, power supply circuit board is converted into the required direct current of bulb work with the 220V alternating current, control through control circuit, deliver to bulb the two poles of the earth and light bulb, it is characterized in that: in vision signal Access Control circuit, vision signal is amplified through video amplifier circuit, analog to digital conversion, after carrying out analyzing and processing, gets CPU its maximum again, and control motor drive anti-dazzling screen with this value by the motor light adjusting circuit and rotate different angles, realization is not blocked output light, partial occlusion, block the light intensity of controlling output entirely, output intensity is carried out self adaptation regulate.
2. adaptive cold light source according to claim 1, it is characterized in that: said video amplifier circuit is by R32, C20, R36, C21, operational amplifier A, R37, C23, operational amplifier B, diode D11, D12, C24, R38, R39 forms, vision signal video-in links to each other with resistance R 32, vision signal is through resistance R 32, capacitor C 20 is carried out every directly, amplify through operational amplifier A again with negative feedback loop, operational amplifier B through having negative feedback loop carries out the secondary amplification again, again through diode D11, D12 and capacitor C 24, resistance R 39 forms the magnitude of voltage that is directly proportional with the vision signal intensity of input, send CPU (ADI) end to carry out the A/D conversion, thereby obtain the required numerical value VS that is directly proportional with the input video luminance signal value.
3. adaptive cold light source according to claim 1, it is characterized in that: CPU has A/D analog to digital conversion function, the pin that the ADI end that carries the video voltage amplitude signal is connected to CPU is the input of A/D conversion, and CPU is check and analysis VS value and control motor with this and regulate light intensity and export incessantly.
4. adaptive cold light source according to claim 1, it is characterized in that: said motor light adjusting circuit is by the control pin (MOT+ of CPU, MOT-) through resistance R 24, R30 is connected to triode Q2, the base stage of Q4, Q2, the colelctor electrode of Q4 is again respectively by resistance R 23, R28 is connected to triode Q1, the base stage of Q3, triode Q1, the emitter stage of Q3 and power supply (+12V) be connected, triode Q1, the colelctor electrode of Q3 is by diode D10, D12 and resistance R 15 are connected to motor potentiometer M1, triode Q5, Q6 respectively and meet a diode D11, D13, and link to each other with motor potentiometer M and resistance R 15, during revolution, drive the centre cap interlock of potentiometer, centre cap links to each other with the pin with A/D function (18 pin) of CPU, the value (VL) of the A/D conversion gained in CPU is corresponding with the value of potentiometer, and its VL value is always corresponding with the light intensity of adaptive cold light source output; Drive anti-dazzling screen during revolution and be synchronized with the movement, realize the output intensity adjusting by shield portions light mode.
CN200910312716A 2009-12-30 2009-12-30 Adaptive cold light source Pending CN101737659A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102499617A (en) * 2011-10-20 2012-06-20 上海欧太医疗器械有限公司 Endoscope brightness automatic regulation device and regulation control method thereof
CN105371120A (en) * 2015-11-26 2016-03-02 佛山市南海区联合广东新光源产业创新中心 LED lamp capable of dissipating heat efficiently

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102499617A (en) * 2011-10-20 2012-06-20 上海欧太医疗器械有限公司 Endoscope brightness automatic regulation device and regulation control method thereof
CN105371120A (en) * 2015-11-26 2016-03-02 佛山市南海区联合广东新光源产业创新中心 LED lamp capable of dissipating heat efficiently
CN105371120B (en) * 2015-11-26 2018-11-23 佛山市南海区联合广东新光源产业创新中心 A kind of efficiency heat-radiating LED lamp

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Open date: 20100616