CN112656353A - Antifog type anorectal endoscope - Google Patents
Antifog type anorectal endoscope Download PDFInfo
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- CN112656353A CN112656353A CN202110135190.8A CN202110135190A CN112656353A CN 112656353 A CN112656353 A CN 112656353A CN 202110135190 A CN202110135190 A CN 202110135190A CN 112656353 A CN112656353 A CN 112656353A
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Abstract
The invention discloses an anti-fog anorectal endoscope; comprises a shell; the shell is made of transparent materials and is of a bag body structure, the interior of the shell is in a hollow state, one end of the shell is provided with a camera lens, the camera lens is embedded in the shell, one end, close to the camera lens, of the interior of the shell is provided with at least one heating element, the heating element is arranged on a fixing plate, the fixing plate is fixed in the shell, a lens is arranged at the center of one side, away from the heating element, of the fixing plate, the lens and the camera lens are located on the same horizontal plane, and the center of the camera lens coincides with the center of the lens; the anti-fog temperature control system is arranged, and the sectional heating method is adopted to heat the camera lens of the endoscope, so that the problem of fogging of the endoscope is fundamentally solved, the imaging definition is increased, the examination efficiency is improved, and the lesion examination accuracy is improved.
Description
Technical Field
The invention belongs to the field of anorectal examination instruments, and particularly relates to an anti-fog anorectal endoscope.
Background
The presence of a rectal flap, ulcer, polyp, tumor, foreign body, etc. can be observed through an endoscope to see if there is an internal orifice such as a fistula, hemorrhoid, polyp, rectum, tumor, etc.
However, when the endoscope is used for examination, because the endoscope is generally made of glass materials or resin materials, when the endoscope enters a human body, water vapor in the body is liquefied when encountering an endoscope camera lens with lower temperature, water mist is generated, imaging definition is influenced, display blurring is caused, normal examination is influenced, a focus cannot be found accurately in time, examination efficiency is low, and comfort of a patient is poor; meanwhile, when the current endoscope is used for examination, the external connecting line is generally continuously screwed for driving and controlling, so that the motion posture is influenced when the endoscope is used for detection in the intestinal tract, the speed and the direction of the endoscope are not easy to control, and the endoscope is not beneficial to accurately acquiring the information of a lesion part in the intestinal tract by a doctor.
Chinese patent application No. 201921624052.0 discloses an intestinal endoscope, including endoscope head, endoscope head one end is connected with the connection dead lever and is connected the dead lever other end and be fixed with the connection fixed block, the connection fixed block other end is equipped with connecting tube. The intestinal endoscope is provided with a through hole on the connecting fixing rod, the inner aperture of the through hole is equal to the outer diameter of the hose, and the hose can conveniently penetrate through the through hole on the connecting fixing rod due to the design; the technology is driven by an external connecting line, the flexibility is insufficient, and the endoscope lens is easy to generate a fogging phenomenon during examination, so that the examination efficiency is low, and the accuracy of pathology is poor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an anti-fog anorectal endoscope, wherein a permanent magnet is arranged in a shell, and when the external part generates a rotating magnetic field through magnetic field superposition, the permanent magnet embedded in the shell is driven to move in an intestinal tract; the endoscope is driven to move back and forth in the intestinal tract by pressure due to different pressures generated in the front and the back of the spiral ring, and the pressure and an external magnetic field generate mutual synergistic effect to jointly act on the endoscope, so that the flexibility of movement is improved, and the inspection efficiency is improved; the anti-fog temperature control system is arranged, and the sectional heating method is adopted to heat the camera lens of the endoscope, so that the problem of fogging of the endoscope is fundamentally solved, the imaging definition is increased, the examination efficiency is improved, and the lesion examination accuracy is improved.
The invention provides the following technical scheme:
an anti-fog anorectal endoscope; comprises a shell; the shell is made of transparent materials and is of a bag body structure, the interior of the shell is in a hollow state, one end of the shell is provided with a camera lens, the camera lens is embedded in the shell, one end, close to the camera lens, of the interior of the shell is provided with at least one heating element, the heating element is arranged on a fixing plate, the fixing plate is fixed in the shell, a lens is arranged at the center of one side, away from the heating element, of the fixing plate, the lens and the camera lens are located on the same horizontal plane, and the center of the camera lens coincides with the center of the lens; illuminating lamps are arranged on two sides of the lens; the shell is internally provided with an image processing module, the image processing module is in signal connection with the camera lens, the image processing module receives and processes image information collected by the camera lens, the image processing module is connected with a controller, the controller is connected with a CAN bus, and the CAN bus is connected with a signal wire and transmits the image information to an external terminal;
a battery is also arranged in the shell and provides electric energy for the camera lens, the image processing module and the controller; the endoscope also comprises an anti-fog temperature control system, the temperature of the camera lens is heated to the maximum dew point temperature in the human body by controlling the anti-fog temperature control system, the constant temperature control of the camera lens is realized, and the phenomenon that the camera lens of the endoscope is fogged is eliminated.
Preferably, the inside of casing is equipped with the permanent magnet, the permanent magnet is the inner wall of cyclic annular distribution at the casing, the surface of casing is equipped with the spiral ring, the spiral ring is the silica gel material.
Preferably, the permanent magnet is a neodymium iron boron permanent magnet, and is magnetized in the radial direction.
Preferably, the heating element is formed by connecting one or more pairs of P-type and N-type semiconductors through electrodes to form a complete circuit, and is sandwiched between two ceramic sheets.
Preferably, the antifogging anorectal endoscope adopts an antifogging temperature control system, and is characterized in that the antifogging temperature system comprises a control module, a temperature module and a communication module; the control module comprises a controller and a control circuit, the temperature module comprises a temperature acquisition module and a temperature control module, the temperature acquisition module acquires the temperature of the camera lens and the temperature of the environment of the endoscope by arranging a temperature sensor, the temperature control module comprises a heating element and a heating circuit, and the communication module realizes data transmission and recording of the system.
Preferably, after the temperature collecting module collects the surface temperature of the camera lens, the temperature value of the surface of the camera lens is input to the controller; and meanwhile, the temperature control module inputs the current value of the heating circuit to the controller, then the controller compares the surface temperature value of the lens with the maximum allowable temperature, simultaneously compares the current value of the heating circuit with the maximum allowable current, carries out the next heating operation when the current value of the heating circuit and the maximum allowable current are both in the maximum allowable safety value range, and otherwise, the system stops and the power supply is turned off.
Preferably, the temperature acquisition module acquires the intestinal environment where the endoscope is located, compares the surface temperature of the camera lens with the average temperature of the intestinal tract and the heating temperature of the instrument, and determines whether to start a temperature control mode; the heating circuit voltage changes in the heating process of the temperature control mode, so that the heating element is adjusted to heat, and when the temperature of the camera lens is higher than the temperature of the set intestinal environment, the heating element keeps constant temperature.
Preferably, the control method of the anti-fog temperature control system comprises the following steps:
s1: analyzing the intestinal environment where the endoscope is located, and finding out the relation between the intestinal environment temperature and the dew point temperature;
s2: determining the variation range of the dew point temperature according to the intestinal environment temperature;
s3: the target value of endoscope temperature control is defined according to the variation range of the dew point temperature, sectional heating is adopted through a temperature control module, and when the temperature of the camera lens is higher than the dew point temperature of the intestinal tract environment, the fogging phenomenon is eliminated.
Preferably, in the step S3, the step heating is divided into three stages, namely a, the initial state antifogging temperature range is 36.5-37.3 ℃; b, the secondary heating antifogging temperature range is 37.3-38.5 ℃; c, the antifogging temperature range of the third heating is 38.5-40.5 ℃.
Preferably, when the endoscope is used for endoscopy, the endoscope is sent into the anorectal cavity, the permanent magnet arranged in the endoscope is matched with an external magnetic field for driving, an internal power supply is not consumed, and the reduction of the volume of the endoscope is facilitated; the external magnetic field adopts two groups of Helmholtz coils, currents with different strengths are introduced, and after the currents form a certain phase relationship, a rotating magnetic field is generated in a large space range, so that a permanent magnet in the endoscope is driven to move; the permanent magnet is in a radial magnetization mode, an external magnetic field is formed, a rotating magnetic field is generated along with the change of current harmonic waves in the Helmholtz coil in the direction of magnetic force lines of a space magnetic field pointed by the permanent magnet, a magnetic force distance is applied to the capsule, so that the endoscope rotates in an intestinal tract, forming a pressure film with a thickness h, forming a liquid pressure p by the spiral ring, acting force is generated on the endoscope, the endoscope is pushed to move along the axial direction, at the moment, the component force of the endoscope along the circumferential direction forms partial resisting moment, the two parts of resisting moment act together, the moving direction of the endoscope can be vertically changed, the angle of the endoscope is controlled, the thread lead angle of the spiral ring is theta, the thread depth is h, the number of thread lines is n, and r is the radius of the cylinder of the endoscope by adjusting the normal direction of the plane of the rotating magnetic field; in order to further improve the synergistic effect and realize the movement of the endoscope in any direction, the rotation angle phi of the endoscope satisfies the following conditions: phi = cos theta/(r + h) +2 pi/n (sin theta cos theta); in the above formula, r and h are in mm; because different pressures can be generated in the front and back of the spiral ring, the pressure drives the endoscope to move in the intestinal tract in the front and back direction, and the pressure and an external magnetic field generate mutual synergistic effect to jointly act on the endoscope, so that the movement flexibility is improved.
In addition, in the process of temperature control, in order to more accurately control the temperature, reduce the temperature error and increase the accuracy of temperature data acquisition, a temperature sensor connecting circuit is arranged, an ADT temperature sensor is adopted, and a pin 1 is used for serial data input and output and is connected with a CAN bus SDA; pin 2 is a serial clock input and is connected with a CAN bus SCL; pin 4 is grounded, and a capacitor is arranged between pin 5 and pin 8 and has a capacitance of 0.1 uF; pins 6 and 7 are connected to a 3.3V power supply.
Preferably, camera lens adopts the sapphire mirror surface, and the camera is fixed flat wall heat conduction, reduces the influence of thermal resistance to heating element heating, for the accurate degree that increases temperature control, reduces the error, strengthens antifog effect, and the area of lens of making a video recording is A, and the thermal resistance that conducts heat is R, then R satisfies: r = η · L/(k · a); l is the thickness of the camera lens in mm; k is the thermal conductivity, in W/(m. DEG C); a unit m2(ii) a R unit ℃/W; eta thermal resistance coefficient, the value range is 0.26-3.68.
Preferably, the semiconductor heating and cooling plate is used as a heating element at the inner side of the camera lens, when direct current passes through a galvanic couple formed by connecting two different semiconductor materials in series, the semiconductor generates joule heat, and two ends of the galvanic couple can absorb and release heat respectively, so as to further increase the measurement precision and reduce the influence of the heat absorption of the semiconductor on the camera lens, and the heat release quantity of the semiconductor with the temperature difference of T is Q and satisfies Q = t.I.T; q units of Joule; i is heating current in ampere; t is the Thomson coefficient, and T is given in degrees Celsius; under the combined action of the semiconductor heating and refrigerating piece and the camera lens, the accuracy of sectional type heating is better promoted, the temperature error is reduced, and the thickness L of the camera lens meets the requirements of heat conductivity coefficient k, area A and semiconductor heat release quantity for Q: k · a = λ · (IT)/L; lambda is a relation coefficient and has a value range of 0.32-26.88.
When the control module controls the heating element to heat by changing current, a segmented heating mode is adopted, an initial state is started before the endoscope enters a human body, the heating temperature is 37.3 and is close to the temperature of the human body, so that the comfort of a patient is increased, and the phenomenon that the ice-cold camera lens inevitably generates fog when entering a wet intestinal environment is prevented, the accuracy of image acquisition of the endoscope is influenced, and the inspection time is delayed; when the endoscope reaches the environment temperature of the intestinal tract, the environment temperature of the intestinal tract is increased due to the heating of the endoscope, the temperature of the camera lens is lower than the environment temperature of the intestinal tract again, a secondary heating antifogging state is started, the controller controls the semiconductor heating and refrigerating sheet to perform secondary heating to reach 37.3-38.5 ℃, the dew point of the environment of the intestinal tract is changed, and the fogging is prevented; the endoscope is driven to move in the intestinal environment by an external rotating magnetic field, the rotating magnetic field does work on the permanent magnet in the shell to generate heat, the permanent magnet and the permanent magnet have a mutual effect, the temperature of the intestinal environment rises again, and at the moment, the triple heating antifogging state is started and heated to 38.5-40.5 ℃; the camera lens is prevented from being fogged; because the intestinal environment adaptation temperature is limited, therefore, the controller controls the semiconductor heating refrigeration piece to be 40.5 to the highest heating temperature of camera lens, prevents to scald the intestinal, increases safety in utilization.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the antifogging anorectal endoscope, the permanent magnets are arranged in the shell, and when the permanent magnets are superposed outside through magnetic fields to generate a rotating magnetic field, the permanent magnets embedded in the shell are driven to move in an intestinal tract; carry out the inspection, at the outside spiral ring that sets up of casing simultaneously, the endoscope forms one deck pressure membrane when rotatory, forms the liquid pressure difference through the spiral ring that sets up, produces the effort to the endoscope, and promotes the endoscope along axial motion, because can produce different pressure around the spiral ring, pressure drive endoscope seesaw in the intestinal to produce mutual synergism with the outer magnetic field, coact in the endoscope, improve the flexibility of motion, improve inspection efficiency.
(2) According to the anti-fog anorectal endoscope, the camera lens of the endoscope is heated by adopting a sectional heating method through the anti-fog temperature control system, so that the problem of fogging of the endoscope is solved fundamentally, the imaging definition is increased, the examination efficiency is improved, and the lesion examination accuracy is improved.
(3) According to the antifogging anorectal endoscope, the endoscope is driven by the external rotating magnetic field to be combined with the set temperature control system, the sectional heating process is set, the dew point of the intestinal environment is changed, the camera lens is prevented from being fogged, the use comfort is improved, the detection efficiency is improved, the accuracy of temperature control is improved, and the use safety is improved.
(4) The invention relates to an antifogging anorectal endoscope, which limits the relationship among the thread lead angle of a spiral ring, the thread depth, the thread number and the cylindrical radius of the endoscope; the synergistic effect of the magnetic field and the rotating magnetic field is further improved, the movement of the endoscope in any direction is realized, and the flexibility of the movement of the endoscope is further enhanced.
(5) According to the antifogging anorectal endoscope, the temperature sensor connecting circuit is arranged, and the ADT temperature sensor is adopted, so that the temperature can be more accurately controlled, the temperature error is reduced, and the accuracy of temperature data acquisition is improved.
(6) The invention provides an antifogging anorectal endoscope, which further increases the measurement precision and reduces the influence of the self heat absorption of a semiconductor on a camera lens by limiting the relation of the heat release quantity of the semiconductor with the temperature difference of T.
(7) The invention relates to an antifogging anorectal endoscope, which limits the relation among the thickness, the heat conductivity coefficient and the area of a camera lens and the heat release quantity of a semiconductor; the sectional type heating accuracy is better promoted, the temperature error is reduced, the examination efficiency is improved, and the diagnosis accuracy is improved for doctors.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of the rotating magnetic field drive of the present invention.
Fig. 3 is a schematic view of the axial movement principle of the present invention.
Fig. 4 is a schematic view of the principle of the present invention for arbitrary angular rotation of the housing.
Fig. 5 is a block diagram of the anti-fog temperature control system of the present invention.
Fig. 6 is a circuit diagram of the temperature sensor connection of the present invention.
Fig. 7 is a circuit diagram of a communication interface of the present invention.
FIG. 8 is a table of the temperature change of the lens versus the thermal conductivity resistance at different voltages in accordance with the present invention.
In the figure: 1. a housing; 2. a camera lens; 3. a heating element; 4. a permanent magnet; 5. a helical ring; 6. a lens; 7. an illuminating lamp; 8. an image processing module; 9. a battery; 10. a controller; 11. a CAN bus; 12. a signal line; 13. an external magnetic field; 14. (ii) an intestinal environment; 15. rotating the magnetic field; 16. and (7) fixing the plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, an anti-fog anorectal endoscope; comprises a shell 1; the shell 1 is made of transparent materials, the shell 1 is of a bag body structure, the interior of the shell 1 is in a hollow state, one end of the shell 1 is provided with a camera lens 2, the camera lens 2 is embedded in the shell 1, one end, close to the camera lens 2, of the interior of the shell 1 is provided with at least one heating element 3, the heating element 3 is arranged on a fixing plate 16, the fixing plate 16 is fixed in the shell 1, a lens 6 is arranged at the center of one side, far away from the heating element 3, of the fixing plate 16, the lens 6 and the camera lens 2 are located on the same horizontal plane, and the center of the camera lens 2 is overlapped with the center of the lens 6; illuminating lamps 7 are arranged on two sides of the lens 6; an image processing module 8 is further arranged inside the shell 1, the image processing module 8 is in signal connection with the camera lens 2, the image processing module 8 receives, processes and transmits image information collected by the camera lens 2, the image processing module 8 is connected with a controller 10, the controller 10 is connected with a CAN bus 11, the CAN bus 11 is connected with a signal line 12, and the image information is transmitted to an external terminal;
a battery 9 is also arranged in the shell 1, and the battery 9 provides electric energy for the camera lens 2, the image processing module 8 and the controller 10; the endoscope also comprises an anti-fog temperature control system, the temperature of the camera lens 2 is heated to the maximum dew point temperature in the human body through controlling the anti-fog temperature control system, the constant temperature control of the camera lens 2 is realized, and the phenomenon that the camera lens 2 of the endoscope is fogged is eliminated.
The permanent magnet type solar cell module comprises a shell 1, wherein a permanent magnet 4 is arranged inside the shell 1, the permanent magnet 4 is annularly distributed on the inner wall of the shell 1, a spiral ring 5 is arranged on the outer surface of the shell 1, and the spiral ring 5 is made of silica gel; the permanent magnet 4 is a neodymium iron boron permanent magnet 4 and is magnetized in the radial direction; the heating element 3 is formed by connecting one or more pairs of P-type and N-type semiconductors through electrodes to form a complete circuit and clamping the complete circuit in two ceramic sheets.
Example two:
on the basis of the first embodiment, as shown in fig. 2-4, when performing endoscopy, the endoscope is sent into the anorectal cavity, and the permanent magnet 4 arranged inside the endoscope is driven by matching with an external magnetic field 13, so that an internal power supply is not consumed, and the volume of the endoscope is favorably reduced; the external magnetic field 13 adopts two groups of Helmholtz coils, currents with different strengths are introduced, and after the currents form a certain phase relationship, a rotating magnetic field 15 is generated in a large space range, so that the permanent magnet 4 in the endoscope is driven to move; the permanent magnet 4 is in a radial magnetization mode, an external magnetic field is formed, a rotating magnetic field 15 is generated along with the change of current harmonic waves in the Helmholtz coil in the direction of magnetic force lines of a space magnetic field pointed by the permanent magnet 4, a magnetic force distance is applied to the capsule, so that the endoscope rotates in an intestinal tract, when the endoscope rotates, a pressure film is formed, the thickness of the pressure film is h, a liquid pressure p is formed through the spiral ring 5, acting force is generated on the endoscope, the endoscope is pushed to move along the axial direction, at the moment, the component force of the endoscope along the circumferential direction forms partial resisting moment, the two parts of resisting moment act together, the moving direction of the endoscope can be vertically changed, the angle of the endoscope is controlled, the thread lead angle of the spiral ring 5 is theta, the thread depth is h, the number of thread lines is n, and r is the radius of the cylinder of the endoscope by adjusting the normal direction of the plane of the rotating magnetic field 15; in order to further improve the synergistic effect and realize the movement of the endoscope in any direction, the rotation angle phi of the endoscope satisfies the following conditions: phi = cos theta/(r + h) +2 pi/n (sin theta cos theta); in the above formula, r and h are in mm; because the spiral ring 5 can generate different pressures front and back, the pressure drives the endoscope to move front and back in the intestinal tract, and the pressure and the external magnetic field 13 generate mutual synergistic action to jointly act on the endoscope, so that the movement flexibility is improved.
Example three:
as shown in fig. 5-7, on the basis of the first embodiment, the anti-fog anorectal endoscope adopts an anti-fog temperature control system, wherein the anti-fog temperature system comprises a control module, a temperature module and a communication module; the control module comprises a controller 10 and a control circuit, the temperature module comprises a temperature acquisition module and a temperature control module, the temperature acquisition module acquires the temperature of the camera lens 2 and the temperature of the environment of the endoscope by arranging a temperature sensor, the temperature control module comprises a heating element 3 and a heating circuit, and the communication module realizes data transmission and recording of the system.
After the temperature acquisition module acquires the surface temperature of the camera lens 2, inputting the surface temperature value of the camera lens 2 into the controller 10; meanwhile, the temperature control module inputs the current value of the heating circuit to the controller 10, then the controller 10 compares the surface temperature value of the lens with the maximum allowable temperature, compares the current value of the heating circuit with the maximum allowable current, and performs the next heating operation when the current value of the heating circuit and the maximum allowable current are both within the maximum allowable safe value range, otherwise, the system stops and the power supply is turned off.
The temperature acquisition module acquires an intestinal environment 14 where the endoscope is located, compares the surface temperature of the camera lens 2 with the average temperature of the intestinal tract and the heating temperature of the instrument, and determines whether to start a temperature control mode; the voltage of the heating circuit changes in the heating process in the temperature control mode, so that the heating element 3 is adjusted to heat, and when the temperature of the camera lens 2 is higher than the temperature of the set intestinal environment 14, the heating element 3 keeps constant temperature.
A method of controlling an anti-fog temperature control system, the method comprising the steps of:
s1: analyzing the intestinal environment 14 where the endoscope is located, and finding out the relation between the temperature of the intestinal environment 14 and the dew point temperature;
s2: determining the variation range of the dew point temperature according to the temperature of the intestinal environment 14;
s3: the target value of endoscope temperature control is defined according to the variation range of the dew point temperature, sectional heating is adopted by the temperature control module, and when the temperature of the camera lens 2 is higher than the dew point temperature of the intestinal environment 14, the fogging phenomenon is eliminated.
In the step S3, the segmented heating is divided into three stages, a, the initial state antifogging temperature range is 36.5-37.3 ℃; b, the secondary heating antifogging temperature range is 37.3-38.5 ℃; c, the antifogging temperature range of the third heating is 38.5-40.5 ℃.
When the control module controls the heating element 3 to heat by changing current, a segmented heating mode is adopted, an initial state is started before the endoscope enters a human body, the heating temperature is 37.3 and is close to the temperature of the human body, so that the comfort of a patient is increased, and the phenomenon that the ice-cold camera lens inevitably generates fog when entering a wet intestinal environment 14 is prevented, the accuracy of image acquisition of the endoscope is influenced, and the inspection time is delayed; when the endoscope reaches the temperature of the intestinal environment 14, the temperature of the intestinal environment 14 is increased due to the fact that the intestinal environment 14 is changed, the temperature of the camera lens 2 is lower than the temperature of the intestinal environment 14 again, a secondary heating anti-fog state is started, the controller 10 controls the semiconductor heating refrigerating sheet to perform secondary heating to reach 37.3-38.5 ℃, the dew point of the intestinal environment 14 is changed, and fogging is prevented; the endoscope is driven to move in the intestinal environment 14 by the external rotating magnetic field 15, the rotating magnetic field 15 applies work to the permanent magnet 4 in the shell 1 to generate heat, the permanent magnet and the permanent magnet have mutual action, the temperature of the intestinal environment 14 rises again, and at the moment, the triple heating antifogging state is started to be heated to 38.5-40.5 ℃; the camera lens 2 is prevented from fogging; because the temperature adaptation of the intestinal environment 14 is limited, the controller 10 controls the maximum heating temperature of the semiconductor heating and refrigerating sheet to the camera lens 2 to be 40.5, so that the intestinal tract is prevented from being scalded, and the use safety is improved.
Example four
As shown in fig. 8, in addition, in the first embodiment, in the process of performing temperature control, in order to perform temperature control more accurately, reduce temperature error, and increase accuracy of temperature data acquisition, a temperature sensor connection circuit is provided, an ADT temperature sensor is adopted, a pin 1 is used for serial data input and output, and is connected to a CAN bus 11 SDA; pin 2 is a serial clock input and is connected with CAN bus 11 SCL; pin 4 is grounded, and a capacitor is arranged between pin 5 and pin 8 and has a capacitance of 0.1 uF; pins 6 and 7 are connected to a 3.3V power supply.
When a semiconductor heating and refrigerating sheet is used as a heating element 3 at the inner side of the camera lens 2, when direct current passes through a galvanic couple formed by connecting two different semiconductor materials in series, the semiconductor generates joule heat, and two ends of the galvanic couple can absorb and release heat respectively, so that the influence of the self heat absorption of the semiconductor on the camera lens is further increased, the influence of the self heat absorption of the semiconductor on the camera lens is reduced, and the heat release quantity of the semiconductor with the temperature difference of T is Q and satisfies Q = t.I.T; q units of Joule; i is heating current in ampere; t is the Thomson coefficient, and T is given in degrees Celsius; under the combined action of semiconductor heating refrigeration piece and camera lens 2, better promoted the accuracy nature of sectional type heating, reduced temperature error, camera lens 2 thickness L is coefficient of heat conductivity k, area A and semiconductor heat release are satisfied for Q: k · a = λ · (IT)/L; lambda is a relation coefficient, and the value range of lambda is 0.32-26.88; as can be seen from the table in fig. 8, the higher the thermal conductivity resistance is, the lower the raised temperature is, the inverse ratio between the two is obtained, and the temperature is not greatly affected by the forward and reverse voltages; the higher the voltage, the higher the temperature rise, and the lower the voltage-to-moon temperature rise.
The device obtained by the technical scheme is an antifogging anorectal endoscope, and the permanent magnets are arranged in the shell, so that when the permanent magnets are superposed outside through magnetic fields to generate a rotating magnetic field, the permanent magnets embedded in the shell are driven to move in an intestinal tract; the endoscope is driven to move back and forth in the intestinal tract by pressure due to different pressures generated in the front and the back of the spiral ring, and the pressure and an external magnetic field generate mutual synergistic effect to jointly act on the endoscope, so that the flexibility of movement is improved, and the inspection efficiency is improved; the camera lens of the endoscope is heated by the arranged antifogging temperature control system and a sectional heating method, so that the problem of fogging of the endoscope is fundamentally solved, the imaging definition is increased, the examination efficiency is improved, and the lesion examination accuracy is improved; the endoscope is driven by an external rotating magnetic field to be combined with the set temperature control system, a sectional heating process is set, the dew point of the intestinal environment is changed, the camera lens is prevented from being fogged, the use comfort is improved, the detection efficiency is improved, the accuracy of temperature control is improved, and the use safety is improved; by limiting the relationship between the thread lead angle of the spiral ring, the thread depth, the thread number and the radius of the endoscope cylinder; the synergistic effect of the magnetic field and the rotating magnetic field is further improved, the movement of the endoscope in any direction is realized, and the flexibility of the movement of the endoscope is further enhanced; by arranging the temperature sensor connecting circuit and adopting the ADT temperature sensor, the temperature control is more accurately carried out, the temperature error is reduced, and the accuracy of temperature data acquisition is improved; by limiting the relation of the semiconductor heat release with the temperature difference of T, the measurement precision is further increased, and the influence of the heat absorption of the semiconductor on the camera lens is reduced; by defining the relation among the thickness, the heat conductivity coefficient, the area and the heat release of the semiconductor of the camera lens; the sectional type heating accuracy is better promoted, the temperature error is reduced, the examination efficiency is improved, and the diagnosis accuracy is improved for doctors.
Other technical solutions not described in detail in the present invention are prior art in the field, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An anti-fog anorectal endoscope; comprises a shell (1); the portable electronic camera is characterized in that the shell (1) is made of transparent materials, the shell (1) is of a bag body structure, the interior of the shell (1) is in a hollow state, a camera lens (2) is arranged at one end of the shell (1), the camera lens (2) is embedded in the shell (1), at least one heating element (3) is arranged at one end, close to the camera lens (2), of the interior of the shell (1), the heating element (3) is arranged on a fixing plate (16), the fixing plate (16) is fixed in the shell (1), a lens (6) is arranged at the center of one side, away from the heating element (3), of the fixing plate (16), the lens (6) and the camera lens (2) are located on the same horizontal plane, and the center of the camera lens (2) coincides with the center of the lens (6); illuminating lamps (7) are arranged on two sides of the lens (6); the shell (1) is internally provided with an image processing module (8), the image processing module (8) is in signal connection with the camera lens (2), the image processing module (8) receives, processes and transmits image information acquired by the camera lens (2), the image processing module (8) is connected with a controller (10), the controller (10) is connected with a CAN bus (11), the CAN bus (11) is connected with a signal line (12), and the image information is transmitted to an external terminal;
a battery (9) is also arranged in the shell (1), and the battery (9) provides electric energy for the camera lens (2), the image processing module (8) and the controller (10); the endoscope also comprises an anti-fog temperature control system, the temperature of the camera lens (2) is heated to the maximum dew point temperature in the human body through controlling the anti-fog temperature control system, the constant temperature control of the camera lens (2) is realized, and the phenomenon that the camera lens (2) of the endoscope is fogged is eliminated.
2. The anti-fog anorectal endoscope according to claim 1, wherein the permanent magnet (4) is arranged inside the shell (1), the permanent magnet (4) is annularly distributed on the inner wall of the shell (1), the outer surface of the shell (1) is provided with a spiral ring (5), and the spiral ring (5) is made of silica gel.
3. An anti-fogging anorectal endoscope according to claim 2 wherein said permanent magnet (4) is a neodymium iron boron permanent magnet (4) magnetized radially.
4. An anti-fogging anorectal endoscope according to claim 1 characterised in that said heating element (3) is formed by one or more pairs of P-type and N-type semiconductors connected by electrodes to form a complete circuit and sandwiched between two ceramic sheets.
5. An anti-fog anorectal endoscope according to any one of claims 1 to 4 and wherein said anorectal endoscope adopts an anti-fog temperature control system, wherein said anti-fog temperature system comprises a control module, a temperature module and a communication module; the control module comprises a controller (10) and a control circuit, the temperature module comprises a temperature acquisition module and a temperature control module, the temperature acquisition module acquires the temperature of the camera lens (2) and the temperature of the environment of the endoscope through a temperature sensor, the temperature control module comprises a heating element (3) and a heating circuit, and the communication module realizes data transmission and recording of the system.
6. The anti-fog temperature control system according to claim 5, wherein after the temperature acquisition module acquires the surface temperature of the camera lens (2), the temperature value of the surface of the camera lens (2) is input into the controller (10); meanwhile, the temperature control module inputs the current value of the heating circuit to the controller (10), then the controller (10) compares the surface temperature value of the lens with the maximum allowable temperature, simultaneously compares the current value of the heating circuit with the maximum allowable current, and carries out the next heating operation when the current value of the heating circuit and the maximum allowable current are both in the maximum allowable safety value range, otherwise, the system stops and the power supply is turned off.
7. The anti-fog temperature control system according to claim 6, wherein the temperature acquisition module acquires the intestinal environment (14) of the endoscope and compares the surface temperature of the camera lens (2) with the average intestinal temperature and the heating temperature of the instrument to determine whether to start the temperature control mode; the voltage of the heating circuit changes in the heating process in the temperature control mode, so that the heating element (3) is adjusted to heat, and when the temperature of the camera lens (2) is higher than the temperature of the set intestinal environment (14), the heating element (3) keeps constant temperature.
8. The method of any one of claims 5-7, wherein the method comprises the steps of:
s1: analyzing the intestinal environment where the endoscope is located, and finding out the relation between the intestinal environment temperature and the dew point temperature;
s2: determining the variation range of the dew point temperature according to the intestinal environment temperature;
s3: the target value of endoscope temperature control is defined according to the variation range of the dew point temperature, sectional heating is adopted through a temperature control module, and when the temperature of the camera lens is higher than the dew point temperature of the intestinal tract environment, the fogging phenomenon is eliminated.
9. The anti-fog temperature control system of claim 8, wherein in the step S3, the staged heating is divided into three stages, a, the initial state anti-fog temperature range is 36.5-37.3 ℃; b, the secondary heating antifogging temperature range is 37.3-38.5 ℃; c, the antifogging temperature range of the third heating is 38.5-40.5 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110135190.8A CN112656353A (en) | 2021-02-01 | 2021-02-01 | Antifog type anorectal endoscope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110135190.8A CN112656353A (en) | 2021-02-01 | 2021-02-01 | Antifog type anorectal endoscope |
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| CN112656353A true CN112656353A (en) | 2021-04-16 |
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| CN202110135190.8A Pending CN112656353A (en) | 2021-02-01 | 2021-02-01 | Antifog type anorectal endoscope |
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