CN117883195A - Oral cavity laser therapeutic instrument for realizing automatic power calibration and handle support device thereof - Google Patents

Abstract

The invention discloses an oral cavity laser therapeutic apparatus for realizing automatic power calibration, which comprises: a primary laser that provides laser light to different fiber optic heads. The optical fiber handle is inserted into the accommodating cavity, and a sensing device for detecting whether the optical fiber handle is inserted is arranged in the accommodating cavity. A laser detector for converting the optical signal from the optical fiber handle into a voltage signal. After receiving the inserted information of the optical fiber handle, the main controller controls the primary laser to work, acquires the detected voltage signal, judges the type of the optical fiber head matched with the optical fiber handle according to the voltage signal value, finds a preset voltage value or a preset current value, and changes the power of the primary laser according to the positive correlation between the primary laser power and the output laser power. The defect that the transmission efficiency is reduced after the transmission efficiency of the transmission optical fibers with different core diameters is different and the disposable optical fiber head is added is overcome, the accurate calibration of the optical fiber power can be realized at an application end, and the calibration can be carried out once before each use, so that the accuracy of the operation is greatly improved.

Description

Oral cavity laser therapeutic instrument for realizing automatic power calibration and handle support device thereof

Technical Field

The invention belongs to the field of medical laser calibration, and particularly relates to an oral cavity laser therapeutic instrument for realizing automatic power calibration and a handle support device thereof.

Background

In the prior art, laser therapeutic apparatuses are increasingly used, for example, semiconductor laser therapeutic apparatuses, and the application of semiconductor laser almost covers all aspects of the field of oral medicine, such as periodontal treatment, oral mucosa disease, cyst excision, tumor excision and the like.

The optical fiber handle of the laser therapeutic apparatus can be replaced by different optical fiber heads according to the requirement, for example, the optical fiber head with the core diameter of 200 mu m is used for the treatment of root canal, such as root canal swashing, hemostasis and the like; the 300 mu m core diameter optical fiber head is used for scraping and treating periodontitis, periodontal pocket and the like; a 400 μm fiber optic head for frenulum removal, gingival removal, etc.; a 600 μm core fiber optic head was used for surgical treatment.

Because of processing accuracy and coupling problems, the transmission efficiency is different for each type of fiber optic head, resulting in a single use fiber optic head of the same core diameter, and when installed in a fiber optic handle, the power output from the ends may not be uniform. Thereby affecting the physician's judgment of laser performance and further resulting in prolonged treatment time or oversherapy. On the other hand, due to the limitations of laser technology, the laser itself will also attenuate its power over time during use. There is a need for a device that automatically calibrates the power functions prior to use of the fiber optic handpiece.

Disclosure of Invention

The invention aims to provide an oral cavity laser therapeutic instrument for realizing automatic power calibration and a handle support device thereof, so as to realize automatic power calibration.

In order to achieve the technical effects, the technical scheme of the invention is as follows:

an oral laser therapeutic apparatus for achieving automatic power calibration, comprising:

the primary laser is used for providing laser for different optical fiber heads;

the optical fiber handle comprises an accommodating cavity, a sensing device and a control device, wherein the accommodating cavity is used for inserting an optical fiber handle comprising an optical fiber head, and the sensing device is arranged in the accommodating cavity and used for detecting whether the optical fiber handle is inserted into the accommodating cavity;

the laser detector is used for converting an optical signal emitted by the optical fiber handle into a current signal by using a photodiode, and converting the current signal into a voltage signal by an I/V conversion circuit;

the main controller is used for controlling the oral cavity laser therapeutic instrument to execute work, after receiving the inserted information of the optical fiber handle transmitted by the sensing device, controlling the primary laser connected with the optical fiber handle to work, acquiring a voltage signal corresponding to the output laser of the detection optical fiber handle output by the laser power detector, judging the type of the optical fiber head matched with the optical fiber handle according to the voltage signal value, finding out the preset voltage value or the preset current value of the type, changing the power of the primary laser according to the positive correlation between the power of the primary laser and the laser power output by the optical fiber handle until the detected current/voltage information is consistent with the preset current/voltage, and realizing the automatic power calibration.

The sensing devices are symmetrically arranged at two sides in the accommodating cavity and adopt micro switches; after the optical fiber handle is inserted into the accommodating cavity, the circumference of a section which is in contact with the optical fiber handle is continuously increased along with the increase of the circumference of the section, the optical fiber handle gradually extrudes the sensing devices at two sides, and after the optical fiber handle is completely inserted, the optical fiber handle is limited and fixed in the accommodating cavity, and the sensing devices are completely closed so as to send the inserted information of the optical fiber handle.

Specifically, the laser detector is arranged at the bottom in the accommodating cavity, a detection port is formed, and after the optical fiber handle is inserted into the accommodating cavity, the optical fiber head of the optical fiber handle is aligned with the detection port under the limit action of the sensing device, so that the laser output by the optical fiber handle is collected.

The I/V conversion circuit comprises an amplifier and a feedback resistor, wherein the current signal obtained by the photodiode is input to the negative phase end of the amplifier, and the amplified voltage signal is output by the output end of the amplifier under the positive feedback effect of the feedback resistor.

Specifically, the main controller is configured to determine the received voltage signal, determine whether the voltage signal reaches a preset corresponding voltage value of the corresponding optical fiber head type, if so, determine a difference ratio between the current detected current value and the preset current value, and select a corresponding output power value according to the calculated difference ratio.

A handle support device for realizing automatic power calibration, comprising any one of the oral laser therapeutic apparatuses for realizing automatic power calibration, comprising:

the pen rack comprises a pen rack shell, wherein an inlet is formed in one end of the pen rack shell, an accommodating cavity is formed by extending inwards from the inlet along the axial direction, the accommodating cavity is used for accommodating an optical fiber handle, and the horizontal radial width of the accommodating cavity from the opening inwards is narrowed from wide;

the other end of the accommodating cavity, which is opposite to the inlet, is provided with a detection groove, and a laser detector is arranged in the detection groove and is used for converting an optical signal sent by the optical fiber handle into a current signal by using a photodiode and then converting the current signal into a voltage signal by an I/V conversion circuit;

limiting grooves are formed in two sides, close to the detection grooves, of the accommodating cavity, and sensing devices are arranged in the limiting grooves and used for detecting whether optical fiber handles are inserted into the accommodating cavity.

Wherein, the pen rack shell comprises an upper shell and a lower shell which are detachably connected;

the upper shell and the lower shell are respectively provided with a first groove and a second groove, and the first groove and the second groove are spliced to form an accommodating cavity;

the other ends of the first groove and the second groove, which are opposite to the inlet, are respectively provided with a limiting groove, and the two limiting grooves are spliced to form a detection groove;

the limiting grooves are arranged on two sides of the second groove and are close to two sides of the detection groove;

the lower shell is provided with a connecting piece, and the connecting piece is a protruding block arranged on the end face of the side edge of the lower shell and is fixedly connected with the laser therapeutic instrument host; the side of the upper shell is provided with a connecting groove which is used for limiting the connecting piece when the upper shell is connected with the lower shell.

Specifically, the lower shell is provided with a wiring groove and an outlet, the wiring groove is arranged in the side wall of the lower shell and bypasses the limiting groove to be communicated with the two limiting grooves, and the wiring groove is used for accommodating a signal line; the wire outlet is arranged on one side provided with the connecting piece and is used for connecting a signal line in the wire groove with a host computer signal of the laser therapeutic instrument.

The laser detector is a miniature power meter comprising a photodiode and an I/V conversion circuit, the miniature power meter is embedded in the detection groove, the photodiode is used for detecting the power of an optical fiber handle inserted into the handle support to obtain a current signal, and the I/V conversion circuit is used for converting the current signal into a voltage signal;

the miniature power meter is equipped with the protection piece on the terminal surface towards the inlet port, and the center department of protection piece has seted up the detection mouth, and the detection mouth is used for receiving the laser that the optic fibre handle sent, and the side of miniature power meter stretches out has the signal connection line, and the signal connection line is connected with laser therapeutic instrument host computer signal through the wiring groove.

Specifically, the limit switch is embedded in the limit groove and comprises a switch shell, a rotating shaft, a rotating piece, a spring, a first pin and a second pin;

the switch shell is provided with a groove body which is used as a rotating space of the rotating piece;

the rotating shafts are respectively connected to the inner walls of the two sides of the tank body and are arranged at the opening part close to the tank body;

the rotating shaft penetrates through the rotating piece, the limiting part of the rotating piece extends out of the groove body to be arranged, after the optical fiber handle is inserted into the accommodating cavity, the limiting parts of the rotating pieces at two sides are gradually extruded along with the perimeter growth of the section of the optical fiber handle, after the optical fiber handle is completely inserted, the optical fiber handle is limited and fixed in the accommodating cavity, and the limit switch is completely closed;

two ends of the spring are respectively connected with the inner wall of the switch shell and the rotating piece;

one end of the first pin extends out of the groove body and is electrically connected with the signal line in the wiring groove, and the other end of the first pin is electrically connected with the rotating piece;

one end of the second pin extends out of the groove body and is electrically connected with the signal line in the wiring groove, and the other end of the second pin is electrically connected with the rotating piece in a rotating state;

after the optical fiber handle is inserted, the spring is extruded by the rotating piece, the rotating piece touches the second pin, and the first pin is communicated with the second pin;

under the non-rotation state, under the effect of spring, the rotating member rotates towards the direction of keeping away from the second pin, and first pin and second pin disconnection.

The limiting groove is provided with a blind hole, the connecting side of the switch shell and the limiting groove is provided with a corresponding fixing convex hole, and the switch shell is connected with the limiting groove in a buckling mode.

By adopting the technical scheme, the invention has the following advantages and positive effects compared with the prior art:

the invention solves the defects that the transmission efficiency of the transmission optical fibers with different core diameters is different, and the transmission efficiency is reduced after the disposable optical fiber head is added, and can realize the accurate calibration of the optical fiber power at the application end, and the calibration can be carried out once before each use, thereby greatly improving the accuracy of the operation.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.

FIG. 1 is a schematic diagram of an oral laser therapeutic apparatus for realizing automatic power calibration according to the present invention;

FIG. 2 is a disassembled view of a handle-holder assembly for automatic power calibration according to the present invention;

FIG. 3 is a block diagram of the upper housing of the present invention;

FIG. 4 is a block diagram of the lower housing of the present invention;

FIG. 5 is a block diagram of a handle support incorporating a miniature power meter according to the present invention;

FIG. 6 is a block diagram of a limit switch of the present invention;

FIG. 7 is a block diagram of a handle bracket incorporating a limit switch of the present invention;

FIG. 8 is a block diagram of the limit switch of the present invention when not triggered;

fig. 9 is a structural diagram of the limit switch of the present invention when triggered.

Description of the reference numerals

1: a pen rack housing; 101: an upper housing; 102: a lower housing; 103: an access port; 104: a detection groove; 105: a limit groove; 106: a first groove; 107: a second groove; 108: a connecting piece; 109: a connection groove; 110: wiring grooves; 111: a wire outlet; 2: a miniature power meter; 201: a protective sheet; 202: a detection port; 203: a signal connection line; 3: a limit switch; 301: a switch housing; 302: a rotation shaft; 303: a rotating member; 304: a first pin; 305: a second pin; 306: fixing the convex hole; 4: an optical fiber handle; 5: a therapeutic apparatus host; 6: and (5) fixing the bracket.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

For the sake of simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.

The oral cavity laser therapeutic instrument and the handle support device thereof for realizing the automatic power calibration are further described in detail below with reference to the accompanying drawings and the specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims.

The disposable fiber optic head core diameter size of the oral laser therapeutic apparatus can be varied according to the therapeutic requirements. For example, 200 μm core fiber heads are used for root canal treatment such as root canal lavage, hemostasis, etc.; the 300 mu m core diameter optical fiber head is used for scraping and treating periodontitis, periodontal pocket and the like; a 400 μm fiber optic head for frenulum removal, gingival removal, etc.; the 600 μm core fiber head is used for surgical treatment and the like. In selecting an oral laser treatment device, the appropriate fiber head size may be selected according to the particular treatment objectives and operational requirements. However, changing a fiber optic head of a different model or size at a time may affect the output power of the oral laser treatment device. This approach presents a number of problems.

Example 1

Referring to fig. 1, the present embodiment provides an oral laser therapeutic apparatus for realizing automatic power calibration, which is distinguished according to an overall structure and can be divided into a laser therapeutic apparatus host, an optical fiber handle and a handle support device.

The handle support device comprises a containing cavity and a sensing device arranged in the containing cavity. The primary laser is connected with the optical path of the optical fiber handle, can provide laser for different optical fiber heads arranged at the transmitting end of the optical fiber handle, and the different optical fiber heads have different core diameter specifications, and can be divided into 200 mu m, 300 mu m, 400 mu m and 600 mu m, and the functions corresponding to the optical fiber heads with different specifications are different, so that the required laser power is also obviously different.

The handle support device comprises a containing cavity, the optical fiber handle can be inserted into the containing cavity, and one end of the optical fiber head preferentially stretches into the containing cavity when the optical fiber handle is inserted. Further, a sensing device is arranged in the accommodating cavity and used for detecting whether an optical fiber handle is inserted into the accommodating cavity. Further, the sensing devices are symmetrically arranged at two sides in the accommodating cavity, and a micro switch can be adopted. After the optical fiber handle is inserted into the accommodating cavity, the circumference of the section of the optical fiber handle contacted by the sensing device is gradually increased along with the continuous extension of the optical fiber handle, and the optical fiber handle extrudes the sensing devices at two sides. After the optical fiber handle is completely inserted, the optical fiber handle is limited and fixed in the accommodating cavity, and the sensing device is completely closed, so that the insertion of the optical fiber handle in the accommodating cavity is detected.

The handle support device also comprises a laser detector, wherein a light signal emitted by the optical fiber handle is converted into a current signal by using a photodiode, and then the current signal is converted into a voltage signal through an I/V conversion circuit. Specifically, the laser detector is arranged at the bottom in the accommodating cavity, a detection port is formed, and after the optical fiber handle is inserted into the accommodating cavity, the optical fiber head of the optical fiber handle is aligned with the detection port under the limit action of the sensing device, so that the laser output by the optical fiber handle is collected. The I/V conversion circuit comprises an amplifier and a feedback resistor, wherein the current signal obtained by the photodiode is input to the negative phase end of the amplifier, and the amplified voltage signal is output by the output end of the amplifier under the positive feedback effect of the feedback resistor.

The main controller is also arranged in the laser therapeutic instrument host, and is a working control center of the example, after receiving the inserted information of the optical fiber handle transmitted by the sensing device, the main controller controls the primary laser connected with the optical fiber handle to work, then acquires a voltage signal corresponding to the output laser of the detection optical fiber handle output by the laser power detector, judges the type of the optical fiber head adapted to the optical fiber handle according to the voltage signal value, finds a preset voltage value or a preset current value of the type, and changes the power of the primary laser until the detected current/voltage information is consistent with the preset current/voltage according to the positive correlation between the power of the primary laser and the laser power output by the optical fiber handle, thereby realizing the automatic power calibration. Wherein, positive correlation refers to the relationship between two variables, when one of the variables increases, the other variable also increases; or when one of the variables decreases, the other variable also decreases. In the positive correlation, the trend of variation among the variables is uniform. In the case that the power of the primary laser is positively correlated with the laser power output by the optical fiber handle, it means that when the power of the primary laser increases or decreases, the laser power output by the optical fiber handle also increases or decreases accordingly. This means that there is a direct correlation between these two variables and that the trend of the change is consistent.

The output power of the laser detector depends on the voltage value information obtained by feedback, the voltage value is compared with a preset voltage to change the output primary laser power until the feedback current information is consistent with the preset current, and the automatic power calibration is realized.

Specifically, a voltage signal of the laser in the optical fiber handle is detected by the laser power detector, the type of the optical fiber handle adaptation is judged according to the voltage signal value, the type of the optical fiber handle adaptation is found, the preset voltage value or the preset current value is found, the power of the primary laser is changed according to positive correlation between the power of the primary laser and the laser power output by the optical fiber handle until the current/voltage information is detected to be consistent with the preset current/current, and the automatic power calibration is realized.

Such as: the four disposable optical fiber heads applied to the oral cavity laser therapeutic apparatus respectively correspond to 90%, 85%, 75% and 65% of power transmission efficiency. Considering the relationship between laser power output and voltage is determined by the operating principle and characteristics of the laser. Generally, there is a relationship between the output power of a laser and its driving current. With a continuous wave laser, there is typically a linear relationship between output power and drive current. That is, a larger drive current results in a higher output power, while a smaller drive current results in a lower output power. This is because the output power of the laser is primarily dependent on the excitation and amplification effects produced by the current through the lasing medium. It is noted, however, that the output power of the laser and the driving voltage are not simply linear. Lasers typically require a certain threshold current to be reached in order to start operating and produce a laser output. Below the threshold current, the laser may be in an unstable or nonlinear operating state with a low output power. After exceeding the threshold current, the output power of the laser increases linearly with the increase of the driving current until reaching its maximum output power. The core of the embodiment is that if the current detected voltage value reaches the preset corresponding voltage value of the type, if the difference ratio between the current detected current value and the preset current value is judged, a linear relationship exists between the current and the output power generally, so that only the corresponding power value needs to be selected according to the specific difference ratio. Considering the accuracy of laser output, loss calculation and the like, a model of current adjustment and output power can be established first, and the output power values corresponding to different accurate current outputs can be obtained through training. Therefore, when a specific current output requirement is confirmed, the model can be directly input to obtain a corresponding output power value, and then the corresponding power of the primary output is carried out through the primary laser.

The implementation described above is that my department considers a very good balance between specific costs and operating efficiency. In this way, a conventional photodiode for receiving high laser output can be selected, the requirement on a conversion circuit for converting current into voltage is not particularly high, and the cost can be well controlled in this state.

The implementation procedure of this embodiment will now be described: after the optical fiber handle is inserted into the handle support, after the oral cavity laser therapeutic instrument selects a laser therapeutic mode, the oral cavity laser therapeutic instrument enters a laser preparation stage, at the moment, the sensing device is in a closed state, and the primary laser sends primary laser to the optical fiber handle under the control of the controller and then is output to the laser detector through the optical fiber handle. The laser detector converts the optical signal into a current signal, and then the current signal is converted into a voltage signal through the I/V conversion circuit and fed back to the main controller, so that the main controller automatically performs closed-loop control on the laser power. Preferably, the linear relation exists between the current and the power, the larger the current is, the higher the power is, when the fed back current is inconsistent with the internally stored current information (the fed back current information is generally smaller than the internally stored current information), the current output is gradually increased, so that the output efficiency of the primary laser is increased, and the power of the output end of the optical fiber handle is calibrated to be accurate at the moment when the fed back current information is consistent with the internally prestored current information.

Example 2

Referring to fig. 1 to 9, in order to realize calibration of different output powers of the optical fiber handpiece 4, this embodiment describes a handpiece holder for realizing automatic calibration of power in detail on the basis of embodiment 1, and the automatic power calibration can be realized by placing the optical fiber handpiece 4 therein. The method specifically comprises the following steps:

referring to fig. 2 to 4, in the present embodiment, an access port 103 is provided at one end of the pen holder housing 1, the optical fiber handle 4 is accessed through the access port 103, and in use, the nib of the optical fiber handle 4 is inserted toward the access port 103. The cavity is obtained by extending the inlet 103 inwards along the axial direction of the embodiment, the cavity can be used for placing the optical fiber handle 4, the inside of the cavity is of a profiling groove structure, the horizontal radial width inwards from the opening is narrowed from wide to narrow, and is close to the shape of the optical fiber handle 4, so that the optical fiber handle 4 is convenient to insert.

Further, a detection groove 104 is provided at the other end of the cavity opposite to the inlet 103, and a laser detector is provided in the detection groove 104 for detecting the laser power of the optical fiber handle 4. In addition, limit grooves 105 are formed on two sides of the cavity, which are close to the detection groove 104, limit switches 3 are arranged in the limit grooves 105 and used for limiting the optical fiber handles 4 and controlling the switches matched with the optical fiber handles 4, and specific description is given later.

Referring to fig. 3 and 4, the pen holder case 1 of the present embodiment may be detachably connected upper and lower cases 101 and 102. The upper shell 101 is provided with a first groove 106, and the lower shell 102 is provided with a second groove 107, so that when the upper shell 101 and the lower shell 102 are connected together, the first groove 106 and the second groove 107 are spliced to form the cavity. The other ends of the first groove 106 and the second groove 107 opposite to the inlet 103 are respectively provided with a limiting groove, so that when the upper shell 101 and the lower shell 102 are connected together, the two limiting grooves are spliced to form the detection groove 104. The limit groove 105 is disposed on the two sides of the second groove 107 and close to the detection groove 104, and the opposite position of the upper housing 101 is a plane, so that the limit switch 3 can be just pressed, and the limit switch 3 cannot move.

In addition, referring to fig. 3 and 4, the lower housing 102 is provided with a connecting member 108, the connecting member 108 is a protruding block provided on a side end surface of the lower housing 102, and bolt holes are provided on the protruding block so that it can be connected with an external laser therapeutic apparatus main body 5 by bolts. The side edge of the upper shell 101 at the corresponding position is provided with a connecting groove 109, so that the connecting piece 108 is just embedded into the connecting groove 109, and plays a limiting role when the upper shell 101 and the lower shell 102 are connected with each other.

In addition, the lower housing 102 is further provided with a wire groove 110, the wire groove 110 is located in the sidewall of the lower housing 102, one of the limiting grooves 105 is used as a starting point, the other limiting groove 105 is used as an ending point, and the wire groove 110 is surrounded by the limiting grooves, and a signal line is accommodated in the wire groove 110. Correspondingly, the lower housing 102 is further provided with an outlet 111, and the outlet 111 is provided on one side provided with the connecting piece 108, so that the signal line in the wiring groove 110 can be in signal connection with the external laser therapeutic apparatus host 5.

Referring to fig. 5, the laser detector is a micro power meter 2, and the micro power meter 2 is embedded in a detection groove 104 to perform power detection on the optical fiber handle 4 inserted in the present embodiment. The miniature power meter 2 is of a cylindrical structure as a whole, a protective sheet 201 of a light spot diode is arranged on the end face facing the inlet 103, a detection port 202 is arranged in the center of the protective sheet 201, and the detection port 202 can receive laser of the optical fiber handle 4. The side of the micro power meter 2 is extended with a signal connection wire 203, and the signal connection wire 203 passes through the wiring groove 110 and winds the wire outlet 111 to enter the laser therapeutic instrument host 5 so as to realize signal connection. The principle is as follows: the intensity of the laser light emitted from the inside of the micro power meter 2 is detected by a photodiode. When laser is emitted, when the laser passes through the micro power meter 2, the photodiode converts an optical signal into a current signal, the current signal is converted into a voltage signal through the I/V conversion circuit, and the voltage signal is fed back to the singlechip, namely the MCU (located in the laser host), so that the MCU can automatically control the laser power in a closed loop.

In fact, the micro-power meter 2 may be implemented with a laser power detector.

For example, a laser power detector, the probe of which is placed on the laser beam output by the optical fiber head to cover the probe completely, so as to obtain an accurate power measurement result and obtain the accurate laser power for detecting the optical fiber.

For a maximum laser output power of 50W in this embodiment, the laser power timing is selected, taking into account the following requirements and considerations:

1. power range: the measurement range of the laser power meter should be able to cover the power range of 0-50W. Ensuring that the rated power range of the selected power meter is able to meet the power requirements of actual use.

2. Wavelength adaptation: the wavelength range of the laser power meter should be matched to the laser wavelength used. Ensuring that the selected power meter is appropriate for the laser wavelength used.

3. Fast response time: the response time of the power meter should be fast enough to ensure that the instantaneous power can be accurately measured when measuring the power.

4. High power bearing capability: for high power lasers, the power meter needs to have sufficient power withstand capability to prevent damage or errors.

5. Accuracy and precision: and selecting a power meter with higher accuracy and precision so as to ensure the accuracy of a measurement result.

6. Periodic calibration and maintenance: the power meter should be calibrated and maintained periodically to ensure accuracy and reliability of the measurement results.

In this way, on the one hand, the laser power meter is large in size and difficult to cooperate with the handle support, on the other hand, the laser power meter is too expensive and has no possibility of being produced at all, and for this purpose, only a photodiode or a laser diode is adopted by me to detect the intensity of laser emission.

Referring to fig. 6 to 9, in the present embodiment, the limit switch 3 is embedded in the limit slot 105, and is essentially a switch for controlling on/off. The limit switch 3 includes a switch housing 301, a rotation shaft 302, a rotation member 303, an elastic member, a first pin 304, and a second pin 305. A groove is formed in the switch housing 301 as a rotation space for the rotator 303. The rotating shafts 302 are respectively connected to the inner walls of the two sides of the tank body, and are disposed near the opening of the tank body, in this embodiment, near a corner of the cavity and the inlet 103. The rotating shaft 302 passes through the rotating member 303, and the limiting part of the rotating member 303 extends out of the groove body to limit the extending optical fiber handle 4. One side of the limiting part close to the inlet 103 is a plane, and the other side is an arc surface. One end of the first pin 304 extends out of the slot body and is electrically connected with a corresponding signal line in the wiring slot 110, and the other end of the first pin 304 is electrically connected with the rotating member 303. One end of the second pin 305 extends out of the slot body and is electrically connected with a corresponding signal line in the wiring slot 110, and the other end of the second pin 305 can be electrically connected with the rotating member 303 in a rotating state. It can be seen that in this embodiment, the wiring groove 110 has three lines in total, namely, two limit switches and the leads of the micro power meter 2.

Both ends of an elastic member (not shown in the drawings) are connected to the inner wall of the switch housing 301 and the rotary member 303, which are springs, respectively. When the optical fiber handle 4 is not inserted, the spring applies a force to the rotating member 303 to rotate in a direction away from the second pin 305, so that the rotating member 303 is in a non-rotating state, the lower limit switch 3 is in a non-contact state, that is, the limit switch 3 is opened, the circuit is in an open state, and laser is not emitted when the control end of the laser therapeutic apparatus host 5 controls laser emission. When the light handle is inserted into the position-limiting switch 3, the spring is extruded, the rotating piece 303 touches the second pin 305, the position-limiting switch 3 is a passage at this time, and the laser is emitted normally when the control end controls the emission of the laser.

In addition, a blind hole is formed in the limit groove 105, and a corresponding fixing convex hole 306 is formed in the side, connected with the limit groove 105, of the switch housing 301, so that the switch housing 301 is in snap connection with the limit groove 105, and a positioning function is achieved.

Referring to fig. 1, the laser therapeutic apparatus main body 5 is fixed on a fixing bracket 6 (optionally 45 °) with an inclination angle, and this embodiment is connected to one side of the laser therapeutic apparatus main body 5 and is also inclined to the horizontal plane. When the optical fiber handle 4 is placed in the cavity, the optical fiber handle 4 can automatically fall into the cavity of the embodiment due to the gravity.

In summary, in the use process of the embodiment, when the optical fiber handle 4 is inserted, the head of the optical fiber handle 4 will first touch the limit switches 3 on both sides, the limit switches 3 are changed from the off state to the on state, and the laser therapeutic apparatus host 5 determines that the optical fiber handle 4 has been inserted after receiving the signal of the connection of the limit switches 3.

Subsequently, a user selects a laser treatment mode through a software control machine, a laser preparation stage is started, laser is emitted to the miniature power meter 2, a photodiode converts an optical signal into a current signal, then the current signal is converted into a voltage signal through an I/V conversion circuit and is fed back to the oral cavity laser treatment instrument host 5, and therefore automatic closed-loop control of the MCU in the oral cavity laser treatment instrument host 5 on the laser power is achieved. Preferably, the linear relation exists between the current and the power, the larger the current is, the higher the power is, when the fed back current is inconsistent with the internally stored current information (the fed back current information is generally smaller than the internally stored current information), the current output is gradually increased until the fed back current information is consistent with the internally stored current information, and at the moment, the power of the output end of the optical fiber handle is calibrated to be accurate power.

After the calibration is completed, the optical fiber handle 4 is pulled out, and the optical fiber head sheath is taken off, so that the optical fiber head can be started to be used.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is within the scope of the appended claims and their equivalents to fall within the scope of the invention.

Claims (11)

1. An oral laser therapeutic apparatus for realizing automatic power calibration, comprising:

the primary laser is used for providing laser for different optical fiber heads;

the optical fiber handle comprises an accommodating cavity, a sensing device and a control device, wherein the accommodating cavity is used for inserting an optical fiber handle comprising an optical fiber head, and the sensing device is arranged in the accommodating cavity and used for detecting whether the optical fiber handle is inserted into the accommodating cavity;

the laser detector is used for converting an optical signal emitted by the optical fiber handle into a current signal by using a photodiode, and converting the current signal into a voltage signal through the I/V conversion circuit;

the main controller is used for controlling the oral cavity laser therapeutic instrument to execute work, after receiving the inserted information of the optical fiber handle transmitted by the sensing device, controlling the primary laser connected with the optical path of the optical fiber handle to work, acquiring a voltage signal output by the laser power detector and corresponding to the detection of the output laser of the optical fiber handle, judging the type of the optical fiber head matched with the optical fiber handle according to the voltage signal value, finding out a preset voltage value or a preset current value of the type, and changing the power of the primary laser according to positive correlation between the power of the primary laser and the laser power output by the optical fiber handle until the detected current/voltage information is consistent with the preset current/voltage, thereby realizing automatic power calibration.

2. The oral cavity laser therapeutic apparatus for realizing automatic power calibration according to claim 1, wherein the sensing devices are symmetrically arranged at two sides in the accommodating cavity and a micro switch is adopted; after the optical fiber handle is inserted into the accommodating cavity, the circumference of a section which is in contact with the optical fiber handle is continuously increased along with the increase of the circumference of the section, the optical fiber handle gradually extrudes the sensing devices at two sides, after the optical fiber handle is completely inserted, the optical fiber handle is limited and fixed in the accommodating cavity, and the sensing devices are completely closed so as to send the inserted information of the optical fiber handle.

3. The oral cavity laser therapeutic apparatus for realizing automatic power calibration according to claim 2, wherein the laser detector is arranged at the bottom in the accommodating cavity, a detection port is formed, and after the optical fiber handle is inserted into the accommodating cavity, the optical fiber head of the optical fiber handle is aligned with the detection port under the limit action of the sensing device, so as to realize laser acquisition output by the optical fiber handle.

4. The oral laser therapeutic apparatus for implementing automatic power calibration according to claim 3, wherein the I/V conversion circuit comprises an amplifier and a feedback resistor, and the current signal obtained by the photodiode is input to a negative phase end of the amplifier, and the amplified voltage signal is output from an output end of the amplifier under the positive feedback action of the feedback resistor.

5. The oral cavity laser therapeutic apparatus for realizing automatic power calibration according to claim 1, wherein the master controller is configured to determine the received voltage signal, determine whether a voltage value corresponding to the preset type of the optical fiber head is reached, if so, determine a difference ratio between the current detected current value and the preset current value, and select a corresponding output power value according to the calculated difference ratio.

6. A handle support device for achieving automatic power calibration, comprised in an oral laser therapeutic apparatus for achieving automatic power calibration according to any one of claims 1 to 5, comprising:

the pen rack comprises a pen rack shell, wherein an inlet is formed in one end of the pen rack shell, the pen rack shell extends inwards from the inlet along the axial direction to obtain a containing cavity, the containing cavity is used for containing an optical fiber handle, and the horizontal radial width of the containing cavity from the opening inwards is narrowed from wide to narrow;

the other end of the accommodating cavity, which is opposite to the inlet, is provided with a detection groove, and a laser detector is arranged in the detection groove and is used for converting an optical signal sent by the optical fiber handle into a current signal by using a photodiode and converting the current signal into a voltage signal by an I/V conversion circuit;

the holding cavity is close to the both sides of detecting the groove have seted up the spacing groove, be equipped with sensing device in the spacing groove for detect whether there is the optical fiber handle to insert in the holding cavity.

7. The handle support device for achieving automatic power calibration of claim 6, wherein the pen rack housing comprises an upper housing and a lower housing detachably connected;

the upper shell and the lower shell are respectively provided with a first groove and a second groove, and the first groove and the second groove are spliced to form the accommodating cavity;

the other ends of the first groove and the second groove, which are opposite to the inlet, are respectively provided with a limiting groove, and the two limiting grooves are spliced to form the detection groove;

the limiting grooves are arranged on two sides of the second groove and close to two sides of the detection groove;

the lower shell is provided with a connecting piece, and the connecting piece is a protruding block arranged on the side end surface of the lower shell and is fixedly connected with the laser therapeutic instrument host; the side of the upper shell is provided with a connecting groove, and the connecting groove is used for limiting the connecting piece when the upper shell is connected with the lower shell.

8. The handle support device for realizing automatic power calibration according to claim 7, wherein the lower housing is provided with a wiring groove and a wire outlet, the wiring groove is arranged in the side wall of the lower housing, and two limiting grooves are communicated by bypassing the limiting groove, and the wiring groove is used for accommodating a signal line; the wire outlet is arranged on one side provided with the connecting piece and is used for connecting the signal line in the wire distribution groove with a host computer of the laser therapeutic instrument.

9. The handle support device for realizing automatic power calibration according to claim 6, wherein the laser detector is a micro power meter comprising the photodiode and the I/V conversion circuit, the micro power meter is embedded in the detection groove, the photodiode is used for detecting the power of the optical fiber handle inserted into the handle support to obtain a current signal, and the I/V conversion circuit is used for converting the current signal into a voltage signal;

the miniature power meter is equipped with the protection piece towards on the terminal surface of inlet port, the center department of protection piece has seted up the detection mouth, the detection mouth is used for receiving the laser that the optic fibre handle sent, the side of miniature power meter stretches out there is the signal connection line, the signal connection line warp the trough is connected with laser therapeutic instrument host computer signal.

10. The handle-bar support device for automatically calibrating power of claim 6, wherein the limit switch is embedded in the limit slot, the limit switch comprising a switch housing, a rotating shaft, a rotating member, a spring, a first pin, and a second pin;

the switch shell is provided with a groove body which is used as a rotating space of the rotating piece;

the rotating shafts are respectively connected to the inner walls of the two sides of the groove body and are arranged at the opening part close to the groove body;

the rotating shaft penetrates through the rotating piece, the limiting part of the rotating piece extends out of the groove body to be arranged, after the optical fiber handle is inserted into the accommodating cavity, the limiting parts of the rotating piece at two sides are gradually extruded along with the increase of the section circumference of the optical fiber handle, after the optical fiber handle is completely inserted, the optical fiber handle is limited and fixed in the accommodating cavity, and the limiting switch is completely closed;

two ends of the spring are respectively connected with the inner wall of the switch shell and the rotating piece;

one end of the first pin extends out of the groove body and is electrically connected with the signal line in the wiring groove, and the other end of the first pin is electrically connected with the rotating piece;

one end of the second pin extends out of the groove body and is electrically connected with the signal line in the wiring groove, and the other end of the second pin is electrically connected with the rotating piece in a rotating state;

after the optical fiber handle is inserted, the spring is extruded by the rotating piece, the rotating piece touches the second pin, and the first pin is communicated with the second pin;

under the non-rotation state, under the effect of the spring, the rotating piece rotates towards the direction away from the second pin, and the first pin is disconnected from the second pin.

11. The handle-bar support device for automatically calibrating power according to claim 10, wherein,

the limiting groove is provided with a blind hole, a corresponding fixing convex hole is formed in the connecting side of the switch shell and the limiting groove, and the switch shell is connected with the limiting groove in a buckling mode.