阅读说明：本技术 一种透镜聚焦式激光接收靶 (Lens focusing type laser receiving target ) 是由 范京道 王春刚 陈洪月 张德生 张乘风 周兴利 王春林 王宇 马英 任怀伟 肖松 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种激光靶中心定位装置,包括清灰装置、角度调节装置和激光接收装置。所述的角度调整架安装在底座上,可以旋转后方的调节杆改变接收装置与激光的角度；接收装置的外壳上端与角度调节架相连,下端与底座相连；清灰装置的出风管有24个出风口,对称分布在四周,每侧个6个负责吹走落在接收装置表面的粉尘；接收装置用螺栓连接固定在外壳上,由玻璃、透镜、光敏元件,机箱四部分组成,机箱和玻璃密封防止煤灰进入,凸透镜由36个小凸透镜组成。激光透过凸透镜聚焦在光敏元件上,通过查看被激活的元件,可以推出激光所打在的位置上。本发明结构简单,操作方便,检测效率高,可以应用在环境恶劣的场合。(The invention discloses a laser target center positioning device which comprises an ash removal device, an angle adjusting device and a laser receiving device. The angle adjusting frame is arranged on the base, and the adjusting rod at the rear can be rotated to change the angle between the receiving device and the laser; the upper end of the shell of the receiving device is connected with the angle adjusting frame, and the lower end of the shell of the receiving device is connected with the base; the air outlet pipe of the ash cleaning device is provided with 24 air outlets which are symmetrically distributed on the periphery, and 6 air outlets on each side are responsible for blowing away dust falling on the surface of the receiving device; the receiving device is fixed on the shell by bolts and comprises four parts of glass, a lens, a photosensitive element and a case, the case and the glass are sealed to prevent coal ash from entering, and the convex lens comprises 36 small convex lenses. The laser is focused on the photosensitive element through the convex lens, and the position where the laser is positioned can be deduced by looking at the activated element. The invention has simple structure, convenient operation and high detection efficiency, and can be applied to occasions with severe environment.)

1. A lens focusing laser receiving target, characterized in that: an angle adjusting device includes: the device comprises a base, a support frame (two short and one long), a connecting rod, an angle adjusting rod and a threaded rod; an ash removal device comprising: an air inlet pipe and an air outlet pipe; a housing, an ash suction device; a laser light receiving device includes: the device comprises a top cover, glass, a box body, a rubber pad, a lens and an internal circuit; the angle adjusting device can change the angle of the laser receiving target for receiving the laser through the rotating angle adjusting rod; the dust removing device is used for removing dust on the surface of the laser receiving target; the laser receiving device focuses laser on a certain photosensitive element, and the central position of the laser can be calculated by detecting the position of an activated photosensitive element in a plurality of photosensitive elements.

2. The angle adjustment apparatus according to claim 1, wherein: the base is arranged on an object to be detected; the two short supporting rods are symmetrically arranged in front of the base; the long supporting rod is arranged in the middle rear part of the center line of the base; the bottoms of the long and short supporting rods are provided with through holes and are fixedly connected with the base through bolts; the top of the long support rod is provided with a through hole which is matched with the angle adjusting rod step platform; the top of the short support rod is provided with a support seat female seat which is fixedly connected with the support seat at the bottom of the shell through an iron column.

3. The angle adjustment apparatus according to claim 1, wherein: the angle adjusting rod consists of an adjusting rod and a fixing cap; the adjusting rod and the fixing cap are arranged on two sides of the long supporting rod for axial fixing; the tail end of the adjusting rod is provided with a handle, and a threaded through hole is formed in the adjusting rod; the fixing cap is internally provided with a through hole, the side surface is provided with a threaded through hole, and the fixing cap is connected, installed and fixed on a boss outside the adjusting rod through a bolt.

4. The angle adjustment apparatus according to claim 1, wherein: the threaded rod is hinged with the connecting rod; the outer part of the threaded rod is provided with threads which are matched with the angle adjusting rod in a spiral way.

5. Angle adjustment device according to claims 2-4, characterized in that: the threaded rod and the connecting rod can be pushed to move forwards or backwards through the rotating angle adjusting rod, so that the laser receiving device is driven to swing forwards or backwards, and the purpose of adjusting the angle is achieved.

6. The ash removal device of claim 1, wherein: the dust cleaning device aims to blow and clean dust on the surface of the laser receiving device, the blowing device comprises an air inlet pipe and an air outlet pipe, and the cleaning device comprises a dust suction device.

7. The blow-up device of claim 6, wherein: the air inlet pipe is externally connected with an air blower, compressed air is sent into the air outlet pipe, the air outlet pipe divides the compressed air into 24 strands, the 24 strands of compressed air are respectively discharged from 24 air outlets of the air outlet pipe, and dust on the glass of the laser receiving device is blown.

8. The dust suction device according to claim 6, wherein: the ash suction device is divided into an upper ash suction device, a lower ash suction device, a left ash suction device and a right ash suction device; the hose at the tail end of the dust suction device is externally connected with an exhaust fan to suck blown dust away.

9. The ash cleaning device according to claim 6-8, characterized in that: the air outlet pipe and the dust suction device of the blowing device are both arranged on the shell; four dust suction devices are arranged on four edges of the front surface of the shell; the upper, the lower, the left and the right sides are respectively provided with six air outlet pipes; two supporting seats are arranged at the bottom of the back and connected with two short supporting rods, and a hinge seat is arranged at the middle upper part of the middle line of the back and is connected with a connecting rod hinge.

10. The laser light receiving device according to claim 1, wherein: the glass is arranged between the top cover and the box body, and the top cover and the box body are both provided with rubber gasket grooves to seal the glass and prevent dust from entering.

11. The laser light receiving device according to claim 1, wherein: the lens consists of 36 small convex lenses; each small convex lens is square and is arranged into a large square according to 6 multiplied by 6; the edge of the lens is provided with a boss, and four corners of the lens are provided with four mounting holes which are arranged on the boss inside the box body.

12. The laser light receiving device according to claim 1, wherein: the internal circuit of the laser receiving target is provided with 36 photosensitive elements which are arranged on the circuit board according to 6 multiplied by 6, and the distance between every two photosensitive elements is equal; the four corners of the circuit board are provided with through holes which are fixed on the box body by screws and copper studs.

Technical Field

The invention belongs to a laser positioning technology under a coal mine, and particularly relates to a focusing type laser target positioning method.

Background

The coal industry occupies an extremely important position in the production of China, the automation of underground roadway construction is a hot research field of the coal industry, and the automatic directional tunneling technology is one of the most critical research contents. In the directional excavation of a mine tunnel, the laser has the advantages of high directionality, high monochromaticity, energy concentration and the like, the direction of the tunnel can be accurately indicated, the construction quality and the construction process of the tunnel can be effectively improved, and the quality and the speed of tunnel construction are greatly improved.

At present, the directional tunneling mode commonly used in China is still based on the traditional point laser direction finder positioning method. The method needs to judge the direction by naked eyes of constructors. Today with the increasingly improved automation level, the technology has low positioning pointing precision and greatly reduces the efficiency of roadway construction.

Based on the above reasons, the accuracy and rapidity of the underground directional construction are technical problems to be solved urgently at present.

Disclosure of Invention

In order to improve the accuracy and rapidity of directional construction, the invention provides the receiving device capable of positioning the laser with the wavelength of 430-800 nm, and the central position of the laser can be accurately detected in real time.

The invention provides a laser receiving device for detecting the central position of laser, which has the following specific technical scheme:

the angle adjusting device includes: the device comprises a base, a support frame (two short and one long), a connecting rod, an angle adjusting rod and a threaded rod;

the ash removal device comprises: an air inlet pipe and an air outlet pipe; a housing, an ash suction device;

the laser receiving device includes: the device comprises a case, glass, a large lens consisting of 36 convex lenses, 36 photosensitive elements and an internal circuit.

The long support frame is arranged at the rear part of the base and fixed by bolts, the left side and the right side in front of the base are respectively provided with a short support frame, and the installation method is the same as that of the long support rod. A through hole is arranged at the top of the long support frame and used for installing the adjusting rod. A through hole is arranged at the top end of the short supporting rod and is connected with the bottom of the shell through an iron column. The iron column, the short supporting rod and the shell are in transition fit.

The angle adjusting rod consists of two parts: a fixing cap and an adjusting rod.

The fixing cap is axially provided with a through hole, and an inner hole is in transition fit with the outer diameter of the adjusting rod. The fixing cap is provided with a through hole in the circumferential direction and is fixed on the adjusting rod by a bolt. Adjust pole axial through hole, the through-hole has internal thread and threaded rod external screw thread fit.

The outside of the adjusting rod is provided with a ladder which is in clearance fit with the inner hole of the long supporting rod, the ladder platform is used for axially fixing the adjusting rod on one side, and the other side is axially fixed by a fixing cap. The handle is arranged at the tail end of the outer part of the adjusting rod, and the included angle between the laser receiving device and the base can be changed by rotating the handle in the circumferential direction, so that the plane of the laser receiver is perpendicular to the laser.

One end of the threaded rod is provided with a through hole and is connected with the iron column for the connecting rod, and the iron column is in transition fit with the threaded rod and the connecting rod. The threaded rod is full of external threads except for the end with the hole.

The connecting rod is used for connecting the connecting threaded rod and the shell. The connecting rod is connected with the shell through an iron column, and the iron column is in transition fit with the connecting rod and the shell.

In the angle adjusting process, the handle of the rod is rotated clockwise, the internal thread of the angle adjusting rod can push the threaded rod to move forwards, the bottom of the top end of the shell is connected and fixed with the short supporting rod, and the laser receiving device can only swing forwards. On the contrary, the rod is adjusted by rotating the angle anticlockwise, the threaded rod is pushed by the internal thread of the angle adjusting rod to move backwards, and the laser receiver swings backwards. The invention can change the angle between the laser receiving device and the base through the rotation angle adjusting rod, and can receive the laser in any direction.

The outer part of the shell of the ash removal device is connected with the short supporting rod and the threaded rod and used for angle adjustment and supporting and fixing. The inner part is provided with a boss, and the boss is provided with a threaded hole for fixing the laser receiving device. The periphery of the shell is provided with twenty-four through holes, and each side of the shell is provided with six uniform distribution holes. The front of the shell is provided with four dust suction devices for sucking away dust blown away by the air outlet pipe.

The inlet of the air inlet pipe is externally connected to the air blower, and the outlet of the air inlet pipe is connected with the air outlet pipe. Compressed air enters the air inlet pipe from the air blower and then enters the air outlet pipe from the air inlet pipe.

The air outlet pipe is arranged on the shell. The air outlet pipe is provided with an air inlet and twenty-four air outlets, and each side of the shell is provided with six air outlets. The inlet of the air outlet pipe is connected with the air inlet pipe, and the outlet of the air outlet pipe faces the glass of the receiving device.

The dust suction devices are arranged on the front surface of the shell, and are four in total and are respectively fixed on the four edges of the front surface by bolt connection. The tail part of the dust suction device is externally connected with an exhaust fan, and when more dust exists, the dust suction device can suck the dust blown by the air outlet pipe.

Due to the fact that dust is more when the laser collecting device works underground, the phenomenon that the dust blocks the receiving device or refracts the laser can occur, and the receiving device is prevented from collecting the laser. In order to prevent the phenomenon, the invention designs the dust cleaning device which can clean dust falling on the laser receiving device.

The dust cleaning device is externally connected with an air blower, compressed air is sent into the air inlet pipe from the air blower, the outlet of the air inlet pipe is connected with the air outlet pipe, and the compressed air is divided into six strands through the inner pipeline of the air outlet pipe and is discharged from the air outlet of the air outlet pipe. Six air outlets are formed in each side, and discharged compressed air generates convection on the surface of the laser receiving device to blow dust on the surface away from the laser receiving device. In order to ensure that the blown dust can not influence the laser receiving device any more, the four dust suction devices are arranged in the direction in which the dust is blown away, so that the reliability of the dust cleaning device is enhanced, and the precision and the anti-interference capability of the laser receiver in a severe environment are improved.

The laser receiving device provided by the invention has good air tightness, and the joint is sealed by the rubber pad, so that underground dust is prevented from entering, and the precision of the receiving device is reduced.

The case is composed of a top cover and a case body.

The top cover and the box body are connected through bolts to fix the glass. A rubber pad groove is reserved in the top cover and the box body, the rubber pad is used for isolating air, and glass is prevented from being crushed in the process of mounting the top cover.

The box body is externally provided with a boss, the boss is provided with a threaded hole, and the boss and the shell are fixed by bolts. A boss is arranged in the box body, and a rubber pad is arranged on the boss and used for fixing the lens. The circuit board is arranged in the box body and fixed by bolts. And punching the bottom of the box body, installing a connector, and sealing the connector and the through hole by using sealant. The connector mainly functions to transmit data signals collected by the photosensitive elements to the outside.

The lens consists of 36 small convex lenses. Each small convex lens is square and arranged into a large square according to 6 multiplied by 6. When the laser light strikes any one of the 36 small lenses, the small lens can focus the laser light on the corresponding photosensitive element, and the accuracy of the laser light receiving device is enhanced.

The optional photosensitive element can adopt a photoelectric cell or a photoelectric diode. The photocell is low in price and low in accuracy, and can be used for direct detection; the photodiode has high accuracy, needs to be amplified by matching with a transgroup amplifier, and has expensive matched devices. Under the condition of not considering the cost, a photodiode is preferred for detection, and the photodiode can detect laser with the wavelength of 430-800 nm.

The internal circuit comprises 36 photosensitive elements. When the focusing irradiation of laser through lens on certain light-sensitive element, light-sensitive element passes through photoelectric effect, changes the light energy of laser into the electric energy, and when internal circuit detected light-sensitive element's both ends voltage and took place great change, internal circuit just identified the laser and beaten on this light-sensitive element, through filtering, the rectification, enlargies, passes through the connector with the signal, transmits for outside host computer.

In summary, the present application includes at least one of the following beneficial technical effects:

the angle adjusting device can change the angle between the laser receiving device and the base and can receive laser in any direction; the dust removing device can remove dust falling on the laser receiving device, and accuracy and anti-interference capability of the laser receiver in severe environment are improved. The laser receiving device can detect the central position of the laser with the wavelength of 430-800 nm more accurately and rapidly.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the practice of the invention

The examples are given together to illustrate the invention and do not constitute a limitation of the invention.

FIG. 1 is a front view of a lens focused laser receiving target of the present invention.

FIG. 2 is a rear isometric view of a lens focused laser receiving target of the present invention.

FIG. 3 is a front isometric view of a lens focused laser receiving target of the present invention.

FIG. 4 is a side cross-sectional view of a lens focused laser receiving target of the present invention.

Fig. 5 and 6 show two extreme positions of a lens focusing type laser receiving target according to the present invention.

Fig. 7 is a cross-sectional view of an outlet tube of the present invention.

Fig. 8 is a schematic view of a lens of the invention.

Figure 9 is a top view of the base of the present invention.

Fig. 10 is a partially enlarged view of the case of the present invention.

Description of reference numerals: 1. a base; 2. a short support bar; 3. a long support bar; 4. adjusting a rod; 5. a fixing cap; 6. a threaded rod; 7. a housing; 8. a connecting rod; 9. a box body; 10. glass; 11. a rubber pad; 12. a top cover; 13. a lens; 14. an air outlet pipe; 15. a copper stud; 16. an internal circuit; 17. an upper and lower ash suction device; 18. left and right dust suction devices;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in the figure 1, the invention discloses a laser center positioning device which can position a receiving device of laser with the wavelength of 430-800 nm and can accurately detect the center position of the laser in real time.

For ease of understanding, it is specified that fig. 1 is the front, the rear view of fig. 1 is the rear, the top view of fig. 1 is the top, and the left view of fig. 1 is the left.

The present embodiment will be described in detail with reference to fig. 2, 3 and 4.

The laser receiving target angle adjusting device is composed of a base 1, a short supporting rod 2, a long supporting rod 3, an angle adjusting rod assembly (4 and 5), a threaded rod 6 and a connecting rod 8.

As shown in fig. 7, the base 1 is symmetrically provided with a groove at the front left side and the front right side for positioning and mounting two short supporting rods 2; a groove is arranged at the position behind the center line of the base 1 for positioning and installing the long supporting rod 3. The base is connected with the long and short support rods by bolts.

The short supporting rods 2 are two rods with the same size and shape and are arranged on the base in parallel. The bottom of the short supporting rod 2 is square, four through holes are arranged at four corners of the short supporting rod, the top of the short supporting rod is a u-shaped supporting seat, and the short supporting rod is connected with the shell 7 through iron columns, so that the freedom degree of the shell in moving around is limited, and the shell can only swing back and forth.

The long support rod 3 is arranged at the middle rear part of the base, and the top part of the long support rod is provided with a through hole for circumferentially fixing the angle adjusting rod assembly (4 and 5).

The angle adjusting rod assemblies (4 and 5) are composed of an adjusting rod 4 and a fixing cap 5.

The adjusting rod 4 is provided with three steps, the third step is also the step with the largest diameter, and the tail end is provided with the handle, so that the force arm of the angle adjusting rod is increased, and a worker can save more labor when adjusting the angle. The second step is used as a positioning shaft shoulder, and as shown in fig. 4, the second step shaft shoulder is contacted with the long support rod to axially fix the angle adjusting rod. The first ladder contacts with the through hole of the long support rod, and the first ladder and the through hole are in clearance fit and need to be lubricated by adding lubricating oil. The first step has a blind hole on its side for mounting the positioning fixing cap 5. The middle of the adjusting rod 4 is a threaded through hole which is meshed with the external thread of the threaded rod 6. By rotating the adjusting rod, the threaded rod can be controlled to move forwards or backwards. The reaction force is prevented from making the adjusting rod far away from the supporting rod, and the fixing cap is installed at the first step, so that the axial movement of the adjusting rod is fixed.

The connecting rod 8 is used for connecting the shell 7 and the threaded rod 6. The back and forth movement of the threaded rod can be converted into back and forth swinging of the laser receiving target.

The operation process of the angle adjusting device of the laser receiving target is as follows:

the adjusting rod 4 is rotated clockwise, the internal thread of the angle adjusting rod pushes the threaded rod 6 to move forward, and the connecting rod 8 and the shell 7 are driven to move forward. Because the bottom of the housing is secured by short support rods, the housing can only swing forward. Conversely, rotating the adjustment lever 4 counterclockwise moves the threaded rod 6 rearward, pulling the connecting rod 8 and the housing rearward, causing the housing to swing rearward.

Fig. 5 and 6 show two extreme positions of the laser receiving target, and the invention can select any angle between the two extreme positions by rotating the angle adjusting rod.

The dust cleaning device of the laser receiving target consists of a shell 7, an air inlet pipe, an air outlet pipe 14 and dust suction device kits (17 and 18).

The bottom of the back of the shell 7 is provided with a left supporting seat and a right supporting seat respectively, the left supporting seat and the right supporting seat are symmetrical along the center line, and the center positions of the left surface and the right surface of each supporting seat are provided with through holes which are connected with the short supporting rods through iron columns. The iron column is in interference fit with the shell supporting seat, and the iron column is in transition fit with the short supporting rod. The middle upper middle line of the back of the shell 7 is provided with a female support seat which is connected with the connecting rod 8 by an iron column. A through hole is arranged at the center of the left side of the female seat of the supporting seat and is in transition fit with the iron column, and the connecting rod 8 is in interference fit with the iron column.

The front surface of the shell 7 is provided with a boss, four corners of the boss are rounded, and four sides of the boss are respectively provided with two mounting holes for mounting dust suction devices (17 and 18). The two holes on each side are symmetrical along the midline.

The shell 7 is internally provided with a boss, the upper side and the lower side of the boss are wide, and the left side and the right side of the boss are narrow. The four corners of the boss are respectively provided with a hole, and the middle lines of the upper edge and the lower edge of the boss are respectively provided with a hole, and the holes are totally six holes and used for installing and fixing the chassis.

The top, the bottom, the left side and the right side of the shell 7 are respectively provided with six through holes. The centers of the six through holes on each surface are on the same straight line, the distance between every two through holes is the same, and the six through holes are symmetrical along the center.

The air inlet pipe is a common hose and is used for connecting the air blower and the air outlet pipe.

The section of the air outlet pipe 14 is shown in fig. 7, the air inlet pipe is hollow, and is provided with an air inlet and twenty-four air outlets. The inlet of the air inlet pipe is arranged on the right side, and the number of each side of the air outlet is six. The air outlets on each edge are equal in distance and symmetrical along the central line, the air outlets of the air outlet pipes are bent towards the glass of the laser receiving target, and the length of the air outlets does not exceed the inner edge line of the top cover 12.

The dust suction device external members (17, 18) are provided with two groups, two dust suction ports are arranged in each group, and four dust suction ports are positioned on four edges of the boss on the front surface of the shell 7. The upper and lower suction ports 17 are installed at the top and bottom of the front of the housing 7. The upper and lower dust suction ports 17 are the same in size and shape. The interior of the dust suction port is hollow, the tail end of the dust suction port is provided with an outlet connected with an exhaust fan, bosses are arranged on two sides of the dust suction port, and a mounting hole is formed in each boss. The central line of the upper and lower dust suction ports 17 coincides with the central line of the shell 7, and the mounting holes at the two sides correspond to the threaded holes on the edge of the shell and are fixedly connected by bolts. The mounting method and the size and the structure of the left and right dust suction ports 18 are similar to those of the upper and lower dust suction ports 17, except that bosses at two sides of the upper and lower dust suction ports 17 are positioned at the center line of the dust suction ports, and bosses at two sides of the left and right dust suction ports are positioned between the center line of the dust suction ports and the inlet of the dust suction ports.

The laser receiving device of the laser receiving target consists of a box body 9, glass 10, a rubber pad 11, a top cover 12, a lens 13, a copper stud 15 and a laser receiving target internal circuit 16.

The glass 10 is made of explosion-proof glass, the front surface of the glass is square, the periphery of the glass is fixed on the box body 15, and the thickness of the glass is consistent with the depth of a box body groove, so that the air tightness of the device is guaranteed, and the safety of the lens is also guaranteed.

The top cover 12 is mounted on the box body 15. The length and the width of the top cover are equal, and the middle of the top cover is hollowed, so that laser can conveniently penetrate through the top cover. Eight mounting holes are formed in the front face, four corners of the top cover are provided with one mounting hole, and the center of each edge is provided with one mounting hole. The back surface is provided with a square narrow groove, and a rubber pad is arranged to ensure the sealing performance of the laser receiving target.

Two rubber pads 11 are needed for each laser receiving target, and are respectively arranged on the top cover and the box body and are in the shape of a narrow square strip. The rubber pad 11 is slightly thicker than the grooves of the top cover and the box body, so as to prevent the glass from being crushed when the top cover is installed and ensure certain air tightness of the device.

The lens 13 is shown in fig. 8, and the whole lens is made of glass. The outer part of the lens 13 is provided with a boss, four corners of the boss are provided with mounting holes, and the boss is fixedly arranged on the boss in the case. The inner part of the lens is composed of thirty-six small square convex lenses with the same shape and size. The thirty-six small convex lenses are uniformly arranged according to 6 multiplied by 6, when laser lights one small convex lens, the small convex lens can focus the laser on the photosensitive element, and the measuring sensitivity of the device is enhanced.

The angle partial view of the box body 9 is shown in fig. 10, a boss is arranged on the front face of the box body, eight mounting holes are arranged on the boss, the positions of the mounting holes correspond to those of the through holes of the top cover, and the mounting holes are fixed by bolts. The top and the bottom of the outer part of the lug boss are provided with positioning holes which correspond to screw holes in the shell 7. The square groove is formed in the boss and used for fixing the explosion-proof glass and preventing the glass from sliding, and the circular grooves are formed in the four corners of the groove, so that the glass is convenient to disassemble. The bottom of the square groove is provided with another groove for installing a rubber pad. The boss in the box 9 and four corners are respectively provided with a mounting hole for fixing the lens 13, so that the lens is prevented from sliding and being damaged due to vibration of a machine during working. And four corners of the bottom inside the box body are respectively provided with a threaded hole and a non-through hole, and the threaded holes and the copper studs jack up the internal circuit board, so that the circuit board is convenient to fix and an empty space is reserved for internal connecting lines of the circuit. And punching the bottom of the box body, installing a connector, and sealing the connector and the through hole by using sealant. The connector mainly functions to transmit data signals collected by the photosensitive elements to the outside.

The receiving target internal circuit 16 has thirty-six photosensitive elements arranged on a circuit board at 6 × 6, and the photosensitive elements are equally spaced. The four corners of the circuit board are provided with through holes which are fixed on the box body by screws and copper studs. When the focusing irradiation of laser through lens on certain light-sensitive element, light-sensitive element passes through photoelectric effect, changes the light energy of laser into the electric energy, and when internal circuit detected light-sensitive element's both ends voltage and took place great change, internal circuit just identified the laser and beaten on this light-sensitive element, through filtering, the rectification, enlargies, passes through the connector with the signal, transmits for outside host computer.

The foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way that is within the spirit of the invention

Any modifications, equivalents, improvements and the like made within the scope of the present invention should be included.