A handheld optical measuring instrument

Abstract

This invention discloses a handheld optical measuring instrument, relating to the field of new material testing technology. When operating the measuring instrument, it is impossible to ensure a tight fit between the instrument probe and the sign surface, leading to the influence of ambient light on the testing results. The invention includes a body with a connecting seat fixed to it. An extension rod is detachably connected to the connecting seat, and a base is detachably connected to the extension rod. A fixed cover and mirror-distributed fixed frames are fixed to the body. A fixed frame is commonly arranged on the mirror-distributed fixed frames, and mirror-distributed fixed rods are fixed to the fixed frames. A sliding frame is slidably connected to the mirror-distributed fixed frames, and mirror-distributed connecting springs are fixed between the sliding frame and the fixed frames. This invention uses the sliding frame to actively pull the connecting springs and fixed frames, applying axial compressive force to the body during road sign testing, ensuring a tight fit between the fixed cover and the road sign, thus improving the accuracy and reliability of the testing data.

Description

Technical Field

[0001] This invention relates to the field of new material testing technology, and in particular to a handheld optical measuring instrument. Background Technology

[0002] A retroreflective sign measuring instrument is a specialized device used to evaluate the optical performance of retroreflective materials (such as traffic signs and road markings). With the increasing prevalence of road and traffic signs, ensuring their retroreflective performance meets standards has become particularly important. The retroreflective sign measuring instrument can quantify the retroreflective coefficient of new materials by measuring the intensity of retroreflected light, thereby assessing their visibility under different conditions.

[0003] When conducting on-site measurements, if the sign to be measured is installed at a high position, the operator needs to use an extension pole to lift the measuring instrument and bring it close to the sign surface before conducting the test. However, this method has a significant limitation: because the measuring instrument is far from the operator, it is difficult for the operator to apply stable and sufficient pressure, thus failing to ensure a tight fit between the instrument probe and the sign surface. If a gap exists between the probe and the surface being measured, ambient light can easily intrude into the detection optical path, interfering with the measurement signal and ultimately leading to a significant deviation in the retroreflection coefficient measurement results, affecting the accuracy and reliability of the data. Summary of the Invention

[0004] To overcome the above-mentioned drawbacks, the present invention provides a handheld optical measuring instrument.

[0005] The technical implementation of the present invention is as follows: A handheld optical measuring instrument includes a body, a connecting seat fixedly connected to the body, an extension rod detachably connected to the connecting seat, a base detachably connected to the extension rod, a fixing cover and mirror-distributed fixing frames fixedly connected to the body, a fixing frame commonly arranged on the mirror-distributed fixing frames, a fixing rod fixedly connected to the fixing frame, the fixing rod slidably connected to the body, a sliding frame commonly slidably connected to the mirror-distributed fixing frames, and a mirror-distributed connecting spring fixedly connected between the sliding frame and the fixing frame, thereby providing axial clamping force to the body by utilizing the sliding of the sliding frame and the force stored in the connecting spring.

[0006] Preferably, a fixing plate is fixedly connected to the connecting seat, a rotating rod is rotatably connected to the fixing plate, a mirror-distributed sliding rod is fixedly connected to the rotating rod, a mirror-distributed fixing pin is fixedly connected to the sliding frame, a sliding groove is provided on the sliding rod, the fixing pin slides in the corresponding sliding groove of the sliding rod, the mirror-distributed sliding rods are jointly fixedly connected to a connecting frame, and a telescopic rod is detachably connected to the connecting frame.

[0007] Preferably, the distance between the axis of the fixed pin and the axis of the rotating rod is less than the distance between the end of the telescopic rod away from the connecting frame and the axis of the rotating rod.

[0008] Preferably, a fixed shell is fixedly connected to the side of the body near the fixed cover, and a light shield is fixedly connected to the fixed shell.

[0009] Preferably, the light shield is cylindrical and made of soft rubber.

[0010] Preferably, a first fixing ring is fixedly connected between the light shield and the fixed shell, and an injection tube is fixedly connected to the first fixing ring, the injection tube being connected to the light shield.

[0011] Preferably, the light shield is provided with a light shielding groove, which is a circular groove.

[0012] Preferably, the fixed shell is fixedly connected to a fixed cylinder, the fixed cylinder is connected to the light shield, the fixed cylinder is fixedly connected to the first fixed ring, a piston rod is slidably connected inside the fixed cylinder, a second fixed ring is fixedly connected inside the fixed cylinder, and a compression spring is fixedly connected between the piston rod and the second fixed ring.

[0013] Preferably, the fixed cylinder is threadedly connected to an adjusting shell, which is used to block the piston rod.

[0014] Preferably, a first electromagnet is provided on the body, and a second electromagnet is slidably connected to the body. The first electromagnet is used to drive the second electromagnet to move. The second electromagnet is in contact with the fixed shell, and the fixed shell is made of magnetic material.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention applies axial compressive force to the machine body when detecting road signs by actively pulling the connecting spring and the fixed frame through the sliding frame, ensuring that the fixed cover fits tightly with the road sign, thereby improving the accuracy and reliability of the detection data; By setting the distance between the telescopic rod, the sliding rod and the rotating rod, the compressive force required to press the machine body onto the road sign is reduced by utilizing the lever principle, thus reducing the difficulty of using the device; The fixed shell actively provides compressive force to the light shield, making the surface of the light shield fit tightly with the road sign (even at surface defects, it can deform and fit), reducing the probability of light entering the fixed cover, thereby improving the accuracy of the detection data. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the body and the fixing frame of the present invention; Figure 3This is a three-dimensional structural diagram of the body and connecting base of the present invention; Figure 4 This is a three-dimensional structural diagram of the fixing plate and rotating rod of the present invention; Figure 5 This is a three-dimensional structural diagram of the connecting frame and telescopic rod of the present invention; Figure 6 This is a three-dimensional structural diagram of the fixing shell and the light shield of the present invention; Figure 7 This is a three-dimensional structural cross-sectional view of the fixing shell and the light shield of the present invention; Figure 8 This is a three-dimensional structural diagram of the piston rod and the second fixing ring of the present invention.

[0017] The components in the attached diagram are labeled as follows: 1: Body, 2: Connecting seat, 3: Extending rod, 4: Base, 5: Fixing cover, 6: Fixing frame, 7: Fixing frame, 8: Fixing rod, 9: Sliding frame, 10: Connecting spring, 11: Fixing plate, 12: Rotating rod, 13: Sliding rod, 14: Fixing pin, 15: Connecting frame, 16: Telescopic rod, 17: Fixing shell, 18: Light shield, 19: First fixing ring, 20: Injection tube, 21: Light shielding groove, 22: Fixing cylinder, 23: Piston rod, 24: Second fixing ring, 25: Compression spring, 26: Adjusting shell, 27: First electromagnet, 28: Second electromagnet. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 This embodiment discloses a handheld optical measuring instrument for improving the pressure between the measuring instrument and the road sign when measuring high-altitude road signs.

[0020] The specific structure and connection relationships of the measuring instrument are as follows: like Figures 1-5As shown, the device includes an organism 1. A connecting seat 2 is fixed to the lower side of the organism 1. A threaded sleeve is provided at the bottom of the connecting seat 2. An extension rod 3 is threadedly connected to the bottom of the connecting seat 2. The top of the extension rod 3 is provided with an external thread, and the bottom is provided with an internal thread. The ends of every two extension rods 3 can be connected by threads. A base 4 is threadedly connected to the bottom of the extension rod 3. A fixed cover 5 and two fixed frames 6 distributed in a front-to-back mirror configuration are fixed to the organism 1. The fixed cover 5 is an existing part. Different incident angles can be determined by replacing the fixed covers 5 with different tilt angles on the left side. A fixed frame 7 is provided on the mirror-distributed fixed frames 6. Two fixed rods 8 distributed in a front-to-back mirror configuration are fixed to the fixed frame 7. The fixed rods 8 are slidably connected to the organism 1. A sliding frame 9 is slidably connected to both fixed frames 6. Two connecting springs 10 distributed in a front-to-back mirror configuration are fixed between the sliding frame 9 and the fixed frame 7. The connecting springs 10 are tension springs. The sliding of the sliding frame 9 and the force stored in the connecting springs 10 are used to... The body 1 provides axial clamping force. A fixed plate 11 is fixedly connected to the connecting seat 2. A rotating rod 12 is rotatably connected to the right side of the fixed plate 11. Two sliding rods 13 with front-to-back mirror distribution are fixedly connected to the rotating rod 12. The rotating rod 12 and the sliding rods 13 are connected by bolts. Two fixed pins 14 with front-to-back mirror distribution are fixedly connected to the sliding frame 9. The fixed pin 14 consists of a cylinder and a disc. The sliding rod 13 is provided with a groove, and the width of the groove is equal to the diameter of the cylindrical part of the fixed pin 14. The fixed pin 14 slides in the groove of the corresponding sliding rod 13. A connecting frame 15 is fixedly connected to the lower side of the two sliding rods 13. A threaded sleeve is provided on the lower side of the connecting frame 15. The threaded sleeve on the lower side of the connecting frame 15 is connected to a telescopic rod 16 by threads. The distance between the axis of the fixed pin 14 and the axis of the rotating rod 12 is less than the distance between the lower end of the telescopic rod 16 and the axis of the rotating rod 12, thereby reducing the force required by the user to pull the telescopic rod 16 according to the lever principle.

[0021] The working process of the measuring instrument in this embodiment is as follows: Preparation process: First, determine the required lifting height of the machine body 1 based on the required height of the road sign and the user's height, and determine the number of extension rods 3 to be connected based on the required lifting height. Then, connect the required extension rods 3 end to end, and connect the extended rods 3 end to end to the lower side of the connecting seat 2. Then, connect the base 4 to the lower side of the extension rods 3, and connect the connecting frame 15 to the telescopic rod 16. The user determines the test angle, and then install the fixing cover 5 corresponding to the angle. At this time, the preparation work is completed.

[0022] Working process: After the user completes the test program settings, they hold the extension rod 3 and gradually lift the machine body 1 upwards until it reaches the test height (and the machine body 1 is located behind the road sign; the following description will use the location of the machine body 1 behind the road sign as the orientation). The user stops lifting and moves the machine body 1 and the fixed cover 5 to the front of the road sign using the extension rod 3. Then, the user presses the fixed cover 5 onto the road sign using the extension rod 3. At the same time, the user pulls the telescopic rod 16 backwards. The telescopic rod 16 drives the two sliding rods 13 to swing forward around the axis of the rotating rod 12 through the connecting frame 15. During the swing of the sliding rods 13, the sliding rods 13 drive the fixed pins 14 to move forward through their upper grooves. The two fixed pins 14 drive the sliding frame 9 to move forward. The sliding frame 9 moves forward and stretches the connecting spring 10. The connecting spring 10, through the fixed frame 7 and the two fixed rods 8, pushes the machine body and its parts forward, thereby... To ensure stable contact between the fixed cover 5 and the road sign, stop pulling the telescopic rod 16 backward and begin retroreflective testing of the road sign. After testing, the user releases the telescopic rod 16, and the connecting spring 10 drives the telescopic rod 16 to reset via the sliding frame 9, the fixing pin 14, the sliding rod 13, and the connecting frame 15. Then, repeat the above steps to test the remaining road signs until all road signs have been tested. Disassemble and store the device. After use, the sliding frame 9 actively pulls the connecting spring 10 and the fixing frame 7 to apply axial compressive force to the body 1 when testing the road sign, ensuring that the fixed cover 5 fits tightly against the road sign, thus improving the accuracy and reliability of the test data. By setting the distance between the telescopic rod 16, the sliding rod 13, and the rotating rod 12, the lever principle is used to reduce the compressive force required to press the body 1 onto the road sign, thus reducing the difficulty of using the device.

[0023] Example 2 This embodiment discloses a handheld optical measuring instrument, which is a further improvement on Embodiment 1.

[0024] The structure, connection relationship and working process of the measuring instrument in Example 1 will not be described again. The working principle of the following structure will be explained in detail. The same applies to subsequent examples.

[0025] like Figure 1 , Figure 2 and Figures 6-8 As shown, a fixed shell 17 is fixedly connected to the side of the body 1 near the fixed cover 5. The fixed shell 17 is a disc-shaped shell. A light shield 18 is fixedly connected to the fixed shell 17. The light shield 18 is made of soft rubber and is cylindrical. A first fixing ring 19 is fixedly connected between the light shield 18 and the fixed shell 17. The first fixing ring 19 is made of hard metal. A pressure injection pipe 20 connected to the first fixing ring 19 and communicating with the light shield 18 is fixedly connected. A valve is provided inside the pressure injection pipe 20. Two light shielding grooves 21 are provided on the light shield 18. The light shielding grooves 21 are annular grooves.

[0026] like Figure 1 , Figure 2 and Figures 6-8 As shown, a fixed cylinder 22 is fixedly connected to the front of the fixed shell 17. The fixed cylinder 22 is connected to the light shield 18 and the fixed cylinder 22 is fixedly connected to the first fixed ring 19. A piston rod 23 is slidably connected inside the fixed cylinder 22, and the two are dynamically sealed. A second fixed ring 24 is fixedly connected inside the fixed cylinder 22. The piston rod 23 consists of a disc and a cylinder. A compression spring 25 is fixedly connected between the piston rod 23 and the second fixed ring 24. The compression spring 25 is a spring. An adjusting shell 26 is threadedly connected to the fixed cylinder 22. The adjusting shell 26 is used to block the cylindrical part of the piston rod 23. A first electromagnet 27 is provided on the machine body 1. A second electromagnet 28 is slidably connected to the machine body 1. The first electromagnet 27 is used to drive the second electromagnet 28 to move. The first electromagnet 27 is in contact with the second electromagnet 28. The second electromagnet 28 is in contact with the fixed shell 17, and the fixed shell 17 is made of magnetic material.

[0027] The working process of the measuring instrument in this embodiment is as follows: Preparation process: Before inspecting the road sign, the user first injects gas into the sunshade 18 through the injection tube 20 until the sunshade 18 gradually expands to... Figure 7 In the indicated state, stop the air injection, then close the valve inside the injection tube 20. The user then observes whether there are surface defects (potholes, dents, etc.) on the road sign, and determines the distance between the adjusting shell 26 and the round rod part of the piston rod 23 based on the surface defects (i.e., determines the maximum compression distance of the compression spring 25). The more surface defects there are, the farther the distance between the adjusting shell 26 and the piston rod 23 will be.

[0028] Working process: In the above embodiment, after the user stops pulling the telescopic rod 16 backward, the user activates the first electromagnet 27 and the second electromagnet 28, thereby generating a repulsive force between them. The first electromagnet 27 squeezes and pushes the second electromagnet 28 forward through the repulsive force. The second electromagnet 28 pushes the fixed shell 17 forward. The fixed shell 17 drives the light shield 18 forward and contacts the road sign. The light shield 18 is deformed under pressure, so that the surface of the light shield 18 fits tightly against the road sign (the surface defects can also deform and fit), thereby ensuring a dark environment inside the fixed shell 5. The air pressure inside the light shield 18 increases, and the gas squeezes and pushes the piston rod 23 backward. The piston rod 23 moves backward and squeezes the compression spring 2. 5. Continue until the piston rod 23 contacts the inner side of the adjusting shell 26. At this point, the piston rod 23 stops moving, the air pressure inside the light shield 18 stops increasing and tends to stabilize, and the fixed shell 17 stops moving backward. Then repeat the above detection steps. After the detection is completed, the user changes the direction of the current to convert the repulsive force between the first electromagnet 27 and the second electromagnet 28 into an attractive force. The second electromagnet 28 drives the fixed shell 17 and its parts to reset through magnetic attraction. The work is completed. The fixed shell 17 actively provides a squeezing force to the light shield 18, so that the surface of the light shield 18 is tightly attached to the road sign (the surface defects can also be deformed and attached), reducing the probability of light entering the fixed shell 5 and improving the accuracy of the detection data.

[0029] During the light-blocking process of the aforementioned light shield 18, if light still enters through the gap between the light shield 18 and the road sign, the two light-blocking slots 21 gradually reduce it. Since both light-blocking slots 21 are annular, when external light enters from the gap, it will first hit the arc-shaped inner wall of the light-blocking slot 21. Because the wall is curved, the light will undergo continuous specular reflection. With each reflection, a portion of the light energy will be absorbed, and its propagation path will be effectively restricted to the vicinity of the side wall, "trapped" and consumed like a vortex. The light needs to undergo many reflections before it can reach the bottom center of the shell. During this period, its energy has already been completely attenuated, thus ensuring the light-blocking effect of the light shield 18.

[0030] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A handheld optical measuring instrument, comprising a body (1), a connecting seat (2) fixedly connected to the body (1), an extension rod (3) detachably connected to the connecting seat (2), a base (4) detachably connected to the extension rod (3), and a fixing cover (5) fixedly connected to the body (1), characterized in that, It also includes a mirror-distributed fixing frame (6), which is fixedly connected to the body (1). A fixing frame (7) is provided on the mirror-distributed fixing frame (6). A mirror-distributed fixing rod (8) is fixedly connected to the fixing frame (7). The fixing rod (8) is slidably connected to the body (1). A sliding frame (9) is slidably connected to the mirror-distributed fixing frame (6). A mirror-distributed connecting spring (10) is fixedly connected between the sliding frame (9) and the fixing frame (7). The sliding of the sliding frame (9) and the force storage of the connecting spring (10) provide axial clamping force to the body (1). A fixing plate (11) is fixedly connected to the connecting seat (2). A rotating rod (12) is rotatably connected to the fixing plate (11). A sliding rod (13) with a mirror distribution is fixedly connected to the rotating rod (12). A fixing pin (14) with a mirror distribution is fixedly connected to the sliding frame (9). A sliding groove is provided on the sliding rod (13). The fixing pin (14) slides in the corresponding sliding groove of the sliding rod (13). The sliding rods (13) with a mirror distribution are fixedly connected to a connecting frame (15). A telescopic rod (16) is detachably connected to the connecting frame (15).

2. A hand-held optical measuring instrument according to claim 1, characterized in that The distance between the axis of the fixed pin (14) and the axis of the rotating rod (12) is less than the distance between the end of the telescopic rod (16) away from the connecting frame (15) and the axis of the rotating rod (12).

3. A handheld optical measuring instrument according to claim 2, characterized in that, A fixed shell (17) is fixedly attached to one side of the body (1) near the fixed cover (5), and a light shield (18) is fixedly attached to the fixed shell (17).

4. A hand-held optical measuring instrument according to claim 3, characterised in that The light shield (18) is cylindrical and made of soft rubber.

5. A hand-held optical measuring instrument according to claim 4, characterised in that The light shield (18) and the fixed shell (17) are jointly fixedly connected by a first fixing ring (19), and the first fixing ring (19) is fixedly connected to a pressure injection tube (20), which is connected to the light shield (18).

6. A hand-held optical measuring instrument according to claim 5, characterized in that The light shield (18) is provided with a light shielding groove (21), which is a circular groove.

7. A hand-held optical measuring instrument according to claim 6, characterised in that The fixed shell (17) is fixedly connected to a fixed cylinder (22), the fixed cylinder (22) is connected to the light shield (18), the fixed cylinder (22) is fixedly connected to the first fixed ring (19), a piston rod (23) is slidably connected inside the fixed cylinder (22), a second fixed ring (24) is fixedly connected inside the fixed cylinder (22), and a compression spring (25) is fixedly connected between the piston rod (23) and the second fixed ring (24).

8. A handheld optical measuring instrument according to claim 7, characterized in that, The fixed cylinder (22) is threadedly connected to an adjusting shell (26), which is used to block the piston rod (23).

9. A handheld optical measuring instrument according to claim 8, characterized in that, The body (1) is provided with a first electromagnet (27) and a second electromagnet (28) is slidably connected to the body (1). The first electromagnet (27) is used to drive the second electromagnet (28) to move. The second electromagnet (28) is in contact with the fixed shell (17) and the fixed shell (17) is made of magnetic material.

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