A ranging device using a dead zone-free function of a femtosecond laser

Abstract

The application discloses a ranging device with a dead zone free function of a femtosecond laser, and relates to the technical field of laser ranging devices.The ranging device comprises a base, an adjusting support leg, a measuring plate assembly, a rotating disc assembly, a self-adaptive fixing assembly, a laser ranging device and a portal frame.The base is supported by the support leg.When the base is greatly tilted due to component movement, the upper pressure is converted into displacement of a sliding ring by the hydraulic oil of a supporting shell, the pressure is further transmitted to a piezoelectric ceramic by a force transmission spring, the piezoelectric ceramic generates a corresponding electric signal, the control system judges the size of the extrusion force on the adjusting support leg according to the electric signal, and thus the degree of the tilt of the base is detected.The control system inputs electric current to the electromagnetic ring according to the size of the required adjusting force, the permanent magnet ring is driven to move upward under the repulsion force, and thus the upper pressure on the supporting shell is offset, and the purpose of automatically compensating the pressure when the adjusting support leg is tilted is achieved.

Description

Technical Field

[0001] This invention relates to the field of laser ranging device technology, specifically a ranging device that utilizes the dead-zone-free function of femtosecond lasers. Background Technology

[0002] With the rapid development of precision manufacturing, aerospace, and high-end equipment testing, the demand for high-precision, non-contact distance measurement technology is becoming increasingly urgent. While traditional laser ranging technologies (such as pulsed and phase-based laser ranging) are widely used, their accuracy is limited by laser pulse width, environmental noise, and signal processing algorithms, making them particularly difficult to meet requirements in ultra-precision measurement scenarios ranging from micrometers to sub-nanometers. Femtosecond lasers, due to their ultrashort pulse characteristics, high peak power, and wide spectral coverage, offer a new approach to breaking through the current limits of ranging accuracy.

[0003] However, existing femtosecond laser ranging devices still face many technical bottlenecks. For example, when measuring the distance to an object, there is a lack of effective fixing devices. Although there are some ranging devices on the market that can be automatically fixed, there are still dead zones when performing dynamic detection. Furthermore, when the fixing device is moved or subjected to dynamic operations, it is prone to slippage and other problems. In addition, the dynamic operation of the detection mechanism can also cause the center of gravity of the ranging device's base to change, which can lead to tilting in severe cases. These problems can cause huge errors in the detection data. Summary of the Invention

[0004] The purpose of this invention is to provide a ranging device that utilizes the dead-zone-free function of femtosecond lasers to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a ranging device utilizing the dead-zone-free function of a femtosecond laser, comprising a base, several adjustable legs mounted on the bottom of the base, a measuring plate assembly slidably mounted on the base, a turntable assembly rotatably mounted on the measuring plate assembly, an adaptive fixing assembly slidably mounted on the turntable assembly, a gantry mounted on the base, a laser ranging device slidably mounted on the gantry, the measuring plate assembly engaging with the turntable assembly for transmission, and the turntable assembly engaging with the adaptive fixing assembly for transmission.

[0006] The ranging device is connected to an external control cabinet, which is used to control the entire ranging device. The laser ranging device measures distance by emitting a femtosecond laser beam and measuring the time it takes for it to reflect back from the target.

[0007] Furthermore, the adjustable support leg includes a support leg, a support rod slidably mounted on the support leg, the top of the support rod being connected to the base, a piezoelectric ceramic being installed inside the support leg, a compression ring being slidably mounted inside the support leg and fitting against the piezoelectric ceramic, a sliding ring being slidably mounted inside the support leg, a force transmission spring being installed between the sliding ring and the compression ring, and an electromagnetic ring being installed inside the support leg. The support rod sequentially passes through the piezoelectric ceramic, the compression ring, the force transmission spring, and the sliding ring. A compression chamber is provided between the support leg and the sliding ring, and the compression chamber is filled with hydraulic oil.

[0008] Furthermore, the support rod includes a support shell, the top of which is connected to the base, and the support shell is slidably connected to the support leg. The support shell is sequentially connected to a piezoelectric ceramic, a compression ring, a force transmission spring, and a sliding ring. A permanent magnet ring is provided at the bottom of the support shell. A force transmission rod is slidably installed inside the support shell. A support spring is installed between the force transmission rod and the support shell. The bottom of the force transmission rod is connected to the support leg, and the force transmission rod passes through the permanent magnet ring.

[0009] The support legs support the entire ranging device. When the side plate assembly, turntable assembly and laser ranging device on the base move, the center of gravity of the base will change, causing the entire ranging device to tilt. At this time, along with the tilt of the base, the upper pressure on the adjusting legs also changes. The greater the tilt, the greater the upper pressure on the adjusting legs. When the pressure is too high, the support shell overcomes the elasticity of the support spring and slides downward along the support leg. The bottom of the support shell squeezes the hydraulic oil in the compression chamber. After being pressurized, the hydraulic oil transmits the pressure to the sliding ring. After being pressurized, the sliding ring squeezes the force transmission spring, which then transmits the force through the compression ring to the piezoelectric ceramic. After being pressurized, the piezoelectric ceramic generates an electric charge, which is transmitted to the control system through a wire. The control system determines the magnitude of the compression force on the adjusting leg based on the strength of the electric signal. By subtracting the initial value, it calculates the magnitude of the required output adjustment force. Then, the control system inputs current to the electromagnetic ring according to the required adjustment force. After the electromagnetic ring is energized, it generates a magnetic field that repels the permanent magnet ring. After being repelled, the permanent magnet ring drives the support shell to move upward, thereby counteracting the upper pressure and restoring the support shell to its original position before displacement. The base returns to its previous leveling state, achieving the purpose of automatic pressure compensation when the adjusting leg tilts, and ensuring the dynamic balance of the ranging device during the detection process.

[0010] Furthermore, the test plate assembly includes an electric slide plate, which is slidably mounted on a base. A fixing component is mounted on the electric slide plate, and a rotary motor is mounted on the fixing component. A rotary gear is mounted on the output shaft of the rotary motor, and the rotary gear meshes with the turntable assembly for transmission.

[0011] The base is equipped with a track, and the electric slide can drive the entire turntable assembly and the self-adaptive fixing assembly to slide along the track.

[0012] After the object is fixed, the control system activates the laser rangefinder. The laser rangefinder slides along a rail at the top of the gantry and emits a femtosecond laser beam towards the object to detect the distance. During this process, the control system activates an electric sliding plate, which moves the fixed object along a track on the base to adjust its position. The control system can also activate a rotary motor, whose output shaft drives a rotating gear, which in turn drives a gear ring, which in turn drives a turntable, which in turn rotates the fixed object to adjust its angle. The combination of the electric sliding plate and the turntable allows for multi-angle adjustments to the object at different positions. Combined with the mobility of the laser rangefinder, this achieves distance measurement without blind spots. Furthermore, the suction cups prevent slippage and misalignment during object movement, increasing the stability and accuracy of the distance measurement.

[0013] Furthermore, the turntable assembly includes a turntable body, which is rotatably mounted on an electric slide plate. A gear ring is installed on the turntable body, and the gear ring meshes with a rotating gear for transmission. A groove is provided on the turntable body, and a support plate is installed on the turntable body. An adaptive fixing component is slidably installed on the support plate, and an opening and closing motor is installed on the support plate. An opening and closing gear is installed on the output shaft of the opening and closing motor, and the opening and closing gear meshes with the adaptive fixing component for transmission. The support plate is provided with a toothed groove.

[0014] Furthermore, the adaptive fixing component includes an electric lifting seat, a connector mounted on the electric lifting seat, a fixed frame rotatably mounted on the connector, a return spring installed between the fixed frame and the electric lifting seat, a fixed end rotatably mounted on the fixed frame, a self-locking rack mounted on the electric lifting seat, the self-locking rack slidably mounted on the support plate, the self-locking rack meshing with an opening and closing gear for transmission, the electric lifting seat slidably connected to the support plate, and the self-locking rack and the tooth groove engaging.

[0015] The object to be tested is placed on the turntable. The control system activates the electric lifting platform, which adjusts the height of the fixing frame to the preset height. Then, the opening and closing motor is activated. The output shaft of the opening and closing motor drives the opening and closing gear to rotate. The opening and closing gear drives the self-locking rack to slide on the support plate. The self-locking rack drives the entire adaptive fixing assembly to slide on the support plate and lock in one direction. The two sets of adaptive fixing assemblies slide and move closer together. When the fixing end approaches the object, the fixing rod drives the suction cups to squeeze the object. Several suction cups adhere to the surface of the object to prevent the object from slipping after clamping. Under the action of the squeezing reaction force on the surface of the object, the fixing rod... The object slides and contracts on the fixed block. Different object surface shapes have different reaction forces on the fixed rods. Several fixed rods adaptively contract according to the object surface shape to match different object surface shapes, thereby achieving adsorption and flexible fixation of objects with different shapes. Under the action of flexible fixation of the fixed rods, the squeezing damage to the object is reduced. The fixed end transmits part of the squeezing force to the fixed frame. When the pressure transmitted by the two fixed ends is inconsistent, the fixed frame will deflect on the connector to adapt to the shape of the object. Finally, with the cooperation of the fixed frame and the fixed end, adaptive flexible fixation and adsorption of the object are achieved.

[0016] Furthermore, the self-locking rack includes a rack body that meshes with an opening and closing gear. The rack body is mounted on an electric lifting seat and slidably mounted on a support plate. A slide rod is slidably mounted on the rack body, and a locking spring is installed between the slide rod and the rack body. A locking plate is mounted on the slide rod, and the locking plate has several ratchet teeth. An electromagnet is mounted on the rack body and is located between the slide rods. The ratchet teeth engage with the tooth grooves.

[0017] Both the cross-section of a single ratchet and the cross-section of the tooth groove are right-angled triangles. When the two rack bodies approach each other, they cause the locking plate to slide along the tooth groove. At this time, the hypotenuse of the tooth groove presses against the hypotenuse of the ratchet. After the hypotenuse of the ratchet is compressed, it causes the locking plate to retract against the spring force of the locking spring, thus allowing the ratchet to slide through the tooth groove. When the two rack bodies move away from each other, the right-angled side of the ratchet abuts against the right-angled side of the tooth groove, and the tooth groove prevents the locking plate from sliding, thus preventing the two rack bodies from moving away and achieving locking. When unlocking is required, the control system energizes the electromagnet, which generates magnetic force and attracts the locking plate. At this time, the locking plate disengages from the tooth groove, and the two racks can move freely. Ultimately, the self-locking rack has a one-way locking and unlocking function. In the one-way locking state, it can ensure that when the self-adaptive fixing component is subjected to centrifugal force, the rack bodies will not move away from each other, so that the self-adaptive fixing component will not loosen and maintain the stability of fixing the object.

[0018] Furthermore, the fixed end includes a fixed block, which is rotatably mounted on the connector. Several fixed rods are slidably mounted on the fixed block, and an adaptive spring is installed between the fixed rods and the fixed block. A suction cup is installed at one end of each fixed rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The entire ranging device is supported by support legs. When the base tilts significantly due to component movement, the support shell converts the upper pressure into the displacement of the sliding ring through hydraulic oil. The sliding ring further transmits the pressure to the piezoelectric ceramic through the force transmission spring. The piezoelectric ceramic generates a corresponding electrical signal. The control system determines the magnitude of the compressive force on the adjusting support leg based on the electrical signal, thereby detecting the degree of tilt of the base. The control system inputs current to the electromagnetic ring according to the required adjustment force, causing the permanent magnet ring to drive the support shell upward under the action of repulsive force, thereby counteracting the upper pressure it receives and restoring the support shell to its position before displacement. The base returns to its previous leveling state, achieving the purpose of automatic pressure compensation when the adjusting support leg tilts, and ensuring the dynamic balance of the ranging device during the detection process.

[0021] 2. Several suction cups on the fixed end are used to adhere to the surface of the object, preventing the object from slipping after clamping; the fixing rod adaptively retracts according to the shape of the object's surface, thereby achieving adsorption and flexible fixation of objects of different shapes and reducing squeezing damage to the object; the fixing frame generates adaptive deflection based on the reaction force transmitted from the two fixed ends to match the shape of the object. Finally, with the cooperation of the fixing frame and the fixed end, adaptive flexible fixation and adsorption of the object are achieved.

[0022] 3. With the combination of the electric skateboard and the turntable, objects can be adjusted at multiple angles from different positions. Combined with the mobility of the laser rangefinder, this achieves distance measurement without blind spots. Furthermore, the suction cup prevents slippage and misalignment during object movement, increasing the stability and accuracy of the distance measurement.

[0023] 4. By utilizing the ratchet and groove on the locking plate, the self-locking rack achieves unidirectional self-locking, ensuring that the rack bodies do not move apart when the self-adaptive fixing components are subjected to centrifugal force, thus preventing the self-adaptive fixing components from loosening and maintaining the stability of fixing the object. By energizing the electromagnet, the electromagnet attracts the locking plate, causing the locking plate to disengage from the groove, achieving the purpose of unlocking. Attached Figure Description

[0024] Figure 1 This is a perspective view of the overall distance measuring device of the present invention;

[0025] Figure 2 This is a perspective view of the test plate assembly and turntable assembly of the present invention;

[0026] Figure 3 This is a perspective view of the adaptive fixing component of the present invention;

[0027] Figure 4This is a perspective view of the electric lifting seat and self-locking rack of the present invention;

[0028] Figure 5 For the present invention Figure 4 A magnified view of a portion of region A in the middle;

[0029] Figure 6 This is a perspective view of the fixed end of the present invention;

[0030] Figure 7 This is a perspective view of the adjustable support leg of the present invention;

[0031] Figure 8 This is a perspective view of the support rod of the present invention.

[0032] In the diagram: 1. Base; 2. Adjustable support leg; 3. Measuring plate assembly; 4. Turntable assembly; 5. Adaptive fixing assembly; 6. Laser rangefinder; 7. Gantry frame; 31. Electric sliding plate; 32. Fixing component; 33. Rotary motor; 34. Rotary gear; 41. Turntable body; 42. Gear ring; 43. Support plate; 44. Opening and closing motor; 45. Slide groove; 46. Opening and closing gear; 51. Electric lifting seat; 52. Fixing frame; 53. Return spring; 54. Fixing end; 55. Self-locking rack; 56. Connecting component; 551. Rack body; 552. Locking plate; 553. Slide rod; 554. Locking spring; 555. Electromagnet; 541. Fixing block; 542. Adaptive spring; 543. Fixing rod; 544. Suction cup; 21. Support rod; 22. Support leg; 23. Electromagnetic ring; 24. Sliding ring; 25. Force transmission spring; 26. Extrusion ring; 27. Piezoelectric ceramic; 28. Extrusion chamber; 211. Support shell; 212. Force transmission rod; 213. Support spring; 214. Permanent magnet ring; 411. Tooth groove. Detailed Implementation

[0033] 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.

[0034] like Figures 1-8As shown, this invention provides a ranging device solution utilizing the dead-zone-free function of femtosecond lasers: It includes a base 1, with several adjustable legs 2 mounted at the bottom of the base 1. A measuring plate assembly 3 is slidably mounted on the base 1, a turntable assembly 4 is rotatably mounted on the measuring plate assembly 3, and an adaptive fixing assembly 5 is slidably mounted on the turntable assembly 4. A gantry frame 7 is mounted on the base 1, and a laser ranging device 6 is slidably mounted on the gantry frame 7. The measuring plate assembly 3 and the turntable assembly 4 are engaged in transmission, and the turntable assembly 4 and the adaptive fixing assembly 5 are engaged in transmission. A control cabinet is externally connected to the ranging device, used to control the entire ranging device. The laser ranging device 6 measures distance by emitting a femtosecond laser beam and measuring the time it takes for it to reflect back from the target.

[0035] The test plate assembly 3 includes an electric slide plate 31, which is slidably mounted on the base 1. A fixing member 32 is mounted on the electric slide plate 31, and a rotary motor 33 is mounted on the fixing member 32. A rotary gear 34 is mounted on the output shaft of the rotary motor 33, and the rotary gear 34 meshes with the turntable assembly 4 for transmission.

[0036] The base 1 is equipped with a track, and the electric slide plate 31 can drive the entire turntable assembly 4 and the self-adaptive fixing assembly 5 to slide along the track.

[0037] The turntable assembly 4 includes a turntable body 41, which is rotatably mounted on an electric slide plate 31. A gear ring 42 is mounted on the turntable body 41, and the gear ring 42 meshes with a rotating gear 34 for transmission. A groove 45 is provided on the turntable body 41. A support plate 43 is mounted on the turntable body 41. An adaptive fixing component 5 is slidably mounted on the support plate 43. An opening and closing motor 44 is mounted on the support plate 43. An opening and closing gear 46 is mounted on the output shaft of the opening and closing motor 44, and the opening and closing gear 46 meshes with the adaptive fixing component 5 for transmission. A toothed groove 411 is provided on the support plate 43.

[0038] The adaptive fixing component 5 includes an electric lifting seat 51, a connector 56 mounted on the electric lifting seat 51, a fixing frame 52 rotatably mounted on the connector 56, a return spring 53 installed between the fixing frame 52 and the electric lifting seat 51, a fixing end 54 rotatably mounted on the fixing frame 52, a self-locking rack 55 mounted on the electric lifting seat 51, the self-locking rack 55 slidably mounted on the support plate 43, the self-locking rack 55 meshes with the opening and closing gear 46 for transmission, the electric lifting seat 51 is slidably connected to the support plate 43, and the self-locking rack 55 and the tooth groove 411 are engaged.

[0039] The self-locking rack 55 includes a rack body 551, which meshes with a gear 46 for transmission. The rack body 551 is mounted on an electric lifting seat 51 and slidably mounted on a support plate 43. A slide rod 553 is slidably mounted on the rack body 551. A locking spring 554 is installed between the slide rod 553 and the rack body 551. A locking plate 552 is mounted on the slide rod 553 and has several ratchet teeth. An electromagnet 555 is mounted on the rack body 551 and is located between the slide rods 553. The ratchet teeth engage with the tooth grooves 411.

[0040] Both the cross-section of a single ratchet and the cross-section of the groove 411 are right-angled triangles. When the two rack bodies 551 approach each other, they cause the locking plate 552 to slide along the groove 411. At this time, the hypotenuse of the groove 411 presses against the hypotenuse of the ratchet. After the hypotenuse of the ratchet is pressed, it causes the locking plate 552 to retract against the elastic force of the locking spring 554, thereby allowing the ratchet to slide past the groove 411. When the two rack bodies 551 move away from each other, the right-angled side of the ratchet abuts against the right-angled side of the groove 411, and the groove 411 prevents the locking plate 552 from sliding, thus preventing the two rack bodies 551 from moving away and achieving locking. When unlocking is required, the control system energizes the electromagnet 555, which generates magnetic force and attracts the locking plate 552. At this time, the locking plate 552 disengages from the groove 411, and the two racks can move freely. Ultimately, this gives the self-locking rack 55 the function of one-way locking and unlocking. In the one-way locking state, it can ensure that when the adaptive fixing component 5 is subjected to centrifugal force, the rack body 551 will not move away from each other, so that the adaptive fixing component 5 will not loosen and maintain the stability of fixing the object.

[0041] The fixed end 54 includes a fixed block 541, which is rotatably mounted on the connector 56. Several fixed rods 543 are slidably mounted on the fixed block 541. An adaptive spring 542 is installed between the fixed rods 543 and the fixed block 541. A suction cup 544 is installed at one end of the fixed rod 543.

[0042] The adjustable support leg 2 includes a support leg 22, on which a support rod 21 is slidably mounted. The top end of the support rod 21 is connected to the base 1. A piezoelectric ceramic 27 is installed inside the support leg 22. A compression ring 26 is slidably mounted inside the support leg 22 and fits against the piezoelectric ceramic 27. A sliding ring 24 is slidably mounted inside the support leg 22. A force transmission spring 25 is installed between the sliding ring 24 and the compression ring 26. An electromagnetic ring 23 is installed inside the support leg 22. The support rod 21 passes through the piezoelectric ceramic 27, the compression ring 26, the force transmission spring 25, and the sliding ring 24 in sequence. A compression chamber 28 is provided between the support leg 22 and the sliding ring 24. The compression chamber 28 is filled with hydraulic oil.

[0043] The support rod 21 includes a support housing 211. The top of the support housing 211 is connected to the base 1. The support housing 211 is slidably connected to the support leg 22. The support housing 211 passes through a piezoelectric ceramic 27, a compression ring 26, a force transmission spring 25, and a sliding ring 24 in sequence. A permanent magnet ring 214 is provided at the bottom of the support housing 211. A force transmission rod 212 is slidably installed inside the support housing 211. A support spring 213 is installed between the force transmission rod 212 and the support housing 211. The bottom of the force transmission rod 212 is connected to the support leg 22. The force transmission rod 212 passes through the permanent magnet ring 214.

[0044] The working principle of this invention is as follows: The object to be tested is placed on the turntable body 41. The control system activates the electric lifting seat 51, which adjusts the height of the fixing frame 52 to the preset height. Then, the opening and closing motor 44 is activated. The output shaft of the opening and closing motor 44 drives the opening and closing gear 46 to rotate. The opening and closing gear 46 drives the self-locking rack 55 to slide on the support plate 43. The self-locking rack 55 drives the entire adaptive fixing assembly 5 to slide on the support plate 43 and lock in one direction. The two sets of adaptive fixing assemblies 5 slide and move closer together. When the fixing end 54 approaches the object, the fixing rod 543 drives the suction cup 544 to squeeze the object. Several suction cups 544 adsorb onto the surface of the object to prevent the object from slipping after clamping. The fixing rod 543 is on the object. Under the action of surface extrusion reaction force, the object slides and contracts on the fixed block 541. Different object surface shapes have different reaction forces on the fixed rods 543. Several fixed rods 543 adaptively contract according to the object surface shape to match different object surface shapes, thereby achieving adsorption and flexible fixation of objects with different shapes. Under the flexible fixation of the fixed rods 543, the extrusion damage to the object is reduced. The fixed end 54 transmits part of the extrusion force to the fixed frame 52. When the pressure transmitted by the two fixed ends 54 is inconsistent, the fixed frame 52 will deflect on the connector 56 to adapt to the shape of the object. Finally, with the cooperation of the fixed frame 52 and the fixed end 54, the adaptive flexible fixation and adsorption of the object are achieved.

[0045] After the object is fixed, the control system activates the laser rangefinder 6. The laser rangefinder 6 slides along the slide rail at the top of the gantry 7 and emits a femtosecond laser beam towards the object to detect the distance. During this process, the control system activates the electric slide plate 31, which drives the fixed object to slide along the track on the base 1 to adjust the object's position. The control system can also activate the rotary motor 33, whose output shaft drives the rotary gear 34 to rotate. The rotary gear 34 drives the gear ring 42 to rotate, which in turn drives the turntable body 41 to rotate. The turntable body 41 then rotates the fixed object to adjust its angle. With the cooperation of the electric slide plate 31 and the turntable body 41, the object can be adjusted at multiple angles in different positions. Combined with the mobility of the laser rangefinder 6, the purpose of distance measurement without blind spots is achieved. Furthermore, under the suction force of the suction cup 544, there will be no slippage or misalignment during the movement of the object, increasing the stability and accuracy of the distance measurement.

[0046] Support leg 22 supports the entire ranging device. When the side plate assembly, turntable assembly 4, and laser ranging device 6 on the base 1 move, the center of gravity of the base 1 changes, causing the entire ranging device to tilt. At this time, along with the tilt of the base 1, the upper pressure on the adjusting leg 2 also changes; the greater the tilt, the greater the upper pressure on the adjusting leg 2. When the pressure is too high, the support shell 211 overcomes the elasticity of the support spring 213 and slides downwards along the support leg 22. The bottom end of the support shell 211 squeezes the hydraulic oil in the compression chamber 28. After being pressurized, the hydraulic oil transmits the pressure to the sliding ring 24. After being pressed, the sliding ring 24 squeezes the force transmission spring 25. The force transmission spring 25 then transmits the force through the compression ring 26 to the piezoelectric ceramic 27. After being pressed, the piezoelectric ceramic 27 generates an electric charge, which is transmitted to the control system through a wire. The control system determines the magnitude of the squeezing force on the adjusting leg 2 based on the strength of the electric signal. The required output adjustment force is calculated by subtracting from the initial value. Then, the control system inputs current to the electromagnetic ring 23 according to the required adjustment force. After the electromagnetic ring 23 is energized, it generates a magnetic field that repels the permanent magnet ring 214. After the permanent magnet ring 214 is subjected to the repulsive force, it drives the support shell 211 to move upward, thereby offsetting the upper pressure it receives and restoring the support shell 211 to its position before displacement. The base 1 returns to its previous leveling state, realizing the purpose of automatic pressure compensation when the adjusting leg 2 tilts, and ensuring the dynamic balance of the ranging device during the detection process.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A ranging device utilizing the dead-zone-free function of femtosecond laser, characterized in that: The ranging device includes a base (1), a plurality of adjustable legs (2) are installed at the bottom of the base (1), a measuring plate assembly (3) is slidably installed on the base (1), a turntable assembly (4) is rotatably installed on the measuring plate assembly (3), an adaptive fixing assembly (5) is slidably installed on the turntable assembly (4), a gantry frame (7) is installed on the base (1), a laser ranging device (6) is slidably installed on the gantry frame (7), the measuring plate assembly (3) and the turntable assembly (4) are engaged in transmission, and the turntable assembly (4) and the adaptive fixing assembly (5) are engaged in transmission. The measuring plate assembly (3) includes an electric sliding plate (31), which is slidably mounted on the base (1). A fixing part (32) is installed on the electric sliding plate (31), and a rotary motor (33) is installed on the fixing part (32). A rotary gear (34) is installed on the output shaft of the rotary motor (33), and the rotary gear (34) meshes with the turntable assembly (4) for transmission. The turntable assembly (4) includes a turntable body (41), which is rotatably mounted on an electric slide plate (31). A gear ring (42) is mounted on the turntable body (41), and the gear ring (42) meshes with a rotating gear (34) for transmission. A slide groove (45) is provided on the turntable body (41). A support plate (43) is mounted on the turntable body (41). An adaptive fixing component (5) is slidably mounted on the support plate (43). An opening and closing motor (44) is mounted on the support plate (43). An opening and closing gear (46) is mounted on the output shaft of the opening and closing motor (44), and the opening and closing gear (46) meshes with the adaptive fixing component (5) for transmission. A toothed groove (411) is provided on the support plate (43). The adaptive fixing component (5) includes an electric lifting seat (51), a connector (56) is installed on the electric lifting seat (51), a fixing frame (52) is rotatably installed on the connector (56), a return spring (53) is installed between the fixing frame (52) and the electric lifting seat (51), a fixing end (54) is rotatably installed on the fixing frame (52), a self-locking rack (55) is installed on the electric lifting seat (51), the self-locking rack (55) is slidably installed on the support plate (43), the self-locking rack (55) meshes with the opening and closing gear (46), the electric lifting seat (51) is slidably connected to the support plate (43), and the self-locking rack (55) and the tooth groove (411) are engaged. The self-locking rack (55) includes a rack body (551), which meshes with a gear (46) for transmission. The rack body (551) is mounted on an electric lifting seat (51) and slidably mounted on a support plate (43). A slide rod (553) is slidably mounted on the rack body (551). A locking spring (554) is installed between the slide rod (553) and the rack body (551). A locking plate (552) is mounted on the slide rod (553). The locking plate (552) has several ratchet teeth. An electromagnet (555) is mounted on the rack body (551). The electromagnet (555) is located between the slide rods (553). The ratchet teeth engage with the tooth groove (411). The fixed end (54) includes a fixed block (541), which is rotatably mounted on the connector (56). Several fixed rods (543) are slidably mounted on the fixed block (541). An adaptive spring (542) is installed between the fixed rod (543) and the fixed block (541). A suction cup (544) is installed at one end of the fixed rod (543).

2. The ranging device utilizing the dead-zone-free function of femtosecond laser according to claim 1, characterized in that: The adjustable support leg (2) includes a support leg (22), on which a support rod (21) is slidably mounted. The top end of the support rod (21) is connected to the base (1). A piezoelectric ceramic (27) is installed inside the support leg (22). A compression ring (26) is slidably mounted inside the support leg (22). The compression ring (26) is in contact with the piezoelectric ceramic (27). A sliding ring (24) is slidably mounted inside the support leg (22). A force transmission spring (25) is installed between the sliding ring (24) and the compression ring (26). An electromagnetic ring (23) is installed inside the support leg (22). The support rod (21) passes through the piezoelectric ceramic (27), the compression ring (26), the force transmission spring (25), and the sliding ring (24) in sequence. A compression chamber (28) is provided between the support leg (22) and the sliding ring (24). The compression chamber (28) is filled with hydraulic oil.

3. A ranging device utilizing the dead-zone-free function of femtosecond laser according to claim 2, characterized in that: The support rod (21) includes a support shell (211), the top of which is connected to the base (1), and the support shell (211) is slidably connected to the support leg (22). The support shell (211) passes through the piezoelectric ceramic (27), the extrusion ring (26), the force transmission spring (25), and the sliding ring (24) in sequence. The bottom of the support shell (211) is provided with a permanent magnet ring (214). A force transmission rod (212) is slidably installed inside the support shell (211). A support spring (213) is installed between the force transmission rod (212) and the support shell (211). The bottom of the force transmission rod (212) is connected to the support leg (22), and the force transmission rod (212) passes through the permanent magnet ring (214).

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