Device and method for testing and calibrating turntable of instrument and apparatus

Abstract

The invention relates to the technical field of instrument measurement, in particular to a turntable test calibration device and method for instruments and meters, the calibration device comprises an instrument panel, a rotating central shaft penetrates through the middle of the instrument panel, a pointer is vertically fixed at one end of the central shaft, and the tip of the pointer displays measured values by pointing to a scale piece arranged on the front side of the instrument panel. The two ends of the scale piece make contact with a calibrated lifting and supporting piece together, the side, back to the scale piece, of the lifting and supporting piece makes contact with a gear piece for measuring gear shifting, a protection plate is fixed to the front face of the instrument panel to support the lifting and supporting piece and the gear piece, and a kinetic energy device is arranged on the back face of the instrument panel. According to the invention, the scale piece is used for replacing the traditional fixed value scale line, the sensitivity of the physical quantity measurement sensor is reduced, the swing amplitude of the pointer is too large or too small, and the length of the scale line on the scale piece can be correspondingly adjusted, so that the value of the scale line pointed by the pointer is still correct even if the swing amplitude of the pointer has a problem.

Description

Technical Field

[0001] The invention relates to the technical field of instrument measurement, in particular to a turntable test and calibration device for an instrument and a method thereof. Background Art

[0002] Instruments and meters are devices used to check, measure, observe and calculate various physical quantities, material components and physical parameters. In daily life, instruments and meters can intuitively view the changes in various numerical values, and can improve, expand or supplement human functions. People use their sensory organs to see, hear, taste and touch external things, and instruments and meters such as microscopes, telescopes, sound level meters, acidity meters, pyrometers, vacuum centrifuge concentrators, etc. can improve and expand these human functions; in addition, some instruments and meters such as magnetometers and x-ray counters can sense and measure physical quantities that human sensory organs cannot sense, and some instruments and meters can record, calculate and count beyond human capabilities.

[0003] In the prior art, a turntable instrument is provided with scale lines on the turntable, and a physical quantity sensor drives a pointer after detection. The value pointed to by the pointer after swinging is the measurement value of the physical quantity. As the working measurement time increases, the sensitivity of the sensor decreases, the swing angle of the pointer naturally decreases, the scale value pointed to is low, and the measurement result is different from the actual physical quantity value. If the set scale lines are uniformly reduced as a whole, then they just correspond to the pointer with a reduced swing amplitude, and the scale line value pointed to by the pointer is still correct. Based on the concept that the scale lines can be adjusted, the present invention provides a turntable test and calibration device and method for an instrument. Summary of the invention

[0004] The object of the present invention is to provide a turntable test and calibration device for instruments and meters and a method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a turntable test and calibration device for instruments and meters, comprising an instrument panel, a rotating central axis passing through the middle of the instrument panel, a pointer being vertically fixed at one end of the central axis, the tip of the pointer displaying the measurement value by pointing to a scale member arranged on the front of the instrument panel, both ends of the scale member jointly contacting a calibrated lifting member, and a side of the lifting member facing away from the scale member contacting a shift member for measuring gear shifting, the front of the instrument panel being supported by a protective plate fixed thereon, the protective plate comprising a panel and a horizontal column vertically fixed on the panel, a kinetic energy device being arranged on the back of the instrument panel, transmission being established between the kinetic energy device and the central axis by arranging a large disc wheel, and transmission being established between the kinetic energy device and the lifting member by arranging an axis integration.

[0006] The scale member includes a positioning scale block fixed on the instrument panel, movable scale blocks arranged in an arc shape on both sides of the positioning scale block, a C-shaped slide rod connecting the positioning scale block and the movable scale block, and an arc spring supporting between two adjacent movable scale blocks or between the positioning scale block and the movable scale block. The arc spring is sleeved on the C-shaped slide rod, the C-shaped slide rod slides through the arc column hole opened on the movable scale block, and the C-shaped slide rod and the positioning scale block are fixedly connected. The front of the instrument panel also displays the distance between two adjacent movable scale blocks by arranging a C-shaped column with scales, and supporting rods are fixed on the movable scale blocks at both ends of the scale member.

[0007] The lifting and supporting member includes a transverse folding column, a concave folding plate supported at both ends of the transverse folding column, a cam in contact with the concave folding plate below, a camshaft vertically fixed on the cam, and a follower shaft vertically fixed at one end of the camshaft. The cam includes a disc body and a protrusion set on the edge of one end of the disc body. The support rod and the cam cooperate to clamp the concave folding plate. The transverse folding column is slid through the square hole opened on the transverse column of the protective plate by setting a vertical column. The end of the concave folding plate slides through the square hole opened on the transverse folding column. The end of the camshaft is connected by meshing transmission with a fixed bevel gear and a bevel gear fixed at one end of the follower shaft. The camshaft and the follower shaft are supported by a T-shaped frame set on the transverse folding column.

[0008] The shifting member includes an adjusting shaft, a round handle fixed at one end of the adjusting shaft, a pressure plate fixed at the other end of the adjusting shaft, and a plurality of door-shaped columns fixed on the pressure plate, one of which contacts the middle of the supporting transverse folding column, and the adjusting shaft is movably sleeved in a through hole opened on the protective plate panel.

[0009] The shaft assembly includes a shaft frame, and a split shaft, a neck shaft, a side shaft and a vertical shaft supported on the shaft frame. A neck shaft is vertically transmitted in the middle of the split shaft, and side shafts are vertically transmitted at both ends of the split shaft. One end of the side shaft is vertically transmitted to the vertical shaft, and transmission is established between the neck shaft, the split shaft, the side shaft and the vertical shaft by arranging bevel gears. The neck shaft is connected to the kinetic energy device by transmission, and the vertical shaft is connected to the meshing transmission by a fixed long cylinder gear and a gear fixed on the follower shaft.

[0010] The kinetic energy device includes an integrated frame fixed on the instrument panel, a collecting part that contacts and drives the large disc wheel, a spring part that drives the neck shaft, and a direction part that establishes transmission between the spring part and the collecting part. The large disc wheel is fixedly sleeved on the central axis.

[0011] The collecting part includes a guiding square tube fixed on the integrated frame, a column rack sliding through the guiding square tube, and a return spring piece elastically supporting one end of the column rack, one end of the return spring piece is fixed on the guiding square tube, and the outer edge side wall of the large disc wheel contacts the other end of the column rack by setting a wavy surface.

[0012] The direction part includes a relay shaft, a worm and a brake shaft supported on an integrated frame, and a one-way bearing with a fixed sleeve at one end of the brake shaft, and also includes a ring plate gear with a fixed sleeve on the one-way bearing. The other end of the brake shaft is connected by a fixed gear and a row of teeth arranged on a column rack through meshing transmission, one end of the worm is connected by a meshing transmission connection with a fixed gear and a ring plate gear, and one end of the relay shaft is connected by a meshing transmission connection with the helical teeth of the fixed gear and the worm.

[0013] The spring part includes a focusing shaft supported on an integrated frame, a spring with an external fixed sleeve of the focusing shaft, an outer gear ring of the external fixed sleeve of the spring, a support plate fixed on one side of the outer gear ring, a side arc plate fixed on the other side of the outer gear ring, and a retained spring piece that elastically intercepts the side arc plate, one end of the retained spring piece is fixed on the integrated frame, the focusing shaft is movably sleeved in a through hole opened in the middle of the support plate, one end of the focusing shaft is meshed and transmitted with a fixed bevel gear and a fixed bevel gear on the relay shaft, and the neck shaft is meshed and transmitted with a fixed gear and an outer gear ring.

[0014] A turntable test and calibration method for an instrument comprises the following steps:

[0015] Step 1: The corresponding scale adjustment under a single gear is achieved by changing the extension length of the door column on the pressure plate. Loosen the reinforcing screws between the door column and the pressure plate, adjust the extension of the door column on the pressure plate, and then tighten the screws to re-fix the door column and the pressure plate;

[0016] Step 2: Rotate the round handle to rotate the entire shifting member, control the adjusted door-shaped column to support the horizontal folding column again, change the distance between two adjacent active scale blocks, and the physical quantity sensor drives the central axis to swing the pointer. The scale pointed by the tip of the pointer is the physical quantity measurement value. If the value pointed by the pointer after the swing is larger than the actual measurement value, it is necessary to adjust the distance between the two active scale blocks to increase, and if it is smaller, shorten the distance between the active scale blocks to change the length of the arc scale line;

[0017] Step 3: Multiple door-shaped columns in the shift piece correspond to multiple gears. After replacing the physical quantity sensor that drives the central axis to rotate, the physical quantities of different properties can be measured by quickly rotating the shift piece to control the new door-shaped column to support the transverse folding column, so as to quickly and conveniently change the spacing between adjacent movable scale blocks and change the length of the arc scale line.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention replaces the traditional fixed numerical scale lines with a scale piece. If the sensitivity of the physical quantity measurement sensor is reduced, causing the swing amplitude of the pointer to be too large or too small, the length of the scale line on the scale piece can be adjusted accordingly. In this way, even if there is a problem with the swing amplitude of the pointer, the numerical value of the scale line pointed by the pointer is still correct.

[0020] 2. The present invention uses continuous vibration of the support rod to impact and stimulate the scale member, so that the elastic deformation of all arc springs is the same, and all movable scale blocks can be evenly distributed, so that the scale lines formed are uniform in specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the large disc wheel structure.

[0023] Figure 3 This is a schematic diagram of the location of the kinetic energy device.

[0024] Figure 4 It is a schematic diagram of the scale structure.

[0025] Figure 5 for Figure 4 Schematic diagram of the structure at point A in the middle.

[0026] Figure 6 It is a schematic diagram of the gear shifting structure.

[0027] Figure 7 Schematic diagram of the transverse column structure.

[0028] Figure 8 Schematic diagram of the shaft integration structure.

[0029] Fig. 9 Schematic diagram of the kinetic energy device structure.

[0030] Fig.10 This is a schematic diagram of the collection unit structure.

[0031] Fig.11 Schematic diagram of the column rack position.

[0032] Fig.12 It is a schematic diagram of the direction part structure.

[0033] Fig.13 This is a schematic diagram of the clockwork structure.

[0034] In the figure: instrument panel 1, central axis 2, pointer 3, scale member 4, lifting support member 5, gear member 6, protective plate 7, kinetic energy device 8, large disc wheel 9, shaft integration 10, positioning scale block 11, movable scale block 12, C-type slide bar 13, arc spring 14, C-type column 15, support rod 16, concave folding plate 17, cam 18, camshaft 19, transverse folding column 20, follower shaft 21, door column 22, pressure plate 23, adjustment shaft 24, Round handle 25, branch shaft 26, neck shaft 27, shaft frame 28, side shaft 29, vertical shaft 30, spring part 31, integrated frame 32, direction part 33, collecting part 34, column rack 35, guide square tube 36, return spring 37, relay shaft 38, worm 39, ring plate gear 40, one-way bearing 41, brake shaft 42, support plate 43, focusing shaft 44, spring 45, outer gear ring 46, retained spring 47, side arc plate 48. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the technical solutions in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 13 The present invention provides a technical solution: a turntable test and calibration device for instruments and meters, comprising an instrument panel 1, a rotating central axis 2 passing through the middle of the instrument panel 1, a pointer 3 being vertically fixed at one end of the central axis 2, the tip of the pointer 3 displays the measured value by pointing to a scale member 4 arranged on the front of the instrument panel 1, both ends of the scale member 4 are in contact with a calibrated lifting member 5, and the side of the lifting member 5 facing away from the scale member 4 is in contact with a shift member 6 for measuring gear shifting, the front of the instrument panel 1 is supported by a protective plate 7 fixed thereto, the protective plate 7 includes a panel and a horizontal column vertically fixed on the panel, a kinetic energy device 8 is arranged on the back of the instrument panel 1, a transmission is established between the kinetic energy device 8 and the central axis 2 by arranging a large disc wheel 9, and a transmission is established between the kinetic energy device 8 and the lifting member 5 by arranging a shaft integration 10.

[0037] refer to Figure 4It is understood that the scale member 4 includes a positioning scale block 11 fixed on the instrument panel 1, movable scale blocks 12 arranged in an arc shape on both sides of the positioning scale block 11, a C-shaped slide bar 13 connecting the positioning scale block 11 and the movable scale block 12, and an arc spring 14 supporting between two adjacent movable scale blocks 12 or between the positioning scale block 11 and the movable scale block 12. The arc spring 14 is sleeved on the C-shaped slide bar 13, and the C-shaped slide bar 13 slides through the arc column hole opened on the movable scale block 12, and the C-shaped slide bar 13 and the positioning scale block 11 are fixedly connected. The front of the instrument panel 1 also displays the distance between two adjacent movable scale blocks 12 by setting a C-shaped column 15 with a scale, and support rods 16 are fixed on the movable scale blocks 12 at both ends of the scale member 4.

[0038] refer to Figure 5 It is understood that the lifting member 5 includes a transverse folding column 20, a concave folding plate 17 supported at both ends of the transverse folding column 20, a cam 18 in contact with the concave folding plate 17 below, a camshaft 19 vertically fixed on the cam 18, and a follower shaft 21 vertically fixed at one end of the camshaft 19. The cam 18 includes a disc body and a protrusion set on the edge of one end of the disc body. The support rod 16 and the cam 18 cooperate to clamp the concave folding plate 17. The transverse folding column 20 is slid through the square hole opened on the transverse column of the protective plate 7 by setting a vertical column. The end of the concave folding plate 17 slides through the square hole opened on the transverse folding column 20. The end of the camshaft 19 is connected by a fixed bevel gear and a bevel gear fixed at one end of the follower shaft 21 through meshing transmission. The transverse folding column 20 is supported by a T-shaped frame.

[0039] refer to Figure 6 It is understood that the shifting member 6 includes an adjusting shaft 24, a round handle 25 fixed at one end of the adjusting shaft 24, a pressure plate 23 fixed at the other end of the adjusting shaft 24, and a plurality of ring-arranged door-shaped columns 22 fixed on the pressure plate 23, and one of the door-shaped columns 22 contacts the middle part of the supporting transverse folding column 20, and the adjusting shaft 24 is movably sleeved in a through hole opened on the panel of the protective plate 7, and the outermost end of each door-shaped column 22 is at a different distance from the pressure plate 23, so that the adjusting shaft 24 is driven by rotating the round handle 25, and then the door-shaped column 22 is driven to move around by rotating the pressure plate 23, and when different door-shaped columns 22 support the transverse folding column 20, the transverse folding column 20 is lifted to different heights, The end of the transverse folding column 20 supports the camshaft 19, which in turn lifts the concave folding plate 17 through the cam 18. The lifting and lowering of the concave folding plate 17 will cause the support rod 16 to rise and fall synchronously. The transverse folding column 20 and the support rod 16 rise and fall synchronously. The rise of the support rod 16 causes all the movable scale blocks 12 to move closer, and the distance between two adjacent movable scale blocks 12 decreases. Conversely, the transverse folding column 20 descends, causing the distance between adjacent movable scale blocks 12 to increase. Scales are set on the positioning scale block 11 and the movable scale block 12. The scales on the positioning scale block 11 and the movable scale block 12 cooperate to form an arc scale line. The length of the arc scale line changes accordingly with the change of the distance between adjacent movable scale blocks 12.

[0040] refer to Figure 8 It is understood that the shaft assembly 10 includes a shaft frame 28, and a sub-shaft 26, a neck shaft 27, a side shaft 29 and a vertical shaft 30 supported on the shaft frame 28, a neck shaft 27 is vertically transmitted in the middle of the sub-shaft 26, and side shafts 29 are vertically transmitted at both ends of the sub-shaft 26, one end of the side shaft 29 is vertically transmitted with the vertical shaft 30, and transmission is established between the neck shaft 27, the sub-shaft 26, the side shaft 29 and the vertical shaft 30 by setting bevel gears, the neck shaft 27 is connected to the kinetic energy device 8 by transmission, and the vertical shaft 30 is connected to the fixed long cylinder gear by meshing with the gear fixed on the follower shaft 21. Figure 8 The branch shaft 26, the neck shaft 27, the side shaft 29 and the vertical shaft 30 are respectively movably sleeved in different through holes opened on the shaft frame 28.

[0041] refer to Fig. 9 It is understood that the kinetic energy device 8 includes an integrated frame 32 fixed on the instrument panel 1, a collecting part 34 that is in contact with the large disc wheel 9 for transmission, a spring part 31 that is transmitted to the neck shaft 27, and a direction part 33 that establishes transmission between the spring part 31 and the collecting part 34, and the large disc wheel 9 is fixedly mounted on the central shaft 2.

[0042] The collecting part 34 includes a guiding square tube 36 fixed on the integrated frame 32, a column rack 35 that slides through the guiding square tube 36, and a return spring piece 37 that elastically supports one end of the column rack 35. One end of the return spring piece 37 is fixed on the guiding square tube 36, and the outer edge side wall of the large disc wheel 9 is in contact with the other end of the column rack 35 by setting a wavy surface.

[0043] The direction portion 33 includes a relay shaft 38, a worm 39 and a brake shaft 42 supported on the integrated frame 32, and a one-way bearing 41 with a fixed sleeve at one end of the brake shaft 42, and also includes a ring plate gear 40 with a fixed sleeve on the one-way bearing 41. The other end of the brake shaft 42 is connected by meshing transmission with a row of teeth arranged on a fixed gear and a column rack 35, one end of the worm 39 is connected by meshing transmission with a fixed gear and the ring plate gear 40, and one end of the relay shaft 38 is connected by meshing transmission with a fixed gear and a spiral tooth of the worm 39. The relay shaft 38, the worm 39 and the brake shaft 42 are respectively movably sleeved in different through holes opened on the integrated frame 32.

[0044] The clockwork part 31 includes a focusing shaft 44 supported on the integrated frame 32, a clockwork 45 with an external fixed sleeve of the focusing shaft 44, an outer gear ring 46 of the external fixed sleeve of the clockwork 45, a support plate 43 fixed on one side of the outer gear ring 46, a side arc plate 48 fixed on the other side of the outer gear ring 46, and a retained spring piece 47 that elastically intercepts the side arc plate 48, one end of the retained spring piece 47 is fixed on the integrated frame 32, the focusing shaft 44 is movably sleeved in a through hole opened in the middle of the support plate 43, one end of the focusing shaft 44 is meshed and driven by a fixed bevel gear and a bevel gear fixed on the relay shaft 38, the neck shaft 27 is meshed and driven by a fixed gear and the outer gear ring 46, and the focusing shaft 44 is movably sleeved in a circular hole opened in the integrated frame 32.

[0045] A turntable test and calibration method for an instrument comprises the following steps:

[0046] Step 1: The corresponding scale adjustment under a single gear is achieved by changing the extension length of the door column 22 on the pressure plate 23. The reinforcing screws between the door column 22 and the pressure plate 23 are loosened, and after adjusting the extension amount of the door column 22 on the pressure plate 23, the door column 22 and the pressure plate 23 are re-fixed and connected by tightening the screws;

[0047] Step 2: The entire shifting member 6 is rotated by rotating the round handle 25, and the adjusted door-shaped column 22 is controlled to support the horizontal folding column 20 again, and the distance between two adjacent movable scale blocks 12 is changed. The physical quantity sensor drives the central axis 2 to swing the pointer 3. The scale pointed by the tip of the pointer 3 is the physical quantity measurement value. After the pointer 3 swings, the value pointed to is larger than the actual measurement value. It is necessary to adjust the distance between the two movable scale blocks 12 to increase, and if it is smaller, shorten the distance between the movable scale blocks 12 to change the length of the arc scale line;

[0048] Step three: Multiple door-shaped columns 22 in the shifting member 6 correspond to multiple shifting positions. After replacing the physical quantity sensor that drives the central axis 2 to rotate, the physical quantities of different properties can be measured by quickly rotating the shifting member 6 to control the new door-shaped column 22 to support the transverse folding column 20, thereby facilitating and quickly changing the spacing between adjacent movable scale blocks 12 and changing the length of the arc scale line.

[0049] The present invention also has a vibration dredging function. When the spacing between adjacent movable scale blocks 12 changes, the expansion and contraction amount of the arc spring 14 will also change accordingly. If a single movable scale block 12 cannot move smoothly due to contact friction when sliding on the C-shaped slide bar 13, or the expansion and contraction deformation of the arc spring 14 is slow, it will cause uneven scale lines, and the scale member 4 needs to be impacted by the outside world to make it Figure 4The supporting rod 16 in the middle vibrates up and down, and the continuous vibration impact causes all the movable scale blocks 12 to shake on the C-shaped slide bar 13. At the same time, all the arc springs 14 deform and expand and contract slightly. The shaking of the movable scale blocks 12 can break the friction barrier between the C-shaped slide bar 13, and the expansion and contraction deformation of the arc springs 14 can avoid the problem of elastic dullness. After the vibration impact ends, the elastic expansion and contraction of all the arc springs 14 are the same. Under the uniform elastic support of the arc springs 14, all the movable scale blocks 12 will also be evenly distributed, and the scales in the corresponding scale lines are evenly distributed, so that the scale value pointed to by the pointer 3 after swinging is more accurate.

[0050] The present invention collects the power of the central shaft 2 through the kinetic energy device 8, and then converts it into the driving force of the periodic vibration of the support rod 16. Specifically, the rotation of the central shaft 2 will drive the large disc wheel 9. The movement of the column rack 35 during the rotation of the large disc wheel 9 will cause the column rack 35 to continuously telescope and move, thereby causing the brake shaft 42 to reciprocate. Then, the ring plate gear 40 is controlled by the one-way bearing 41 to perform intermittent directional rotation. Next, the worm 39 rotates in a directional manner to drive the relay shaft 38 to rotate. Then, the focusing shaft 44 rotates to cause the spring 45 to contract and store power. The mainspring 45 provides pressure to the outer gear ring 46, and the pressure causes the edge arc plate 48 to break through the interception of the retained shrapnel 47. That is, the mainspring 45 will release the power after being saturated, causing the outer gear ring 46 to quickly rotate one circle. During the process, the outer gear ring 46 drives the neck shaft 27, and then drives the side shaft 29 to rotate through the branch shaft 26. Next, the vertical shaft 30 drives the follower shaft 21, so that the camshaft 19 drives the cam 18 to quickly rotate multiple circles. The convex block on the cam 18 repeatedly impacts the concave plate 17, and the concave plate 17 pushes the support rod 16, causing the support rod 16 to vibrate continuously.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A turntable test and calibration device for an instrument, comprising an instrument panel (1), characterized in that: A rotating central axis (2) passes through the middle of the instrument panel (1), a pointer (3) is vertically fixed at one end of the central axis (2), the tip of the pointer (3) displays the measured value by pointing to a scale member (4) arranged on the front of the instrument panel (1), both ends of the scale member (4) are in contact with a calibrated lifting member (5), and the side of the lifting member (5) facing away from the scale member (4) is in contact with a shifting member (6) for measuring the gear shift, the front of the instrument panel (1) is fixed with a protective plate (7) to support the lifting member (5) and the shifting member (6), the protective plate (7) includes a panel and a horizontal column vertically fixed on the panel, a kinetic energy device (8) is arranged on the back of the instrument panel (1), a large disc wheel (9) is arranged between the kinetic energy device (8) and the central axis (2) to establish transmission, and a shaft assembly (10) is arranged between the kinetic energy device (8) and the lifting member (5) to establish transmission.

2. The turntable test and calibration device for an instrument according to claim 1, characterized in that: The scale member (4) comprises a positioning scale block (11) fixed on the instrument panel (1), movable scale blocks (12) arranged in an arc shape on both sides of the positioning scale block (11), a C-shaped slide bar (13) connecting the positioning scale block (11) and the movable scale block (12), and an arc spring (14) supporting between two adjacent movable scale blocks (12) or between the positioning scale block (11) and the movable scale block (12), wherein the arc spring The spring (14) is sleeved on the C-shaped slide bar (13), and the C-shaped slide bar (13) slides through the arc column hole opened on the movable scale block (12), and the C-shaped slide bar (13) and the positioning scale block (11) are fixedly connected. The front of the instrument panel (1) is also provided with a C-shaped column (15) with scales to display the distance between two adjacent movable scale blocks (12), and supporting rods (16) are fixed on the movable scale blocks (12) at both ends of the scale member (4).

3. The turntable test and calibration device for an instrument according to claim 2, characterized in that: The lifting member (5) comprises a transverse folding column (20), a concave folding plate (17) supported at both ends of the transverse folding column (20), a cam (18) contacting the concave folding plate (17) below, a cam shaft (19) vertically fixed on the cam (18), and a follower shaft (21) vertically fixed at one end of the cam shaft (19). The cam (18) comprises a disc body and a convex block arranged at the edge of one end of the disc body. The support rod (16) and the cam (18) cooperate to clamp the concave folding plate (17). The transverse folding column (20) is provided with a vertical column to slide through a square hole opened on the transverse column of the protective plate (7). The end of the concave folding plate (17) slides through the square hole opened on the transverse folding column (20). The end of the cam shaft (19) is connected to the bevel gear fixed at one end of the follower shaft (21) through meshing transmission. The transverse folding column (20) is provided with a T-shaped frame to support the cam shaft (19) and the follower shaft (21).

4. The turntable test and calibration device for an instrument according to claim 3, characterized in that: The shifting member (6) comprises an adjusting shaft (24), a round handle (25) fixed at one end of the adjusting shaft (24), a pressure plate (23) fixed at the other end of the adjusting shaft (24), and a plurality of door-shaped columns (22) fixed in an annular manner on the pressure plate (23), wherein one of the door-shaped columns (22) contacts the middle part of the supporting transverse folding column (20), and the adjusting shaft (24) is movably sleeved in a through hole opened on the panel of the protective plate (7).

5. The turntable test and calibration device for an instrument according to claim 3, characterized in that: The shaft assembly (10) comprises a shaft frame (28), and a sub-shaft (26), a neck shaft (27), a side shaft (29) and a vertical shaft (30) supported on the shaft frame (28); the middle of the sub-shaft (26) is provided with a neck shaft (27) for vertical transmission, and both ends of the sub-shaft (26) are provided with side shafts (29) for vertical transmission; one end of the side shaft (29) and the vertical shaft (30) are vertically transmitted, and transmission is established between the neck shaft (27), the sub-shaft (26), the side shaft (29) and the vertical shaft (30) by arranging bevel gears; the neck shaft (27) is connected to the kinetic energy device (8) in transmission connection; and the vertical shaft (30) is connected to the meshing transmission of a fixed long cylinder gear and a gear fixed on the follower shaft (21).

6. The turntable test and calibration device for an instrument according to claim 5, characterized in that: The kinetic energy device (8) comprises an integrated frame (32) fixed on the instrument panel (1), a collecting part (34) contacting and transmitting with a large disc wheel (9), a spring part (31) transmitting with a neck shaft (27), and a direction part (33) establishing transmission between the spring part (31) and the collecting part (34), wherein the large disc wheel (9) is fixedly sleeved on the central shaft (2).

7. The turntable test and calibration device for an instrument according to claim 6, characterized in that: The collecting part (34) comprises a guide square tube (36) fixed on the integrated frame (32), a column rack (35) sliding through the guide square tube (36), and a return spring piece (37) elastically supporting one end of the column rack (35), one end of the return spring piece (37) being fixed on the guide square tube (36), and the outer edge side wall of the large disk wheel (9) is in contact with the other end of the column rack (35) by providing a wavy surface.

8. The turntable test and calibration device for an instrument according to claim 7, characterized in that: The direction portion (33) includes a relay shaft (38), a worm (39) and a brake shaft (42) supported on an integrated frame (32), and a one-way bearing (41) fixed on one end of the brake shaft (42), and also includes a ring plate gear (40) fixed on the one-way bearing (41); the other end of the brake shaft (42) is connected to a row of teeth meshingly arranged on a column rack (35) through a fixed gear; one end of the worm (39) is connected to the ring plate gear (40) through a fixed gear; and one end of the relay shaft (38) is connected to the helical teeth of the fixed gear and the worm (39) through a meshing transmission.

9. The turntable test and calibration device for an instrument according to claim 8, characterized in that: The spring part (31) comprises a force-gathering shaft (44) supported on an integrated frame (32), a spring (45) with an external fixed sleeve of the force-gathering shaft (44), an external gear ring (46) with an external fixed sleeve of the spring (45), a support plate (43) fixed on one side of the external gear ring (46), an edge arc plate (48) fixed on the other side of the external gear ring (46), and a retaining spring piece (47) elastically intercepting the edge arc plate (48), one end of the retaining spring piece (47) is fixed on the integrated frame (32), the force-gathering shaft (44) is movably sleeved in a through hole opened in the middle of the support plate (43), one end of the force-gathering shaft (44) is meshed and driven connected with a fixed bevel gear and a fixed bevel gear on the relay shaft (38), and the neck shaft (27) is meshed and driven connected with the external gear ring (46) through a fixed gear.

10. A method for testing and calibrating a turntable of an instrument, used in the turntable testing and calibration device of an instrument as claimed in claim 1, characterized in that: The following steps are involved: Step 1: The corresponding scale adjustment under a single gear position is achieved by changing the extension length of the door column (22) on the pressure plate (23), loosening the reinforcing screws between the door column (22) and the pressure plate (23), adjusting the extension amount of the door column (22) on the pressure plate (23), and then tightening the screws to re-fix the door column (22) and the pressure plate (23); Step 2: The entire shifting member (6) is rotated by rotating the round handle (25), and the adjusted door-shaped column (22) is controlled to support the horizontal folding column (20) again, so as to change the distance between two adjacent movable scale blocks (12). The physical quantity sensor drives the central axis (2) to swing the pointer (3), and the scale pointed by the tip of the pointer (3) is the physical quantity measurement value. If the value pointed by the pointer (3) after the swing is larger than the actual measurement value, it is necessary to adjust the distance between the two movable scale blocks (12) to increase, and if it is smaller, shorten the distance between the movable scale blocks (12) to change the length of the arc scale line; Step 3: Multiple gate-shaped columns (22) in the shifting member (6) correspond to multiple shifting positions. After replacing the physical quantity sensor driving the central shaft (2) to rotate, physical quantities of different properties can be measured by quickly rotating the shifting member (6) to control the new gate-shaped column (22) to support the transverse folding column (20), thereby conveniently and quickly changing the spacing between adjacent movable scale blocks (12) and changing the length of the arc scale line.

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