CN107314850B - A capacitive sensing wire tension measuring device - Google Patents

Abstract

The invention discloses a capacitance induction type silk thread tension measuring device, which comprises a fixed disc, a rotating disc and a fixed shaft, wherein the fixed disc is connected with the rotating disc through the fixed shaft; the fixed plate is provided with a first coaxial annular groove, the lower surface of the rotating disk is provided with a second coaxial annular groove, the first coaxial annular groove and the second coaxial annular groove are respectively provided with a fixed polar plate frame and a rotating polar plate frame, the fixed polar plate frame is connected with the fixed polar plate, the rotating polar plate frame is connected with the rotating polar plate, and the fixed polar plate and the rotating polar plate form a polar plate pair with a fixed gap; the slide block is provided with a fixed guide wheel which is fixedly connected with the fixed shaft through a connecting arm, and the rotary disk is provided with a first rotary guide wheel and a second rotary guide wheel respectively. According to the capacitance induction type silk thread tension measuring device, silk thread tension is converted into a relative rotation angle of an induction capacitance array, the area of an induction capacitor is changed, and the capacitance variation is detected through a capacitance measuring circuit, so that the size of the silk thread tension is reflected.

Description

A capacitive sensing wire tension measuring device

technical field

The invention relates to a capacitive sensing type wire tension measuring device.

Background technique

Thread tension measurement is an important link in the textile process. Real-time measurement of thread tension is related to fabric quality and production efficiency. Most of the tension measurement methods use the cantilever beam and the strain resistance method to convert the tension into an electrical signal. Tension measurement using capacitive sensing has been used in other fields, such as the method for measuring steel wire rope tension using capacitive sensing described in documents CN201110376420 and CN201110376461. However, the tension measured by this method changes with the gap between the capacitor plates, and the relationship between the two is inversely proportional, and it is difficult to linearize; and the small gap changes will cause large changes in the measurement results, and are susceptible to external vibrations and shocks. It has high requirements on the application environment and is not suitable for the measurement of thread tension.

Contents of the invention

The purpose of the present invention is to provide a capacitive sensing type wire tension measuring device, which converts the wire tension into the relative rotation angle of the sensing capacitor array, changes the area of the sensing capacitor, and detects the capacitance change through the capacitance measuring circuit, thereby reflecting the size of the wire tension .

In order to achieve the above object, technical scheme of the present invention is:

A capacitive sensing wire tension measuring device, comprising a fixed disk, a rotating disk, and a fixed shaft, the fixed disk is connected to the rotating disk through the fixed shaft; more than one first coaxial annular groove is provided on the fixed disk, The lower surface of the rotating disc is provided with more than one second coaxial annular groove, and the first coaxial annular groove and the second coaxial annular groove are respectively equipped with a fixed pole plate holder and a rotating pole plate holder, and the The fixed pole plate frame and the rotating pole plate frame are installed at intervals, the fixed pole plate frame is connected to the fixed pole plate, the rotating pole plate frame is connected to the rotating pole plate, and a fixed gap is formed between the fixed pole plate and the rotating pole plate A pair of pole plates; the upper surface of the rotating disk is provided with an arc-shaped groove, and a slider and a spring are respectively installed in the arc-shaped groove. One end of the spring is connected with the slider, and the other end of the spring is connected with the rotating disk. The inner wall of the arc-shaped groove is connected; the slider is equipped with a fixed guide wheel, and the fixed guide wheel is fixedly connected with the fixed shaft through the connecting arm. The first rotating guide wheel and the second rotating disc are respectively installed on the rotating disk Rotate guide wheel.

The included angle between the line between the first rotating guide wheel and the fixed shaft and the line between the second rotating guide wheel and the fixed shaft is 90 degrees.

The arc-shaped groove is a quarter of a circle, and the centerlines of the guide wheels of the first rotating guide wheel and the second rotating guide wheel are located on the same circle as the arc-shaped groove.

A shielding shell is installed outside the fixed disk, a shielding cover is installed outside the rotating disk, the shielding shell is connected with the shielding cover, and an arc-shaped hole is opened on the shielding cover.

The fixed shaft includes a shoulder, the shoulder is connected to the first step column, the first step column is connected to the second step column, the second step column is connected to the third step column, and the third step The column is connected with the threaded rod, and the first keyway is opened on the third stepped column; the fixed plate is installed coaxially with the fixed shaft, and the fixed plate is installed on the first stepped column; the second stepped column and the bearing The inner ring is connected, and the outer ring of the bearing is connected with the rotating disk.

A first fixed positioning pinhole is opened on the side wall of the fixed plate, a second fixed positioning pinhole is opened on the lower side wall of the fixed plate frame, and the fixed plate passes through the first fixed positioning pin through the fixed positioning pin Holes and second fixed positioning pinholes are connected to the fixed pole plate frame, and the fixed pole plate is bonded to the fixed pole plate frame; the first rotation positioning pinhole is opened on the side wall of the rotating disk, and the rotating pole A second rotation positioning pinhole is opened on the upper side wall of the plate frame, and the rotating disk passes through the first rotation positioning pinhole and the second rotation positioning pinhole through the rotation positioning pin and is connected with the rotating pole plate holder. A rotating pole plate is glued on the plate frame.

One end of the connecting arm is provided with a first shaft hole, and the inner wall of the first shaft hole is provided with a second keyway, and the first shaft hole is installed and fixed on the third step column, and the second keyway and the first A key is installed in a key groove, and a lock nut is installed on the threaded rod above the first shaft hole, and the lock nut is installed against the connecting arm; the other end of the connecting arm is provided with a second shaft hole.

A fixed guide wheel shaft is installed on the slider, and the fixed guide wheel shaft includes a fixed guide wheel shaft threaded rod. The optical axis of the wheel shaft is connected, the optical axis of the first fixed guide wheel shaft is connected with the optical axis of the second fixed guide wheel shaft, and the optical axis of the second fixed guide wheel shaft is provided with a fixed guide wheel shaft groove; the threaded rod of the fixed guide wheel shaft is connected to the The slider is connected, the optical axis of the first fixed guide wheel shaft passes through the second shaft hole and is connected with the connecting arm, the second fixed guide wheel shaft is equipped with a fixed guide wheel on the optical axis, and the fixed guide wheel shaft is installed in the groove There is a fixed guide wheel shaft snap ring.

A first rotating guide wheel shaft is installed on the rotating disk, and the first rotating guide wheel shaft includes a threaded rod of the first rotating guide wheel shaft, and the threaded rod of the first rotating guide wheel shaft is connected with a hexagonal column of the first rotating guide wheel shaft. The hexagonal column of the first rotating guide wheel shaft is connected to the optical axis of the first rotating guide wheel shaft, and a first rotating guide wheel shaft groove is opened on the optical axis of the first rotating guide wheel shaft; the threaded rod of the first rotating guide wheel shaft is connected to the rotating disk , a first rotating guide wheel is installed on the optical axis of the first rotating guide wheel shaft, and a first rotating guide wheel shaft retaining spring is installed in the groove of the first rotating guide wheel shaft.

A second rotating guide wheel shaft is installed on the rotating disk, and the second rotating guide wheel shaft includes a threaded rod of the second rotating guide wheel shaft, and the threaded rod of the second rotating guide wheel shaft is connected with a hexagonal column of the second rotating guide wheel shaft. The hexagonal column of the second rotating guide wheel shaft is connected to the optical axis of the second rotating guide wheel shaft, and a second rotating guide wheel shaft groove is opened on the optical axis of the second rotating guide wheel shaft; the threaded rod of the second rotating guide wheel shaft is connected to the rotating disk , a second rotating guide wheel is installed on the optical axis of the second rotating guide wheel shaft, and a second rotating guide wheel shaft retaining spring is installed in the groove of the second rotating guide wheel shaft.

The beneficial effects of the present invention are: (1) The present invention adopts the capacitor plate array form to improve the structure of the inductive capacitor, effectively increases the sensing area, and improves the sensitivity of the measurement; (2) converts the thread tension into the relative rotation of the capacitor plate Angle, changing the sensing area, avoiding the nonlinear problem caused by the change of the plate gap, improving the stability of the signal, and reducing the difficulty of signal processing.

Description of drawings

Fig. 1 is a schematic structural view of an unshielded assembly of the present invention;

Fig. 2 is a sectional view of the present invention;

Fig. 3 is a schematic diagram of the structure of the fixed shaft;

Fig. 4 is a schematic diagram of the structure of the fixed disk;

5 is a schematic diagram of the structure of the sensing capacitor;

Fig. 6 is a schematic diagram of the structure of the top surface of the rotating disk;

Figure 7 is a schematic diagram of the structure of the bottom surface of the rotating disk;

Figure 8 is a schematic diagram of the structure of the fixed guide wheel shaft;

Fig. 9 is a schematic structural diagram of the first rotating guide wheel shaft;

Fig. 10 is a schematic structural diagram of the second rotating guide wheel shaft;

Figure 11 Schematic diagram of the connecting arm structure;

Figure 12 is a schematic diagram of the structure of the shielding case;

Fig. 13 is a schematic diagram of the structure of the shielding cover;

Figure 14 is a schematic diagram of capacitor connection;

Figure 15 is a schematic diagram of the state of the initial position of the winding;

Fig. 16 is a schematic diagram of the position of the rotating disk after it rotates at a certain angle.

Detailed ways

Example 1

As shown in Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 6, and Fig. 7, a capacitance-inductive wire tension measuring device includes a fixed disk 1, a rotating disk 2, and a fixed shaft 3, and the fixed disk 1 passes through The fixed shaft 3 is connected to the rotating disk 2; the fixed disk 1 is provided with more than one first coaxial annular groove 11, and the lower surface of the rotating disk 2 is provided with more than one second coaxial annular groove 21, The first coaxial annular groove 11 and the second coaxial annular groove 21 are respectively equipped with a fixed pole plate holder 41 and a rotating pole plate holder 42, and the fixed pole plate holder 41 and the rotating pole plate holder 42 are installed at intervals, The fixed pole plate holder 41 is connected to the fixed pole plate 43, the rotating pole plate holder 42 is connected to the rotating pole plate 44, and the fixed pole plate 43 and the rotating pole plate 44 form a pair of pole plates with a fixed gap; The upper surface of the rotary disk 2 is provided with an arc-shaped groove 22, and a slider 23 and a spring 24 are respectively installed in the arc-shaped groove 22. One end of the spring 24 is connected with the slider 23, and the arc shape of the rotary disk 2 A spring seat is installed in the groove 22, and the other end of the spring 24 is connected to the spring seat; a fixed guide wheel 4 is installed on the slider 23, and the fixed guide wheel 4 is fixedly connected with the fixed shaft 3 through the connecting arm 5, A first rotating guide wheel 6 and a second rotating guide wheel 7 are installed on the rotating disk 2 respectively. The fixed disk 1, the rotating disk 2, the fixed plate frame 41 and the rotating plate frame 42 are all made of insulating materials. The fixed pole plate 43 and the rotating pole plate 44 are made of copper foil or aluminum foil, and aluminum oxide is sprayed on the surface to insulate the surface.

The included angle between the line between the first rotating guide wheel 6 and the fixed shaft 3 and the line between the second rotating guide wheel 7 and the fixed shaft 3 is 90 degrees.

The arc-shaped groove 22 is a quarter of a circle, and the guide wheel axes of the first rotating guide wheel 6 and the second rotating guide wheel 7 are located on the same circle as the arc-shaped groove 22 .

As shown in Figure 12 and Figure 13, a shielding shell 91 is installed outside the fixed disk 1, a shielding cover 92 is installed outside the rotating disk 2, the shielding shell 91 is connected with the shielding cover 92, and the shielding cover 92 is An arc-shaped hole 93 is opened. The bottom plate of the shielding case 91 has a central hole, and four circular holes are opened around the central hole, corresponding to the four circular holes on the shoulder 31 of the fixed shaft 3 and the four threaded holes on the fixed disk 1 . The shielding shell 91 is installed between the shoulder 31 of the fixed shaft 3 and the fixed disk 1, and the three are fixed by screws. The shielding cover 92 includes a top plate and a skirt, and the diameter of the top plate is larger than that of the side wall of the shielding shell 91, so that the side wall of the shielding shell 91 can be embedded in the skirt of the shielding cover 92 and closely contacted. After the shielding cover 92 is installed, the fixed guide wheel shaft 61 is placed in the edge circular hole, and the first rotating guide wheel shaft 71 and the second guide wheel shaft 81 are placed in the arc-shaped holes. Both the shielding shell 91 and the shielding cover 92 are made of conductive materials.

As shown in Figure 3, the fixed shaft 3 includes a shaft shoulder 31, and four round holes are opened on the end surface of the shaft shoulder 31; corresponding to the hole. The shoulder 31 is connected to the first stepped column 32, the first stepped column 32 is connected to the second stepped column 33, the second stepped column 33 is connected to the third stepped column 34, and the third stepped column 34 Connected with the threaded rod 35, the third step column 34 is provided with a first keyway 36; the fixed plate 1 is installed coaxially with the fixed shaft 3, and the fixed plate 1 is installed on the first stepped column 32; The two-step column 33 is connected with the inner ring of the bearing 37 , and the outer ring of the bearing 37 is connected with the rotating disk 2 .

The side wall of the fixed disk 1 is provided with a first fixed positioning pinhole 12, and the lower side wall of the fixed plate frame 41 is provided with a second fixed positioning pinhole 13, and the fixed disk 1 passes through the fixed positioning needle. After the first fixed positioning pinhole 12 and the second fixed positioning pinhole 13, they are connected to the fixed pole plate frame 41, and the fixed pole plate frame 41 is bonded with a fixed pole plate 43; The first rotation positioning pinhole 25, the second rotation positioning pinhole 26 is opened on the upper side wall of the rotating pole frame 42, and the rotating disk 2 passes through the first rotation positioning pinhole 25 and the second rotation positioning pinhole 25 through the rotation positioning needle. After the pinhole 26 is rotated and positioned, it is connected with the rotating pole plate holder 42 , and the rotating pole plate 44 is bonded to the rotating pole plate holder 42 .

As shown in Figure 11, a first shaft hole 51 is opened at one end of the connecting arm 5, and a second keyway 52 is opened on the inner wall of the first shaft hole 51, and the first shaft hole 51 is installed and fixed on the third step. On the column 34, and the key 53 is installed in the second keyway 52 and the first keyway 36, and a lock nut 55 is installed on the threaded rod 35 above the first shaft hole 51, and the lock nut 55 is connected with the The arm 5 is installed against it; the other end of the connecting arm 5 is provided with a second shaft hole 54 .

As shown in Figure 8, a fixed guide wheel shaft 61 is installed on the slider 23, the fixed guide wheel shaft 61 includes a fixed guide wheel shaft threaded rod 62, and the fixed guide wheel shaft threaded rod 62 is connected with the fixed guide wheel shaft hexagonal column 63, The hexagonal column 63 of the fixed guide wheel shaft is connected with the optical axis 64 of the first fixed guide wheel shaft, the optical axis 64 of the first fixed guide wheel shaft is connected with the optical axis 65 of the second fixed guide wheel shaft, and the optical axis 65 of the second fixed guide wheel shaft A fixed guide wheel shaft groove 66 is opened on the top; the fixed guide wheel shaft threaded rod 62 is connected with the slider 23, and the first fixed guide wheel shaft optical axis 64 is connected with the connecting arm 5 after passing through the second shaft hole 54. Fixed guide wheel 4 is installed on the second fixed guide wheel shaft optical axis 65, and fixed guide wheel shaft jumper 67 is installed in described fixed guide wheel shaft groove 66, and the setting of fixed guide wheel shaft jumper 67 prevents fixed guide wheel 4 from coming off.

As shown in Figure 9, a first rotating guide wheel shaft 71 is installed on the rotating disk 2, and the first rotating guide wheel shaft 71 includes a first rotating guide wheel shaft threaded rod 72, and the first rotating guide wheel shaft threaded rod 72 is connected to the first rotating guide wheel shaft threaded rod 72. The first rotating guide wheel shaft hexagonal column 73 is connected, the first rotating guide wheel shaft hexagonal column 73 is connected with the first rotating guide wheel shaft optical axis 74, and the first rotating guide wheel shaft optical axis 74 is provided with a first rotating guide wheel shaft groove Groove 75; the threaded rod 72 of the first rotating guide wheel shaft is connected to the rotating disk 2, the first rotating guide wheel 6 is installed on the optical axis 74 of the first rotating guide wheel shaft, and the groove 75 of the first rotating guide wheel shaft The first rotating guide wheel shaft clip spring 76 is installed, and the setting of the first rotating guide wheel shaft clip spring 76 prevents the first rotating guide wheel 6 from falling off.

As shown in Figure 10, a second rotating guide wheel shaft 81 is installed on the rotating disk 2, and the second rotating guide wheel shaft 81 includes a second rotating guide wheel shaft threaded rod 82, and the second rotating guide wheel shaft threaded rod 82 is connected to The second rotating guide wheel shaft hexagonal column 83 is connected, the second rotating guide wheel shaft hexagonal column 83 is connected with the second rotating guide wheel shaft optical axis 84, and the second rotating guide wheel shaft optical axis 84 is provided with a second rotating guide wheel shaft groove Groove 85; the threaded rod 82 of the second rotating guide wheel shaft is connected to the rotating disk 2, the second rotating guide wheel 7 is installed on the optical axis 84 of the second rotating guide wheel shaft, and the groove 85 of the second rotating guide wheel shaft A second rotating guide wheel shaft clip 86 is installed, and the setting of the second rotating guide wheel shaft clip 86 prevents the second rotating guide wheel 7 from falling off.

As shown in Fig. 14, Fig. 15 and Fig. 16, the working principle of a capacitive sensing wire tension measuring device: After the device is installed, connect each pole plate on the fixed pole plate 43 with a wire to form a pole of the inductive capacitance Each pole plate on the rotating pole plate 44 is connected together with a wire to form the other pole of the inductive capacitor. At the initial position, the fixed pole plate 43 is in the same position as the rotating pole plate 44, the area of the inductive capacitor is the largest, and the capacitance value is also the largest. When rotating, the guide wheel shaft 61 is fixed so that the slide block 23 is fixed, and one end of the spring 24 is fixed, and the other end rotates together with the rotating disk 2, so that the spring 24 is compressed. By passing the wire around the fixed guide wheel 4, the first rotating guide wheel 6, and the second rotating guide wheel 7, a rotational torque will be generated on the rotating assembly, and it will be driven to rotate in the direction of compression of the spring 24 until it meets the compression force of the spring 24. Achieve balance. The greater the thread tension, the greater the generated rotational moment, and the greater the rotation angle of the rotating disk 2 . The rotation of the rotating disk 2 drives the rotating plate 44 to generate dislocation, which reduces the area of the inductive capacitor and the capacitance value. As mentioned above, the greater the thread tension is, the greater the rotation angle of the rotating disk 2 is, the smaller the area of the inductive capacitor is, and the greater the change of the capacitance value is. Capacitance measurement circuit (CV circuit) can accurately measure capacitance change, and then convert it into wire tension. In addition, the shielding shell 91 and the shielding cover 92 enclose the sensing capacitor to reduce the influence of external electromagnetic interference on the sensing capacitor.

The capacitive sensing wire tension measuring device of this embodiment converts the wire tension into the relative rotation angle of the sensing capacitor array, changes the area of the sensing capacitor, and detects the change in capacitance through a capacitance measuring circuit, thereby reflecting the magnitude of the wire tension.

Claims (8)

1. A capacitive sensing wire tension measurement device, characterized in that: the device comprises a fixed disc (1), a rotating disc (2) and a fixed shaft (3), wherein the fixed disc (1) is connected with the rotating disc (2) through the fixed shaft (3); the fixed disc (1) is provided with more than 1 first coaxial annular grooves (11), the lower surface of the rotating disc (2) is provided with more than 1 second coaxial annular grooves (21), the first coaxial annular grooves (11) and the second coaxial annular grooves (21) are respectively provided with a fixed polar plate frame (41) and a rotating polar plate frame (42), the fixed polar plate frame (41) is arranged at intervals with the rotating polar plate frame (42), the fixed polar plate frame (41) is connected with the fixed polar plate (43), the rotating polar plate frame (42) is connected with the rotating polar plate (44), and the fixed polar plate (43) and the rotating polar plate (44) form a polar plate pair with a fixed gap; an arc-shaped groove (22) is formed in the upper surface of the rotary disk (2), a sliding block (23) and a spring (24) are respectively arranged in the arc-shaped groove (22), one end of the spring (24) is connected with the sliding block (23), and the other end of the spring (24) is connected with the inner side wall of the arc-shaped groove (22) of the rotary disk (2); the fixed guide wheel (4) is mounted on the sliding block (23), the fixed guide wheel (4) is fixedly connected with the fixed shaft (3) through the connecting arm (5), and the first rotary guide wheel (6) and the second rotary guide wheel (7) are respectively mounted on the rotary disk (2);

the fixed shaft (3) comprises a shaft shoulder (31), the shaft shoulder (31) is connected with a first step column (32), the first step column (32) is connected with a second step column (33), the second step column (33) is connected with a third step column (34), the third step column (34) is connected with a threaded rod (35), and a first key groove (36) is formed in the third step column (34); the fixed disc (1) and the fixed shaft (3) are coaxially arranged, and the fixed disc (1) is arranged on the first step column (32); the second step column (33) is connected with the inner ring of the bearing (37), and the outer ring of the bearing (37) is connected with the rotating disc (2); a first fixed positioning pinhole (12) is formed in the side wall of the fixed disc (1), a second fixed positioning pinhole (13) is formed in the lower side wall of the fixed polar plate frame (41), the fixed disc (1) passes through the first fixed positioning pinhole (12) and the second fixed positioning pinhole (13) through fixed positioning needles and then is connected with the fixed polar plate frame (41), and a fixed polar plate (43) is adhered to the fixed polar plate frame (41); the rotary plate comprises a rotary plate frame (42), and is characterized in that a first rotary positioning pinhole (25) is formed in the side wall of the rotary plate frame (2), a second rotary positioning pinhole (26) is formed in the upper side wall of the rotary plate frame (42), the rotary plate (2) passes through the first rotary positioning pinhole (25) and the second rotary positioning pinhole (26) through rotary positioning needles and then is connected with the rotary plate frame (42), and a rotary plate (44) is bonded on the rotary plate frame (42).

2. A capacitive sensing wire tension measuring device as defined in claim 1, wherein: an included angle between a connecting line between the first rotary guide wheel (6) and the fixed shaft (3) and a connecting line between the second rotary guide wheel (7) and the fixed shaft (3) is 90 degrees.

3. A capacitive sensing wire tension measuring device as defined in claim 2, wherein: the arc-shaped groove (22) is a quarter ring, and the guide wheel axial leads of the first rotary guide wheel (6) and the second rotary guide wheel (7) and the arc-shaped groove (22) are positioned on the same ring.

4. A capacitive sensing wire tension measuring device as defined in claim 1, wherein: the shielding cover is characterized in that a shielding shell (91) is arranged outside the fixed disc (1), a shielding cover (92) is arranged outside the rotating disc (2), the shielding shell (91) is connected with the shielding cover (92), and an arc-shaped hole (93) is formed in the shielding cover (92).

5. A capacitive sensing wire tension measuring device as defined in claim 1, wherein: a first shaft hole (51) is formed in one end of the connecting arm (5), a second key groove (52) is formed in the inner side wall of the first shaft hole (51), the first shaft hole (51) is fixedly arranged on the third step column (34), keys (53) are arranged in the second key groove (52) and the first key groove (36), a locking nut (55) is arranged on a threaded rod (35) above the first shaft hole (51), and the locking nut (55) is tightly abutted to the connecting arm (5); the other end of the connecting arm (5) is provided with a second shaft hole (54).

6. A capacitive sensing wire tension measuring device as defined in claim 1, wherein: the fixed guide wheel shaft (61) is arranged on the sliding block (23), the fixed guide wheel shaft (61) comprises a fixed guide wheel shaft threaded rod (62), the fixed guide wheel shaft threaded rod (62) is connected with a fixed guide wheel shaft hexagonal column (63), the fixed guide wheel shaft hexagonal column (63) is connected with a first fixed guide wheel shaft optical axis (64), the first fixed guide wheel shaft optical axis (64) is connected with a second fixed guide wheel shaft optical axis (65), and a fixed guide wheel shaft groove (66) is formed in the second fixed guide wheel shaft optical axis (65); the fixed guide wheel shaft threaded rod (62) is connected with the sliding block (23), the first fixed guide wheel shaft optical axis (64) passes through the second shaft hole (54) and then is connected with the connecting arm (5), the fixed guide wheel (4) is installed on the second fixed guide wheel shaft optical axis (65), and the fixed guide wheel shaft clamp spring (67) is installed in the fixed guide wheel shaft groove (66).

7. A capacitive sensing wire tension measuring device as defined in claim 1, wherein: the rotary disc (2) is provided with a first rotary guide wheel shaft (71), the first rotary guide wheel shaft (71) comprises a first rotary guide wheel shaft threaded rod (72), the first rotary guide wheel shaft threaded rod (72) is connected with a first rotary guide wheel shaft hexagonal column (73), the first rotary guide wheel shaft hexagonal column (73) is connected with a first rotary guide wheel shaft optical axis (74), and a first rotary guide wheel shaft groove (75) is formed in the first rotary guide wheel shaft optical axis (74); the first rotating guide wheel shaft threaded rod (72) is connected with the rotating disc (2), a first rotating guide wheel (6) is installed on the first rotating guide wheel shaft optical axis (74), and a first rotating guide wheel shaft clamp spring (76) is installed in the first rotating guide wheel shaft groove (75).

8. A capacitive sensing wire tension measuring device as defined in claim 1, wherein: the rotary disc (2) is provided with a second rotary guide wheel shaft (81), the second rotary guide wheel shaft (81) comprises a second rotary guide wheel shaft threaded rod (82), the second rotary guide wheel shaft threaded rod (82) is connected with a second rotary guide wheel shaft hexagonal column (83), the second rotary guide wheel shaft hexagonal column (83) is connected with a second rotary guide wheel shaft optical axis (84), and a second rotary guide wheel shaft groove (85) is formed in the second rotary guide wheel shaft optical axis (84); the second rotary guide wheel shaft threaded rod (82) is connected with the rotary disc (2), a second rotary guide wheel (7) is installed on the second rotary guide wheel shaft optical axis (84), and a second rotary guide wheel shaft clamp spring (86) is installed in the second rotary guide wheel shaft groove (85).

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