Device and method for measuring rotation angle of extruder

Abstract

The present application provides a device and method for measuring the rotation angle of an extruder, which belongs to the technical field of pile foundation construction equipment for engineering construction. The technical solution provided by the embodiment of the present application is that the angle measurement unit is arranged between the support unit and the extruder, and the angle measurement unit and the extruder can rotate synchronously. Since there is a magnetic field on the surface of the earth, and the direction of the magnetic field lines of the magnetic field is always maintained from north to south, when in use, direct current is passed through the magnetic sensitive ring. When the extruder drives the angle measurement unit to rotate, the energized magnetic sensitive ring cuts the magnetic field lines at different positions, which will generate electromotive forces of different sizes. Therefore, the electromotive force can reflect the size of the angle rotated by the magnetic sensitive ring. By transmitting the electromotive force as an angle signal to the receiving unit, the receiving unit can quickly obtain the rotation angle information of the extruder based on the angle signal, with a small error, and no manual operation by technicians is required.

Description

Technical Field

[0001] The present application relates to the technical field of engineering construction pile foundation construction equipment, and in particular to a device and method for measuring the rotation angle of an extruder. Background Art

[0002] During the construction of engineering building pile foundations, after the main body of the pile hole of the building pile foundation is formed and before pouring concrete, an extruder can be used to extrude and expand a disc-shaped groove in the pile hole. Later, when pouring concrete into the pile hole, a bearing plate can be formed at the position corresponding to the disc-shaped groove. The foundation pile obtained in this way is an extruded branch plate pile. For this type of extruded branch plate pile, the bearing plate increases the end-side contact area between the pile and the soil, thereby improving the bearing capacity of the extruded branch plate pile. Compared with ordinary cast-in-place piles, extruded branch plate piles have many advantages: the bearing capacity is increased several times, materials are saved, there is no environmental pollution, the construction period is shortened, the economic benefits are obvious, the bearing capacity is adjustable, it is suitable for various soil layers, and the pile-making process has a wide range of applications.

[0003] An extruder is used in the pile hole to extrude and expand a disc-shaped groove. The extruder has two pairs of symmetrically arranged bow pressure arms. By rotating the angle, the bow pressure arms are extruded in multiple directions along the circumference to form a disc-shaped groove. At present, an angle disk is usually placed at the borehole mouth. The technician obtains the rotation angle of the extruder by observing the angle of the pull rod relative to the angle disk. However, the scale accuracy on the above angle disk is low. The rotation angle of the extruder is obtained by manual reading, which has a large error and is cumbersome to operate. Summary of the invention

[0004] The embodiment of the present application provides a device and method for measuring the rotation angle of an extruder, which can obtain the rotation angle information of the extruder with small error and without manual operation by technicians. The technical solution is as follows:

[0005] On the one hand, a device for measuring the rotation angle of an extrusion and expansion machine is provided, the device comprising: an extrusion and expansion machine, a support unit, an angle measuring unit and a receiving unit;

[0006] The support unit, the angle measuring unit and the extrusion machine are connected in sequence from top to bottom, and the angle measuring unit and the extrusion machine can rotate synchronously. The extrusion machine is used to be installed in the pile hole to be extruded and expanded. The support unit is located on the ground above the pile hole, and the support unit is used to support the extrusion machine;

[0007] The angle measurement unit comprises: a housing, a central axis, a magnetic sensitive ring and a signal output end, wherein the central axis and the magnetic sensitive ring are both located in the inner cavity of the housing, the central axis passes through the magnetic sensitive ring at the symmetry axis position of the magnetic sensitive ring, and the two ends of the central axis are fixed on the top wall and the bottom wall of the housing;

[0008] The two points where the magnetic sensitive ring intersects with the central axis are respectively connected to the positive pole and the negative pole of the DC power supply, so that an angle signal can be generated during the rotation of the magnetic sensitive ring. The magnetic sensitive ring is connected to the signal output end, and the signal output end can transmit the angle signal generated by the magnetic sensitive ring to the receiving unit;

[0009] The receiving unit stores the corresponding relationship between the angle signal and the rotation angle information of the extruder, and the receiving unit can obtain the rotation angle information of the extruder based on the received angle signal.

[0010] In a possible design, the support unit and the angle measuring unit are rotatably connected.

[0011] In a possible design, the material of the magnetic sensitive ring is semiconductor magnetic sensitive material.

[0012] In one possible design, the cross section of the housing is circular.

[0013] In one possible design, the signal output terminal is a wireless signal transmitting terminal;

[0014] The receiving unit comprises: a wireless signal receiving end;

[0015] The wireless signal transmitting end can transmit the angle signal to the wireless signal receiving end.

[0016] In one possible design, the angle measurement unit further includes: a housing;

[0017] The outer shell is fixed on the top of the extruder, and the housing and the wireless signal transmitting end are accommodated in the outer shell.

[0018] In one possible design, a dustproof cover is provided on the wireless signal receiving end.

[0019] In a possible design, the signal output terminal of the angle measurement unit and the receiving unit are electrically coupled via a cable.

[0020] In one possible design, the receiving unit includes: a display module for displaying the rotation angle information of the extruder.

[0021] In a possible design, the receiving unit can also obtain the rotation speed of the extruder based on the rotation angle information of the extruder and the corresponding time.

[0022] On the one hand, a method for measuring the rotation angle of an extruder is provided, and the method is applied to a device for measuring the rotation angle of an extruder provided in any of the possible designs described above, and the method comprises:

[0023] Based on the support and fixation of the support unit, the extrusion and expansion machine is installed into the pile hole to be extruded and expanded;

[0024] During the rotation of the extruder, the magnetic sensitive ring transmits the angle signal to the receiving unit;

[0025] The receiving unit obtains the rotation angle information of the extruder based on the received angle signal.

[0026] The technical solution provided by the embodiment of the present application is to set the angle measuring unit between the supporting unit and the extruder, and the angle measuring unit and the extruder can rotate synchronously. Since there is a magnetic field on the surface of the earth, and the direction of the magnetic lines of force of the magnetic field always remains from north to south, when in use, direct current is passed through the magnetic sensitive ring. When the extruder drives the angle measuring unit to rotate, the energized magnetic sensitive ring cuts the magnetic lines of force at different positions, which will generate electromotive forces of different sizes. Therefore, the electromotive force can reflect the size of the angle rotated by the magnetic sensitive ring. By transmitting the electromotive force as an angle signal to the receiving unit, the receiving unit can quickly obtain the rotation angle information of the extruder based on the angle signal, with a small error and without the need for manual operation by technical personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a structural schematic diagram of a device for measuring the rotation angle of an extruder provided in an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the main structure of an angle measurement unit 3 provided in an embodiment of the present application;

[0030] Figure 3 is a schematic diagram of a top view structure of an angle measurement unit 3 provided in an embodiment of the present application;

[0031] Figure 4 It is a flow chart of a method for measuring the rotation angle of an extruder provided in an embodiment of the present application;

[0032] Figure 5 It is a structural diagram of a computer device provided in an embodiment of the present application.

[0033] The reference numerals of the components in the accompanying drawings are as follows:

[0034] 1- Extrusion and expansion machine;

[0035] 2-Support unit;

[0036] 3- Angle measurement unit;

[0037] 31-housing;

[0038] 32-central axis;

[0039] 33-magnetic sensitive ring;

[0040] 34- signal output terminal;

[0041] 35-housing;

[0042] 4- receiving unit;

[0043] 41- wireless signal receiving end;

[0044] 42-Display module. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0046] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] Figure 1 is a schematic diagram of the structure of a device for measuring the rotation angle of an extruder provided in an embodiment of the present application; see Figure 1 The measuring device comprises: an extruder 1, a support unit 2, an angle measuring unit 3 and a receiving unit 4; the support unit 2, the angle measuring unit 3 and the extruder 1 are sequentially connected from top to bottom, and the angle measuring unit 3 and the extruder 1 can rotate synchronously, the extruder 1 is used to be installed in the pile hole to be extruded, the support unit 2 is located on the ground above the pile hole, and the support unit 2 is used to support the extruder 1; the angle measuring unit 3 comprises: a housing 31, a central shaft 32, a magnetic sensitive ring 33 and a signal output terminal 34 (see Figure 2 and Figure 3 ), the central axis 32 and the magnetic sensitive ring 33 are both located in the inner cavity of the housing 31, the central axis 32 passes through the magnetic sensitive ring 33 at the symmetry axis position of the magnetic sensitive ring 33, and the two ends of the central axis 32 are fixed on the top wall and the bottom wall of the housing 31; the two intersections of the magnetic sensitive ring 33 and the central axis 32 are respectively connected to the positive and negative poles of the DC power supply (see Figure 2 a and b) in the figure, so that an angle signal can be generated during the rotation of the magnetic sensitive ring 33. The magnetic sensitive ring 33 is connected to the signal output terminal 34, and the signal output terminal 34 can transmit the angle signal generated by the magnetic sensitive ring 33 to the receiving unit 4; the receiving unit 4 stores the corresponding relationship between the angle signal and the rotation angle information of the extruder 1, and the receiving unit 4 can obtain the rotation angle information of the extruder 1 based on the received angle signal.

[0048] The working principle of the measuring device is described in detail below:

[0049] In the above-mentioned measuring device, the extruder 1 is used to extrude and expand a disc-shaped groove in the pile hole, and the function of the support unit 2 is to support and fix the extruder 1 during the downward movement, extrusion and rotation of the extruder 1, and the angle measurement unit 3 can measure the rotation angle information of the extruder 1, and output the rotation angle information through the receiving unit 4 for the technician to obtain. Among them, the receiving unit 4 can output the rotation angle information in a variety of different ways, such as: directly displaying it, broadcasting it through sound, or outputting it in other ways, which is not limited in this embodiment.

[0050] Figure 2 is a schematic diagram of the main structure of an angle measurement unit 3 provided in an embodiment of the present application, Figure 3 is a schematic diagram of a top view of an angle measurement unit 3 provided in an embodiment of the present application, see Figure 2 and Figure 3 , wherein the magnetic sensitive ring 33 is a high-performance integrated magnetic sensitive element, electrically coupled to the integrated circuit, and the two intersections of the magnetic sensitive ring 33 and the central axis 32 are respectively connected to the positive and negative poles of the DC power supply (see Figure 2 a and b), when the magnetic sensitive ring 33 rotates in the magnetic field, it cuts the magnetic lines of force, that is, the magnetic flux of the earth's magnetic field passing through the magnetic sensitive ring 33 changes, generating a small electromotive force (see Figure 2c or d), the electromotive force, as an angle signal, can reflect the size of the angle through which the magnetic sensitive ring 33 has rotated. There is a physical serial port between the magnetic sensitive ring 33 and the signal output terminal 34, so that the angle signal generated in the magnetic sensitive ring 33 can be transmitted to the signal output terminal 34, and then the signal output terminal 34 transmits the angle signal to the receiving unit 4. In the receiving unit 4, the correspondence between the angle signal and the rotation angle information of the extruder 1 is stored. The correspondence can be the correspondence between the angle signal obtained based on previous rotation experience and the rotation angle information of the extruder 1, or it can be the height of the extruder obtained by calculating the angle signal, the magnetic field signal, the size of the magnetic sensitive ring 33 and the rotation speed of the magnetic sensitive ring 33. This embodiment does not limit this. Based on the above characteristics, the receiving unit 4 can obtain the rotation angle information of the extruder 1 based on the received angle signal. The technicians of the construction work judge whether the extruder 1 has rotated into place according to the rotation angle information.

[0051] The device for measuring the rotation angle of an extruder provided in the embodiment of the present application is configured such that an angle measuring unit 3 is arranged between a supporting unit 2 and an extruder 1, and the angle measuring unit 3 and the extruder 1 can rotate synchronously. Since there is a magnetic field on the surface of the earth, and the direction of the magnetic lines of force of the magnetic field always remains from north to south, when in use, direct current is passed through the magnetic sensitive ring 33. When the extruder 1 drives the angle measuring unit 3 to rotate, the energized magnetic sensitive ring 33 cuts the magnetic lines of force at different positions, generating electromotive forces of different sizes. Therefore, the electromotive force can reflect the size of the angle through which the magnetic sensitive ring 33 has rotated. By transmitting the electromotive force as an angle signal to the receiving unit 4, the receiving unit 4 can quickly obtain the rotation angle information of the extruder 1 based on the angle signal, with a small error and without the need for manual operation by a technician.

[0052] Among them, the angle measurement unit 3 utilizes the non-contact sensing characteristics of the magnetic sensitive ring 33, and cooperates with the receiving unit 4 to obtain the rotation angle information of the extruder 1. It has the characteristics of non-contact and frictionless, high reliability, and long service life. It is widely used in occasions with frequent mechanical changes, harsh environments, long service life, and high reliability.

[0053] The following is a detailed description of the structure and working principle of each part of the measuring device:

[0054] The working process of the extruder 1 includes: when descending to the first preset support plate position in the pile hole, it stops descending. Since the width of the bow pressure arm of the extruder 1 is limited, it is necessary to rotate at different angles so that the bow pressure arm can fully extrude and expand the inner wall of the pile hole, thereby extrude and expand a disc-shaped groove. After that, the extruder 1 is moved to the second preset support plate position, and the above-mentioned extrusion and expansion process is repeated to extrude and expand the disc-shaped groove again. Among them, the second preset support plate position can be above or below the first preset support plate position, and this embodiment does not limit this.

[0055] In a possible design, the bow pressure arm of the extruder 1 is driven by a hydraulic cylinder, and the function of the hydraulic cylinder is to press the top plate of the bow pressure arm from top to bottom, thereby opening the bow pressure arm.

[0056] In a possible design, the support unit 2 and the angle measuring unit 3 are rotatably connected so that the angle measuring unit 3 and the extruder 1 as a whole can rotate relative to the support unit 2, thereby improving the flexibility of the device.

[0057] In a possible design, the support unit 2 and the angle measuring unit 3 may also be fixedly connected to facilitate controlling the rotation of the angle measuring unit 3 and the extruder 1 through the support unit 2 .

[0058] In one possible design, the material of the magnetic sensitive ring 33 is a semiconductor magnetic sensitive material, which has the advantages of simple structure, small size, easy integration, impact resistance, wide frequency response (from DC to microwave), large dynamic range, and can achieve non-contact detection, no wear, anti-pollution, no sparks, safe use, and long life. Therefore, it is widely used in measurement technology, automatic control and information processing.

[0059] In a possible design, the cross-section of the shell 31 is circular, which is compatible with the top shape of the extruder 1 and is easy to install.

[0060] In a possible design, the signal output terminal 34 is a wireless signal transmitting terminal; the receiving unit 4 includes: a wireless signal receiving terminal 41; the wireless signal transmitting terminal can transmit the angle signal to the wireless signal receiving terminal 41.

[0061] Based on the above structure, the angle signal is transmitted by wireless transmission. The above structure facilitates setting the receiving unit 4 at a position on the ground far away from the pile hole, so that the technician can remotely observe the rotation angle information; the above structure also facilitates setting the receiving unit 4 as a handheld device, so that the technician can also remotely observe the rotation angle information in real time during the inspection process.

[0062] In a possible design, the angle measuring unit 3 further includes: a housing 35; the housing 35 is fixed to the top of the extruder 1, and the housing 31 and the wireless signal transmitting end are accommodated in the housing 35, so that the parts of the angle measuring unit 3 can be formed into a whole, so as to modularly install and disassemble the angle measuring unit 3 in the measuring device. Furthermore, the housing 35 can also be used to accommodate other electrical equipment. The angle measuring unit 3 is not affected by harsh working conditions such as open air or large vibrations, so that the environmental adaptability of the measuring device is strong.

[0063] In a possible design, a dustproof cover is provided on the wireless signal receiving end 41 to prevent sludge from covering the wireless signal transmitting end.

[0064] In a possible design, the signal output terminal 34 of the angle measurement unit 3 and the receiving unit 4 are electrically coupled via a cable, thereby ensuring the stability and reliability of signal transmission between the angle measurement unit 3 and the receiving unit 4 .

[0065] In the measuring device, the receiving unit 4 can output the rotation angle information in a variety of different ways. In one possible design, the receiving unit 4 includes: a display module 42 for displaying the rotation angle information of the extrusion machine 1, and for displaying the rotation angle information of the extrusion unit.

[0066] The display module 42 may display the angle of the squeezing and expanding unit relative to an initial position, or may display the angle of the squeezing and expanding unit relative to a preset position, which is not limited in this embodiment.

[0067] In a possible design, the receiving unit 4 can also obtain the rotation speed of the extruder 1 based on the rotation angle information of the extruder 1 and the corresponding time, so that the technician can control the rotation process of the extruder unit.

[0068] All the above optional technical solutions can be arbitrarily combined to form optional embodiments of the present application, which will not be described one by one here.

[0069] The device for measuring the rotation angle of an extruder provided in the embodiment of the present application is configured such that an angle measuring unit 3 is arranged between a supporting unit 2 and an extruder 1, and the angle measuring unit 3 and the extruder 1 can rotate synchronously. Since there is a magnetic field on the surface of the earth, and the direction of the magnetic lines of force of the magnetic field always remains from north to south, when in use, direct current is passed through the magnetic sensitive ring 33. When the extruder 1 drives the angle measuring unit 3 to rotate, the energized magnetic sensitive ring 33 cuts the magnetic lines of force at different positions, generating electromotive forces of different sizes. Therefore, the electromotive force can reflect the size of the angle through which the magnetic sensitive ring 33 has rotated. By transmitting the electromotive force as an angle signal to the receiving unit 4, the receiving unit 4 can quickly obtain the rotation angle information of the extruder 1 based on the angle signal, with a small error and without the need for manual operation by a technician.

[0070] Among them, the angle measurement unit 3 utilizes the non-contact sensing characteristics of the magnetic sensitive ring 33, and cooperates with the receiving unit 4 to obtain the rotation angle information of the extruder 1. It has the characteristics of non-contact and frictionless, high reliability, and long service life. It is widely used in occasions with frequent mechanical changes, harsh environments, long service life, and high reliability. Based on the angle measurement unit 3, the measuring device can accurately measure the rotation angle of the extruder 1, greatly saving the time for measuring the angle. Since the angle data is more accurate, the working error is reduced, and the working efficiency of the support plate of the extruder 1 is effectively improved. The measuring device has a simple structure, is easy to install and use, and has a low manufacturing cost.

[0071] Figure 4 This is a flow chart of a method for measuring the rotation angle of an extruder provided in an embodiment of the present application. The method can be applied to computer equipment. Figure 4 The measuring method is applied to a measuring device for the rotation angle of an extruder provided in any of the above possible designs, and the measuring method comprises:

[0072] 401. Based on the support and fixation of the support unit 2, the extrusion and expansion machine 1 is installed into the pile hole to be extruded and expanded.

[0073] When the extruder 1 descends in the pile hole to the first preset support plate position, it stops descending. Since the width of the bow pressure arm of the extruder 1 is limited, it is necessary to rotate at different angles so that the bow pressure arm can fully extrude and expand the inner wall of the pile hole, thereby extruding and expanding a disc-shaped groove.

[0074] After the first preset support plate, the extruder 1 is moved to the second preset support plate position, and the above extrusion process is repeated to extrude and expand the disc-shaped groove again. The second preset support plate position can be above or below the first preset support plate position, which is not limited in this embodiment.

[0075] 402. During the rotation of the extruder 1, the magnetic sensitive ring 33 transmits the angle signal to the receiving unit 4.

[0076] In this step, the magnetic sensitive ring 33 is used to transmit the angle signal to the receiving unit 4 in real time, thereby ensuring the continuity of the signal.

[0077] 403. The receiving unit 4 obtains the rotation angle information of the extruder 1 based on the received angle signal.

[0078] In the measuring device, in the receiving unit 4, the correspondence between the angle signal and the rotation angle information of the extruder 1 is stored. The correspondence can be the correspondence between the angle signal obtained based on previous rotation experience and the rotation angle information of the extruder 1, or it can be the height of the extrusion unit calculated by the angle signal, the magnetic field signal, the size of the magnetic sensitive ring 33 and the rotation speed of the magnetic sensitive ring 33. This embodiment does not limit this.

[0079] The method for measuring the rotation angle of an extruder provided in an embodiment of the present application is such that the angle measuring unit 3 is arranged between the supporting unit 2 and the extruder 1, and the angle measuring unit 3 and the extruder 1 can rotate synchronously. Since there is a magnetic field on the surface of the earth, and the direction of the magnetic lines of force of the magnetic field always remains from north to south, when in use, direct current is passed through the magnetic sensitive ring 33. When the extruder 1 drives the angle measuring unit 3 to rotate, the energized magnetic sensitive ring 33 cuts the magnetic lines of force at different positions, and electromotive forces of different sizes are generated. Therefore, the electromotive force can reflect the size of the angle rotated by the magnetic sensitive ring 33. By transmitting the electromotive force as an angle signal to the receiving unit 4, the receiving unit 4 can quickly obtain the rotation angle information of the extruder 1 based on the angle signal, with a small error and without the need for manual operation by technicians.

[0080] Among them, the angle measurement unit 3 utilizes the non-contact sensing characteristics of the magnetic sensitive ring 33, and cooperates with the receiving unit 4 to obtain the rotation angle information of the extruder 1. It has the characteristics of non-contact and frictionless, high reliability, and long service life. It is widely used in occasions with frequent mechanical changes, harsh environments, long service life, and high reliability.

[0081] Figure 5 It is a structural diagram of a computer device provided in an embodiment of the present application. The computer device 500 may have relatively large differences due to different configurations or performances, and may include one or more processors (central processing units), CPU501 and one or more memories 502, wherein the memory 502 stores at least one program code, and the at least one program code is loaded and executed by the processor 501 to implement the measurement method of the rotation angle of the extruder provided in the above-mentioned various method embodiments. Of course, the computer device may also have components such as a wired or wireless network interface, a keyboard, and an input and output interface for input and output. The computer device may also include other components for realizing the functions of the device, which will not be described in detail here.

[0082] In some embodiments, the computer program involved in the embodiments of the present application may be deployed and executed on a computer device, or on multiple computer devices located at one location, or on multiple computer devices distributed at multiple locations and interconnected by a communication network. Multiple computer devices distributed at multiple locations and interconnected by a communication network may constitute a blockchain system.

[0083] In an exemplary embodiment, a computer-readable storage medium is also provided, such as a memory including a program code, and the program code can be executed by a processor in a computer device to complete the method for measuring the rotation angle of the extruder in the above embodiment. For example, the computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (Compact Disc Read-Only Memory), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device.

[0084] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program. The above program may be stored in a computer-readable storage medium, and the above storage medium may be a read-only memory, a disk or an optical disk, etc.

[0085] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A device for measuring the rotation angle of an extruder, characterized in that: The measuring device comprises: an extruder (1), a support unit (2), an angle measuring unit (3) and a receiving unit (4); The support unit (2), the angle measuring unit (3) and the extrusion machine (1) are connected in sequence from top to bottom, and the angle measuring unit (3) and the extrusion machine (1) can rotate synchronously. The extrusion machine (1) is used to be installed in a pile hole to be extruded and expanded. The support unit (2) is located on the ground above the pile hole. The support unit (2) is used to support the extrusion machine (1); The angle measurement unit (3) comprises: a housing (31), a central axis (32), a magnetic sensitive ring (33) and a signal output end (34); the central axis (32) and the magnetic sensitive ring (33) are both located in an inner cavity of the housing (31); the central axis (32) passes through the magnetic sensitive ring (33) at a symmetric axis position of the magnetic sensitive ring (33); and two ends of the central axis (32) are fixed to the top wall and the bottom wall of the housing (31); The two points where the magnetic sensitive ring (33) intersects with the central axis (32) are respectively connected to the positive pole and the negative pole of a direct current power supply. When the magnetic sensitive ring (33) rotates in the magnetic field, it cuts the magnetic lines of force, and the magnetic flux of the earth's magnetic field passing through the magnetic sensitive ring (33) changes, generating a small electromotive force. The electromotive force is an angle signal generated during the rotation of the magnetic sensitive ring (33). The electromotive force can reflect the size of the angle through which the magnetic sensitive ring (33) rotates. The magnetic sensitive ring (33) is connected to the signal output end (34), and the signal output end (34) can transmit the angle signal generated by the magnetic sensitive ring (33) to the receiving unit (4); The receiving unit (4) stores a correspondence between the angle signal and the rotation angle information of the extrusion and expansion machine (1), and the receiving unit (4) can obtain the rotation angle information of the extrusion and expansion machine (1) based on the received angle signal.

2. The measuring device according to claim 1, characterized in that The support unit (2) and the angle measuring unit (3) are rotatably connected.

3. The measuring device according to claim 1, characterized in that The material of the magnetic sensitive ring (33) is a semiconductor magnetic sensitive material.

4. The measuring device according to claim 1, characterized in that The cross section of the shell (31) is circular.

5. The measuring device according to claim 1, characterized in that The signal output end (34) is a wireless signal transmitting end; The receiving unit (4) comprises: a wireless signal receiving terminal (41); The wireless signal transmitting end is capable of transmitting the angle signal to the wireless signal receiving end (41).

6. The measuring device according to claim 5, characterized in that The angle measurement unit (3) further comprises: a housing (35); The outer shell (35) is fixed on the top of the extruder (1), and the housing (31) and the wireless signal transmitting end are accommodated in the outer shell (35).

7. The measuring device according to claim 1, characterized in that The signal output end (34) of the angle measurement unit (3) and the receiving unit (4) are electrically coupled via a cable.

8. The measuring device according to claim 1, characterized in that The receiving unit (4) comprises: a display module (42) for displaying the rotation angle information of the extrusion and expansion machine (1).

9. The measuring device according to claim 1, characterized in that The receiving unit (4) can also obtain the rotation speed of the extrusion machine (1) based on the rotation angle information of the extrusion machine (1) and the corresponding time.

10. A method for measuring the rotation angle of an extruder, characterized in that: The measuring method is applied to the measuring device for the rotation angle of the extruder according to any one of claims 1 to 9, and the measuring method comprises: Based on the support and fixation of the support unit (2), the extrusion and expansion machine (1) is installed in the pile hole to be extruded and expanded; During the rotation of the extruder (1), the magnetic sensitive ring (33) transmits an angle signal to a receiving unit (4); The receiving unit (4) acquires the rotation angle information of the extrusion and expansion machine (1) based on the received angle signal.

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