Split type displacement measurement grating ruler assembly structure

Abstract

The utility model discloses a split type displacement measurement grating ruler assembly structure, which comprises a data sensing head and equipment with a mounting plane, a grating ruler body is arranged on the mounting plane, the grating ruler body comprises a substrate and a grating belt, the substrate is made of an insulating material and is fixedly assembled on the mounting plane, and the grating belt is fixedly assembled on the data sensing head. The grid belt is of a long-strip-shaped sheet structure, grids are formed in the length direction of the grid belt in an array mode, and the grid belt is fixedly connected to the substrate in a pasting mode. And the data sensing head is not in contact with the grating ruler body. The induction target grid band has the advantages that the induction target grid band can be manufactured into a thin film shape, the body is light and small, the induction target grid band can be directly pasted on non-metal materials such as a glass curtain wall and can also be attached to metal through the insulation base body, and therefore the induction target grid band is suitable for widely detecting environments and objects.

Description

TECHNICAL FIELD

[0001] The utility model relates to displacement sensor technical field, concretely relates to a split type displacement measurement grating ruler assembly structure. BACKGROUND

[0002] Displacement sensor is a kind of instrument for measuring the position change or displacement of object, and it is divided into resistance displacement sensor, capacitance displacement sensor, inductance displacement sensor, photoelectric displacement sensor and ultrasonic displacement sensor according to different principles. After long-term development, the performance of the existing sensor has almost reached the development limit. In the pursuit of higher measurement accuracy, wider application range and more convenient installation and maintenance, these traditional sensors face insurmountable technical bottlenecks, and it is difficult to achieve more significant technical breakthroughs.

[0003] Therefore, the applicant launches a new type of displacement sensor based on the principle of mutual inductance electromotive force change. The physical principle of this kind of sensor is that a primary coil and a secondary coil are arranged in the inductive head, and when an oscillating current is passed, a mutual inductance electromotive force is generated between the primary and secondary coils. When a metal target element approaches, the electromagnetic field of the two coils is disturbed, and the mutual inductance electromotive force changes. This change is mainly related to the gap between the target element and the coil and the projection coverage area of the target element. Based on this principle, if the secondary coil is printed as a function type coil, the target element adopts a long strip grating ruler, and the grating is arranged on the grating ruler in an array, when the primary and secondary coils move linearly relative to the long strip grating ruler, since the grating is equivalent to reducing the thickness of the metal material of the grating ruler at this position, the mutual inductance electromotive force between the inductive coils is definitely different when the inductive head passes through the grating position and the non-grating position. Therefore, during the movement of the inductive head along the length direction of the grating ruler, the mutual inductance electromotive force between the inductive coils can change with the arrangement rule of the grating, and then the displacement can be obtained by converting the mutual inductance electromotive force change.

[0004] In the above newly developed and designed displacement sensor, the long strip grating ruler of the target element at least needs to include a grating belt and a substrate located at the bottom of the grating belt. According to the traditional sensor grating ruler installation method, the grating belt and the substrate are usually integrally installed on the equipment. This integrated installation method has many disadvantages. On the one hand, due to the limitation of the overall structure, when the installation plane is made of different materials, especially when it comes to the installation of some special materials, the application of the overall grating ruler will be greatly limited. For example, if the installation plane is made of metal, the overall grating ruler may have signal interference and other problems due to material compatibility problems under complex working conditions. On the other hand, the length of the grating ruler is often long, therefore, the grating belt and the substrate at the bottom need to be manufactured with the same length, which has the disadvantages of difficult production, high cost and poor flexibility in later assembly in the equipment. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a split type displacement measurement grating assembly structure to solve the technical defects of the whole grating.

[0006] To achieve the above object, the utility model technical scheme is as follows:

[0007] A split type displacement measurement grating assembly structure, the key lies in, including the equipment with the installation plane, the installation plane is provided with grating body, the grating body includes the base plate and the grid belt, the base plate adopts the insulating material to make, the base plate is fixedly assembled on the installation plane, the grid belt is long strip type sheet structure, the length direction is arrayed with the grid, the grid belt is fixedly connected on the base plate in the pasting mode.

[0008] With the above structure, since the base plate is made of insulating material, it can effectively isolate the inductive interference that the metal installation plane may generate, so the grid belt can be applied to any material equipment, whether it is metal or non-metal equipment, can be installed, effectively expanding the application range of the grid belt.

[0009] As preferred: the base plate length is less than the grid belt length, the base plate quantity is not less than two, and each base plate is arrayed under the grid belt in the length direction. With the above structure, the production length of the base plate is reduced, making the base plate more easily packaged and transported, thereby reducing transportation cost and damage risk, having the advantage of convenient transportation.

[0010] As preferred: the base plate is an elastic insulating plate, and / or the equipment is provided with a groove at the position corresponding to the installation plane, and the grating body is partially or entirely embedded in the groove. With the above structure, the base plate can adapt to the possible slight unevenness of the installation plane by its own elasticity, reducing the measurement error caused by the installation surface defects, and ensuring the accuracy of measurement.

[0011] As preferred: the base plate is fixedly installed on the installation plane in the form of threaded fastener or pasting or magnetic attraction. With the above structure, it is convenient to install.

[0012] As preferred: the upper side of the grid belt is covered with a plastic protective layer. With the above structure, the grid belt is protected.

[0013] As preferred: the grid belt is attached to the base plate by double-sided adhesive tape. With the above structure, the close attachment of the grid belt and the base plate can be ensured.

[0014] As preferred: the grid belt is a stainless steel belt, and the grid is a through hole formed in the stainless steel belt.

[0015] As preferred: the grid belt can be rolled up.

[0016] As preferred: the device is a machine tool or a coordinate measuring instrument or a glass curtain wall.

[0017] As preferred: the device is further provided with a moving part capable of moving relative to the mounting plane, a sensor reader is fixedly installed on the moving part, and the sensor reader is arranged opposite to the grating body; the sensor reader is internally arranged with a primary coil and a secondary coil, the secondary coil is located in the primary coil, and when an oscillating current is applied to the primary coil, a mutual inductive electromotive force can be generated between the primary coil and the secondary coil; the length ratio between the grating and the metal segment between the grating and the metal segment is 3:1 or 1:3. With the above structure, during the reciprocating movement of the sensor reader relative to the grating body, the primary coil is kept powered, and the mutual inductive electromotive force between the primary coil and the secondary coil at the grating position changes in a sinusoidal manner, that is, the mutual inductive electromotive force changes with the displacement of the grating. Therefore, during the movement of the sensor reader along the length direction of the grid belt, the displacement of the sensor reader can be obtained by converting the change rule of the mutual inductive electromotive force, so that the displacement measurement of the target product is realized.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] 1. The split type displacement measurement grating assembly structure provided by the utility model can effectively isolate the inductive interference that may be generated by the metal mounting plane, so that the grid belt can be applied to any device regardless of metal or non-metal, and the application range of the grid belt is effectively expanded.

[0020] 2. The split type displacement measurement grating assembly structure provided by the utility model can independently produce the substrate and the grid belt during the production and manufacturing of the grating, and after being delivered to the end user, the substrate is fixed on the device, and the grid belt is pasted to complete the installation, which has the technical advantage of convenient installation and use.

[0021] 3. The split type displacement measurement grating assembly structure provided by the utility model is provided with an elastic insulating strip, which can adapt to the slight unevenness of the mounting plane by its own elasticity, reduce the measurement error caused by the defects of the mounting surface, and ensure the accuracy of the measurement.

[0022] 4. The split displacement measurement grating assembly structure has the advantages of convenient transportation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Figure 4 is an exploded view of the split displacement measurement grating assembly structure;

[0024] Figure 2 Figure 3 is a front view of the grating belt 3;

[0025] Figure 3 Figure 6 is a cross-sectional view of the split displacement measurement grating assembly structure;

[0026] Figure 4 Figure 5 is a use reference view of the split displacement measurement grating assembly structure;

[0027] Figure 5 Figure 7 is a schematic view of the inductor read head 6 and the grating body A in displacement measurement. DETAILED DESCRIPTION

[0028] The utility model will be further described below in combination with the embodiments and drawings.

[0029] As shown in Figure 1 and Figure 3 , a split displacement measurement grating assembly structure comprises an equipment 1, which has a mounting plane 1a, and the mounting plane 1a is provided with a grating body A. Specifically, the grating body A comprises a substrate 2 and a grating belt 3, that is, the substrate 2 and the grating belt 3 are independently produced and installed. Wherein, the substrate 2 is made of insulating material, and the substrate 2 is fixedly assembled on the mounting plane 1a. From Figure 2 It can be seen that the grating belt 3 is in a long strip-shaped structure, and a plurality of grids 3a are arranged in the length direction of the grating belt 3, and each grid 3a has a metal segment 3b between two adjacent grids 3a. In this embodiment, the grating belt 3 is fixedly connected to the substrate 2 in a pasting manner, which has the advantages of simple operation and good fixing effect.

[0030] Based on the above structural design, the split displacement measurement grating assembly structure provided by the embodiment has the following advantages: since the substrate 2 is made of insulating material, it can effectively isolate the inductive interference that may be generated by the metal mounting plane la, so the grating belt 3 can be applied to any equipment 1 regardless of metal or non-metal equipment 1, and can be installed and adapted, effectively expanding the application range of the grating belt 3. At the same time, the substrate 2 and the grating belt 3 are two independent components, so the substrate 2 and the grating belt 3 have more flexibility in manufacturing and assembly. During the production and manufacturing of the grating, the substrate 2 and the grating belt 3 can be independently produced, and after being delivered to the end user, the substrate 2 is fixed on the equipment 1, and then the grating belt 3 is pasted to complete the installation, which has the technical advantage of convenient installation and use.

[0031] Further, as shown in Figure 1 In the embodiment, the substrate 2 can be made in multiple sections, that is, the length of a single substrate 2 is less than the length of the grating belt 3, and the number of substrates 2 is not less than two. During assembly, each substrate 2 is arrayed in sequence along the length direction under the grating belt 3. This design reduces the production length of the substrate 2, making it easier to package and transport, thereby reducing transportation costs and damage risks, and having the advantage of convenient transportation.

[0032] In the embodiment, the substrate 2 is an elastic insulating plate, which can adapt to the possible slight unevenness of the mounting plane la by its own elasticity, reducing the measurement error caused by the defects of the mounting surface and ensuring the accuracy of the measurement.

[0033] To ensure the stability of the grating body A installation, the equipment 1 is provided with a groove at the position corresponding to the mounting plane la, and the grating body A is partially or entirely embedded in the groove.

[0034] According to different use scenarios, the substrate 2 can be fixed and installed on the mounting plane la by means of threaded fasteners, or the substrate 2 can be fixed and installed on the mounting plane la by means of adhesion, or the substrate 2 can be fixed and installed on the mounting plane la by means of magnetic attraction. The above-mentioned methods have the advantages of convenient installation and strong applicability.

[0035] Please refer to Figure 3 and 4 The upper side of the grating belt 3 is covered with a plastic protective layer 4, which can protect the grating belt 3 and also enhance the insulation of the grating belt 3, further eliminating the influence of external inductive interference on the measurement of the grating belt 3, and ensuring the accuracy and reliability of the measurement.

[0036] In the embodiment, the grating belt 3 is attached to the substrate 2 by double-sided tape, which can ensure the close attachment of the grating belt 3 to the substrate 2, and the installer can quickly and accurately fix the grating belt 3 to the substrate 2 during assembly.

[0037] Please refer toFigure 2 and 3 In the embodiment, the grid belt 3 is a stainless steel continuous grid belt, and the grid 3a is a through hole a formed on the stainless steel belt. Further, the grid belt 3 can be rolled up. During transportation, the grid belt 3 can be rolled up to reduce the occupied space, reduce the transportation risk, and ensure the quality of the grid belt 3.

[0038] In the embodiment, the device 1 is a machine tool or a coordinate measuring instrument or a glass curtain wall. The embodiment takes the machine tool as an example for description. Figure 4 The device 1 is further provided with a moving part 5 capable of moving relative to the mounting plane 1a. The inductor read head 6 is fixedly installed on the moving part 5, and the inductor read head 6 is arranged opposite to the grid body A and is capable of moving relative to the length direction of the grid body A. The grid body A and the inductor read head 6 constitute a displacement sensor. The machine tool works, the moving part 5 moves, and the inductor read head 6 and the grid body A can accurately measure the displacement data of the moving part 5, thereby ensuring the machining accuracy.

[0039] Specifically, in combination with Figure 2 and Figure 5 It is shown that two sensing coils are arranged in the inductor read head 6, which are a primary coil 61 and a secondary coil 62. The secondary coil 62 is a sine coil, which is located in the primary coil 61. When an oscillating current is applied to the primary coil 61, a mutual inductive electromotive force can be generated between the primary coil 61 and the secondary coil 62.

[0040] Based on this, the working principle of the above-mentioned displacement sensor is that: when the device 1 works, the primary coil 61 is kept powered, and during the reciprocating movement of the inductor read head 6 relative to the grid body A, the mutual inductive electromotive force between the primary coil 61 and the secondary coil 62 at the grid 3a position has a mutual inductive electromotive force, and the mutual inductive electromotive force of the remaining part is shielded by the metal segment 3b. Again, since the secondary coil 62 is a sine coil, during the movement of the inductor read head 6 relative to the grid 3a, the mutual inductive electromotive force between the primary coil 61 and the secondary coil 62 also changes in a sine law, that is, the mutual inductive electromotive force changes with the displacement of the grid 3a. Therefore, during the movement of the inductor read head 6 along the length direction of the grid belt 3, the displacement of the inductor read head 6 can be obtained by converting the change law of the mutual inductive electromotive force, so as to realize the displacement measurement of the target product.

[0041] The length ratio between the grid 3a and the metal segment 3b is 3:1 or 1:3. In the embodiment, the length ratio between the metal segment 3b and the adjacent grid 3a is 3:1, which is equivalent to 90 degrees of the 360-degree sine function, that is, 1 / 4. When the inductor read head 6 moves relative to the grid belt 3, the inductance change law of the secondary coil 62 in a single grid pitch period is a sine curve, which is beneficial to data collection.

[0042] Further, the inductor read head 6 is not in contact with the grid body A. Because the inductor read head 6 is not in contact with the grid body A, and there is no permanent magnet effect, the mechanical disturbance to the detection object is very small, and it is suitable for mechanical structures without backlash, and the detection of objects deformed due to gas or liquid flow. For example, the detection of displacement of a high-rise glass curtain wall deformed by wind pressure, the grid belt 3 is pasted on the surface to be measured, which can be the indoor side of the glass curtain wall, the inductor read head 6 is fixed to the indoor building structure, and the inductor read head 6 is opposite to the grid belt 3, then the real-time displacement value of the glass under wind pressure can be measured, and the grid belt 3 is pasted on the glass curtain wall in multiple axial directions, so that the displacement of the glass curtain wall in multiple axial directions can be measured. The grid belt 3 can be made into a thin film shape, the body is light and small, and can be directly pasted on the glass curtain wall and other non-metallic materials, in addition, it can also be attached to the metal through the insulating material substrate 2, so it is suitable for a wide range of detection environments and objects.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and those skilled in the art can make various similar expressions under the inspiration of the present application without violating the purpose and claims of the present application. Such changes fall within the scope of the present application.

Claims

1. A split displacement measurement grating assembly structure, characterized by, The utility model provides a device (1) with a mounting plane (1a), a grid ruler body (A) is arranged on the mounting plane (1a), the grid ruler body (A) comprises a base plate (2) and a grid belt (3), the base plate (2) is made of insulating material, the base plate (2) is fixedly assembled on the mounting plane (1a), the grid belt (3) is in long strip type sheet configuration, and the length direction is arrayed with grid (3a), and the grid belt (3) is fixedly connected on the base plate (2) in the way of sticking.

2. The split displacement measurement grating assembly of claim 1, wherein: The base plate (2) is less than the length of the grid belt (3), and the number of the base plate (2) is not less than two, and each base plate (2) is arrayed in sequence under the grid belt (3) along the length direction.

3. The split displacement measurement grating assembly of claim 1, wherein: The base plate (2) is an elastic insulating plate. And / or the device (1) is provided with a groove at the position corresponding to the mounting plane (1a), and the grid ruler body (A) is partially or wholly embedded in the groove.

4. The split displacement measurement grating assembly of claim 1, wherein: The base plate (2) is fixedly mounted on the mounting plane (1a) in the way of threaded fastener or sticking or magnetic attraction.

5. The split displacement measurement grating assembly of claim 1, wherein: The upper side of the grid belt (3) is covered with a plastic protective layer (4).

6. The split displacement measurement grating assembly of claim 1, wherein: The grid belt (3) is pasted on the base plate (2) through double-sided adhesive tape.

7. The split displacement measurement grating assembly of claim 1, wherein: The grid belt (3) is a stainless steel belt, and the grid (3a) is a through hole (a) formed in the stainless steel belt.

8. The split displacement measurement grating assembly of claim 1, wherein: The grid belt (3) can be rolled up and folded.

9. The split displacement measurement grating assembly of claim 1, wherein: The device (1) is a machining machine tool or a coordinate measuring instrument or a glass curtain wall.

10. The split displacement measurement grating assembly of claim 1, wherein: The device (1) is further provided with a moving part (5) capable of moving relative to the mounting plane (1a), a sensor reader (6) is fixedly mounted on the moving part (5), and the sensor reader (6) is arranged opposite to the grid ruler body (A); the sensor reader (6) is arranged with a primary coil (61) and a secondary coil (62), the secondary coil (62) is located in the primary coil (61), when an oscillating current is passed through the primary coil (61), a mutual inductance electromotive force can be generated between the primary coil (61) and the secondary coil (62); adjacent two grid (3a) have a metal segment (3b), and the length ratio between the grid (3a) and the metal segment (3b) is 3:1 or 1:3.

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