阅读说明：本技术 具高度方向运动感测件精准定位装置的振动量测组件 (Vibration measuring assembly with accurate positioning device of height direction movement sensing piece ) 是由 郑瑞煌 王荣升 于 2020-05-04 设计创作，主要内容包括：本发明公开了一种具高度方向运动感测件精准定位装置的振动量测组件,包括：本体,具有基准面和正交于基准面的正交设置面,正交设置面具有复数彼此远离的插入埠,且插入埠间的间距恰对应上述高度方向运动感测件外廓尺寸；电性焊固上述高度方向运动感测件的电路板；定位装置,包括：复数形状分别与插入埠互补且尺寸不小于上述对应的插入端口的固定单元,供迫紧结合至对应的插入埠；和一延伸出固定单元的迫紧基体,具有接近本体的对接面和相反于抵接面的背面,对接面上具有抵接部,供将电路板连同上述高度方向运动感测件抵接固持于迫紧基体和本体间。(The invention discloses a vibration measuring assembly with a height direction movement sensing part accurate positioning device, which comprises: a body having a reference surface and an orthogonal arrangement surface orthogonal to the reference surface, the orthogonal arrangement surface having a plurality of insertion ports spaced apart from each other, and a distance between the insertion ports corresponding to an overall dimension of the height direction motion sensing element; electrically welding the circuit board of the height direction motion sensing piece; a positioning device, comprising: a plurality of fixing units, each of which has a shape complementary to the insertion ports and a size not smaller than the corresponding insertion port, for being forcibly coupled to the corresponding insertion port; and a tightening base body extending out of the fixing unit and having a butting face close to the body and a back face opposite to the butting face, wherein the butting face is provided with a butting part for butting and fixing the circuit board and the height direction motion sensing piece between the tightening base body and the body.)

1. A vibration measurement assembly with a precise positioning device for a height direction movement sensing part is characterized by comprising

A body having at least a reference plane and an orthogonal setting plane orthogonal to the reference plane, wherein the orthogonal setting plane is formed with a plurality of insertion ports which are far away from each other, and a space corresponding to the outline size of the height direction motion sensing component is formed between the insertion ports;

at least one circuit board electrically soldered with the height direction motion sensing member; and

a positioning device includes:

plural fixing units, which are complementary to the insertion ports and have a size not smaller than the corresponding insertion ports, respectively, for being respectively corresponding to the insertion ports and being tightly combined to the corresponding insertion ports; and

a tightening base body extending out of the fixing unit and having a butt-joint surface close to the body and a back surface opposite to the butt-joint surface, at least a butt-joint part is formed on the butt-joint surface to make the fixing unit tightly combined to the corresponding inserting port respectively, the butt-joint part makes the circuit board and the height direction movement sensing piece butt-jointed and fixed between the tightening base body and the body.

2. The vibration measuring module with the precise positioning device for the height direction movement sensor according to claim 1, further comprising an orthogonal auxiliary unit interposed between the height direction movement sensor and the body, wherein the orthogonal auxiliary unit has an orthogonal mounting surface facing the height direction movement sensor and an embedding surface opposite to the orthogonal mounting surface.

3. The vibration measurement assembly with the precise positioning device of height direction movement sensor as claimed in claim 2, wherein the orthogonal mounting surface further forms an orthogonal compensation positioning port for the orthogonal auxiliary unit to be mounted on the orthogonal mounting surface and combined with the body.

4. The vibration measuring device with the accurate positioning apparatus of height direction movement sensor as claimed in claim 3, wherein said embedding surface has an oblique angle, and said orthogonal compensation positioning port has an orthogonal compensation surface formed thereon with a complementary angle to said embedding surface and complementary to said oblique angle, for said orthogonal auxiliary unit to be coupled with said body at said orthogonal compensation positioning port via said embedding surface and said orthogonal compensation surface so that said orthogonal mounting surface is orthogonal to said reference surface.

5. The assembly of claim 2, wherein the orthogonal auxiliary unit has a plurality of through holes corresponding to the insertion port and the fixing unit for the fixing unit to pass through and tightly engage with the insertion port.

6. The vibration measuring assembly with the precise positioning device for the height direction movement sensor as claimed in claim 1, wherein the plurality of insertion ports are different in size and are not symmetrical to each other.

7. The assembly of claim 1, wherein the abutment portion comprises at least 3 bumps of equal height.

Technical Field

The present invention relates to a vibration measuring assembly, and more particularly to a vibration measuring assembly having an accurate positioning device for a height-direction motion sensor.

Background

Any equipment that rotates about a center may be referred to as rotating equipment, small from what is commonly found in factories, including fans, motors, pumps, and compressors, up to the wind turbine shaft and the axles of agile trains that operate at high speeds. Since any rotating device cannot be perfectly round, and some reciprocating type of force is generated due to eccentric rotation to a certain extent during operation, the condition of the rotating device can be determined by monitoring the vibration behavior generated by the motion. For railway vehicle applications, vibration of a minimum of 1mG is periodically monitored, and transmission shaft breakage of a railway vehicle occurs, and the conventional aging threshold of component devices such as transmission shafts or gearboxes is limited to about 30 to 50mG of vibration, and the device must be replaced in advance before the device is broken down or damaged, so that derived financial loss or casualties are avoided.

The flight capacity of the airplane is that above a critical flight speed, the pressure difference caused by the different speeds of the airflow flowing through the lower surface and the upper surface of the wing is utilized to provide rising buoyancy larger than the weight of the airplane so as to enable the airplane to take off, however, the airflow in the natural environment is mostly turbulent, so the speed distribution of the airflow is very uneven, the pressure difference changes constantly, the rising buoyancy provided for the wing also changes constantly to cause the wing to vibrate constantly, the vibration directly affects the service life of the wing, the vibration of the wing is monitored constantly to find the problem of wing degradation in advance so as to be repaired in advance, so that the human life and property loss caused by great air crash are avoided, and the flight safety is the most important subject.

In addition, the convenience of providing traffic by bridges accelerates human-to-human communication to promote civilization development, because the structure of the bridge is not a perfect rigid body, the design must be able to withstand vibration caused by human and vehicle passing and various natural disasters besides a certain load limit, but the construction material of the bridge has a life-span structure which deteriorates year by year to cause a concern of traffic safety, so it is also necessary to perform real-time vibration monitoring on the bridge to find structural problems early to repair or evaluate, remove and reconstruct the bridge, thereby avoiding human life and financial loss caused by bridge collapse.

The current vibration monitoring is mainly to arrange a vibration sensing part on a main body to be monitored in time, then receive a vibration signal returned by the vibration sensing part, filter and calculate the monitoring data, and then provide professional technicians for judgment. The measuring capability of the sensing element is mainly defined by the precision and accuracy of the measured data, the price difference of the vibration sensing element with different precision and accuracy levels is very large, and with the increasing development and manufacturing of various new instruments, the requirements for the precision and accuracy of the vibration element in the market are higher and higher, and the requirements for the vibration sensing element with high precision and accuracy in the market are also increasing.

As shown in fig. 7, in the three-axis vibration sensor 9, an X-axis sensing chip 94 is disposed on a circuit board 92 to sense the vibration component in the X-axis direction, a Y-axis sensing chip 95 is disposed on the same plane to sense the vibration component in the Y-axis direction, a planarization layer 96 is disposed on the X-axis sensing chip 94 and the Y-axis sensing chip 95, and a Z-axis sensing chip 97 is disposed on the planarization layer 96 to sense the vibration component in the Z-axis direction. However, in general, for example, three-dimensional vibration sensing in a smart phone, on one hand, the occupied space is saved, and on the other hand, the cost is saved, and even the sensing chips in the Z-axis direction are simply stacked above the X-axis sensing chip 94 and the Y-axis sensing chip 95. Therefore, it is difficult to achieve complete leveling due to the height tolerance, so the Z-axis sensing chip 97 is prone to tilt, and therefore the accuracy of measurement in the Z-axis direction is usually not good, and fortunately, the smart phone does not have high requirements for precision between three dimensions, and therefore the above problems do not occur.

In addition, the output signal of the triaxial vibration sensor manufactured by Vibrasens company can reach 100 mV/G. It is explained above that the precision of the vibration sensor is determined by the sensing performance of the sensing module, and the accuracy is determined by the assembling mechanism and the process quality of the vibration sensor, even if the high-precision sensing module is used to manufacture the vibration sensor, if the mechanism is not properly designed or the sensing chip is installed on the sensing module during the manufacturing process, the component deviation between the height axis direction measurement data and the horizontal axis direction measurement data will be caused to lose the accuracy, and the credible digital number of the measurement data will be reduced to reduce the precision.

According to the current technology, the precision machining of general machine components can be accurate to, for example, one (0.01mm), so that the vertical Z-direction structure and the X-Y plane are perpendicular well, but even if only the screw rotates slightly or the amount of soldering tin is uneven during the process of connecting the circuit board mounted with the Z-axis direction vibration sensor to the Z-axis direction base structure, the inclination or the height deviation of the Z-axis direction vibration sensor is caused, and the error is often more than that of the precision machining. That is, even if a Z-axis vibration sensor with high accuracy is used and high-accuracy machining is used in manufacturing the base, a predetermined effect cannot be achieved when vibration in the Z-axis direction is actually measured, and accuracy on a larger scale is not good because of the presence of a high-accuracy component.

In addition, when monitoring the vibration of a large main body, a plurality of vibration sensors are usually required to be used at the same time, the accuracy and precision of each vibration sensor are inconsistent due to the above-mentioned problems of mechanism design and assembly and manufacturing, a user usually has to perform a complicated calibration procedure on each vibration sensor, and the vibration data measured by the plurality of vibration sensors must be calculated and processed and then analyzed by taking the least significant digit, which again reduces the accuracy and precision of the vibration sensors.

Therefore, it is an objective of the present invention to improve the accuracy of the vibration sensor by reducing the influence of manufacturing assembly offset through a perfect and simple mechanism design. In particular, the design of the structure can not cause the cost to be increased greatly, and the yield and the efficiency of assembly can not be influenced.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, it is desirable to provide a vibration measuring assembly having a precise positioning device for a height direction movement sensing member according to an embodiment of the present invention, which is intended to achieve the following objectives: (1) the vibration measuring device can provide accurate positioning in the height direction so as to reduce deviation in the manufacturing and assembling process, thereby improving the measuring accuracy of the vibration measuring component; (2) due to the improvement of the accuracy, the precision of the vibration sensing piece can be ensured to show the power, and the vibration measurement value is more sensitive and reliable; (3) the yield is improved by the simple assembly design.

According to an embodiment, the present invention provides a vibration measurement assembly having a precise positioning device for a height-direction motion sensor, comprising a body having at least a reference plane and an orthogonal plane orthogonal to the reference plane, wherein the orthogonal plane is formed with a plurality of insertion ports away from each other, and a space corresponding to the dimension of the height-direction motion sensor is formed between the insertion ports; at least one circuit board electrically soldered with the height direction motion sensing member; and a positioning device, comprising: plural fixing units, which are complementary to the insertion ports and have a size not smaller than the corresponding insertion ports, respectively, for being respectively corresponding to the insertion ports and being tightly combined to the corresponding insertion ports; and a tightening base body extending out of the fixing unit and having a butting surface close to the body and a back surface opposite to the butting surface, at least one butting part is formed on the butting surface, so that when the fixing units are respectively and tightly combined to the corresponding insertion ports, the butting part butts and holds the circuit board and the height direction motion sensing piece between the tightening base body and the body.

Compared with the prior art, the invention can accurately position the motion sensing part in the height direction in all dimension directions by tightly combining the positioning device and the insertion port on the body, and form the precisely configured Z-axis direction vibration measuring assembly by the tiny controllable errors of the mechanical component in all dimension directions, thereby reducing the deviation in the manufacturing and assembling process; the vibration measurement in the Z-axis direction can completely reflect the actual vibration situation faithfully, and the high precision provided by the original specification of the component is fully presented. Of course, those skilled in the art can easily understand that the present invention is not limited to the structure design in the Z-axis direction, but because the general measurement uses the plane in the X-Y direction as the reference plane of the structure, the vibration measurement component in the X-axis or Y-axis direction is relatively easy to install, but the present invention does not exclude the three-dimensional vibration measurement component or any two-dimensional vibration measurement component having the X-axis, Y-axis and Z-axis.

In addition, the fixed unit is tightly combined with the insertion port on the body, so that the height direction motion sensing component is mechanically and accurately positioned to form the vibration measuring component, on one hand, the combined structure is simple, the operation difficulty is low, the yield is improved, the height direction accurate positioning can be provided, the deviation caused in the manufacturing and assembling process is reduced, the measuring accuracy of the vibration measuring component is reduced, the original precision effect of the vibration sensing component can be fully shown, the simultaneous use of a plurality of vibration measuring components can be realized, and the integral accuracy is not reduced.

Drawings

FIG. 1 is a perspective view of a vibration measuring assembly with a precise positioning device for a height-direction motion sensor according to a first preferred embodiment of the present invention.

FIG. 2 is a schematic view of a vibration measuring assembly with a precise positioning device for a height-direction motion sensor according to a first preferred embodiment of the present invention.

FIG. 3 is a schematic side view of a vibration measuring assembly with a precise positioning device for a height direction movement sensor according to a first preferred embodiment of the present invention in a high speed railway train installation application.

FIG. 4 is an exploded view of the vibration measuring device with the precise positioning apparatus for the height-direction motion sensor according to the first preferred embodiment of the present invention, taken along the line A-A in FIG. 1.

FIG. 5 is an exploded perspective view of a vibration measuring assembly with a precise positioning device for a height direction movement sensor according to a second preferred embodiment of the present invention.

FIG. 6 is an assembled side view of a vibration measurement assembly with a precise positioning device for a height direction motion sensor according to a second preferred embodiment of the present invention.

Fig. 7 is a schematic view of a prior art three-axis vibration sensing member.

Wherein: 1 is a vibration measuring component; 10. 10' is a body; 12. 12' is a reference surface; 14. 14' is an orthogonal setting surface; 142 is the quadrature compensation positioning port; 1422 is the quadrature compensation plane; 16. 16' is an insertion port; 2. 2' is a height direction movement sensing member; 22. 22', 92 are circuit boards; 3. 3' is a positioning device; 32. 32' is a fixed unit; 34. 34' is a packing base body; 342 is a butt joint surface; 344 is the back; 346. 346' is an abutment; 347' is a bump with equal height; 36' is a containing space; 4 is a high-speed railway train; 42 is an axle; 5 is an orthogonal auxiliary unit; 54 is an orthogonal mounting surface; 52 is an embedding surface; 56 is a perforation; 9 is a triaxial vibration sensing assembly; 94 is an X-axis sensing chip; 95 is a Y-axis sensing chip; 96 is a planarization layer; 97 is a Z-axis sensing chip; A-A is a section line; s is a spacing; theta 1 is an oblique angle; theta 2 is a complementary angle.

Detailed Description

The invention is further illustrated with reference to the following figures and specific examples. These examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure in any way whatsoever. After reading the description of the invention, one skilled in the art can make various changes and modifications to the invention, and such equivalent changes and modifications also fall into the scope of the invention defined by the claims.

First preferred embodiment

As shown in fig. 1 to 2, in a vibration measuring assembly 1 having a precise positioning device for a height direction motion sensing element 2 according to a first preferred embodiment of the present invention, the height direction motion sensing element 2 is, for example, a mems gravity sensing integrated circuit, and the vibration measuring assembly 1 includes: the body 10, the height direction motion sensing element 2, the circuit board 22 for soldering the height direction motion sensing element 2, and the positioning device 3 are illustrated as an integrally formed aluminum alloy casing, such as a flexible circuit board designed and customized according to the inner space of the body 10, and are illustrated as being inserted by a pin and tightly combined with the body 10 to precisely position the height direction motion sensing element 2 on the body 10. The section line A-A in FIG. 1 is used for the subsequent generation of cross-sectional views to further illustrate how the positioning device 3 precisely positions the height direction motion sensing element 2 on the body 10.

The main body 10 has a reference plane 12 parallel to a horizontal plane, for example, and an orthogonal plane 14 perpendicular to a vertical wall of the reference plane 12, for example, by precision machining, and the orthogonal plane 14 has two insertion ports 16, which are different in size, are not symmetrical to each other, and are separated from each other by the above-mentioned recess having the height direction motion sensor 2, wherein a space S formed between the two insertion ports 16 in this embodiment just corresponds to an outer dimension space of the height direction motion sensor 2.

Referring to fig. 3, the vibration measuring assembly 1 further includes a set of lateral motion sensing elements (not shown) disposed on the reference plane and orthogonal to the height direction motion sensing elements, and a set of longitudinal motion sensing elements (not shown) disposed on the reference plane and orthogonal to the height direction motion sensing elements and the lateral motion sensing elements, so as to monitor the vibration of the axle 42 of the high-speed railway train 4. Thus, three independent vibration sensing elements measure three-dimensional vibrations, respectively, and are provided to, for example, a subsequent analysis device, thereby sensing multiple vibrations of, for example, a transmission shaft, a reducer, etc. Of course, those skilled in the art can easily understand that in the context of high-speed railway cars, a plurality of vibration measurement assemblies, not limited to one, may be provided.

Fig. 4 is a schematic cross-sectional view taken along a line a-a in fig. 1, referring to fig. 4, the positioning device 3 has two fixing units 32, which are complementary to the two insertion ports 16 at the same center line and have a size not smaller than the corresponding insertion ports 16, wherein the two fixing units 32 are, for example, two metal cylindrical pins with different sizes, which are not symmetrical to each other and are easy to manufacture, for respectively corresponding to the two insertion ports 16 with different sizes and not symmetrical to each other. The positioning device 3 further has a pressing base 34 extending out of the fixing unit 32, such as a vibration-resistant and non-deformable planar metal plate, the pressing base 34 can be divided into an abutting surface 342 close to the body 10, which is illustrated as a high-flatness surface, and a back surface 344 opposite to the abutting surface 342, and at least one abutting portion 346, which is illustrated as a high-flatness surface, is formed on the abutting surface 342.

The vibration measuring module 1 also has an orthogonal auxiliary unit 5, illustrated as a cast metal block, having an orthogonal mounting surface 54 facing the height direction movement sensing member 2, and an embedding surface 52 opposite to the orthogonal mounting surface 54, the embedding surface 52 having a draft angle θ 1 of, for example, 0.1 ° to 0.3 ° facing the reference surface 12 so as to be easily demolded in mass production using a casting technique, and then the orthogonal mounting surface 54 is precision-machined with a CNC milling machine to have a high perpendicularity with respect to the reference surface 12. The orthogonal installation surface 14 is formed with an orthogonal compensation positioning port 142 relative to the orthogonal auxiliary unit 5, which can be explained as a groove having an opening facing a side away from the reference surface and a shape and size complementary to the orthogonal auxiliary unit 5, the orthogonal compensation positioning port 142 has an orthogonal compensation surface 1422 facing the height direction motion sensor 2, which has a complementary angle θ 2 complementary to the above-mentioned oblique angle θ 1, for maintaining the orthogonal installation surface 54 orthogonal to the reference surface 12 when the orthogonal auxiliary unit 5 is inserted into the orthogonal compensation positioning port 142 on the orthogonal installation surface 14 and combined with the body 10.

The orthogonal auxiliary unit 5 further has two through holes 56 respectively corresponding to the insertion ports 16 and the fixing units 32 on the same center line, for the two fixing units 32 to be tightly coupled to the respective insertion ports 16 through the respective through holes 56. Since the flexible printed circuit board is used in the present embodiment and the two positioning devices 3 are slightly smaller than the corresponding insertion port 16 and the corresponding through hole 56 from the tip end and then gradually increase to a size slightly larger than the corresponding insertion port 16, the positioning device 3 is defined as not smaller than the insertion port 16 since the size of the profile of the positioning device 3 to be finally inserted is equal to or slightly larger than the insertion port.

The positioning device 3 can be easily pressed to pierce the flexible circuit board 22 of the present embodiment and be inserted into the corresponding insertion port 16 by a pressing and bonding manner, and at this time, a strong friction force is generated between the abutting portion 346 and the height direction motion sensor 2 due to the pressing and bonding pressure, so that the circuit board 22 and the height direction motion sensor 2 are abutted and held between the pressing base 34 and the body 10, and the height direction motion sensor 2 is maintained in close contact with and abutted against the reference surface 12.

In addition, since the distance between the two fixing units 32 corresponds to the space S between the two insertion ports 16, that is, exactly corresponds to the dimension of the height direction motion sensor 2. Therefore, after the positioning device 3 completes the above combination, the height direction motion sensing element 2 is exactly clamped, even if the height direction motion sensing element 2 is positioned in a position deviation when being welded on the circuit board 22 or the height direction motion sensing element 2 is positioned in a position deviation caused by soldering tin welding, the height direction motion sensing element 2 can still be accurately positioned in a preset position by the positioning device 3, thereby providing high-accuracy vibration measurement information and achieving the purpose of the invention. In the experiments of the inventor, since the precision machining error can be limited to the range of 1 μm, the precision deviation caused by installation and fixation is very small compared with the dimension of the height direction motion sensing element, the vibration measuring accuracy of the vibration measuring assembly 1 in the height direction can reach 1mG/V, and the vibration resistance of the vibration measuring assembly 2 in the height direction is greatly improved due to the clamping of the height direction motion sensing element 2 by the positioning device 3, so that the service life and reliability of the vibration measuring assembly in the high vibration measuring environment are further prolonged.

In the embodiment, by means of the two fixing units which are complementary to the insertion ports respectively and have the size not smaller than the corresponding insertion ports, the flexible circuit board is penetrated and then tightly combined with the insertion ports on the body through the through holes of the orthogonal auxiliary units, so that the height direction motion sensing part is accurately positioned to form the vibration measuring assembly, and the accurate positioning can be provided in the height direction to reduce the measuring precision and accuracy of the vibration measuring assembly caused by deviation in the manufacturing and assembling process. The orthogonal auxiliary unit and the orthogonal compensation positioning port are combined, so that the processing time of each vibration measuring component on a precise CNC lathe or a milling machine can be reduced, the processing cost is reduced, the production capacity is improved, and in addition, the two-piece structure is also favorable for reducing the cost of maintenance and replacement and improving the yield.

In the present embodiment, after the clamping is appropriate, the circuit and the external circuit on the circuit board 22 are further connected or soldered by wire bonding, or even simply pressed and pressed, and the glue is injected and cured inside the five-sided hollow structure of the drawing, so that all the components and structures are completely fixed relatively, on one hand, a good precise positioning effect is maintained, and on the other hand, dust, moisture or acid-base corrosion in a severe environment can be prevented.

In this embodiment, the vibration measuring assembly 1 is composed of a height direction (Z axis) motion sensing element, a horizontal direction (X axis) motion sensing element and a vertical direction (Y axis) motion sensing element, but it is easily understood by those skilled in the art that the height direction motion sensing element can be independently assembled into a height direction vibration measuring assembly even if three-dimensional measurement is not integrated, and a two-dimensional vibration measuring assembly composed of a horizontal direction motion sensing element and a vertical direction motion sensing element which are separately configured is assembled into a quasi-positioning three-dimensional vibration measuring assembly without hindering the implementation of the present application.

Second preferred embodiment

The second preferred embodiment of the present invention is described below, the same parts in this embodiment as those in the previous preferred embodiment are not described herein again, similar components are also given similar names and reference numerals, and only the differences are described. Referring to fig. 5 to 6, in the present embodiment, the main body 10 'is an aluminum alloy housing formed by die casting, the orthogonal setting surface 14' thereon has 4 insertion ports 16 ', which are exemplified as long grooves, and the 4 insertion ports 16' are connected to form a ring-shaped groove, and the 4 fixing units 32 'corresponding to the 4 insertion ports 16' on the positioning device 3 'are all long walls, and the 4 fixing units 32' also form a containing space 36 'surrounded by a ring-shaped enclosure for containing the height direction motion sensing element 2'. The height of the fixing unit 32 ' is greater than the thickness of the height direction movement sensing piece 2 ', and the height of the fixing unit 32 ' is not greater than the sum of the depth of the insertion port 16 ' and the thickness of the height direction movement sensing piece 2 '.

Unlike the previous preferred embodiment, the packing base 34 ' in this embodiment clamps the height direction motion sensor 2 ' and the circuit board 22 ' by the 4 fixing units 32 ', and directly and respectively inserts into the corresponding insertion ports 16 ' without passing through the orthogonal auxiliary unit, thereby maintaining the height direction motion sensor 2 ' to be orthogonal to the reference plane 12 ', thereby having an additional advantage of simple structure and easy manufacturing. In addition, since the positioning device 3 ' completely seals the height direction motion sensing element 2 ' in the accommodating space 36 ' via the 4 fixing units 32 ', better protection can be provided, and since the 4 fixing units 32 ' also exactly correspond to the overall dimension of the height direction motion sensing element 2 ', after the positioning device 3 ' completes the above combination, better two-dimensional clamping force can be provided exactly in the directions of length, width and the like of the height direction motion sensing element 2 ', even if the circuit board 22 ' is positioned unevenly, or the height direction motion sensing element 2 ' is positioned eccentrically due to soldering, the height direction motion sensing element 2 ' can still be fixed at a precisely positioned position, thereby providing high-accuracy vibration measurement information.

Because the size of the fixing unit 32 ' in this embodiment is not smaller than the insertion port 16 ', when 4 fixing units 32 ' clamp the height direction motion sensor 2 ' and the circuit board 22 ' and are inserted into the corresponding insertion ports 16 ', respectively, the abutting portion 346 ' of the clamping base 34 ' further has at least 3 bumps 347 ' with equal height, so as to hold the circuit board 22 ' together with the height direction motion sensor 2 ' in abutment between the clamping base 34 ' and the orthogonal arrangement surface 14 ' of the body space 10 ', so that the height direction motion sensor 2 ' and the orthogonal arrangement surface 14 ' are also kept orthogonal to the reference surface 12 ', and thus the positioning device 3 ' provides an additional one-dimensional clamping force in the thickness direction of the height direction motion sensor 2 ' after completing the above combination.

The positioning device of the embodiment provides three-dimensional clamping such as length, width and thickness for the height direction motion sensing piece by the fastening combination of the fixing unit and the insertion port and the abutting connection of the abutting connection part and the height direction motion sensing piece, so as to accurately position the height direction motion sensing piece on the vibration measurement assembly, so that the vibration measurement assembly of the embodiment has good accuracy, and the overall accuracy and precision cannot be reduced when a plurality of vibration measurement assemblies are simultaneously combined for use, thereby achieving the other purpose of the invention. In addition, the arrangement cost of the orthogonal auxiliary unit can be further saved, and more complete full-coating protection can be provided for the height direction motion sensing piece.

In summary, the positioning device of the present invention, after being combined with the body, can clamp the height direction motion sensing element, so that even if a circuit board positioning deviation occurs or the height direction motion sensing element is subjected to position drift during welding, the height direction motion sensing element can be accurately positioned, thereby providing vibration measurement information of the vibration measurement assembly with high accuracy, and further prolonging the service life of the vibration measurement assembly in a high vibration measurement environment. The invention uses a plurality of fixing units which are respectively complementary with the insertion ports and have the size not smaller than the corresponding insertion ports to be tightly combined with the insertion ports on the body, and accurately positions the height direction motion sensing assembly in the height direction to keep the height direction motion sensing assembly to be orthogonal to the reference surface, so as to reduce the influence of deviation generated in the manufacturing and assembling process on the precision and the accuracy of the measurement information of the vibration measurement assembly.

Of course, the fixing units and the corresponding insertion ports in the above preferred embodiments can be changed according to the needs of the embodiments, and are not limited thereto, and the implementation of the abutting portion can also be changed according to the needs of the product.