Dynamic force sensor

Abstract

The utility model provides a dynamic force sensor which comprises a sensor elastic body, the sensor elastic body is in a cuboid shape, a first side surface of the sensor elastic body is provided with a mounting hole, the mounting hole is fixedly connected with a dynamic stress part, and the dynamic stress part comprises a stress end, a spring and a connecting end. One end of the spring is connected with the stress end, the other end of the spring is connected with the connecting end, and the connecting end is connected with the sensor elastic body through the mounting hole. According to the dynamic force sensor, the dynamic force bearing part is arranged at the force bearing end of the sensor, a spring damping structure is added, force is applied to the force bearing end during force measurement, is transmitted to the connecting end through the spring and then acts on the elastic body of the sensor, and the spring is used for damping the dynamic force in the process, so that the dynamic force in a dynamic state can be effectively reduced. The force acting on the sensor can be accurately measured.

Description

TECHNICAL FIELD

[0001] The utility model relates to force sensor technical field especially is involved in a kind of dynamic force sensor. BACKGROUND

[0002] Most of existing force sensors are static force sensors, i.e. only when force is stable can accurate measurement be realized, accurate measurement cannot be realized in the process of movement, and a small part of force sensors are also nominal dynamic force sensors, but they realize dynamic measurement mainly through software algorithm, and the measurement calculation process is relatively complex, and the development cost of product is higher. UTILITY MODEL CONTENT

[0003] Therefore, one purpose of the utility model is to propose a dynamic force sensor to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A dynamic force sensor comprises a sensor elastomer, the sensor elastomer is in the shape of a cuboid, a mounting hole is arranged on a first side surface of the sensor elastomer, a dynamic force receiving part is fixedly connected to the mounting hole, the dynamic force receiving part comprises a force receiving end, a spring and a connecting end, one end of the spring is connected to the force receiving end, the other end of the spring is connected to the connecting end, and the connecting end is connected to the sensor elastomer through the mounting hole.

[0006] Further, the connecting end comprises a connecting block and a positioning column, the positioning column is connected to the connecting block, the positioning column is arranged on the bottom surface of the connecting block, the positioning column can be inserted into the mounting hole, and the positioning column is in interference fit with the mounting hole.

[0007] Further, the force sensor further comprises an electronic bin and a strain bin, the strain bin comprises a first strain bin and a second strain bin, the first strain bin and the second strain bin are arranged on a second side surface and a third side surface of the sensor elastomer respectively, and the electronic bin is arranged on the second side surface or the third side surface.

[0008] Further, the first strain bin and the second strain bin are connected through a first wire passing hole, and the second strain bin and the electronic bin are connected through a second wire passing hole.

[0009] Further, the force sensor further comprises an output connector, one end of the sensor elastomer is provided with a connecting hole, one end of the output connector is inserted into the connecting hole, and the electronic bin and the connecting hole are connected through a third wire passing hole.

[0010] Further, at least two resistance strain gauges are arranged in each strain chamber, a circuit board is arranged in the electronic chamber, a signal acquisition circuit is arranged on the circuit board, and the resistance strain gauges form a Wheatstone bridge and are electrically connected with the signal acquisition circuit.

[0011] Further, the dynamic force receiving part is located at one end of the first side of the sensor elastic body away from the output connector.

[0012] Further, the force sensor further comprises a sealing cover covering the openings of the strain chamber and the electronic chamber, and sealant is filled between the sealing cover and the openings of the strain chamber and the electronic chamber.

[0013] Further, a process hole is further arranged on the sensor elastic body.

[0014] Therefore, the force sensor has the following beneficial effects:

[0015] The dynamic force sensor of the utility model, setting dynamic force receiving part at the force receiving end of the sensor, increasing spring damping structure, when measuring force, force is applied on the force receiving end, and the force is transmitted to the connecting end through the spring and then acts on the sensor elastic body, in this process, the spring reduces the dynamic force, so that the force acting on the sensor can be accurately measured in the dynamic state.

[0016] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0018] Figure 1 is the isometric view of the force sensor of the utility model;

[0019] Figure 2 is the isometric view of another perspective of the force sensor of the utility model;

[0020] Figure 3 is the top view of the force sensor of the utility model;

[0021] Figure 4 is the isometric view of the dynamic force receiving part of the utility model;

[0022] Figure 5 is the isometric view of another perspective of the dynamic force receiving part of the utility model

[0023] Figure 6 is the isometric view of the sensor elastic body of the force sensor of the utility model;

[0024] Figure 7 is the top view of the force sensor elastic body of the utility model;

[0025] Figure 8 is the front view of the force sensor elastic body of the utility model;

[0026] Figure 9 is Figure 8 the A-A section view shown in the figure;

[0027] Figure 10 is Figure 8 the B-B section view shown in the figure.

[0028] In the figure: 1, sensor elastic body; 2, first side; 3, second side; 4, third side; 6, mounting hole; 7, dynamic force part; 8, force end; 9, spring; 10, connecting end; 11, connecting block; 12, positioning column; 13, electronic warehouse; 14, first strain warehouse; 15, second strain warehouse; 16, first wire hole; 17, second wire hole; 18, third wire hole; 19, output connector; 20, connecting hole; 21, sealing cover; 22, process hole. DETAILED DESCRIPTION

[0029] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model and cannot be understood as a limitation of the utility model.

[0030] In the utility model, unless another explicit provision and limitation, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] As Figures 1-10 shown, a dynamic force sensor, including sensor elastic body 1, sensor elastic body 1 is cuboid, the first side 2 of sensor elastic body 1 is equipped with mounting hole 6, mounting hole 6 is fixedly connected with dynamic force part 7, dynamic force part 7 includes force end 8, spring 9 and connecting end 10, one end of spring 9 is connected with force end 8, the other end of spring 9 is connected with connecting end 10, and connecting end 10 is connected with sensor elastic body 1 through mounting hole 6.

[0032] The utility model discloses a dynamic force sensor, set up dynamic stress part 7 at the force receiving end 8 of sensor, increase spring 9 damping structure, when measuring force, force is applied on the force receiving end 8, through spring 9 is transferred to the connecting end 10 and then acts on sensor elastomer 1, in this process, spring 9 carries out damping for dynamic force, so that in dynamic state, the force on the sensor can be accurately measured.

[0033] As shown in the figure, sensor elastomer 1 is cuboid shape, define the four sides of cuboid sensor elastomer 1 as first side 2, second side 3, third side 4 and fourth side, first side 2 is top surface, fourth side (not indicated in the figure) is the bottom surface opposite to first side 2, second side 3 and third side 4 are oppositely arranged side, dynamic stress part 7 is installed on the first side 2 of cuboid sensor elastomer 1 through mounting hole 6.

[0034] Further, as shown in Figure 4 and Figure 5 , connecting end 10 includes connecting block 11 and positioning column 12, positioning column 12 is connected with connecting block 11, positioning column 12 is arranged on the bottom surface of connecting block 11, positioning column 12 can be inserted into mounting hole 6, and positioning column 12 is in interference fit with mounting hole 6.

[0035] As shown in Figure 4 and Figure 5 , dynamic stress part 7 includes force receiving end 8, spring 9 and connecting end 10, force receiving end 8 is a flat cylindrical structure, one end face of the flat cylindrical force receiving end 8 serves as a stress surface, and the other end face is connected with one end of spring 9, connecting end 10 includes connecting block 11 and positioning column 12, and connecting end 10 is also a flat cylindrical structure, one end face of the flat cylindrical connecting end 10 is connected with the other end of spring 9, force receiving end 8 and connecting end 10 hold spring 9 in the middle, and the other end face (bottom surface) of the flat cylindrical connecting end 10 is connected with the center positioning column 12.

[0036] As shown in Figure 7 , mounting hole 6 penetrates sensor elastomer 1, and mounting hole 6 is close to one end of sensor elastomer 1 away from output connector 19.

[0037] Further, as shown in Figure 6 , Figure 9 and Figure 10 , the force sensor further includes electronic warehouse 13 and strain warehouse, and the strain warehouse includes first strain warehouse 14 and second strain warehouse 15, the first strain warehouse 14 and the second strain warehouse 15 are arranged on the second side 3 and the third side 4 of the sensor elastomer 1 respectively, and the electronic warehouse 13 is arranged on the second side 3 or the third side 4.

[0038] As shown in Figure 9As shown in the drawings, the first strain chamber 14 and the second strain chamber 15 are oppositely arranged and respectively arranged on the second side 3 and the third side 4 of the sensor elastic body 1, and the first strain chamber 14 and the second strain chamber 15 are of the same size and shape, and more specifically, the first strain chamber 14 and the second strain chamber 15 are of a cylindrical shape, and the axes of the first strain chamber 14 and the second strain chamber 15 are located on the same straight line.

[0039] Further, as shown in the drawings, Figure 9 and Figure 10 the first strain chamber 14 and the second strain chamber 15 are connected through the first wire passing hole 16, and the second strain chamber 15 and the electronic chamber 13 are connected through the second wire passing hole 17.

[0040] Further, the force sensor further comprises an output connector 19, one end of the sensor elastic body 1 is provided with a connecting hole 20, one end of the output connector 19 extends into the connecting hole 20, and the electronic chamber 13 and the connecting hole 20 are connected through the third wire passing hole 18.

[0041] The first wire passing hole 16, the second wire passing hole 17 and the third wire passing hole 18 connect the first strain chamber 14, the second strain chamber 15, the electronic chamber 13 and the connecting hole 20, so that the connecting wire or the signal wire of the strain chamber can pass through the wire passing hole into the electronic chamber 13 and be connected with the circuit board in the electronic chamber 13, and further, the related signal measured by the force sensor can be output through the output connector 19.

[0042] Further, at least two resistance strain gauges are arranged in each strain chamber, a circuit board is arranged in the electronic chamber 13, a signal acquisition circuit is arranged on the circuit board, and the resistance strain gauges form a Wheatstone bridge and are electrically connected with the signal acquisition circuit. The Wheatstone bridge of the force sensor and the signal acquisition circuit belong to the prior art, and will not be described here.

[0043] Further, as shown in the drawings, Figure 2 the dynamic force receiving part 7 is located at one end of the sensor elastic body 1 away from the output connector 19.

[0044] Further, as shown in the drawings, Figure 2 and Figure 9 the force sensor further comprises a sealing cover 21, the sealing cover 21 covers the opening of the strain chamber and the electronic chamber 13, and sealing glue is filled between the sealing cover 21 and the opening of the strain chamber and the electronic chamber 13.

[0045] Further, a process hole 22 is further arranged on the sensor elastic body 1.

[0046] As an embodiment, as shown in the drawings, Figure 3 and Figure 7As shown, the process hole 22 has two, two process holes 22 are arranged side by side on the sensor elastomer 1 and penetrate the sensor elastomer 1.

[0047] As an embodiment, the process hole 22 can also have three, three process holes 22 are arranged side by side on the sensor elastomer 1 and penetrate the sensor elastomer 1.

[0048] As an embodiment, as shown, Figure 3 The shape of the process hole 22 is circular.

[0049] As another embodiment, the shape of the process hole 22 can also be rectangular.

[0050] That is, the number and shape of the process hole 22 are not specifically limited by the utility model, and those skilled in the art can selectively set according to actual needs. The number and shape of the process hole 22 that can be arranged on the sensor elastomer 1 and can realize force measurement are within the protection scope of the utility model.

[0051] When the force sensor is processed, the process hole 22 can provide accurate positioning reference for the part on the machine tool or clamp. By arranging the process hole 22 at a suitable position, cooperating with the positioning pin, the accurate position can be ensured every time, and the position accuracy between the machining surfaces is ensured. At the same time, in the nondestructive testing of the force sensor, the process hole 22 provides convenience for detection. When the sensor elastomer 1 is ultrasonic flaw detected, the process hole 22 is processed on the sensor elastomer 1, the probe is facilitated to enter, and whether there is a crack or other defects inside is detected, so that the product quality of the force sensor is ensured.

[0052] The utility model adds the spring 9 shock absorption structure on the sensor, realizes the accurate measurement of force under the dynamic.

[0053] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] It is not difficult for those skilled in the art to understand that the utility model includes any combination of the utility model contents and the specific implementation mode part of the above description and the parts shown in the drawings, and each scheme formed by these combinations is not described one by one due to the limited length and for the sake of brevity of the description. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0055] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and those skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A dynamic force sensor, characterized by The application relates to a sensor elastic body, which comprises a sensor elastic body in the shape of a cuboid, a mounting hole is arranged on the first side of the sensor elastic body, a dynamic stress part is fixedly connected with the mounting hole, the dynamic stress part comprises a stress end, a spring and a connecting end, one end of the spring is connected with the stress end, the other end of the spring is connected with the connecting end, and the connecting end is connected with the sensor elastic body through the mounting hole.

2. A dynamic force sensor according to claim 1, wherein The connecting end comprises a connecting block and a positioning column, the positioning column is connected with the connecting block, the positioning column is arranged on the bottom surface of the connecting block, the positioning column can be inserted into the mounting hole, and the positioning column is in interference fit with the mounting hole.

3. A dynamic force sensor according to claim 1, wherein The sensor elastic body further comprises an electronic bin and strain bins, the strain bins comprise a first strain bin and a second strain bin, the first strain bin and the second strain bin are arranged on the second side and the third side of the sensor elastic body respectively, and the electronic bin is arranged on the second side or the third side.

4. A dynamic force sensor according to claim 3, wherein The first strain bin and the second strain bin are connected through a first wire passing hole, and the second strain bin and the electronic bin are connected through a second wire passing hole.

5. A dynamic force sensor according to claim 4, wherein The sensor elastic body further comprises an output connector, one end of the output connector is inserted into a connecting hole arranged on one end of the sensor elastic body, and the electronic bin and the connecting hole are connected through a third wire passing hole.

6. A dynamic force sensor according to any one of claims 3-5, characterized in that At least two resistance strain gauges are arranged in each strain bin, a circuit board is arranged in the electronic bin, a signal acquisition circuit is arranged on the circuit board, the resistance strain gauges form a Wheatstone bridge and are electrically connected with the signal acquisition circuit.

7. A dynamic force sensor according to claim 5, wherein The dynamic stress part is located at the end of the first side of the sensor elastic body, which is away from the output connector.

8. A dynamic force sensor according to claim 3, wherein The sensor elastic body further comprises a sealing cover, the sealing cover covers the openings of the strain bins and the electronic bin, and sealing glue is filled between the sealing cover and the openings of the strain bins and the electronic bin.

9. A dynamic force sensor according to claim 1, wherein The sensor elastic body is further provided with a process hole.

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