Tension sensor

Abstract

A tension sensor relates to the field of sensors. The tension sensor comprises a shell internally provided with an elastic piece, a circuit board and a battery, the two ends of the elastic piece are connected with pulling and connecting parts penetrating out of the two ends of the shell respectively, at least two strain gauges adhere to the surface of the elastic piece, the shell is connected with an electric connector, and the battery, the strain gauges and the electric connector are electrically connected with the circuit board respectively. According to the tension sensor provided by the invention, the force borne by the pulling and connecting part of the elastic sheet is transmitted to the shell for dispersion, so that the impact resistance and the structural strength of the tension sensor can be effectively improved, the torsional deformation of the tension sensor in the stress process is reduced, the cable is prevented from being snapped, and the detection precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a tension sensor. BACKGROUND

[0002] The existing tension sensor is applied to air drop and impact test, and the anti-impact capability is insufficient, so that the cable of the tension sensor is easily pulled off or the tension sensor is easily pulled off, and the complete data cannot be collected by the tension sensor. CONTENT

[0003] The present application aims to provide a tension sensor which can effectively improve the anti-impact performance and structural strength of the tension sensor, reduce the torsional deformation of the tension sensor in the stress process, avoid the cable from being pulled off, and improve the detection accuracy.

[0004] The present application is implemented as follows:

[0005] The present application provides a tension sensor, which comprises a shell provided with an elastic sheet, a circuit board and a battery, two ends of the elastic sheet are respectively connected with pull connection parts penetrating through both ends of the shell, at least two strain gauges are attached to the surface of the elastic sheet, the shell is connected with an electric connector, and the battery, the strain gauges and the electric connector are respectively electrically connected with the circuit board.

[0006] In some optional embodiments, the strain gauges comprise at least one pair of first strain gauges symmetrically arranged on the top surface and the bottom surface of the elastic sheet and at least one pair of second strain gauges symmetrically arranged on the top surface and the bottom surface of the elastic sheet, and the first strain gauges and the second strain gauges respectively extend along the length direction and the width direction of the elastic sheet.

[0007] In some optional embodiments, the shell comprises an upper shell cover and a lower shell cover which are detachably connected through a plurality of connecting pieces, a containing cavity containing the elastic sheet, the circuit board and the battery is formed between the upper shell cover and the lower shell cover, openings are respectively formed at both ends of the upper shell cover and the lower shell cover, the two pull connection parts respectively pass through the openings at both ends of the upper shell cover and the lower shell cover, and the circuit board and the battery are respectively connected to the upper shell cover and the lower shell cover.

[0008] In some optional embodiments, the at least one pull connection part is detachably connected with the upper shell cover and the lower shell cover through the connecting pieces.

[0009] In some optional embodiments, the outer walls of the upper shell cover and the lower shell cover are respectively provided with at least one connecting plate, the pull connection parts are respectively provided with connecting grooves clamping the connecting plates, and the connecting plates are connected with the pull connection parts through a plurality of connecting pieces penetrating through the bottom of the connecting grooves.

[0010] In some optional embodiments, the lower shell cover is provided with a connecting seat plate located below the elastic sheet, and the battery is connected to the bottom of the connecting seat plate.

[0011] In some optional embodiments, a buffer layer is further filled between the lower shell cover and the battery.

[0012] In some optional embodiments, each pull connection part is provided with at least one pull connection hole.

[0013] The beneficial effects of the present application are: the tension sensor provided by the present application comprises a shell provided with an elastic sheet, a circuit board and a battery, both ends of the elastic sheet are connected with pull connection parts penetrating through both ends of the shell, the surface of the elastic sheet is pasted with at least two strain gauges, the shell is connected with an electrical connector, and the battery, the strain gauges and the electrical connector are respectively electrically connected with the circuit board. The tension sensor provided by the present application can effectively improve the impact resistance and structural strength of the tension sensor by transmitting the force borne by the pull connection parts of the elastic sheet to the shell for dispersion, reduce the torsional deformation of the tension sensor during the force bearing process, avoid the cable line from being broken, and improve the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 The structure schematic diagram of the tension sensor provided by the embodiments of the present application is shown in the figure.

[0016] Figure 2 The structure schematic diagram of the tension sensor provided by the embodiments of the present application is shown in the figure.

[0017] Figure 3 The structure schematic diagram of the tension sensor provided by the embodiments of the present application is shown in the figure.

[0018] Figure 4 The structure schematic diagram of the tension sensor provided by the embodiments of the present application is shown in the figure.

[0019] Figure 5 The structure schematic diagram of the tension sensor provided by the embodiments of the present application is shown in the figure.

[0020] In the figure: 100, the shell; 101, the upper shell cover; 102, the lower shell cover; 103, the accommodating cavity; 104, the opening; 110, the elastic sheet; 120, the circuit board; 130, the battery; 140, the pull connection; 141, the pull connection hole; 150, the first strain gauge; 160, the second strain gauge; 170, the electrical connector; 180, the connecting plate; 181, the first threaded hole; 190, the connecting groove; 191, the second threaded hole; 200, the connecting seat plate; 210, the buffer layer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0023] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0027] In this application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0028] The features and performance of the tension sensor of the present application are further described in detail below in conjunction with the embodiments.

[0029] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the embodiment of the present application provides a tension sensor, which comprises a cuboid-shaped shell 100 and a cuboid-shaped elastic sheet 110, a circuit board 120 and a battery 130 arranged in the shell 100. The shell 100 comprises an upper shell cover 101 and a lower shell cover 102 which are detachably connected by four bolts. The upper shell cover 101 and the lower shell cover 102 form a containing cavity 103 which contains the elastic sheet 110, the circuit board 120 and the battery 130. The two ends of the upper shell cover 101 and the lower shell cover 102 are respectively provided with openings 104. The two ends of the elastic sheet 110 are respectively connected with pull-in portions 140 which extend out of the openings 104 at the two ends of the upper shell cover 101 and the lower shell cover 102. Each pull-in portion 140 is provided with a pull-in hole 141 which penetrates through the two sides thereof. A pair of symmetrically arranged first strain gauges 150 and a pair of symmetrically arranged second strain gauges 160 are pasted on the upper surface and the lower surface of the elastic sheet 110. The first strain gauges 150 and the second strain gauges 160 respectively extend along the length direction and the width direction of the elastic sheet 110. The upper shell cover 101 is connected with an electric connector 170. The battery 130, the first strain gauges 150 and the second strain gauges 160 are respectively electrically connected with the electric connector 170 through an electric cable.

[0030] The outer wall of one end of the upper shell cover 101 and the lower shell cover 102 is respectively provided with a connecting plate 180, two first threaded holes 181 are arranged on each connecting plate 180, the top surface and the bottom surface of the pull connecting part 140 are respectively provided with a connecting groove 190 corresponding to the two connecting plates 180, the two connecting grooves 190 are respectively provided with a second threaded hole 191 corresponding to the first threaded hole 181, and the two connecting plates 180 are connected to the second threaded hole 191 at the bottom of the corresponding connecting groove 190 through the two bolts passing through the first threaded hole 181. The circuit board 120 is connected in the upper shell cover 101, the connecting seat plate 200 is connected in the lower shell cover 102, the circuit board 120, the elastic sheet 110 and the connecting seat plate 200 are arranged in intervals from top to bottom, and the battery 130 is connected to the bottom of the connecting seat plate 200. In the embodiment, the top of the upper shell cover 101 and the bottom of the lower shell cover 102 are respectively provided with an opening, and the upper shell cover 101 and the lower shell cover 102 are respectively connected with a top cover and a bottom cover for closing the opening through bolts. The openings 104 opened at the two ends of the upper shell cover 101 and the lower shell cover 102 are rectangular and respectively pass through the bottom of the upper shell cover 101 and the top of the lower shell cover 102.

[0031] The pull force sensor provided by the embodiment of the application is protected by being covered by the shell 100 formed by connecting the upper shell cover 101 and the lower shell cover 102, and the pull connecting parts 140 connected at the two ends of the elastic sheet 110 pass through the openings 104 at the two ends of the upper shell cover 101 and the lower shell cover 102, respectively, and the pull connecting parts 140 are respectively provided with a flexible connecting rope or a conversion joint, the first strain gauge 150 and the second strain gauge 160 electrically connected to the circuit board 120 are arranged on the elastic sheet 110, the first strain gauge 150 and the second strain gauge 160 can detect and transmit the detected data to the circuit board 120 when the pull connecting parts 140 are subjected to a pulling force, and the stress borne by the pull connecting parts 140 is transmitted to the upper shell cover 101 and the lower shell cover 102 for dispersion when the pull connecting parts 140 are subjected to a stress, so that the impact resistance and the tensile performance of the pull connecting parts 140 are effectively improved, the rigidity of the pull connecting parts 140 is improved, the torsional deformation of the pull force sensor during the stress process is reduced, and the detection accuracy is improved.

[0032] The upper surface and the lower surface of the elastic sheet 110 are respectively pasted with a pair of symmetrically arranged first strain gauges 150 and a pair of symmetrically arranged second strain gauges 160, the first strain gauges 150 and the second strain gauges 160 respectively extend along the length direction and the width direction of the elastic sheet 110, and the first strain gauges 150 and the second strain gauges 160 can be used to detect the tensile strain and the compressive strain of the elastic sheet 110, respectively.

[0033] The outer wall of one end of the upper shell cover 101 and the lower shell cover 102 is respectively provided with a connecting plate 180, the top surface and the bottom surface of the pull connecting part 140 are respectively provided with a connecting groove 190 corresponding to the two connecting plates 180, and the two connecting plates 180 are respectively connected to the bottom of the corresponding connecting groove 190 through bolts, so that the pull connecting part 140 is connected with the upper shell cover 101 and the lower shell cover 102 respectively to form a whole, and the impact resistance and tensile resistance of the pull connecting part 140 are further improved, so that the pull connecting part 140 is prevented from being damaged when impacted or subjected to tension.

[0034] The lower shell cover 102 is connected with a connecting seat plate 200, and the battery 130 is connected to the bottom of the connecting seat plate 200, so that the battery 130 is fixed by the connecting seat plate 200, and a separate cavity is formed by the connecting seat plate 200 and the lower shell cover 102 to place the battery 130, the safety of the battery 130 is ensured, and the possibility that the battery 130 is impacted by internal parts of the tension sensor is reduced.

[0035] In other optional embodiments, a buffer layer 210 is further filled between the lower shell cover 102 and the battery 130, the buffer layer 210 can be an elastic rubber layer, the buffer layer 210 is filled between the lower shell cover 102 and the battery 130 to play a buffering role, the battery 130 is protected by the buffer layer 210, the impact force borne by the lower shell cover 102 is absorbed and dispersed by the buffer layer 210 when the tension sensor is impacted, the battery 130 is prevented from being damaged directly by force, and the impact resistance of the tension sensor is effectively improved.

[0036] In other optional embodiments, the number of the first strain gauge 150 and the second strain gauge 160 adhered to the upper surface and the lower surface of the elastic sheet 110 can be two pairs or more than two pairs.

[0037] In other optional embodiments, the pull connecting part 140 connected to the two ends of the elastic sheet 110 can be respectively connected to the two ends of the upper shell cover 101 and the lower shell cover 102.

[0038] In other optional embodiments, the outer wall of the two ends of the upper shell cover 101 and the lower shell cover 102 can be respectively connected to the pull connecting part 140 connected to the two ends of the elastic sheet 110 through one or more connecting plates 180 and the corresponding connecting grooves 190 of the pull connecting part 140 by clamping and bolting.

[0039] The above-described embodiments are part of the embodiments of the present application, rather than all the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A tension sensor, characterized in that, The device includes a housing containing an elastic sheet, a circuit board, and a battery. The elastic sheet has pull-out portions extending through both ends of the housing. At least two strain gauges are attached to the surface of the elastic sheet. The housing is connected to an electrical connector. The battery, the strain gauges, and the electrical connector are electrically connected to the circuit board.

2. The tension sensor according to claim 1, characterized in that, The strain gauge includes at least one pair of first strain gauges symmetrically disposed on the top and bottom surfaces of the elastic sheet, and at least one pair of second strain gauges symmetrically disposed on the top and bottom surfaces of the elastic sheet, wherein the first strain gauge and the second strain gauge extend along the length and width directions of the elastic sheet, respectively.

3. The tension sensor according to claim 1, characterized in that, The housing includes an upper cover and a lower cover that are detachably connected by multiple connectors. The upper cover and the lower cover form a cavity for accommodating the elastic sheet, the circuit board, and the battery. Openings are provided at both ends of the upper cover and the lower cover. Two pull-out parts pass through the openings at both ends of the upper cover and the lower cover, respectively. The circuit board and the battery are respectively connected to the upper cover and the lower cover.

4. The tension sensor according to claim 3, characterized in that, At least one of the pull-out portions is detachably connected to the upper cover and the lower cover via connectors.

5. The tension sensor according to claim 4, characterized in that, The outer walls of the upper cover and the lower cover are respectively provided with at least one connecting plate. The pull-out part is provided with a connecting groove for engaging the connecting plate. The connecting plate is connected to the pull-out part through a plurality of connecting members that penetrate the bottom of the connecting groove.

6. The tension sensor according to claim 3, characterized in that, The lower cover has a connecting plate located below the elastic sheet, and the battery is connected to the bottom of the connecting plate.

7. The tension sensor according to claim 6, characterized in that, A buffer layer is also filled between the lower cover and the battery.

8. The tension sensor according to claim 1, characterized in that, Each of the aforementioned pull joints is provided with at least one pull joint hole.

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