Methods and systems for sensing deformation
Methods, apparatuses and systems for a sensing deformation in a surface are disclosed herein. An example device may include a support unit including a first frame and a second frame. A first end of the first frame and a first end of the second frame are mechanically coupled to the surface. The sensing device includes a pin joint that mechanically couples the first frame to the second frame, such that a first relative movement between the first end of the first frame and the first end of the second frame is amplified to a second relative movement between a second end of the first frame and a second end of the second frame. The sensing device includes a sensor that senses the second relative movement between the second end of the first frame and the second end of the second frame.
1 . A sensing device comprising:
a support unit comprising a first frame and a second frame, wherein a first end of the first frame and a first end of the second frame are configured to mechanically couple to a surface;
a pin joint configured to mechanically couple the first frame to the second frame, such that a first relative movement between the first end of the first frame and the first end of the second frame is amplified to a second relative movement between a second end of the first frame and a second end of the second frame, wherein a first distance between the pin joint and a first line passing through the first end of the first frame and the first end of the second frame is less than a second distance between the pin joint and a second line passing through the second end of the first frame and the second end of the second frame; and
a sensor mechanically coupled to the second end of the first frame and the second end of the second frame, the sensor configured to sense the second relative movement between the second end of the first frame and the second end of the second frame.
2 . The sensing device of claim 1 , wherein the first relative movement is caused by a deformation of the surface.
3 . The sensing device of claim 2 , wherein the surface is on a bottom cover of an electric vehicle facing a battery of the electric vehicle.
4 . The sensing device of claim 3 , wherein the battery comprises a battery cell structure, wherein the battery cell structure and the bottom cover form a chassis of the electric vehicle.
5 . The sensing device of claim 2 , wherein the sensor comprises a resistive strain gauge wherein a resistance varies due to the second relative movement and wherein the deformation is detected when the resistance is outside a normal resistance range.
6 . The sensing device of claim 2 , wherein the sensor comprises a capacitive strain gauge wherein a capacitance of the strain gauge sensor varies due to the second relative movement and wherein the deformation is detected when the capacitance is outside a normal capacitance range.
7 . The sensing device of claim 2 , wherein the sensor comprises an inductive strain gauge wherein an inductance of the strain gauge sensor varies due to the second relative movement and wherein the deformation is detected when the inductance is outside a normal inductance range.
8 . The sensing device of claim 2 , wherein the sensor comprises a piezoelectric material, wherein the piezoelectric material generates a voltage due to the second relative movement and wherein the deformation is detected when the voltage is outside a normal voltage range.
9 . The sensing device of claim 1 , wherein the first frame crosses the second frame at the pin joint and the first and second frames are each configured to pivot independently around the pin joint.
10 . A method comprising:
amplifying a first relative movement between a first location and a second location on a surface using a first frame and a second frame mechanically coupled to the first and second locations respectively and mechanically coupled to each other at a pin joint, wherein a first distance between the pin joint and a first line passing through the first end of the first frame and the first end of the second frame is less than a second distance between the pin joint and a second line passing through the second end of the first frame and the second end of the second frame;
generating a second relative movement resulting from the amplification of the first relative movement by the support unit;
varying an electrical property of an electrical component using the second relative movement; and
detecting a deformation of the surface using an amount of variation in the electrical property.
11 . The method of claim 10 , further comprising:
measuring the electrical property of the electrical component;
comparing the electrical property of the electrical component with a first threshold and with a second threshold; and
determining the deformation of the surface when the electrical property is higher than a first threshold or lower than a second threshold.
12 . The method of claim 11 , wherein the surface is on a bottom cover of an electric vehicle facing a battery of the electric vehicle.
13 . The method of claim 12 , wherein the battery comprises a battery cell structure, wherein the battery cell structure and the bottom cover form a chassis of the electric vehicle.
14 . The method of claim 10 , wherein the electrical component comprises a resistive strain gauge and the electrical property comprises a resistance configured to vary due to the second relative movement and the method comprising detecting the deformation when the resistance is outside a normal resistance range.
15 . The method of claim 10 , wherein the electrical component comprises a capacitive strain gauge and the electrical property comprises a capacitance configured to vary due to the second relative movement and the method comprising detecting the deformation when the capacitance is outside a normal capacitance range.
16 . The method of claim 10 , wherein the electrical component comprises a piezoelectric material and the electrical property comprises a voltage generated by the piezoelectric material due to the second relative movement and the method comprising detecting the deformation when the voltage is outside a normal voltage range.
17 . The method of claim 10 further comprising generating an alarm when the deformation is detected.
18 . A sensing system comprising:
a plurality of support units each comprising a first frame and a second frame, wherein a first end of each first frame and a first end of each second frame are configured to mechanically couple to a surface; a pin joint configured to mechanically couple each first frame to each corresponding second frame, such that a first relative movement between the first end of the first frame and the first end of the corresponding second frame is amplified to a second relative movement between a second end of the first frame and a second end of the corresponding second frame, wherein a first distance between the pin joint and a first line passing through the first end of the first frame and the first end of the second frame is less than a second distance between the pin joint and a second line passing through the second end of the first frame and the second end of the second frame; and
a sensor mechanically coupled to second ends of the plurality of the first frames and second ends of the plurality of the second frames, the sensor configured to sense the second relative movement.
19 . The sensing system of claim 18 , wherein the sensor comprises an electrical component configured to have a variable electrical property as a result of the second relative movement, the sensing system comprising a controller configured to determine a deformation of the surface using an amount of variation in the electrical property.