A bend test device and bend test method enable a mandrel bend test to be automatically performed. The bend test device includes a controlled motor, a drive shaft coupled to the motor, a nose piece coupled to the drive shaft, and a nose clamp for securing a device under test (DUT) to the nose piece. A control system connected to the bend test device uses a programmed control algorithm to control the bend test device. The motor is connected to the drive shaft and rotates the drive shaft in response to control signaling provided by the control system. The rotating drive shaft in turn rotates the nose piece. Rotation of the nose piece bends the mounted DUT. The motor rotates the drive shaft as defined by the software parameters and the DUT is bent back and forth across a defined radius edge.

A bend test device and bend test method enable a mandrel bend test to be automatically performed. The bend test device includes a controlled motor, a drive shaft coupled to the motor, a nose piece coupled to the drive shaft, and a nose clamp for securing a device under test (DUT) to the nose piece. A control system connected to the bend test device uses a programmed control algorithm to control the bend test device. The motor is connected to the drive shaft and rotates the drive shaft in response to control signaling provided by the control system. The rotating drive shaft in turn rotates the nose piece. Rotation of the nose piece bends the mounted DUT. The motor rotates the drive shaft as defined by the software parameters and the DUT is bent back and forth across a defined radius edge.

A fold testing device, including a support mechanism, an adjusting mechanism, and an attaching mechanism. The support mechanism includes a supporting body, a first position limiting part, and a second position limiting part. The first position limiting part and the second position limiting part are arranged on a side of the supporting body along a first direction. The supporting body, the first position limiting part and the second position limiting part are enclosed to form a positioning part. A flexible display module is received in the positioning part. The adjusting mechanism is installed on the supporting body, and configured to drive at least one of the first position limiting part and the second position limiting part to move along the first direction. The attaching mechanism includes an elastic attaching body. The elastic attaching body is movable toward the supporting body along a second direction. The elastic attaching body engages with the positioning part.

A fold testing device, including a support mechanism, an adjusting mechanism, and an attaching mechanism. The support mechanism includes a supporting body, a first position limiting part, and a second position limiting part. The first position limiting part and the second position limiting part are arranged on a side of the supporting body along a first direction. The supporting body, the first position limiting part and the second position limiting part are enclosed to form a positioning part. A flexible display module is received in the positioning part. The adjusting mechanism is installed on the supporting body, and configured to drive at least one of the first position limiting part and the second position limiting part to move along the first direction. The attaching mechanism includes an elastic attaching body. The elastic attaching body is movable toward the supporting body along a second direction. The elastic attaching body engages with the positioning part.

An apparatus for determining torque on bit and bending forces in a drilling assembly. The apparatus includes a body having an inner bore defined by an inner wall and having an outer wall, the body also including first and second light bores disposed between the inner wall and the outer wall and a light emitting assembly arranged and configured to cause a light beam to enter the first and second light bores. The assembly further includes first and second light sensors disposed in or at an end of the first and second light bores, respectively, that measure a location where light that enters the first and second light bores contacts the sensors

An apparatus for determining torque on bit and bending forces in a drilling assembly. The apparatus includes a body having an inner bore defined by an inner wall and having an outer wall, the body also including first and second light bores disposed between the inner wall and the outer wall and a light emitting assembly arranged and configured to cause a light beam to enter the first and second light bores. The assembly further includes first and second light sensors disposed in or at an end of the first and second light bores, respectively, that measure a location where light that enters the first and second light bores contacts the sensors

A bending applying device includes three mandrels and applies bending to an optical fiber by winding the optical fiber onto the mandrels. The mandrels are alternately arranged at predetermined intervals such that outer circumferences of adjacent mandrels in a longitudinal direction of the optical fiber face each other in a non-contact manner. A diameter of the optical fiber is D, a radius of the mandrel is r, an interval between the adjacent mandrels in the first direction is 2r + d, a direction orthogonal to the first direction is a second direction, an interval between the adjacent mandrels in the second direction is s, and an angle θ between the second direction and a common internal tangent of the adjacent mandrels is 0 degrees or more and 45 degrees or less, and the formed angle θ satisfies following formula.

[00001]$\sqrt{\left(d+D+4r\right)\left(d-D\right)+s^2}=2\left(r+\frac{D}{2}\right)\tan \theta +\frac{s}{\cos \theta }$

A battery bending test system includes a fastening device having an inclined surface configured to hold a battery; a pressing device configured to press the battery to bend; and a load-bearing device configured to bear the fastening device, the load-bearing device having a reference surface for bearing the fastening device. A first angle Ø is formed between the inclined surface and the reference surface. The range of the first angle Ø is 0°<Ø<90°. The battery bending test system and method can precisely control the bending angle and bending morphology of the battery, and reasonably evaluate the safety performance of the battery when subjected to the bending force, thus meeting expectations of the safety test.

A battery bending test system includes a fastening device having an inclined surface configured to hold a battery; a pressing device configured to press the battery to bend; and a load-bearing device configured to bear the fastening device, the load-bearing device having a reference surface for bearing the fastening device. A first angle Ø is formed between the inclined surface and the reference surface. The range of the first angle Ø is 0°<Ø<90°. The battery bending test system and method can precisely control the bending angle and bending morphology of the battery, and reasonably evaluate the safety performance of the battery when subjected to the bending force, thus meeting expectations of the safety test.

A 360 degree folding jig performs actions similar to those of a product to which a sample is applied when conducting a durability test for the sample. The 360 degree folding jig includes a fixed plate module on which one side of a sample is supported, a folding plate module that is spaced apart from the fixed plate module and on which the other side of the sample is supported so as to be reciprocally movable, and a pair of rotation support modules respectively provided at each end of the mutually adjacent fixed plate module and the folding plate module, and configured to couple the folding plate module to the fixed plate module so that the folding plate module is in-folded or out-folded.