CN112986317A - Testing device for thermally driving artificial muscle fibers and application method thereof - Google Patents
Testing device for thermally driving artificial muscle fibers and application method thereof Download PDFInfo
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- CN112986317A CN112986317A CN202110345697.6A CN202110345697A CN112986317A CN 112986317 A CN112986317 A CN 112986317A CN 202110345697 A CN202110345697 A CN 202110345697A CN 112986317 A CN112986317 A CN 112986317A
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- 210000001087 myotubule Anatomy 0.000 title claims abstract description 56
- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims description 19
- 238000011056 performance test Methods 0.000 claims description 2
- 238000004154 testing of material Methods 0.000 abstract description 2
- 210000003205 muscle Anatomy 0.000 description 8
- 230000000930 thermomechanical effect Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to the technical field of material testing, and discloses a testing device for thermally driving artificial muscle fibers and an application method thereof, wherein the device comprises the following components: a base; the lifting mechanism is vertically fixed on the base; the upper end of the spring heating ring is fixed on the top of the lifting mechanism, and the bottom end of the spring heating ring is fixed on the base; a load weight fixed to the bottom of the artificial muscle fiber; a temperature controller; the sensor is arranged on the base and positioned below the load weight; a sensor display. The device can meet the driving behavior test of various types of artificial muscle fibers, can perform constant load test on the artificial muscle fibers to obtain signals such as displacement, rotating speed, revolution and the like under thermal driving, and is simple in test operation and reliable in recording result.
Description
Technical Field
The invention relates to the technical field of material testing, in particular to a testing device for thermally driving artificial muscle fibers and an application method thereof.
Background
The artificial muscle fiber is a flexible driver capable of converting external stimuli (such as heat, electricity and light) into mechanical energy to be output, and has wide application prospects in the fields of aerospace, biomaterials, energy storage, soft robots, flexible sensors and the like because the special fiber structure of the artificial muscle fiber is convenient to process into a complex structure (yarns and fabrics).
The driving action of the artificial muscle fiber mainly comprises the forms of extension, contraction, bending, torsion, rotation and the like, so that the testing of the working capacity of the artificial muscle fiber on a target object under a rated load has important significance on the design and application of the artificial muscle fiber. However, the existing material thermo-mechanical analyzers mainly include a dynamic thermo-mechanical analyzer and a static thermo-mechanical analyzer, which can only characterize the stress-strain signal of the material for a single test mode (one of tensile, compressive and bending). Key evaluation parameters such as driving strain, output work, output power, energy conversion efficiency and the like cannot be obtained from a conventional thermomechanical analyzer.
Disclosure of Invention
In order to solve the technical problems, the invention provides a testing device for thermally driving artificial muscle fibers and an application method thereof.
The specific technical scheme of the invention is as follows:
in a first aspect, the present invention provides a test device for thermally driving artificial muscle fibres, comprising:
a base;
the lifting mechanism is vertically fixed on the base;
the upper end of the spring heating ring is fixed at the top of the lifting mechanism, and the bottom end of the spring heating ring is fixed on the base and used for supplying heat to drive artificial muscle fibers to penetrate through the spring heating ring;
a load weight fixed to the bottom of the thermally driven artificial muscle fiber in a test state;
the temperature controller is electrically connected with the spring heating ring;
the sensor is arranged on the base and is positioned right below the load weight;
and the sensor display is electrically connected with the sensor.
The working principle of the testing device provided by the invention is as follows: the upper end and the lower end of the spring heating ring are provided with openings for artificial muscle fibers to penetrate through, and the length of the spring heating ring can be adjusted through the up-and-down displacement of the lifting mechanism. The load weight is hung at the bottom end of the artificial muscle fiber and suspended in the air; the sensor is fixed at the bottom of the vertical line of the load weight and keeps a gap. The artificial muscle fiber is heated under the action of the spring heating ring, the driving temperature of the artificial muscle fiber is set through the temperature controller, and the rotating speed-time curve, the rotating speed-twist curve, the displacement-time curve and the like of the thermally driven artificial muscle fiber are recorded in the heating process.
Compared with the traditional heating wire heating mode, the testing device provided by the invention adopts the spring heating ring, and has the advantages that: firstly, the heating area of the spring heating coil can be adjusted according to actual test requirements, the spring heating coil is stretched, compressed and the spiral angle is changed, and the inner diameter, the length and the like of the heating area can be adjusted; and secondly, the heating power of the spring heating coil can meet various power outputs (100W-2000W), the temperature range is from room temperature to 400 ℃, and the temperature can not be achieved under the condition that the input voltage is not changed by a common heating wire (the temperature of the heating wire needs to be controlled by an adjustable voltage-stabilized power supply).
Preferably, the elevating mechanism includes: a vertical rod, an adjustable fixing clamp and a fiber fixing part; the vertical rod is vertically fixed on the base, the adjustable fixing clamp is arranged on the vertical rod and can move up and down along the vertical rod, and the upper end of the spring heating ring is fixed on the adjustable fixing clamp; the fiber fixing component is fixed on the adjustable fixing clamp.
Under the structure, the length of the spring heating ring can be adjusted by adjusting the vertical displacement of the fixing clamp on the vertical rod.
Preferably, the inner diameter of the spring heating ring is 5-50mm, the height is 100-400mm, the number of turns is 5-50 turns, the working voltage is 220V, and the power is 100-2000W.
Preferably, a K-type thermocouple connected with a temperature controller is arranged in the spring wire of the spring heating coil.
Preferably, the temperature controller has an adjustable temperature range of room temperature to 400 ℃.
Preferably, the sensor includes one or more of a rotational speed sensor, a number of revolutions sensor, and a displacement sensor.
The sensors can be used independently or in combination to test various driving behaviors.
Preferably, the sensor is a non-contact laser sensor.
Preferably, the load weight is a standard weight of F2 grade, the calibration precision is 0.1-0.01g, and the weight mass is one or more of 1g, 2g, 5g, 10g, 20g, 50g, 100g, 200g, 500g and 1000 g.
In a second aspect, the present invention provides a method for performing a performance test on a thermally driven artificial muscle fiber by using the above test apparatus, comprising the steps of: fixing the upper end of the thermal drive artificial muscle fiber on the fiber fixing part, wherein the thermal drive artificial muscle fiber passes through the spring heating ring and a load weight is hung at the bottom end of the fiber; collecting one or more of the rotational speed, the number of revolutions and the displacement data of the thermally driven artificial muscle fiber; and starting the temperature controller, heating the thermal driving artificial muscle fiber by the spring heating ring, and recording one or more of a rotating speed-time curve, a rotating speed-twist curve and a displacement-time curve of the thermal driving artificial muscle fiber.
Compared with the prior art, the invention has the beneficial effects that:
(1) the testing device disclosed by the invention is simple in combination, key equipment (the spring heating ring and the load weight) can be individually customized and combined according to needs, various sensors can be used independently or in combination, the operation is simple, and the testing device can be used for testing the heat driving capability of the artificial muscle fiber, such as signals of displacement, rotating speed, revolution and the like.
(2) Compared with the traditional heating wire heating, the spring heating coil adopted by the testing device has the advantages that: firstly, the heating area of the spring heating coil can be adjusted according to actual test requirements, the spring heating coil is stretched, compressed and the spiral angle is changed, and the inner diameter, the length and the like of the heating area can be adjusted; secondly, the heating power of the spring heating ring can meet various power outputs, and the temperature range is wide.
Drawings
FIG. 1 is a schematic structural view of a thermally driven artificial muscle fiber testing apparatus according to example 1 of the present invention;
FIG. 2 is a curve of variation of EVA fiber artificial muscle rotation speed with time in the test of the device for testing thermally driven artificial muscle fiber according to example 1 of the present invention;
FIG. 3 is a curve showing the number of revolutions per unit time and the twist of an EVA fiber artificial muscle tested by the apparatus for testing thermally driven artificial muscle fiber according to example 2 of the present invention;
fig. 4 is a graph showing the variation of the contraction displacement of the EVA fiber artificial muscle with time in the test of the device for testing the thermally driven artificial muscle fiber according to example 3 of the present invention.
Reference numerals: the device comprises a base 1, a spring heating ring 2, a load weight 3, a temperature controller 4, a sensor 5, a sensor display 6, a vertical rod 7, an adjustable fixing clamp 8, a fiber fixing part 9 and a thermal driving artificial muscle fiber 10.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
As shown in fig. 1, a test device for thermally driving artificial muscle fibers, includes:
a base 1;
the lifting mechanism comprises a vertical rod 7, an adjustable fixing clamp 8 and a fiber fixing part 9; the upright stanchion is vertically fixed on the base, the adjustable fixing clamp is arranged on the upright stanchion and can move up and down along the upright stanchion, and the fiber fixing part is fixed on the adjustable fixing clamp;
and the upper end of the spring heating ring 2 is fixed on the adjustable fixing clamp, and the bottom end of the spring heating ring is fixed on the base and used for supplying heat to drive the artificial muscle fiber 10 to penetrate through. The inner diameter of the spring heating ring is 20mm, the height is 150mm, the number of turns is 15, the working voltage is 220V, and the power is 1500W. A K-type thermocouple connected with a temperature controller is arranged in a spring wire of the spring heating coil;
a load weight 3 fixed to the bottom of the thermally driven artificial muscle fiber in a test state; the calibration precision is 0.01 g;
the temperature controller 4 is electrically connected with the spring heating ring; the temperature can be adjusted from room temperature to 400 ℃.
The sensor 5 (a non-contact laser rotating speed sensor) is arranged on the base and is positioned right below the load weight;
and the sensor display 6 is electrically connected with the sensor.
Testing of thermally driven artificial muscle fibers:
step one, fixing the upper end of the twisted EVA artificial muscle fiber (with the linear density of 119.48 tex) with the length of 105mm, which is prepared in advance, on an adjustable fixing clamp, and penetrating through the spring heating coil.
And step two, hanging a load weight of 20g at the bottom end of the twisted EVA artificial muscle fiber.
And step three, connecting the rotation speed sensor to the sensor display through a USB data line, and acquiring corresponding rotation speed data.
And step four, switching on a power supply, and setting the target temperature of the temperature controller to be 100 ℃ to start heating.
And step five, recording a rotating speed-time curve of the thermal driving twisted EVA fiber artificial muscle, as shown in figure 2. The twist of the EVA artificial muscle fiber is changed to improve the rotating speed of the artificial muscle fiber, and when the twist is 700turns/m, the rotating speed of the artificial muscle fiber driving the load of 20g reaches the maximum.
Example 2
The difference from the test apparatus in example 1 is that: the sensor is a revolution sensor, the inner diameter of a spring heating ring is 30mm, the length is 250mm, the number of turns is 25, the power is 2000W, and the temperature of the temperature controller is selected within the range of room temperature to 400 ℃.
Testing of thermally driven artificial muscle fibers:
step one, fixing the upper end of the twisted EVA artificial muscle fiber (with the linear density of 119.48 tex) with the length of 200mm, which is prepared in advance, on an adjustable fixing clamp, and penetrating through the spring heating coil.
And step two, the weight of the load hung at the bottom end of the twisted EVA fiber artificial muscle is 40 g.
And step three, connecting the revolution sensor to a sensor display through a USB data line, and acquiring corresponding revolution data.
And step four, switching on a power supply, and setting the target temperature of the temperature controller to be 90 ℃ to start heating.
And step five, recording the thermally-driven twisted EVA fiber artificial muscle, and recording the rotation value of the equidirectional rotation, wherein the equidirectional rotation value of the EVA fiber artificial muscle in unit length is linearly related to the twist degree as shown in figure 3.
Example 3
The difference from the test apparatus in example 1 is that: the sensor is a displacement sensor, the inner diameter of a spring heating ring is 25mm, the length is 180mm, the number of turns is 25, the power is 2000W, and the temperature of the temperature controller is in a temperature selection range of room temperature to 400 ℃.
Testing of thermally driven artificial muscle fibers:
step one, fixing the upper end of the twisted EVA artificial muscle fiber (with the linear density of 119.48 tex) with the length of 150mm, which is prepared in advance, on an adjustable fixing clamp, and penetrating through the spring heating coil.
And step two, respectively suspending load weights of 5g, 10g and 20g at the lower end of the twisted EVA artificial muscle fiber (the twist is 500 turns/m).
And step three, connecting the displacement sensor to the sensor display through a USB data line, and acquiring corresponding displacement data.
And step four, switching on a power supply, and setting the target temperature of the temperature controller to be 100 ℃ to start heating.
And step five, recording the displacement value of the thermal driving twisting EVA artificial muscle fiber driven by thermal contraction load, as shown in figure 4.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (9)
1. A test device for thermally driven artificial muscle fibers, characterized by: the method comprises the following steps:
a base (1);
the lifting mechanism is vertically fixed on the base;
the upper end of the spring heating ring (2) is fixed at the top of the lifting mechanism, and the bottom end of the spring heating ring is fixed on the base and used for supplying heat to drive the artificial muscle fiber (10) to penetrate through;
a load weight (3) fixed to the bottom of the thermally driven artificial muscle fiber in a test state;
the temperature controller (4) is electrically connected with the spring heating ring;
at least one sensor (5) arranged on the base and positioned right below the load weight;
and the sensor display (6) is electrically connected with the sensor.
2. The test apparatus of claim 1, wherein: the lifting mechanism comprises: a vertical rod (7), an adjustable fixing clamp (8) and a fiber fixing part (9); the vertical rod is vertically fixed on the base, the adjustable fixing clamp is arranged on the vertical rod and can move up and down along the vertical rod, and the upper end of the spring heating ring is fixed on the adjustable fixing clamp; the fiber fixing component is fixed on the adjustable fixing clamp.
3. The test device of claim 1 or 2, wherein: the inner diameter of the spring heating ring is 5-50mm, the height is 100-.
4. A test apparatus as claimed in claim 3, wherein: and a K-type thermocouple connected with a temperature controller is arranged in a spring wire of the spring heating coil.
5. The test apparatus of claim 1, wherein: the temperature controller has an adjustable temperature range from room temperature to 400 ℃.
6. The test apparatus of claim 2, wherein: the sensor includes one or more of a rotational speed sensor, a number of revolutions sensor, and a displacement sensor.
7. The test apparatus of claim 6, wherein: the sensor is a non-contact laser sensor.
8. The test apparatus of claim 1, wherein: the calibration accuracy of the load weight is 0.1-0.01 g.
9. A method for performing a performance test on thermally driven artificial muscle fibers using the test device of claim 2, comprising the steps of: fixing the upper end of the thermal drive artificial muscle fiber on the fiber fixing part, wherein the thermal drive artificial muscle fiber passes through the spring heating ring and a load weight is hung at the bottom end of the fiber; collecting one or more of the rotational speed, the number of revolutions and the displacement data of the thermally driven artificial muscle fiber; and starting the temperature controller, heating the thermal driving artificial muscle fiber by the spring heating ring, and recording one or more of a rotating speed-time curve, a rotating speed-twist curve and a displacement-time curve of the thermal driving artificial muscle fiber.
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2021
- 2021-03-31 CN CN202110345697.6A patent/CN112986317A/en active Pending
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