CN110411620B - Dynamometer with adjustable threshold value - Google Patents
Dynamometer with adjustable threshold value Download PDFInfo
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- CN110411620B CN110411620B CN201810400391.4A CN201810400391A CN110411620B CN 110411620 B CN110411620 B CN 110411620B CN 201810400391 A CN201810400391 A CN 201810400391A CN 110411620 B CN110411620 B CN 110411620B
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- conductive fiber
- fiber bundle
- bonding layer
- adjustable threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
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Abstract
The invention relates to a dynamometer with an adjustable threshold value, which comprises an upper hard substrate, an upper bonding layer, an upper conductive fiber bundle, a lower bonding layer and a lower hard substrate which are sequentially arranged; two sides of the upper bonding layer are respectively bonded and fixed with the upper hard substrate and the upper conductive fiber bundle, and two sides of the lower bonding layer are respectively bonded and fixed with the lower hard substrate and the lower conductive fiber bundle; an elastic supporting column is arranged between the upper bonding layer and the lower bonding layer; fluffy structures are arranged on the upper conductive fiber bundle and the lower conductive fiber bundle, and the fluffy structures of the upper conductive fiber bundle and the lower conductive fiber bundle are relatively isolated through elastic support columns. The invention has the advantages of convenient and fast use, strong anti-interference capability, adjustable threshold, high resolution and high sensitivity.
Description
Technical Field
The invention relates to the technical field of force measuring equipment, in particular to a dynamometer with an adjustable threshold value.
Background
The stress sensors of existing dynamometers are primarily based on the use of conductive metals. In the pressure sensors of the ergometer, however, some conductive metal sheets form two conductive layers which are separated by a continuous or discontinuous electrically non-conductive or partially conductive interlayer. The properties of a sensor of this construction can be a resistance variable, since the two conductive layers can be brought into contact with each other by pressure, which cannot be avoided by the interlayer, and the two conductive layers return to their original positions once the pressure has been removed. Such sensors are known as resistive sensors. In other types of sensors, the sensor may act as a capacitance variable of a capacitor, with an insulating or non-conductive layer interposed between two conductive layers. Since the distance between the electrodes or conductive layers of such designs also varies, the capacitance between the layers will also vary accordingly, and such sensors become capacitive sensors.
However, most of the sensors of the existing ergometers are based on the use of conductive metals, and no related technical solution is provided for textile sensors. The sensors based on conductive metal can be classified into photo-electric type, pressure-capacitance type and piezoresistive type, however, these sensors are prone to cause measurement errors due to factors such as light interference caused by environment, fog caused by air humidity, etc., and once the dynamometer based on these sensors is out of function, the cost for replacing the whole dynamometer is high.
In addition, the conventional stress sensor has a relatively fixed structural style, so that the stress response threshold is mostly a fixed value. Such sensors are susceptible to interference by ambient noise (vibration, airflow disturbances, etc.) located near their threshold values, causing spurious signals, and a currently preferred solution is to achieve adjustable threshold values, but few sensors are capable of this function.
Disclosure of Invention
Based on this, the invention aims to overcome the defects of the prior art and provide the dynamometer with the adjustable threshold, and the dynamometer has the advantages of convenience and rapidness in use, strong anti-interference capability, adjustable threshold, high resolution and high sensitivity.
In order to achieve the purpose, the invention adopts the technical scheme that:
a dynamometer with an adjustable threshold value comprises an upper hard substrate, an upper bonding layer, an upper conductive fiber bundle, a lower bonding layer and a lower hard substrate which are sequentially arranged; two sides of the upper bonding layer are respectively bonded and fixed with the upper hard substrate and the upper conductive fiber bundle, and two sides of the lower bonding layer are respectively bonded and fixed with the lower hard substrate and the lower conductive fiber bundle; an elastic supporting column is arranged between the upper bonding layer and the lower bonding layer; fluffy structures are arranged on the upper conductive fiber bundle and the lower conductive fiber bundle, and the fluffy structures of the upper conductive fiber bundle and the lower conductive fiber bundle are relatively isolated through elastic support columns.
Therefore, in the dynamometer with the adjustable threshold value, a certain distance d exists between the fluffy structures which are oppositely and separately arranged by the two conductive fiber bundles, and the magnitude of the external stress response threshold value can be artificially adjusted by regulating and controlling the separation distance, so that the sensor can shield the interference caused by some environments or non-detection objects, such as the flow of air, the vibration of the ground and the like. Wherein the resistance based on the conductive fiber filaments is constructed by using the conductive fiber bundles with a fluffy structure; in this dynamometer, the fluffy structures of two conductive fiber bundles contact each other when the elastic support column receives external force, lead to the contact state of the conductive fiber bundle between two fluffy structures to change for the dynamometer has the resistance decline of different degree respectively, thereby the size of the power that the response dynamometer received through measuring the rate of change of resistance. In addition, the dynamometer of the invention also utilizes the conductivity of the conductive fiber, and can be used as a lead without an additional lead, thereby reducing the complexity of the device.
In order to achieve better technical effects, a further technical improvement comprises that the upper conductive fiber bundle and the lower conductive fiber bundle are arranged in parallel relatively.
In order to achieve better technical effects, a further technical improvement comprises that the upper conductive fiber bundle and the lower conductive fiber bundle are respectively electrically connected with an external circuit through leads.
In order to achieve better technical results, a further technical improvement comprises that the fluffy structure comprises a plurality of conductive fiber yarns, and a plurality of gaps are formed among the plurality of conductive fiber yarns.
In order to achieve better technical effects, further technical improvements include that when the upper hard substrate is pressed, the number of conducting current channels formed between the conductive fiber filaments in contact with each other between the fluffy structures and the gaps between the conductive fiber filaments are correspondingly changed along with the change of the external force.
In order to achieve better technical effects, further technical improvements include that the conductive fiber filaments are made of carbon, metal or conductive polymer materials.
In order to achieve better technical effects, further technical improvements include that the upper hard substrate and the lower hard substrate are quartz layers or glass layers.
In order to achieve better technical effects, a further technical improvement comprises that the upper adhesive layer and the lower adhesive layer are glue layers.
In order to achieve better technical effects, further technical improvements include that the elastic support columns are flexible springs, PDMS films, PET films or double-sided tapes.
Drawings
FIG. 1 is a schematic diagram of the construction of an adjustable threshold dynamometer of the present invention;
FIG. 2 is a schematic diagram of the application of the contact of two conductive fiber bundles according to the present invention.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references in mind, one of ordinary skill in the art will understand the principles of the invention and its attendant advantages.
Please refer to fig. 1 and fig. 2.
The dynamometer with adjustable threshold value comprises an upper hard substrate 10, an upper adhesive layer 20, an upper conductive fiber bundle 30, a lower conductive fiber bundle 40, a lower adhesive layer 50 and a lower hard substrate 60 which are arranged in sequence; the two sides of the upper bonding layer 20 are respectively bonded and fixed with the upper hard substrate 10 and the upper conductive fiber bundle 30, and the two sides of the lower bonding layer 50 are respectively bonded and fixed with the lower hard substrate 60 and the lower conductive fiber bundle 40; elastic support columns 70 are arranged between the upper adhesive layer 20 and the lower adhesive layer 50; fluffy structures 80 are arranged on the upper conductive fiber bundle 30 and the lower conductive fiber bundle 40, the fluffy structures of the upper conductive fiber bundle 30 and the lower conductive fiber bundle 40 are relatively isolated through the elastic support columns 70, and when the upper hard substrate 10 is subjected to an external force, the fluffy structures 80 of the two conductive fiber bundles are in contact with each other. Wherein, preferably, the upper conductive fiber bundle 30 and the lower conductive fiber bundle 40 are arranged in parallel; and the upper conductive fiber bundle 30 and the lower conductive fiber bundle 40 are electrically connected to an external circuit through wires, respectively.
Specifically, the fluffy structure 80 includes a plurality of conductive fiber filaments 81, and a plurality of gaps exist between the plurality of conductive fiber filaments 81. When the elastic support columns 70 are subjected to an external force, the number of conduction current channels formed between the conductive fiber filaments 81 in contact with each other between the fluffy structures 80 and the gaps between the conductive fiber filaments 81 are correspondingly changed along with the change of the external force. The conductive fiber 81 is carbon, metal or conductive polymer material.
Wherein, preferably, the upper hard substrate 10 and the lower hard substrate 60 are quartz layers or glass layers; the upper bonding layer 20 and the lower bonding layer 50 are glue layers; the elastic support column 70 is a flexible spring, a PDMS film, a PET film, or a double-sided adhesive tape.
The working principle of the threshold-adjustable dynamometer of the present invention is described below:
first, in the dynamometer with adjustable threshold value of the present invention, a certain distance d exists between the fluffy structures 80 which are arranged oppositely and separately for two conductive fiber bundles, and the magnitude of the external stress response threshold value of the dynamometer can be changed by changing the distance d.
Secondly, the dynamometer of the invention adopts the fluffy structures 80 which are arranged in a relatively isolated way on the upper conductive fiber bundle 30 and the lower conductive fiber bundle 40 as resistance sensors, specifically, adopts a plurality of conductive fiber yarns 81 to form the conductive fiber bundle with the fluffy structure 80, when the elastic support column 70 is compressed by external pressure, the fluffy structures 80 of the two conductive fiber bundles are contacted with each other, the resistance of the resistance sensor is reduced in different degrees along with the increase of the external force, and the change rate of the resistance sensor is in corresponding relation with the magnitude of the external force, which is mainly embodied in that when the two fluffy structures 80 are contacted with each other, the number of conduction current channels formed between the conductive fiber yarns 81 which are contacted with each other and the gap between the conductive fiber yarns 81 are in corresponding relation with the magnitude of the external force; after the external force is removed, the elastic support columns 70 are restored to the original state, and the fluffy structures 80 of the two conductive fiber bundles are isolated from each other and restored to the original position.
Compared with the prior art, in the dynamometer with the adjustable threshold value, a certain distance d exists between the fluffy structures which are oppositely and separately arranged by the two conductive fiber bundles, and the magnitude of the external stress response threshold value can be artificially adjusted by regulating and controlling the separation distance, so that the sensor can shield the interference caused by some environments or non-detection objects, such as the flow of air, the vibration of the ground and the like. Wherein the resistance based on the conductive fiber filaments is constructed by using the conductive fiber bundles with a fluffy structure; in this dynamometer, the fluffy structures of two conductive fiber bundles contact each other when the elastic support column receives external force, lead to the contact state of the conductive fiber bundle between two fluffy structures to change for the dynamometer has the resistance decline of different degree respectively, thereby the size of the power that the response dynamometer received through measuring the rate of change of resistance. In addition, the dynamometer of the invention also utilizes the conductivity of the conductive fiber, can be used as a lead without an additional lead, thereby reducing the requirement of the device on metal materials, and has low cost, convenient replacement and good market popularization value.
The above examples only show some embodiments of the present invention, and the description is specific and detailed, but not to be understood as limiting the scope of the dynamometer with adjustable threshold. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. An adjustable threshold dynamometer, comprising: the device comprises an upper hard substrate, an upper bonding layer, an upper conductive fiber bundle, a lower bonding layer and a lower hard substrate which are arranged in sequence; two sides of the upper bonding layer are respectively bonded and fixed with the upper hard substrate and the upper conductive fiber bundle, and two sides of the lower bonding layer are respectively bonded and fixed with the lower hard substrate and the lower conductive fiber bundle; an elastic supporting column is arranged between the upper bonding layer and the lower bonding layer; fluffy structures are arranged on the upper conductive fiber bundle and the lower conductive fiber bundle, and the fluffy structures of the upper conductive fiber bundle and the lower conductive fiber bundle are relatively isolated through elastic support columns; the size of the external stress response threshold value is regulated and controlled by regulating and controlling the distance between the fluffy structures which are oppositely and separately arranged in the two conductive fiber bundles.
2. An adjustable threshold dynamometer according to claim 1 and including: the upper conductive fiber bundle and the lower conductive fiber bundle are arranged in parallel relatively.
3. An adjustable threshold dynamometer according to claim 1 and including: the upper conductive fiber bundle and the lower conductive fiber bundle are electrically connected with an external circuit through leads respectively.
4. An adjustable threshold dynamometer according to claim 1 and including: the lofty structure comprises a plurality of conductive fiber filaments with a plurality of interstices between the plurality of conductive fiber filaments.
5. An adjustable threshold dynamometer according to claim 4 characterised by: when the upper hard substrate is pressed, the number of conducting current channels formed between the conductive fiber yarns which are mutually contacted among the fluffy structures and the gaps among the conductive fiber yarns are correspondingly changed along with the change of external force.
6. An adjustable threshold dynamometer according to claim 4 characterised by: the conductive fiber yarn is made of carbon, metal or conductive polymer materials.
7. An adjustable threshold dynamometer according to claim 1 and including: the upper hard substrate and the lower hard substrate are quartz layers or glass layers.
8. An adjustable threshold dynamometer according to claim 1 and including: the upper bonding layer and the lower bonding layer are glue layers.
9. An adjustable threshold dynamometer according to claim 1 and including: the elastic support columns are flexible springs, PDMS films, PET films or double-sided adhesive tapes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810400391.4A CN110411620B (en) | 2018-04-28 | 2018-04-28 | Dynamometer with adjustable threshold value |
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| CN201810400391.4A CN110411620B (en) | 2018-04-28 | 2018-04-28 | Dynamometer with adjustable threshold value |
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| CN110411620B true CN110411620B (en) | 2021-05-11 |
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| CN112414435B (en) * | 2020-11-18 | 2022-09-02 | 南通大学 | Multifunctional flexible fabric sensor and use method thereof |
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| CN101393058A (en) * | 2008-11-03 | 2009-03-25 | 东华大学 | Flexible resistance type pressure sensor with machine-weaved structure and use thereof |
| DE102009029021B4 (en) * | 2009-08-31 | 2022-09-22 | Robert Bosch Gmbh | Sensor system for monitoring the surroundings of a mechanical component and a method for controlling and evaluating the sensor system |
| US10401240B2 (en) * | 2014-02-06 | 2019-09-03 | Japan Science And Technology Agency | Sheet for pressure sensor, pressure sensor, and method for producing sheet for pressure sensor |
| CN106197773B (en) * | 2016-07-07 | 2022-06-10 | 燕山大学 | Flexible fingertip pressure sensor and manufacturing method thereof |
| CN106768520B (en) * | 2016-12-28 | 2022-08-12 | 中国科学院深圳先进技术研究院 | Pressure sensor and preparation method thereof |
| CN206269946U (en) * | 2016-12-28 | 2017-06-20 | 中国科学院深圳先进技术研究院 | Pressure sensor |
| KR101805177B1 (en) * | 2017-06-20 | 2017-12-06 | 이남건 | Method and Device for processing 3D air mesh fabric |
| CN107271084A (en) * | 2017-06-22 | 2017-10-20 | 五邑大学 | A kind of flexibility stress sensor and preparation method thereof |
| CN107142554B (en) * | 2017-06-28 | 2023-08-08 | 棉联（北京）网络科技有限公司 | Piezoresistive fiber, yarn, piezoresistive sensor and fabric |
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