CN106442309B - Detection device and method - Google Patents
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- CN106442309B CN106442309B CN201610781186.8A CN201610781186A CN106442309B CN 106442309 B CN106442309 B CN 106442309B CN 201610781186 A CN201610781186 A CN 201610781186A CN 106442309 B CN106442309 B CN 106442309B
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- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims description 6
- 239000000853 adhesive Substances 0.000 claims abstract description 30
- 230000001070 adhesive effect Effects 0.000 claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims description 24
- 239000002390 adhesive tape Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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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
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
- G01L1/183—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material by measuring variations of frequency of vibrating piezo-resistive material
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
The application discloses a detection device and a detection method. Wherein the apparatus comprises: the friction coefficient sensor is used for detecting the friction coefficient of the surface of the paper money to be detected; and the judging mechanism is connected with the friction coefficient sensor and is used for judging whether the surface of the paper currency to be detected is provided with an adhesive object or not according to the detection result of the friction coefficient. The application solves the technical problem that the detection equipment in the related art is unstable when detecting the target paper money.
Description
Technical Field
The application relates to the field of electronic equipment, in particular to detection equipment and a detection method.
Background
The paper currency sorter is a high and new technology product widely applied in the field of cash register equipment in the financial industry, and can realize the function of distinguishing the new and old, denomination, version and the like of the paper currency.
In daily life, paper currency is easy to be damaged in circulation, paper currency attached with transparent adhesive tape is generated along with the paper currency, if the paper currency is attached with the transparent adhesive tape, the paper currency cannot be identified when the paper currency is stored and taken out on an ATM machine in a self-service mode, and at present, some counterfeit paper currencies are connected through the adhesive tape, and financial equipment such as a traditional paper currency sorter cannot sort and detect the paper currency attached with the transparent adhesive tape.
In the prior art, when detecting paper money stuck with transparent adhesive tape, generally, the paper money is irradiated at a specific angle by adopting a light source, light forms specular reflection on the surface of the transparent adhesive tape, a receiving device is arranged at a proper position on a propagation path of the specular reflection light, high output voltage formed by the specular reflection light can be received, diffuse reflection light formed by the light on the paper money irradiates the receiving device to form low output voltage, and whether the transparent adhesive tape is stuck on the paper money is detected by judging the output voltage. However, this method has the disadvantage that the positions of the light source and the receiving device must be very tightly defined, otherwise the reflected light of the transparent adhesive tape cannot be received by the detecting device, which results in failure of detection, and slight floating of the banknote in the banknote path or wrinkling of the banknote may also result in failure of detection.
In view of the above, this method for detecting whether transparent adhesive tape is stuck on paper money by reflecting light with different materials is unstable and unreliable.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the application provides detection equipment and a detection method, which at least solve the technical problem that the detection equipment in the related art is unstable when detecting target paper money.
According to an aspect of an embodiment of the present application, there is provided a detection apparatus including: the friction coefficient sensor is used for detecting the friction coefficient of the surface of the paper money to be detected; and the judging mechanism is connected with the friction coefficient sensor and is used for judging whether the surface of the paper currency to be tested is provided with an adhesive object or not according to the friction coefficient detection result.
Further, the friction coefficient sensor includes: one or more, wherein in case of a plurality, a plurality of the above friction coefficient sensors are arranged in a linear array.
Further, each of the above friction coefficient sensors includes: the sensing element is used for contacting the paper currency to be detected and receiving the acting force of the paper currency to be detected on the friction coefficient sensor; the elastic sensing element is connected with the sensing element and is used for receiving the acting force signal transmitted by the sensing element and generating corresponding deformation according to the magnitude and the direction of the received acting force signal; the resistance strain gauge is used for generating resistance change when the elastic sensitive element is deformed; and the compensation circuit and the conversion circuit are used for calculating according to the resistance change generated by the resistance strain gauge to obtain the friction coefficient of the surface of the paper money to be measured.
Further, the elastic sensing element includes: the lateral force elastic sensing unit and the vertical force elastic sensing unit are respectively used for receiving the lateral force signal and the vertical force signal transmitted by the sensing element, generating corresponding first deformation according to the magnitude and the direction of the received lateral force signal, and generating corresponding second deformation according to the magnitude and the direction of the received vertical force signal; the resistance strain gauge includes: the device comprises a first resistance strain gauge unit and a second resistance strain gauge unit, wherein the first resistance strain gauge unit is used for generating resistance change when the lateral force elastic sensitive element generates first deformation, and the second resistance strain gauge unit is used for generating resistance change when the vertical force elastic sensitive element generates first deformation.
Further, the resistance strain gauge includes: a substrate; the resistance sensitive grid is used for generating corresponding deformation according to the deformation of the surface of the elastic sensitive element transmitted by the substrate; the surface adhesive is used for protecting the resistance sensitive grid; an adhesive for bonding the resistive sensing grid and the substrate together; and the outgoing line is used for connecting the measuring wire.
Further, the friction coefficient sensor is installed at one side or both sides of the bill path of the bill deposit and withdrawal device.
Further, the banknote deposit and withdrawal device includes: paper currency sorter.
Further, the sticker includes: transparent adhesive tape.
According to another aspect of the present application, there is also provided a detection method including: detecting friction coefficient of the surface of the paper money to be detected by using a friction coefficient sensor; and a judging mechanism connected with the friction coefficient sensor judges whether the surface of the paper currency to be detected is provided with an adhesive object according to the detection result of the friction coefficient.
Further, the judging means judges whether or not the banknote to be measured has an adherend on the surface thereof by: receiving a friction coefficient detection result detected by the friction coefficient sensor; acquiring a friction coefficient threshold value of the paper currency to be detected, wherein the friction coefficient threshold value is preset according to the moving speed of the paper currency and the material of the paper currency; judging whether the friction coefficient detection result exceeds the friction coefficient threshold value or not; if yes, determining that the surface of the paper currency to be measured is provided with an adhesive object.
In an embodiment of the present application, a detection device is used for detecting paper money, where the detection device includes: the friction coefficient sensor is used for detecting the friction coefficient of the surface of the paper money to be detected; the judging mechanism is connected with the friction coefficient sensor and is used for judging whether the surface of the paper currency to be detected is provided with an adhesive object according to the friction coefficient detection result, so that the purpose of detecting whether the paper currency is attached with the adhesive object is achieved, the technical effect of stably and reliably detecting whether the paper currency is attached with the adhesive object is achieved, and the technical problem that the detection equipment in the related art is unstable when detecting the target paper currency is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of an alternative detection device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an alternative friction coefficient sensor unit according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an alternative friction coefficient sensor sensing element stress in accordance with an embodiment of the present application;
FIG. 4 is a schematic illustration of other components of an alternative friction coefficient sensor according to an embodiment of the present application;
FIG. 5 is a schematic diagram of an alternative resistance strain gauge according to an embodiment of the application;
FIG. 6 is a flow chart of an alternative detection method according to an embodiment of the application;
FIG. 7 is a schematic diagram of an alternative array friction coefficient sensor set according to an embodiment of the present application;
FIG. 8 is a schematic diagram of another alternative array friction coefficient sensor set according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
According to an embodiment of the present application, there is provided an embodiment of a detection apparatus, fig. 1 is a detection apparatus according to an embodiment of the present application, as shown in fig. 1, including: the friction coefficient sensor is used for detecting the friction coefficient of the surface of the paper money to be detected; and a judging mechanism (not shown) connected with the friction coefficient sensor for judging whether the surface of the paper currency to be detected has an adhesive object or not according to the detection result of the friction coefficient. Wherein the friction coefficient sensor comprises a sensing element group 1; an elastic sensing element group 2; a resistance strain gauge group 3; a compensation circuit 4; and a conversion circuit 5.
The difference between the friction coefficient of the banknote material and the adhesive material is obvious, so that the friction coefficient sensor is selected to measure the friction coefficient of the banknote surface, and whether the adhesive material is adhered to the banknote surface is judged.
By the above embodiment of the present application, a detection device for detecting paper money is adopted, wherein the detection device comprises: the friction coefficient sensor is used for detecting the friction coefficient of the surface of the paper money to be detected; the judging mechanism is connected with the friction coefficient sensor and is used for judging whether the surface of the paper currency to be detected is provided with an adhesive object according to the friction coefficient detection result, so that the purpose of detecting whether the paper currency is attached with the adhesive object is achieved, the technical effect of stably and reliably detecting whether the paper currency is attached with the adhesive object is achieved, and the technical problem that the detection equipment in the related art is unstable when detecting the target paper currency is solved.
Optionally, the friction coefficient sensor includes: one or more, wherein in case of a plurality, a plurality of the above friction coefficient sensors are arranged in a linear array. By the above embodiment, the specific position and size of the adhesive can be determined due to the array arrangement of the sensing elements.
Optionally, each of the friction coefficient sensors includes: the sensing element is used for contacting the paper currency to be detected and receiving the acting force of the paper currency to be detected on the friction coefficient sensor; the elastic sensing element is connected with the sensing element and is used for receiving the acting force signal transmitted by the sensing element and generating corresponding deformation according to the magnitude and the direction of the received acting force signal; the resistance strain gauge is used for generating resistance change when the elastic sensitive element is deformed; and the compensation circuit and the conversion circuit are used for calculating according to the resistance change generated by the resistance strain gauge to obtain the friction coefficient of the surface of the paper money to be measured.
The sensing element is used for contacting with a measured object, receiving the acting force of the measured object on the sensor and transmitting the acting force to the elastic sensing element, the elastic sensing element generates corresponding deformation according to the magnitude and the direction of the force after receiving the acting force transmitted by the sensing element, the deformation can drive the sensitive grid of the resistance strain gauge to generate deformation, a force signal is converted into the change of resistance, and the friction coefficient of the surface of the measured object is output by the friction coefficient sensor after further calculation of the compensation circuit and the conversion circuit. Fig. 2 is a schematic structural view of one sensor unit of the array type friction force sensor. The friction coefficient sensor unit includes: sensing element 10, elastic sensing element 1, elastic sensing element 2, resistance strain gauge 12, and resistance strain gauge 14.
Specifically, as shown in fig. 4, 1 is a sensing element group of a linear array type friction coefficient sensor group, 31 is paper money to be detected, 32 is other components except sensing elements of the linear array type friction coefficient sensor group, and the sensing element group comprises an elastic sensing element, a resistance strain gauge, a compensation circuit and a conversion circuit. When the banknote 31 to be detected passes through the banknote path at a fixed speed, friction occurs with the sensing element group 1 arranged in a linear array of the sensor group. Each sensing element transmits the received positive pressure vertical to the acting surface of the acting force and the lateral friction parallel to the acting surface of the acting force to the corresponding elastic sensing unit, the elastic sensing unit deforms after being acted by the acting force, the resistance strain gauge arranged on the elastic sensing unit deforms, the resistance strain gauge converts the deformation into the change of resistance, and the corresponding positive pressure and friction values can be calculated after calculation of the compensation circuit and the conversion circuit, so that the friction coefficient of the paper money surface is calculated.
The friction coefficient threshold value of the paper currency is preset through the moving speed of the paper currency and the material of the paper currency, when transparent adhesive tape is stuck on the surface of the paper currency, which is close to one side of the friction coefficient sensor, the friction coefficient of the transparent adhesive tape can be suddenly changed and exceeds the threshold value range, so that the detection device can judge that the transparent adhesive tape is stuck on the paper currency, each sensing element is equivalent to a data acquisition point due to the array arrangement of the sensing elements, and the specific position and the size and the shape of the adhesive tape can be determined by summarizing the position information of the acquisition points and the change information of the friction coefficient. The density of sensing elements of embodiments of the present application may be varied such that as the density of sensing elements increases, the accuracy of detection, i.e., the detection resolution, increases.
Optionally, the elastic sensing element includes: the lateral force elastic sensing unit and the vertical force elastic sensing unit are respectively used for receiving the lateral force signal and the vertical force signal transmitted by the sensing element, generating corresponding first deformation according to the magnitude and the direction of the received lateral force signal, and generating corresponding second deformation according to the magnitude and the direction of the received vertical force signal; the resistance strain gauge includes: the device comprises a first resistance strain gauge unit and a second resistance strain gauge unit, wherein the first resistance strain gauge unit is used for generating resistance change when the lateral force elastic sensitive element generates first deformation, and the second resistance strain gauge unit is used for generating resistance change when the vertical force elastic sensitive element generates first deformation.
As shown in fig. 2, the sensing element 10 is the part of the sensor unit in contact with the object to be measured, which is operative to receive the measured force signal and to transmit the signal to the elastic sensing unit. The elastic sensing unit 1, the elastic sensing unit 2 is a lateral acting force elastic sensing unit and a vertical acting force sensing unit respectively, the lateral acting force signal and the vertical acting force signal are received respectively, the elastic strain element of the elastic sensing unit generates deformation under the action of lateral or vertical acting force, the resistance strain gauge 12.14 is arranged at the maximum strain position of the elastic sensing element, the micro deformation of the elastic strain element can deform the sensitive grid of the resistance strain gauge along with the deformation, the deformation can cause the resistance of the resistance strain gauge to change, the change of the resistance is measured, and the lateral acting force value and the vertical acting force value between the sensing element and a detected object can be calculated through the calculation of the compensation circuit and the conversion circuit. According to the formulaThe friction coefficient of the surface of the measured object can be calculated. Where μ is the coefficient of friction, f is the friction, i.e., the lateral force, and N is the positive pressure, i.e., the perpendicular force.
When the sensing element contacts with the object to be measured and moves relatively, a positive pressure perpendicular to the acting surface and a friction force parallel to the acting surface are generated between the sensing element and the object to be measured, as shown in fig. 3, wherein the relative movement speed of the sensing element 10 and the object to be measured 31 is v, the positive pressure generated between the sensing element and the object to be measured is N, the friction force is f. The deformation is perceived by the resistance strain gauge and converted into resistance change, and the friction coefficient of the surface of the measured object in contact with the sensing element can be calculated through the compensation circuit and the conversion circuit.
Optionally, the resistance strain gauge includes: a substrate; the resistance sensitive grid is used for generating corresponding deformation according to the deformation of the surface of the elastic sensitive element transmitted by the substrate; the surface adhesive is used for protecting the resistance sensitive grid; an adhesive for bonding the resistive sensing grid and the substrate together; and the outgoing line is used for connecting the measuring wire.
Specifically, as shown in fig. 5, the resistance strain gauge used in the embodiment of the application mainly comprises five parts of a resistance sensitive grid 21, a substrate 22, a surface adhesive (or covering layer) 23, an adhesive 24 and an outgoing line 25, and is arranged on the surface of an elastic force sensitive unit, wherein the substrate 22 is an intermediate medium for transmitting the strain on the surface of the sensor elastic force sensitive unit to the resistance sensitive grid 21 and plays an insulating role between the sensitive grid and the elastic force sensitive unit, the surface adhesive 23 plays a role in protecting the sensitive grid, the adhesive 24 is used for bonding the sensitive grid and the substrate together, and the outgoing line 25 is used for connecting a measuring wire. The resistance sensitive grid can convert the dependent variable into resistance change, when the elastic sensitive unit is deformed by external force, the elastic sensitive grid of the resistance strain gauge deforms along with the deformation to generate a certain dependent variable, the dependent variable is converted into resistance change by the resistance sensitive grid and is output through the outgoing line, and the magnitude of the dependent variable stressed by the elastic sensitive element can be obtained after the calculation of the compensation circuit and the conversion circuit, wherein the calculation formula is as follows:wherein->The resistance change rate of the resistance sensitive gate is K, the material sensitivity coefficient of the sensitive gate is the stressed strain quantity.
The embodiment of the application selects the metal resistance strain gauge, and the sensitive gate is made of metal material. A metallic resistance strain gauge is a sensing element based on the resistance-strain effect, which is a physical phenomenon in which the resistance of a metallic conductor changes when the conductor is deformed (stretched or shortened) by a force. When the metal resistance wire is subjected to axial tension, its length increases and its cross section becomes smaller, causing an increase in resistance. Conversely, when it is subjected to an axial pressure, it results in a decrease in electrical resistance.
Alternatively, the resistance strain gauge is a semiconductor resistance strain gauge, which is a sensitive element made of a piezoresistive effect of a semiconductor material, and the piezoresistive effect is a phenomenon that when a semiconductor crystal material is stressed in a certain direction to deform, the resistivity of the material changes. Compared with metal resistance strain gauges, the strain gauge has the advantages of large sensitivity coefficient, small mechanical hysteresis and creep, and high frequency response, but the sensitivity coefficient is large with temperature change.
Optionally, the friction coefficient sensor is mounted on one side or both sides of a banknote path of the banknote deposit and withdrawal device. Optionally, the banknote deposit and withdrawal device includes: paper currency sorter. Optionally, the adhesive article includes: transparent adhesive tape.
According to another aspect of the present application, there is also provided a detection method, as shown in fig. 6, including the steps of: s602, detecting a friction coefficient of the surface of the paper money to be detected by using a friction coefficient sensor;
s604, a judging mechanism connected with the friction coefficient sensor judges whether the surface of the paper currency to be tested has an adhesive object or not according to the detection result of the friction coefficient.
Alternatively, the judging means judges whether or not the banknote to be measured has an adherend on the surface thereof by: receiving a friction coefficient detection result detected by the friction coefficient sensor; acquiring a friction coefficient threshold value of the paper currency to be detected, wherein the friction coefficient threshold value is preset according to the moving speed of the paper currency and the material of the paper currency; judging whether the friction coefficient detection result exceeds the friction coefficient threshold value or not; if yes, determining that the surface of the paper currency to be measured is provided with an adhesive object.
As shown in fig. 7, 1a and 1b are sensing elements of upper and lower linear array type friction coefficient sensor groups, 31 is a banknote to be detected, and 32a and 32b are other members of the upper and lower linear array type friction coefficient sensor groups except the sensing elements, respectively. A plurality of friction coefficient sensor units can be utilized to form a linear array type friction coefficient sensor group, the sensor group is arranged on one side or two sides of a banknote passing channel of a financial appliance such as a sorter, when a banknote passes through the banknote passing channel at a fixed speed, friction is generated between the sensor group and sensing elements arranged in a linear array type of the linear array type friction coefficient sensor group, friction coefficients of corresponding positions on the banknote can be collected by the linear array type friction coefficient sensor group, a dynamic friction coefficient threshold value of the banknote is preset through the moving speed of the banknote and the material of the banknote, when the transparent adhesive tape is attached to the banknote, the friction coefficient of the transparent adhesive tape can be suddenly changed and exceeds a threshold range, so that the machine can judge that the transparent adhesive tape is attached to the banknote, and the specific position and the size of the adhesive tape can be determined due to the array arrangement of the sensing elements, and the accuracy of detection, namely the resolution can be changed by adjusting the density of the sensing elements.
In order to detect more conveniently, a paper money guiding device can be added, a paper money channel is formed by adopting two opposite linear array friction coefficient sensor groups, and paper money guiding devices are arranged on two sides of the channel, so that paper money is prevented from being blocked when passing through the paper feeding channel. As shown in fig. 8, 1a and 1b are sensing elements of upper and lower linear array type friction coefficient sensor groups, respectively, 31 is a banknote to be detected, 32a and 32b are other members of the upper and lower linear array type friction coefficient sensor groups except the sensing elements, respectively, and 33 is a banknote guiding device.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (8)
1. A detection apparatus, characterized by comprising:
the friction coefficient sensor is used for detecting the friction coefficient of the surface of the paper money to be detected;
the judging mechanism is connected with the friction coefficient sensor and is used for judging whether the surface of the paper currency to be detected is provided with an adhesive object or not according to the friction coefficient detection result;
wherein the friction coefficient sensor includes: one or more, wherein in case of a plurality, a plurality of the friction coefficient sensors are arranged in a linear array, each of the friction coefficient sensors comprising:
the sensing element is used for contacting with the paper currency to be detected and receiving the acting force of the paper currency to be detected on the friction coefficient sensor;
the elastic sensing element is connected with the sensing element and is used for receiving the acting force signal transmitted by the sensing element and generating corresponding deformation according to the magnitude and the direction of the received acting force signal;
a resistance strain gauge for generating resistance change when the elastic sensing element is deformed, the resistance strain gauge being installed at a maximum strain of the elastic sensing element;
and the compensation circuit and the conversion circuit are used for calculating according to the resistance change generated by the resistance strain gauge to obtain the friction coefficient of the surface of the paper money to be measured.
2. The apparatus of claim 1, wherein the device comprises a plurality of sensors,
the elastic sensing element comprises: the lateral force elastic sensing unit and the vertical force elastic sensing unit are respectively used for receiving the lateral force signal and the vertical force signal transmitted by the sensing element, generating corresponding first deformation according to the magnitude and the direction of the received lateral force signal, and generating corresponding second deformation according to the magnitude and the direction of the received vertical force signal;
the resistance strain gauge includes: the device comprises a first resistance strain gauge unit and a second resistance strain gauge unit, wherein the first resistance strain gauge unit is used for generating resistance change when the lateral force elastic sensitive element generates first deformation, and the second resistance strain gauge unit is used for generating resistance change when the vertical force elastic sensitive element generates first deformation.
3. The apparatus of claim 2, wherein the resistance strain gauge comprises:
a substrate;
the resistance sensitive grid is used for generating corresponding deformation according to the deformation of the surface of the elastic sensitive element transmitted by the substrate;
the surface adhesive is used for protecting the resistance sensitive grid;
an adhesive for bonding the resistive sensing grid and the substrate together;
and the outgoing line is used for connecting the measuring wire.
4. The apparatus of claim 1 wherein the friction coefficient sensor is mounted on one or both sides of a banknote path of a banknote deposit and withdrawal apparatus.
5. The apparatus of claim 4, wherein the banknote deposit and withdrawal device comprises: paper currency sorter.
6. The apparatus according to any one of claims 1 to 5, wherein the sticker comprises: transparent adhesive tape.
7. A method of detection comprising:
detecting friction coefficient of the surface of the paper money to be detected by using a friction coefficient sensor;
a judging mechanism connected with the friction coefficient sensor judges whether the surface of the paper currency to be detected is provided with an adhesive object or not according to a friction coefficient detection result;
wherein the friction coefficient sensor includes: one or more, wherein in case of a plurality, a plurality of the friction coefficient sensors are arranged in a linear array, each of the friction coefficient sensors comprising:
the sensing element is used for contacting with the paper currency to be detected and receiving the acting force of the paper currency to be detected on the friction coefficient sensor;
the elastic sensing element is connected with the sensing element and is used for receiving the acting force signal transmitted by the sensing element and generating corresponding deformation according to the magnitude and the direction of the received acting force signal;
a resistance strain gauge for generating resistance change when the elastic sensing element is deformed, the resistance strain gauge being installed at a maximum strain of the elastic sensing element;
and the compensation circuit and the conversion circuit are used for calculating according to the resistance change generated by the resistance strain gauge to obtain the friction coefficient of the surface of the paper money to be measured.
8. The method according to claim 7, wherein the judging means judges whether or not there is an adherend on the surface of the banknote under test by:
receiving a friction coefficient detection result detected by the friction coefficient sensor;
acquiring a friction coefficient threshold value of the paper currency to be detected, wherein the friction coefficient threshold value is preset according to the moving speed of the paper currency and the material of the paper currency;
judging whether the friction coefficient detection result exceeds the friction coefficient threshold value or not;
if yes, determining that the surface of the paper currency to be detected is provided with an adhesive object.
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| DE8532599U1 (en) * | 1985-11-18 | 1986-02-20 | Bohmter Maschinenfabrik Gmbh & Co Kg, 4508 Bohmte | Shredding device |
| JP2002002472A (en) * | 2000-06-16 | 2002-01-09 | Bridgestone Corp | Estimation method and device for road surface friction coefficient, road surface state estimation device, road surface slip alarm, and vehicle control method and device |
| CN101000529A (en) * | 2006-01-13 | 2007-07-18 | 北京汇冠新技术有限公司 | Device for detecting touch of infrared touch screen |
| JP2007315757A (en) * | 2006-05-23 | 2007-12-06 | Nippon Denshi Kogyo Kk | Stress detection sensor |
| JP2009300174A (en) * | 2008-06-11 | 2009-12-24 | Canon Inc | Surface property discrimination device, sheet material discrimination device, and image forming apparatus |
| CN101520406A (en) * | 2009-04-08 | 2009-09-02 | 东华大学 | Bionic sensor for testing dynamic friction of fabric |
| CN102556714A (en) * | 2010-12-31 | 2012-07-11 | 北京兆维电子(集团)有限责任公司 | Deviation rectification device |
| CN206020243U (en) * | 2016-08-31 | 2017-03-15 | 威海华菱光电股份有限公司 | Testing equipment |
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