CN112462435A - Method and device for detecting metal foreign matters in tire - Google Patents
Method and device for detecting metal foreign matters in tire Download PDFInfo
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- CN112462435A CN112462435A CN202011473303.7A CN202011473303A CN112462435A CN 112462435 A CN112462435 A CN 112462435A CN 202011473303 A CN202011473303 A CN 202011473303A CN 112462435 A CN112462435 A CN 112462435A
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- 238000000034 method Methods 0.000 title abstract description 18
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- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 17
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- 238000005516 engineering process Methods 0.000 abstract description 2
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
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Abstract
The invention provides a method and a device for detecting metal foreign matters in a tire, which relate to the technical field of vehicle detection and solve the problems of low detection efficiency and low detection accuracy caused by the fact that the detection of the conditions of tire tack and the like in the prior art is mainly confirmed by human eyes and products and technologies for specially detecting the tire tack of a passenger vehicle are not provided. The invention changes the method that the industry can only confirm by human eyes, and can realize non-contact automatic detection of whether the tyre is nailed or not.
Description
Technical Field
The invention relates to the technical field of vehicle detection, in particular to a method and a device for detecting metal foreign bodies in tires.
Background
The detection of the conditions of tire prick and the like is mainly confirmed by human eyes, and products and technologies special for detecting the tire prick and the like of passenger cars are not provided, so that the problems of low detection efficiency and low detection accuracy are caused.
Disclosure of Invention
The invention aims to design a method and a device for detecting metal foreign matters in a tire, which aim to solve the problem that the tire prick can only be determined by a method determined by human eyes in the prior art, change the method which can only be determined by human eyes in the industry and realize non-contact detection on whether the tire is pricked.
The invention is realized by the following technical scheme:
the invention provides a tire metal foreign body detection method, which utilizes a metal coil and an oscillation circuit to generate a sinusoidal signal with fixed frequency and amplitude influenced by the distance between metal and the metal coil and the size of the metal;
clipping the sinusoidal signal, and extracting a threshold wave peak of the sinusoidal signal to form a clipped signal;
carrying out wave detection processing on the clipping signal to convert the clipping signal into a flat wave signal and outputting the flat wave signal;
the tire is close to the metal coil, and when a flat wave signal appears in a sudden downward depression, the condition that the tire is punctured is indicated.
When the method is adopted, a small part of the top of the sinusoidal signal is extracted and converted into flat waves through clipping, and whether the tire is punctured or not is directly judged through the concave change of the flat wave signal, so that the method which can only be confirmed by human eyes in the industry is changed, and the non-contact automatic detection of whether the tire is punctured or not can be realized.
Further, the invention is better realized by the following steps: the flat wave signal is converted into a digital signal through an analog-to-digital conversion circuit, the digital signal is input into a computer for operation processing, and whether the tire has a nail pricking condition or not is automatically obtained.
When the structure is arranged, whether the tire is punctured or not can be automatically detected through computer operation processing.
The invention provides a tire metal foreign body detection device on the basis of the method, which comprises a detection circuit, wherein the detection circuit comprises a metal coil, an oscillation circuit, a signal acquisition circuit, a clipping circuit and a detection circuit which are sequentially connected;
the metal coil is connected with the oscillating circuit and used for generating a sinusoidal signal with fixed frequency and amplitude influenced by the distance between the metal and the metal coil;
the signal acquisition circuit is used for extracting the sinusoidal signal and transmitting the sinusoidal signal into the clipping circuit, and the clipping circuit is used for clipping the sinusoidal signal so as to extract a threshold peak of the sinusoidal signal to form a clipped signal and transmitting the clipped signal into the detection circuit;
the wave detection circuit is used for converting the clipping signal into a flat wave signal and outputting the flat wave signal.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the detection circuit further comprises a first signal amplification circuit connected with the signal acquisition circuit and the clipping circuit, and the first signal amplification circuit is used for amplifying the sinusoidal signal and transmitting the amplified sinusoidal signal into the clipping circuit.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the detection circuit further comprises a second signal amplification circuit which is connected with the clipping circuit and the detection circuit, and the second signal amplification circuit is used for amplifying the clipping signal and transmitting the amplified clipping signal into the detection circuit.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the detection circuit further comprises an analog-digital conversion circuit and a computer which are connected, the detection circuit is connected with the analog-digital conversion circuit, the analog-digital conversion circuit is used for converting flat wave signals input by the detection circuit into digital signals and transmitting the digital signals to the computer, and the computer is used for carrying out operation processing on the digital signals and obtaining whether the tire has a nail pricking condition.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the detection circuit further comprises a third signal amplification circuit connected with the detection circuit and the analog-to-digital conversion circuit.
In order to further better implement the invention, the following arrangement structure is particularly adopted: still include PMKD, PMKD's top surface is installed detection circuitry the metal coil.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the fixed bottom plate is provided with a plurality of metal coils, and all the metal coils are arranged along the length direction of the fixed bottom plate.
With the above arrangement, the plurality of metal coils are arranged to cover the tire more.
In order to further better implement the invention, the following arrangement structure is particularly adopted: all the metal coils are arranged in a staggered mode along the length direction of the fixed bottom plate.
When the structure is adopted, all the metal coils are arranged in a staggered mode along the length direction of the fixed base plate, and the defect that the magnetic field center of each metal coil is strong and the edge of each metal coil is weak can be overcome by the arrangement.
The invention has the following advantages and beneficial effects:
in the invention, a very small part of the top of the sinusoidal signal is extracted and converted into flat waves through clipping, and whether the tire is punctured or not is directly judged through the concave change of the flat wave signal, so that a method which can only be confirmed by human eyes in the industry is changed, and the non-contact automatic detection of whether the tire is punctured or not can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a detection circuit and a signal change process of a tire metal foreign matter detection method;
FIG. 2 is a schematic view of a metal probe plate;
FIG. 3 is a schematic view showing the positional relationship between a tire and a metal detecting plate;
FIG. 4 is a schematic illustration of detecting a tire tack condition;
labeled as:
01. a metal coil; 1. an oscillation circuit; 2. a signal acquisition circuit; 3. a first signal amplifying circuit; 4. A clipping circuit; 5. a second signal amplifying circuit; 6. a detection circuit; 7. a third signal amplifying circuit; 8. an analog-to-digital conversion circuit; 9. a computer; 10. and fixing the bottom plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
Example 1:
a tire metal foreign matter detection method aims to solve the problem that in the prior art, a tire prick nail can only be determined by a human eye determination method, a method which can only be determined by a human eye in the industry is changed, and non-contact detection of whether the tire is pricked or not can be achieved, as shown in figures 1, 2, 3 and 4:
the tire metal foreign matter detection method detects the pricking condition of the tire through a detection circuit, and the detection circuit basically comprises a metal coil 01, an oscillating circuit 1, a signal acquisition circuit 2, a clipping circuit 4 and a detection circuit 6 which are connected in sequence. The connection of the metal coil 01 to the oscillating circuit 1 generates a sinusoidal signal having a fixed frequency, but the amplitude of the sinusoidal signal is affected by the metal, and when metal is close to the metal coil, the sinusoidal signal varies accordingly due to the distance between the metal and the metal coil and the size of the metal itself. Signal acquisition circuit 2 is arranged in drawing sinusoidal signal and introduces into clipping circuit 4 on next step, adopt clipping circuit 4 to draw out the little partial threshold wave crest in top of sinusoidal signal and draw out and filter the direct current part in the signal through the electric capacity again, and introduce into in detection circuit 6 on next step after amplifying the signal with amplifier circuit in order to improve detectivity, detection circuit 6 refers to the detection principle of radio, it is exactly the metal signal that detects to filter the remaining with fixed high frequency carrier, can be with clipping signal conversion flat wave, when the metal is close to, the flat wave has a downward sunken suddenly.
The method comprises the steps of generating a sinusoidal signal with fixed frequency and amplitude influenced by the distance between metal and a metal coil and the size of the metal by using the metal coil and an oscillating circuit, carrying out clipping processing on the sinusoidal signal to extract a threshold peak of the sinusoidal signal to form a clipped signal, carrying out detection processing on the clipped signal to convert the clipped signal into a flat wave signal (an analog quantity signal after the clipped signal is detected), outputting the flat wave signal, and judging whether the tire is nailed or not by observing the change of the flat wave signal. During detection, the tire is close to the metal coil, and when a flat wave signal appears in a sudden downward depression, the condition that the tire is punctured is indicated. When the method is adopted, a small part of the top of the sinusoidal signal is extracted and converted into flat waves through clipping, and whether the tire is punctured or not is directly judged through the occurrence of the depression change of the flat wave signal, so that the method that the industry can only confirm by human eyes is changed, the non-contact automatic detection of whether the tire is punctured or not can be realized, and the detection efficiency and the detection accuracy are higher.
Example 2:
the embodiment is further optimized on the basis of the embodiment, and can realize non-contact automatic detection of whether the tire is nailed or not:
the tire metal foreign matter detection method detects the pricking condition of the tire through a detection circuit, and the detection circuit basically comprises a metal coil 01, an oscillating circuit 1, a signal acquisition circuit 2, a clipping circuit 4, a detection circuit 6, an analog-digital conversion circuit 8 and a computer 9 which are connected in sequence. The flat wave output by the detection circuit 6 is transmitted to an analog-digital conversion circuit to be converted into a digital signal, the computer 9 receives the digital signal and then carries out PC operation processing through a CPU, and after the processing is finished, whether the tire has a nail pricking condition can be automatically obtained through display. The computer 9 can automatically detect the tire to obtain whether the tire is punctured or not through operation processing.
Example 3:
the present embodiment is a tire metal foreign matter detection apparatus provided on the basis of the above embodiments, and particularly adopts the following arrangement structure:
the tire metal foreign matter detection device comprises a detection circuit and a fixed base plate 10, wherein the detection circuit comprises a metal coil 01, an oscillation circuit 1, a signal acquisition circuit 2, a first signal amplification circuit 3, a clipping circuit 4, a second signal amplification circuit 5, a detection circuit 6, a third signal amplification circuit 7, an analog-to-digital conversion circuit 8 and a computer 9 which are sequentially connected. The fixed base plate 10 is a rectangular jointed plate, and the top surface of the fixed base plate is provided with a metal coil 01 of a detection circuit.
Preferably, the fixing base plate 10 may be provided with a plurality of metal coils 01, each metal coil corresponds to one detection circuit, all the metal coils 01 are arranged along the length direction of the fixing base plate 10, and the plurality of metal coils 01 are arranged to cover more tire areas.
Example 4:
the present embodiment is a tire metal foreign matter detection apparatus provided on the basis of the above embodiments, and particularly adopts the following arrangement structure:
all the metal coils 01 are arranged in a staggered manner along the length direction of the fixed base plate 10. This arrangement makes it possible to compensate for the disadvantage that the magnetic field center of each metal coil 01 is strong and weak.
When the device is used, the fixed bottom plate 10 is placed under the wheel carrier, the wheel is placed on the wheel carrier and suspended above the metal coil 01, and the wheel is rotated for one circle to enable the wheel surface to completely sweep the metal coil 01 of the fixed bottom plate 10. The metal coil 01 is connected with the oscillating circuit 1 and used for generating a sinusoidal signal which has fixed frequency and amplitude is influenced by the distance between metal and the metal coil, the signal acquisition circuit 2 extracts a weaker sinusoidal signal output by the oscillating circuit 1, the weaker sinusoidal signal is transmitted into the first signal amplification circuit 3 and then is amplified, the weaker sinusoidal signal is transmitted into the chopping circuit 4, the chopping circuit 4 carries out chopping processing on the sinusoidal signal so as to extract a threshold crest of the sinusoidal signal to form a chopped signal, the chopped signal is transmitted into the second signal amplification circuit 5 and then is amplified, the chopped signal is transmitted into the detection circuit 6, the detection circuit 6 converts the chopped signal into a flat wave signal and transmits the flat wave signal into the third signal amplification circuit 7 and then transmits the flat wave signal into the analog-to-digital conversion circuit 8, the analog-to-digital conversion circuit 8 converts the flat wave signal input by the third signal amplification circuit 7 into a digital signal and then transmits the digital signal into the computer 9.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A tire metal foreign matter detection method is characterized in that:
generating a sinusoidal signal with fixed frequency and amplitude influenced by the distance between the metal and the metal coil and the size of the metal by using the metal coil and the oscillation circuit;
clipping the sinusoidal signal, and extracting a threshold wave peak of the sinusoidal signal to form a clipped signal;
carrying out wave detection processing on the clipping signal to convert the clipping signal into a flat wave signal and outputting the flat wave signal;
the tire is close to the metal coil, and when a flat wave signal appears in a sudden downward depression, the condition that the tire is punctured is indicated.
2. The tire metallic foreign matter detection method according to claim 1, characterized in that: the flat wave signal is converted into a digital signal through an analog-to-digital conversion circuit, the digital signal is input into a computer for operation processing, and whether the tire has a nail pricking condition or not is automatically obtained.
3. A tire metal foreign matter detection device which characterized in that: the device comprises a detection circuit, wherein the detection circuit comprises a metal coil (01), an oscillation circuit (1), a signal acquisition circuit (2), a clipping circuit (4) and a detection circuit (6) which are sequentially connected;
the metal coil (01) is connected with the oscillating circuit (1) and is used for generating a sinusoidal signal with fixed frequency and amplitude influenced by the distance between the metal and the metal coil;
the signal acquisition circuit (2) is used for extracting the sinusoidal signal and transmitting the sinusoidal signal into the clipping circuit (4), and the clipping circuit (4) is used for carrying out clipping processing on the sinusoidal signal so as to extract a threshold peak of the sinusoidal signal to form a clipped signal and transmitting the clipped signal into the detection circuit (6);
the wave detection circuit (6) is used for converting the clipping signal into a flat wave signal and outputting the flat wave signal.
4. A tire metallic foreign matter detection apparatus according to claim 3, wherein: the detection circuit further comprises a first signal amplification circuit (3) connected with the signal acquisition circuit (2) and the clipping circuit (4), wherein the first signal amplification circuit (3) is used for amplifying the sinusoidal signal and transmitting the amplified sinusoidal signal into the clipping circuit (4).
5. The tire metallic foreign matter detection device according to claim 4, wherein: the detection circuit further comprises a second signal amplification circuit (5) connected with the clipping circuit (4) and the detection circuit (6), wherein the second signal amplification circuit (5) is used for amplifying the clipping signal and transmitting the amplified clipping signal into the detection circuit (6).
6. The tire metallic foreign matter detection apparatus according to any one of claims 3 to 5, wherein: the detection circuit further comprises an analog-digital conversion circuit (8) and a computer (9) which are connected, the detection circuit (6) is connected with the analog-digital conversion circuit (8), the analog-digital conversion circuit (8) is used for converting flat wave signals input by the detection circuit (6) into digital signals and transmitting the digital signals into the computer (9), and the computer (9) is used for carrying out operation processing on the digital signals and obtaining whether the tire has a nail pricking condition.
7. The tire metallic foreign matter detection device according to claim 6, wherein: the detection circuit further comprises a third signal amplification circuit (7) connected with the detection circuit (6) and the analog-to-digital conversion circuit (8).
8. A tire metallic foreign matter detection apparatus according to claim 3, wherein: still include PMKD (10), the top surface of PMKD (10) is installed detection circuitry metal coil (01).
9. The tire metallic foreign matter detection device according to claim 8, wherein: the fixed base plate (10) is provided with a plurality of metal coils (01), and all the metal coils (01) are arranged along the length direction of the fixed base plate (10).
10. The tire metallic foreign matter detection device according to claim 9, wherein: all the metal coils (01) are arranged in a staggered mode along the length direction of the fixed bottom plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011473303.7A CN112462435A (en) | 2020-12-15 | 2020-12-15 | Method and device for detecting metal foreign matters in tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011473303.7A CN112462435A (en) | 2020-12-15 | 2020-12-15 | Method and device for detecting metal foreign matters in tire |
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| CN112462435A true CN112462435A (en) | 2021-03-09 |
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| CN202011473303.7A Pending CN112462435A (en) | 2020-12-15 | 2020-12-15 | Method and device for detecting metal foreign matters in tire |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB895089A (en) * | 1959-06-18 | 1962-05-02 | Hans Rossner | Apparatus for detecting foreign metallic bodies in pneumatic vehicle tyres |
| JP2000247121A (en) * | 1999-02-24 | 2000-09-12 | Honda Motor Co Ltd | Tire puncture detecting device |
| JP2010091369A (en) * | 2008-10-07 | 2010-04-22 | Yokohama Rubber Co Ltd:The | Metal detection method and system of same |
| CN105116454A (en) * | 2015-09-23 | 2015-12-02 | 哈尔滨市迪沃浦通信技术有限公司 | Novel metal detecting apparatus and detecting method |
| CN207946538U (en) * | 2018-04-11 | 2018-10-09 | 河南师范大学 | A kind of metal detector |
| CN108710151A (en) * | 2018-04-17 | 2018-10-26 | 五邑大学 | A kind of tire metal foreign matter detection system |
| CN108872035A (en) * | 2018-09-18 | 2018-11-23 | 大连海事大学 | A kind of multichannel wear particle detection method and device for dividing multiplexing technology based on phase |
| CN111189908A (en) * | 2020-01-19 | 2020-05-22 | 南昌航空大学 | Profiling flexible array eddy current probe and detection method |
| CN111580173A (en) * | 2020-06-04 | 2020-08-25 | 山东大学 | Metal object detection sensor and detection device |
| CN111669162A (en) * | 2019-03-07 | 2020-09-15 | 阿自倍尔株式会社 | Detection device |
-
2020
- 2020-12-15 CN CN202011473303.7A patent/CN112462435A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB895089A (en) * | 1959-06-18 | 1962-05-02 | Hans Rossner | Apparatus for detecting foreign metallic bodies in pneumatic vehicle tyres |
| JP2000247121A (en) * | 1999-02-24 | 2000-09-12 | Honda Motor Co Ltd | Tire puncture detecting device |
| JP2010091369A (en) * | 2008-10-07 | 2010-04-22 | Yokohama Rubber Co Ltd:The | Metal detection method and system of same |
| CN105116454A (en) * | 2015-09-23 | 2015-12-02 | 哈尔滨市迪沃浦通信技术有限公司 | Novel metal detecting apparatus and detecting method |
| CN207946538U (en) * | 2018-04-11 | 2018-10-09 | 河南师范大学 | A kind of metal detector |
| CN108710151A (en) * | 2018-04-17 | 2018-10-26 | 五邑大学 | A kind of tire metal foreign matter detection system |
| CN108872035A (en) * | 2018-09-18 | 2018-11-23 | 大连海事大学 | A kind of multichannel wear particle detection method and device for dividing multiplexing technology based on phase |
| CN111669162A (en) * | 2019-03-07 | 2020-09-15 | 阿自倍尔株式会社 | Detection device |
| CN111189908A (en) * | 2020-01-19 | 2020-05-22 | 南昌航空大学 | Profiling flexible array eddy current probe and detection method |
| CN111580173A (en) * | 2020-06-04 | 2020-08-25 | 山东大学 | Metal object detection sensor and detection device |
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