JP2004198139A - Object distinguishing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an object distinguishing apparatus capable of accurately distinguishing specific objects regardless of the number or type of the objects. <P>SOLUTION: The object distinguishing apparatus is provided with both a plurality of resonating tags (for example, 1, 2, 3, etc.) for transmitting echo waves (for example, F1, F2, F3, etc.) of frequencies different from one anther and a detecting system 9 for detecting the echo waves transmitted from each resonating tag. In this case, two resonating tags or more are arranged at each of the objects (for example, 11a and 11b), (for example, resonating tags 1, 2, 3 are at the object 11a, and resonating tags 1, 3, and 7 are at the object 11b). By detecting the echo waves (F1, F2, F3, F1, F3, and F7) each transmitted from the resonating tags, the specific objects (for example, 11a and 11b) are distinguished from a plurality of objects. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an object discriminating apparatus for discriminating a specific object from a plurality of objects.
[0002]
[Prior art]
Conventionally, as an object discriminating device of this type, for example, Japanese Patent Application Laid-Open No. H8-44794 discloses a configuration in which a resonance tag provided on a plurality of dishes and a detection system for detecting an echo wave transmitted from each resonance tag are configured. The disclosed device is disclosed. In this conventional apparatus, a specific tableware is distinguished from a plurality of tableware by detecting different types of echo waves transmitted from each resonance tag by a detection system.
[0003]
[Problems to be solved by the invention]
By the way, a resonance circuit composed of an inductance L and a capacitance C is constructed in the resonance tag, and this resonance circuit causes a resonance phenomenon when an electromagnetic wave of a specific frequency is applied, and the resonance frequency is the same as the frequency of the applied electromagnetic wave. It transmits an echo wave of a frequency. Therefore, when a plurality of dishes are determined by detecting an echo wave as in a conventional apparatus, resonance tags that transmit echo waves of different frequencies by the number of the dishes are required. For example, when discriminating 50 types of tableware, 50 resonance tags are required.
[0004]
In this case, it is necessary to select 50 types of frequencies of the electromagnetic waves that resonate the respective resonance tags. However, if the frequencies in the bands close to each other are selected, the frequencies of the echo waves transmitted from the respective resonance tags become close to each other. . For example, if the frequencies of adjacent bands are close to each other, the echo waves are similar to each other, and as a result, different types of tableware may be erroneously determined to be the same.
In order to accurately distinguish many types of tableware, it is sufficient to select frequencies in bands that are separated from each other, but there are various restrictions on available frequencies, and unconditionally use frequencies in a very wide band. It is not possible.
Therefore, the conventional apparatus as described above has a problem that the number and types of identifiable objects are limited.
[0005]
The present invention has been made to solve such a problem, and an object of the present invention is to provide an object discriminating apparatus capable of accurately discriminating a specific object regardless of the number or type of the objects. It is in.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, an object discriminating apparatus that discriminates a specific object from a plurality of objects, and transmits echo waves (for example, F1, F2, F3,...) Having different frequencies from each other. A plurality of types of resonance tags (eg, 1, 2, 3,...) And electromagnetic waves of a predetermined frequency are transmitted to individual objects (eg, 11a, 11b) on which the plurality of types of resonance tags are arranged. And a detection system that determines a specific target object by detecting echo waves transmitted from the plurality of types of resonance tags when the transmission is performed.
[0007]
In the present invention, the detection system causes the plurality of resonance tags (for example, 1,2,3,1,3,7) to emit echo waves (F1, F2, F3, F1, F3, F7). Circuit 15 for transmitting electromagnetic waves (W1, W2, W3, W4, W5, W6, W7, W8) to the plurality of objects, and a frequency registration unit 17 for setting and registering the frequency of the electromagnetic waves A transmission circuit control unit 19 for transmitting, from the transmission circuit, an electromagnetic wave corresponding to each frequency registered in the frequency registration unit, and a combination of two or more frequencies from among the frequencies registered in the frequency registration unit ( For example, f1, f2, f3, f1, f3, f7), an object corresponding frequency registration unit 21 for individually registering the selected two or more frequencies in association with each of the plurality of objects, and the transmission A receiving circuit that receives each echo wave transmitted from the plurality of resonance tags when an electromagnetic wave is transmitted from the circuit; And, the frequency of each echo wave received by the receiving circuit is analyzed based on the frequency registered in the frequency registration unit, the analyzed frequency and the plurality of registered in the object corresponding frequency registration unit. An analysis matching unit 25 that matches the object is provided.
In this case, from the transmission circuit of the detection system, electromagnetic waves corresponding to each frequency registered in the frequency registration unit are sequentially transmitted at a predetermined timing, and when the corresponding electromagnetic wave is transmitted, from each resonance tag, An echo wave having the same frequency as that of the electromagnetic wave is transmitted.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an object discriminating apparatus according to an embodiment of the present invention will be described with reference to FIG.
As shown in FIGS. 1A and 1B, the object discriminating apparatus according to the present embodiment includes a plurality of resonance tags (for example, 1 and 2) that transmit echo waves (for example, F1, F2, F3,...) Having different frequencies from each other. , 2, 3,...) And a detection system 9 for detecting echo waves transmitted from each resonance tag. In this case, two or more resonance tags (for example, the resonance tags 1, 2, and 3 for the object 11a and the resonance tags 1, 3, and 7 for the object 11b) are provided for each object (for example, 11a and 11b). By arranging them and detecting each echo wave (F1, F2, F3, F1, F3, F7) transmitted from these resonance tags, a specific object (for example, 11a, 11b) from a plurality of objects is detected. Can be determined.
Each resonance tag is provided with a resonance circuit 13 including an inductance L and a capacitance C. The resonance circuit 13 generates an electromagnetic wave having a frequency such that the inductive reactance ωL and the capacitance reactance 1 / ωC are equal (for example, When excited by acting W1, W2, W3, W4, W5, W6, W7, W8), a resonance phenomenon occurs, and the same frequency as the acted electromagnetic wave (for example, f1, f2, f3, f4, f5, f6, f7) , f8) (eg, F1, F2, F3, F4, F5, F6, F7, F8).
[0009]
The detection system 9 includes an electromagnetic wave (W1, W2) for transmitting an echo wave (F1, F2, F3, F1, F3, F7) from a plurality of resonance tags (for example, 1, 2, 3, 1, 3, 7). , W3, W4, W5, W6, W7, W8) to a plurality of objects (11a, 11b), and an electromagnetic wave (W1, W2, W3, W4, W5, W6, W7, W8) ) Of a frequency register (f1, f2, f3, f4, f5, f6, f7, f8) and an electromagnetic wave corresponding to each frequency registered in the frequency register 17 15 and a combination of two or more frequencies (for example, f1, f2, f3, f1, f3, f7) from among the frequencies registered in the frequency registration unit 17 and the selected 2 An object-corresponding frequency registration unit 21 for individually associating and registering the above-mentioned frequencies with a plurality of objects (11a, 11b), respectively, and an electromagnetic wave (W1, W2, W3, W4, W5, W6, When W7, W8) are transmitted, multiple resonance tags (1,2,3,1,3,7 Receiving circuit 23 for receiving each of the echo waves (F1, F2, F3, F1, F3, F7) transmitted from the receiver, and the respective echo waves (F1, F2, F3, F1, F3, F7) received by the receiving circuit 23. The frequencies (f1, f2, f3, f1, f3, f7) are analyzed based on the frequencies (f1, f2, f3, f4, f5, f6, f7, f8) registered in the frequency registration unit 17, and the analysis is performed. And an analysis matching unit 25 for matching the obtained frequencies (f1, f2, f3, f1, f3, f7) with a plurality of objects (11a, 11b) registered in the object corresponding frequency registration unit 21. I have.
[0010]
In the present embodiment, as an example of a plurality of objects, 54 playing cards (only the playing card 11a of the heart A and the playing card 11b of the heart 10 are shown in the drawing) are assumed, and each playing card (11a, 11b) is assumed. , Two or more resonance tags (1, 2, 3, 1, 3, 7) are provided.
In order to determine the types of 54 playing cards with the minimum number of resonance tags, eight resonance tags that transmit echo waves having different frequencies from each other are required. In this case, each of the playing cards has three resonance tags. by combining the tags _{(8 C} 3 = 56) may be disposed. In the case of using eleven resonant tag combines the two resonant tag _{(11 C 2} = ₅₅₎ may be disposed on each playing card. The number of the resonance tags to be used and the number of the resonance tags can be arbitrarily set according to the number and types of the objects. By combining two or more resonance tags, the type of the frequency of the electromagnetic wave can be minimized. Thus, the types of the maximum number of objects can be determined.
[0011]
Here, eight resonance tags (only 1, 2, 3, and 7 are shown in the drawing, but actually 1 to 8) are used, and three resonance tags are combined with each of the 54 cards to be arranged. Assume that it is installed. In this case, eight types of frequencies (f1, f2, f3, f4, f5, f6, f7, f8) for exciting eight resonance tags are registered in the frequency registration unit 17 of the detection system 9. In addition, the card corresponding frequency registering section 21 which is an object corresponding frequency registering section selects three kinds of frequencies from the eight kinds of frequencies registered in the frequency registering section 17 in combination, and selects the selected three kinds of frequencies. The frequency is registered in association with each playing card. For example, the heart A is associated with the frequency (f1, f2, f3), and the heart 10 is associated with the frequency (f1, f3, f7). In this case, if the frequency of each echo wave transmitted from the three resonance tags is (f1, f2, f3), the card is determined to be heart A, and each card transmitted from the three resonance tags is also determined. If the frequency of the echo wave is (f1, f3, f7), the card is determined to be the heart 10.
[0012]
Next, the operation of the object discriminating apparatus having the above-described configuration will be described. Here, it is assumed that two playing cards (heart A and heart 10) are determined from the 54 playing cards.
When the determination is started, the transmission circuit 15 of the detection system 9 outputs eight types of frequencies (f1, f2, f3, f4, f5, f6, f7, f8) registered in the frequency registration unit 17. Electromagnetic waves (W1, W2, W3, W4, W5, W6, W7, W8) are sequentially transmitted at a predetermined timing. At this time, from the resonance tags (1, 2, 3, 1, 3, 7) of the two playing cards (heart A, heart 10) 11a, 11b, electromagnetic waves (W1, W2, By the action of W3, W1, W3, W7), the echo waves (F1, F2, F3, F1, F3, F7) of the same frequency (f1, f2, f3, f1, f3, f7) as the electromagnetic waves that acted send.
[0013]
Each of the echo waves (F1, F2, F3, F1, F3, F7) transmitted at this time is sent to the analysis / collation unit 25 via the reception circuit 23 of the detection system 9, and is then transmitted to the analysis / matching unit 25. The frequencies (f1, f2, f3, f3, f7) of the waves (f1, f2, f3, f1, f3, f7) are registered in the frequency registration unit 17 (f1, f2, f3, f4, f5). , f6, f7, f8), the analyzed frequencies (f1, f2, f3, f1, f3, f7) and a plurality of objects (11a, 11b) registered in the card corresponding frequency registration unit 21. ) Is performed. In this case, if the analyzed frequency is a combination of (f1, f2, f3), it is verified that the corresponding card name is Heart A. On the other hand, if the analyzed frequency is a combination of (f1, f3, f7), it is verified that the corresponding card name is the heart 10.
[0014]
The transmission timings of the eight types of electromagnetic waves (W1, W2, W3, W4, W5, W6, W7, W8) at the time of discrimination can be set arbitrarily. As an example, FIG. As shown, the electromagnetic waves (W1, W2, W3, W4, W5, W6, W7, W8) are sequentially transmitted at 5 μs intervals. Since the echo wave cannot be received while these electromagnetic waves are being transmitted, the transmission of the electromagnetic waves is stopped, for example, for 45 μs. Further, detection is performed a plurality of times (for example, 250 times) in order to determine with high accuracy. According to such setting conditions,
(5 μs + 45 μs) × 8 (type of electromagnetic wave) × 250 (number of detections) = 10 ⁻¹ ms
The determination of one playing card can be performed in about a time. Therefore, even if all of the 54 cards are determined, it takes only about 54 × 10 ⁻¹ ms = 5.4 ms. In such an electromagnetic wave transmission timing chart, by detecting the echo waves (F1, F2, F3) from the resonance tags (1, 2, 3) of the playing card 11a, it is short that the playing card 11a is the heart A. By detecting the echo waves (F1, F3, F7) from the resonance tags (1, 3, 7) of the playing card 11b on the other hand, the playing card 11b may be the heart 10. It will be accurately determined in a short time.
[0015]
As described above, according to the present embodiment, eight types of electromagnetic waves (W1, W2, W3, W4, W5, W6, W7, W8) are transmitted at a predetermined timing (FIG. 1C), and transmission is stopped. Analyze and collate the frequencies (f1, f2, f3, f1, f3, f7) of the echo waves (F1, F2, F3, F1, F3, F7) received during that time, and quickly and accurately identify the specific target The object (11a, 11b) can be determined.
Further, according to the present embodiment, by combining two or more resonance tags, all the objects can be determined with the minimum number of resonance tags even when the number and types of the objects increase. In this case, since the type of frequency of the electromagnetic wave to be used can be minimized, the frequencies of the echo waves between the resonance tags are separated from each other. As a result, for example, since the frequencies of adjacent bands are not close to each other, it is possible to solve the conventional problem that the echo waves are similar and different types of objects are erroneously determined to be the same. Become.
[0016]
In the embodiment described above, a playing card composed of 54 sheets is assumed as an object, but this is an example and does not limit the present invention. As the target object, for example, all of the objects that are distinguished in a certain process or environment, such as flower tags, various components flowing through the production line, books, fresh food, and the like, can be set as the target objects.
[0017]
【The invention's effect】
According to the present invention, it is possible to realize an object discriminating apparatus capable of accurately discriminating a specific object irrespective of the number or type of the objects.
[Brief description of the drawings]
FIG. 1A is a diagram showing an entire configuration of an object discriminating apparatus according to an embodiment of the present invention, FIG. 1B is a configuration diagram of a resonance circuit built in a resonance tag, and FIG. FIG. 4 is a chart showing a relationship between a transmission timing of an electromagnetic wave and a transmission timing of an echo wave.
[Explanation of symbols]
1,2,3… Resonance tag 9 detection system
11a, 11b Object
F1, F2, F3… echo wave

Claims (3)

An object discriminating apparatus for discriminating a specific object from a plurality of objects,
Multiple types of resonant tags that emit echo waves of different frequencies,
Transmitting an electromagnetic wave of a predetermined frequency to an individual object on which the plurality of types of resonance tags are provided, and detecting echo waves transmitted from the plurality of types of resonance tags when transmitting the electromagnetic waves; And a detection system for determining a specific target. In the detection system,
A transmission circuit that transmits an electromagnetic wave for transmitting an echo wave from the plurality of types of resonance tags toward the plurality of objects,
A frequency registration unit that sets and registers the frequency of the electromagnetic wave,
A transmission circuit control unit that causes the transmission circuit to transmit an electromagnetic wave corresponding to each frequency registered in the frequency registration unit,
An object-corresponding frequency registration unit that selects two or more frequencies in combination from among the frequencies registered in the frequency registration unit and registers the selected two or more frequencies individually in association with each of the plurality of objects; When,
When an electromagnetic wave is transmitted from the transmission circuit, a reception circuit that receives echo waves transmitted from the plurality of types of resonance tags,
The frequency of the echo wave received by the receiving circuit is analyzed based on the frequency registered in the frequency registration unit, and the analyzed frequency and the plurality of objects registered in the object corresponding frequency registration unit. The object discriminating apparatus according to claim 1, further comprising: an analysis matching unit configured to perform matching. 3. The object discriminating apparatus according to claim 2, wherein an electromagnetic wave corresponding to each frequency registered in the frequency registration unit is sequentially transmitted at a predetermined timing from the transmission circuit of the detection system.

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