JPH01161182A - Recognizing device - Google Patents

Abstract

PURPOSE:To attain highly accurate remote recognition by being equipped with an oscillating circuit to radiate the magnetic wave at specific frequencies, a receiving circuit to detect a delay reflection electromagnetic wave at the same frequencies as a radiation electromagnetic wave, a direction coupler, a confirmation detecting circuit, etc. CONSTITUTION:The recognizing device is equipped with an oscillating circuit 1 to continuously radiate the electromagnetic wave at the specific frequencies for a set time, a receiving circuit 2 to detect the presence and absence of the delay reflection electromagnetic wave at the same frequencies as the radiated electromagnetic wave, and a direction coupler 3 to regulate the radiation and receipt of the electromagnetic wave in a constant direction. Further, a control circuit 4 and a confirmation detecting circuit 5 to control the circuits and to confirm the presence of a recognized substance are provided, and a high frequency echo device 6 to be fitted to the recognized substance is possessed. By receiving the electromagnetic wave, the device 6 excites a high Q value resonance circuit, and reflects the electromagnetic wave at the same frequencies. A recognizing device main body A checks whether or not the electromagnetic wave exists. When the same frequencies are detected by a series of actions, the circuit 5 outputs a recognition result.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a recognition device. More specifically, the present invention relates to a remote recognition device having a high frequency echo oscillation device and a corresponding detection circuit system.

(Background Art) In recent years, automation of production lines has progressed rapidly in the industrial world, and it has become possible to provide flexibility so that a wide variety of products in small quantities can flow on the same line.

In such manufacturing line innovations, it is important to manage the types of products and parts, and recognition using barcode systems and OCR systems has already been implemented as elemental technology for this purpose.

However, in the current situation, in both the barcode method and the OCR method, it is necessary to bring the reading device close to the reading part of the object to be recognized. Attachment of the reading pattern to the object to be recognized is subject to major restrictions in terms of location.

In addition, the use of ID cards is widely used in checking the entry and exit of people into highly controlled areas and in labor management. However, even in this case,
It was extremely troublesome to present the card each time and to insert it into a reading device to have it recognized and recorded.

The reality is that there are still problems to be solved in conventional recognition and discrimination of objects and people.

The ideal recognition device would ideally be able to remotely recognize information specific to a person naturally, without the user being aware of it, just as humans recognize other people. With this in mind, attempts have been made to recognize people based on their voice and facial appearance, but these techniques require large-scale equipment and have low recognition accuracy.

In a situation where automation and automatic recognition are progressing both socially and industrially, there is a strong desire to realize a simpler, more efficient, and more accurate recognition device.

(Object of the Invention) This invention was made in view of the circumstances as described in 1 below, and provides a new recognition device that improves the shortcomings of conventional recognition devices and enables simple and accurate remote recognition. is intended to provide.

(Disclosure of the Invention) In order to realize the object of L, the recognition device of the present invention has the following features:
An oscillation circuit that continuously emits electromagnetic waves of a specific frequency for a certain period of time, a receiving circuit that detects delayed reflected electromagnetic waves that have the same frequency as the emitted electromagnetic waves, and a directional coupler that regulates the emission and reception of electromagnetic waves in a certain direction. It has a high-frequency echo oscillation device that includes a control circuit that controls the circuit, a confirmation detection circuit that confirms the presence of the object to be recognized, and has a high Q value resonant circuit that is attached to the object to be recognized. It is characterized by detecting delayed electromagnetic waves of the same frequency reflected by the object and confirming the presence of the object to be recognized.

The device of this invention utilizes electromagnetic waves. The biggest advantage of using electromagnetic waves is that electromagnetic waves have the property of passing through substances, so the device to be recognized can be attached to any part of the body to be recognized, or anywhere on the person.
For example, it can be attached to clothes, bags, etc., and it is possible to automatically recognize and judge whether a person passes near the recognition device without the person being recognized being aware of its presence.

The device of the present invention, which has produced such advantages, also utilizes the property that a resonant circuit with a high Q value absorbs and reflects electromagnetic waves of a specific frequency. That is, in an electric circuit, a resonant circuit with a high Q value utilizes the ability to store energy up to a certain limit at a resonant frequency.

The recognition device of the present invention will be explained with reference to the attached drawings.6 Fig. 1 is a block diagram illustrating the device of the present invention. As shown in Figure 1, the recognition device consists of an oscillation circuit (1) that continuously emits electromagnetic waves of a specific frequency for a certain period of time.
, a reception path (2) that detects the presence or absence of delayed reflected electromagnetic waves having the same frequency as the emitted electromagnetic waves, and a directional coupler (3) that regulates the emission and reception of electromagnetic waves in a fixed direction, and a directional coupler (3) that controls these circuits. , a control circuit (4) that confirms the presence of the object to be recognized.
It has a confirmation detection circuit (5) and a high frequency echo device (6) consisting of a high Q value resonant circuit for the object to be recognized (=1).

The operation of this device will be explained as follows.

That is, electromagnetic waves of a certain frequency are continuously emitted from the main body (A) of the recognition device for a certain period of time. The frequency used depends on the structure of the high-frequency echo device; however, in order to make the high-frequency echo device compact and ensure processing accuracy,
Gtlz or higher is preferable. In other words, a resonant circuit that resonates at a frequency higher than IGflz can achieve a high Q value of several 1,000 using a normal distributed constant circuit type LC resonant circuit. Can be shortened. Furthermore, as the frequency used increases,
It also becomes easy to provide the main body device (A) with directivity.

The time for emitting electromagnetic waves is preferably the time until the voltage amplitude of the high Q value resonant circuit approaches a saturation value.

The high frequency echo generator (6) attached to the object to be recognized is
Receiving the radiated electromagnetic waves, excites a high Q value resonant circuit,
Reflects electromagnetic waves of the same frequency. Recognition device body (A)
stops the emission of electromagnetic waves and checks whether there are electromagnetic waves with the same frequency as the emitted electromagnetic waves. The receiving circuit used here must be a narrowband receiving circuit based on its operating principle.

When the same frequency is detected through the above series of operations, the confirmation detection circuit outputs the recognition result.

Of course, in the device of the present invention, by providing respective resonance circuits for a plurality of specific frequencies,
Needless to say, the number of separated individuals can be increased. It is also possible to multiplex the recognition information by installing resonant circuits in a plurality of objects to be recognized, or by incorporating a plurality of resonant circuits into one high-frequency echo device.

Furthermore, another feature of the present invention is that since a resonant circuit is used as the device to be recognized (high frequency echo generator), it can be made small, light and heavy, robust, and requires no power source.

FIG. 2 shows a second embodiment of this high frequency echo generator. This example has a 'WJ construction with an antenna (7) loop-coupled to a semi-coaxial resonator. Similar to the manufacture of high frequency coaxial connectors, an antenna (7) is built in together with a capacitor (8) and a coil (9), and these are covered by an external cylinder (10).

Of course, the present invention is not limited to the above examples, and it goes without saying that various embodiments are possible.

(Effect of the invention) As explained in detail above, this invention provides a simple and convenient
A recognition device that is highly accurate and capable of remote recognition is realized.

In this device, even if the object to be recognized is a human being, the person to be recognized is not aware of it.

[Brief explanation of the drawing]

FIG. 1 is a diagram 11772 illustrating the apparatus of the present invention. FIG. 2 is a sectional view showing an embodiment of the high frequency echo generator. 1... Oscillation circuit 2... Receiving circuit 3... Directional coupler 4... Control circuit 5... Confirmation detection circuit 6... High frequency echo device 7... Antenna 8... Capacitor 9...Coil 10...External cylinder

Claims (3)

[Claims] (1) An oscillation circuit that continuously emits electromagnetic waves of a specific frequency for a certain period of time, a receiving circuit that detects delayed reflected electromagnetic waves of the same frequency as the emitted electromagnetic waves, and a directional coupler that regulates the emission and reception of electromagnetic waves in a certain direction. , a control circuit for controlling these circuits, and a confirmation detection circuit for confirming the presence of an object to be recognized, and a high-frequency echo oscillator having a high Q value resonant circuit attached to the object to be recognized. A recognition device characterized by detecting delayed electromagnetic waves of the same frequency reflected by resonance of the device to confirm the presence of an object to be recognized. (2) The recognition device according to claim (1), which individually recognizes objects to be recognized using a plurality of specific frequencies. (3) The recognition device according to claim (1), which corresponds to a high frequency echo oscillation device having a structure having an antenna loop-coupled to a semi-coaxial resonator.