KR100368497B1 - Method for detecting metal - Google Patents

Abstract

The present invention transmits a sine wave to the searchee and analyzes the reflected signal to recognize the shape of the metal, and displays the shape of the metal, numbers, letters, etc. through the display unit, and alarms to earphones or speakers according to the user's selection The present invention relates to a metal detection method that sends out a warning or vibrates, and according to the present invention, after power is supplied, a sine wave is transmitted to a searchee, and after receiving a reflected wave reflected by the metal carried by the searcher, The received reflected wave is analyzed to detect a metal form. The detected metal form is searched to determine whether the metal is a search target, and as a result, a metal form and a letter are displayed when the metal corresponds to the search target. In addition, if it is determined that the metal to be searched, the alarm mode is searched, and an alarm is selectively sent or a vibration function is performed according to the searched alarm mode. In this way, the type and type of metal possessed by the searchee can be known in advance, so that it is possible to cope with the criminal arrest and promote safety.

Description

Metal detection method {METHOD FOR DETECTING METAL}

The present invention relates to a metal detection method, and more particularly, a sine wave is transmitted to a searchee and the reflected signal is compared with previously stored data to recognize the shape of the metal, and the shape of the metal is displayed through the display. The present invention relates to a metal detection method using a portable metal detector that displays characters, characters, and the like, and sends an alarm to an earphone or a speaker or vibrates according to a user's selection.

In general, metal detection is mainly used to detect metals carried in specific security areas such as airports and harbors without directly searching the human body of the examinee.

That is, in the conventional metal detection method, ultrasonic waves are emitted by the device, and the presence or absence of the metal is determined by checking the change of the sound wave reflected by the object (metal).

To explain this in more detail, sound waves in the inaudible frequency band are emitted through the detection rod or antenna of a known device during search, and when the ultrasonic wave hits the metal body when the detection rod or antenna is wound around the searchee, the metal body resonates. As the reflected sound waves change. Therefore, the metal is detected by the change of the received sound wave.

However, the conventional portable metal detector has a disadvantage in that it is inconvenient to carry because it is in the form of a rod, and it is inconvenient to use because the metal can be detected only when the body is close to the subject.

In addition, the ultrasonic method has a disadvantage in that precision detection is impossible due to the large tolerance of metal detection, and also, the ultrasonic method has a disadvantage in that the production cost is increased by using expensive equipment such as ultrasonic oscillation means.

Therefore, the present invention has been proposed to solve all the problems caused by the detection by the conventional metal detector as described above,

An object of the present invention is to send a sine wave to a searchee and compare the reflected signal with pre-stored data to recognize the shape of the metal, display the shape of the metal, display numbers, letters and the like through the display unit and select the user. Therefore, the present invention provides a metal detection method that sends an alarm to an earphone or a speaker or informs it by vibration.

A sine wave generator for generating a sine wave in accordance with control data for searching in order to use a conventionally known portable metal detector for achieving the above object;

A transmission level controller for adjusting a transmission level of a sine wave generated by the sine wave generator;

A transmission amplifier for amplifying a sine wave output from the transmission level regulator to a predetermined level;

A transmitting and receiving unit for transmitting the sine wave amplified by the transmitting amplifier through an antenna and receiving the reflected wave;

A reception amplifier for amplifying a reception signal obtained by the transmission and reception unit to a predetermined level;

A detector which detects a form of a metal by analyzing a signal obtained from the reception amplifier;

A comparison unit which compares the signal output from the detection unit with previously stored data, removes metal data of the non-search object, and outputs only data corresponding to the search object;

Recognizes the metal form and number as the data output from the comparison unit, generates a metal form display, number and letter display control signal according to the recognition result, and outputs an alarm or vibration generation signal according to the user's mode selection A processor;

A display unit which displays a metal form detected according to a display control signal output from the microprocessor and displays numbers and letters;

An alarm generating unit generating an alarm according to an alarm generating signal output from the microprocessor and outputting the generated alarm to an earphone or a speaker according to the user's mode selection;

It comprises a vibration unit for vibrating according to the vibration generating signal output from the microprocessor to inform the user of the detection of metal.

The present invention (method) using the above apparatus,

In the metal detection method,

Sending a sine wave to the searchee when power is supplied;

Receiving a reflected wave reflected by the metal carried by the searchee;

Analyzing the received reflected wave to detect a metal form;

Searching for the detected metal form to determine whether it is a metal to be searched, and as a result, displaying a metal form and a character when the metal corresponds to the search object;

And if it is determined as the search target metal, searching for an alarm mode, selectively sending an alarm or performing a vibration function according to the searched alarm mode.

1 is a block diagram showing a portable metal detector for explaining the metal detection method of the present invention.

2 is a flowchart illustrating a metal detection method according to the present invention.

<Explanation of symbols for the main parts of the drawings>

2: sine wave generator 3: transmission level regulator

4 transmitting amplifier 5 transmitting / receiving unit

7: receiving amplifier 8: detection unit

9: comparison unit 10: microprocessor

12: display unit 13: alarm generating unit

16: vibrator

Hereinafter, the metal detector will be described in detail with reference to the accompanying drawings before explaining a preferred embodiment of the present invention according to the technical spirit as described above.

1 is a block diagram showing the configuration of a portable metal detector.

Here, reference numeral 1 denotes a power supply unit for supplying driving power to the portable metal detection apparatus, reference numeral 2 denotes a sine wave generator that generates a sine wave according to control data for retrieval, and reference numeral 3 denotes the sine wave generator. A transmission level regulator for adjusting the transmission level of the sine wave generated in (2) is shown, and reference numeral 4 denotes a transmission amplifier for amplifying the sine wave output from the transmission level regulator 3 to a predetermined level.

Further, reference numeral 5 denotes a transmission and reception section for transmitting a sine wave amplified by the transmission amplifier 4 through an antenna 6, and a reflected wave is received. Reference numeral 7 denotes a reception obtained in the transmission and reception section 5. Representation amplifier for amplifying a signal to a predetermined level, reference numeral 8 denotes a detector for detecting the shape of the metal by analyzing the signal obtained from the receiver amplifier 7, reference numeral 9 is output from the detector 8 A comparison unit which compares a signal with data stored in advance, removes non-search metal data, and outputs only data corresponding to the search object.

Also, reference numeral 10 denotes a metal form and a number as data output from the comparison unit 9, generates a metal form display, a number and a letter display control signal according to the recognition result, and according to a user's mode selection. The microprocessor outputs an alarm or vibration generating signal, reference numeral 11 denotes all selection switches for selecting an alarm mode and a vibration mode, and reference numeral 12 denotes a display control signal output from the microprocessor 10. The display unit displays a detected metal form and displays a number and a letter. Reference numeral 13 denotes an alarm in response to an alarm generation signal output from the microprocessor 10, and according to the user's mode selection. The alarm generating unit outputs the generated alarm to the earphone 14 or the speaker 15, and reference numeral 16 denotes the above. The vibration unit which vibrates according to the vibration generation signal output from the microprocessor 10 to notify the user of metal detection is shown.

The operation of the portable metal detector configured as described above is as follows.

First, although the user (searcher) is not shown in the drawing, when the power switch is turned on, the power supply 1 supplies the DC power discharged from the battery embedded in the necessary portion. That is, driving power is supplied to the transmitting / receiving unit 5, the transmitting amplifier 4, the receiving amplifier 7, the microprocessor 10, the display unit 12, the alarm generating unit 13, and the vibrating unit 16. In addition, it supplies power to the necessary parts.

In this state, the microprocessor 10 transmits a control signal for generating a sine wave required by the present invention to the sine wave generator 2 in order to detect whether the searcher carries metal. The sine wave generator 2 transmits the sine wave generator 2. According to the control signal, the sine wave is generated by using the internal resistance and the time constant of the capacitor.

The sine wave generated in this way is input to the transmission level regulator 3, and the transmission level regulator 3 adjusts the level of the sine wave in order to adjust the transmission distance of the input sine wave and transmits it to the transmission amplifier 4. In this case, the transmission distance adjustment of the sine wave may be changed according to a user's data input, or alternatively, may be fixed to be transmitted only to a proper distance.

Next, the transmission amplifier 4 amplifies the sine wave output from the transmission level regulator 3 to a predetermined level and transmits it to the transmission and reception section 5, and the transmission and reception section 5 transmits the transmission. The sine wave is transmitted through the antenna 6.

Then, the sine wave transmitted through the antenna 6 is reflected by the metal carried by the searchee, and the reflected wave is received through the antenna 6 and transmitted to the transmitting and receiving unit 5. The antenna 6 here uses directivity to improve focusing power during transmission and reception.

Meanwhile, the transmitter and receiver 5 transmits the received reflected wave to the receive amplifier 7, and the receive amplifier 7 amplifies the reflected wave to a predetermined level.

The amplified reflection wave is transmitted to the detection unit 8, and the detection unit 8 detects the shape of the metal by analyzing the transmitted reflection wave.

The detected metal form signal is transmitted to the comparator 9, and the comparator 9 analyzes the transmitted metal form signal to determine whether it is a metal to be searched or a metal to be searched. Then, if the detected metal is a non-search metal (for example, buckle, ring, bracelet, necklace, car, etc.), the detected data is removed. In contrast, the detected metal is a search metal (for example, In the case of weapons such as guns and swords, the detected metal data is transmitted to the microprocessor 10.

Then, the microprocessor 10 recognizes the detected metal, controls the display unit 12 to display the detected form of the metal, and displays the number of the detected metal or a character corresponding to the detected metal.

In addition, the microprocessor 10 determines the selected mode by searching the output signal of the mode selection switch 11. Here, the mode selection switch 11 is a switch for selecting the alarm mode and the vibration mode, and this mode is set by the user.

The alarm generation signal or the vibration generation signal may be selectively output according to the determined mode.

For example, when the user selects the alarm mode, the alarm generation signal is transmitted only to the alarm generation unit 13. Alternatively, when the vibration mode is selected, the vibration generation signal is only transmitted to the vibration unit 16.

When the alarm generation signal is transmitted, the alarm generator 13 transmits the alarm generated according to the user's selection of the earphone 14 or the speaker 15 to the earphone 14 or the speaker 15. In this case, the earphone 14 and the speaker 15 are generally changed to the earphone mode automatically when the earphone is inserted into the insertion hole. However, a separate selection switch is added and the earphone is always inserted into the insertion hole. Alarms can also be selectively delivered to earphones or speakers.

In addition, when the vibration generation signal is transmitted, the vibration unit 16 performs a vibration function to inform the user that the metal corresponding to the search target is detected.

2 is a flowchart illustrating a metal detection method of a portable metal detector according to the present invention.

As shown, supplying power (S1), transmitting a sine wave (S2), receiving a reflected wave (S3), detecting a metal form (S4), and applying a search target metal Determining (S5), displaying a metal form, numbers and letters (S6), determining an alarm mode (S7), and driving the vibrating unit if the determined mode is a vibration mode (S8). ), And if the determined mode is a speaker mode (S9) to send an alarm through the speaker, and if the determined mode is the earphone mode (S10).

In the metal detection method using the portable metal detector according to the present invention, the driving power is first supplied to the necessary portion in step S1. In step S2, a sine wave is sent to the searchee using a resistor and a capacitor. In step S3, a reflected wave reflected by the metal carried by the searchee is received. In step S4, the received reflected wave is analyzed to detect a metal form. In step S5, the detected metal is determined whether the metal corresponds to a search target or a metal corresponding to a non-search target. As a result of the determination, if the detected metal is a metal corresponding to the search object, the metal form is displayed in step S6, and the name or number of the metal is displayed using numbers or letters. Next, in step S7, the alarm mode selected by the user is searched, and when the alarm mode selected by the user is the vibration mode, the vibration unit is driven in step S8 to inform the user that the metal corresponding to the search target is detected by vibration. In addition, when the user selects the speaker mode, the alarm is sent out through the speaker in step S9. In addition, when the user selects the earphone, the alarm is sent out through the earphone in step S10. Indicates that it is detected.

According to the above-described 'metal search method' according to the present invention, it is possible to easily carry and display the shape, number, metal name, etc. of the metal carried by the searcher by miniaturizing it as a pager, so that when the criminal is arrested, Information can be informed about the safety benefits.

In addition, since the detection of the metal corresponding to the search target by the alarm function or vibration function to notify the user of the metal, there is an effect that provides a more convenient to the user.

Claims (2)

delete In the metal detection method, Sending a sine wave to the searchee when power is supplied; Receiving a reflected wave reflected by the metal carried by the searchee; Analyzing the received reflected wave to detect a metal form; Searching for the detected metal form to determine whether it is a metal to be searched, and as a result, displaying a metal form and a character when the metal corresponds to the search object; And detecting an alarm mode and selectively transmitting an alarm or performing a vibration function according to the searched alarm mode when it is determined as the search target metal.