KR960014932A

KR960014932A - Metal foreign object detection device

Info

Publication number: KR960014932A
Application number: KR1019940025523A
Authority: KR
Inventors: 이승세
Original assignee: 이승세; 주식회사 대림 수출입 콘소시엄
Priority date: 1994-10-06
Filing date: 1994-10-06
Publication date: 1996-05-22

Abstract

금속 이물질 검출 장치에 있어서, 금속 이물질이 검출될 경우 검출 장치의 벨트가 정방향에서 역방향으로 다시 구동되도록 함으로써 편리하게 피검출 대상을 꺼낼 수 있도록 한 장치가 기재되어 있다. 본 발명에 따른 금속 이물질 검출 장치는 일정한 자장 공간으로 금속 이물질을 포함하는 피검출 대상이 통과할 때 발생하는 자장의 변화를 전기적 신호로 변환하기 위한센서(11), 상기 센서(11)로부터의 신호를 증폭하여 펄스로 정형하기 위한 파형 정형부(12) 및 상기 파형 정형부(12)로부터의 펄스에 응답하여 모터를 정지시킨 후 상기 모터의 구동 방향을 전환하여 소정 시간 동안 역방향으로 구동시킨 후 다시 정지시키기 위한 모터 제어부(14)를 포함한다. 본 발명에 의하면, 피검출 대상으로부터 금속 이물질이 검출될 경우 모터가 역방향으로 구동됨으로써 피검출 대상을 원위치로 되돌려 주므로, 상기 자장 공간이 형성된 위치에서 피검출 대상을 꺼내야 하는 불편을 제거하여 작업 안전도를 높이고 작업의 편리함과 효율을 증대시킬 수 있다.An apparatus for detecting a metal foreign substance has been described in which a belt of the detection apparatus is driven again from the forward direction to the reverse direction when a metal foreign substance is detected, so that the object to be detected can be conveniently taken out. Metal foreign matter detection device according to the present invention is a sensor 11, the signal from the sensor 11 for converting the change of the magnetic field generated when the object to be detected containing a metal foreign matter in a certain magnetic space passes into an electrical signal Stops the motor in response to the pulse shaping unit 12 and the waveform shaping unit 12 for amplifying and shaping the pulse, and then reverses the driving direction of the motor and drives the motor in the reverse direction for a predetermined time. And a motor controller 14 for stopping. According to the present invention, when a metal foreign object is detected from the object to be detected, the motor is driven in the reverse direction, thereby returning the object to be detected, thereby eliminating the inconvenience of removing the object to be detected at the position where the magnetic field is formed. It can increase the work convenience and efficiency.

Description

Metal foreign object detection device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 금속 이물질 검출 장치의 구성을 도시한 블럭도,1 is a block diagram showing the configuration of the metal foreign matter detection device of the present invention,

제2도는 센서로부터의 신호를 증폭하여 펄스화하기 위한 제1도에서의 파형 정형부에 대한 한 실시예를 도시한 블럭도,FIG. 2 is a block diagram showing one embodiment of the waveform shaping portion in FIG. 1 for amplifying and pulsing a signal from a sensor;

제3도는 제2도에서의 펄스 형성수단에 대한 상세 회로도,3 is a detailed circuit diagram of the pulse forming means in FIG.

제4도는 파형 정형 수단으로부터의 펄스에 응답하여 모터를 제어하기 위한 모터 제어부의 한 실시예를 도시한 블럭도,4 is a block diagram showing one embodiment of a motor controller for controlling the motor in response to a pulse from the waveform shaping means;

제5도는 제4도의 모터 제어부에 대한 상세 회로도.5 is a detailed circuit diagram of the motor control unit of FIG.

Claims

A sensor 11 for converting a change in the magnetic field generated when a target to be detected containing metal foreign matter into a certain magnetic space passes into an electrical signal, and a waveform for amplifying the signal from the sensor 11 and shaping it into pulses. The motor control unit 14 for stopping the motor in response to the pulse from the shaping unit 12 and the waveform shaping unit 12, and then switching the driving direction of the motor to drive in the reverse direction for a predetermined time and then stopping the motor again. Metal foreign matter detection device comprising a.

The waveform shaping unit (12) according to claim 1, wherein the waveform shaping unit (12) comprises: amplifying means (21) for amplifying a signal from the sensor (11), a low pass filter (22) for removing noise from the amplified signal, A level shifting circuit 23 for applying a predetermined level of DC offset to a low pass signal to set the minimum value of the signal to zero, and for shaping the signal into pulses having a frequency equal to that of the signal. And a pulse forming means (24).

The motor control unit 14 according to claim 1 or 2, wherein the motor control unit 14 outputs a first control signal using the first control signal from the reset switch RST SW as a first input, and the waveform shaping unit 12 The first touch switch 41 outputs the second control signal using the first control signal from the second input, the motor 49 driven by the power input, and the first touch switch 41 from the first touch switch 41. A motor on / off means 47 for connecting and disconnecting a power source for driving the motor 49 in response to the first and second control signals, the first in accordance with a first control signal from the first touch switch 41; First connection control means (43) for maintaining a state and maintaining a second state in accordance with a second control signal from said first touch switch (41), and outputting a first control signal in said second state; The first and second control scenes, respectively, using the first control signal from the first connection control means 43 as its first and second inputs. The second touch switch 42 for outputting the positive direction of the connection path between the motor on / off means 47 and the motor 49 in accordance with the first and second control signals from the second touch switch 42 And a forward / reverse control means 48 for switching in the reverse direction, maintaining a first state according to the first control signal from the second touch switch 42, and maintaining a second state according to the second control signal. Second connection control means 44 for outputting the first and second control signals in two states, and outputting the first control signal after a set time in response to a second control signal from the second connection control means 44; And a second state in response to the first control signal from the timer means 46 and the first control signal from the timer means 46, and maintaining the first state in accordance with the first control signal from the second connection control means 44. A first control scene from the first connection control means 43 in the first state. A call to a second input of the second touch switch 42 and in a second state a first control signal from the first connection control means 43 to a first input of the second touch switch 42. And a third connection control means 45 for supplying, wherein the first touch switch 41 has its first and second inputs respectively being the second connection control means 44 and the third connection control means ( A foreign material detection device, characterized in that the first control signals are supplied from the device.

※ Note: The disclosure is based on the initial application.