KR920004561Y1 - Insulation voltage detecting apparatus of crt - Google Patents

Insulation voltage detecting apparatus of crt Download PDF

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KR920004561Y1
KR920004561Y1 KR2019890016615U KR890016615U KR920004561Y1 KR 920004561 Y1 KR920004561 Y1 KR 920004561Y1 KR 2019890016615 U KR2019890016615 U KR 2019890016615U KR 890016615 U KR890016615 U KR 890016615U KR 920004561 Y1 KR920004561 Y1 KR 920004561Y1
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electrode
leakage current
current
breakdown voltage
measuring unit
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KR910009521U (en
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손환익
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삼성전관 주식회사
김정배
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/24Testing of discharge tubes
    • G01R31/25Testing of vacuum tubes
    • G01R31/257Testing of beam-tubes, e.g. cathode-ray tubes, image pick-up tubes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

내용 없음.No content.

Description

수상관의 내압특성 측정장치Pressure resistance measuring device of water pipe

제 1 도는 본 고안에 따른 측정장치의 회로도.1 is a circuit diagram of a measuring device according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

CRT : 수상관 LC : 누설전류 측정부CRT: Water pipe LC: Leakage current measuring unit

SC : 서지전류 측정부SC: surge current measuring unit

본 고안은 수상관의 전수검사 단계인 내압불량 검사를 위한 수상관의 내압특성 측정장치에 관한 것으로서 특히, 수상관에 봉입된 전자총의 복수 전극중 고전압이 인가되는 전극에 소정의 측정전압을 인하하여 일정시간 동안 타전극과의 누설전류를 측정하고 과도한 누설전류가 흐를때 내압불량으로 판정토록하는 수상관의 내압특성 측정장치에 관한 것이다.The present invention relates to an apparatus for measuring the breakdown voltage characteristics of a receiving tube for the fault resistance test, which is a total inspection stage of the receiving tube. The present invention relates to an apparatus for measuring the breakdown voltage of a receiving tube for measuring a leakage current with another electrode for a predetermined time and for determining a breakdown voltage failure when an excessive leakage current flows.

수상관 내의 전자총에는 열전자를 방출하는 음극과 방출된 열전자를 제어, 집속, 가속하는 복수개의 전극이 있고 이들은 양측의 비이드글래스에 지지되어 서로의 간격을 유지함과 동시에 전기적으로는 절연상태이다.The electron gun in the receiving tube has a cathode for emitting hot electrons and a plurality of electrodes for controlling, focusing, and accelerating the emitted hot electrons, which are supported by both bead glasses on both sides to maintain a distance from each other and are electrically insulated.

그런데 이와같은 전자총은 고진공상태의 수상관내에 설치되어 있고 또 각 전극간에는 상당한 고전압이 인가되는 것이 있으므로 큰 전위차로 인해 누설전류가 흐르는등 내전압 특성에 문제가 되고 있다.However, since such an electron gun is installed in a high-vacuum receiving tube, and a considerable high voltage is applied between the electrodes, it is a problem in the breakdown voltage characteristics such as leakage current flowing due to a large potential difference.

만일 상기 누설전류가 규정치 이상으로 되면 전력 손실은 물론 제품 특성에 영향을 미치며 특히 제조 또는 사용중에 각 전극간의 절연상태가 나빠지면 과도한 누설전류가 흘러 불꽃방전등 제품 수명을 크게 단축시키는 요인이 된다.If the leakage current is higher than the specified value, it affects not only the power loss but also the product characteristics. Especially, if the insulation state between the electrodes deteriorates during manufacturing or use, excessive leakage current flows, which greatly shortens the product life of the spark discharge lamp.

따라서 수상관의 전수검사 단계에서 내압불량 검사는 엄격히 수행되어야 할 것이다.Therefore, the internal pressure failure test should be strictly performed at the water pipe inspection.

그러나 내압불량은 계측기에 의한 검사가 불가하여 종래에는 전극간의 불꽃방전을 확인하는 정도의 관능검사에 의존하여 왔던 것이므로 검사의 신뢰도가 낮아 품질향상 및 안전성에 기여하는 바가 적었던 것이다.However, withstand pressure defects cannot be inspected by a measuring instrument, and in the past, they have been relied on sensory tests to confirm the spark discharge between electrodes. Therefore, the reliability of the inspection is low, which contributes to the improvement of quality and safety.

본 고안의 목적은 수상관의 내압불량을 검사함에 있어서 종래의 원시적인 관능검사 방법을 탈피하여 보다 정확하고 신뢰도를 향상시킬 수 있으며 아울러 수상관의 품질향상 및 안전성에 기여할 수 있는 수상관의 내압 특성 측정장치를 제공하려는 것이다.The purpose of the present invention is to overcome the conventional primitive sensory test method in checking the pressure resistance of the water pipe, which can improve the accuracy and reliability, and also can improve the quality and safety of the water pipe. To provide a measuring device.

이와같은 목적을 달성하는 본 고안은 수상관에 봉입된 전자총의 복수전극 중 고전위의 애노우드에 정격전압 보다 높은 측정전압을 인가하여, 이것과 타전극간의 내압불량을 측정하는 내압특성 측정장치에 있어서, 상기 애노우드를 제외한 나머지전극 -제어전극, 스크린전극 및 포커스전극-과 접지사이에 전류메터와 보호용 다이오드 및 콘덴서로 된 누설전류 측정부와, 이의 접지선상에서 과도한 누설전류를 감지하는 영상변류기, 실리콘제어 정류기, 전원 및 경보기로되는 서지전류 측정부를 구성하여 되는 점에 특징이 있다.The present invention to achieve the above object is to apply a voltage higher than the rated voltage to the anode of the high potential of the plurality of electrodes of the electron gun enclosed in the water pipe, to the breakdown voltage characteristic measuring device for measuring the breakdown voltage between this and the other electrode A leakage current measuring unit comprising a current meter, a protection diode, and a capacitor between the remaining electrodes except the anode, the control electrode, the screen electrode, and the focus electrode, and a ground, and an image current transformer for detecting an excessive leakage current on the ground line thereof. It is characterized in that it consists of a surge current measuring unit consisting of a silicon controlled rectifier, a power supply and an alarm.

이하 본 고안 실시예를 첨부된 도면에 의거하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

본 고안 장치는 제 1 도와 같이, 수상관(CRT)내 전자총의 복수전극(G1~G5)중 고전압이 인가되는 애노우드(G3)(G5)에 소정의 측정전원(E1)을 인가하고, 상기 애노우드(G3)(G5)를 제외한 나머지 전극 즉 제어전극(G1)과 스크린 전극(G2)과 포커스전극(G4)을 공통접속하여 누설전류 측정부(LC)를 통해 접지선(EL)으로 접지시키고, 이 접지선(EL)상에 흐르는 과도한 누설전류를 감지하는 서지전류 측정부(SC)로 구성된다.The invented apparatus, as a first tile, kinescope (CRT) anode which is of the high voltage is applied within the plurality of electrodes of the electron gun (G 1 ~ G 5) Wood (G 3) (E 1) a predetermined measuring power (G 5) The leakage current measuring unit LC is connected to the other electrodes except the anode G 3 and G 5 , that is, the control electrode G 1 , the screen electrode G 2 , and the focus electrode G 4 are commonly connected. It is composed of a surge current measuring unit (SC) for grounding the ground wire (EL) through), and detects the excessive leakage current flowing on the ground wire (EL).

상기 누설전류 측정부(LC)는 소정의 측정범위를 가지는 전류메터(M)와 이에 병렬접속되는 보호용 다이오드(D) 및 콘덴서(C)로 구성된다.The leakage current measuring unit LC includes a current meter M having a predetermined measurement range, and a protective diode D and a capacitor C connected in parallel thereto.

또한 상기 서지전류 측정부(SC)는 상기 누설전류 측정부(LC)의 접지선(EL)에 규정치이상의 누설전류가 흐를때 소정의 전류를 흘리는 영상변류기(PT)와 이 전류로 트리거되는 실리콘제어정류기(SCR)와 실리콘 제어정류기(SCR)의 양단에 직렬 접속된 전원(E2) 및 경보기(B)로 구성되어 있다.In addition, the surge current measuring unit SC includes an image rectifier PT for flowing a predetermined current when a leakage current exceeding a predetermined value flows into the ground line EL of the leakage current measuring unit LC, and a silicon controlled rectifier triggered by the current. And a power supply E 2 and an alarm B connected in series with both ends of the SCR and the silicon controlled rectifier SCR.

이와같은 본 고안 실시예의 회로 동작을 설명하면 먼저 수상관(CRT)내 전자총의 전극 중 소정의 측정전원(E1)이 인가되는 애노우드(G3)(G5)와 접지측에 연결된 나머지 전극(G1)(G2)(G4) 사이에는 상기 측정전원(E2)의 전압만큼의 전위차가 형성되어 각 전극사이에 글로우 방전이 일어나고 따라서 미소하나마 누설전류가 흐르게 된다. 여기서 측정전원(E1)의 전압은 상기 애노우드(G3)(G5)에 인가될 정격전압보다 대략 1.5배 높은 전압으로 하는 것이 바람직하다.Referring to the circuit operation according to the embodiment of the present invention, first, among the electrodes of the electron gun in the water tube CRT, an anode G 3 , G 5 to which a predetermined measurement power supply E 1 is applied, and the remaining electrodes connected to the ground side A potential difference equal to the voltage of the measurement power supply E 2 is formed between (G 1 ) (G 2 ) (G 4 ) so that a glow discharge occurs between the electrodes and thus a small leakage current flows. In this case, the voltage of the measurement power supply E 1 is preferably about 1.5 times higher than the rated voltage to be applied to the anode G 3 and G 5 .

그러면, 각 전극간에 흐르는 누설전류는 접지선(EL)을 통해 접지측으로 흐르고 이때의 전류값이 누설전류 측정부(LC)의 전류메터(M)에 체크된다. 따라서 누설전류값을 읽음으로써 규정치 이하의 누설전류가 흐르면 각 전극간의 내전압 특성이 양호함을 알 수가 있는 것이다.Then, the leakage current flowing between the electrodes flows to the ground side through the ground line EL, and the current value at this time is checked by the current meter M of the leakage current measuring unit LC. Therefore, by reading the leakage current value, it can be seen that when the leakage current below the specified value flows, the withstand voltage characteristics between the electrodes are good.

그러나 각 전극간의 절연상태가 불량해지면 어느 순간에서 허용치 이상의 누설전류가 흐르게 되므로 내전압 특성이 좋지 못함을 알 수가 있다.However, when the insulation state between each electrode becomes poor, leakage current more than the allowable flow flows at any moment, and thus it is understood that the withstand voltage characteristics are not good.

특히 각 전극간의 절연상태가 극히 불량하면 어느 순간에 절연이 파괴됨과 동시에 과도한 누설전류가 흐르게 되는데 이 과도한 누설전류로부터 상기 전류메터(M)가 손상될 위험이 있으나 이때에는 전류메터(M)와 병렬접속된 다이오드(D)와 콘덴서(C)에 의하여 접지선(EL)측으로 바이패스 되므로 전류메터(M)가 손상되는 것이 방지된다.In particular, if the insulation state between each electrode is extremely poor, the insulation breaks down and excessive leakage current flows at any moment. However, there is a risk of damaging the current meter (M) from this excessive leakage current. Since the connected diode D and the capacitor C are bypassed to the ground line EL side, the current meter M is prevented from being damaged.

이와 동시에 접지선(EL)상에 설치된 영상변류기(PT)에 전류가 흐르게 되어 서지전류 측정부(SC)의 실리콘 제어 정류기(SCR)가 트리거 되고 따라서 그 경보기(B)에서 경보음이 발생된다.At the same time, a current flows through the image current transformer PT installed on the ground line EL, so that the silicon controlled rectifier SCR of the surge current measuring unit SC is triggered, thereby generating an alarm sound.

경보음이 발생되면 상기에서와 같이 전극간의 절연상태가 그 측정전원(E1)의 전압에 견디지 못하고 파괴되었음을 알 수 있는 것이다.When the alarm sounds, it can be seen that the insulation state between the electrodes as described above was destroyed without being able to withstand the voltage of the measurement power supply E 1 .

이와 같이 본 고안은 간단한 회로구성에 의하여 수상관의 내전압특성 및 그 절연파괴에 따른 불량관정을 정확히 계측하는 것이므로 측정 결과에 대한 신뢰성을 보장받을 수 있고 아울러 제품의 품질향상 및 안전사고 예방에 기여하는 효과적인 고안이다.As such, the present invention accurately measures the breakdown voltage characteristics of the receiving tube and its faulty breakdown by simple circuit configuration, thereby ensuring the reliability of the measurement results and contributing to the improvement of product quality and the prevention of safety accidents. It is an effective design.

Claims (1)

수상관(CRT)에 봉입된 전자총의 복수전극 중고전위의 애노우드(G3)(G5)에 정격전압보다 높은 전압을 인가하여 이것과 타전극간의 내압불량을 측정하는 내압 특성 측정장치에 있어서, 상기 애노우드(G3)(G5)를 제외한 나머지 전극-제어전극(G1), 스크린전극(G2), 포커스전극(G4)-과접지사이에 전류메터(M)와 보호용 다이오드(D) 및 콘덴서(C)로 된 누설전류 측정부(LC)와, 이의 접지선(EL)에 과도한 누설전류를 감지하는 영상변류기(PT), 실리콘 제어정류기(SCR), 전원(E2) 및 경보기(B)로 된 서지전류 측정부(SC)로 구성된 것을 특징으로 하는 수상관의 내압특성 측정장치.In the breakdown voltage characteristic measuring device which applies a voltage higher than the rated voltage to the anode (G 3 ) (G 5 ) of the multi-electrode medium potential of the electron gun enclosed in the water pipe (CRT) and measures the breakdown voltage failure between the electrode and the other electrode. , The current meter (M) and the protective diode between the remaining electrodes-control electrode (G 1 ), screen electrode (G 2 ), focus electrode (G 4 )-ground except for the anode (G 3 ) (G 5 ) (D) and a capacitor (C), the leakage current measuring unit (LC), its current line (PT), silicon controlled rectifier (SCR), power supply (E 2 ) for detecting excessive leakage current in the ground line (EL) and An apparatus for measuring the breakdown voltage of a water pipe, characterized by comprising a surge current measuring unit (SC) made of an alarm (B).
KR2019890016615U 1989-11-10 1989-11-10 Insulation voltage detecting apparatus of crt KR920004561Y1 (en)

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KR920004561Y1 true KR920004561Y1 (en) 1992-07-03

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