KR920002624Y1 - Vibration detector - Google Patents
Vibration detector Download PDFInfo
- Publication number
- KR920002624Y1 KR920002624Y1 KR2019890007033U KR890007033U KR920002624Y1 KR 920002624 Y1 KR920002624 Y1 KR 920002624Y1 KR 2019890007033 U KR2019890007033 U KR 2019890007033U KR 890007033 U KR890007033 U KR 890007033U KR 920002624 Y1 KR920002624 Y1 KR 920002624Y1
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- South Korea
- Prior art keywords
- bush
- vibration detector
- engine
- support surface
- engine mounting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/09—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by piezoelectric pick-up
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
- G01L23/222—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines using piezoelectric devices
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
내용 없음.No content.
Description
제 1 도는 본 고안의 1실시예의 종단면도.1 is a longitudinal sectional view of an embodiment of the present invention.
제 2 도는 종래의 진동 검출기의 종단면도.2 is a longitudinal sectional view of a conventional vibration detector.
제 3 도 및 제 4 도는 각각 제 2 도의 작용을 설명하기 위한 등가회로도.3 and 4 are equivalent circuit diagrams for explaining the operation of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
(1) : 온 부시 (1a) : 는 지지면(1): on bush (1a): the support surface
(1d) : 는 볼트삽입구멍 (2) : 는 기계-전기 변환부(1d) is a bolt insertion hole (2) is a mechanical-electric converter
(6) : 은 압전소자 (9) : 는 웨이트(6): silver piezoelectric element (9): silver weight
(14) : 는 엔진부착대(피검출 상대면) (15) : 는 도통유지물질(14): is engine mount (detected surface) (15): is conductive material
본 고안은 진동 검출기에 관한 것으로, 예를 들면 내연기관의 진동을 검출해서 노킹의 검지등에 사용되는 것이다.The present invention relates to a vibration detector, for example, to detect vibration of an internal combustion engine and to be used for detecting knocking.
제 2 도는 종래의 진동 검출기를 도시한 것으로서, 철게의 금속재로 되는 부시(1)에는 내연기관에 접합하는 지지면(1a), 기계-전기 변환부(2)를 조립하기 위한 받침대면(1b)와 원통부(1c), 볼트삽입구멍(1d)가 형성되어 있다.FIG. 2 shows a conventional vibration detector, in which a bush 1 made of metal of a steel crab has a support surface 1a joined to an internal combustion engine, and a pedestal surface 1b for assembling a mechanical-electric converter 2. And a cylindrical portion 1c and a bolt insertion hole 1d are formed.
부시(1)의 바깥둘레부에는 케이스(3)이 접착결합되어 있고, 기계-전기 변환부(2)는 2내부에 수납되어있다.The case 3 is adhesively bonded to the outer circumferential portion of the bush 1, and the mechanical-electric converter 2 is housed inside the two.
케이스(3)에 일체로 형성된 커넥터(3a)에는 검출신호의 출력단자(4)가 마련되어 있다.The connector 3a formed integrally with the case 3 is provided with an output terminal 4 of the detection signal.
기계-전기 변환부(2)는 받침대면(1b)상에 배치된 플레이트(5), 압전소자(6), 터미널(7), 절연시트(8), 웨이트(9)등으로 되는 둥근 고리모양의 것으로서 부시(1)에 나사식으로 맞추는 너트(10)으로 조여서 고정되어 있다.The mechanical-electric converter 2 has a round ring shape which consists of a plate 5, a piezoelectric element 6, a terminal 7, an insulating sheet 8, a weight 9, and the like arranged on a pedestal surface 1b. It is secured by being tightened with a nut 10 which is screwed to the bush 1.
기계-전기 변환부(2)의 수납부에는 에폭시계의 충전재(11)이 충전되어 있다.An epoxy filler 11 is filled in the housing of the mechanical-electric converter 2.
부시(1)의 원통부(1c)에는 절연 튜브(12)가 마련되어 있다.The insulating tube 12 is provided in the cylindrical part 1c of the bush 1.
이상의 구성으로 되는 진동 검출기는 볼트삽입구멍(1d)에 고정볼트(13)을 통하여 엔진부착대(14)의 나사구멍에 조여 넣어서 엔진에 부착된다.The vibration detector having the above configuration is attached to the engine by being screwed into the screw hole of the engine mounting base 14 through the fixing bolt 13 to the bolt insertion hole 1d.
엔진의 진동에 따른 검출신호는 압전소자(6)의 기준 전극과 동일 전위의 부시(1)을 기준으로 하여, 출력단자(4)에서 검출기 외부로 도출된다.The detection signal according to the vibration of the engine is derived from the output terminal 4 to the outside of the detector based on the bush 1 having the same potential as the reference electrode of the piezoelectric element 6.
따라서, 부시(1)을 엔진부착대(14)와 확실하게 접속해서 항상 기준 전위로 고정하고, 이 상태를 유지하는 것이 검출신호를 도출하는 기본이며, 상기 검출기를 사용하는 경우의 전제조건으로 된다.Therefore, the bush 1 is reliably connected to the engine mounting table 14 and always fixed at a reference potential, and maintaining this state is a basic condition for deriving the detection signal, which is a prerequisite for using the detector. .
따라서, 부시(1)을 엔진부착대(14)와 확실하게 접속해서 항상 기준 전위로 고정하고, 이 상태를 유지하는 것이 검출신호를 도출하는 기본이며, 상기 검출기를 사용하는 경우의 전제조건으로 된다.Therefore, the bush 1 is reliably connected to the engine mounting table 14 and always fixed at a reference potential, and maintaining this state is a basic condition for deriving the detection signal, which is a prerequisite for using the detector. .
검출기를 엔진에 부착한 상태에서, 부시(1)의 지지면(1a)는 엔진부착대(14)와 맞닿고 있어 이 부위에서는 면접촉에 의한 접속으로 되어 있다.In the state where the detector is attached to the engine, the support surface 1a of the bush 1 is in contact with the engine mounting base 14, and connection is made by surface contact at this site.
또, 고정볼트(13)의 지지면과 부시(1)의 선단면이 맞닿는 것에 의한 면접촉의 접속 및 고정볼트(13)의 나사와 엔진부착대(14)의 나사의 결합을 거쳐서 엔진부착대(14)에 접속된다.In addition, the engine mounting table is connected to the surface contact by contacting the support surface of the fixing bolt 13 and the tip surface of the bush 1, and the coupling of the screw of the fixing bolt 13 and the screw of the engine mounting table 14. (14).
이상과 같이 부시(1)의 엔진부착대(14)로의 접속(기준전위 ＝ GND의 접속)은 다음의 2계통이 있다.As described above, the bush 1 is connected to the engine mounting base 14 (connection of reference potential = GND) in the following two systems.
(a)부시(1)의 지지면(1a)와 엔진부착대(14)의 면끼리의 접촉에 의한 접속.(a) Connection by the contact surface of the support surface 1a of the bushing 1, and the surface of the engine mounting stand 14.
(b)부시(1)의 선단면과 고정볼트(13)의 지지면끼리의 접촉에 의한 접속 및 고정볼트(13)과 엔진부착대(14)의 나사결합에 의한 접속을 거쳐서의 엔진 부착대(14)와의 접속.(b) Engine mounting table through connection between the tip surface of the bushing 1 and the support surface of the fixing bolt 13 and the connection by screwing the fixing bolt 13 and the engine mounting bracket 14 Connection with (14).
그래서 상기 (a), (b)의 GND 계가 정상, 즉 부시(1)과 엔진부착대(14)가 확실하게 접속되어 있는 경우는 제 3 도에 등 가회도로로서, 도시한 바와 같이, 출력단자(4)에 도출된 압전소자(6)의 출력은 정상적으로 제어 유니트로 입력되어 바라는 진동검출이 실행된다.Therefore, when the GND system of (a) and (b) is normal, that is, when the bush 1 and the engine mounting table 14 are securely connected, as shown in FIG. The output of the piezoelectric element 6 derived in (4) is normally input to the control unit, and the desired vibration detection is performed.
이것에 반하여 부시(1)과 엔진부착대(14)가 서로 불도통으로 부시(1)의 전위가 기준으로 되는 엔진부착대(14)의 전위에 고정되지 않고, (a), 및 (b)의 GND 계가 이상이 있을때는 제 4 도에 등가회로로 도시한 바와같이 압전소자(6)의 기준 전위가 플로팅상태로 되어 정확한 진동 검출이 불가능하게 된다.On the contrary, the bush 1 and the engine mounting stand 14 are not fixed to each other and are not fixed to the potential of the engine mounting stand 14 on which the potential of the bush 1 is a reference, and the (a) and (b) When the GND system is abnormal, as shown by the equivalent circuit in FIG. 4, the reference potential of the piezoelectric element 6 is in a floating state, so that accurate vibration detection is impossible.
이상과 같은 종래의 진동 검출기는 어트것의 GND 계도 면의 접촉에 의한 접속이고, 엔진과 같이 나쁜 환경하에서 사용하는 것에서는 물, 가스등에 의한 지지면의 녹에 의하 도통분량이나 기름막의 개재에 의한 절연이 발생하고, 자동차등의 수년~수10년에 걸친 긴 사용기간중 항상 확실하게 부시와 엔진을 접속하고, 기준 전위로 고정, 유지하여 검출 신호 도출의 전제조건을 확보하는 것은 대단히 곤란하였다.The conventional vibration detector as described above is connected by contacting the surface of the GND system of an attrition, and in the case of using in a bad environment such as an engine, due to the conduction amount and the presence of an oil film due to rust of the support surface by water, gas, etc. Insulation occurred, and it was very difficult to secure the preconditions for deriving the detection signal by reliably connecting the bush and the engine, and fixing and maintaining the reference potential at all times during a long service life of several decades to several decades.
본 고안은 이와 같은 문제를 해결하기 위해 이루어진 것으로, 부착면의 도통을 확보할수 있는 진동 검출기를 얻는 것을 목적으로 한다.The present invention has been made to solve such a problem, and an object thereof is to obtain a vibration detector that can secure conduction of an attachment surface.
본 고안에 관한 진동 검출기는 부착용의 지지면과 피검출상대면사이에 도통 유지물질을 개재해서 형성되는 것이다.The vibration detector according to the present invention is formed between a support surface for attachment and an object to be detected interposed with a conduction holding material.
본 고안에 있어서는 부착면과 피검출 상대면사이에 절연물의 생성을 방지하는 물질 또는 도전성을 유지하는 물질로 되는 도통 유지물질을 개재시킨 것에 의해 검출시의 기준 전위가 확실하게 항상 GND 전위로 확보된다.In the present invention, the reference potential at the time of detection is reliably maintained at the GND potential by interposing a conduction holding material made of a material which prevents the formation of an insulator or a conductive material between the attachment surface and the counterpart to be detected. .
제 1 도는 본 고안의 1 실시예를 도시한 것으로서, 부시(1)의 지지면(1a)와 엔진부착대(14)의 부착면사이에 도통 유지물질(15)가 개재하고 있다.1 shows an embodiment of the present invention, in which a conduction holding material 15 is interposed between the support surface 1a of the bush 1 and the attachment surface of the engine mount 14.
그외에 제 2 도와 동일 부호는 동일 부분이다.In addition, 2nd degree and the same code | symbol are the same part.
도통유지물질(15)로서는, 예를 들면 그레이스 재팬 주식회사의 전기전도성 접착제 C-770-4(체적저항 0.001Ω㎝), C-930-55-7(체적저항 0.005Ω㎝), 또는 나가세 치바 주식회사의 도전성 접착제 XNR 5302, XNR 5303, XNR 5350(체적저항은 각각 5×10-4, 1×10-4, 2×10-4Ω㎝)이 있다.As the conduction holding material 15, for example, electrically conductive adhesive C-770-4 (volume resistance 0.001 kcm), C-930-55-7 (volume resistance 0.005 kcm) from Grace Japan, or Nagase Chiba Co., Ltd. The conductive adhesives XNR 5302, XNR 5303, and XNR 5350 (volume resistances of 5 × 10 −4 , 1 × 10 −4 , and 2 × 10 −4 dBm, respectively) are available.
또한 스미또모 스리엠 주식회사의 도전성 테이프, 제품 NO. 1170, NO. 1181또는 도전성위셔, 제품 NO. 1245 등이 생각되고, 이 경우는 재료의 양면에 접착풀을 도포하여 양면에서 밀착 시키면 된다.In addition, Sumitomo 3M's conductive tape, product NO. 1170, NO. 1181 or conductive washer, product NO. 1245 or the like, in this case, the adhesive paste may be applied to both surfaces of the material and adhered from both sides.
또, 도통유지물질(15)로서 절연물질의 생성을 방지하는 물질을 사용해도 좋다.As the conduction holding material 15, a material for preventing the formation of an insulating material may be used.
이와 같은 물질로서는 박막 그리스등이 고려된다.As such a substance, thin film grease or the like is considered.
그리스는 기본 물성이 절연체이지만 박막으로서 사용하면 검출기 장착시 부시 지지면(1a)를 눌러 붙이므로, 막이 파손되어 미소한 단위에서 상대 지지면과의 도통이 끊어진다.Although grease is an insulator with basic properties, when used as a thin film, the bush supporting surface 1a is pressed when the detector is mounted, so that the film is broken and the conduction with the mating supporting surface is broken in a minute unit.
이상의 구성에 의해 부시(1)의 지지면(1a)와 엔진부착대(14)의 부착면사이에 도통유지물질(15)를 개재했으므로, 검출시의 기준전위가 확실하게 항사 GND 전위로 확보되고, 환경여하에 의하지 않고 장기간에 걸쳐 검출기능을 유지 확보할 수 가 있다.Since the conduction holding material 15 is interposed between the support surface 1a of the bush 1 and the attachment surface of the engine mounting stand 14 by the above structure, the reference potential at the time of detection is reliably ensured by the constant GND potential. Therefore, the detection function can be maintained for a long time regardless of environmental conditions.
본 고안은 이상의 설명에서 명백한 바와 같이 부착면과 피검출상대면사이에 도통 유지물질을 개재시켰으므로, 부착면부위의 도통을 확보하여, 검출신호 도출의 전제조건을 항상 구비할 수가 있다.The present invention interposed a conduction holding material between the attaching surface and the object to be detected, as apparent from the above description, so that conduction of the attaching surface portion can be ensured, and the precondition for deriving the detection signal can always be provided.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988074791U JPH01179271U (en) | 1988-06-07 | 1988-06-07 | |
| JP63-74791(U) | 1988-06-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900001198U KR900001198U (en) | 1990-01-18 |
| KR920002624Y1 true KR920002624Y1 (en) | 1992-04-27 |
Family
ID=13557470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890007033U Expired KR920002624Y1 (en) | 1988-06-07 | 1989-05-29 | Vibration detector |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH01179271U (en) |
| KR (1) | KR920002624Y1 (en) |
-
1988
- 1988-06-07 JP JP1988074791U patent/JPH01179271U/ja active Pending
-
1989
- 1989-05-29 KR KR2019890007033U patent/KR920002624Y1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR900001198U (en) | 1990-01-18 |
| JPH01179271U (en) | 1989-12-22 |
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