KR940001282Y1 - Battery discharge sensor for camcorder - Google Patents
Battery discharge sensor for camcorder Download PDFInfo
- Publication number
- KR940001282Y1 KR940001282Y1 KR2019880009850U KR880009850U KR940001282Y1 KR 940001282 Y1 KR940001282 Y1 KR 940001282Y1 KR 2019880009850 U KR2019880009850 U KR 2019880009850U KR 880009850 U KR880009850 U KR 880009850U KR 940001282 Y1 KR940001282 Y1 KR 940001282Y1
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- South Korea
- Prior art keywords
- amplifier
- battery
- time
- switch
- circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/65—Control of camera operation in relation to power supply
- H04N23/651—Control of camera operation in relation to power supply for reducing power consumption by affecting camera operations, e.g. sleep mode, hibernation mode or power off of selective parts of the camera
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.
제2도는 종래의 회로도.2 is a conventional circuit diagram.
제3도는 일반적인 재충전용 밧데리의 방전 특성도.3 is a discharge characteristic of a typical rechargeable battery.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 미분회로 2, 3, 4 : OP 앰프1: Differential Circuit 2, 3, 4: OP Amplifier
5 : 일정시간 지연회로 6 : 부하5: constant time delay circuit 6: load
SW1, SW2: 스위치 Q1: 트랜지스터SW 1 , SW 2 : switch Q 1 : transistor
RY : 릴레이 R1-R11: 저항RY: relay R 1 -R 11 : resistance
D1-D3: 다이오드 C1, C2: 콘덴서D 1 -D 3 : Diodes C 1 , C 2 : Capacitors
본 고안은 캠코더용 밧데리의 방전 감지 및 전원 차단회로에 관한 것으로, 특히 Ni-Cd 전지등의 재충전용 밧데리를 전원으로 사용하는 제품에 적당하도록 한것이다.The present invention relates to a discharge detection and power cut-off circuit of a battery for a camcorder, and is particularly suitable for a product using a rechargeable battery such as a Ni-Cd battery as a power source.
종래에는 제2도에 도시된 바와같이 다이오드(D1)를 통하여 출력되는 밧데리(B)의 전압을 저항(R1)(R2)과 가변저항(VR)으로 분압시켜 전압레벨을 감지하도록 하였으며, 밧데리(B) 방전시 과방전시키거나 미방전시키면 밧데리(B)의 특성이 나쁜영향을 주게되므로 적정시점에서 방전을 정지시켜 주어야 하였다.Conventionally, as shown in FIG. 2, the voltage of the battery B output through the diode D 1 is divided by the resistor R 1 (R 2 ) and the variable resistor VR to sense the voltage level. If the battery (B) is over discharged or not discharged, the characteristics of the battery (B) are adversely affected. Therefore, the discharge should be stopped at an appropriate time.
그러나, 종래에는 단순히 일정한 레벨로 고정된 전압에서 방전을 정지시켜 주므로 온도가 높아서 밧데리(B)전압이 상승되었을 경우 방전시키면 과방전되기 쉽고 반면에 온도가 낮을 경우에는 상기와 반대의 현상이 나타날 수 있어 정확한 방전 정지시점을 찾기가 어려운 결점이 있었다.However, in the related art, since the discharge is stopped at a fixed voltage simply at a constant level, when the battery (B) voltage is increased due to a high temperature, the battery is easily discharged when discharged, whereas when the temperature is low, the opposite phenomenon may occur. It was difficult to find the exact stop point of discharge.
본 고안은 이와같은 종래의 결점을 감안하여 안출한 것으로 이를 첨부된 도면 제1도에 의하여 상세히 설명하면 다음과 같다.The present invention has been devised in view of the above-mentioned drawbacks and will be described in detail with reference to FIG.
밧데리(B)전원을 다이오드(D1)를 통하여 부하(6)에 공급해주는 회로에 있어서, 다이오드(D1)와 부하(6)사이에 릴레이(RY)에 의해 연동되는 스위치(SW2)와 파우어온 스위치(SW1)를 병렬 접속하고 이들 스위치(SW1)(SW2) 후단에는 콘덴서(C1)와 저항(R1)으로된 미분회로(1)와 OP 앰프(2)를 통하여 OP 앰프(3)의 반전단자(-)를 접속함과 아울러 다이오드(D2)(D3)의 저항(R5-R11) 그리고 OP 앰프(4)와 콘덴서(C2)로 된 일정시간 지연회로(5)를 접속하며, 상기 OP 앰프(3)의 출력단에는 컬렉터에 릴레이(RY)가 접속된 트랜지스터(Q1)의 베이스를 접속하여서 구성된 것이다.In the circuit that a battery (B) power supply via a diode (D 1) supplied to the load (6), a diode (D 1) and the switch (SW 2) that are linked by a relay (RY) between the load (6) and The power-on switch (SW 1 ) is connected in parallel, and after the switch (SW 1 ) (SW 2 ), the OP is connected through the differential circuit (1) and the op amp (2), each of which is a capacitor (C 1 ) and a resistor (R 1 ). In addition to connecting the inverting terminal (-) of the amplifier (3), the resistor (R 5- R 11 ) of the diodes (D 2 ) (D 3 ) and a constant time delay of the OP amplifier (4) and the capacitor (C 2 ) The circuit 5 is connected, and the output terminal of the OP amplifier 3 is connected by connecting the base of the transistor Q 1 with the relay RY connected to the collector.
이와같이 구성된 본 고안은 통상적으로 재충전용 밧데리(B)를 방전시킬때의 방전특성 그래프는 제3도와 같이 초기순간에 전압이 하강한 후 거의 일정한 레벨을 유지하게되며 방전말기에는 전압이 급격히 하강하는 특성을 가지고 있는 것을 감안하여 밧데리 전압(VB)을 시간(t)측에 대해 미분한 전압을 감지하므로 적당한 값에서 방전을 종지시키게 한것이다.In the present invention configured as described above, the discharge characteristic graph when discharging the rechargeable battery (B) is maintained at a substantially constant level after the voltage drops at an initial instant as shown in FIG. 3 and the voltage drops rapidly at the end of discharge. In consideration of the fact that the battery voltage (V B ) detects the differential voltage with respect to the time (t) side, the discharge is terminated at an appropriate value.
즉, 스위치(SW1)를 누르면 순간적으로 Vref 전압이 출력되어 OP 앰프(3)의 비반전단자(+)에 입력되고, 반전단자(-)에는 일정시간 지연회로(5)에 의해 로우레벨이 입력되므로 OP 앰프(3)의 출력은 하이레벨이 되어 트랜지스터(Q1)를 온시킴과 동시에 릴레이(RY)가 구동되고, 이에따라 스위치(SW2)는 NC 단자에 붙게되므로 밧데리(B) 전원이 부하(6)에 인가된다.That is, when the switch SW 1 is pressed, the Vref voltage is instantaneously output and input to the non-inverting terminal (+) of the OP amplifier 3, and the low level is applied to the inverting terminal (-) by the delay circuit 5 for a predetermined time. Since the input of the OP amplifier 3 is at a high level, the transistor Q 1 is turned on and the relay RY is driven. As a result, the switch SW 2 is attached to the NC terminal, so that the battery B is powered. Is applied to the load 6.
또한, 스위치(SW2)가 일단 NC 단자에 붙은후 제3도의 시간(t1)까지는 일정시간 지연회로(5)의 출력은 로우레벨을 유지하게되며 이로인해 OP 앰프(3)의 출력은 하이레벨을 유지하여 트랜지스터(Q1)를 계속 온시키게 되고 시간(t1)이후에는 OP 앰프(2)의 출력전압과 Vref를 OP 앰프(3)가 비교하여 시간(t3)까지는 출력이 하이레벨이 된다.In addition, the output of the delay circuit 5 is maintained at a low level until the time t 1 of FIG. 3 after the switch SW 2 is connected to the NC terminal, so that the output of the OP amplifier 3 is high. The transistor Q 1 is kept on by keeping the level, and after the time t 1 , the output voltage of the OP amplifier 2 and Vref are compared by the OP amplifier 3 , and the output is high level until the time t 3 . Becomes
이후 시간(t3)이 되어 방전특성 그래프의 기울기가 급격히 떨어지는 시점이 되면 OP 앰프(3)의 출력이 하이레벨에서 로우레벨로 바뀌면서 트랜지스터(Q1)가 오프되므로 릴레이(RY)도 구동되지 않게됨과 동시에 스위치(SW2)는 NO로 복귀되어 밧데리(B)의 전원이 차단되고, 이에다라 부하(6)에는 전원이 인가되지 않게되는 것이다.When the time t 3 reaches a point where the slope of the discharge characteristic graph falls sharply, the output of the OP amplifier 3 changes from a high level to a low level, so that the transistor Q 1 is turned off so that the relay RY is not driven. At the same time, the switch SW 2 is returned to NO and the power of the battery B is cut off, and thus the power is not applied to the load 6.
여기서 일정시간 지연회로(5)의 동작을 설명하면 다음과 같다.Herein, the operation of the constant time delay circuit 5 will be described.
즉, 스위치(SW1)가 온되어 Vref가 인가되면 OP 앰프(4)의 반전단자(-)에는 저항(R6)(R7)(R9)에 의해 분압된 Vref가 인가되고 비반전단자(+)에는 초기순간에 저항(R5)(R8)(R9)에 의해 분압된 Vref가 인가되며 만일 상기의 저항(R6)(R7)(R9)에 의해 분압된 Vref가 저항(R5)(R8)(R9)에 의해 분압된 Vref보다 크도록 저항값을 설정하면 OP 앰프(4)의 출력은 로우레벨을 유지하는데, 저항(R8, R10, R11)을 통해 콘덴서(C2)에 충전된 전압이 시간(t1)이 경과된후 저항(R11)과 다이오드(D3)를 통해 방전할때 OP 앰프(4)의 비반전 입력전압이 반전입력전압보다 커지도록 상수를 설정해 놓고 있다.That is, when the switch SW 1 is turned on and Vref is applied, the Vref divided by the resistors R 6 (R 7 ) and R 9 is applied to the inverting terminal (-) of the OP amplifier 4 and the non-inverting terminal is applied. (+), the resistance (R 5) (R 8) (R 9) the applied Vref and the if said resistor (R 6) divided by (R 7) (R 9) the divided by Vref in the initial moment When the resistor value is set to be greater than the Vref divided by the resistors R 5 (R 8 ) (R 9 ), the output of the OP amplifier 4 maintains the low level, and the resistors R 8 , R 10 , R 11 The non-inverting input voltage of the OP amplifier 4 is reversed when the voltage charged in the capacitor C 2 through the discharge through the resistor R 11 and the diode D 3 after the time t 1 elapses. The constant is set to be greater than the input voltage.
따라서, 시간(t1)까지는 OP 앰프(4) 출력이 로우레벨을 유지하나 시간(t1)이후에는 하이레벨로 변하게 된다.Therefore, the output of the OP amplifier 4 maintains the low level until the time t 1 , but changes to the high level after the time t 1 .
이상에서 설명한 바와같이 본 고안은 종래의 회로가 단순히 일정전압을 방전종지 전압으로 고정해놓고 이 시점에서 방전을 정지시켜 주는것에 비해 방전전압의 시간적 변화율을 감지하여 충전을 정지시키므로써 온도에 관계없이 방전을 정지시키는 시점을 정확히 찾아내어 전원을 차단시켜 줄 수 있는 효과가 있다.As described above, the present invention merely detects the rate of change of the discharge voltage and stops the charging by stopping the discharge at this point, whereas the conventional circuit simply fixes the constant voltage at the discharge end voltage and discharges regardless of the temperature. Find out exactly when to stop the power is effective to cut off the power.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880009850U KR940001282Y1 (en) | 1988-06-25 | 1988-06-25 | Battery discharge sensor for camcorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880009850U KR940001282Y1 (en) | 1988-06-25 | 1988-06-25 | Battery discharge sensor for camcorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900001940U KR900001940U (en) | 1990-01-19 |
| KR940001282Y1 true KR940001282Y1 (en) | 1994-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019880009850U KR940001282Y1 (en) | 1988-06-25 | 1988-06-25 | Battery discharge sensor for camcorder |
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| Country | Link |
|---|---|
| KR (1) | KR940001282Y1 (en) |
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1988
- 1988-06-25 KR KR2019880009850U patent/KR940001282Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR900001940U (en) | 1990-01-19 |
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