CN211902713U - Light filling lamp stroboscopic and flashing switch selection circuit that exposes to sun - Google Patents

Abstract

The utility model discloses a stroboscopic of light filling lamp and exposure switch selection circuit, including enabling circuit, control circuit and port circuit, enabling circuit and control circuit are coupled, and control circuit and port circuit are coupled, and port circuit and external drive circuit are coupled, export port information to external drive circuit; the port circuit comprises a first logic control chip, the control circuit comprises a second logic control chip, the first logic control chip is coupled with the second logic control chip, the first logic control chip is coupled with an external driving circuit, and the second logic control chip is coupled with the enabling circuit; in different environments, different shooting requirements of camera monitoring are met, shot pictures are clearer, the mode that a controller is combined with an enabling circuit is eliminated, the traditional method that a controller selection switch is independently adopted to switch on and off a light supplement lamp mode is eliminated, and stability of the light supplement lamp can be ensured under the condition of long-term operation.

Description

Light filling lamp stroboscopic and flashing switch selection circuit that exposes to sun

Technical Field

The utility model relates to a traffic and electric and electronic field specifically are a light filling lamp stroboscopic and flashing switch selection circuit that exposes to sun.

Background

Electronic monitoring equipment can all be installed in the highway section that a lot of traffic flow and pedestrian flow are lusterless nowadays, and the condition to vehicle or road surface through monitors and shoots, but the camera can have because reasons such as ambient light are unclear the condition in shooting, need the light filling lamp to carry out the light filling when the camera is shot. The mode that the camera was shot also can have the difference, and the light filling lamp also needs to adjust the light filling mode according to the mode that the camera was shot simultaneously.

The conventional switch selection is generally realized by directly selecting on and off of the switch through a controller to switch a light supplement mode, and the stability of the selection mode is not enough to ensure the normal work of a light supplement lamp which runs uninterruptedly for a long time.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a light filling lamp stroboscopic and flash switch selection circuit that exposes to sun combines enabling circuit to improve the stability of light filling lamp mode selection through the controller.

In order to achieve the above purpose, the utility model provides a following technical scheme: a light supplementing lamp stroboscopic and flashing exposure switch selection circuit comprises an enabling circuit, a control circuit and a port circuit, wherein the enabling circuit is coupled with the control circuit to output an enabling signal to the control circuit; the port circuit comprises a first logic control chip, the control circuit comprises a second logic control chip, the first logic control chip and the second logic control chip are coupled, the first logic control chip is coupled with an external driving circuit, and the second logic control chip is coupled with an enabling circuit.

As a further improvement of the present invention, the enabling circuit includes an active enabling circuit and a passive enabling circuit, an input end of the active enabling circuit is coupled to the external controller, an output end of the active enabling circuit is coupled to the second logic control chip through a diode D38, an anode of the diode D38 is coupled to the second logic control chip, and a cathode of the diode D38 is coupled to the active enabling circuit; the input end of the passive enabling circuit is coupled to an external stroboscopic input circuit, the first output end of the passive enabling circuit is coupled to the first logic control chip, the second output end of the passive enabling circuit is coupled to the second logic control chip through a diode D37, the anode of the diode D37 is coupled to the second logic control chip, and the cathode of the diode D37 is coupled to the passive enabling circuit.

As a further improvement of the present invention, the active enable circuit includes a first operational amplifier chip, an output pin of the first operational amplifier chip is coupled to a negative electrode of the diode D38, an input pin is coupled to an external controller through the diode D23 and the capacitor C2 connected in series, an anode of the diode D23 is coupled to the capacitor C2, and a negative electrode is coupled to the input pin of the first operational amplifier chip; the cathode of the diode D23 is grounded through a resistor R17 and a capacitor C3 which are connected in parallel, the anode is grounded through a diode D3 and a resistor R14 which are connected in series, the anode of the diode D3 is coupled to a resistor R14, and the cathode is coupled to the anode of the diode D23.

As a further improvement of the present invention, the passive enable circuit includes a port enable circuit and a control enable circuit, an input end of the port enable circuit is coupled to the external strobe input circuit, and an output end of the port enable circuit is coupled to the first logic control chip to output a port enable signal; the input end of the control enabling circuit is coupled with the port enabling circuit, and the output end of the control enabling circuit is coupled with the diode D37 to output a control enabling signal.

As a further improvement of the utility model, the chip is put to port enabling circuit includes the second fortune, the in-phase input pin that the chip was put to the second fortune is coupled to control enabling circuit, and the in-phase input pin is coupled to outside stroboscopic input circuit through resistance R67, and resistance R67 both ends are parallelly connected to have resistance R70 and diode D32 of establishing ties each other, diode D32's positive pole is coupled to outside stroboscopic input circuit, and the negative pole is coupled to resistance R70, the in-phase input pin still passes through electric capacity C57 ground connection, the output that the chip was put to the second fortune is coupled to first logic control chip.

As a further improvement of the utility model, the chip is put including the third fortune to control enabling circuit, the in-phase input pin that the chip was put to the third fortune is coupled to external power source through resistance R93, still through thermistor RT2 ground connection, the in-phase input pin that the chip was put to the third fortune is coupled to the in-phase input pin that the chip was put to the second fortune, it has resistance R92 to establish ties between the in-phase input pin that the chip was put to the third fortune and the output, the output coupling that the chip was put to the third fortune is to diode D37.

The utility model has the advantages that: in different environments, different shooting requirements of camera monitoring are met, shot pictures are clearer, the mode that a controller is combined with an enabling circuit is eliminated, the traditional method that a controller selection switch is independently adopted to switch on and off a light supplement lamp mode is eliminated, and stability of the light supplement lamp can be ensured under the condition of long-term operation.

Drawings

Fig. 1 is a block diagram of the circuit structure of the present invention;

fig. 2 is a schematic circuit diagram of the present invention.

Reference numerals: 1. an enable circuit; 11. an active enable circuit; 111. a first operational amplifier chip; 12. a passive enable circuit; 121. a port enable circuit; 1211. a second operational amplifier chip; 122. a control enable circuit; 1221. a third operational amplifier chip; 2. a control circuit; 21. a second logic control chip; 3. a port circuit; 31. a first logic control chip; 4. an external drive circuit; 5. an external strobe input circuit; 6. an external exposure input circuit; 7. an external controller.

Detailed Description

The present invention will be described in further detail with reference to embodiments shown in the drawings.

Referring to fig. 1-2, the present embodiment is a flash and flash switch selection circuit for a fill-in light, including an enable circuit 1, a control circuit 2 and a port circuit 3, where the enable circuit 1 is coupled to the control circuit 2 to output an enable signal to the control circuit 2, the control circuit 2 is coupled to the port circuit 3 to output a control signal to the port circuit 3, and the port circuit 3 is coupled to an external driving circuit 4 to output port information to the external driving circuit 4; the port circuit 3 comprises a first logic control chip 31, the control circuit 2 comprises a second logic control chip 21, the first logic control chip 31 is coupled with the external driving circuit 4, and the second logic control chip 21 is coupled with the enabling circuit 1.

Through the technical scheme, the enabling circuit 1 sends an enabling signal to the second logic control chip 21 of the control circuit 2, the second logic control chip 21 in the control circuit 2 outputs a control signal to the port circuit 3, and the first logic control chip 31 in the port circuit 3 outputs a driving signal to the external driving circuit 4 after logic comparison so as to control and select a flash and an exposure circuit of the fill-in light; the enabling signal that enables circuit 1 and send is different, the signal that first logic control chip 31 and second logic control chip 21 exported is also different, the purpose of selecting different circuits has been reached, in the environment of difference, satisfy the different shooting needs of camera control, the picture that makes the shooting is more clear, and combine the mode that enables circuit 1 through the controller, get rid of the traditional method that adopts controller selector switch alone to open and close and switch the light filling lamp mode, can let the light filling lamp ensure stability under the condition of long-term operation.

As an improved embodiment, the enabling circuit 1 includes an active enabling circuit 11 and a passive enabling circuit 12, an input terminal of the active enabling circuit 11 is coupled to the external controller 7, an output terminal is coupled to the second logic control chip 21 through a diode D38, an anode of a diode D38 is coupled to the second logic control chip 21, and a cathode of the diode D38 is coupled to the active enabling circuit 11; the input terminal of the passive enable circuit 12 is coupled to the external strobe input circuit 5, the first output terminal of the passive enable circuit 12 is coupled to the first logic control chip 31, the second output terminal is coupled to the second logic control chip 21 through the diode D37, the anode of the diode D37 is coupled to the second logic control chip 21, and the cathode of the diode is coupled to the passive enable circuit 12.

Through the above technical solution, the active enable circuit 11 receives the signal from the external controller 7 and outputs an active enable signal to the second logic control chip 21 through the diode D38, and the passive enable circuit 12 receives the strobe input signal from the external strobe input circuit 5 and outputs a passive enable signal to the second logic control chip 21 through the diode D37. The controller is set, the active enable circuit 11 actively outputs an enable signal under a set condition, and the passive enable circuit 12 can passively drive the first logic control chip 31 to enable when a strobe signal is input through the external strobe input circuit 5, and meanwhile, the second logic control chip 21 is associated to enable the first logic control chip and the second logic control chip passively. Through setting up two kinds of circuits of initiative enable and passive enable, can let the enabling mode of circuit more various, can not excessively rely on the control of controller, improve the stability of circuit operation under passive enabling circuit 12's assistance.

The diode D37 and the diode D38 both adopt BAV21W, and the diodes are fast switching diodes, so that the conduction time is short, and the switching speed is high; the NL27WZ32 is adopted as the first logic control chip 31, and the chip is a high-performance dual-input OR gate chip and is high in response speed; the second logic control chip 21 employs NL7SZ57, which is a multi-function logic gate.

As an improved embodiment, the active enabling circuit 11 includes a first operational amplifier chip 111, an output pin of the first operational amplifier chip 111 is coupled to a cathode of a diode D38, an input pin is coupled to the external controller 7 through a diode D23 and a capacitor C2 connected in series, an anode of the diode D23 is coupled to the capacitor C2, and a cathode of the diode is coupled to the input pin of the first operational amplifier chip 111; the cathode of the diode D23 is grounded through a resistor R17 and a capacitor C3 which are connected in parallel, the anode is grounded through a diode D3 and a resistor R14 which are connected in series, the anode of the diode D3 is coupled to a resistor R14, and the cathode is coupled to the anode of the diode D23.

Through the technical scheme, the first operational amplifier chip 111 receives signals sent by the external controller 7, outputs active enabling signals to the control circuit 2 of the next stage after passing through the operational amplifier chip, and the resistor R17 and the capacitor C3 which are connected in parallel can play roles of isolation and filtering. As shown in the figure, the operational amplifier forms a comparison circuit, interference can be further filtered, an isolation effect can be achieved through the comparison circuit, isolation is achieved between the external controller 7 and the second logic control chip 21, and the anti-interference capacity of the circuit is improved.

The first operational amplifier chip 111 adopts CN958, and the chip comprises an operational amplifier and a reference voltage source, so that the power consumption is low and the stability is strong; the diode D3 and the diode D23 both adopt BAV21W, and the diodes are fast switching diodes, are short in conduction time and are fast in switching speed.

As a modified embodiment, the passive enable circuit 12 includes a port enable circuit 121 and a control enable circuit 122, an input terminal of the port enable circuit 121 is coupled to the external strobe input circuit 5, and an output terminal thereof is coupled to the first logic control chip 31 to output a port enable signal; the control enable circuit 122 has an input coupled to the port enable circuit 121 and an output coupled to the diode D37 for outputting a control enable signal.

Through the above technical solution, when the external strobe input circuit 5 outputs the strobe input signal to the port enabling circuit 121, the port enabling circuit 121 outputs the port enabling signal to the first logic control chip 31 in the port circuit 3, the input terminal of the control enabling circuit 122 is coupled to the input terminal of the port enabling circuit 121, and the output terminal outputs the control enabling signal to the control circuit 2 through the diode D37. Set up port enabling circuit 121 and control enabling circuit 122, and control enabling circuit 122's input is coupled with port enabling circuit 121, can be through the mode of port enabling circuit 121 and the linkage of control enabling circuit 122 this moment, utilize a stroboscopic input signal independently to two circuits enable, and this circuit only need accept the signal of outside stroboscopic input circuit 5 output, can break away from the controller, make the circuit independent operation, it is more stable, avoid the interference that the controller brought.

As an improved embodiment, the port enabling circuit 121 includes a second operational amplifier chip 1211, a non-inverting input pin of the second operational amplifier chip 1211 is coupled to the control enabling circuit 122, an inverting input pin is coupled to the external strobe input circuit 5 through a resistor R67, two ends of a resistor R67 are connected in parallel to a resistor R70 and a diode D32, the anode of the diode D32 is coupled to the external strobe input circuit 5, the cathode of the diode D32 is coupled to a resistor R70, the inverting input pin is further grounded through a capacitor C57, and an output end of the second operational amplifier chip 1211 is coupled to the first logic control chip 31.

Through the above technical solution, when the external strobe input circuit 5 outputs the strobe input signal, the inverted input pin of the second operational amplifier 1211 receives the strobe input signal, and the output port enable signal is sent to the first logic control chip 31. The second operational amplifier 1211 can isolate the external strobe input circuit 5 from the port circuit 3, so as to improve the anti-interference capability of the circuit.

The second operational amplifier 1211 employs CN951, and the chip includes an operational amplifier and a reference voltage source, and has low power consumption and high stability.

As an improved specific embodiment, the control enable circuit 122 includes a third operational amplifier chip 1221, a non-inverting input pin of the third operational amplifier chip 1221 is coupled to an external power supply through a resistor R93 and is further coupled to ground through a thermistor RT2, an inverting input pin of the third operational amplifier chip 1221 is coupled to a non-inverting input pin of the second operational amplifier chip 1211, a resistor R92 is connected in series between the non-inverting input pin and an output terminal of the third operational amplifier chip 1221, and the output terminal of the third operational amplifier chip 1221 is coupled to a diode D37.

Through the technical scheme, the thermistor RT2 and the resistor R93 form a voltage division circuit, the voltage obtained by voltage division of the thermistor RT2 changes according to the change of the temperature of the environment, the voltage signal acquired by the positive phase input pin of the third operational amplifier chip 1221 changes, and the output control enabling signal also changes accordingly. The thermistor can also adjust the enabling of the second logic control chip 21 according to the working state of the circuit, and the circuit is prevented from continuously working under the abnormal working state to cause circuit damage. The third operational amplifier chip 1221 can relatively isolate the port enabling circuit 121 from the control circuit 2, thereby improving the anti-interference capability of the circuit.

The third operational amplifier chip 1221 adopts CN951, and the chip includes an operational amplifier and a reference voltage source, and has low power consumption and high stability.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The light supplementing lamp stroboscopic and flashing exposure switch selection circuit is characterized by comprising an enabling circuit (1), a control circuit (2) and a port circuit (3), wherein the enabling circuit (1) is coupled with the control circuit (2) to output an enabling signal to the control circuit (2), the control circuit (2) is coupled with the port circuit (3) to output a control signal to the port circuit (3), and the port circuit (3) is coupled with an external drive circuit (4) to output port information to the external drive circuit (4); the port circuit (3) comprises a first logic control chip (31), the control circuit (2) comprises a second logic control chip (21), the first logic control chip (31) and the second logic control chip (21) are coupled, the first logic control chip (31) is coupled with an external driving circuit (4), and the second logic control chip (21) is coupled with an enabling circuit (1).

2. A fill light strobing and flashing switch selection circuit according to claim 1, wherein the enabling circuit (1) comprises an active enabling circuit (11) and a passive enabling circuit (12), an input terminal of the active enabling circuit (11) is coupled to the external controller (7), an output terminal of the active enabling circuit is coupled to the control circuit (2) through a diode D38, an anode of the diode D38 is coupled to the control circuit (2), and a cathode of the diode D38 is coupled to the active enabling circuit (11); the input end of the passive enabling circuit (12) is coupled to the external strobe input circuit (5), the first output end of the passive enabling circuit (12) is coupled to the port circuit (3), the second output end is coupled to the control circuit (2) through a diode D37, the anode of the diode D37 is coupled to the control circuit (2), and the cathode of the diode is coupled to the passive enabling circuit (12).

3. The light supplement lamp stroboscopic and flash exposure switch selection circuit of claim 2, wherein the active enabling circuit (11) comprises a first operational amplifier chip (111), an output pin of the first operational amplifier chip (111) is coupled to a cathode of a diode D38, an input pin is coupled to the external controller (7) through a diode D23 and a capacitor C2 connected in series, an anode of the diode D23 is coupled to a capacitor C2, and a cathode of the diode D23 is coupled to the input pin of the first operational amplifier chip (111); the cathode of the diode D23 is grounded through a resistor R17 and a capacitor C3 which are connected in parallel, the anode is grounded through a diode D3 and a resistor R14 which are connected in series, the anode of the diode D3 is coupled to a resistor R14, and the cathode is coupled to the anode of the diode D23.

4. A fill light strobe and flash switch selection circuit as in claim 2, wherein the passive enable circuit (12) comprises a port enable circuit (121) and a control enable circuit (122), the port enable circuit (121) has an input coupled to the external strobe input circuit (5) and an output coupled to the port circuit (3) to output a port enable signal; the input end of the control enabling circuit (122) is coupled with the port enabling circuit (121), and the output end is coupled with the control circuit (2) to output a control enabling signal.

5. The fill-in light strobing and flashing-on switch selection circuit of claim 4, wherein the port enabling circuit (121) comprises a second operational amplifier chip (1211), a non-inverting input pin of the second operational amplifier chip (1211) is coupled to the control enabling circuit (122), an inverting input pin of the second operational amplifier chip (1211) is coupled to the external strobing input circuit (5) through a resistor R67, a resistor R67 is connected in parallel with a resistor R70 and a diode D32 in series, an anode of the diode D32 is coupled to the external strobing input circuit (5), a cathode of the diode D32 is coupled to a resistor R70, the inverting input pin is further grounded through a capacitor C57, and an output end of the second operational amplifier chip (1211) is coupled to the port circuit (3).

6. The light supplement lamp stroboscopic and stroboscopic switch selection circuit of claim 4, wherein the control enable circuit (122) comprises a third operational amplifier chip (1221), a non-inverting input pin of the third operational amplifier chip (1221) is coupled to an external power supply through a resistor R93, and is further coupled to ground through a thermistor RT2, an inverting input pin of the third operational amplifier chip (1221) is coupled to the control enable circuit (122), and a resistor R92 is connected in series between the non-inverting input pin and an output terminal of the third operational amplifier chip (1221).

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