Supplementary light lamp type camera table control circuit

Abstract

The utility model discloses a kind of based on light supplementing lamp type camera table control circuit, comprising: power supply battery, power supply processing circuit, control circuit, camera driving circuit, camera, lamp driving circuit and light supplementing lamp;The anode of power supply battery is connected to power supply processing circuit input end, and power supply battery exports first voltage value;Power supply processing circuit includes: direct type step-down voltage stabilizing module and regulation type step-down voltage stabilizing module, and direct type step-down voltage stabilizing module input end is connected with regulation type step-down voltage stabilizing module input end and forms power supply processing circuit input end.The based on light supplementing lamp type camera table control circuit, solve the problem that left light supplementing lamp or right light supplementing lamp cannot be controlled to open when needed in prior art.

Description

Technical Field

[0001] This utility model relates to a gas meter or water meter with a camera function, specifically to a control circuit for a camera meter based on a supplementary light type. Background Technology

[0002] Camera meters specifically refer to gas meters or water meters with camera functions. Camera meters are the key to achieving automatic meter reading.

[0003] The applicant has designed a camera meter, which includes: a meter body, a meter cover, a camera, a left supplementary light, and a right supplementary light. The meter body is a structure of an existing water meter or gas meter. The top of the meter body is hinged to one side of the meter cover, and the meter cover can fasten the meter body. A camera is installed on the meter cover. The camera is used to take pictures of the numbers on the meter body. A left supplementary light and a right supplementary light are respectively set on the left and right sides of the camera to provide supplementary lighting when taking pictures.

[0004] There are specific situations where it is necessary to turn on the left or right fill light, but I don't know how to control the left or right fill light to turn on, so I can't turn on the left or right fill light when needed. Utility Model Content

[0005] This utility model aims to provide a control circuit based on a fill light type camera watch, which solves the problem in the prior art that the left or right fill light cannot be controlled to turn on when needed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model discloses a control circuit for a supplementary lighting camera, including: a power supply battery, a power processing circuit, a control circuit, a camera driving circuit, a camera, a lamp driving circuit, and a supplementary lighting lamp; the positive terminal of the power supply battery is connected to the input terminal of the power processing circuit, and the power supply battery outputs a first voltage value; the power processing circuit includes: a direct buck regulator module and a regulated buck regulator module, the input terminals of the direct buck regulator module and the regulated buck regulator module are connected to form the input terminal of the power processing circuit, the direct buck regulator module reduces the first voltage value to a second voltage value, the direct buck regulator module reduces the first voltage value to a third voltage value, and the output terminal of the direct buck regulator module is the power processing... The circuit has a first output terminal, and the output terminal of the adjustable step-down regulator module is the second output terminal of the power processing circuit. The control terminal of the adjustable step-down regulator module is connected to the first output terminal of the control module. The first output terminal of the power processing circuit is connected to the input terminal of the camera driver circuit and the power supply terminal of the control module. The first output terminal of the camera driver circuit is connected to the positive terminal of the camera, and the negative terminal of the camera is grounded. The control terminal of the camera driver circuit is connected to the second output terminal of the control module. The first output terminal of the camera driver circuit supplies power to the fill light through the lamp driver circuit. The control terminal of the lamp driver circuit is connected to the third output terminal of the control module. The control module has a communication connection to the display screen. The second output terminal of the power processing circuit supplies power to the display screen. The camera has a communication connection with the control module.

[0008] Preferably, the power processing circuit further includes a voltage detection module, the input terminal of which is connected to the input terminal of the direct buck regulator module, and the output terminal of which is connected to the first input terminal of the control module.

[0009] Preferably, the second output terminal of the camera driving circuit is connected to the second input terminal of the control module.

[0010] Preferably, the camera driving circuit includes: resistors R1, R2, R3, R4, and R5, a PMOS transistor Q1, and an NPN transistor Q2. The first terminal of resistor R1 and the source of PMOS transistor Q1 are connected to form the input terminal of the camera driving circuit. The drain of PMOS transistor Q1 is the first output terminal of the camera driving circuit. The gate of PMOS transistor Q1 is connected to the second terminal of resistor R1, the first terminal of resistor R3, and the first terminal of resistor R2. The second terminal of resistor R2 is the second output terminal of the camera driving circuit. The second terminal of resistor R3 is connected to the collector of NPN transistor Q2. The emitter of NPN transistor Q2 and the first terminal of resistor R4 are grounded. The second terminal of resistor R4 and the base of NPN transistor Q2 are connected to the first terminal of resistor R5. The second terminal of resistor R5 is the control terminal of the camera driving circuit.

[0011] Preferably, the lamp driving circuit includes: resistors R6, R7, and R8, and an NPN transistor Q3. The output terminal of the camera driving circuit is connected to the anode of the fill light, the cathode of the fill light is connected to the collector of the NPN transistor Q3 through resistor R6, the emitter of the NPN transistor Q3 and the first terminal of resistor R8 are grounded, the base of the NPN transistor Q3 and the second terminal of resistor R8 are connected to the first terminal of resistor R7, and the second terminal of resistor R7 is the control terminal of the lamp driving circuit.

[0012] Preferably, the direct buck regulator module includes: diode D1, capacitor C1, capacitor C2, capacitor C3, and buck regulator chip U1. The anode of diode D1 is the input terminal of the direct buck regulator module, the cathode of diode D1 is connected to the positive terminal of capacitor C1 and the IN pin of buck regulator chip U1, the OUT pin of buck regulator chip U1 is connected to the positive terminals of capacitor C1, C2, and C3, the OUT pin of buck regulator chip U1 is the output terminal of the direct buck regulator module, and the GND pin of buck regulator chip U1, the negative terminals of capacitor C1, C2, and C3 are all grounded.

[0013] Preferably, the adjustable buck regulator module includes: inductor L1, buck regulator chip U2, resistors R9 and R10, capacitors C4, C5, C6, and C7. The first end of inductor L1 is connected to the VIN pin of buck regulator chip U2 to form the input terminal of the adjustable buck regulator module. The second end of inductor L1 is connected to the SW pin of buck regulator chip U2. The GND pin of buck regulator chip U2 is grounded. The OUT pin of buck regulator chip U2 is connected to the first end of resistor R9, the positive terminals of capacitors C4, C5, C6, and C7. The FB pin of buck regulator chip U2 is connected to the second end of resistor R9 and the first end of resistor R10. The second end of resistor R10, the negative terminals of capacitors C4, C5, C6, and C7 are all grounded. The OUT pin of buck regulator chip U2 is the output terminal of the adjustable buck regulator module.

[0014] Preferably, the voltage detection module includes: resistor R11, resistor R12 and capacitor C8. The first end of resistor R11 is connected to the input terminal of the adjustable step-down regulator module, the second end of resistor R11 is connected to the first end of resistor R12 and the positive terminal of capacitor C8, and the second end of resistor R12 and the negative terminal of capacitor C8 are both grounded.

[0015] Compared to existing technologies, this utility model has the following advantages: Based on the idea of ​​setting up supplementary lights on both sides of the camera, this application designs a lamp driving circuit. This allows the control circuit to control whether the supplementary lights (both the left and right supplementary lights are driven by the same lamp driving circuit) are powered on or off, thus ensuring the supplementary lights only illuminate when needed. Since the supplementary lights only need to operate when the camera is working, this application directly sets "the first output terminal of the camera driving circuit supplies power to the supplementary lights through the lamp driving circuit." This ensures that the camera driving circuit supplies power to the supplementary lights only when it is normally supplying power to the camera. Therefore, the supplementary lights can only work when the camera driving circuit outputs voltage. If the camera driving circuit has no output voltage, the supplementary lights will not work regardless of whether the lamp driving circuit is closed or not. This avoids wasting energy by lighting up the supplementary lights when the camera is not being powered by the camera driving circuit, ensuring that the lamp driving circuit can only illuminate the supplementary lights when the camera driving circuit outputs voltage. The direct buck regulator module does not require power supply control under the control circuit because: the camera's control is more stable under the drive of the camera driver circuit, and the direct buck regulator module also directly supplies power to the control chip used in the control circuit, so that the control chip in the control circuit can always work when the power supply battery has power. However, the operating voltage of the display screen is different from that of the camera, and the display screen also needs to be controlled by the control circuit. Therefore, a modulated buck regulator module was designed. The modulated buck regulator module supplies power to the display screen under the control of the control circuit.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a circuit diagram of the power supply processing circuit in this utility model.

[0018] Figure 2 This is the circuit diagram for the camera driver circuit.

[0019] Figure 3 This is the circuit diagram for the lamp driver circuit. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 3As shown, this utility model discloses a control circuit for a supplementary lighting camera, including: a power supply battery, a power processing circuit, a control circuit, a camera driving circuit, a camera, a lamp driving circuit, and a supplementary lighting lamp; the positive terminal of the power supply battery is connected to the input terminal of the power processing circuit, and the power supply battery outputs a first voltage value; the power processing circuit includes: a direct buck regulator module and a regulated buck regulator module, the input terminal of the direct buck regulator module and the input terminal of the regulated buck regulator module are connected to form the input terminal of the power processing circuit, the direct buck regulator module reduces the first voltage value (9V) to a second voltage value (3.3V), the direct buck regulator module reduces the first voltage value to a third voltage value (5V), and the output terminal of the direct buck regulator module is the power processing circuit. The circuit's first output terminal is VDD. The output terminal of the adjustable step-down regulator module is the second output terminal of the power processing circuit, VCC. The control terminal of the adjustable step-down regulator module is connected to the first output terminal of the control module. The first output terminal of the power processing circuit, VDD, is connected to the input terminal of the camera driver circuit and the power supply terminal of the control module. The first output terminal of the camera driver circuit, 2V8, is connected to the positive terminal of the camera, and the negative terminal of the camera is grounded. The control terminal of the camera driver circuit is connected to the second output terminal of the control module. The first output terminal of the camera driver circuit, 2V8, powers the fill light D2 through the lamp driver circuit. The control terminal of the lamp driver circuit is connected to the third output terminal of the control module. The control module has a communication connection to the display screen. The second output terminal of the power processing circuit, VCC, powers the display screen. The camera has a communication connection with the control module.

[0022] In this application, the power processing circuit also includes a voltage detection module. The input terminal of the voltage detection module is connected to the input terminal of the direct buck regulator module, and the output terminal of the voltage detection module is connected to the first input terminal of the control module. By setting up the voltage detection module, it detects whether the power supply battery has voltage output.

[0023] Preferably, the second output terminal of the camera driving circuit is connected to the second input terminal of the control module.

[0024] In this application, the camera driving circuit includes: resistors R1, R2, R3, R4, and R5, a PMOS transistor Q1, and an NPN transistor Q2. The first terminal of resistor R1 and the source of PMOS transistor Q1 are connected to form the input terminal of the camera driving circuit. The drain of PMOS transistor Q1 is the first output terminal 2V8 of the camera driving circuit. The gate of PMOS transistor Q1 is connected to the second terminal of resistor R1, the first terminal of resistor R3, and the first terminal of resistor R2. The second terminal of resistor R2 is the second output terminal of the camera driving circuit. The second terminal of resistor R3 is connected to the collector of NPN transistor Q2. The emitter of NPN transistor Q2 and the first terminal of resistor R4 are grounded. The second terminal of resistor R4 and the base of NPN transistor Q2 are connected to the first terminal of resistor R5. The second terminal of resistor R5 is the control terminal of the camera driving circuit. When the base of NPN transistor Q2 is high, the gate of PMOS transistor Q1 is high, and PMOS transistor Q1 is off. At this time, the first output terminal 2V8 of the camera driver circuit does not output voltage, while the second output terminal outputs a high level, proving that NPN transistor Q2 is closed. When the base of NPN transistor Q2 is low, the gate of PMOS transistor Q1 is low, and PMOS transistor Q1 is closed. At this time, the first output terminal 2V8 of the camera driver circuit outputs voltage, while the second output terminal outputs a low level, proving that NPN transistor Q2 is off. Therefore, by detecting the second output terminal of the camera driver circuit, the normal operation of NPN transistor Q2 can be detected.

[0025] The lamp driver circuit includes resistors R6, R7, and R8, as well as an NPN transistor Q3. The output of the camera driver circuit is connected to the anode of the fill light D2. The cathode of the fill light D2 is connected to the collector of the NPN transistor Q3 through resistor R6. The emitter of the NPN transistor Q3 and the first terminal of resistor R8 are grounded. The base of the NPN transistor Q3 and the second terminal of resistor R8 are connected to the first terminal of resistor R7. The second terminal of resistor R7 is the control terminal of the lamp driver circuit. Resistors R6, R7, and R8 serve a voltage stabilizing function.

[0026] In this application, the direct buck regulator module includes: diode D1, capacitors C1, C2, and C3, and a buck regulator chip U1. The anode of diode D1 is the input terminal of the direct buck regulator module, and the cathode of diode D1 is connected to the positive terminal of capacitor C1 and the IN pin of the buck regulator chip U1. The OUT pin of the buck regulator chip U1 is connected to the positive terminals of capacitors C1, C2, and C3, and is the output terminal of the direct buck regulator module. The GND pin of the buck regulator chip U1, the negative terminals of capacitors C1, C2, and C3 are all grounded. Diode D1 limits reverse current. Capacitors C1, C2, and C all serve a voltage stabilizing function. The buck regulator chip U1 is model ME6214A28M3G.

[0027] In this application, the adjustable buck regulator module includes: inductor L1, buck regulator chip U2, resistor R9, resistor R10, capacitor C4, capacitor C5, capacitor C6, and capacitor C7. The first end of inductor L1 is connected to the VIN pin of buck regulator chip U2 to form the input terminal of the adjustable buck regulator module. The second end of inductor L1 is connected to the SW pin of buck regulator chip U2. The GND pin of buck regulator chip U2 is grounded. The OUT pin of buck regulator chip U2 is connected to the first end of resistor R9, the positive terminals of capacitors C4, C5, C6, and C7. The FB pin of buck regulator chip U2 is connected to the second end of resistor R9 and the first end of resistor R10. The second end of resistor R10, the negative terminals of capacitors C4, C5, C6, and C7 are all grounded. The OUT pin of buck regulator chip U2 is the output terminal of the adjustable buck regulator module. Adjusting the values ​​of resistors R9 and R10 allows for adjustment of the output voltage of the adjustable buck regulator module. Capacitors C4, C5, C6, and C7 all serve a voltage stabilizing function. The buck regulator chip U2 is an SGM66024 model.

[0028] Preferably, the voltage detection module includes: resistor R11, resistor R12 and capacitor C8. The first end of resistor R11 is connected to the input terminal of the adjustable step-down regulator module, the second end of resistor R11 is connected to the first end of resistor R12 and the positive terminal of capacitor C8, and the second end of resistor R12 and the negative terminal of capacitor C8 are both grounded.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A control circuit for a camera based on a supplementary light, characterized in that, include: Power supply battery, power processing circuit, control circuit, camera drive circuit, camera, lamp drive circuit and fill light; The positive terminal of the power supply battery is connected to the input terminal of the power processing circuit, and the power supply battery outputs the first voltage value; The power processing circuit includes: a direct buck regulator module and a regulated buck regulator module. The input terminals of the direct buck regulator module and the regulated buck regulator module are connected to form the input terminal of the power processing circuit. The direct buck regulator module reduces the first voltage value to a second voltage value and then reduces the first voltage value to a third voltage value. The output terminal of the direct buck regulator module is the first output terminal of the power processing circuit, and the output terminal of the regulated buck regulator module is the second output terminal of the power processing circuit. The control terminal of the regulated buck regulator module is connected to the first output terminal of the control module. The first output terminal of the power supply processing circuit is connected to the input terminal of the camera driving circuit and the power supply terminal of the control module. The first output terminal of the camera driving circuit is connected to the positive terminal of the camera, the negative terminal of the camera is grounded, and the control terminal of the camera driving circuit is connected to the second output terminal of the control module. The first output of the camera driver circuit supplies power to the fill light through the lamp driver circuit, and the control terminal of the lamp driver circuit is connected to the third output of the control module. The control module is connected to a display screen, the second output of the power processing circuit supplies power to the display screen, and the camera is connected to the control module.

2. The control circuit for a camera based on a fill light as described in claim 1, characterized in that, The power processing circuit also includes a voltage detection module. The input terminal of the voltage detection module is connected to the input terminal of the direct buck regulator module, and the output terminal of the voltage detection module is connected to the first input terminal of the control module.

3. The control circuit based on a supplementary light type camera according to claim 2, characterized in that, The second output terminal of the camera driver circuit is connected to the second input terminal of the control module.

4. The control circuit based on a supplementary light type camera according to claim 3, characterized in that, The camera driving circuit includes: resistors R1, R2, R3, R4, and R5, a PMOS transistor Q1, and an NPN transistor Q2. The first terminal of resistor R1 and the source of PMOS transistor Q1 are connected to form the input terminal of the camera driving circuit. The drain of PMOS transistor Q1 is the first output terminal of the camera driving circuit. The gate of PMOS transistor Q1 is connected to the second terminal of resistor R1, the first terminal of resistor R3, and the first terminal of resistor R2. The second terminal of resistor R2 is the second output terminal of the camera driving circuit. The second terminal of resistor R3 is connected to the collector of NPN transistor Q2. The emitter of NPN transistor Q2 and the first terminal of resistor R4 are grounded. The second terminal of resistor R4 and the base of NPN transistor Q2 are connected to the first terminal of resistor R5. The second terminal of resistor R5 is the control terminal of the camera driving circuit.

5. The control circuit based on a supplementary light type camera according to claim 1, characterized in that, The lamp driver circuit includes resistors R6, R7, and R8, as well as an NPN transistor Q3. The output of the camera driver circuit is connected to the anode of the fill light, and the cathode of the fill light is connected to the collector of the NPN transistor Q3 through resistor R6. The emitter of the NPN transistor Q3 and the first terminal of resistor R8 are grounded. The base of the NPN transistor Q3 and the second terminal of resistor R8 are connected to the first terminal of resistor R7. The second terminal of resistor R7 is the control terminal of the lamp driver circuit.

6. The control circuit based on a supplementary light type camera according to claim 1, characterized in that, The direct buck regulator module includes: diode D1, capacitors C1, C2, and C3, and buck regulator chip U1. The anode of diode D1 is the input terminal of the direct buck regulator module, and the cathode of diode D1 is connected to the positive terminal of capacitor C1 and the IN pin of buck regulator chip U1. The OUT pin of buck regulator chip U1 is connected to the positive terminals of capacitors C1, C2, and C3. The OUT pin of buck regulator chip U1 is the output terminal of the direct buck regulator module. The GND pin of buck regulator chip U1, the negative terminals of capacitors C1, C2, and C3 are all grounded.

7. The control circuit based on a supplementary light type camera according to claim 1, characterized in that, The adjustable buck regulator module includes: inductor L1, buck regulator chip U2, resistor R9, resistor R10, capacitor C4, capacitor C5, capacitor C6, and capacitor C7. The first end of inductor L1 is connected to the VIN pin of buck regulator chip U2 to form the input terminal of the adjustable buck regulator module. The second end of inductor L1 is connected to the SW pin of buck regulator chip U2. The GND pin of buck regulator chip U2 is grounded. The OUT pin of buck regulator chip U2 is connected to the first end of resistor R9, the positive terminals of capacitors C4, C5, C6, and C7. The FB pin of buck regulator chip U2 is connected to the second end of resistor R9 and the first end of resistor R10. The second end of resistor R10, the negative terminals of capacitors C4, C5, C6, and C7 are all grounded. The OUT pin of buck regulator chip U2 is the output terminal of the adjustable buck regulator module.

8. The control circuit based on a supplementary light type camera according to claim 2, characterized in that, The voltage detection module includes: resistor R11, resistor R12 and capacitor C8. The first end of resistor R11 is connected to the input terminal of the adjustable step-down regulator module. The second end of resistor R11 is connected to the first end of resistor R12 and the positive terminal of capacitor C8. The second end of resistor R12 and the negative terminal of capacitor C8 are both grounded.

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