Monitoring network camera power supply switching circuit

Abstract

The utility model discloses a power supply switching circuit for a monitoring network camera. The power supply switching circuit comprises a network camera. The backward voltage circuit comprises a diode D9 and a diode D10; the cathode of the diode D9 is electrically connected with the cathode of the diode D10 and is connected with the input end of the network camera; the input end of the power supply circuit is connected with 220V commercial power, and the power supply circuit converts the 220V commercial power into 5V commercial power and is electrically connected with the anode of the diode D9; the input end of the power supply management circuit is electrically connected with the output end of the power supply circuit; the standby power supply is a battery pack; the positive electrode of the battery pack is electrically connected with the input end of the power management circuit and the positive electrode of the diode D10, and the negative electrode of the battery pack is grounded.

Description

Technical Field

[0001] The utility model relates to the field of power switching circuits for monitoring network cameras, in particular to a power switching circuit for monitoring network cameras. Background Art

[0002] Surveillance network cameras are a type of device widely used in security monitoring, remote monitoring and other scenarios. They transmit video and audio signals through the network to achieve real-time monitoring and recording of the monitored area. Currently, most surveillance network cameras are directly powered by AC power. Therefore, when the AC power is suddenly cut off, the surveillance network camera will also stop receiving power, causing the surveillance network camera to stop working and unable to perform security monitoring.

[0003] Therefore, the existing technology has defects and needs to be improved. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a power switching circuit for a monitoring network camera, which provides a backup power supply so that when the mains power is suddenly cut off, the backup power supply can supply power to the monitoring network camera.

[0005] The technical solution of the utility model is as follows: A power switching circuit for a monitoring network camera, comprising:

[0006] webcam;

[0007] A reverse voltage circuit, comprising a diode D9 and a diode D10; a cathode of the diode D9 is electrically connected to a cathode of the diode D10 and is connected to an input terminal of the network camera;

[0008] A power supply circuit, wherein the input end of the power supply circuit is connected to a 220V mains power supply, and the power supply circuit converts the 220V mains power supply into 5V and electrically connects it to the anode of the diode D9;

[0009] a power management circuit, wherein an input terminal of the power management circuit is electrically connected to an output terminal of the power circuit;

[0010] The backup power supply is configured as a battery pack; the positive electrode of the battery pack is electrically connected to the input terminal of the power management circuit and the anode of the diode D10, and the negative electrode of the battery pack is grounded.

[0011] Applied to the above technical solution, the power supply circuit includes a power supply module and a first switching circuit. The input end of the power supply module is connected to the 220V AC power supply. The power supply module is used to convert the 220V AC power supply into a 5V output. The first switching circuit is arranged at the output end of the power supply module for controlling the output of the 5V voltage.

[0012] Applied to each of the above technical solutions, the first switching circuit includes a circuit consisting of a switch S4, a filter capacitor C15, a filter capacitor C12, an LED indicator D1, and a resistor R7; the input end of the switch S4 is electrically connected to one input end of the power module; the output end of the switch S4 is electrically connected to the other input end of the power module via the LED indicator D1 and the resistor R7, and is grounded; the filter capacitor C15 and the filter capacitor C12 are connected in parallel, and a common end of the parallel connection is electrically connected to the output end of the switch S4, and the other common point of the parallel connection between the filter capacitor C15 and the filter capacitor C12 is grounded.

[0013] Applied to each of the above technical solutions, the output end of the switch S4 is provided with a 5V connection port.

[0014] Applied to the above technical solutions, the power module model is set to HLK-PM01.

[0015] Applied to each of the above technical solutions, the power management circuit includes a power management chip MP26028EQ and a peripheral circuit of the power management chip MP26028EQ; pin 1 of the power management chip MP26028EQ is electrically connected to the 5V connection port, pin 6 of the power management chip MP26028EQ is grounded, and pin 10 of the power management chip MP26028EQ is electrically connected to the positive pole of the battery pack.

[0016] Applied to each of the above technical solutions, the power switching circuit also includes a second switching circuit, which includes a field effect transistor Q4, a resistor R49, a resistor R155, a resistor R139, and a resistor R140; the drain of the field effect transistor Q4 is electrically connected to the positive electrode of the battery pack, and the gate of the field effect transistor Q4 is electrically connected to the 5V connection port, one end of the resistor R155, and one end of the resistor R139 through the resistor R49, the other end of the resistor R155 is grounded, the other end of the resistor R139 is electrically connected to one end of the resistor R140 and pin 5 of the power management chip MP26028EQ, and the other end of the resistor R140 is grounded.

[0017] Applied to the above technical solutions, the voltage capacity of the battery pack is set to 5V.

[0018] The beneficial effects of the present invention are as follows: the present invention converts 220V mains electricity into 5V voltage through the power supply circuit and outputs it to the network camera, and prevents voltage reverse through the diode D9, and charges the battery pack through the power management circuit. After the battery pack is charged or fully charged, due to the unidirectional conduction performance of the diode D10, the cathode voltage of the diode D10 is greater than the voltage of the battery pack or equal to its voltage of 5V, thereby not supplying voltage to the network camera;

[0019] When the 220V mains power is suddenly cut off, the battery pack discharges and the diode D10 is turned on, and the battery pack is switched to power the network camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the power supply circuit of the utility model;

[0021] Figure 2 This is a circuit schematic diagram of the reverse voltage circuit, power management circuit, backup power supply, and second open circuit of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 、 Figure 2 As shown: This embodiment provides a monitoring network camera power switching circuit, network camera;

[0024] A reverse voltage circuit, comprising a diode D9 and a diode D10; a cathode of the diode D9 is electrically connected to a cathode of the diode D10 and is connected to an input terminal of the network camera;

[0025] A power supply circuit, wherein the input end of the power supply circuit is connected to a 220V mains power supply, and the power supply circuit converts the 220V mains power supply into 5V and electrically connects it to the anode of the diode D9;

[0026] a power management circuit, wherein an input terminal of the power management circuit is electrically connected to an output terminal of the power circuit;

[0027] The backup power supply is configured as a battery pack; the positive electrode of the battery pack is electrically connected to the input terminal of the power management circuit and the anode of the diode D10, and the negative electrode of the battery pack is grounded.

[0028] In this embodiment, if Figure 1As shown, the power supply circuit includes a power supply module and a first switching circuit. The input end of the power supply module is connected to 220V AC power. The power supply module is used to convert the 220V AC power into 5V output. The first switching circuit is provided at the output end of the power supply module for controlling the output of the 5V voltage; the first switching circuit includes a circuit consisting of a switch S4, a filter capacitor C15, a filter capacitor C12, an LED indicator D1, and a resistor R7; the input end of the switch S4 is electrically connected to an input end of the power supply module; the output end of the switch S4 is electrically connected to the other input end of the power supply module through the LED indicator D1 and the resistor R7, and is grounded; the filter capacitor C15 and the filter capacitor C12 are connected in parallel, and a common end of the parallel connection is electrically connected to the output end of the switch S4, and the other common point of the parallel connection of the filter capacitor C15 and the filter capacitor C12 is grounded; the output end of the switch S4 is provided with a 5V connection port; the power supply module model is set to HLK-PM01.

[0029] In this embodiment, if Figure 2 As shown, the power management circuit includes a power management chip MP26028EQ and a peripheral circuit of the power management chip MP26028EQ; pin 1 of the power management chip MP26028EQ is electrically connected to the 5V connection port, pin 6 of the power management chip MP26028EQ is grounded, and pin 10 of the power management chip MP26028EQ is electrically connected to the positive electrode of the battery pack;

[0030] Among them, when the power supply is 220V, the power management chip MP26028EQ supplies the voltage connected to the 5V connection port to the battery pack for charging. At this time, the diode D10 is cut off and the battery pack does not power the network camera. The voltage connected to the 5V connection port forms a power supply circuit through the diode D9, the network camera, and the resistor R155.

[0031] In this embodiment, if Figure 2 As shown, the power switching circuit further includes a second switch circuit, which includes a field effect transistor Q4, a resistor R49, a resistor R155, a resistor R139, and a resistor R140; the drain of the field effect transistor Q4 is electrically connected to the positive electrode of the battery pack, and the gate of the field effect transistor Q4 is electrically connected to the 5V connection port, one end of the resistor R155, and one end of the resistor R139 through the resistor R49, the other end of the resistor R155 is grounded, the other end of the resistor R139 is electrically connected to one end of the resistor R140 and pin 5 of the power management chip MP26028EQ, and the other end of the resistor R140 is grounded; the voltage capacity of the battery pack is set to 5V;

[0032] Among them, when the 220V city power is cut off, that is, when the 5V connection port is instantly powered off, the battery pack supplies power, the field effect transistor Q4 is turned on, and the battery pack forms a circuit through the diode D10, the field effect transistor, the network camera, the resistor R49, and the resistor R155.

[0033] The working principle of this utility model is:

[0034] (1) The utility model converts 220V mains electricity into 5V voltage and outputs it to the network camera through the power circuit, and prevents voltage reverse through the diode D9, and charges the battery pack through the power management circuit;

[0035] (2) After the battery pack is charged or fully charged, due to the unidirectional conduction performance of the diode D10, the cathode voltage of the diode D10 is greater than the voltage of the battery pack or equal to its voltage of 5V, thereby not providing voltage to the network camera;

[0036] (3) When the 220V mains power is suddenly cut off, the battery pack discharges and the diode D10 turns on, and the battery pack is switched to power the network camera.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A power switching circuit for a monitoring network camera, characterized in that: include: webcam; A reverse voltage circuit, comprising a diode D9 and a diode D10; a cathode of the diode D9 is electrically connected to a cathode of the diode D10 and is connected to an input terminal of the network camera; A power supply circuit, wherein the input end of the power supply circuit is connected to a 220V mains power supply, and the power supply circuit converts the 220V mains power supply into 5V and electrically connects it to the anode of the diode D9; a power management circuit, wherein an input terminal of the power management circuit is electrically connected to an output terminal of the power circuit; The backup power supply is configured as a battery pack; the positive electrode of the battery pack is electrically connected to the input terminal of the power management circuit and the anode of the diode D10, and the negative electrode of the battery pack is grounded.

2. The power switching circuit for a surveillance network camera according to claim 1, wherein: The power supply circuit includes a power supply module and a first switching circuit. The input end of the power supply module is connected to 220V AC power. The power supply module is used to convert the 220V AC power into 5V output. The first switching circuit is arranged at the output end of the power supply module to control the output of the 5V voltage.

3. The power switching circuit for a surveillance network camera according to claim 2, wherein: The first switch circuit includes a circuit consisting of a switch S4, a filter capacitor C15, a filter capacitor C12, an LED indicator D1, and a resistor R7; the input end of the switch S4 is electrically connected to one input end of the power module; the output end of the switch S4 is electrically connected to the other input end of the power module via the LED indicator D1 and the resistor R7, and is grounded; the filter capacitor C15 and the filter capacitor C12 are connected in parallel, and a common end of the parallel connection is electrically connected to the output end of the switch S4, and the other common point of the parallel connection between the filter capacitor C15 and the filter capacitor C12 is grounded.

4. The power switching circuit for a surveillance network camera according to claim 3, wherein: The output end of the switch S4 is provided with a 5V connection port.

5. The power switching circuit for a surveillance network camera according to claim 4, wherein: The power module model is set to HLK-PM01.

6. The power switching circuit for a surveillance network camera according to claim 4, wherein: The power management circuit includes a power management chip MP26028EQ and a peripheral circuit of the power management chip MP26028EQ; pin 1 of the power management chip MP26028EQ is electrically connected to a 5V connection port, pin 6 of the power management chip MP26028EQ is grounded, and pin 10 of the power management chip MP26028EQ is electrically connected to the positive pole of the battery pack.

7. The power switching circuit for a surveillance network camera according to claim 6, wherein: The power switching circuit also includes a second switching circuit, which includes a field effect transistor Q4, a resistor R49, a resistor R155, a resistor R139, and a resistor R140; the drain of the field effect transistor Q4 is electrically connected to the positive electrode of the battery pack, and the gate of the field effect transistor Q4 is electrically connected to the 5V connection port, one end of the resistor R155, and one end of the resistor R139 through the resistor R49, the other end of the resistor R155 is grounded, the other end of the resistor R139 is electrically connected to one end of the resistor R140 and pin 5 of the power management chip MP26028EQ, and the other end of the resistor R140 is grounded.

8. The power switching circuit for a surveillance network camera according to claim 7, wherein: The battery pack voltage capacity is set to 5V.

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