Socket load access detection circuit
By using NPN type transistors and photocouplers in the socket load detection circuit to detect the load insertion status, the problem of inaccurately determining the charger load insertion in the prior art is solved, and accurate judgment of load insertion and removal and power safety control are achieved. .
Patent Information
- Application Number
- CN202411389779.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-01-03
AI Technical Summary
The prior art cannot accurately determine whether the charger load is inserted into the socket, resulting in the problem of not charging fully or incorrect power outage in operation, especially when facing multiple charger types, which will cause inconvenience to users.
A socket load access detection circuit is designed, using NPN transistors and photocouplers to sense the load state by detecting infrared light emitted by the tube when load is inserted, so as to achieve accurate judgment of load insertion and removal, and when necessary Turn off the power.
The hardware detection solution avoids the inaccuracy of load power judgment, ensures power safety, shuts down the power in a timely manner, and improves the power safety and service life of the equipment.
Smart Images
Figure CN119247213A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of socket loads, and in particular to a socket load access detection circuit. Background Art
[0002] To adapt to the home and commercial charging piles on the market, during the charging process, it is impossible to determine whether the battery is full or the plug is removed, which leads to many problems in operation;
[0003] Defects of the existing technology:
[0004] 1) Traditional centralized equipment relies on power to detect the status of the plug, but there are many types of chargers on the market, which results in users being unable to fully charge and causing many charging operation problems, bringing great inconvenience to users;
[0005] 2) The existing method solves a major problem of operational charging or home charging, and will not increase additional costs on the original basis. It is the optimal form in the charging field and smart socket field. Summary of the invention
[0006] The object of the present invention is to provide a socket load access detection circuit to solve the problems raised in the above background technology.
[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a socket load access detection circuit, comprising a resistor R57 and a resistor R59, one end of the resistor R57 and one end of the resistor R56 are both connected to the base 1 of the NPN transistor Q11, the emitter 2 of the NPN transistor Q11 is connected to the other end of the resistor R56 and one end of the capacitor C40, the collector 3 of the NPN transistor Q11 is connected to the 2 interface of the photoelectric coupler U21, the 1 interface of the photoelectric coupler U21 is connected to one end of the resistor R49, the 4 interface of the photoelectric coupler U21 is connected to one end of the resistor R50, the other end of the capacitor C40 and the input interface 3 of the AC power supply U27, one end of the resistor R59 is connected to the base 1 of the NPN transistor Q12, the emitter 2 of the NPN transistor Q12 is connected to the collector 3 of the NPN transistor Q11 The emitter 2 is connected to the other end of the resistor R58 and one end of the capacitor C41, the collector 3 of the NPN transistor Q12 is connected to the 2 interface of the photoelectric coupler U26, the 1 interface of the photoelectric coupler U26 is connected to one end of the resistor R51, the 4 interface of the photoelectric coupler U26 is connected to one end of the resistor R53, the other end of the capacitor C41 and the input interface 5 of the AC power supply U27, the output interface 1 of the AC power supply U27 is connected to one end of the resistor R60, the input interface 2 and the input interface 6 of the AC power supply U27 are both connected to one end of the resistor R55 and one end of the resistor R54, the output interface 7 of the AC power supply U27 is connected to one end of the resistor R61, and the other end of the resistor R54, the other end of the resistor R60 and the other end of the resistor R61 are all connected to one end of the capacitor C42.
[0008] Furthermore, the 3 interface of the photoelectric coupler U21 and the 3 interface of the photoelectric coupler U26 are both grounded.
[0009] Furthermore, the ground terminal 4 of the AC power source U27, the other end of the resistor R55 and the other end of the capacitor C42 are all grounded.
[0010] Further, the other end of the resistor R49, the other end of the resistor R50, the other end of the resistor R51, the other end of the resistor R53 and the 8 interface of the AC power supply U27 are all connected to the VCC3V8 terminal.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] Adding a hardware detection solution to detect the load structure can completely avoid the inaccuracy of judging whether the load has been removed by the load power; after the load is removed in the public area, the power supply is turned off in time, which greatly improves the safety of electricity use. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a circuit diagram of the present invention. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0015] See also Figure 1 The present invention provides a socket load access detection circuit, including a resistor R57 and a resistor R59, one end of the resistor R57 and one end of the resistor R56 are both connected to the base 1 of the NPN transistor Q11, the emitter 2 of the NPN transistor Q11 is connected to the other end of the resistor R56 and one end of the capacitor C40, the collector 3 of the NPN transistor Q11 is connected to the 2 interface of the photoelectric coupler U21, the 1 interface of the photoelectric coupler U21 is connected to one end of the resistor R49, the 4 interface of the photoelectric coupler U21 is connected to one end of the resistor R50, the other end of the capacitor C40 and the input interface 3 of the AC power supply U27, one end of the resistor R59 is connected to the base 1 of the NPN transistor Q12, the emitter 2 of the NPN transistor Q12 is connected to the resistor The other end of R58 is connected to one end of capacitor C41, the collector 3 of NPN transistor Q12 is connected to interface 2 of photoelectric coupler U26, interface 1 of photoelectric coupler U26 is connected to one end of resistor R51, interface 4 of photoelectric coupler U26 is connected to one end of resistor R53, the other end of capacitor C41 and input interface 5 of AC power supply U27, output interface 1 of AC power supply U27 is connected to one end of resistor R60, input interface 2 and input interface 6 of AC power supply U27 are both connected to one end of resistor R55 and one end of resistor R54, output interface 7 of AC power supply U27 is connected to one end of resistor R61, and the other end of resistor R54, the other end of resistor R60 and the other end of resistor R61 are all connected to one end of capacitor C42.
[0016] Interface 3 of the photocoupler U21 and interface 3 of the photocoupler U26 are both grounded.
[0017] The ground terminal 4 of the AC power source U27, the other end of the resistor R55 and the other end of the capacitor C42 are all grounded.
[0018] The other end of resistor R49, the other end of resistor R50, the other end of resistor R51, the other end of resistor R53 and the 8 interface of AC power supply U27 are all connected to the VCC3V8 terminal.
[0019] This connector adds a light-absorbing mechanism to the socket safety door. When the load is inserted into the socket, the socket can block the infrared pair of tubes to transmit the optocoupler to sense the device socket. The circuit is isolated from the AC220V AC power supply. The transmitting pair of tubes is controlled by IO. When necessary, the pair of tubes is turned on for detection, which greatly increases the service life.
[0020] Add a load insertion detection function to prevent the device from not being powered on or accidentally powered off after the load is used or removed, and avoid the device's incorrect judgment of whether the load is connected in the original way.
[0021] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A socket load access detection circuit, comprising a resistor R57 and a resistor R59, characterized in that: One end of the resistor R57 and one end of the resistor R56 are both connected to the base 1 of the NPN transistor Q11, the emitter 2 of the NPN transistor Q11 is connected to the other end of the resistor R56 and one end of the capacitor C40, the collector 3 of the NPN transistor Q11 is connected to the 2 interface of the photoelectric coupler U21, the 1 interface of the photoelectric coupler U21 is connected to one end of the resistor R49, the 4 interface of the photoelectric coupler U21 is connected to one end of the resistor R50, the other end of the capacitor C40 and the input interface 3 of the AC power supply U27, one end of the resistor R59 is connected to the base 1 of the NPN transistor Q12, the emitter 2 of the NPN transistor Q12 is connected to the other end of the resistor R58 and one end of the capacitor C41 The collector 3 of the NPN transistor Q12 is connected to the interface 2 of the photoelectric coupler U26, the interface 1 of the photoelectric coupler U26 is connected to one end of the resistor R51, the interface 4 of the photoelectric coupler U26 is connected to one end of the resistor R53, the other end of the capacitor C41 and the input interface 5 of the AC power supply U27, the output interface 1 of the AC power supply U27 is connected to one end of the resistor R60, the input interface 2 and the input interface 6 of the AC power supply U27 are both connected to one end of the resistor R55 and one end of the resistor R54, the output interface 7 of the AC power supply U27 is connected to one end of the resistor R61, and the other end of the resistor R54, the other end of the resistor R60 and the other end of the resistor R61 are all connected to one end of the capacitor C42.
2. A socket load access detection circuit according to claim 1, characterized in that: The 3 interface of the photoelectric coupler U21 and the 3 interface of the photoelectric coupler U26 are both grounded.
3. A socket load access detection circuit according to claim 1, characterized in that: The ground terminal 4 of the AC power source U27, the other end of the resistor R55 and the other end of the capacitor C42 are all grounded.
4. A socket load access detection circuit according to claim 1, characterized in that: The other end of the resistor R49, the other end of the resistor R50, the other end of the resistor R51, the other end of the resistor R53 and the 8 interface of the AC power supply U27 are all connected to the VCC3V8 terminal.