Sensor capable of accurately controlling mixed leakage flow alarm
By introducing the conversion, separation and identification module of the microcontroller device into the sensor, the precise identification and alarm of AC leakage current and DC leakage current is achieved, and the problem of uncertainty in existing sensors is solved in complex environments and the safety is improved.
Patent Information
- Application Number
- CN202421911630.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-08
AI Technical Summary
When existing sensors occur simultaneously and do not exceed the standard, it is difficult to accurately identify and alarm, and there is identification uncertainty and cannot effectively protect personal safety.
A sensor that accurately controls the alarm of mixed leakage current, and through the conversion module, separation module, identification module and alarm control module in the microcontroller device, the separation and identification of AC leakage current and DC leakage current are realized. The proportional addition unit is used to determine whether the mixed leakage current exceeds the limit, and when necessary, the shutdown is controlled to be powered off.
It improves the accuracy of the sensor's identification alarm under complex leakage conditions, and can more effectively protect personal safety in complex power environments.
Smart Images
Figure CN223078458U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a sensor, in particular to a sensor for accurately controlling hybrid leakage current alarm. Background Art
[0002] As an electrical device for protecting personal safety, a leakage current sensor can issue an alarm signal to control the power cut-off when the leakage current exceeds the safety standard or endangers life safety, so as to avoid personal injury accidents, and becomes an indispensable device in the power supply and distribution system.
[0003] Due to the increasing complexity of the power supply and distribution system, there are more and more systems with both AC leakage current and DC leakage current, and the fluxgate leakage current sensor that can detect both AC leakage current and DC leakage current emerges as the times require. When the AC leakage current and DC leakage current occur separately and exceed the standard, the existing sensors can accurately act; when the AC leakage current and DC leakage current occur simultaneously and one signal has exceeded the standard, the existing sensors can accurately act; but there is uncertainty in how to identify and alarm when the AC leakage current and DC leakage current occur simultaneously and both signals do not exceed the standard. Content of the Utility Model
[0004] In order to solve the deficiencies of the above technologies, the utility model provides a sensor for accurately controlling hybrid leakage current alarm.
[0005] In order to solve the above technical problems, the technical scheme adopted by the utility model is a sensor for accurately controlling hybrid leakage current alarm, which includes a sensor body. The sensor body includes a cover body, a wire coil, a circuit board and a bottom shell; the bottom shell is U-shaped, a base is fixedly arranged inside the bottom shell, and a circuit board is installed outside the base to set up circuits; a wire coil is arranged at the upper end of the circuit board, the wire coil is installed outside the base, and an iron core is arranged inside the wire coil; both the wire coil and the circuit board are installed inside the bottom shell, and the upper end of the bottom shell is plugged with a cover body to fix the wire coil and the circuit board;
[0006] A single-chip microcomputer device is arranged on the circuit board. The single-chip microcomputer device includes a conversion module, a separation module, an identification module and an alarm control module;
[0007] The conversion module is used for converting analog signals into digital signals, and the conversion module is connected to the separation module;
[0008] The separation module is used for separating AC leakage current and DC leakage current, and the separation module is connected to the identification module;
[0009] The identification module is used for performing DC leakage current overlimit identification, AC leakage current overlimit identification and hybrid leakage current overlimit identification, and judging whether the alarm limit is reached; a proportional addition unit is arranged inside the identification module to identify whether the hybrid leakage current exceeds the limit; the identification module is connected to the alarm control module;
[0010] The alarm control module is used for alarming and controlling the power cut by switching off the main switch.
[0011] Further, a plurality of buckles are fixedly arranged at equal intervals on the side wall of the cover body to facilitate the installation and fixation with the bottom shell.
[0012] Further, a bobbin support is arranged at the upper end of the bobbin to limit the bobbin.
[0013] Further, a plurality of limiting blocks are symmetrically arranged along the circumference at the lower end of the bobbin support to support the circuit board.
[0014] Further, a plurality of lead rods are symmetrically arranged along the circumference on the outer side of the bobbin support, and a plurality of jacks are opened on the circuit board to insert and weld the lead rods to connect the bobbin with the circuit.
[0015] Further, the lead rods and the jacks are arranged in one-to-one correspondence.
[0016] Further, a plurality of fixing blocks are fixedly arranged on the inner side wall of the bottom shell to facilitate the placement of the circuit board.
[0017] Further, a plug board is fixedly arranged at the opening of the bottom shell, and a plurality of placement grooves are opened at the upper end of the plug board to place the sensor pins.
[0018] Further, a protection board is fixedly arranged at the front end of the cover body to protect the bobbin and the circuit board inside the sensor body.
[0019] Further, a clamping groove is fixedly arranged on the upper end surface of the plug board to cooperate with the protection board for fastening and connecting the cover body and the bottom shell.
[0020] The utility model discloses a sensor for accurately controlling hybrid leakage current alarm. By connecting the circuit of the sensor body to a single-chip microcomputer device, a proportional addition unit is arranged in the recognition module of the single-chip microcomputer device. The alternating current leakage current signal and the direct current leakage current signal detected by the sensor body pass through the proportional addition unit to judge whether the hybrid leakage current formed by the alternating current leakage current and the direct current leakage current exceeds the limit, which improves the accuracy of the sensor in identifying and alarming under complex leakage current conditions and can more effectively protect personal safety in a complex power consumption environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic structural diagram of the sensor body in the utility model.
[0022] Figure 2 It is an exploded view of the sensor body in the utility model.
[0023] Figure 3 It is Figure 2 The enlarged view at A in
[0024] Figure 4 It is Figure 2Enlarged view at B in the [device].
[0025] Figure 5 It is a schematic structural diagram of the bottom shell in the sensor body.
[0026] In the figure: 1. Cover body; 2. Coil package support; 3. Coil package; 4. Circuit board; 5. Bottom shell; 6. Protection board; 7. Jack; 8. Limit block; 9. Buckle; 10. Lead rod; 11. Fixed block; 12. Base; 13. Insertion board. Specific embodiments
[0027] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] A sensor for precisely controlling hybrid leakage current alarm, including a sensor body, the sensor body includes a cover body 1, a coil package 3, a circuit board 4 and a bottom shell 5; the bottom shell 5 is U-shaped, and a base 12 is fixedly arranged inside the bottom shell 5, and a circuit board 4 is installed outside the base 12 to set circuits; a coil package 3 is arranged at the upper end of the circuit board 4, the coil package 3 is installed outside the base 12, and an iron core is arranged inside the coil package 3; both the coil package 3 and the circuit board 4 are installed inside the bottom shell 5, and a cover body 1 is inserted at the upper end of the bottom shell 5 to fix the coil package 3 and the circuit board 4;
[0029] A single-chip microcomputer device is arranged on the circuit board 4, and the single-chip microcomputer device includes a conversion module, a separation module, an identification module and an alarm control module;
[0030] The conversion module is used to convert analog signals into digital signals, and the conversion module is connected to the separation module;
[0031] The separation module is used to separate AC leakage current and DC leakage current, and the separation module is connected to the identification module;
[0032] The identification module is used to perform DC leakage current overlimit identification, AC leakage current overlimit identification and hybrid leakage current overlimit identification, and judge whether the alarm limit is reached; a proportional addition unit is arranged inside the identification module to identify whether the hybrid leakage current is overlimit; the identification module is connected to the alarm control module;
[0033] The alarm control module is used for alarming and controlling the power cut-off of the switch.
[0034] Specifically, a number of buckles 9 are fixedly arranged at equal intervals on the side wall of the cover body 1 for facilitating the installation and fixation with the bottom shell 5. A bobbin support 2 is arranged at the upper end of the bobbin 3 for limiting the bobbin 3. A number of limiting blocks 8 are symmetrically arranged along the circumference at the lower end of the bobbin support 2 to support the circuit board 4. A number of lead rods 10 are symmetrically arranged along the circumference on the outside of the bobbin support 2, and a number of jacks 7 are provided on the circuit board 4 for inserting and soldering the lead rods 10 to connect the bobbin 3 with the circuit. The lead rods 10 and the jacks 7 are arranged in one-to-one correspondence. A number of fixing blocks 11 are fixedly arranged on the inner side wall of the bottom shell 5 for facilitating the placement of the circuit board 4. An insertion plate 13 is fixedly arranged at the opening of the bottom shell 5, and a number of placement grooves are provided at the upper end of the insertion plate 13 for placing the sensor pins. A protection plate 6 is fixedly arranged at the front end of the cover body 1 to protect the bobbin 3 and the circuit board 4 inside the sensor body. A clamping groove is fixedly arranged on the upper end surface of the insertion plate 13 to cooperate with the protection plate 6 for tightly connecting the cover body 1 and the bottom shell 5.
[0035] This embodiment provides a specific connection method and working process for a sensor for precisely controlling hybrid leakage current alarm; a sensor for precisely controlling hybrid leakage current alarm, including a sensor body; as Figure 1 shown in the structural schematic diagram of the sensor body in a sensor for precisely controlling hybrid leakage current alarm, the sensor body includes a cover body 1, a bobbin 3, a circuit board 4 and a bottom shell 5; as Figure 2 shown in the exploded view of the sensor body in a sensor for precisely controlling hybrid leakage current alarm, the bottom shell 5 is U-shaped, an insertion plate 13 is fixedly arranged at the opening of the bottom shell 5, and eight placement grooves are provided at the upper end of the insertion plate 13 for placing the sensor pins; a clamping groove is fixedly arranged on the upper end surface of the insertion plate 13 for tightly connecting the cover body 1 and the bottom shell 5;
[0036] A base 12 is fixedly arranged inside the bottom shell 5, and a circuit board 4 is installed outside the base 12 for arranging circuits; the bobbin 3 is arranged at the upper end of the circuit board 4, and the bobbin 3 is installed outside the base 12; a number of fixing blocks 11 are fixedly arranged on the inner side wall of the bottom shell 5, and the fixing blocks 11 are provided to form a gap between the circuit board 4 and the inside of the bottom shell 5 for facilitating the placement and fixation of the circuit board 4;
[0037] An iron core is arranged inside the bobbin 3; a bobbin support 2 is arranged at the upper end of the bobbin 3 for limiting the bobbin 3, and four limiting blocks 8 are symmetrically arranged along the circumference at the lower end of the bobbin support 2 to support the circuit board 4; as Figure 4 in Figure 2 as shown in the enlarged view at B in, four lead rods 10 are symmetrically arranged along the circumference on the outside of the bobbin support 2, and four jacks 7 are provided at the positions of the circuit board 4 opposite to the lead rods 10 for inserting the lead rods 10 to fix the bobbin 3 and connect with the circuit signal, and the lead rods 10 and the jacks 7 are arranged in one-to-one correspondence; the bobbin 3 and the circuit board 4 are both installed inside the bottom shell 5;
[0038] As Figure 5 shown in the schematic structural diagram of the bottom shell of the sensor body Figure 5 , a cover body 1 is inserted into the upper end of the bottom shell 5 to fix the wire coil 3 and the circuit board 4, and a protection plate 6 is fixedly arranged at the front end of the cover body 1 to protect the wire coil 3 and the circuit board 4 inside the sensor body; As Figure 3 in Figure 2 the enlarged view at A in Figure 2 , four buckles 9 are symmetrically and fixedly arranged on the side wall of the cover body 1 to facilitate the installation and fixation with the bottom shell 5;
[0039] The base 12, the wire coil 3 and the wire coil support 2 are all cylindrical.
[0040] On the circuit board, the wire coil signal pins are connected to the single-chip microcomputer device. The single-chip microcomputer device includes a conversion module for converting analog signals into digital signals. The conversion module is connected to a separation module to separate the AC leakage current and the DC leakage current; The separation module is connected to an identification module for performing DC leakage current over-limit identification, AC leakage current over-limit identification, and mixed leakage current over-limit identification to judge whether the alarm limit is reached; The identification module is internally provided with a proportional addition unit to identify whether the mixed leakage current exceeds the limit; The identification module is connected to an alarm control module for alarming and controlling the power cut-off.
[0041] Working process: The live wire and the neutral wire of the power supply system to be detected for leakage current are all passed through the central hole of the leakage current sensor; Single-phase electricity and three-phase electricity are different. Single-phase electricity is one live wire and one neutral wire, and three-phase electricity is three live wires and one neutral wire; This embodiment adopts single-phase electricity;
[0042] The sensor body constantly detects the leakage current signal in the line to be detected and transmits the leakage current signal to the single-chip microcomputer device; First, through the conversion module, the analog signal presented by the leakage current signal is converted into a digital signal; Then, through the separation module, the digital signal representing the AC leakage current and the digital signal representing the DC leakage current in the digital signal are separated; Then, through the identification module, first judge whether the AC leakage current and the DC leakage current exceed the limit. If one of them reaches the alarm limit, the alarm control system will immediately give an alarm and control the power cut-off; If neither the AC leakage current nor the DC leakage current reaches the alarm limit, then judge whether the mixed leakage current exceeds the standard. The mixed leakage current is a mixed signal of the DC leakage current and the AC leakage current. The alarm standard for the AC leakage current is AC30mA, and the alarm standard for the DC leakage current is DC6mA. The digital signals of the AC leakage current and the DC leakage current are converted into percentages, and the percentages of the AC leakage current signal reaching the alarm standard and the percentage of the DC leakage current signal reaching the alarm standard are respectively obtained. Add the percentages of the two. If the sum of the proportions exceeds 100%, the alarm control system will give an alarm and cut off the power. The sensor body connected to the single-chip microcomputer device adds the intelligent analysis and processing of the DC leakage current signal and the AC leakage current signal, improves the accuracy of the sensor in identifying and alarming under complex leakage current conditions, and can more effectively protect personal safety in a complex power consumption environment.
[0043] The above embodiments are not limitations to the present utility model, nor is the present utility model limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model also fall within the protection scope of the present utility model.
Claims
1. A sensor for precisely controlling the alarm of mixed leakage current, comprising a sensor body, characterized in that: The sensor body includes a cover (1), a wire coil (3), a circuit board (4), and a bottom case (5); the bottom case (5) is U-shaped, and a base (12) is fixedly arranged inside the bottom case (5), and a circuit board (4) is installed outside the base (12) to set up circuits; a wire coil (3) is arranged at the upper end of the circuit board (4), the wire coil (3) is installed outside the base (12), and an iron core is arranged inside the wire coil (3); both the wire coil (3) and the circuit board (4) are installed inside the bottom case (5), and a cover (1) is inserted into the upper end of the bottom case (5) to fix the wire coil (3) and the circuit board (4); A single-chip microcomputer device is arranged on the circuit board (4), and the single-chip microcomputer device includes a conversion module, a separation module, an identification module, and an alarm control module; The conversion module is used to convert analog signals into digital signals, and the conversion module is connected to the separation module; The separation module is used to separate AC leakage current and DC leakage current, and the separation module is connected to the identification module; The identification module is used to perform DC leakage current overlimit identification, AC leakage current overlimit identification, and mixed leakage current overlimit identification to judge whether the alarm limit is reached; a proportional addition unit is arranged inside the identification module to identify whether the mixed leakage current is overlimit; the identification module is connected to the alarm control module; The alarm control module is used to give an alarm and control the switch to cut off the power supply.
2. The sensor for precisely controlling the hybrid leakage current alarm according to claim 1, wherein: A plurality of buckles (9) are fixedly arranged at equal intervals on the side wall of the cover (1) to facilitate the installation and fixation with the bottom case (5).
3. The sensor for precisely controlling the hybrid leakage current alarm according to claim 1, wherein: A wire coil support (2) is arranged at the upper end of the wire coil (3) to limit the wire coil (3).
4. The sensor for precisely controlling the hybrid leakage current alarm according to claim 3, wherein: A plurality of limit blocks (8) are symmetrically arranged along the circumference at the lower end of the wire coil support (2) to support the circuit board (4).
5. The sensor for precisely controlling the hybrid leakage current alarm according to claim 3, wherein: A plurality of lead rods (10) are symmetrically arranged along the circumference on the outside of the wire coil support (2), and a plurality of jacks (7) are opened on the circuit board (4) to insert and weld the lead rods (10) to connect the wire coil (3) to the circuit.
6. The sensor for precisely controlling the hybrid leakage current alarm according to claim 5, characterized in that: The lead rods (10) and the jacks (7) are arranged in one-to-one correspondence.
7. The sensor for accurately controlling the hybrid leakage current alarm according to claim 1, characterized in that: A plurality of fixing blocks (11) are fixedly arranged on the inner side wall of the bottom case (5) to facilitate the placement of the circuit board (4).
8. The sensor for precisely controlling the hybrid leakage current alarm according to claim 1, wherein: An insertion plate (13) is fixedly arranged at the opening of the bottom case (5), and a plurality of placement grooves are opened on the insertion plate (13) to place the sensor pins.
9. The sensor for precisely controlling the hybrid leakage current alarm according to claim 8, wherein: A protective plate (6) is fixedly arranged at the front end of the cover (1) to protect the wire coil (3) and the circuit board (4) inside the sensor body.
10. The sensor for accurately controlling the hybrid leakage current alarm according to claim 9, characterized in that: A card slot is fixedly arranged on the upper end surface of the insertion plate (13) to cooperate with the protective plate (6) for fastening the connection between the cover (1) and the bottom case (5).