Three-hole socket voltage rapid tester based on single-chip microcomputer

Abstract

The utility model discloses a three -hole socket voltage quick tester based on singlechip, including casing, test probe module and signal processing module, test probe module is connected with casing through detachable cable, and the handle is hinged on the plug and is equipped with three independently rotatable probes, and the operation safety and the adaptability to narrow space are greatly improved, and the casing is equipped with the indicator lamp group of text mark, display screen and start button, and the signal processing module is integrated in the casing, is used for handling probe signal and driving display, the utility model discloses through the probe structure of multidirectional adjustment has realized convenient test mode, and through the indication system of graphic and text combination, voltage value and fault type are directly shown, solve the problem that the existing detection instrument is unsafe, not intuitive, and poor adaptability, and have the portability and multifunctionality.

Description

Technical Field

[0001] This utility model relates to the technical field of socket testers, specifically a microcontroller-based rapid voltage tester for three-hole sockets. Background Technology

[0002] In daily electrical maintenance and household electrical safety, it is crucial to quickly and accurately detect the status of three-prong sockets, such as voltage value, whether the live and neutral wires are reversed, and whether the ground wire is effectively connected. Currently, common testing tools on the market include test pens, multimeters, and simple socket detectors. Test pens can only roughly determine the live wire and cannot provide quantitative information such as voltage value; multimeters, although powerful, are cumbersome to operate and inefficient; while common simple socket detectors usually only use a few LEDs to display the status, with limited and vague information, unable to display accurate voltage values, and even more difficult to determine the quality of the ground wire connection, which can easily lead to misjudgment. Utility Model Content

[0003] The purpose of this invention is to provide a microcontroller-based rapid voltage tester for three-hole sockets, which improves testing convenience and makes it easier for users to diagnose faults in three-hole sockets.

[0004] To achieve the above objectives, this utility model employs the following technical solution: a microcontroller-based rapid voltage tester for a three-hole socket, comprising a main module, a test probe module, and a signal processing module. The main module includes a housing, on which a display screen and a start button are mounted. The signal processing module is installed within the housing. The test probe module includes a plug with a hinged base fixed to it. A handle is hinged to the hinged base. The plug also has three rotatable rotating blocks, on which a first probe, a second probe, and a third probe are respectively fixed. The distribution of the first, second, and third probes conforms to the layout of the ground, neutral, and live wires of a three-hole plug. The test probe module is electrically connected to the signal processing module via a detachable cable.

[0005] By setting up an independent test probe module and using a detachable cable connection, the high-voltage testing section (probe) can be physically separated from the main display section, greatly improving operational convenience and avoiding the risk of accidentally touching a live probe during testing and observation. At the same time, the hinged handle and rotatable rotating block allow for multi-directional adjustment of the probe angle, flexibly adapting to various narrow or tricky socket environments, significantly improving the applicability and convenience of the tester.

[0006] In a further technical solution, the housing is also equipped with a grounding indicator light, a reverse connection indicator light, and a voltage abnormality indicator light.

[0007] By setting up three dedicated indicator lights for grounding, reverse connection, and voltage abnormality, complex electrical parameter states can be transformed into intuitive and eye-catching light signals, allowing users to quickly identify the basic fault types of the socket without having to interpret complex values, resulting in high human-computer interaction efficiency.

[0008] In a further technical solution, the housing is also provided with a first text marking area, a second text marking area and a third text marking area. The first text marking area corresponds to the grounding indicator light and is engraved with the words "not grounded". The second text marking area corresponds to the reverse connection indicator light and is engraved with the words "neutral and live connections reversed". The third text marking area corresponds to the voltage abnormality indicator light and is engraved with the words "not up to standard".

[0009] By engraving corresponding text labels next to the indicator lights, a clear graphic and textual indication system is formed, which effectively eliminates misjudgments caused by users not understanding the meaning of the indicator lights. Even non-professionals can accurately understand the test results, greatly reducing the threshold for use.

[0010] In a further technical solution, a storage cavity is provided on the rear side of the housing, and a storage slot is provided on the top of the storage cavity. The storage cavity and the storage slot are used to store the test probe module.

[0011] By creating dedicated storage cavities and slots on the housing, a perfect storage space is provided for the detachable test probe modules, making the entire device highly integrated, easy to carry and store, avoiding the risk of losing accessories, and improving the overall product quality and user experience.

[0012] In a further technical solution, a battery compartment is also provided on the rear side of the housing.

[0013] By incorporating a built-in battery compartment, the tester is provided with an independent power source, eliminating its dependence on on-site power supplies. This allows the tester to work anytime, anywhere, making it particularly suitable for applications without power interfaces or requiring mobile testing, thus enhancing the device's portability and application range.

[0014] In a further technical solution, a connector is provided inside the handle, and adapter blocks are fixed on both sides of the hinge base. The lines of the first probe, the second probe, and the third probe extend into the handle through the adapter blocks and are electrically connected to the connector.

[0015] The probe leads are reliably guided to the connector inside the handle via an adapter block. This design ensures that the internal wiring will not be twisted or worn when the handle is hinged and the probe is rotated, improving the reliability and durability of the wiring connection and extending the service life of the test probe module.

[0016] In a further technical solution, a connector is fixed inside the receiving cavity. The connector is electrically connected to the signal processing module, and the connector is electrically connected to the wiring head of the test probe module via a detachable cable.

[0017] By incorporating a connector within the housing, a standardized and rapid connection between the test probe module and the main body is achieved. Users can easily complete the connection simply by plugging and unplugging, making operation extremely convenient while ensuring the stability and reliability of electrical signal transmission.

[0018] In a further technical solution, the signal processing module includes a circuit board, and a digital display circuit module, a status indicator circuit module, a main control microcontroller module, an isolation protection circuit module, a buzzer module, a start circuit module, a digital-to-analog conversion circuit module, and a voltage divider attenuation circuit module disposed on the circuit board;

[0019] The digital display circuit module is electrically connected to the display screen, the status indicator circuit module is electrically connected to the ground indicator, the reverse connection indicator and the voltage abnormality indicator, and the voltage divider attenuation circuit module is electrically connected to the connector.

[0020] The input terminal of the digital-to-analog converter module is connected to the output terminal of the voltage divider attenuation circuit module, the output terminal of the digital-to-analog converter module is electrically connected to the main control microcontroller module, and the start circuit module is electrically connected to the start button.

[0021] By highly integrating the various functional modules onto a single circuit board and clearly defining their electrical connections, a complete, efficient, and stable signal processing system is formed. This structure has a clear layout, reduces internal flying wires, improves anti-interference capabilities and measurement accuracy, and facilitates production assembly and subsequent maintenance.

[0022] In a further technical solution, the circuit board is also provided with a charging and discharging circuit, which is connected to the battery compartment and the main control microcontroller module.

[0023] In a further technical solution, the two ends of the cable are connected to a connector and a terminal block via a threaded connection.

[0024] The cable ends are connected by threads, which provides mechanical locking force and ensures a firm and reliable connection. This effectively prevents the cable from coming loose due to accidental pulling during testing, thus avoiding the risk of exposing live interfaces and further enhancing the safety of the equipment.

[0025] In summary, the present invention has the following advantages: the retractable probe module and the built-in battery design make the device small and compact, and it can work without an external power source, making it very convenient to carry and use in the field.

[0026] The indicator system, which combines indicator lights and text labels, transforms professional electrical parameters into clear graphic and textual information, enabling ordinary users to quickly and accurately determine the status of the socket without training.

[0027] Extremely adaptable to various environments: The multi-directional adjustable hinged handle and rotatable probe design give the tester excellent flexibility, making it easy to handle various socket testing scenarios with narrow installation positions and inconvenient angles. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 2 This is a second perspective view of the present invention;

[0031] Figure 3 This is a first structural schematic diagram of the test probe module of this utility model;

[0032] Figure 4 This is a second structural schematic diagram of the test probe module of this utility model;

[0033] Figure 5 This is a schematic diagram of the signal processing module of this utility model;

[0034] In the diagram: 100, Housing; 101, Display screen; 102, Start button; 103, Grounding indicator; 104, Reverse connection indicator; 105, Voltage abnormality indicator; 106, First text label area; 107, Second text label area; 108, Third text label area; 109, Storage slot; 110, Storage cavity; 111, Connector; 112, Battery compartment; 200, Test probe module; 201, Plug; 202, Handle; 203, Hinge base ; 204. Adapter block; 205. Rotating block; 206. First probe; 207. Second probe; 208. Third probe; 209. Connector; 300. Circuit board; 301. Digital display circuit module; 302. Status indicator circuit module; 303. Main control microcontroller module; 304. Isolation protection circuit module; 305. Buzzer module; 306. Start-up circuit module; 307. Digital-to-analog conversion circuit module; 308. Voltage divider attenuation circuit module. Detailed Implementation

[0035] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0037] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] like Figures 1-5 As shown, a microcontroller-based rapid voltage tester for a three-hole socket includes a main module, a test probe module 200, and a signal processing module installed within the main module.

[0041] The main module includes a housing 100, on which a display screen 101 is installed to display the specific voltage value. A start button 102 is also provided on the housing 100 for one-button start, which controls the entire tester to start detecting the voltage of the three-hole socket.

[0042] In one embodiment, the housing 100 is also provided with a grounding indicator 103, a reverse connection indicator 104, and a voltage abnormality indicator 105. During testing, the grounding indicator 103 lights up, indicating that the three-hole socket is not effectively grounded. When the reverse connection indicator 104 lights up, it indicates that the live and neutral connections are reversed. The voltage abnormality indicator 105 has two color states: red and green. When the green light of the voltage abnormality indicator 105 lights up, it indicates that the voltage is normal and the three-hole socket can work normally. If the red light lights up, it indicates that the voltage is too high or too low and does not meet the preset voltage value. At this time, the voltage value will be displayed on the display screen 101.

[0043] In one embodiment, the housing 100 is further provided with a first text marking area 106, a second text marking area 107 and a third text marking area 108, which correspond to the grounding indicator light 103, the reverse connection indicator light 104 and the voltage abnormality indicator light 105, respectively. The first text marking area 106 is engraved with the words "not grounded", the second text marking area 107 is engraved with the words "neutral and live wires reversed" and the third text marking area 108 is engraved with the words "not up to standard".

[0044] In one embodiment, a storage cavity 110 is provided on the rear side of the housing 100, and a storage slot 109 is provided at the top of the storage cavity 110. The storage cavity 110 and the storage slot 109 are used to store the test probe module 200.

[0045] In one embodiment, a battery compartment 112 is also provided on the rear side of the housing 100 for installing batteries.

[0046] In one embodiment, the test probe module 200 includes a plug 201, a hinge seat 203 fixed on the plug 201, and a handle 202 hinged between the hinge seats 203, so that the user can hold the handle 202 to insert the test probe module 200 into the three-hole socket for testing.

[0047] The hinged design allows for rotational adjustment based on the available space in front of the three-hole socket. For example, when the space in front of the three-hole socket is small, the handle 202 can be swung horizontally and inserted into the narrow space for testing. When the space around the three-hole socket is small, the handle 202 can be raised vertically so that it is perpendicular to the three-hole socket for insertion testing, thus improving its applicability.

[0048] In one embodiment, the plug 201 is further provided with three rotatable rotating blocks 205. The rotating blocks 205 are located on the plug 201 on the side opposite to the hinge seat 203. A first probe 206, a second probe 207, and a third probe 208 are respectively fixedly installed on the three rotating blocks 205. The distribution of the first probe 206, the second probe 207, and the third probe 208 conforms to the distribution layout of the ground wire, neutral wire, and live wire of a three-hole plug.

[0049] The rotating block 205 is designed to adjust the rotation angles of the first probe 206, the second probe 207, and the third probe 208 according to different three-hole sockets, thereby adapting to different three-hole sockets.

[0050] In one embodiment, a connector 209 is provided inside the handle 202, and adapter blocks 204 are fixed on both sides of the hinge base 203. The lines of the first probe 206, the second probe 207 and the third probe 208 extend into the handle 202 through the adapter blocks 204 and are electrically connected to the connector 209.

[0051] In one embodiment, a connector 111 is fixed inside the storage cavity 110. The connector 111 is electrically connected to the signal processing module. The connector 111 and the terminal 209 can be electrically connected by connecting an external cable. A connecting ring is provided at the circumferential edge gap of the terminal 209 to prevent the user from getting an electric shock. In this embodiment, both ends of the external cable are connected to the connector 111 and the terminal 209 by threads to prevent accidental disconnection and electric shock.

[0052] In one embodiment, the signal processing module includes a circuit board 300, and a digital display circuit module 301, a status indicator circuit module 302, a main control microcontroller module 303, an isolation protection circuit module 304, a buzzer module 305, a start circuit module 306, a digital-to-analog conversion circuit module 307, and a voltage divider attenuation circuit module 308 disposed on the circuit board.

[0053] Specifically, the digital display circuit module 301 is electrically connected to the main control microcontroller module 303 and the display screen 101. The digital display circuit module 301 receives electrical signals from the main control microcontroller module 303, electrically connects the main control microcontroller module 303, and displays voltage, fault, and other information on the display screen 101. The status indicator circuit module 302 is electrically connected to the grounding indicator 103, the reverse connection indicator 104, and the voltage abnormality indicator 105, controlling the operation of these indicators. Simultaneously, the status indicator circuit module 302 is electrically connected to the main control microcontroller module 303 and is controlled by it. Voltage attenuation... The voltage divider attenuation circuit module 308 is electrically connected to the connector 111, thereby enabling the voltage divider attenuation circuit module 308 to be electrically connected to the first probe 206, the second probe 207, and the third probe 208; the isolation protection circuit module 304 is connected in series at the input terminal of the voltage divider attenuation circuit module 308; the input terminal of the digital-to-analog converter circuit module 307 is connected to the output terminal of the voltage divider attenuation circuit module 308, and the output terminal of the digital-to-analog converter circuit module 307 is electrically connected to the main control microcontroller module 303; the start circuit module 306 is electrically connected to the IO pin of the main control microcontroller module 303, and the start circuit module 306 corresponds to the start button 102; the buzzer module 305 is electrically connected to the main control microcontroller module 303.

[0054] In one embodiment, the circuit board 300 is also provided with a charging and discharging circuit, which connects the battery compartment and the main control microcontroller module 303.

[0055] During testing, the test probe module 200 is pulled out and connected to the connector 111 and the terminal 209 via an external cable. According to the style of the three-hole socket, the three rotating blocks 205 are rotated and adjusted so that the first probe 206, the second probe 207 and the third probe 208 are adjusted to the appropriate positions. Then, the first probe 206, the second probe 207 and the third probe 208 are inserted into the three-hole socket, and the start button 102 is pressed to start the test.

[0056] Signal input / output process: After the rotating block 205, the first probe 206, and the second probe 207 are inserted into the three-hole socket, the electrical signal is connected to the tester through the isolation protection circuit module 304. The high-voltage current-limiting resistor and TVS diode in the isolation protection circuit module 304 are connected to the precision resistor voltage divider network in the voltage divider attenuation circuit module 308. The voltage divider network in the voltage divider attenuation circuit module 308 transmits the signal to the conversion chip in the digital-to-analog converter circuit module 307, and then connects to the ADC input pin of the main control microcontroller module 303. Then, the main control microcontroller module 303 inputs the signal to the digital display circuit module 301, the status indicator circuit module 302, and the buzzer module 305.

[0057] The control logic of the main control microcontroller module 303: After the rotating block 205, the first probe 206 and the second probe 207 are inserted into the three-hole socket, three sets of signals are obtained. The main control microcontroller module 303 sequentially samples the conditioned signals corresponding to the three sets of voltages LN, L-PE and N-PE at high speed.

[0058] The main control microcontroller module 303 processes the sampled data (filters and calculates the effective value) to obtain three voltage values: V_LN, V_LPE, and V_NPE.

[0059] The microcontroller performs state judgments based on preset logic:

[0060] If V_LN is within the normal range (e.g., 198V-242V), the "normal voltage" green light of the voltage abnormality indicator 105 will illuminate; if it is too high or too low, the "abnormal voltage" red light will illuminate. At this time, the main control microcontroller module 303 will control and trigger the buzzer module 305 to alarm according to the judgment result.

[0061] If V_LN is close to 0, it indicates that there may be a missing fire or a missing zero.

[0062] Compare V_LPE and V_LN:

[0063] If the two are very close (the difference is very small), it indicates that the PE line may not be effectively grounded (short-circuited with the N line or floating but induced with voltage).

[0064] If V_LPE is significantly greater than V_NPE and V_LPE is close to V_LN, it indicates that the PE line may be effectively grounded (at this time, V_NPE should be close to 0; if it is not 0, the N line may be live or poorly grounded).

[0065] Simplified grounding effectiveness judgment: Set a threshold. If V_NPE < threshold (e.g., 2-5V), the PE line is considered to be well connected (effective grounding); if V_NPE > threshold but V_LPE exists, the PE line is considered to be connected but may be faulty (high impedance); if there is no V_LPE, there is no grounding. At this time, the main control microcontroller module 303 controls the grounding indicator light 103 to light up according to the judgment result.

[0066] Determining reverse polarity: By detecting the voltage between N and PE, it should normally be close to 0V. If V_NPE is significantly higher than 0 after insertion (close to the phase voltage), it is very likely that the neutral and live wires are reversed (at this time, the N wire is actually the live wire). In this case, the main control microcontroller module 303 controls the reverse polarity indicator 104 to light up according to the judgment result.

[0067] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0068] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0069] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A microcontroller-based rapid voltage tester for a three-hole socket, comprising a main module, a test probe module (200), and a signal processing module, wherein the main module includes a housing (100), a display screen (101) and a start button (102) are mounted on the housing (100), and the signal processing module is installed inside the housing (100); characterized in that: The test probe module (200) includes a plug (201), a hinge seat (203) fixed on the plug (201), a handle (202) hinged on the hinge seat (203), and three rotatable rotating blocks (205) on the plug (201). A first probe (206), a second probe (207), and a third probe (208) are respectively fixed on the three rotating blocks (205). The test probe module (200) is electrically connected to the signal processing module via a detachable cable.

2. The rapid voltage tester for a three-hole socket according to claim 1, characterized in that: The housing (100) is also provided with a grounding indicator (103), a reverse connection indicator (104), and a voltage abnormality indicator (105).

3. The rapid voltage tester for a three-hole socket according to claim 2, characterized in that: The housing (100) is also provided with a first text identification area (106), a second text identification area (107) and a third text identification area (108).

4. The rapid voltage tester for a three-hole socket according to claim 3, characterized in that: The housing (100) has a storage cavity (110) on its rear side, and a storage slot (109) is provided at the top of the storage cavity (110). The storage cavity (110) and the storage slot (109) are used to store the test probe module (200).

5. The rapid voltage tester for a three-hole socket according to claim 4, characterized in that: A battery compartment (112) is also provided on the rear side of the housing (100).

6. The rapid voltage tester for a three-hole socket according to claim 5, characterized in that: A connector (209) is provided inside the handle (202), and adapter blocks (204) are fixed on both sides of the hinge base (203). The lines of the first probe (206), the second probe (207) and the third probe (208) extend into the handle (202) through the adapter blocks (204) and are electrically connected to the connector (209).

7. The rapid voltage tester for a three-hole socket according to claim 6, characterized in that: A connector (111) is fixed inside the receiving cavity (110). The connector (111) is electrically connected to the signal processing module. The connector (111) is electrically connected to the terminal (209) of the test probe module (200) via a detachable cable.

8. The rapid voltage tester for a three-hole socket according to claim 7, characterized in that: The signal processing module includes a circuit board (300), and a digital display circuit module (301), a status indicator circuit module (302), a main control microcontroller module (303), an isolation protection circuit module (304), a buzzer module (305), a start circuit module (306), a digital-to-analog conversion circuit module (307), and a voltage divider attenuation circuit module (308) disposed on the circuit board (300). The digital display circuit module (301) is electrically connected to the display screen (101), the status indicator circuit module (302) is electrically connected to the ground indicator (103), the reverse connection indicator (104) and the voltage abnormality indicator (105), and the voltage divider attenuation circuit module (308) is electrically connected to the connector (111). The input terminal of the digital-to-analog converter circuit module (307) is connected to the output terminal of the voltage divider attenuation circuit module (308), the output terminal of the digital-to-analog converter circuit module (307) is electrically connected to the main control microcontroller module (303), and the start circuit module (306) is electrically connected to the start button (102).

9. The rapid voltage tester for a three-hole socket according to claim 8, characterized in that: The circuit board (300) is also provided with a charging and discharging circuit, which is connected to the battery compartment (112) and the main control microcontroller module (303).

10. The rapid voltage tester for a three-hole socket according to claim 7, characterized in that: The two ends of the cable are connected to the connector (111) and the terminal block (209) by a threaded connection.

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