Portable multi-terminal short circuit detection device based on relay logic circuit and detection method thereof

Abstract

The invention discloses a portable multi-terminal short circuit detection device based on a relay logic circuit and a detection method thereof, and relates to the technical field of electronic detection. Comprising a control box body, a power supply module is arranged in the control box body, the power supply module adopts a direct-current power supply, the direct-current power supply is converted through a 220V alternating-current input power supply, the direct-current power supply is connected with a detection circuit, the detection circuit is connected with an output module, and the output module adopts a sound-light alarm module. The detection circuit is further connected with the input interface and the operation module, the input interface adopts a DB9 quick-connection female head, and the operation module adopts a foot switch. The system does not need to depend on an MCU or a PLC system, and rapid judgment, sound-light alarm and test result voice broadcast are achieved through the direct-current solid-state relay logic circuit.

Description

Technical Field

[0001] This invention relates to the field of electronic testing technology, specifically to a portable multi-terminal short-circuit detection device and its detection method based on relay logic circuits. Background Technology

[0002] Currently, the detection of short circuits or overlaps between embedded terminals in injection molded parts mainly relies on manual multimeter inspections or PLC / MCU-based intelligent testing equipment, which has the following shortcomings:

[0003] 1. High cost: PLC or MCU control solutions require programming and complex circuits, resulting in high equipment costs;

[0004] 2. Low efficiency: Manual multimeter inspection is time-consuming and depends on the operator's experience;

[0005] 3. Poor portability: Existing devices are bulky and difficult to move quickly and adapt to different products;

[0006] 4. Limited expandability: Most devices are designed for a fixed number of channels (such as 6 channels) and cannot be flexibly adapted to 2-6 channel terminal products.

[0007] In summary, this invention presents a low-cost, portable control device and detection method for detecting short circuits between pre-embedded multi-terminals in injection molded parts. It does not rely on MCU or PLC systems and achieves rapid judgment and audible and visual alarms through DC solid-state relay logic circuits, with test results broadcast via voice. Summary of the Invention

[0008] To address the shortcomings of existing technologies that rely primarily on manual multimeter inspections or PLC / MCU-based intelligent testing equipment for detecting short circuits or overlaps between embedded terminals in injection molded parts, the present invention aims to provide a portable multi-terminal short circuit detection device and its detection method based on relay logic circuits.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solution: a portable multi-terminal short-circuit detection device based on relay logic circuit, comprising a control box body, wherein a power module is provided inside the control box body, the power module adopts a DC power supply, the DC power supply is converted through a 220V AC input power supply, the DC power supply is connected to a detection circuit, the detection circuit is connected to an output module, the output module adopts an audible and visual alarm module, the detection circuit is also connected to an input interface and an operation module, the input interface adopts a DB9 quick-connect female connector, and the operation module adopts a foot switch.

[0010] Preferably, the detection circuit includes a main detection circuit, and the main detection circuit 31, which is connected to the power supply module, is connected to the audible and visual alarm circuit through a delay module; the delay module adopts an intelligent time relay.

[0011] Preferably, the main detection circuit includes a DC solid-state relay, an intermediate relay, a smart time relay, and an audible and visual alarm module. The solid-state relays are respectively disposed between each pair of terminals. The smart time relay is connected to a foot switch and receives signals from the foot switch. Its internal delay time is set to 0.6 seconds to control the duration of the detection result. The DC solid-state relay is connected to both the intermediate relay and the audible and visual alarm module.

[0012] Preferably, the audible and visual alarm module triggers an alarm when a short circuit occurs by broadcasting "Test short circuit" via voice, and maintains a flashing red light and a buzzer alarm state until the test product is disconnected.

[0013] A portable multi-terminal short-circuit detection method includes the following steps:

[0014] 1. Insert the test plug corresponding to the number of terminals of the product under test into the DB9 quick-connect female connector of the control box. After inserting the test plug, step on the foot switch to start the test.

[0015] 2. If there is no short circuit between the terminals, the green light will immediately illuminate and remain on for 0.6 seconds, and a voice announcement will be made saying "Test passed" once.

[0016] 3. If a short circuit exists between terminals, a voice announcement of "Test short circuit" will be triggered immediately, and the red light will flash and the buzzer will continue to sound an alarm until the test product is disconnected;

[0017] 4. The system will automatically reset after the test is completed, ready for the next test.

[0018] The present invention has the following beneficial effects:

[0019] 1. Low-cost circuit design: Logic circuits composed of components such as DC solid-state relays, intermediate relays, and intelligent time relays are used to replace MCUs / PLCs, reducing hardware costs;

[0020] 2. Rapid judgment mechanism: Through the coordinated operation of DC solid-state relays, intermediate relays, and intelligent time relays, the result is output instantly;

[0021] 3. Portability and expandability: The control box features a pluggable DB9 quick-connect female design, allowing for quick plugging and unplugging to accommodate different product test plugs;

[0022] 4. Multi-channel testing compatibility: Supports, but is not limited to, 2-6 channel terminal product testing, expandable to 9 channels. Attached Figure Description

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;

[0024] Figure 1This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a block diagram of the detection circuit of the present invention;

[0026] Figure 3 This is a circuit diagram of Embodiment 1 of the present invention;

[0027] Figure 4 This is a circuit diagram of the power module of Embodiment 1 of the present invention. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0029] Reference Figure 1-2 The specific implementation adopts the following technical solution: a portable multi-terminal short circuit detection device based on relay logic circuit, including a control box body 1, wherein a power module is provided in the control box body 1, the power module adopts a DC power supply 2, the DC power supply 2 is converted through a 220V AC input power supply, the DC power supply 2 is connected to a detection circuit 3, the detection circuit 3 is connected to an output module, the output module adopts an audible and visual alarm module 4, the detection circuit 3 is also connected to an input interface and an operation module, the input interface adopts a DB9 quick-connect female connector, and the operation module adopts a foot switch 5.

[0030] It is worth noting that the detection circuit 3 includes a main detection circuit 31, which is connected to the power supply module and then connected to the audible and visual alarm circuit 33 via a delay module 32; the delay module 32 is an intelligent time relay.

[0031] It is worth noting that the main detection circuit 31 includes a DC solid-state relay, an intermediate relay, an intelligent time relay, and an audible and visual alarm module. The solid-state relays are respectively set between each pair of terminals. The intelligent time relay is connected to the foot switch 5. The intelligent time relay is used to receive the foot switch signal and has an internal delay time of 0.6 seconds to control the duration of the detection result. The intermediate relays are connected in parallel with the DC solid-state relay and the audible and visual alarm module.

[0032] In addition, the aforementioned audible and visual alarm module triggers an alarm when a short circuit occurs by broadcasting "Test short circuit" via voice, and maintains a flashing red light and a buzzer alarm state until the test product is disconnected.

[0033] A portable multi-terminal short-circuit detection method includes the following steps:

[0034] 1. Insert the test plug corresponding to the number of terminals of the product under test into the DB9 quick-connect female connector of the control box. After inserting the test plug, step on the foot switch to start the test.

[0035] 2. If there is no short circuit between the terminals, the green light will immediately illuminate and remain on for 0.6 seconds, and a voice announcement will be made saying "Test passed" once.

[0036] 3. If a short circuit exists between terminals, a voice announcement of "Test short circuit" will be triggered immediately, and the red light will flash and the buzzer will continue to sound an alarm until the test product is disconnected;

[0037] 4. The system will automatically reset after the test is completed, ready for the next test.

[0038] This specific implementation uses DC solid-state relays, intermediate relays, and intelligent time relays to construct the main detection logic circuit; it realizes automatic detection and judgment without MCU / PLC control; it supports rapid plug-in / plug-out testing of 2-6 terminal products; it provides multiple result feedback mechanisms such as voice broadcast, green light (pass), and red light + buzzer alarm (fail); and it has a delayed reset function to improve the ease of operation.

[0039] Example 1: Refer to Figure 3-4 A portable multi-terminal short-circuit detection device based on relay logic circuitry, the circuit of which includes a power supply module (such as...) Figure 4 As shown), the power supply module converts 220V AC to 24V DC and also includes a main detection circuit: DC solid-state relay coils (K1-K5 voltage range 3-32V) are connected in series between terminals, and the alarm circuit is connected in series in the normally open contacts of each relay. If any one or more DC solid-state relays lose power and open circuit, it will cause one or more normally open contacts of DC solid-state relays to open, causing the intermediate relay K6 to lose power; Delay module: The foot switch triggers the intelligent time relay T1, delays the control, and determines the output result; Audible and visual alarm module: The normally open and normally closed contacts of the intermediate relay K6 are connected in parallel to the normally open contact of the intelligent module time relay T1, which respectively control the green indicator light warning, the voice module test pass broadcast, the red light flashing, the buzzer alarm, and the voice module test short circuit broadcast.

[0040] This embodiment reduces costs by 90%: it eliminates the need for MCU and software design, requiring only a simple relay circuit; it improves detection efficiency: it outputs results instantly, eliminating the need for manual multimeter inspection and judgment; it is highly portable: the control box is ≤20cm×20cm×13cm in size, supporting mobile use; and it is multi-channel compatible: it can be adapted to the testing needs of 2-6 terminal products by changing the plug.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A portable multi-terminal short-circuit detection device based on relay logic circuits, characterized in that, The system includes a control box body (1), which contains a power module. The power module uses a DC power supply (2), which is converted from a 220V AC input power supply. The DC power supply (2) is connected to a detection circuit (3), which is connected to an output module. The output module uses an audible and visual alarm module (4). The detection circuit (3) is also connected to an input interface and an operation module. The input interface uses a DB9 quick-connect female connector, and the operation module uses a foot switch (5).

2. The portable multi-terminal short-circuit detection device and its detection method based on relay logic circuits according to claim 1, characterized in that, The detection circuit (3) includes a main detection circuit (31), which is connected to the power supply module and is connected to the sound and light alarm circuit (33) through a delay module (32); the delay module (32) adopts an intelligent time relay.

3. The portable multi-terminal short-circuit detection device and its detection method based on relay logic circuits according to claim 2, characterized in that, The main detection circuit (31) includes a DC solid-state relay, an intermediate relay, an intelligent time relay and an audible and visual alarm module; the solid-state relays are respectively set between each pair of terminals, the intelligent time relay is connected to the foot switch (5), the intelligent time relay is used to receive the foot switch signal, and the internal delay time is set to 0.6 seconds to control the maintenance time of the detection result, and the DC solid-state relay is connected to the intermediate relay and the audible and visual alarm module respectively.

4. The portable multi-terminal short-circuit detection device based on relay logic circuit according to claim 1, characterized in that, The aforementioned audible and visual alarm module triggers an alarm when a short circuit occurs by broadcasting "Test short circuit" via voice and maintaining a flashing red light and buzzer alarm state until the test product is disconnected.

5. A portable multi-terminal short-circuit detection method, characterized in that, Includes the following steps: (1) Insert the test plug corresponding to the number of terminals of the product under test into the DB9 quick-connect female connector of the control box. After inserting the test plug, step on the foot switch to start the test. (2) If there is no short circuit between terminals, the green light will be triggered immediately and will remain on for 0.6 seconds, and a voice message will be broadcast once saying "Test passed"; (3) If a short circuit exists between terminals, a voice broadcast of "test short circuit" will be triggered immediately, and the red light will flash and the buzzer will continue to sound an alarm until the test product is disconnected. (4) The system will automatically reset after the test is completed, and prepare for the next test.

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