Teaching aid for training ground resistance measurement skills

Abstract

The utility model discloses a ground resistance measurement skill training teaching aid, and belongs to the technical field of electrical practical training teaching. The teaching aid aims at solving the problems that an existing training device is insufficient in skill point coverage rate and cannot simulate a complete measurement process, and ground resistance measurement full skill point simulation training is achieved through integrated structure design. The teaching aid comprises a grounding electrode, a simulation iron tower, an adjustable resistance module and a plurality of groups of interactive training units: a wiring and probe installation simulation module with three position switches is arranged, the position switches need to be correctly switched to match measuring line layout and probe installation rules, and otherwise, infinite characteristic values are output; configuring a wiring assessment module containing five alternative jacks, and simulating a real wiring scene by selectively accessing the E / P / C end of the grounding resistance meter; a detachable simulation iron tower and a grounding down lead are arranged, the dismounting operation is forcibly required to be standard, and zero value feedback is triggered by wrong operation; and the built-in adjustable resistance module can randomly set a resistance value to be measured so as to enhance the training diversity. The teaching aid realizes full coverage of eight core skill points through structural innovation, has a misoperation characteristic feedback function, remarkably improves the simulation degree and assessment efficiency of indoor simulation training, effectively relieves the pressure of outdoor practical operation resources, and is suitable for electrical maintenance practical training and special operation assessment scenes.

Description

Technical Field

[0001] This utility model relates to the field of electrical training and teaching equipment technology, specifically to a simulation teaching aid for training grounding resistance measurement skills, which is particularly suitable for electrical maintenance training and special operation certificate electrical work practical assessment scenarios. Background Technology

[0002] Grounding resistance measurement is a key indicator for assessing the safety of grounding grids and is widely used in construction, power, petrochemical, and other fields. Currently, related skills training mainly relies on two methods:

[0003] 1. Outdoor field measurement: Although it can provide comprehensive training in skills, it suffers from problems such as low training efficiency, large workstation area (approximately 100㎡ / workstation), and high resource consumption, making it difficult to meet the needs of large-scale teaching.

[0004] 2. Traditional simulation teaching aids: The grounding grid is simplified into a fixed junction box (such as a 50cm×10cm×10cm box), which only supports the wiring of the grounding resistance meter (E / P / C terminals) and the operation of the test. The skill point coverage is less than 50% (only covering instrument inspection, short circuit verification, and test). It cannot simulate key steps such as disassembling and assembling down conductors, laying measuring lines, and installing probes, so students still need to rely on outdoor practical training to make up for their skill gaps.

[0005] Therefore, there is an urgent need for an indoor training tool that can cover all skill points in the process, is highly realistic, and has error feedback function, in order to improve teaching efficiency and reduce the pressure on outdoor practical resources. Summary of the Invention

[0006] This invention aims to solve the problems of low coverage of skill points and insufficient simulation of existing teaching aids. Through modular design, it realizes indoor simulation training of the entire process of grounding resistance measurement (8 skill points) and provides error operation feature feedback function, which significantly improves teaching and assessment efficiency.

[0007] The teaching aids include the following core modules:

[0008] 1. Probe deployment and measurement line interaction module: Set up three wiring and probe specification setting position switches (103) to simulate measurement line deployment and probe installation operations; if the position switch is not switched to the correct position, the logic circuit outputs an infinite characteristic value, forcing students to master the standard operation.

[0009] 2. Wiring assessment module: Configure grounding electrode (102) and five alternative sockets (101). Only two sockets are correctly matched with the P (202) and C (201) terminals of the grounding resistance meter (2). Incorrect wiring (such as connecting to an interference socket) triggers an infinite characteristic value to simulate the assessment requirements of a real wiring scenario.

[0010] 3. Grounding down conductor disassembly and assembly simulation module: Set up a simulated iron tower (104) and a detachable grounding down conductor (105); when the down conductor is not disassembled or assembled correctly, the circuit series and parallel design forces the output to zero value to simulate the short circuit error caused by the grounding grid not being disconnected.

[0011] 4. Adjustable resistor module (106): It adopts digital knob adjustment, with a resistance range of 0.1Ω–100Ω, and supports random setting of the test value; it is equipped with a resistance display interface to enhance the diversity of training and the difficulty of assessment.

[0012] 5. Integrated structural design: The outer shell of the teaching aid is a portable box (≤50cm×10cm×10cm), and the internal modules are divided by markings for easy operation and storage.

[0013] The teaching aid has the following effects:

[0014] Full coverage of skills: Complete simulation of 8 skills (including disassembling and assembling lead wires, laying measurement lines, etc.), indoor training can achieve the effect of outdoor practice.

[0015] Error feedback mechanism: Real-time prompts for operational errors through infinity or zero value characteristics, reinforcing standardized training.

[0016] Highly efficient assessment: The adjustable resistor module supports randomly set operating conditions to adapt to assessment requirements of varying difficulty.

[0017] Resource conservation: The portable design reduces site occupation and alleviates resource pressure for outdoor practical training. Attached Figure Description

[0018] Figure 1 : A schematic diagram of the overall structure of the teaching aid, labeled with grounding electrode (102), three wiring and probe specification setting switches (103), simulated iron tower (104), down lead (105), adjustable resistor module (106) and five alternative sockets (101).

[0019] Figure 2 The logic circuit schematic diagram illustrates the connection of each functional component and the control logic for the output of measurement results. Detailed Implementation

[0020] 1. Teaching aid initialization:

[0021] Move the three wiring and probe specification setting switches (103) to random positions and adjust the adjustable resistor module (106) to set the target resistance value (e.g., 10Ω).

[0022] The simulated iron tower (104) and the grounding electrode (102) are connected by the grounding down conductor (105) to construct the grounding grid to be tested.

[0023] 2. Operating Procedures:

[0024] Step 1: Check the grounding resistance meter (2) and perform a short-circuit test;

[0025] Step 2: Disconnect the down conductor (105) between the simulated iron tower (104) and the grounding electrode (102). If it is not disconnected, the measurement result will be 0.

[0026] Step 3: Connect the E (203), P (202), and C (201) leads of the grounding resistance meter (2) to the grounding electrode (102) and two of the five alternative sockets (101) respectively. If the wires are connected incorrectly, the output will be infinite.

[0027] Step 4: Move the three wiring and probe specification setting switches (103) to the correct positions. An incorrect operation will trigger infinity.

[0028] Step 5: Test and record the results, and compare them with the adjustable resistor setting to verify the accuracy of the operation.

[0029] 3. Error Feedback:

[0030] When the lead wire is not disconnected, the circuit is forced to output 0;

[0031] If there is a wiring error or the position switch is not aligned, the logic circuit outputs infinity and the error type is indicated by an audible and visual prompt.

Claims

1. A training tool for grounding resistance measurement skills, comprising five optional sockets (101), a grounding electrode (102), three wiring and probe specification setting switches (103), a simulated iron tower (104), a grounding down conductor (105), and an adjustable resistance module (106), characterized in that: The teaching aid integrates the following modules to simulate the training of all skills in the grounding resistance measurement process: a probe layout and measurement line interaction module, which has three wiring and probe specification setting position switches (103) to simulate the measurement line layout and probe installation operation. When the position switch is not switched to the correct position, an infinite characteristic value is output; a wiring assessment module, which includes a grounding electrode (102) and five alternative sockets (101). The grounding electrode lead E (203), voltage electrode lead P (202), and current electrode lead C (201) of the grounding resistance meter (2) need to be selectively connected to the corresponding sockets. Incorrect wiring triggers an infinite characteristic value; a grounding lead disassembly and assembly simulation module, which includes a simulated iron tower (104) and a detachable grounding lead (105). If the lead is not disassembled or assembled correctly, the measurement result is fed back as zero; and an adjustable resistor module (106), which is used to randomly set the grounding resistance value to be measured to simulate different working conditions.

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