Instrument with wall checking function

Abstract

The utility model relates to the technical field of instrument, concretely refers to a kind of instrument with wall inspection function, including instrument shell, and install in the multimeter unit and wall detection unit of instrument shell;The electrical measurement capability of traditional multimeter is owned by the multimeter unit;The hidden object inside wall is detected by the wall detection unit.Combined with the function of wall detector multimeter is applicable to a variety of scenarios and market, especially in the field needing to carry out electrical measurement and wall detection simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of instrument technology, specifically to an instrument with a wall inspection function. Background Technology

[0002] In traditional electrical installation and wiring, a multimeter is a crucial tool for testing, diagnosing, and ensuring the correctness and safety of circuits. Wiring through walls (laying wires or cables inside walls) is a common operation in electrical installation, but various problems may arise during practice. The following are some common issues encountered when running wiring through walls.

[0003] 1. The difficulty of grooving and wiring varies depending on the wall material (such as concrete, brick wall, gypsum board, etc.). Grooving load-bearing walls may affect the structural safety of the building.

[0004] 2. There may be water pipes, gas pipes, heating pipes or other electrical wires inside the wall. Running wires through the wall may damage these facilities.

[0005] During electrical installation, a wall detector is needed to avoid the above problems. Its main function is to help users locate hidden objects inside the wall, thereby avoiding damage to these objects during drilling, grooving, or installation.

[0006] The following are the main functions of a wall detector: ensuring that electrical wires are not damaged before drilling or grooving; locating the route of electrical wires to facilitate electrical installation or maintenance; avoiding drilling into metal objects during renovation or installation; and locating the position of metal pipes (such as water pipes and heating pipes).

[0007] In the same scenario, using a multimeter and a wall detector together results in unnecessary cost waste and inconvenience in carrying them.

[0008] To address the aforementioned issues, a wall detector function has been added to the existing multimeter. Utility Model Content

[0009] (I) Technical Issues

[0010] The present invention aims to at least solve the problem in the prior art that a multimeter needs to be used in conjunction with a wall detector to detect the condition of the wall at the installation location during electrical installation and wiring.

[0011] (II) Technical Content

[0012] This solution provides an instrument with wall inspection function, which is achieved by the following specific technical means, including an instrument housing, and a multimeter unit and a wall detection unit installed in the instrument housing;

[0013] The multimeter unit possesses the electrical measurement capabilities of a traditional multimeter;

[0014] The wall detection unit is used to detect hidden objects (such as wires, metal, wood, etc.) inside the wall.

[0015] Preferred technical solution 1: The instrument housing includes a front housing, a rear housing, a display screen, buttons, and a PCBA;

[0016] The buttons and display screen are installed into the mounting holes on the front housing, and the front housing and rear housing are fastened together with screws.

[0017] The PCBA is installed into the front shell and fixed with screws, and the buttons and display screen are electrically connected to the PCBA via ribbon cables;

[0018] The multimeter unit and the wall detection unit are installed in the instrument housing and electrically connected to the PCBA.

[0019] Preferred technical solution 2: The multimeter unit includes a multimeter probe hole component, which is installed into a mounting hole opened at the bottom of the front cover and electrically connected to the PCBA.

[0020] Preferred technical solution 3: The wall detection unit includes a wall induction coil and a sensor. The sensor and the wall induction coil are installed in the back shell and fixed and electrically connected to the PCBA. At the same time, the wall induction coil is electrically connected to the sensor.

[0021] A testing system for instruments was also disclosed, including a main control module, a multimeter core module, a power management module, a signal transmission module, and a signal receiving module;

[0022] The main control module is connected to the MCU on the PCBA and is the core control unit of the system, responsible for coordinating the work of each module, data processing, and outputting results.

[0023] The power management module is connected to the lithium battery and multimeter core module, providing stable power to each module and optimizing system battery life;

[0024] The multimeter core module is connected to the main control module, and the multimeter core module is used to implement various measurement functions related to the multimeter.

[0025] The signal transmitting module and the signal receiving module are connected to the main control module. The signal transmitting module is connected to the sensor to detect changes in the signal intensity of the measured object in real time and capture the magnetic field and reflection distortion signals caused by the measured object. The signal receiving module is also connected to the sensor to amplify, filter, and digitize the sensor signal for easy processing by the MCU.

[0026] (III) Technical Effects

[0027] The above structure gives this solution the following advantages:

[0028] 1. Multifunctional integration: The multimeter combines the functions of a wall detector, allowing one device to meet both electrical measurement and wall detection needs, reducing the amount of tools to carry;

[0029] 2. Improve efficiency: Quickly locate problems and complete measurements during construction or maintenance, saving time;

[0030] 3. Reduced costs: No need to purchase separate multimeters and wall detectors, reducing tool procurement costs;

[0031] 4. Portable and easy to use: Suitable for on-site use, simple to operate, suitable for both professionals and non-professionals;

[0032] Multimeters with integrated wall detector functions are suitable for various scenarios and markets, especially in fields requiring simultaneous electrical measurements and wall detection. Their versatility and portability make them ideal tools for electricians, construction workers, HVAC technicians, and DIY enthusiasts. With the continuous development of the home renovation and construction industries, the market demand for this multi-functional tool will continue to grow. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0035] Figure 2 This is the top view of the solution;

[0036] Figure 3 This is an exploded view of the proposed solution.

[0037] Figure 4 This is a diagram of the module architecture of this solution;

[0038] Figure 5 This is the circuit diagram for the display screen in this solution;

[0039] Figure 6 This is the circuit diagram of the AC motor board for this solution;

[0040] Figure 7 This is a schematic diagram illustrating the working principle of this solution;

[0041] Figure 8 This is the schematic diagram of the ten-thousand-yuan meter for this solution;

[0042] Figure 9 This is the sensor circuit diagram for this solution;

[0043] Figure 10 This is the circuit diagram for testing this solution.

[0044] The components include: 1. Acrylic panel; 2. Front housing; 3. Rear housing; 4. Display screen; 5. Buttons; 6. PCBA; 7. Battery; 8. Induction coil; 9. Anti-slip pad; and 10. Multimeter probe hole components. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0046] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] Please see Figures 1-2 An instrument with wall inspection function, including an instrument housing, and a multimeter unit and a wall detection unit installed in the instrument housing;

[0048] The multimeter unit possesses the electrical measurement capabilities of a traditional multimeter;

[0049] The wall detection unit is used to detect hidden objects (such as wires, metal, wood, etc.) inside the wall.

[0050] The instrument housing includes a front housing 2, a rear housing 3, a display screen 4, buttons 5, and a PCBA 6. Buttons 5 and the display screen 4 are installed into mounting holes on the front housing 2. The front housing 2 and the rear housing 3 are fastened together with screws. The PCBA 6 is installed into the front housing and secured with screws. Buttons 5 and the display screen 4 are connected to the PCBA 6 via ribbon cables. The multimeter unit and the wall detection unit are installed in the instrument housing and connected to the PCBA 6.

[0051] Specifically: The multimeter unit includes a multimeter probe hole component 10, which is installed into the mounting hole at the bottom of the front housing and connected to the PCBA6; the wall detection unit includes a wall induction coil 8 and a sensor, which are installed in the rear housing and fixed, and electrically connected to the PCBA6. The wall induction coil 8 is also electrically connected to the sensor, preferably a magnetoresistive sensor or a Hall effect sensor; a buzzer electrically connected to the PCBA6 is also fixed inside the front housing 2; a battery 7 is also inside the instrument housing, which is installed in the rear housing and fixed with adhesive. The battery 7 supplies power to the sensor, buzzer, display screen 4, induction coil 8, multimeter probe hole component 10, and button 5.

[0052] A multimeter that combines the functions of a wall detector has been developed. This device has a wide range of applications and is mainly aimed at professionals or DIY enthusiasts who need to perform electrical measurements and wall detection at the same time.

[0053] Please see Figure 1-2 The instrument has a wall inspection function. The rear wall of the rear housing 3 is covered with an anti-slip pad 9 to increase the frictional resistance between the instrument and the wall when it is placed on the wall. An acrylic panel 1 is attached to the front wall of the front housing 2.

[0054] This equipment has a wide range of applications and is mainly targeted at professionals or DIY enthusiasts who need to perform electrical measurements and wall detection simultaneously.

[0055] The specific assembly process of the instrument is as follows:

[0056] 1. Button 5 and display screen 4 are installed together inside the front cover;

[0057] 2. Install PCBA6 into the front cover and secure it with screws;

[0058] 3. Multimeter probe hole component 10, buzzer installed inside the front cover;

[0059] 4. Display screen 4 is connected to PCBA6 via a ribbon cable;

[0060] 5. The wall induction coil 8 and sensor are installed in the back cover and connected to PCBA 6;

[0061] 6. Secure the battery to the back cover using adhesive tape and connect it to PCBA6;

[0062] 7. Perform tests and calibrations on the multimeter unit and the wall testing unit;

[0063] 8. Insert the rear cover into the front cover and secure it with screws;

[0064] 9. Anti-slip pad 9 is attached to the back of the back cover;

[0065] 10. Insert the acrylic panel 1 into the front shell and complete the assembly.

[0066] Please see Figures 3-10 The system also discloses an instrument testing system, including a main control module, a multimeter core module, a power management module, a signal transmission module, and a signal receiving module;

[0067] The main control module is connected to the MCU (low-power MCU, such as STM32 series, ESP32) on PCBA6. It is the core control unit of the system and is responsible for coordinating the work of each module, data processing, and output results.

[0068] The power management module connects to the battery 7 and the multimeter core module, providing stable power to each module and optimizing system battery life;

[0069] The multimeter core module is connected to the main control module and is used to control the multimeter unit. It has a reset function, protection circuit, detection circuit, and calibration function, and realizes various measurement functions of the multimeter, including ACV, DCV, DCA, ACA, resistance, continuity, capacitance, inductance, frequency, and NCV. The MCU controls the opening and closing of this function module, and enters various preset measurement functions to enter the test state. The test signal is connected through the external red and black probes, and the measurement result is transmitted to the MCU through the protocol for display on screen 4 and other operations.

[0070] The signal transmitting module and signal receiving module are connected to the main control module. The signal transmitting module is connected to the sensor to detect changes in the signal intensity of the measured object in real time and capture the magnetic field and reflection distortion signals caused by the measured object. Specifically, after the sensor is powered on, it continuously outputs analog voltage, current, and reflection frequencies of different materials proportional to various signal intensities. When the measured object approaches, changes in the magnetic field and reflection signal distribution cause fluctuations in the sensor's output voltage, current, and frequency. The signal receiving module is also connected to the sensor and is used to amplify, filter, and digitize the sensor signal for easy processing by the MCU.

[0071] Based on the data fed back by the signal receiving module, the main control module triggers an alarm / buzzer when metal is detected, and outputs coordinate or depth information to the display screen 4 to realize human-machine interaction; if no metal is detected, it enters sleep mode.

[0072] It is worth noting that the specific models of the main control module, multimeter core module, power management module, signal transmission module, signal receiving module, sensor, PCBA6, display screen 4, button 5, induction coil 8, battery 7, buzzer, etc. mentioned in this embodiment, as well as their matching power supply and control switch, can also be provided by the manufacturer. The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and there is no need to elaborate further.

[0073] The following are its specific use cases and application markets:

[0074] 1. Home renovation and repair:

[0075] Scenario: In home renovation, it is necessary to drill holes or create grooves in the walls (such as for installing light fixtures, sockets, TV mounts, etc.). When repairing electrical circuits, it is necessary to locate the wires or pipes inside the walls.

[0076] Applications: Use the wall detection function to avoid drilling into electrical wires or water pipes; use the multimeter function to test circuit continuity, voltage, and other parameters.

[0077] 2. Electrical installation and maintenance:

[0078] Scenario: When installing or repairing electrical circuits, electricians need to confirm the wiring routing inside the walls; check if the circuit is energized; and determine the fault location.

[0079] Applications: Use the wall detection function to locate electrical wires or metal pipes; use the multimeter function to measure parameters such as voltage, current, and resistance.

[0080] 3. Construction scene:

[0081] During building construction, it is necessary to confirm the internal structure of the walls (such as steel bars, wooden beams, etc.); when installing electrical equipment, it is necessary to avoid concealed facilities.

[0082] Applications: Use the wall detection function to locate steel bars, timber, or pipes; use the multimeter function to test the electrical parameters of temporary circuits.

[0083] 4. HVAC and piping installation:

[0084] Scenario: When installing or repairing heating or water pipes, it is necessary to confirm the pipe routing inside the wall; and to check the working status of electrical equipment (such as water pumps and controllers).

[0085] Applications: Use the wall detection function to locate metal or plastic pipes; use the multimeter function to detect parameters such as voltage and current of equipment;

[0086] 5. DIY enthusiast scenario:

[0087] DIY enthusiasts need to perform electrical measurements and wall inspections simultaneously during home renovation or construction projects;

[0088] Applications: Use the wall detection function to avoid damaging the internal structure of the wall; use the multimeter function to test the electrical performance of homemade circuits.

[0089] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An instrument with wall inspection function, characterized in that: Includes the instrument housing, and the multimeter unit and wall detection unit installed in the instrument housing; The multimeter unit possesses the electrical measurement capabilities of a traditional multimeter; The wall detection unit is used to detect hidden objects inside the wall. The instrument housing includes a front housing (2), a rear housing (3), a display screen (4), buttons (5), and a PCBA (6). The button (5) and the display screen (4) are installed in the mounting holes on the front housing (2), and the front housing (2) and the rear housing (3) are fastened together with screws. The PCBA (6) is installed in the front shell and fixed with screws, and the buttons (5) and the display screen (4) are electrically connected to the PCBA (6) through ribbon cables; The multimeter unit and the wall detection unit are installed in the instrument housing and electrically connected to the PCBA (6); The multimeter unit includes a multimeter probe hole component (10), which is installed in the mounting hole opened at the bottom of the front housing and electrically connected to the PCBA (6). The wall detection unit includes a wall induction coil (8) and a sensor. The sensor and the wall induction coil (8) are installed in the back shell and fixed and electrically connected to the PCBA (6). At the same time, the wall induction coil (8) is electrically connected to the sensor. The instrument also includes a detection system, which includes a main control module, a multimeter core module, a power management module, a signal transmission module, and a signal receiving module. The main control module is connected to the MCU on the PCBA (6) and is the core control unit of the system, responsible for coordinating the work of each module, data processing, and result output; The power management module is connected to the lithium battery (7) and the multimeter core module to provide stable power supply to each module; The multimeter core module is connected to the main control module. The multimeter core module is used to realize the multimeter's ACV, DCV, DCA, ACA, resistance, continuity, capacitance, inductance, frequency, and NCV measurement functions. The signal transmitting module and the signal receiving module are connected to the main control module. The signal transmitting module is connected to the sensor to detect changes in the signal intensity of the measured object in real time and capture the magnetic field and reflection distortion signals caused by the measured object. The signal receiving module is also connected to the sensor to amplify, filter, and digitize the sensor signal for easy processing by the MCU.

2. The instrument with wall inspection function according to claim 1, characterized in that: The instrument housing also contains a battery (7), which is then fixed to the housing (3) by adhesive after being installed.

3. The instrument with wall inspection function according to claim 1, characterized in that: According to claim 1, an instrument with wall inspection function is characterized in that: an anti-slip pad (9) is pasted on the rear wall of the rear housing (3).

4. The instrument with wall inspection function according to claim 1, characterized in that: An acrylic panel (1) is attached to the front wall of the front housing (2).

5. An instrument with wall inspection function according to claim 1, characterized in that: A buzzer electrically connected to the PCBA (6) is also fixed inside the front housing (2).

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