Multifunctional current measuring equipment capable of being conveniently combined and used

Abstract

The utility model relates to a multifunctional current measuring device which can be conveniently combined for use. An existing current measuring mode is an ampere meter and a universal meter. The problems that the current value cannot be wirelessly and remotely sent, no fuse protection exists, or the fuse is not easy to replace exist. The device comprises a housing, a circuit board A, a circuit board B, a wiring terminal, a fuse holder, an LED indicating lamp, a USB interface, an antenna and the like, two sides of the housing are provided with grooves and mounting holes which are convenient for combination of a plurality of devices, the housing is internally provided with the circuit board A and the circuit board B, and a panel of the housing is provided with fixing screws, the fuse holder, the LED indicating lamp, the USB interface, an antenna pedestal, a touch switch and the wiring terminal. A top cover with a dismounting groove is arranged at the top end of the fuse seat; and the antenna is screwed on the antenna pedestal. Current data can be wirelessly transmitted, a fuse can be easily replaced on an equipment panel, automatic range switching can be realized, and a plurality of equipment with the same shell structure can be conveniently combined for use.

Description

Technical Field

[0001] The utility model relates to the technical field of current measuring equipment, in particular to a current measuring equipment which is multifunctional and can be conveniently used in combination. Background Art

[0002] At present, the common way to measure current is to use ammeters and multimeters. These two methods have problems such as being unable to send the measured current value wirelessly to other devices, being unable to transmit the current value wirelessly over long distances, the ammeter not having fuse protection, and the multimeter fuse being difficult to replace. At the same time, the multimeter for measuring current needs to manually switch the range according to the measured value. If the range is switched incorrectly, the measured value will be inaccurate or even the multimeter will be damaged. Utility Model Content

[0003] The purpose of the utility model is to provide a multifunctional current measuring device that can be conveniently used in combination. The measured current value can be sent out through an antenna using the LoRa technology, and the sent data can be received and read using a device with a LoRa function; at the same time, the fuse can be easily replaced on the panel of the device; automatic range switching can be achieved, and the device can automatically switch to a suitable range through an internal switch according to the size of the measured value; and multiple devices with the same shell structure can be conveniently used in combination.

[0004] The utility model comprises a shell, a circuit board A, a circuit board B, a wiring terminal, a fuse holder, an LED indicator light, a USB interface, a touch switch, an antenna holder, and an antenna. The shell is a square body, and grooves are respectively arranged longitudinally from the top to the bottom in the middle of both sides of the shell. A horizontal plate and a combination mounting hole are arranged at the groove below the side of the shell, so that it is convenient to assemble multiple combination devices with the same shell structure with a connecting rod; two card slots are respectively arranged on the upper and lower sides of the shell, and the circuit board A and the circuit board B are inserted in the card slots, and the circuit board A and the circuit board B are connected by wires; a fuse holder and a wiring terminal are welded on the circuit board A, and a USB interface, an antenna holder, a touch switch, and an LED indicator light are welded on the circuit board B; the shell panel The panel is provided with fixing screw holes and fuse holder openings, LED indicator openings, USB interface openings, antenna holder openings, touch switch openings and terminal openings that match the fuse holder, LED indicator light, USB interface, antenna holder openings, touch switch openings and terminal openings. The fuse holder, LED indicator light, USB interface, antenna holder, touch switch and terminal openings are arranged in the shell cavity corresponding to the openings on the panel. There are two fuse holders, and fuses that can be easily installed and replaced are arranged in the fuse holders. A fuse holder top cover with a disassembly groove for convenient screwing is arranged on the top of the fuse holder. The antenna is screwed on the antenna holder, and the panel and the shell are fixed by fixing screws at the fixing screw holes.

[0005] The functions and working principles of each component and circuit in the utility model circuit are:

[0006] Antenna base: used to connect an external antenna to increase the strength of the receiving and transmitting signals;

[0007] Wireless transceiver circuit: responsible for receiving and sending wireless signals;

[0008] Encoding and decoding circuit: responsible for encoding and sending the data sent by the single-chip microcomputer and decoding the received data and transmitting it to the single-chip microcomputer;

[0009] USB interface: used for power supply and USB signal transmission;

[0010] Power supply voltage regulator circuit: responsible for stabilizing the input voltage to the appropriate voltage required for the microcontroller to work;

[0011] USB communication circuit: responsible for processing USB signal transmission to the microcontroller;

[0012] Touch switch: used for equipment reset operation;

[0013] LED indicator: used to indicate various status of the device;

[0014] Single chip microcomputer: responsible for data processing of each circuit module, such as processing the read current measurement data and transmitting it to the encoding and decoding circuit;

[0015] RTC clock circuit: used to provide real-time clock for the microcontroller;

[0016] Internal temperature monitoring circuit: responsible for detecting the internal temperature of the device shell;

[0017] Buzzer circuit: used for alarm, alarm sounds when data is abnormal;

[0018] Flash storage circuit: responsible for storing device information, read data, etc.;

[0019] Cable interface 1: used to connect circuit board A;

[0020] Cable interface 2: used to connect circuit board B;

[0021] Power isolation circuit: used to isolate the power supply of the measurement circuit and the mainboard to reduce interference;

[0022] Data isolation circuit: used to isolate the measurement circuit and the data of the main board to reduce interference;

[0023] Wiring terminal: used for users to connect external measured current;

[0024] Fuse holder: user-installed fuse, easy for user to replace. The fuse is responsible for protecting the measurement circuit from overload;

[0025] Range switching circuit: responsible for automatic range switching, which can automatically switch to the appropriate range according to the size of the measured value;

[0026] Current sampling circuit: responsible for converting the measured current signal into a voltage signal;

[0027] Operational amplifier circuit: responsible for amplifying weak voltage signals;

[0028] Analog-to-digital conversion circuit: responsible for converting the read voltage analog signal into a digital signal and transmitting it to the microcontroller through the data isolation circuit.

[0029] The advantages of this new device are that the measured current value can be sent wirelessly through the antenna, the fuse can be easily replaced on the device panel, automatic range switching can be achieved, and multiple devices with the same shell structure can be conveniently combined for use. It is simple to operate, easy to install, and conducive to promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0031] Figure 2 It is a schematic diagram of the structure of the components of the utility model in an exploded state;

[0032] Figure 3 This is a schematic diagram of the structure of the utility model in a top view;

[0033] Figure 4 It is a front structural schematic diagram of the utility model;

[0034] Figure 5 It is a schematic block diagram of the circuit principle of the utility model.

[0035] In the figure, 1 is the shell, 2 is the card slot, 3 is the groove, 4 is the horizontal plate and the combined mounting hole, 5 is the circuit board A, 6 is the circuit board B, 7 is the panel, 8 is the fixing screw, 9 is the USB interface, 10 is the antenna seat, 11 is the touch switch, 12 is the LED indicator light, 13 is the antenna, 14 is the wiring terminal, 15 is the fuse holder, 16 is the fuse holder opening, 17 is the LED indicator light opening, 18 is the USB interface opening, 19 is the antenna seat opening, 20 is the touch switch opening, 21 is the wiring terminal opening, 22 is the fuse holder top cover, 23 is the fuse, 24 is the disassembly groove, and 25 is the fixing screw hole. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings:

[0037] The utility model comprises a shell (1), a circuit board A (5), a circuit board B (6), a wiring terminal (14), a fuse holder (15), an LED indicator light (12), a USB interface (9), a touch switch (11), an antenna seat (10), and an antenna (13). The shell (1) is a square body, and grooves (3) are respectively arranged in the middle of two sides thereof from the top to the bottom longitudinally. A horizontal plate and a combination mounting hole (4) are arranged at the groove (3) at the bottom of the side of the shell (1), so as to facilitate the assembly of multiple combination devices with the same shell structure by using a connecting rod; two card slots (2) are respectively arranged at the upper and lower sides of the shell (1), and the circuit board A (5) and the circuit board B (6) are inserted in the card slots (2), and the circuit board A (5) and the circuit board B (6) are connected by a wire; the circuit board A (5) is welded with a fuse holder (15) and a wiring terminal (14), and the circuit board B (6) is welded with a USB interface (9), an antenna seat (10), a touch switch (11), and an LED indicator light (12); a fixing screw hole (4) is arranged on the panel of the shell (1) 25) and a fuse holder opening (16), an LED indicator opening (17), a USB interface opening (18), an antenna holder opening (19), a touch switch opening (20), a terminal opening (21) that matches the fuse holder (15), the LED indicator (12), the USB interface (9), the antenna holder (10), the touch switch (11), and the terminal (14), the fuse holder (15), the LED indicator (12), the USB interface (9), the antenna holder (10), the touch switch (11), and the terminal (14). The switch (11) and the connecting terminal (14) are arranged in the inner cavity of the housing (1) corresponding to the opening of the panel (7); there are two fuse holders (15), and fuses (23) that can be easily installed and replaced are arranged in the fuse holders (15); the top of the fuse holder (15) is provided with a fuse holder top cover (22) with a disassembly groove (24) that can be easily screwed; the antenna (13) is screwed on the antenna holder (10), and the panel (7) and the housing (1) are fixed by fixing screws (8) at the fixing screw holes (25).

[0038] The functions and working principles of each component and circuit in the utility model circuit are:

[0039] Antenna base: used to connect an external antenna to increase the strength of the receiving and transmitting signals;

[0040] Wireless transceiver circuit: responsible for receiving and sending wireless signals;

[0041] Encoding and decoding circuit: responsible for encoding and sending the data sent by the single-chip microcomputer and decoding the received data and transmitting it to the single-chip microcomputer;

[0042] USB interface: used for power supply and USB signal transmission;

[0043] Power supply voltage regulator circuit: responsible for stabilizing the input voltage to the appropriate voltage required for the microcontroller to work;

[0044] USB communication circuit: responsible for processing USB signal transmission to the microcontroller;

[0045] Touch switch: used for equipment reset operation;

[0046] LED indicator: used to indicate various status of the device;

[0047] Single chip microcomputer: responsible for data processing of each circuit module, such as processing the read current measurement data and transmitting it to the encoding and decoding circuit;

[0048] RTC clock circuit: used to provide real-time clock for the microcontroller;

[0049] Internal temperature monitoring circuit: responsible for detecting the internal temperature of the device shell;

[0050] Buzzer circuit: used for alarm, alarm sounds when data is abnormal;

[0051] Flash storage circuit: responsible for storing device information, read data, etc.;

[0052] Cable interface 1: used to connect circuit board A;

[0053] Cable interface 2: used to connect circuit board B;

[0054] Power isolation circuit: used to isolate the power supply of the measurement circuit and the mainboard to reduce interference;

[0055] Data isolation circuit: used to isolate the measurement circuit and the data of the main board to reduce interference;

[0056] Wiring terminal: used for users to connect external measured current;

[0057] Fuse holder: user-installed fuse, easy for user to replace. The fuse is responsible for protecting the measurement circuit from overload;

[0058] Range switching circuit: responsible for automatic range switching, which can automatically switch to the appropriate range according to the size of the measured value;

[0059] Current sampling circuit: responsible for converting the measured current signal into a voltage signal;

[0060] Operational amplifier circuit: responsible for amplifying weak voltage signals;

[0061] Analog-to-digital conversion circuit: responsible for converting the read voltage analog signal into a digital signal and transmitting it to the microcontroller through the data isolation circuit.

Claims

1. A multifunctional and conveniently combined current measuring device, characterized in that It comprises a housing (1), a circuit board A (5), a circuit board B (6), a wiring terminal (14), a fuse holder (15), an LED indicator light (12), a USB interface (9), a touch switch (11), an antenna holder (10), and an antenna (13). The housing (1) is a square body, and grooves (3) are arranged longitudinally from the top to the bottom in the middle of both sides of the housing (1). A horizontal plate and a combined mounting hole (4) are arranged at the grooves (3) at the bottom of the side of the housing (1); two card slots (2) are arranged on the upper and lower sides of the housing (1), and the circuit board A (5) and the circuit board B (6) are inserted in the card slots (2). The circuit board A (5) and the circuit board B (6) are connected by a wire. A fuse holder (15) and a wiring terminal (14) are welded on the circuit board A (5); a USB interface (9), an antenna seat (10), a touch switch (11), and an LED indicator light (12) are welded on the circuit board B (6); a fixing screw hole (25) and a fuse holder opening (16) matching the fuse holder (15), the LED indicator light (12), the USB interface (9), the antenna seat (10), the touch switch (11), and the wiring terminal (14), an LED indicator light opening (17), a USB interface opening (18), an antenna seat opening (19), a touch switch opening (20), and a wiring terminal (21) are provided on the panel of the housing (1). The panel (7) has a sub-opening (21), a fuse holder (15), an LED indicator light (12), a USB interface (9), an antenna seat (10), a touch switch (11), and a connection terminal (14) are arranged in the inner cavity of the housing (1) corresponding to the opening of the panel (7); there are two fuse holders (15), a fuse (23) which can be easily installed and replaced is arranged in the fuse holder (15), and a fuse holder top cover (22) with a disassembly groove (24) which can be easily screwed is arranged at the top of the fuse holder (15); the antenna (13) is screwed on the antenna seat (10), and the panel (7) and the housing (1) are fixed by fixing screws (8) at the fixing screw holes (25).

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