Charging signal testing tool

Abstract

The utility model provides a charging signal test tool. The structure of the tool comprises a housing, a rechargeable lithium battery, an intelligent control mainboard, a liquid crystal display module and an indicating lamp. A display screen of the liquid crystal display module is arranged on the surface of the shell, and the indicator lamp is arranged on the surface of the shell and below the display screen; the rechargeable lithium battery and the intelligent control mainboard are arranged in the shell; according to the utility model, the MCU on the intelligent control board on the signal detection tool triggers the communication units (the communication module, the SIM card and the antenna) to be powered on and started up, and after network searching detection, data is transmitted back to the MCU and displayed on the liquid crystal screen; the real signal receiving condition of the NB Internet of Things membrane meter is simulated, external equipment does not need to be connected, and network searching signal detection can be manually completed in real time and displayed on a liquid crystal screen. The tool is portable to carry, the signal intensity of the local environment can be accurately measured, the product response time is short, and the test is accurate.

Description

Technical Field

[0001] This utility model relates to the field of signal testing technology, and specifically provides a charging signal testing fixture. Background Technology

[0002] The remote meter reading system collects and measures gas consumption via remote gas meters. During data collection, the collector gathers gas data through the meter head collector, RS485, and MBUS bus in the remote meter, processes and stores the data, and then uploads it to the concentrator via a wireless data transmission module. The concentrator's main function is to collect the data uploaded by each collector and then upload it to the meter reading system's monitoring center via GPRS and CDMA. When meter reading is required, the computer at the monitoring center issues a collection command. Upon receiving the command, the collector forwards it to all collectors. The meter head collector, upon receiving the command, determines whether it is a command intended for a terminal and sends the data stored on the meter head collector back to the monitoring center, thus achieving remote meter reading.

[0003] Testing signal strength via mobile phone can only provide a simple indication of strength or weakness, and existing testing instruments are complex in structure and expensive. Utility Model Content

[0004] The signal testing fixture transmits telecommunications / mobile signals, which connect to the mobile / telecommunications operator's network via a telecommunications / mobile NB-IoT base station. During the network connection process, the signal condition can be analyzed based on the RSRP, SNR, and ECL values ​​returned by the operator's network.

[0005] RSRP (Signal Received Power): All values ​​are negative, ranging from -44 to -140 dBm. The higher the value, the better.

[0006] SNR (Signal-to-Noise Ratio): Positive and negative values ​​are both possible, and the higher the better.

[0007] ECL (Coverage Registration): The typical values ​​are 0 (regular coverage), 1 (extended coverage), and 2 (extreme coverage).

[0008] Based on testing experience, the optimal values ​​for NB signals are: RSRP above -90, SNR above 10, and ECL of 0.

[0009] The technical objective of this utility model is to provide a charging signal testing fixture to address the aforementioned problems.

[0010] A charging signal testing fixture, the fixture comprising a housing, a rechargeable lithium battery, a smart control motherboard, an LCD display module, and indicator lights;

[0011] The display screen of the liquid crystal display module is disposed on the surface of the housing, and the indicator light is disposed on the surface of the housing 1, below the display screen;

[0012] The rechargeable lithium battery and the intelligent control motherboard are located inside the casing.

[0013] The intelligent control motherboard is equipped with an NB communication circuit, an MCU microcontroller, a Bluetooth module, and a voltage conversion module;

[0014] The NB communication circuit includes an NB IoT communication module, a SIM card, and an antenna 4;

[0015] The rechargeable lithium battery is connected to the MCU microcontroller, NB IoT communication module, SIM card, Bluetooth module and LCD display module respectively through a voltage conversion module to provide power to them.

[0016] Furthermore, the NB communication circuit uses the BC26 communication chip.

[0017] Furthermore, the MCU microcontroller uses the GD32E230C8T6 chip.

[0018] Furthermore, the voltage conversion module uses an SGM2019-3.3V voltage regulator chip to convert the rechargeable lithium battery voltage to 3.3V for use by the MCU microcontroller, NB IoT communication module, SIM card, Bluetooth module, and LCD display module.

[0019] Furthermore, the Bluetooth module is a BF10-A chip.

[0020] The BF10-A chip is mainly used in short-range wireless data transmission. It can be easily connected to Bluetooth devices such as PCs (PDAs and mobile phones), and can also exchange data between the two modules, avoiding cumbersome cable connections.

[0021] Furthermore, the intelligent control motherboard also includes a charging module.

[0022] The SIM card includes China Telecom cards, China Mobile cards, and China Unicom cards.

[0023] Compared with the prior art, the charging signal testing fixture of this utility model has the following outstanding advantages:

[0024] This invention powers on the communication unit (communication module, SIM card, antenna) via an MCU on the intelligent control board of the signal detection fixture. After network search and detection, the data is transmitted back to the MCU and displayed on the LCD screen. By simulating the real signal reception of an NB-IoT membrane meter, network search and signal detection can be manually completed instantly without connecting to external devices, and the results are displayed on the LCD screen. The fixture is portable, can accurately measure the signal strength of the local environment, and offers fast response time and accurate testing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the signal testing fixture of this utility model;

[0026] Figure 2 This is a circuit diagram of the intelligent control motherboard;

[0027] Figure 3 This is a diagram showing the components and pinout of the peripheral circuit for the GD32E230C8T6 chip.

[0028] Figure 4 This is a diagram showing the components and pinout of the peripheral circuit of the BC26 communication chip.

[0029] Figure 5 This is a diagram showing the components and pinout of the peripheral circuit for the SGM2019-3.3V voltage regulator chip.

[0030] Figure 6 This is a diagram showing the components and pinout of the peripheral circuit of the BF10-A chip. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0032] like Figure 1 As shown, a charging signal testing fixture includes a housing 1, a rechargeable lithium battery, a smart control motherboard, an LCD display module, and indicator lights 3 (Bluetooth, charging, etc.).

[0033] The display screen 2 of the liquid crystal display module is disposed on the surface of the housing 1, and the indicator light 3 is disposed on the surface of the housing 1, below the display screen 2;

[0034] The rechargeable lithium battery and the intelligent control motherboard are located inside the outer casing 1.

[0035] like Figure 2 As shown, the intelligent control motherboard is equipped with an NB communication circuit, an MCU microcontroller, a Bluetooth module, and a voltage conversion module;

[0036] The NB communication circuit includes an NB IoT communication module, a SIM card, and an antenna 4;

[0037] The rechargeable lithium battery is connected to the MCU microcontroller, NB IoT communication module, SIM card, Bluetooth module and LCD display module respectively through a voltage conversion module to provide power to them.

[0038] like Figure 4 As shown, the NB communication circuit uses the BC26 communication chip, which is a high-performance, low-power NB-IoT wireless communication module. Due to its compact size, ultra-low power consumption and ultra-wide operating temperature range, the BC26 communication chip has become an ideal choice in the field of M2M applications. It is often used in wireless meter reading, smart cities, security, asset tracking, smart home appliances, agriculture and environmental monitoring, as well as many other industries, to provide comprehensive SMS and data transmission services.

[0039] like Figure 3 As shown, the MCU microcontroller uses the GD32E230C8T6 chip. The GD32E230C8T6 chip is a core-based 32-bit general-purpose microcontroller that provides high performance while offering high energy efficiency for MCUs and embedded applications with compact design requirements. Through its small yet powerful instruction set and extensive optimization, it provides high-end processing hardware, resulting in high energy efficiency.

[0040] like Figure 5 As shown, the voltage conversion module uses an SGM2019-3.3V voltage regulator chip to convert the battery voltage to 3.3V for use by the MCU microcontroller, NB IoT communication module, SIM card, Bluetooth module, and LCD display module.

[0041] The Bluetooth module uses the BF10-A chip.

[0042] like Figure 6 As shown, the BF10-A chip is mainly used in the field of short-range wireless data transmission. It can be easily connected to Bluetooth devices of PCs (PDAs and mobile phones), and can also exchange data between the two modules, avoiding cumbersome cable connections.

[0043] The intelligent control motherboard also includes a charging module.

[0044] The SIM card includes China Telecom cards, China Mobile cards, and China Unicom cards. By selecting different SIM cards, you can test the signal strength of China Telecom, China Mobile, or China Unicom.

[0045] The device connects to a dedicated mobile app via Bluetooth. Signal detection commands are sent through the mobile app, and the MCU on the intelligent control motherboard recognizes the commands, powering on the communication module to perform network search and obtain local signal values. The MCU then transmits the data back to the mobile phone for display.

[0046] Log in to the APP on your mobile phone, enter your account and password, enter the Operation and Maintenance - Signal Detection interface, click "Connect Tool", when the Bluetooth indicator light turns green, it means that the APP and the tool are successfully connected; then click "Start Acquiring Signal", and after a while the local signal value will be displayed on the screen; finally click "Upload Data" to save the record.

[0047] The embodiments described above are merely preferred embodiments of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution should be included within the protection scope of this utility model.

Claims

1. A charging signal testing fixture, characterized in that, The fixture structure includes a housing (1), a rechargeable lithium battery, a smart control motherboard, an LCD display module, and indicator lights (3); the display screen (2) of the LCD display module is located on the surface of the housing (1), and the indicator lights (3) are located on the surface of the housing (1) and below the display screen (2); the rechargeable lithium battery and the smart control motherboard are located inside the housing (1); the smart control motherboard includes an NB communication circuit, an MCU microcontroller, a Bluetooth module, and a voltage conversion module; the NB communication circuit includes an NB IoT communication module, a SIM card, and an antenna (4); the rechargeable lithium battery is connected to the MCU microcontroller, the NB IoT communication module, the SIM card, the Bluetooth module, and the LCD display module respectively through the voltage conversion module to supply power to them; during operation, the MCU microcontroller triggers the NB communication circuit to power on and perform network search detection, and then the detection data is sent back to the MCU microcontroller and displayed on the display screen (2) of the LCD display module.

2. The charging signal testing fixture according to claim 1, characterized in that: The NB communication circuit uses the BC26 communication chip.

3. The charging signal testing fixture according to claim 1, characterized in that: The MCU microcontroller used is the GD32E230C8T6 chip.

4. The charging signal testing fixture according to claim 1, characterized in that: The voltage conversion module uses the SGM2019-3.3V voltage regulator chip to convert the rechargeable lithium battery voltage to 3.3V for use by MCU microcontrollers, NB IoT communication modules, SIM cards, Bluetooth modules, and LCD display modules.

5. The charging signal testing fixture according to claim 1, characterized in that: The Bluetooth module is a BF10-A chip.

6. A charging signal testing fixture according to any one of claims 1 to 5, characterized in that: The intelligent control motherboard also includes a charging module.

7. The charging signal testing fixture according to claim 6, characterized in that: The SIM card includes China Telecom cards, China Mobile cards, and China Unicom cards.

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