Remote detection device for rs485 wiring parameters

Abstract

This application relates to the field of communication bus monitoring technology and discloses an RS485 wiring parameter remote detection device, including a signal acquisition module, a main controller, a wireless transmission module, an alarm module, a human-machine interaction module, and a power management module. This RS485 wiring parameter remote detection device, through the signal acquisition module connected in parallel to the A and B lines of the RS485 bus, enables synchronous real-time monitoring of differential voltage, line current, and terminal impedance. It solves the problems of low efficiency and error accumulation caused by time-division measurement in traditional detection methods. The main controller's built-in binary diagnostic algorithm and relay matrix support rapid fault location. By recursively locking the fault range, the troubleshooting time is reduced from linear complexity to logarithmic level. The alarm module's audible and visual alarms and zone location functions enable remote maintenance response, reducing manual inspection costs. The overall design covers the entire link of data acquisition, analysis, communication, and interaction, forming a closed-loop detection system.

Description

Technical Field

[0001] This application relates to the field of communication bus monitoring technology, specifically an RS485 wiring parameter remote detection device. Background Technology

[0002] The RS485 bus is widely used in industrial control, smart instruments and other fields due to its strong anti-interference ability and support for multi-node communication.

[0003] However, long-distance cabling is susceptible to signal attenuation, impedance mismatch at the termination, and short / open circuits, leading to communication interruptions. Traditional testing methods rely on manual step-by-step measurement of differential voltage, current, and impedance, which is inefficient and cannot simultaneously acquire multiple parameters, easily leading to error accumulation. In existing technologies, testing devices require manual switching of the termination resistor or reliance on a single parameter to determine the fault. Manual troubleshooting requires segment-by-segment disconnection testing, which is time-consuming and affects system operation. To solve the above problems, an RS485 cabling parameter remote testing device is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides an RS485 wiring parameter remote detection device, which has advantages such as synchronous multi-parameter acquisition and rapid fault location, and solves the problems of low efficiency and long time consumption caused by time-division measurement in traditional detection.

[0005] To achieve the above objectives, this application provides the following technical solution: an RS485 wiring parameter remote detection device, including a signal acquisition module, a main controller, a wireless transmission module, an alarm module, a human-machine interaction module, and a power management module. The signal acquisition module is connected to the RS485 bus in parallel with the A and B lines, and can synchronously acquire differential voltage, line current, and terminal impedance.

[0006] The main controller has a built-in binary search diagnostic algorithm module and a relay matrix;

[0007] The alarm module uses a trigger-based audible and visual alarm, which can respond to the main controller's commands to trigger the audible and visual alarm and locate the faulty zone.

[0008] Through the above scheme, by connecting the signal acquisition module in parallel to the A and B lines of the RS485 bus, synchronous real-time monitoring of differential voltage, line current, and terminal impedance can be achieved. This solves the problems of low efficiency and error accumulation caused by time-division measurement in traditional detection. The binary diagnostic algorithm and relay matrix built into the main controller support rapid fault location. By recursively locking the fault range, the troubleshooting time is reduced from linear complexity to logarithmic level. The audible and visual alarm and zone location functions of the alarm module enable remote operation and maintenance response, reducing the cost of manual inspection. The overall design covers the entire link of data acquisition, analysis, communication, and interaction, forming a closed-loop detection system.

[0009] Furthermore, the signal acquisition module includes a differential amplifier circuit, a high-precision current sampling circuit, an impedance matching detection unit, and an opto-isolation unit.

[0010] The above scheme, through the differential amplifier circuit, can suppress common-mode interference and improve the accuracy of differential voltage measurement, making it suitable for noisy environments with long-distance RS485 lines. Through the high-precision current sampling circuit, μA-level current detection can be achieved to identify line short circuits or overload anomalies. Through the impedance matching detection unit, the impedance changes of the terminal can be dynamically monitored to prevent communication interruptions caused by signal reflection. Through the design of the opto-isolation unit, the RS485 bus is isolated from the internal circuit, preventing ground loop interference and surge damage to the equipment. This can improve anti-interference capability and measurement accuracy, and ensure data reliability.

[0011] Furthermore, the bisection diagnostic algorithm module switches branch lines via a relay matrix, and performs the following operations:

[0012] Send address commands to the relay matrix;

[0013] When a short-circuit current > 50mA or an open-circuit voltage < 0.5V is detected, the fault range is recursively locked.

[0014] Output the coordinates of the faulty node to the display area and the cloud platform.

[0015] The above scheme, through the design of relay matrix switching branch lines, can realize line segmentation through physical switches, support non-intrusive detection, avoid the downtime risk of traditional line break detection, and optimize the bisection diagnostic algorithm module to recursively lock the fault range and reduce troubleshooting time.

[0016] Furthermore, the wireless transmission module integrates a satellite communication chip, supporting short message pass-through.

[0017] By integrating a satellite communication chip into the wireless transmission module, the limitations of environments without public networks can be overcome, achieving full coverage.

[0018] Furthermore, the main controller's pre-stored protocol library includes Modbus RTU and PPI protocols.

[0019] The above solution, through the multi-protocol compatibility design of the main controller, can realize line segmentation through physical switches, support non-intrusive detection, avoid the downtime risk of traditional line break detection, automatically switch protocols according to bus device type, reduce user operation complexity, adapt to mainstream industrial equipment, and reduce deployment costs.

[0020] Furthermore, the human-computer interaction module includes an LCD partitioned display screen, a dual-color LED array, and a buzzer alarm mode. The LCD partitioned display screen includes a topology map area, a parameter table area, and a fault code area, which can be displayed in partitions.

[0021] The above scheme allows for zoned display by setting up a map area, parameter table area, and fault code area. A dual-color LED array can distinguish between normal and alarm states by color, supporting long-distance visual alarms. A buzzer alarm mode can provide acoustic warnings: a single long beep indicates a serious fault, two short beeps indicate a protocol error, and intermittent beeps indicate a warning.

[0022] Furthermore, the differential amplifier circuit and high-precision current sampling circuit inside the signal acquisition module are encapsulated with epoxy resin.

[0023] The above solution, by using epoxy resin potting in the differential amplifier circuit and the high-precision current sampling circuit, can improve the circuit's moisture resistance and vibration resistance, enabling the device to adapt to harsh working conditions. In particular, the pre-reserved stress relief groove inside the potting cavity can prevent temperature cycling cracking.

[0024] Furthermore, the power management module has a built-in wide-voltage power supply and backup battery, and provides power to the signal acquisition module, main controller, wireless transmission module, alarm module and human-machine interaction module.

[0025] The above solution, by setting up a wide-voltage power supply, can adapt to industrial voltage fluctuations; by setting up backup batteries, it can ensure data storage during sudden power outages; it can ensure uninterrupted operation; and it can adapt to complex power grid environments.

[0026] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0027] This RS485 wiring parameter remote detection device, through a signal acquisition module connected in parallel to the A and B lines of the RS485 bus, enables synchronous real-time monitoring of differential voltage, line current, and terminal impedance. It solves the problems of low efficiency and error accumulation caused by time-division measurement in traditional detection. The main controller's built-in binary diagnostic algorithm and relay matrix support rapid fault location. By recursively locking the fault range, the troubleshooting time is reduced from linear complexity to logarithmic level. The alarm module's audible and visual alarms and zone location functions enable remote operation and maintenance response, reducing manual inspection costs. The overall design covers the entire link of data acquisition, analysis, communication, and interaction, forming a closed-loop detection system. Attached Figure Description

[0028] Figure 1 This is a structural block diagram of the system architecture of this application;

[0029] Figure 2 This is a structural block diagram of the power management module in this application;

[0030] Figure 3 This is a block diagram of the main controller in this application;

[0031] Figure 4 This is a structural block diagram of the signal acquisition module in this application;

[0032] Figure 5 This is a structural block diagram of the software process in this application.

[0033] In the picture:

[0034] 1. Signal acquisition module; 101. Differential amplifier circuit; 102. High-precision current sampling circuit; 103. Impedance matching detection unit; 104. Opto-isolation unit;

[0035] 2. Main controller; 201. Binary search diagnostic algorithm module; 202. Relay matrix;

[0036] 3. Wireless transmission module;

[0037] 4. Alarm module;

[0038] 5. Human-computer interaction module; 501. LCD zone display screen; 502. Dual-color LED array; 503. Buzzer alarm mode;

[0039] 6. Power management module; 601. Wide voltage power supply; 602. Backup battery. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Please see Figure 1 , Figure 4 and Figure 5The RS485 wiring parameter remote detection device in this embodiment includes a signal acquisition module 1, a main controller 2, a wireless transmission module 3, an alarm module 4, a human-machine interaction module 5, and a power management module 6. The signal acquisition module 1 is connected to the RS485 bus via parallel connection of lines A and B, and can synchronously acquire differential voltage, line current, and terminal impedance. The main controller 2 has a built-in binary diagnostic algorithm module 201 and a relay matrix 202. The alarm module 4 uses a triggered audible and visual alarm, which can respond to commands from the main controller 2 to trigger an audible and visual alarm and locate the fault zone. It can also be connected to the RS485 bus via parallel connection of lines A and B of the signal acquisition module 1. This system achieves synchronous real-time monitoring of differential voltage, line current, and terminal impedance, solving the problems of low efficiency and error accumulation caused by time-division measurement in traditional detection. The main controller 2's built-in binary diagnostic algorithm and relay matrix 202 support rapid fault location. By recursively locking the fault range, the troubleshooting time is reduced from linear complexity to logarithmic level. The alarm module 4's audible and visual alarms and zone location functions enable remote operation and maintenance response, reducing manual inspection costs. The overall design covers the entire link of data acquisition, analysis, communication, and interaction, forming a closed-loop detection system. The signal acquisition module 1 includes a differential amplifier circuit 101 and a high-precision current sampling circuit 102. The impedance matching detection unit 103 and opto-isolation unit 104, through the differential amplifier circuit 101, can suppress common-mode interference and improve the accuracy of differential voltage measurement, making them suitable for noisy environments in long-distance RS485 lines. The high-precision current sampling circuit 102 enables μA-level current detection, identifying line short circuits or overload anomalies. The impedance matching detection unit 103 dynamically monitors terminal impedance changes, preventing communication interruptions caused by signal reflections. The opto-isolation unit 104 isolates the RS485 bus from internal circuits, preventing ground loop interference and surge damage to the equipment, thus improving anti-interference capabilities and measurement accuracy, and ensuring data reliability. The binary search diagnostic algorithm module 201 switches branch lines via relay matrix 202. The module performs the following operations: sending address commands to relay matrix 202; recursively locking the fault range when a short-circuit current > 50mA or an open-circuit voltage < 0.5V is detected; and outputting the fault node coordinates to the display area and cloud platform. The design of switching branch lines via relay matrix 202 allows for line segmentation through physical switches, supporting non-intrusive detection and avoiding the downtime risks associated with traditional open-circuit detection. Through optimization of the binary search diagnostic algorithm in the module 201, the fault range can be recursively locked, reducing troubleshooting time.

[0042] Please see Figure 1 and Figure 3The wireless transmission module 3 integrates a satellite communication chip, supporting short message pass-through. By integrating the satellite communication chip into the wireless transmission module 3, the limitation of no public network environment can be overcome to achieve full coverage. The main controller 2 has a pre-stored protocol library including Modbus RTU and PPI protocols. Through the multi-protocol compatibility design of the main controller 2, line segmentation can be achieved through physical switches, supporting non-intrusive detection and avoiding the downtime risk of traditional line breakage detection. It can automatically switch protocols according to the bus device type, reducing the complexity of user operation, and can be adapted to mainstream industrial equipment, reducing deployment costs.

[0043] Please see Figure 1 and Figure 3 The human-machine interaction module 5 includes an LCD partitioned display screen 501, a dual-color LED array 502, and a buzzer alarm mode 503. The LCD partitioned display screen 501 includes a topology map area, a parameter table area, and a fault code area, which can be displayed in partitions. The dual-color LED array 502 distinguishes between normal and alarm states by color and supports long-distance visual alarms. The buzzer alarm mode 503 provides audible warnings: a single long beep indicates a serious fault, two short beeps indicate a protocol error, and intermittent beeps indicate a warning. The signal acquisition module 1 contains a differential amplifier circuit 101 and a high-precision current sampling circuit 102. The device employs epoxy resin potting. By potting the differential amplifier circuit 101 and the high-precision current sampling circuit 102 with epoxy resin, the circuit's moisture resistance and vibration resistance can be improved, enabling the device to adapt to harsh working conditions. The potting cavity has a pre-reserved stress relief groove to prevent temperature cycling cracking. The power management module 6 has a built-in wide-voltage power supply 601 and a backup battery 602, which power the signal acquisition module 1, the main controller 2, the wireless transmission module 3, the alarm module 4, and the human-machine interaction module 5. By setting the wide-voltage power supply 601, it can adapt to industrial voltage fluctuations. By setting the backup battery 602, it can ensure data storage in the event of a sudden power outage, ensuring uninterrupted operation and adapting to complex power grid environments.

[0044] In this embodiment, by connecting the signal acquisition module 1 in parallel to the A and B lines of the RS485 bus, synchronous real-time monitoring of differential voltage, line current, and terminal impedance can be achieved. This solves the problems of low efficiency and error accumulation caused by time-division measurement in traditional detection. The binary diagnostic algorithm and relay matrix 202 built into the main controller 2 support rapid fault location. By recursively locking the fault range, the troubleshooting time is reduced from linear complexity to logarithmic level. The audible and visual alarm and zone location functions of the alarm module 4 can realize remote operation and maintenance response and reduce the cost of manual inspection. The overall design covers the entire link of data acquisition, analysis, communication, and interaction, forming a closed-loop detection system.

[0045] The working principle of the above embodiments is as follows:

[0046] In use, the signal acquisition module 1 is connected in parallel to RS485 bus lines A and B. Then, the voltage and current are synchronously acquired through the differential amplifier circuit 101 and the high-precision current sampling circuit 102. Through the impedance matching detection unit 103, the change of terminal resistance can be dynamically monitored. After real-time monitoring, the main controller 2 starts the binary search algorithm to control the relay matrix 202 to switch the line in segments. When the short circuit current is detected to be >50mA or the open circuit voltage is <0.5V, the normal range can be recursively eliminated, and then the faulty branch is locked. After locking, the fault coordinates are uploaded to the cloud through the wireless transmission module 3. The topology map, fault code and real-time parameters are displayed in sections through the LCD partition display screen 501. Finally, the buzzer and LED flashing are triggered by the alarm module 4.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. RS485 wiring parameter remote detection device, comprising signal acquisition module (1), main controller (2), wireless transmission module (3), alarm module (4), man-machine interaction module (5) and power management module (6), characterized in that: The signal acquisition module (1) is connected to the RS485 bus in parallel with the A line and B line, and can synchronously acquire differential voltage, line current and terminal impedance; The main controller (2) has a built-in binary search diagnostic algorithm module (201) and a relay matrix (202). The alarm module (4) uses a triggering sound and light alarm, which can respond to the instructions of the main controller (2), trigger the sound and light alarm and locate the fault zone.

2. The RS485 wiring parameter remote detection device according to claim 1, characterized in that: The signal acquisition module (1) includes a differential amplifier circuit (101), a high-precision current sampling circuit (102), an impedance matching detection unit (103), and an opto-isolation unit (104).

3. The RS485 wiring parameter remote detection device according to claim 1, characterized in that: The bisection diagnostic algorithm module (201) switches branch lines through a relay matrix (202), and the bisection diagnostic algorithm module (201) performs the following operations; Send an address command to the relay matrix (202); When a short-circuit current > 50mA or an open-circuit voltage < 0.5V is detected, the fault range is recursively locked. Output the coordinates of the faulty node to the display area and the cloud platform.

4. The RS485 wiring parameter remote detection device of claim 1, wherein: The wireless transmission module (3) integrates a satellite communication chip and supports short message pass-through.

5. The RS485 wiring parameter remote detection device according to claim 1, characterized in that: The main controller (2) has a pre-stored protocol library including Modbus RTU and PPI protocols.

6. The RS485 wiring parameter remote detection device according to claim 1, characterized in that: The human-computer interaction module (5) includes an LCD partition display screen (501), a dual-color LED array (502), and a buzzer alarm mode (503). The LCD partition display screen (501) includes a topology map area, a parameter table area, and a fault code area, which can be displayed in partitions.

7. The RS485 wiring parameter remote detection device according to claim 1, characterized in that: The differential amplifier circuit (101) and high-precision current sampling circuit (102) inside the signal acquisition module (1) are encapsulated with epoxy resin.

8. The RS485 wiring parameter remote detection device according to claim 1, characterized in that: The power management module (6) has a built-in wide voltage power supply (601) and a backup battery (602), and provides power to the signal acquisition module (1), the main controller (2), the wireless transmission module (3), the alarm module (4) and the human-machine interaction module (5).

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