CN218567465U - Multi-channel current and voltage acquisition device for ground loop fault diagnosis - Google Patents

Abstract

The utility model aims to solve the technical problem that a multichannel current-voltage collection system for ground connection circulation fault diagnosis who gathers cable operating parameter comprehensively, discovers the problem fast, effectively improves fortune dimension ageing, is convenient for the tester to carry out preliminary judgement to field fault is provided. The device includes the ARM MCU chip, the FPGA chip, the GPS module, the wireless communication module, touch display screen, the EMMC memory, a power supply, 16 passageway analog-to-digital converter, 16 signal processing circuits, 10 current sensor, 3 voltage sensor, 3 temperature sensor, the device can realize the comprehensive collection of cable operating parameter, can carry out the automatic measure of data, calculate, avoid the error that manual measurement produced, effectively improve the accuracy of data, it is convenient to lay, improve the efficiency of software testing, can also extend the application range of device, be fit for popularizing and applying in the on-line monitoring technology field.

Description

Multi-channel current and voltage acquisition device for ground loop fault diagnosis

Technical Field

The utility model relates to an on-line monitoring technical field, concretely relates to multichannel current-voltage collection system for ground connection circulation fault diagnosis.

Background

In the operation and maintenance process of underground pipe gallery power transmission and distribution lines, the parameter index of the ground circulation indicates the state of a pipeline sheath, the monitoring popularization coverage rate of the ground circulation is low at present, the construction is difficult to monitor for the reconstruction of the constructed power transmission and distribution pipe gallery, in order to eliminate the induced current of the cable sheath, the induced current is offset by adopting a sheath cross connection mode, and the induced current is connected to the ground at a corresponding position, so that the running parameters of the cable are increased, 3-phase main cable current needs to be acquired, 1-path sheath circulation is acquired at the left side and the right side of a sheath connection part respectively, 6 paths are acquired at the three-phase sheath connection part in total, 1-path grounding total current needs to be acquired at the grounding point, in addition, in order to facilitate later analysis, 3-path sheath voltage also needs to be acquired, 13-path signals need to be acquired in total, in order to keep the phase analysis of each path signal waveform, 13-path synchronous acquisition of channels needs to be performed, the temperature of the 3-phase cables needs to be monitored, the multichannel synchronous dynamic data acquisition instrument on the market is mostly designed in a general type, the requirement for acquiring the ground circulation fault diagnosis data on site, the on-site, the quick detection of the professional inspection or the detection of equipment is difficult to detect the current, and the problem of the professional life is difficult to detect the problem, and the problem sometimes, and the problem of the power failure is difficult to detect the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a multichannel current-voltage collection system for ground connection circulation fault diagnosis who gathers cable operating parameter comprehensively, discovers the problem fast, effectively improves fortune dimension ageing, is convenient for the tester to carry out preliminary judgement to field fault is provided.

The utility model provides a technical scheme that above-mentioned technical problem adopted is: the multi-channel current and voltage acquisition device for ground connection loop current fault diagnosis comprises an ARM MCU chip, an FPGA chip, a GPS module, a wireless communication module, a touch display screen, an EMMC memory, a power supply, a 16-channel analog-digital converter, 16 signal processing circuits, 10 current sensors, 3 voltage sensors and 3 temperature sensors;

the 10 current sensors, the 3 voltage sensors and the 3 temperature sensors are respectively connected with the input ends of the 16 signal processing circuits;

the output ends of the 16 signal processing circuits are respectively connected with 16 acquisition channels of the analog-digital converter;

the analog-digital converter and the GPS module are respectively connected with the FPGA chip, and the FPGA chip is connected with the ARM MCU chip;

the GPS module, the wireless communication module, the touch display screen and the EMMC memory are respectively connected with the ARM MCU chip;

the ARM MCU chip is at least provided with an RJ45 network port, an RS485 interface and a USB interface.

Furthermore, the FPGA chip is an FPGA chip with the model of XC6SLX9-2TQG 144C.

Further, the analog-to-digital converter is an analog-to-digital converter with model number AD 7616.

Furthermore, the GPS module adopts a GPS module with the model number of ATGM336H-5N 31.

Further, the ARM MCU chip adopts a single chip microcomputer with the model of STM32F407VET 6.

Further, the touch display screen adopts an LCD capacitive touch screen with 1024 x 768 resolution.

Further, the wireless communication module adopts a communication module with the model number of EC 200.

Further, the analog-to-digital converter adopts a 16-channel synchronous sampling ADC with the model number AD 7616.

The beneficial effects of the utility model are as follows:

1. data of 10 current sensors, 3 voltage sensors and 3 temperature sensors can be synchronously and dynamically acquired through the arranged 16-channel analog-digital converter, and comprehensive acquisition of cable operation parameters is realized.

2. The ARM MCU chip, the FPGA chip, the analog-digital converter, the 16 signal processing circuits, the 10 current sensors, the 3 voltage sensors and the 3 temperature sensors are used for automatically measuring and calculating data, so that errors caused by manual measurement are avoided, and the accuracy of the data is effectively improved.

3. During installation, the sensor is only required to be clamped into a corresponding cable, the arrangement is convenient, and the testing efficiency is improved.

4. Can expand through the RS485 interface that sets up and add other sensors, make it possess more functions, expand the application range of device, promote the utilization ratio of device.

Drawings

Fig. 1 is a schematic diagram of a frame structure of the multi-channel current and voltage collecting device for ground-fault diagnosis according to the present invention.

Detailed Description

The following description of the embodiments of the present invention with reference to the drawings is intended to illustrate the embodiments of the present invention and, therefore, should not be construed as limiting the scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that all directional indication terms in the embodiments of the present application, such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention, and are only used for explaining the relative positional relationships among the components, the movement conditions, etc., in a specific posture, and if the specific posture is changed, the directional indication is also changed accordingly.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

As shown in fig. 1, the multi-channel current and voltage collecting device for ground loop fault diagnosis includes an ARM MCU chip, an FPGA chip, a GPS module, a wireless communication module, a touch display screen, an EMMC memory, a power supply, a 16-channel analog-to-digital converter, 16 signal processing circuits, 10 current sensors, 3 voltage sensors, and 3 temperature sensors, where the power supply is used to provide electric energy for each component to enable the component to normally work as the prior art, and no detailed description is given, the 16-channel analog-to-digital converter has 1-16 independent collecting channels, the 1-10 channels are configured as rogowski coil sensor channels for measuring sheath current, sheath ground current, and main cable current, the 11-13 channels are configured as sheath voltage channels, and the 14-16 channels are configured as temperature sensor measuring channels for temperature monitoring of a, B, and C3 phase cables; 10 current sensors are respectively devices CH1, CH2, CH3, CH4, CH5, CH6, CH7, CH8, CH9 and CH10, 10 current sensors adopt Rogowski coil sensors, 3 voltage sensors are respectively devices CH11, CH12 and CH13,3 voltage sensors can adopt voltage probes, and 3 temperature sensors are respectively devices CH14, CH15 and CH16;

the 10 current sensors, 3 voltage sensors and 3 temperature sensors are respectively connected with the input ends of the 16 signal processing circuits, that is, the 10 current sensors CH1, CH2, CH3, CH4, CH5, CH6, CH7, CH8, CH9 and CH10 are respectively connected with the acquisition channel 1, the acquisition channel 2, the acquisition channel 3, the acquisition channel 4, the acquisition channel 5, the acquisition channel 6, the acquisition channel 7, the acquisition channel 8, the acquisition channel 9 and the acquisition channel 10 of the analog-digital converter in a one-to-one manner, the 10 current sensors CH1, CH2, CH3, CH4, CH5, CH6, CH7, CH8, CH9 and CH10 are respectively used for acquiring the current of the 3-phase main cable, the sheath loop currents at the left side and the right side of the sheath connection of the 3-phase main cable, and the ground current at the ground point, the current signals of the 3-phase main cable are 3, the loop currents at the left side and the right side of the sheath connection of the 3-phase main cable are 2 × 3 ground points, the ground signal is 1, and the current signals are 10 in total; the 3 voltage sensors CH11, CH12 and CH13 are respectively connected with the acquisition channel 11, the acquisition channel 12 and the acquisition channel 13 in a one-to-one manner, and the 3 voltage sensors CH11, CH12 and CH13 are used for respectively acquiring 3-path sheath voltage; the 3 temperature sensors are respectively CH14, CH15 and CH16 and are respectively in one-to-one connection with the acquisition channel 14, the acquisition channel 15 and the acquisition channel 16, and the 3 temperature sensors are respectively CH14, CH15 and CH16 and are used for monitoring the temperature of the 3-phase cable;

the output ends of the 16 signal processing circuits are respectively connected with 16 acquisition channels of the analog-digital converter, each signal processing circuit is used for converting and adjusting the signals of the correspondingly connected sensors into signals which can be acquired by the analog-digital converter, and the analog-digital converter is used for dynamically and synchronously acquiring the signals which are converted and adjusted by the 16 signal processing circuits;

the FPGA chip is connected with the ARM MCU chip, the analog-digital converter transmits 16 acquired communication data signals to the FPGA chip, the FPGA chip analyzes and processes the acquired data and transmits the processed data to the ARM MCU chip, the ARM MCU chip displays the data analyzed and processed by the FPGA on a touch display screen, meanwhile, waveform display is carried out on the basis of the same coordinate system, and data such as current, voltage amplitude, phase difference of each phase, load ratio, total ground current value, temperature and the like are listed, so that a tester can conveniently and primarily judge field faults, and the ARM MCU chip stores the data analyzed and processed by the FPGA through an EMMC memory to facilitate subsequent retrieval and viewing;

the GPS module, the wireless communication module, the touch display screen and the EMMC memory are respectively connected with the ARM MCU chip;

the ARM MCU chip is provided with an RJ45 net gape, RS485 interface, USB interface at least, also is that the quantity of RJ45 net gape, RS485 interface, USB interface three is more than or equal to 1 respectively, RJ45 net gape, RS485 interface are used for wired communication, and wherein other sensors can also be inserted to RS485 interface, like gas sensor, level sensor etc. expand the application range of device, the monitoring data can directly be derived to the USB interface, the centralized analysis of being convenient for.

In this embodiment, preferably, the FPGA chip is an FPGA chip of a type XC6SLX9-2TQG144C, and the FPGA chip is configured to perform waveform amplitude extraction, phase extraction, and acquisition of high-precision GPS clock second pulse and synchronization time.

In the embodiment, the GPS module is preferably a GPS module with a model number ATGM336H-5N31, and the GPS module is used for providing UTC time and PPS pulse signals required by the device.

In this embodiment, preferably, the ARM MCU chip is a single chip microcomputer of the type STM32F407VET6, and is configured to display data analyzed by the FPGA through a touch display screen, and display waveforms based on the same coordinate system, and display data such as current, voltage amplitude, phase difference of each phase, duty ratio, total ground current value, and temperature.

In this embodiment, preferably, the touch display screen is an LCD capacitive touch screen with a resolution of 1024 × 768, and the touch display screen is used for data display and parameter configuration to implement a human-computer interaction function.

In this embodiment, preferably, the wireless communication module is a communication module with a model number of EC200, and the communication module is compatible with 2G, 3G, and 4G networks of three operators, namely mobile, telecommunication, and unicom; the wireless communication module is used for returning and collecting analysis results, remotely setting parameters and checking historical records.

In this embodiment, it is preferable that the analog-to-digital converter employs a 16-channel synchronous sampling ADC of model AD 7616. The analog-digital converter can ensure the sampling synchronism of each path of signal, and is convenient for phase analysis.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims (8)

1. A multichannel current-voltage collection system for ground connection circulation fault diagnosis, its characterized in that: the system comprises an ARM MCU chip, an FPGA chip, a GPS module, a wireless communication module, a touch display screen, an EMMC memory, a power supply, a 16-channel analog-digital converter, 16 signal processing circuits, 10 current sensors, 3 voltage sensors and 3 temperature sensors;

the 10 current sensors, the 3 voltage sensors and the 3 temperature sensors are respectively connected with the input ends of the 16 signal processing circuits;

the output ends of the 16 signal processing circuits are respectively connected with 16 acquisition channels of the analog-digital converter;

the analog-digital converter and the GPS module are respectively connected with the FPGA chip, and the FPGA chip is connected with the ARM MCU chip;

the GPS module, the wireless communication module, the touch display screen and the EMMC memory are respectively connected with the ARM MCU chip;

the ARM MCU chip is at least provided with an RJ45 network port, an RS485 interface and a USB interface.

2. The multi-channel current and voltage collecting device for ground circulation fault diagnosis according to claim 1, wherein: the FPGA chip adopts an FPGA chip with the model of XC6SLX9-2TQG 144C.

3. The multi-channel current and voltage collecting device for ground circulation fault diagnosis according to claim 1, wherein: the analog-digital converter adopts an analog-digital converter with the model number AD 7616.

4. The multi-channel current and voltage collecting device for earth-circulation fault diagnosis according to claim 1, wherein: the GPS module adopts a GPS module with the model number of ATGM336H-5N 31.

5. The multi-channel current and voltage collecting device for earth-circulation fault diagnosis according to claim 1, wherein: the ARM MCU chip adopts a singlechip with the model of STM32F407VET 6.

6. The multi-channel current and voltage collecting device for ground circulation fault diagnosis according to claim 1, wherein: the touch display screen adopts an LCD capacitive touch screen with 1024 x 768 resolution.

7. The multi-channel current and voltage collecting device for earth-circulation fault diagnosis according to claim 1, wherein: the wireless communication module adopts a communication module with the model number of EC 200.

8. The multi-channel current and voltage collecting device for ground circulation fault diagnosis according to claim 1, wherein: the analog-digital converter adopts a 16-channel synchronous sampling ADC with the model number of AD 7616.

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