CN219285300U - Portable fault detector - Google Patents

Abstract

The application provides a portable fault detector, which comprises a data acquisition board card, a data analysis board card and a display screen; the data acquisition board is a data acquisition board acquired by a frequency converter or a data acquisition board acquired by a motor, and the data acquisition board acquired by the frequency converter and the data acquisition board acquired by the motor can be switched in a pluggable manner; the data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires and integrated; the input end of the data acquisition board card is connected with the frequency converter or the motor, the output end of the data acquisition board card is connected with the input end of the data analysis board card, and the output end of the data analysis board card is connected with the input end of the display screen.

Description

Portable fault detector

Technical Field

The application relates to the field of industrial control, in particular to a portable fault detector.

Background

The frequency converter and the motor are mainly applied to common industrial equipment in the field of industrial control, wherein the frequency converter is power control equipment which applies frequency conversion technology and microelectronic technology to control an alternating current motor by changing the working power supply frequency of the motor, and the motor is equipment for converting electric energy into mechanical energy. Therefore, if these technical equipments fail, the smooth operation of the industrial production line is hindered, and the industrial production line is greatly affected.

In the related art, technical equipment such as a frequency converter and a motor are often detected regularly to determine whether the running state is normal or not, and early warning prompt is carried out when the running state is abnormal, so that on one hand, workers can maintain the equipment by reasonably arranging time by utilizing the clearance of production tasks before the equipment cannot run thoroughly due to faults, thereby effectively reducing the risk of unexpected stagnation of an industrial manufacturing production line caused by unexpected downtime of the equipment, and indirectly improving productivity and product quality. On the other hand, staff can detect each operation parameter of the equipment immediately, so that the fault position can be positioned quickly, the equipment can be maintained conveniently, and the influence on the production line caused by equipment faults is effectively reduced.

In terms of current domestic and foreign application trends, most fault detection for industrial equipment is mainly implemented by respectively installing fault detection modules inside each module of the industrial equipment:

for example, fault detection modules are respectively installed in several key modules of rectification (alternating current-to-direct current), filtering, inversion (direct current-to-alternating current), braking unit, driving unit, detection unit and micro-processing unit in the frequency converter, fault detection is respectively carried out on the corresponding key modules by the fault detection modules, and the fault detection modules form a fault detection system of the frequency converter. The method has at least the following technical problems:

1) The fault detection system integrated inside the industrial equipment is mainly used for adjusting the working state of the equipment. Therefore, under the trade-off of cost and application environment, some devices only keep the most basic fault detection, for example, three-phase current output of some foreign annunciators only detects two phases, which can lead to incomplete data obtained by fault detection;

2) The detection data detected by the fault detection system integrated in the industrial equipment is generally limited in the industrial equipment and cannot be disclosed, often, a microprocessor in the industrial equipment directly acquires the detection data and directly judges and processes the detection data, and if the running state is judged to be abnormal, the early warning prompt is only carried out. Therefore, the user cannot clearly know the fault data in the detection data, and inconvenience is brought to the user in locating the fault position of the industrial equipment;

3) The detection data in the industrial equipment of different brands are not universal, and various brands of industrial equipment often exist on the production line of large-scale production enterprises, so that the detection data in the industrial equipment of the same type of different brands are not uniform, and the working state of the industrial equipment is difficult to know;

in order to overcome the defects in the related art, a manner of externally connecting a set of fixed fault detection equipment on an industrial manufacturing line to perform fault detection on industrial equipment is also disclosed in the related art, and the fault detection equipment has high use cost. In view of this, the applicant filed a solution with application number of cn202111037160.X at 2021, 09 and 06, and the utility model is a frequency converter detection system and method to solve the above-mentioned shortcomings. However, the inventors have further found that the following technical problems exist in the above-described scheme:

the detection objects of the external fault detection equipment in the related technology are single, the requirements on the use sites are high, and the performance of the fault detection equipment cannot be volatilized from distribution due to the limitation of the sites.

Disclosure of Invention

An object of the present application is to provide a portable fault detector, which is at least used for solving the technical problems that the detection object of the fault detection device in the related art is single, the requirement on the use field is high, and the performance of the fault detection device cannot be volatilized from distribution due to the limitation of the field.

Some embodiments of the present application provide a portable fault detector that includes a data acquisition board, a data analysis board, and a display screen;

the data acquisition board is a data acquisition board acquired by a frequency converter or a data acquisition board acquired by a motor, and the data acquisition board acquired by the frequency converter and the data acquisition board acquired by the motor can be switched in a pluggable manner; the data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires and integrated;

the input end of the data acquisition board card is connected with the frequency converter or the motor, the output end of the data acquisition board card is connected with the input end of the data analysis board card, and the output end of the data analysis board card is connected with the input end of the display screen.

Compared with the prior art, the portable fault detector provided by the embodiment of the application can correspondingly replace different data acquisition boards aiming at different types of frequency converters and different types of motors, so that the fault detector can conduct data processing on equipment of different types. In addition, the portable fault detector of the embodiment of the application is internally provided with the data analysis board card, so that the data acquired by the data acquisition board card can be analyzed and processed in time without depending on a data analysis platform at the rear end; and because all the data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires and integrated, the current acquisition modules and the voltage acquisition modules of a plurality of channels can be integrated on one board card, so that the communication bandwidth of the data acquisition board card acquired by the frequency converter is greatly improved. In addition, because all data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires, unnecessary wiring is avoided, the wiring distance of a communication line is shortened, and the capacity of bearing high-speed signals of the data acquisition board card acquired by the frequency converter is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a portable fault detector according to an embodiment of the present application;

fig. 2 is an exemplary schematic diagram of a fault detection apparatus in the related art;

fig. 3 is an exemplary structural diagram of a fault detection device in the related art;

fig. 4 is an exemplary structural schematic diagram of a data acquisition board card in a fault detector according to an embodiment of the present application;

fig. 5 is an exemplary structural schematic diagram of a data acquisition board card for acquiring a frequency converter in a portable fault detector according to an embodiment of the present application;

fig. 6 is an exemplary structural schematic diagram of a data acquisition board card for acquiring a motor in a portable fault detector according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an exemplary structure of another portable fault detector provided in an embodiment of the present application;

FIG. 8 is a schematic diagram illustrating an exemplary structure of a CAN signal detection board card in a portable fault detector according to an embodiment of the application;

fig. 9 is an exemplary structural diagram of each board card in the fault detection apparatus in the related art;

fig. 10 is a schematic diagram of an exemplary structure of a board card in a portable fault detector according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

As shown in fig. 1, in an embodiment of the present application, the portable fault detector includes a data acquisition board, a data analysis board, and a display screen;

the data acquisition board is a data acquisition board acquired by a frequency converter or a data acquisition board acquired by a motor, and the data acquisition board acquired by the frequency converter and the data acquisition board acquired by the motor can be switched in a pluggable manner; the data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires and integrated;

the input end of the data acquisition board card is connected with the frequency converter or the motor, the output end of the data acquisition board card is connected with the input end of the data analysis board card, and the output end of the data analysis board card is connected with the input end of the display screen.

The portable fault detector in the embodiment of the application mainly comprises three parts:

a first part: the data acquisition board card is used for carrying out data acquisition on the frequency converter or the motor, can adopt a universal standard interface to adapt to the frequency converters or the motors with various brands and models, carries out data storage and data processing on detected data, and sends the data after the data processing to the data analysis board card. The data acquisition board card acquired by the frequency converter and the data acquisition board card acquired by the motor can be switched in a pluggable manner. In practical application, the portable fault detector generally comprises a plurality of data acquisition boards, the plurality of data acquisition boards cannot be used for acquiring data of the frequency converter and also are used for acquiring data of the motor, that is, the plurality of data acquisition boards are used for acquiring data of the frequency converter or are used for acquiring data of the motor, and therefore the portable fault detector can work normally.

A second part: the data analysis board card is used for analyzing and processing the received data, and the data output by the data acquisition board card can be the data of the frequency converter or the data of the motor according to different areas of a communication protocol. In the process of analyzing and processing the received data, the corresponding frequency converter or motor can be subjected to fault judgment by combining with technologies such as artificial intelligence, big data and the like, so that the trend of the working state of the frequency converter or motor is analyzed, the analysis result is sent to a display screen, and meanwhile, the analysis result can be stored in a high-capacity hard disk.

Third section: and the display screen is used for displaying the analysis result. Here, the display screen may be a touch display screen, and related personnel may operate based on the touch display screen, so that the touch display screen may display and convert data according to the operation of the user.

Therefore, the portable fault detector provided by the embodiment of the application can correspondingly replace different data acquisition boards aiming at frequency converters of different types and motors of different types, so that the fault detector can perform data processing on equipment of different types. Further, if the industrial equipment fails, related staff can trace back historical working state data of the corresponding equipment through the touch function of the display screen, so that the type of the failure can be quickly determined and the failure position can be positioned; if the industrial equipment does not have faults and works normally, the data analysis board can analyze the trend of the working state of the corresponding equipment, so that the fault early warning function is realized, related personnel can maintain the corresponding equipment in a production gap conveniently instead of reprocessing the corresponding equipment when the corresponding equipment really has faults, and the purpose of reducing production loss caused by abnormal stagnation of a production line is achieved.

The following describes major improvements of the embodiments of the present application with respect to the related art:

specifically, referring to fig. 2, fig. 2 shows an exemplary schematic diagram of a fault detection device in the related art, where a detection object of the fault detection device is a frequency converter, a data acquisition board installed on the fault detection device cannot process locally acquired data by itself, and needs to rely on a data analysis platform at a back end, and an integrated machine (or a server) in fig. 2 is a hardware carrier installed with the data analysis platform for analyzing and processing data of the frequency converter, and because the product includes the fault detection device at a front end and the data analysis device at a back end, the two devices are independent, so that a use place of the product is limited, flexible and portable requirements cannot be met, and maintenance cost caused by the two devices is high.

The portable fault detector in the embodiment of the application is internally provided with the data analysis board, and the data analysis board realizes the relevant functions of the data analysis platform, so that the data acquired by the data acquisition board can be analyzed and processed in time without depending on the data analysis platform at the rear end, and therefore, the portable fault detector is an integrated instrument, the use field is not required to be considered, the flexible and portable requirements are met, and the corresponding maintenance cost is lower.

Specifically, referring to fig. 3, fig. 3 is a schematic structural diagram of an exemplary fault detection device in the related art, where the product includes a data acquisition board, a current detection board, and a voltage detection board, where the data acquisition board in this example is a data acquisition board for acquiring a frequency converter; here, the data acquisition board card, the current detection board card and the voltage detection board card are respectively boards which are different and independent, the data acquisition board card is used for summarizing data acquired by each current detection board card and each voltage detection board card, the data acquisition board card, the current detection board card and the voltage detection board card are connected through external wires, and when the number of channels for data acquisition is more and/or the detection frequency is higher, the phenomenon of data packet loss often occurs.

In the portable fault detector of the embodiment of the application, as shown in fig. 4, the data acquisition board card integrated design that gathers the converter can be realized, wherein the current acquisition module and the voltage acquisition module are connected through wires, so that the current acquisition module, the voltage acquisition module and the data acquisition transmission board with a plurality of channels are integrated on one board card, that is, the original data acquisition board card, the current detection board card and the voltage detection board card are combined and integrated on one board card, and the one board card is the data acquisition board card that gathers the converter in the embodiment of the application, so that the communication bandwidth of the data acquisition board card that gathers the converter is greatly improved. In addition, because all data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires, impedance matching design can be carried out, unnecessary wiring is avoided, the wiring distance of a communication line is shortened, and the capacity of bearing high-speed signals of the data acquisition board card acquired by the frequency converter is further improved.

It should be noted that, in the embodiment of the present application, only the data acquisition board card acquired by the frequency converter may be designed integrally, because in the related art, there is a technical problem of communication bandwidth for the data acquisition board card acquired by the frequency converter, and the data needs to be preprocessed and improved; the technical problem of the communication bandwidth does not exist in the data acquisition board for the motor acquisition, so that the data acquisition board does not need to be improved.

In summary, it is difficult to find that, the portable fault detector provided by the embodiment of the application can correspondingly replace different data acquisition boards aiming at different types of frequency converters and different types of motors, so that the fault detector can perform data processing on equipment of different types. In addition, as the portable fault detector of the embodiment of the application is internally provided with the data analysis board, the data acquired by the data acquisition board can be analyzed and processed in time without depending on a data analysis platform at the rear end; and because all the data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires and integrated, the current acquisition modules and the voltage acquisition modules of a plurality of channels can be integrated on one board card, so that the communication bandwidth of the data acquisition board card acquired by the frequency converter is greatly improved. In addition, because all data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires, unnecessary wiring is avoided, the wiring distance of a communication line is shortened, and the capacity of bearing high-speed signals of the data acquisition board card acquired by the frequency converter is further improved.

In some embodiments of the present application, the data acquisition board card acquired by the frequency converter includes a voltage detection module and a current detection module; the voltage detection module is externally connected with a voltage division module, and the output end of the voltage division module is connected with the input end of the voltage detection module; the current detection module is externally connected with a Hall sensing device, and the output end of the Hall sensing device is connected with the input end of the current detection module.

In some embodiments of the present application, the data acquisition board for acquiring the frequency converter includes an adder, a linear optocoupler, an a/D conversion module and a microprocessor module; the output end of the voltage division module is connected with the input end of the linear optocoupler, and the output end of the linear optocoupler is connected with the input end of the A/D conversion module; the output end of the Hall sensing device is connected with the input end of the adder, and the output end of the adder is connected with the input end of the A/D conversion module; the output end of the A/D conversion module is connected with the input end of the micro-processing module, and the output end of the micro-processing module is connected with the input end of the data analysis board card.

For convenience, the following description will be given for the two embodiments, as shown in fig. 5:

specifically, the voltage dividing module and the hall sensing device which are externally connected can be devices installed on the frequency converter. In the embodiment of the application, the voltage data of the frequency converter is collected through the external voltage division module, the linear optocoupler arranged on the data collection board card collected by the frequency converter and the A/D conversion module; the three-phase current is linearly reduced through the external Hall sensor, and the three-phase current is detected through an adder operational amplifier circuit and an A/D conversion module which are arranged on a data acquisition board card for acquiring the frequency converter, so as to preset a detection period. The data of the current detection module and the voltage detection module are uploaded to the data analysis board card through the micro-processing module, wherein the data acquisition and transmission circuit shown in fig. 5 is the micro-processing module.

In some examples, the preset detection period may be 2ms.

In some examples, the microprocessor module may be a microcontroller.

Further, since the working voltage of the frequency converter is a direct-current high voltage (0-600 VDC in normal operation, and about 1000VDC at maximum), in some examples, the voltage data of the frequency converter can be collected through the voltage dividing module and the a/D conversion module, and a high-precision linear optocoupler circuit is added between the voltage dividing module and the a/D conversion module for isolation. The voltage division part can be flexibly arranged on the frequency converter as a small-sized card, and the high-voltage linear voltage division is introduced into the portable fault detector provided by the embodiment of the application after reaching the safety range below 36V for further data acquisition and detection, so that the safety of related staff is ensured. Because the three-phase output current of the frequency converter is alternating current heavy current, the range of the output current can reach 0-2000AAC. Because of the excessive value, the common sampling resistor or metering chip mode is difficult to meet the requirement. Therefore, in some examples, the open-type linear hall sensor may be used in combination with the adder circuit to convert the three-phase output current into a voltage range that can be processed by the a/D conversion module and then detect the three-phase output current. Meanwhile, the detection speed can be improved, the sampling frequency reaches 2ms, the related requirements of the Nyquist sampling law are met, all frequency domain information of the frequency converter in the working state can be detected as much as possible, the data analysis board card can recover the frequency spectrum state of the three-phase output current through Fourier transformation, and the working state of the frequency converter is judged better.

In some embodiments of the present application, the data acquisition boards collected by the frequency converters further include an address module, each of the data acquisition boards collected by the frequency converters corresponds to a different address, and an output end of the address module is connected with an input end of the micro-processing module, as shown in fig. 5.

Specifically, the data acquisition board card for acquiring the frequency converter can also comprise an address module, so that the purpose of detecting the voltage and the current of the single frequency converter can be achieved. In practical application, the data of a plurality of frequency converters can be detected by adding the same type of board card according to practical requirements and because the addresses of the data acquisition board cards acquired by the frequency converters are different.

It is worth mentioning that the data transmitted by different data acquisition boards can be distinguished by the data analysis boards. In particular to a portable fault detector, the data acquisition board for acquiring the frequency converters is clamped on which frequency converters depends on the actual selection of operators.

Therefore, in the embodiment of the application, the data of a plurality of frequency converters are conveniently detected by arranging the address module in the data acquisition board card for acquiring the frequency converters.

In some embodiments of the present application, the data acquisition board for acquiring the motor includes an electric energy metering module and a multiplexing chip, as shown in fig. 6;

the input end of the electric energy metering module is connected with the output end of the data acquisition board card; the output end of the electric energy metering module is connected with the input end of the multiplexing chip, the output end of the multiplexing chip is connected with the input end of the micro-processing module, and the output end of the micro-processing module is connected with the input end of the data analysis board card.

In some embodiments of the present application, the data acquisition board for acquiring the motor includes a current transformer module and an ac voltage detection module; the output end of the current transformer module and the output end of the alternating voltage detection module are respectively connected with the input end of the electric energy metering module.

For convenience, the following description will be given for the two embodiments:

specifically, the number of the electric energy metering modules is multiple, each electric energy metering module respectively collects alternating current and alternating voltage of the motor through the current transformer module and the alternating voltage detection module, and the collected data are sent to the micro-processing module through the multiplexing chip, wherein the current transformer module can be a current transformer, and the multiplexing chip can be in time-sharing communication with a serial port of the micro-processing module, so that occupation of the serial port can be reduced. And then, the micro-processing module can collect the data such as effective alternating current, alternating voltage and the like in the acquired data and send the collected data to the data analysis board card.

Further, for single-phase ac circuits such as motors, the working voltage is generally about 380VAC, the current is below 16A, and an excessive active power in the circuit tends to indicate that the voltage or the current is abnormal, and meanwhile, the circuit and the equipment are also easy to burn out due to the temperature rise, so that the electric power is an important fault detection index. The portable fault detector provided by the embodiment of the application can detect the target circuit and equipment through the electric energy metering module. In some examples, the data acquisition board card for the motor acquisition can be installed into at most 12 electric energy metering modules according to requirements, each module can acquire a plurality of electric parameters such as voltage, current, active power, power factor, frequency, electric energy, temperature and the like of one path of alternating current circuit, acquired data are independently sent to the micro-processing module through the TTL level serial port, and then the acquired data are assembled by the micro-processing module and then are uniformly uploaded to the data analysis board card. Here, for portable consideration, the current collection mode of the electric energy metering module can adopt an AC mutual inductance type, and an external current transformer is used for replacing a manganese copper resistor, so that the original circuit cannot be invaded, the current measurement range can be expanded, and the electric energy metering module is applicable to wider application scenes.

In practical application, the data acquisition board card for motor acquisition can also comprise an address module, and each data acquisition board card for motor acquisition corresponds to different addresses respectively, so that the purpose of detecting voltage and current of a single motor can be achieved. In practical application, the data of a plurality of motors can be detected by adding the same type of board cards according to practical requirements and because the addresses of the data acquisition board cards acquired by the motors are different.

It is worth mentioning that the data transmitted by different data acquisition boards can be distinguished by the data analysis boards. In particular to a portable fault detector, the data acquisition board for motor acquisition is clamped on which frequency converters depends on the actual choice of operators.

In some embodiments of the present application, the data analysis board may include an edge computing module and a GPU acceleration module, where the edge computing module and the GPU acceleration module are connected.

The edge calculation module may use a fault judgment algorithm, a self-learning algorithm, and the like.

Further, the following detection may be performed by a fault judgment algorithm: 1. detecting whether the current data are balanced or not; 2. detecting whether abrupt changes exist in the voltage data/current data; 3. starting detection of gradually rising voltage data from no current data to no current data; 4. shutdown detection in which the current data gradually decreases from the presence to the absence of the voltage data, and the like; in addition, the position of the fault can be roughly judged through the relation between the voltage data and the current data, and a maintenance reference is provided for related personnel.

It should be noted that, in the related art, the voltage and the current of the industrial equipment are detected, and in this case, the voltage and the current of the frequency converter are detected, so that the operation state of the frequency converter is adjusted and compensated according to the voltage and the current of the frequency converter. For example, the voltage of the inverter is detected to match the frequency change, so that the magnetic flux of the motor is kept uniform. This is due to the torque of the three-phase asynchronous motor being generated by the interaction between the magnetic flux of the motor and the current flowing in the rotor. At rated frequencies, if the voltage is constant and only decreases in frequency, the magnetic flux is too great, the magnetic circuit is saturated, and the motor is burnt out seriously. It must be ensured by voltage detection that the frequency converter output frequency changes in proportion to the voltage. For another example, if the command frequency of the motor is lowered too quickly during operation, the electromotive state is changed to the power generation state, and the regenerated energy is stored in the dc capacitor of the inverter. Due to the relation of the capacity and the withstand voltage of the capacitor, the voltage needs to be timely and accurately detected, and accurate and reliable information is provided for the frequency converter, so that the transformer is timely and effectively protected when in overvoltage. Thus, the voltage and current are also detected, but the roles in the embodiments of the present application and the roles played in the related art are not the same.

Further, current data and voltage data of a frequency converter or a motor of a specific brand in specific operation can be repeatedly learned through a self-learning algorithm, and standardized data are formed and stored in a database according to the current data and the voltage data. And then, the current data and the voltage data corresponding to the frequency converter or the motor which are actually acquired can be matched with standardized data stored in a database, and the artificial intelligence technology is utilized for fitting judgment, so that early warning can be carried out if the data are inconsistent continuously, and the related personnel can check and maintain in time.

In some other examples, for fault detection for the motor, the data analysis board may also implement a fourier transform function through an edge calculation module, such as extracting frequency domain information of three-phase current data, to determine whether the frequency domain change is smooth, whether there is a sudden change, and so on.

The GPU acceleration module is used for carrying out hardware acceleration on data processing, so that collected data can be rapidly and immediately processed to obtain analysis results and sent to the display screen.

In some other examples, the portable fault detector can encrypt local data through the data analysis board card and share the encrypted local data to a third party platform through a 5G network, so as to obtain cloud computing support or realize data sharing of a plurality of fault detectors.

In some embodiments of the present application, the portable fault detector may further include a CAN signal detection board card, as shown in fig. 7; the input end of the CAN signal detection board card is connected with the CAN bus, and the output end of the CAN signal detection board card is connected with the display screen.

Specifically, the portable fault detector may also integrate the detection function of the CAN signal, in combination with a specific application scenario. Here, the data acquisition board card CAN be used together with the CAN signal detection board card, and the CAN signal detection board card is connected with a CAN bus to realize detection of CAN signals.

It should be noted that, the data analyzed by the CAN signal detection board card CAN directly display the detection result on the display screen without passing through the data analysis board card, because in actual work, related personnel often only need to acquire the data of the CAN signal to determine, therefore, the data analysis is not required to be performed through the data analysis board card.

Further, as shown in fig. 8, a schematic diagram of structural connection of each module in the CAN signal detection board card is provided. The signals of each path of CAN bus CAN be subjected to denoising and resistance matching through a signal filter circuit respectively, then CANH and CANL are converted into CAN signals which CAN be processed by a micro-processing module through a CAN transceiver chip, and the signal data are sent to the micro-processing module for processing through a digital isolation circuit. Here, the CAN signal detection board card may further include an address module, so that CAN detect CAN signals of multiple paths of circuit data.

Because the CAN bus has the characteristics of strong anti-interference capability, multiple bearable nodes and long transmission distance, the instruction transmission and the data interaction between industrial equipment running on the production line are often completed through the CAN bus. When the equipment of a certain node on the bus fails, the related CAN data of the equipment is abnormal, and at the moment, the CAN signals on the bus are required to be collected, so that related staff CAN analyze the collected CAN signals or debug the CAN bus to find out a problematic CAN message frame, and the problematic node equipment is rapidly located. The portable fault detector provided by the embodiment of the application can meet the actual requirement.

In some embodiments of the present application, the portable fault detector may further include an upper computer; and the output end of the CAN signal detection board card is also connected with the upper computer.

In this way, related personnel CAN also directly acquire the data of the detected CAN signal through the upper computer.

In some embodiments of the present application, the data acquisition board, the data analysis board and the CAN signal detection board have the same size, and are disassembled or assembled by plugging the back board.

Specifically, as shown in fig. 9, which is an exemplary schematic diagram of connection of boards in similar products in the related art, it can be seen that the boards are connected by adopting a connector splicing and a flat cable splicing manner, and the plurality of data acquisition boards are stacked up and down by using copper columns. Therefore, when the board card needs to be replaced, the disassembly and the assembly are very inconvenient, and too many flat cables not only lead the inside of the fault detector to be disordered, but also can not ensure the connection firmness.

In this embodiment of the present application, as shown in fig. 10, the sizes of the data acquisition board card, the data analysis board card and the CAN signal detection board card are the same, and the structure of the plug-in box and the backboard is adopted, so that each board card is provided with a unified standard size and backboard interface, and is connected with a slot on the backboard, so that the connection is easy to plug and reliable.

In addition, still often can include the power supply board in this portable fault detector, the power supply board is the same with the size of other boards, and the power output of power supply board and inter-plate communication line all carry out the walking line through the backplate, have removed the winding displacement connection of disorder from, be convenient for unified management.

It is difficult to find that the embodiment of the application provides a connection mode of each board card in the portable fault detector, so that disordered flat cable connection is avoided, and unified management is facilitated.

In sum, the portable fault detector that this application embodiment provided can correspond to the converter of different models, the motor of different models and change different data acquisition integrated circuit boards to make the fault detector can carry out data processing to the equipment of different models, because still can carry out further analysis and demonstrate analysis result on the display screen to relevant data through the analysis function of data analysis integrated circuit board, therefore relevant staff can carry out dynamic monitoring to the industrial equipment on the different production lines through the data that the display screen demonstrates, has solved the comparatively single technical problem of the detection object of fault detection equipment among the correlation technique at least. In addition, as the portable fault detector of the embodiment of the application is internally provided with the data analysis board, the data acquired by the data acquisition board can be analyzed and processed in time without depending on a data analysis platform at the rear end; and because all the data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires and integrated, the current acquisition modules and the voltage acquisition modules of a plurality of channels can be integrated on one board card, so that the communication bandwidth of the data acquisition board card acquired by the frequency converter is greatly improved. In addition, because all data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires, unnecessary wiring is avoided, the wiring distance of a communication line is shortened, and the capacity of bearing high-speed signals of the data acquisition board card acquired by the frequency converter is further improved.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims (10)

1. The portable fault detector is characterized by comprising a data acquisition board card, a data analysis board card and a display screen;

the data acquisition board is a data acquisition board acquired by a frequency converter or a data acquisition board acquired by a motor, and the data acquisition board acquired by the frequency converter and the data acquisition board acquired by the motor can be switched in a pluggable manner; the data acquisition modules in the data acquisition board card acquired by the frequency converter are connected through wires and integrated;

the input end of the data acquisition board card is connected with the frequency converter or the motor, the output end of the data acquisition board card is connected with the input end of the data analysis board card, and the output end of the data analysis board card is connected with the input end of the display screen.

2. The portable fault detector of claim 1, wherein the data acquisition board for the frequency converter comprises a voltage detection module and a current detection module;

the voltage detection module is externally connected with a voltage division module, and the output end of the voltage division module is connected with the input end of the voltage detection module;

the current detection module is externally connected with a Hall sensing device, and the output end of the Hall sensing device is connected with the input end of the current detection module.

3. The portable fault detector of claim 2, wherein the data acquisition board for the frequency converter comprises an adder, a linear optocoupler, an a/D conversion module and a microprocessor module;

the output end of the voltage division module is connected with the input end of the linear optocoupler, and the output end of the linear optocoupler is connected with the input end of the A/D conversion module;

the output end of the Hall sensing device is connected with the input end of the adder, and the output end of the adder is connected with the input end of the A/D conversion module;

the output end of the A/D conversion module is connected with the input end of the micro-processing module, and the output end of the micro-processing module is connected with the input end of the data analysis board card.

4. The portable fault detector of claim 3, wherein the data acquisition boards acquired by the frequency converters further comprise address modules, each of the data acquisition boards acquired by the frequency converters corresponds to a different address, and an output end of each address module is connected with an input end of the microprocessor module.

5. The portable fault detector of claim 3 wherein the data acquisition board for motor acquisition comprises a plurality of power metering modules and a multiplexing chip;

the input end of the electric energy metering module is connected with the output end of the data acquisition board card; the output end of the electric energy metering module is connected with the input end of the multiplexing chip, the output end of the multiplexing chip is connected with the input end of the micro-processing module, and the output end of the micro-processing module is connected with the input end of the data analysis board card.

6. The portable fault detector of claim 5, wherein the data acquisition board for motor acquisition comprises a current transformer module and an ac voltage detection module; the output end of the current transformer module and the output end of the alternating voltage detection module are respectively connected with the input end of the electric energy metering module.

7. The portable fault detector of claim 1, wherein the data analysis board comprises an edge computation module and a GPU acceleration module, the edge computation module being coupled to the GPU acceleration module.

8. The portable fault detector of claim 1 further comprising a CAN signal detection board;

the input end of the CAN signal detection board card is connected with the CAN bus, and the output end of the CAN signal detection board card is connected with the display screen.

9. The portable fault detector of claim 8 further comprising an upper computer;

and the output end of the CAN signal detection board card is also connected with the upper computer.

10. The portable fault detector of claim 8 wherein the data acquisition board, the data analysis board and the CAN signal detection board are the same size and are disassembled or assembled by plugging in a back plate.

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