Remote intelligent monitoring system for bolt fastening force

Abstract

The invention discloses a remote intelligent monitoring system for bolt fastening force. The fastening force sensor serves as a sensing unit and is used for obtaining the bolt fastening force; the fastening force calculation unit is in signal connection with the fastening force sensor, is used for processing a signal output by the fastening force sensor and is in signal connection with a rotary joint; the edge processing device is used for searching all the fastening force calculation units connected to the edge processing device according to the Modbus ID to obtain state data of all the fasteners; and the cloud server is used for receiving and storing the fastener working state data reported by the edge processing device. According to the invention, long-term real-time on-line monitoring of the state of the fastener on the rotary motion structure is realized, local rapid intelligent analysis is realized through the edge data processing device, and data reporting is carried out through the Ethernet, so that potential risks can be found more timely and effectively, and accidents caused by loosening of the fastener are avoided.

Description

Technical Field

[0001] The invention belongs to the field of fastener detection, and in particular relates to a fastener state remote intelligent monitoring system realized through Ethernet and a data bus. Background Art

[0002] Fasteners are very important in various industries and are an important tool for connecting multiple parts. During the use of fasteners, they may fail due to environmental influences, object vibrations and other factors. However, the working status of fasteners has long been impossible to observe. Usually, the abnormality can only be discovered when the structural parts are completely loosened or fall off, and the loss has already occurred.

[0003] At present, some smart bolts have appeared on the market. They use piezoelectric materials, fiber optic modules, etc. to detect the deformation of fasteners, so as to determine the working status of fasteners. However, the structure is complex and the bolt structure is modified, which affects the strength and service life of the fasteners. In addition, facing complex environments, especially fasteners in rotating motion scenarios like fans, it is impossible to achieve long-term in-situ online measurement and real-time warning. Summary of the invention

[0004] In order to realize remote monitoring of the working status of fasteners in complex environments, the present invention proposes a remote intelligent monitoring system for bolt tightening force. The tightening force status is obtained by adding a monitoring sensor between the bolt and the object, and the data is sent to the edge server through a rotary joint and an RS485 bus, and then forwarded to the cloud server and user display software through Ethernet, thereby realizing large-scale real-time status monitoring of the bolts.

[0005] The present invention comprises: a fastening force sensor, a fastening force calculation unit, a rotary joint, an edge processing device and a cloud server.

[0006] The tightening force sensor is used as a sensing unit to obtain the bolt tightening force; The tightening force calculation unit is connected to the tightening force sensor signal, used to process the signal output by the tightening force sensor, and is connected to the rotary joint signal; The edge processing device is used to perform a round-robin search on all fastening force calculation units connected to the device according to the ModbusID to obtain the status data of all fasteners; The cloud server is used to receive and store the fastener working status data reported by the edge processing device.

[0007] Beneficial effects of the present invention: The present invention realizes long-term real-time online monitoring of the fastener status on the rotating motion structure, and realizes local rapid intelligent analysis through the edge data processing device, and reports data through Ethernet, which can discover potential risks more timely and effectively and avoid accidents caused by loose fasteners. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the application. The examples and their descriptions are used to explain the present application and do not constitute improper limitations on the present application. Figure 1 This is a schematic diagram of the data flow architecture of the remote intelligent monitoring system for bolt tightening force according to an embodiment of the present application.

[0009] Figure 2 This is a schematic diagram of the installation structure of the sleeve-type tightening force sensor according to an embodiment of the present application.

[0010] Figure 3 This is a schematic diagram of the installation structure of the flat fastening force sensor according to an embodiment of the present application.

[0011] Figure 4 This is a schematic diagram of the appearance of a bolt tightening force calculation unit according to an embodiment of the present application.

[0012] Figure 5 This is a data processing flow chart of the bolt tightening force calculation unit in an embodiment of the present application.

[0013] Figure 6 This is a data processing flow chart of the edge processing device for bolt tightening force data according to an embodiment of the present application.

[0014] Figure 7 This is a data processing flow chart of the bolt tightening force data forwarding cloud server in the embodiment of the present application.

[0015] Figure 8 This is a data processing flow chart of the bolt tightening force data display center in an embodiment of the present application. DETAILED DESCRIPTION

[0016] For a better understanding of the present application, the following embodiments are further described in detail, but the content of the present application is not limited to the following embodiments.

[0017] like Figure 1 As shown, the remote intelligent monitoring system for bolt tightening force provided in the embodiment of the present application includes a tightening force sensor 2, a tightening force calculation unit 3, a rotary joint 4, an edge processing device 5, a cloud server 6, and a data display center 7, which realizes real-time monitoring and analysis of the working status of the fastener 1.

[0018] The tightening force sensor 2 and the fastener 1 are independent components. When in use, the tightening force sensor 2 is installed between the bolt 101, the washer 102, the object 103, and the nut 104 of the fastener.

[0019] In this embodiment, the tightening force sensor 2 has two implementation forms, namely a sleeve type and a flat type.

[0020] like Figure 2 As shown, in a preferred example, the tightening force sensor 2 is composed of a sensor base plate 2101, a sensor wiring interface 2102, a sensor cover plate 2103, and a strain gauge 2104. It is a sleeve-type tightening force sensor, the upper part of which is a bolt 101 of a fastener, and the lower part is a gasket 102 of the bolt 101 of the fastener. This type of tightening force sensor is used to detect compression deformation.

[0021] like Figure 3 As shown, in a preferred example, the tightening force sensor 2 is composed of a sensor base plate 2201, a sensor wiring interface 2202, a sensor cover plate 2203, and a strain gauge 2204. It is a flat tightening force sensor, the upper part of which is a bolt 101 of a fastener, and the lower part is a gasket 102 of the bolt 101 of the fastener. This type of tightening force sensor is used to detect bending and extension deformation.

[0022] like Figure 4 As shown, in a preferred example, the tightening force calculation unit 3 includes a sensor interface 3001, a dip switch 3002, which can be used to set the Modbus ID of the bolt tightening force calculation unit 3, an RS485 bus output interface 3003, an RS485 bus input interface 3004 for connecting to the next bolt tightening force calculation unit, and a power supply interface 3005.

[0023] like Figure 5 As shown, the tightening force calculation unit 3 provided based on the above example performs operations such as detection, amplification, sampling, filtering, encoding, and waiting for query on the tightening force sensor data. The detection adopts a half-bridge circuit, the signal amplification adopts a MOS tube operational amplifier, the sampling uses voltage sampling and is converted into a 12-bit digital quantity, the sampling signal encoding algorithm adopts run-length encoding, the cache register adopts a linked list data structure, and the waiting query adopts the RS485 Modbus RTU round-searching method. The tightening force calculation unit can also set the Modbus ID through the dial switch.

[0024] In this embodiment, for the fasteners on the device rotating around the axis, the rotary joint 4 contains the positive and negative electrodes of the power supply and the RS485 bus AB line, and the rotary joint can enable the device (such as the fan blade) to rotate.

[0025] like Figure 6 As shown, in a preferred example, the edge processing device 5 performs a round-robin operation on a batch of fastening force calculation units 3 to obtain the status data of the fastener 2, and groups these fastening force calculation units 3 according to correlation, and reduces the misjudgment of environmental disturbances by analyzing the difference in changes in the same group of data and the difference in different groups of data, thereby improving the credibility of the analysis results of the working status of the fastener 2.

[0026] Furthermore, the edge processing device 5 can also set the IP address of the cloud server, regularly send the tightening force sensor 2 data to the cloud server 6 through the UDP protocol, receive data processing parameters forwarded from the cloud server 6, and respond to the forwarded request data from the cloud server 6.

[0027] like Figure 7 As shown, in a preferred example, the cloud server 6 opens a UDP listening port, receives and stores the fastener working status data reported by the edge processing device 5, updates the IP address of the edge processing device 5 in real time, and receives and forwards requests and parameter modification instructions from the data display center 7 to the designated edge processing device 5.

[0028] like Figure 8 As shown, in a preferred example, the data display center obtains the historical data, real-time data, and alarm information of the fastener 1 from the cloud server 6, and displays and pops up alarms; and displays and pops up alarms, and sends query instructions and parameter modification instructions to the designated edge processing device 5 through the cloud server 6.

[0029] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A remote intelligent monitoring system for bolt tightening force, characterized in that: include: A tightening force sensor, a tightening force calculation unit, a rotary joint, an edge processing device and a cloud server, characterized in that: The tightening force sensor is used as a sensing unit to obtain the bolt tightening force; The tightening force calculation unit is connected to the tightening force sensor signal, used to process the signal output by the tightening force sensor, and is connected to the rotary joint signal; The edge processing device is used to perform a round-robin search on all fastening force calculation units connected to the device according to the Modbus ID to obtain status data of all fasteners; The cloud server is used to receive and store the fastener working status data reported by the edge processing device.

2. A bolt tightening force remote intelligent monitoring system according to claim 1, characterized in that: The tightening force sensor is divided into a sleeve type tightening force sensor and a flat type tightening force sensor; The sleeve-type tightening force sensor is used to detect compression deformation; the flat-type tightening force sensor is used to detect bending extension deformation.

3. The bolt tightening force remote intelligent monitoring system according to claim 1 is characterized in that: The fastening force calculation unit detects, amplifies, samples, filters, encodes, caches, and waits for query processing on the fastening force sensor data.

4. A bolt tightening force remote intelligent monitoring system according to claim 3, characterized in that: The detection is realized by a half-bridge circuit; The amplification is achieved by a MOS tube operational amplifier; The sampling uses voltage sampling and is converted into a 12-bit digital quantity; The coding adopts run-length coding; The cache is implemented by registers and adopts a linked list data structure; The waiting query adopts RS485 Modbus RTU round-trip method.

5. A bolt tightening force remote intelligent monitoring system according to claim 3 or 4, characterized in that: The tightening force calculation unit sets the Modbus ID through a dial switch.

6. The bolt tightening force remote intelligent monitoring system according to claim 1 is characterized in that: The rotary joint comprises positive and negative electrodes of a power supply and an RS485 bus.

7. The bolt tightening force remote intelligent monitoring system according to claim 1 is characterized in that: The edge processing device groups the fastening force calculation units connected to the RS485 bus according to their correlation, and the change trends of the data in the same group under the influence of the environment are similar; by analyzing the difference in changes in the data in the same group, the misjudgment of environmental disturbance is reduced, and the credibility of the fastener working status analysis results is improved.

8. A bolt tightening force remote intelligent monitoring system according to claim 1 or 7, characterized in that: The edge processing device can set the cloud server IP address, regularly send the tightening force sensor data to the cloud server through the UDP protocol, receive the data processing parameters forwarded from the cloud server, and respond to the request data forwarded from the cloud server.

9. The bolt tightening force remote intelligent monitoring system according to claim 1, characterized in that: The cloud server opens a UDP listening port, receives and stores fastener working status data reported by the edge processing device, updates the edge processing device IP address in real time, and receives and forwards data display center requests and parameter modification instructions to the designated edge processing device.

10. A bolt tightening force remote intelligent monitoring system according to claim 9, characterized in that: The data display center obtains fastener historical data, real-time data, and alarm information from the cloud server, displays them and sends pop-up window alarms, and sends query instructions and parameter modification instructions to the designated edge processing device through the cloud server.

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