CN217358811U

CN217358811U - Intelligent gasket type sensor

Info

Publication number: CN217358811U
Application number: CN202121299526.6U
Authority: CN
Inventors: 张玉成
Original assignee: Hangzhou Leien Intelligent Manufacturing Co ltd
Current assignee: Hangzhou Leien Intelligent Manufacturing Co ltd
Priority date: 2020-12-01
Filing date: 2021-06-10
Publication date: 2022-09-02
Anticipated expiration: 2031-06-10

Abstract

The utility model belongs to the technical field of the fastener detects, a intelligence gasket type sensor is disclosed, wholly be ring annular structure, a serial communication port, including detection circuitry, signal processing circuit, controller, wireless communication module and power module, detection circuitry's output termination signal processing circuit's input, the controller is connected with signal processing circuit's output and wireless communication module respectively, and each circuit and module's power input end is connected respectively to power circuit's output. The utility model discloses an intelligence gasket-type sensor has realized wireless and intellectuality under the limited prerequisite of volume of keeping.

Description

Intelligent gasket type sensor

Technical Field

The utility model belongs to the technical field of the fastener detects, relate to sensor technology, especially, relate to a gasket type sensor.

Background

The bolt is an indispensable fastener in large-scale projects such as bridges, wind power generation, petrochemical industry and the like, and the pretightening force (fastening stress) of the bolt in the large-scale projects seriously affects the engineering safety. The on-line monitoring of the bolt fastening stress is the optimal choice for ensuring the safe and reliable bolt connection, and a set of bolt pretightening force monitoring system at least comprises two basic components of a detection device and a monitoring end. The detection device is used for obtaining bolt pretightening force data, and the monitoring end is used for monitoring and managing the bolt pretightening force data.

The signal transmission among all the components of the common bolt pretightening force monitoring system is realized through wired connection. The cables of the monitoring system cause great inconvenience to the site construction. Taking the large flange with 60 bolts shown in fig. 6 as an example, the cables of the gasket type sensors on the 60 bolts are reasonably arranged, and it is ensured that a tool does not touch any cable in the bolt operation process, which is a serious trouble for an operator. Moreover, for a large project involving thousands of bolts to be monitored, the wiring work of a single sensor constitutes a sub-project with a not small volume.

The chinese utility model patent application with publication number CN108566437A discloses a bolt-up safety remote monitoring network system, which connects the sensing layer sensor system as the detection device and the big data software system and the user terminal as the monitoring end through the network transmission service system, and the sensing layer sensor system as the detection device adopts the wireless communication mode to connect with the network layer gateway base station in the network transmission service system. The system well realizes the semi-wireless realization of the bolt pretightening force monitoring system. However, the sensing layer sensor system adopts the existing metal strain type, ceramic thick film type, sputtering film type or semiconductor type gasket type sensor (inner diameter D =16.4, outer diameter D =35, thickness H =7 mm), and the part except the gasket sensor is packaged in an IP67 waterproof box with reference dimension outline W L H = 60H 100X 30 mm. The existing gasket type sensor needs an external cable to realize external signal transmission. Also taking the flange shown in fig. 6 as an example, the monitoring system of the utility model application will form 60 square boxes with the size W x L H =60 x 100 x 30mm arranged around the flange. Not only the square box is fixed and has brought extra work for constructor, with 60 square boxes and with the sensing between the cable arrange rationally to ensure that in the bolt operation process, any square box and any cable are not touched to the instrument, be a serious puzzlement especially to the operation workman.

Therefore, a gasket type sensor for detecting the pretightening force of the bolt in large engineering is wireless, and is a practical requirement in production practice. The existing gasket sensor outputs voltage signals outwards, and the voltage signals need to be converted into digital signals to be sent outwards in a wireless mode. A gasket type sensor without an external wire needs to be designed, a processing circuit of a voltage signal and a wireless module need to be integrated into the gasket sensor, the signal processing circuit and the wireless module need a power supply, however, the size of the gasket sensor is limited by the function of a gasket, and a battery with enough capacity is not arranged in a narrow space inside the gasket sensor. If the sensor is provided with an external power supply, the sensor becomes wired again.

Disclosure of Invention

The utility model aims at solving the above-mentioned technical problem, provide a gasket type sensor that need not external connection that can realize the wireless control of bolt pretightning force.

The technical scheme of the utility model is that: the utility model provides an intelligent gasket type sensor, wholly be the ring structure, its characterized in that, including detection circuitry, signal processing circuit (signal amplification and analog-to-digital conversion circuit), controller (MCU), wireless communication module, and power module, detection circuitry's output termination signal processing circuit's input, the controller is connected with signal processing circuit's output and wireless communication module respectively, detection circuitry, signal processing circuit, controller, wireless communication module's power input end is connected respectively to power circuit's output.

Furthermore, the wireless communication module is a low-power-consumption Bluetooth module, and the power supply module comprises a power supply circuit and a solar film which is attached to the outer circumferential surface of the annular structure and supplies power to the internal power supply circuit. The power circuit includes a storage module for buffering power.

Further, the intelligent gasket sensor is configured with an independent ID and stored in the MCU. This allows the smart shim sensor to be uniquely identified by the terminal device.

When the intelligent gasket sensor works, the controller controls the power supply circuit to electrify the detection circuit, under the condition that the sensor is pressed, the detection circuit outputs a voltage signal, the voltage signal is processed into a digital voltage signal by the signal processing circuit and then input to the MCU, then the controller calculates and obtains a corresponding pressure value (bolt pre-tightening force value) according to the digital voltage signal, and then the calculated pressure information and ID information are packaged into a data packet and output to the low-power-consumption Bluetooth module for external wireless transmission.

The utility model discloses a gasket type sensor that does not need external connection is designed. Because the existing gasket sensor outputs voltage signals externally, the voltage signals need to be converted into digital signals to be wirelessly transmitted externally. The utility model provides a gasket type sensor that does not need the external connection, need be integrated to the gasket sensor together with voltage signal's processing circuit and wireless module, and signal processing circuit and wireless module need the power, however, the size of gasket sensor is subject to the gasket function (thickness will be thin, the fastening performance of influence bolt has been thick, the external diameter also can not be too big, the external diameter is too big then lead to adjacent very advanced two then can't assemble intelligent gasket type sensor on the bolt, the battery of sufficient capacity is not enough set up in its inside narrow and small space. Therefore, to design a gasket type sensor without external connection wires, it is necessary to overcome: the built-in power supply has no space, and the external power supply becomes a wired contradiction.

The utility model discloses an it establishes the solar energy film and disposes the electric storage module that is used for the buffer memory electric energy simultaneously to paste on the outside periphery of ring shape gasket formula sensor, and the technological means of reunion low-power consumption bluetooth module has successfully solved built-in power supply and has not the space, and external power supply becomes wired contradiction again.

The intelligent gasket type sensor is sleeved on the bolt and is positioned between the nut or the nut and the fastened piece. The intelligent gasket type sensor is limited by the function of the intelligent gasket type sensor as a bolt gasket, the thickness of the intelligent gasket type sensor needs to be thin, and the outer diameter of the intelligent gasket type sensor cannot be too large. How to integrate into detection circuitry, signal processing circuit, power supply circuit, controller (MCU), this kind of multicomponent part of bluetooth low energy module in limited size range, it is equally the utility model discloses a technical problem who solves. Therefore, the utility model provides a following scheme:

the supporting structure of the intelligent gasket type sensor consists of an elastic tube column body and a rubber ring, wherein a through hole matched with a bolt is formed in the middle of the elastic tube column body, and the rubber ring is sleeved on the elastic tube column body; the detection circuit comprises a measuring bridge consisting of a strain gauge and a standard resistor, wherein the strain gauge is attached to the outer side surface of the elastic tube cylinder along the axial direction, electronic elements of the detection circuit except the strain gauge, electronic elements forming a signal processing circuit, electronic elements forming a power circuit, a controller and a low-power-consumption Bluetooth module are arranged on a long-strip-shaped flexible circuit board at intervals in a grouping mode along the length direction, and the flexible circuit board is arranged between the elastic tube cylinder and the rubber ring around the elastic tube cylinder.

Optionally, the two ends of the elastic tube cylinder are provided with convex rings which expand radially outwards, the outer diameter of each convex ring is larger than the diameter of the corresponding nut circumcircle, and the rubber ring is integrally embedded between the two convex rings of the elastic tube cylinder.

Optionally, the upper end face and the lower end face of the intelligent gasket type sensor are composed of an inner ring face formed by the elastic tube cylinder and an outer ring face formed by the rubber ring end face, the inner ring face and the outer ring face are connected in a flush mode, and the outer diameter of the outer ring face is larger than the diameter of a corresponding nut circumcircle; the two ends of the elastic tube column body are provided with convex rings which slightly protrude outwards in the radial direction and are used for fixing the rubber rings.

No matter the sensor both ends face is the elasticity tube cylinder terminal surface alone or constitutes jointly by elasticity tube cylinder and rubber ring terminal surface, this intelligence gasket formula sensor's terminal surface all keeps leveling to guarantee enough big with the bearing surface of nut/nut contact, the spanner sleeve lower extreme when extra convex part is convenient for support the installation simultaneously, be convenient for keep sleeve axial and bolt coaxial in order to guarantee the installation accuracy.

Preferably, the controller is a micro-singlechip pre-programmed, and can perform power consumption management and electrical parameter self-diagnosis of the whole sensor.

Further, the intelligent gasket type sensor can receive an external command and switch three working modes: (a) full performance mode, continuously measuring and transmitting results at high frequency; (b) a low power consumption mode, which actively measures once at intervals and transmits the result; (c) in the standby response mode, the Bluetooth connection is only kept at ordinary times, and the result is measured and returned after an external instruction is received.

Preferably, the strain gauge is attached to the periphery of the cylinder of the elastic tube of the sensor by 4 sheets at intervals of 90 degrees or 8 sheets at intervals of 45 degrees. The strain gauges are divided into two groups which are respectively connected in series and then connected into two bridge arms of the measuring bridge, and the other two bridge arms are provided with equivalent standard resistors to form a measuring half bridge so as to acquire axial strain signals of the gasket.

Optionally, a USB interface connected to the flexible circuit board is disposed outside the rubber ring. Through the interface, the sensor can be used externally or diagnosed and configured in a wired mode when needed.

Furthermore, the intelligent gasket type sensor also comprises a Bluetooth repeater which is matched with the intelligent gasket type sensor for use, wherein the Bluetooth repeater comprises a Bluetooth module and a mobile network (GPRS/4G/5G) module, and can be connected with a plurality of intelligent gasket type sensors simultaneously and transmit data through a network.

The utility model discloses intelligent gasket type sensor's beneficial effect includes:

1. the intelligent gasket type sensor uses the rubber ring as a side shell, the internal space has excellent plasticity, the matching design can be made according to the layout and the shape of parts, and the processing is convenient; the problem of shielding wireless transmission signals cannot occur by using the rubber ring;

2. the utility model discloses a combination through low-power consumption bluetooth module and solar energy film to through the controller initiative to detection circuitry, signal amplification and AD converting circuit and power supply circuit carry out the break-make electricity control, adjust bluetooth module transmitting power that consumes lowly, realized the switching of several kinds of working modes, the idle time consumption of sensor is very low; the solar thin film with weak power generation capacity can be used as a power supply source to support the long-term operation of the gasket type sensor;

3. the utility model discloses an intelligence gasket type sensor has realized wireless and intellectuality under the limited prerequisite of keeping the volume. Compare in gasket formula pressure sensor that traditional wired connection used, the utility model discloses avoid having avoided wired puzzlement, need not external intermediate signal processing equipment, can direct output bolt fastening power signal to terminal equipment, use the scene and become extensively greatly.

Drawings

Fig. 1 is based on the utility model discloses one set of bolt pretightning force monitoring system's that intelligent gasket sensor founds principle schematic diagram.

Fig. 2 is a three-dimensional structure diagram of the intelligent gasket sensor of the present invention.

FIG. 3 is a schematic top view of the internal components of the intelligent shim sensor.

Fig. 4 is an expanded plan view of the flexible circuit board.

Fig. 5 is a schematic diagram of the internal circuit elements of the intelligent shim sensor.

Fig. 6 is a schematic view of a multi-bolt flange apparatus.

Fig. 7 is a structural comparison of an intelligent shim sensor with a conventional shim sensor.

Fig. 8 is a schematic structural diagram of a tubular gasket sensor which is susceptible to influence on the stability and reliability of bolt connection.

Fig. 9 is a schematic diagram of the positional relationship between the intelligent gasket type sensor and the nut when the intelligent gasket type sensor is installed.

FIG. 10 is a cross-sectional view of the wrench socket and nut in combination with a conventional shim sensor.

Fig. 11 is a schematic cross-sectional view of the wrench socket and nut in combination with the smart shim sensor.

Fig. 12 is a schematic diagram of a smart gasket sensor of configuration one.

FIG. 13 is a cross-sectional schematic view of the tube cylinder and rubber ring relationship of the smart gasket sensor of FIG. 12.

Fig. 14 is a schematic diagram of an intelligent gasket sensor of structure two.

FIG. 15 is a cross-sectional schematic view of the tube cylinder and rubber ring relationship of the intelligent gasket sensor of FIG. 14.

Fig. 16 is a schematic cross-sectional view of the relationship between the tube cylinder and the rubber ring of the intelligent gasket sensor of structure three.

Detailed Description

For a better understanding of the present invention, the following detailed description is provided in conjunction with the accompanying drawings.

Referring to fig. 1, this example shows that the utility model discloses an application scenario example of intelligent gasket sensor, intelligent gasket sensor constitutes a set of bolt pretightning force monitoring system promptly, and the system includes intelligent gasket formula sensor 1, bluetooth repeater 3, remote server 4 and mobile terminal 5.

Referring to fig. 2 and 3, the intelligent shim sensor 1 of the present invention includes an elastic tube cylinder 11, a rubber ring 12, a strain gauge, a flexible circuit board 13, an electricity storage module 14, and a solar thin film 122. The middle of the elastic tube column body 11 is a through hole matched with the bolt, and the rubber ring 12 is sleeved on the elastic tube column body 11. The strain gauge is attached to the outer side surface of the elastic tube column along the axial direction, and forms a measuring bridge circuit together with the standard resistor on the flexible circuit board 13. The flexible circuit board 13 is provided with a power circuit 131, a signal amplifying and AD converting circuit 132, a single chip microcomputer 133 and a low power consumption bluetooth module 134. The flexible circuit board 13 is fitted around the inside of the rubber ring 12. The solar energy film 122 is attached to the outer circumferential surface of the rubber ring 12, and the electricity storage module 14 is arranged inside the rubber ring. The outer side of the rubber ring 12 is provided with a USB interface 121 connected with the flexible circuit board 13.

The flexible circuit board 13 is made of a flexible substrate. Referring to fig. 3 and 4, the electronic components constituting the power circuit 131 and the signal amplification and AD conversion circuit 132 are grouped and arranged on the long flexible circuit board, and the electronic components of each group of the power circuit 131 and the signal amplification and AD conversion circuit 132, the single chip 133, and the bluetooth low energy module 134 are arranged at intervals along the length direction of the flexible circuit board. The space is only provided with a conducting wire and no electronic element, so that the bending is facilitated.

The internal circuit structure of the intelligent shim sensor 1 is shown in fig. 5. Four strain gauges are attached to the periphery of the elastic tube column body of the sensor at intervals of 90 degrees and are divided into two groups in equal, the total resistance values are respectively marked as R1 and R3 after the strain gauges are connected in series, two opposite bridge arms of the measuring bridge circuit are connected, and the other two bridge arms are provided with equivalent standard resistors R2 and R4 to form a measuring half-bridge circuit so as to acquire axial strain signals of the elastic tube column body 11. The signal of the measuring bridge circuit enters an amplifying and converting circuit 132 for analog-to-digital conversion, and is converted into a digital signal which enters a single chip microcomputer 133. The single chip microcomputer 133 selects a micro size, can calculate a bolt pretightening force value, and controls each electronic component to perform power consumption management and electrical parameter self-diagnosis of the whole intelligent gasket type sensor. The bluetooth low energy module 134 is controlled by the single chip, and can be connected with an external device (bluetooth repeater 3 or mobile terminal 5) by bluetooth for communicating, receiving and sending data and instructions.

The intelligent gasket type sensor 1 can receive an external instruction and switch three working modes: (a) full performance mode, continuously measuring and transmitting results at high frequency; (b) a low power consumption mode, which actively measures once at intervals and transmits the result; (c) in the standby response mode, only the Bluetooth connection is kept at ordinary times, and the result is measured and returned after an external instruction is received.

Each intelligent gasket sensor 1 has an independent ID number, and the remote server 4 can identify the ID number of the intelligent gasket sensor, bind the ID number with corresponding item information and location information (GIS), and manage received data in a unified and ordered manner.

The Bluetooth repeater 3 comprises a Bluetooth module and a mobile network (GPRS/4G/5G) module, and can be connected with a plurality of intelligent gasket type sensors at the same time and transmit data to the remote server 4.

The remote server 4 is a computer assigned with a public network IP, is provided with corresponding application software, and can analyze, process and subsequently apply the data received from the Bluetooth repeater 3.

The mobile terminal 5 is a smart phone, a tablet computer or a notebook computer, is provided with corresponding application software, and can be connected with a plurality of intelligent gasket type sensors through Bluetooth to read data. Meanwhile, the mobile terminal 5 can access the remote server 4 through the network to perform remote interaction. Under remote interaction, the remote server 4 is used as a service host, the mobile terminal 5 logs in the remote server at any time and any place through a network, the mobile terminal 5 provides a display interface, and processing and calculation are completed in the remote server 4.

The application software of the mobile terminal 5 or the remote server 4 is internally provided with a standard construction specification requirement database, the safety operation sequence of multi-bolt fastening can be guided through automatic comparison and analysis of data, meanwhile, the correctness of the operation sequence can be verified, and a safety warning can be sent out when necessary.

This function is very practical. For example, the 48-bolt large flange plate in the petrochemical industry shown in fig. 6 conforms to the "petrochemical process equipment inspection and maintenance technical specification" (CSEI/JX 0004-. The method puts forward definite requirements on the fastening force and the fastening sequence of the bolts, the bolts are numbered and divided into 12 groups, the fastening sequence of the 12 groups is 1-7-4-10-2-8-5-11-3-9-6-12, and four bolts in one group also have the requirement of fastening for multiple times in sequence. The technical specification is digitalized and then the application software of the remote server 4 or the mobile terminal 5 is recorded, in the installation process of the flange equipment, the system can prompt 12 groups of bolts and the fastening sequence of a single bolt in each group through a graphical interface, monitor the pretightening force of the bolts in real time, prompt the completion of fastening when the required pretightening force is reached, and prompt the number of the next bolt to be fastened; and if the sequence of fastening construction violates the specification requirement, a safety warning is given.

And a database is built in the remote server 4, various data such as each group of bolt fastening force, intelligent gasket type sensor battery information and circuit working condition information are collected and stored, and the data are comprehensively analyzed at regular time, so that long-term monitoring and related safety early warning of the bolt fastening force of a project are realized, and maintenance reminding of a monitoring system is realized.

The mechanical structure of the intelligent gasket sensor 1 of the present invention also has many advantages.

The existing gasket type sensor adopting an elastic tube cylinder as a pressure-bearing structure is generally designed into a structure that the upper end (pressure-bearing end) of a tube column freely moves relative to other parts and the lower end is fixedly connected with a shell (the shell has a supporting effect on the tube column) in order to avoid the influence of other parts (the shell, an internal structure and the like) of the sensor on the deformation of the elastic tube column. In addition, in order to avoid the influence of the nut pressing on the metal shell part on the measurement accuracy, the existing gasket type sensor is generally provided with a pipe column with the upper end protruding for a certain distance which is higher than the upper end surface of the shell, and the distance which is higher than the upper end surface of the shell cannot be used as the effective length for attaching the strain gauge.

Referring to fig. 7, the intelligent shim sensor 1 of the present invention is compared with an existing shim sensor 2. The tube column 21 and the shell 22 of the sensor 2 are processed separately, the components are arranged in the shell 22, and the upper end surface of the tube column 21 is provided with a section higher than the shell so as to avoid inaccurate measured value caused by the fact that a nut is pressed on the upper cover surface of the hard shell 22. The tubular column 21 is fixedly connected to the housing 22 only once at a. The shell 22 is a circular ring with a U-shaped cross section, which is complicated to process, and the two parts are separately processed and then connected to be assembled, which is complicated in process. The utility model discloses then only need the comparatively simple tube column body of processing structure and rubber circle, with the rubber snare again on the tube column body can, need not extra fixed means.

Casing 22 and tube cylinder 21 are no matter through welding or buckle assembly in A department, all need the mutual contact of certain length just can guarantee necessary firmness, then the tube cylinder of this segment length (distance D and casing lower extreme thickness sum) can not be used for measuring and paste the foil gage, and the district section D of capping on the protruding casing of same tube cylinder upper end also can not paste the foil gage, therefore the maximum length that current gasket formula sensor actually can be used for pasting the foil gage is H, compare in the utility model discloses, under the foil gage measurement district section length H that equals, the tube cylinder will be D + D's length more. Therefore the utility model provides an intelligence gasket type sensor's pipe cylinder 11 can accomplish to be shorter, has saved material cost, and the thickness that is littleer simultaneously also makes sensor stability better, and the application scene is wider.

Referring to fig. 8-11, the end face structure of the intelligent gasket sensor 1 of the bolt pretightening force monitoring system has at least the following two schemes.

The first scheme is as follows: the upper end surface area of the support nut circular pressing surface sensor is flat, and specifically, the parts of the upper surface and the lower surface of the sensor, which correspond to the nut circular pressing surfaces, are flat pressed surfaces which are vertical to the axis of the middle through hole of the gasket.

Referring to fig. 8 (top is a plan view, and bottom is a front sectional view), in the conventional gasket sensor adopting a tubular column structure, in order to avoid the influence of the shell 22 on the deformation of the elastic tubular column 21, the upper end of the tubular column 21 is not connected to the shell 22, the upper end of the tubular column protrudes out of the upper surface of the sensor, the circular pressing surface Y of the nut 6 is pressed against the upper end of the tubular column instead of a flat surface, and the bolt is easily inclined, as shown by a dotted line block X, so that the connection after the bolt is tightened is unreliable.

In order to overcome the above problems, as shown in fig. 9, the contact area between the upper surface of the intelligent gasket type sensor 1 and the corresponding nut circular pressing surface is made flat, the circular ring surface of the nut circular pressing surface contacting the upper end surface of the sensor may be completely an elastic tube cylinder 11, or an inner ring part tube cylinder 11 and an outer ring part rubber ring 12 are combined; but as long as the contact surface of the nut and the sensor is flat, the stable supporting force is provided for the nut in the early stage of the bolt fastening process, and the inclination of the bolt can be avoided. The contact surface of the nut is divided into the elastic pipe column body part and the rubber ring, because the elastic modulus of the pipe column body is far greater than that of rubber, the actual deformation is still very small after the fastening force of the nut is increased, the pressure of the nut is mainly born by the elastic pipe column body, and the measurement precision cannot be influenced. And prevent the bolt slope, can guarantee bolted connection's stability and reliability.

In the second scheme, the supporting surface corresponding to the sleeve is flush with the upper end of the elastic tube cylinder, specifically, the position of the upper surface of the sensor corresponding to the lower end of the wrench sleeve is a flat surface perpendicular to the axis of the middle through hole of the gasket, and the flat surface is flush with the corresponding side end surface of the elastic tube cylinder.

Referring to fig. 10, a pressure-bearing pipe column 21 of an inner ring of a conventional gasket type sensor protrudes from the upper end surface of a housing 22, when a wrench is used to fasten a nut 6, a sleeve 7 naturally leans against an outer ring of the upper end surface of the sensor, and because the outer ring has a height difference of H relative to the inner ring, the contact area between the sleeve 7 and the nut 6 is reduced, and the nut 6 has a thickness of H and is exposed and does not contact with the inner wall of the sleeve 7. This will result in the nut lower half being subjected to excessive torque, exceeding normal operating loads, causing the lands to wear, thereby rendering the entire nut unusable.

If the position of the wrench sleeve is manually lifted during installation, the wrench sleeve is aligned with the nut in the height direction, and then the wrench can shake easily and is difficult to keep horizontal because the lower end of the wrench cannot be supported by the aid of the upper end face of the gasket type sensor. When the spanner inclines, an inclination angle exists between the spanner sleeve and the axis of the nut, the inner wall of the sleeve is not tightly attached to the outer side surface of the nut any more, but the inner wall of the sleeve is in angular contact with the nut, the stress of a contact point is extremely large, the angle of the nut is extremely easy to polish, and the whole nut is damaged.

In order to overcome the above problems, as shown in fig. 11, the supporting surface of the upper end of the intelligent gasket type sensor 1 of the present invention corresponding to the lower end of the sleeve is made flush with the upper end of the elastic tube column 11, so that when the wrench is fastening the nut, the wrench sleeve 7 naturally leans against the upper end of the intelligent gasket type sensor 1, because the height of the leaning supporting surface is consistent with the height of the upper end surface of the elastic tube column 11 of the supporting nut 6, the sleeve 7 can naturally align with the nut 6 in the axial direction, the complete side surface of the nut is located in the sleeve, and the maximum contact area of the two is ensured.

The characteristics of the two schemes are independent of each other, but can also be satisfied at the same time.

Referring to fig. 12-16, the concrete setting mode of the elastic tube column body 11 and the rubber ring 12 of the intelligent gasket type sensor 1 in the bolt pretightening force monitoring system has three schemes:

referring to fig. 12 and 13, the upper and lower end faces of the elastic tube 11 are extended outward in the radial direction to form protruding rings, and the outer diameter of the rubber ring 12 is equal to the outer diameter of the protruding rings and is completely embedded between the upper and lower protruding rings.

In the second structure, referring to fig. 14 and 15, the upper and lower end faces of the elastic tube column 11 are provided with a small amount of radially outward expanded convex rings for positioning and fixing the rubber ring 12.

With reference to fig. 16, the lower end surface of the elastic tube column 11 is radially expanded outwards to form a larger convex ring, the outer diameter of the convex ring is equal to that of the rubber ring 12, and the upper end surface of the elastic tube column 11 is provided with a small amount of radially expanded convex rings; the lower end face of the lower convex ring is attached to the lower end face of the rubber ring 12, and the upper end small convex ring is used for matching and fixing the inner side of the upper end of the rubber ring 12 to prevent the rubber ring from sliding upwards.

The protection scope of the present invention is not limited to the above-mentioned embodiments, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention.

Claims

1. The utility model provides an intelligent gasket type sensor, wholly is the ring structure, its characterized in that, including detection circuitry, signal processing circuit, controller, wireless communication module and power module, detection circuitry's output termination signal processing circuit's input, the controller is connected with signal processing circuit's output and wireless communication module respectively, detection circuitry, signal processing circuit, controller, wireless communication module's power input end is connected respectively to power circuit's output.

2. An intelligent mat sensor according to claim 1, wherein the wireless communication module is a bluetooth low energy module, the power supply module comprises a power supply circuit and a solar membrane attached to the outer circumferential surface of the ring-shaped structure for supplying power to the internal power supply circuit, and the power supply circuit comprises a power storage module for caching electrical energy.

3. The intelligent shim sensor according to claim 2, wherein the intelligent shim sensor is configured with an independent ID, the controller controls the power supply circuit to energize the detection circuit, the detection circuit outputs a voltage signal to the signal processing circuit, the voltage signal is processed into a digital voltage signal by the signal processing circuit and then input to the controller, the controller calculates a corresponding pressure value according to the digital voltage signal, and packages the calculated pressure value information and ID information into a data packet and outputs the data packet to the bluetooth low energy module for external wireless transmission.

4. An intelligent shim sensor according to claim 2, wherein the support structure of the intelligent shim sensor is composed of an elastic tube cylinder and a rubber ring, a through hole matched with the bolt is formed in the middle of the elastic tube cylinder, and the rubber ring is sleeved on the elastic tube cylinder; the detection circuit comprises a measuring bridge consisting of a strain gauge and a standard resistor, wherein the strain gauge is attached to the outer side surface of the elastic tube cylinder along the axial direction, electronic elements of the detection circuit except the strain gauge, electronic elements forming a signal processing circuit, electronic elements forming a power circuit, a controller and a low-power-consumption Bluetooth module are arranged on a long-strip-shaped flexible circuit board at intervals in a grouping mode along the length direction, and the flexible circuit board is arranged between the elastic tube cylinder and the rubber ring around the elastic tube cylinder.

5. An intelligent gasket sensor according to claim 4, wherein the elastomeric cylinder has radially outwardly extending collars at opposite ends thereof, the outer diameter of each collar being greater than the corresponding diameter of the corresponding nut, the rubber ring being integrally embedded between the collars of the elastomeric cylinder.

6. The intelligent gasket type sensor according to claim 4, wherein the upper and lower end faces of the intelligent gasket type sensor are composed of two parts, namely an inner ring face formed by the elastic tube cylinder and an outer ring face formed by the rubber ring end face, the inner ring face and the outer ring face are connected in a flush manner, and the outer diameter of the outer ring face is larger than the diameter of a corresponding nut circumcircle; the two ends of the elastic tube column body are provided with convex rings which protrude outwards in the radial direction and are used for fixing the rubber rings.

7. An intelligent gasket-type sensor according to claim 4, wherein the strain gauges are attached to the periphery of the cylinder of the elastic tube of the sensor at 90 ° intervals or at 45 ° intervals, the strain gauges are divided into two groups, and the two groups of strain gauges are respectively connected in series and then connected to two bridge arms of the measuring bridge, and the other two bridge arms are provided with equivalent standard resistors to form a measuring half bridge.

8. An intelligent mat sensor according to claim 4, wherein a USB interface is provided on the outside of the rubber ring for connection to a flexible circuit board.

9. An intelligent shim sensor as claimed in claim 2, further comprising a bluetooth repeater for use in conjunction therewith, the bluetooth repeater comprising a bluetooth module for communicating with the bluetooth low energy module of the intelligent shim sensor and a mobile network module for transmitting data across a network.