阅读说明：本技术 智能螺栓系统以及轨道车辆制动系统的连接松紧检测方法 (Intelligent bolt system and connection tightness detection method of rail vehicle braking system ) 是由 沈旭 张济民 许立超 于 2020-05-26 设计创作，主要内容包括：本发明涉及一种智能螺栓系统以及轨道车辆制动系统的连接松紧检测方法,智能螺栓系统包括智能螺栓和超声波检测仪,所述智能螺栓包括螺栓本体、设在螺栓本体头部的压电陶瓷片、以及设置在螺栓本体头部的与螺栓本体相对应的身份标识,所述超声波检测仪包括数据储存处理器、显示屏、超声波探头、温度传感器、以及标识输入模块,所述数据储存处理器用于储存螺栓本体的应力特性信息,所述标识输入模块用于输入身份标识,所述标识输入模块与数据储存处理器相连,所述超声波探头、温度传感器和数据储存处理器都与显示屏相连。(The invention relates to an intelligent bolt system and a connection tightness detection method of a rail vehicle brake system, wherein the intelligent bolt system comprises an intelligent bolt and an ultrasonic detector, the intelligent bolt comprises a bolt body, a piezoelectric ceramic piece arranged at the head of the bolt body and an identity mark arranged at the head of the bolt body and corresponding to the bolt body, the ultrasonic detector comprises a data storage processor, a display screen, an ultrasonic probe, a temperature sensor and a mark input module, the data storage processor is used for storing stress characteristic information of the bolt body, the mark input module is used for inputting the identity mark, the mark input module is connected with the data storage processor, and the ultrasonic probe, the temperature sensor and the data storage processor are all connected with the display screen.)

1. An intelligent bolt system, its characterized in that: including intelligent bolt and ultrasonic detector, the intelligence bolt includes bolt body (1), establish piezoceramics piece (2) at bolt body (1) head and set up at bolt body (1) head with bolt body (1) corresponding identification, ultrasonic detector includes data storage treater, display screen (4), ultrasonic transducer (7), temperature sensor (6) and sign input module, the data storage treater is used for storing the stress characteristic information of bolt body (1), sign input module is used for inputing identification, sign input module links to each other with the data storage treater, ultrasonic transducer (7), temperature sensor (6) and data storage treater all link to each other with display screen (4).

2. The smart bolt system of claim 1, wherein: the information code is a two-dimensional code (3), and the identification input module is a scanning module (5).

3. The smart bolt system of claim 2, wherein: the two-dimensional code (3) is pasted on the piezoelectric ceramic piece (2).

4. The smart bolt system of claim 1, wherein: the thickness of the piezoelectric ceramic piece (2) is within 3 mm.

5. The smart bolt system of claim 1, wherein: the piezoelectric ceramic piece (2) is bonded to the head of the bolt body (1).

6. The smart bolt system of claim 1, wherein: the intelligent bolt comprises a plurality of intelligent bolts with bolt bodies (1) of different specifications, and the stress characteristic information of each specification of bolt body (1) is stored in a data storage processor.

7. A connection tightness detection method of a railway vehicle braking system is characterized by comprising the following steps: the intelligent bolt system is adopted, the intelligent bolt is used for connecting and fixing the joint of the rail vehicle brake system, and the connection tightness detection method comprises the following steps:

a1, after the intelligent bolt is manufactured, calibrating the bolt body (1) to obtain stress characteristic information of the bolt body, storing the stress characteristic information in a data storage processor of an ultrasonic detector, and corresponding the stress characteristic information data to the identity of the bolt body;

a2, after the intelligent bolt is installed, an ultrasonic detector is used for detecting the intelligent bolt, an identification input module is used for inputting the identification of the intelligent bolt to be detected, and a data storage processor calls corresponding stress characteristic information according to the identification and displays the stress characteristic information in a display screen (4); triggering the piezoelectric ceramic plate (2) by using an ultrasonic probe (7) to generate ultrasonic waves, acquiring the deformation quantity of the bolt body (1), and displaying the deformation quantity in the display screen (4); measuring the temperature of the bolt body (1) by using a temperature sensor (6), and displaying the temperature in a display screen (4); according to the temperature and the deformation of the bolt body (1), carrying out comparative analysis on the temperature and the deformation and the stress characteristic information to obtain the stress state of the bolt body (1);

A3, determining the tightness state of the joint of the bolt body (1) according to the stress information of the bolt body (1) acquired in A2.

Technical Field

The invention relates to the field of mechanical detection, in particular to an intelligent bolt system and a connection tightness detection method of a rail vehicle braking system.

Background

At present, in the field of rail transit, most of the current high-speed rail contact networks are connected by bolts. The intelligent bolt mainly comprises a high-speed rail contact net intelligent bolt with a looseness detection function, and in a Chinese invention patent with the application number of 2017100918233, the intelligent bolt mainly comprises a bolt main body and a nut, a cavity is arranged in an end cap part, a miniature circuit board is arranged in the cavity, and the miniature circuit board at least comprises an IC chip, an induction coil connected with the IC chip, a transmitting antenna and two leads; the induction coil terminal cap further comprises a gasket and a spring, wherein the spring is sleeved on the screw rod portion and located between the terminal cap portion and the gasket, a protruding contact towards the terminal cap portion is arranged on the gasket, the two lead wires can be screwed through the bolt, the terminal cap portion extends out of a via hole in the induction coil terminal cap portion, and the gasket and the connected part are connected respectively. The intelligent IC circuit and the small antenna are manufactured into a miniature circuit board, and a metal cap is matched as the antenna, so that the acquisition and wireless transmission of loosening information are realized, but the quantitative detection function of the stress state of the intelligent bolt cannot be realized in the prior art.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention provides an intelligent bolt system and a method for detecting connection tightness of a rail vehicle brake system, which can quantitatively obtain a stress state of a bolt body, improve bolt detection accuracy, and accurately determine a connection state of an intelligent bolt connection.

In order to achieve the purpose, the invention provides an intelligent bolt system which comprises an intelligent bolt and an ultrasonic detector, wherein the intelligent bolt comprises a bolt body, a piezoelectric ceramic piece arranged at the head of the bolt body and an identity mark arranged at the head of the bolt body and corresponding to the bolt body, the ultrasonic detector comprises a data storage processor, a display screen, an ultrasonic probe, a temperature sensor and an identity input module, the data storage processor is used for storing stress characteristic information of the bolt body, the identity input module is used for inputting the identity mark, the identity input module is connected with the data storage processor, and the ultrasonic probe, the temperature sensor and the data storage processor are all connected with the display screen.

Furthermore, the information code is a two-dimensional code, and the identification input module is a scanning module.

Further, the two-dimensional code is pasted on the piezoelectric ceramic chip.

Further, the thickness of the piezoelectric ceramic plate is within 3 mm.

Further, the piezoelectric ceramic plate is bonded to the head of the bolt body.

Further, a plurality of intelligent bolts with bolt bodies of different specifications are included, and the stress characteristic information of each specification of bolt body is stored in the data storage processor.

The invention also provides a connection tightness detection method of the rail vehicle braking system, which is carried out by adopting the intelligent bolt system and utilizes the intelligent bolt to connect and fix the joint of the rail vehicle braking system, and the connection tightness detection method comprises the following steps:

a1, after the intelligent bolt is manufactured, calibrating the bolt body to obtain the stress characteristic information of the bolt body, storing the stress characteristic information in a data storage processor of an ultrasonic detector, and corresponding the stress characteristic information data to the identity of the bolt;

a2, after the intelligent bolt is installed, detecting the intelligent bolt by using an ultrasonic detector, inputting the identity of the intelligent bolt to be detected by using an identity input module, and calling corresponding stress characteristic information by a data storage processor according to the identity to display the stress characteristic information on a display screen; triggering the piezoelectric ceramic plate by using an ultrasonic probe to generate ultrasonic waves, acquiring the deformation quantity of the bolt body, and displaying the deformation quantity in a display screen; measuring the temperature of the bolt body by using a temperature sensor, and displaying the temperature in a display screen; according to the temperature and the deformation quantity of the bolt body, carrying out comparative analysis on the temperature and the deformation quantity and the stress characteristic information to obtain the stress state of the bolt body;

And A3, determining the tightness state of the joint of the bolt body according to the stress information of the bolt body acquired in A2.

As described above, the intelligent bolt system and the connection tightness detection method according to the present invention have the following advantages:

the intelligent bolt and the ultrasonic detector are arranged, a bolt body of the intelligent bolt is calibrated, the stress characteristic information of the intelligent bolt is stored in a data storage processor of the ultrasonic detector, an identity of the intelligent bolt to be detected is input by using an identity input module, and the stress characteristic information corresponding to the intelligent bolt is called and displayed on a display screen; acquiring and displaying the deformation quantity of the bolt body by using the ultrasonic probe and the triggering piezoelectric ceramic piece; measuring the temperature of the bolt body by using a temperature sensor and displaying; therefore, the stress state of the bolt body can be obtained by comparing and analyzing the temperature and the deformation of the bolt body with the displayed stress characteristic information. The intelligent bolt system can realize quantitative detection of the stress state of the body, improve the accuracy of bolt detection, greatly improve the working efficiency, improve the performance of the bolt body and prolong the service life of the bolt body. The stress measurement in the bolt body can prevent accidents, ensure uniform stress of the bolt and optimize the design of the bolt body in the aspects of geometric dimension, quality and the like. The connection tightness detection method can accurately detect the tightness of the connection part, and the connection state is optimized.

Drawings

Fig. 1 is a schematic structural view of the smart bolt according to the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic structural view of the ultrasonic detector of the present invention.

Description of the element reference numerals

1 bolt body

2 piezoelectric ceramic piece

21 outer ring of metal material

22 PZT Material inner Ring

3 two-dimensional code

4 display screen

5 scanning module

6 temperature sensor

7 ultrasonic probe

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

Referring to fig. 1 to 3, the invention provides an intelligent bolt system, which comprises an intelligent bolt and an ultrasonic detector, wherein the intelligent bolt comprises a bolt body 1, a piezoelectric ceramic piece 2 arranged at the head of the bolt body 1, and an identity mark arranged at the head of the bolt body 1 and corresponding to the bolt body 1, the ultrasonic detector comprises a data storage processor (not shown in the drawing), a display screen 4, an ultrasonic probe 7, a temperature sensor 6, and a mark input module, the data storage processor is used for storing stress characteristic information of the bolt body 1, the stress characteristic information comprises a corresponding relation between stress and deformation and temperature, the mark input module is used for inputting the identity mark, the mark input module is connected with the data storage processor, and the ultrasonic probe 7, the temperature sensor 6 and the data storage processor are all connected with the display screen 4.

According to the intelligent bolt system, before the intelligent bolt is used, the bolt body 1 is calibrated, specifically, after the bolt bodies 1 of the same specification and manufactured in the same batch are manufactured, a certain number of bolt bodies 1 are extracted, the stress states of different bolts are calibrated by using an ultrasonic technology, the corresponding relation between the stress of the bolt bodies 1 of the batch and two factors (temperature and deformation) is obtained and is used as stress characteristic information, the stress characteristic information is stored into a database and is simultaneously stored into a data storage processor of an ultrasonic detector, the stress characteristic information data is marked by using an identity mark, the correspondence is kept, and the identity mark is used for subsequent data calling. The bolt bodies 1 of the same specification manufactured in the same batch have the same identity and stress characteristic information.

When the ultrasonic detector is used for detecting the intelligent bolt, the identity of the intelligent bolt to be detected is input by using the identity input module, and the data storage processor calls the corresponding stress characteristic information according to the identity and displays the stress characteristic information in the display screen 4; the ultrasonic probe 7 is used for triggering the piezoelectric ceramic piece 2 to generate ultrasonic waves, when the ultrasonic probe 7 contacts the piezoelectric ceramic piece 2, high-voltage electric pulses are generated and are added to the piezoelectric ceramic piece 2 to generate the ultrasonic waves, and when the ultrasonic waves are transmitted in the bolt body 1, the deformation quantity of the bolt body 1 can be obtained by measuring the speed and the variation quantity of the ultrasonic waves in the bolt body 1 and displayed in the display screen 4; measuring the temperature of the bolt body 1 by using a temperature sensor 6, and displaying the temperature in a display screen 4; the staff can compare the analysis with the stress characteristic information that shows according to the temperature and the deformation volume of bolt body 1, obtains the stress state of bolt body 1.

In the present invention, the piezoceramic sheet 2 is preferably bonded to the head of the bolt body 1, the piezoceramic sheet 2 comprises an outer ring 21 of metal material and an inner ring 22 of PZT material, and the working principle between the piezoceramic sheet 2 and the ultrasonic probe 7 is known in the prior art and will not be described in detail herein. The thickness of the piezoceramic wafer 2 is preferably within 3mm, facilitating the propagation (emission and echo) of the ultrasonic waves.

In the invention, the identity of the intelligent bolt can be a number, a bar code or a two-dimensional code 3, and the corresponding identity input module can be a keyboard or a scanning module 5, so as to realize the corresponding functions. Preferably, referring to fig. 1 and 3, in this embodiment, the identification is a two-dimensional code 3, which is adhered to the piezoelectric ceramic plate 2, and the identification input module is a scanning module 5, so that when in use, the scanning module 5 is only needed to scan the two-dimensional code 3, and the stress characteristic information of the bolt body 1 can be retrieved and displayed on the display screen 4.

The intelligent bolt system can comprise a plurality of intelligent bolts with bolt bodies 1 of different specifications, one ultrasonic detector correspondingly measures the plurality of intelligent bolts, the stress characteristic information of the bolt bodies 1 (with the same stress characteristic information) of each specification is stored in the data storage processor, when the intelligent bolt system is used, the scanning module 5 is only needed to scan the two-dimensional codes 3 of the different intelligent bolts, corresponding data at the position of the intelligent bolts are automatically retrieved, and the operation is flexible and convenient. The intelligent bolt delivers the corresponding database and the two-dimensional code 3 while delivering the user, and the user injects relevant information into the ultrasonic detector.

The intelligent bolt system can realize quantitative detection of the stress state of the bolt bodies 1 with various specifications, improve the accuracy of bolt detection, greatly improve the working efficiency, improve the performance of the bolt bodies 1 and prolong the service life of the bolt bodies. The stress measurement in the bolt body 1 can prevent accidents, ensure uniform stress of the bolt and optimize the design of the bolt body 1 in the aspects of geometric dimension, quality and the like. And can store its peculiar information of bolt body 1 in the database forever, be favorable to the engineer constantly perfecting the intelligent bolt stress state information in the database in the development process. The intelligent bolt system can be applied to various occasions, and particularly can be applied to a rail vehicle braking system.

The invention also provides a connection tightness detection method of the railway vehicle brake system, which is carried out by adopting the intelligent bolt system, and the intelligent bolt is adopted to connect and fix the connection position of the railway vehicle brake system suitable for bolt connection, wherein the connection tightness detection method comprises the following contents A1-A3:

a1, after the intelligent bolt is manufactured, calibrating the bolt body 1 to obtain stress characteristic information of the bolt body, storing the stress characteristic information in a data storage processor of an ultrasonic detector, and corresponding the stress characteristic information data to an identity label of the bolt body; specifically, for the same specification of bolt bodies 1 manufactured in the same batch, a certain number of bolt bodies 1 are extracted and the ultrasonic technology is applied to calibrate the stress states of different bolts, that is, the same specification of bolt bodies 1 in the batch have the same identity and stress characteristic information.

A2, after the intelligent bolt is installed, detecting the intelligent bolt by using an ultrasonic detector, inputting the identity of the intelligent bolt to be detected by using an identity input module, and calling corresponding stress characteristic information by a data storage processor according to the identity to display the stress characteristic information in a display screen 4; triggering the piezoelectric ceramic plate 2 by using the ultrasonic probe 7 to generate ultrasonic waves, acquiring the deformation quantity of the bolt body 1, and displaying the deformation quantity in the display screen 4; measuring the temperature of the bolt body 1 by using a temperature sensor 6, and displaying the temperature in a display screen 4; and according to the temperature and the deformation of the bolt body 1, performing comparative analysis on the temperature and the deformation and the stress characteristic information to obtain the stress information of the bolt body 1.

And A3, determining the tightness state of the joint of the bolt body 1 according to the stress information of the bolt body 1 acquired in A2.

According to the connection tightness detection method, stress monitoring of the bolt body 1 is achieved through the intelligent bolt system, the tightness state of the connection position can be monitored more accurately, the connection state is optimized, and accidents are prevented.

In conclusion, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.