CN112683509A

CN112683509A - Flexible screen surface tearing fault detection method and system

Info

Publication number: CN112683509A
Application number: CN202011528312.1A
Authority: CN
Inventors: 王新文; 徐宁宁; 林冬冬; 耿润辉
Original assignee: China University of Mining and Technology Beijing CUMTB
Current assignee: China University of Mining and Technology Beijing CUMTB
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-04-20

Abstract

The invention provides a method and a system for detecting tearing faults of a flexible screen surface. The distributed resistance sensor is arranged in the flexible sieve plate to be manufactured into a flexible sieve plate integrated with the two positions of the distributed resistance sensor, the whole monitoring circuit is connected into the wire interfaces at the two ends of the sieve plate, and the monitoring circuit comprises a wireless signal transmitting module, a multi-channel current data acquisition instrument and a power supply. When the flexible sieve plate breaks, built-in distributed resistance sensor can break thereupon, and then lead to distributed resistance sensor resistance to change, the monitoring lines can detect this kind of change signal and provide electronic computer, judge by the computer program whether take place to damage and indicate corresponding state the sieve, relaxation sieve generally has the polylith sieve, built-in distributed resistance sensor and multichannel current data acquisition instrument are parallelly connected respectively, consequently can judge concrete which sieve takes place to break, and then can reduce the time of investigation sieve fracture position.

Description

Flexible screen surface tearing fault detection method and system

Technical Field

The invention relates to the field of screening machinery and fault detection, in particular to a method and a system for detecting a tearing fault of a flexible screen surface.

Background

The flexible polyurethane sieve plate is a special sieve plate on a relaxation sieve, and generates relaxation motion under the action of the motion of two frames of the relaxation sieve so as to sieve discrete materials. With the development and wide application of the relaxation screen, some problems of the flexible screen plate are increasingly highlighted. The flexible sieve plate is made of flexible polyurethane material and is easily torn by sharp objects such as iron wires and the like to be damaged; the film is easy to thin and break under long-term abrasion; the bent portion is also easily broken due to the occurrence of relaxation deformation. The sieve plate damage of the flip-flow sieve can cause material leakage, the mismatching rate is greatly improved, and the sieving effect is seriously influenced. Therefore, it is necessary to provide a method and a system for detecting a tearing fault of a flexible screen plate on line, so as to find the fault in time.

At present, the detection technology aiming at the faults of the flexible sieve plate is less, and the prior art can not detect whether the flexible sieve plate cracks or not and the length of a crack.

In view of this, a method and a system for detecting a tearing fault of a flexible screen surface are needed to be designed, so that whether the tearing fault of the flexible screen plate occurs or not can be monitored on line, the phenomenon that the production quality is seriously affected when the tearing fault of the flexible screen plate is not found in time is avoided, and the efficient production is ensured.

Disclosure of Invention

One object of the present invention is to provide a method of detecting a tear failure in a flexible screening surface.

It is another object of the present invention to provide a flexible screening surface tear failure detection system that can detect if a screen panel has a tear failure in a timely manner.

In order to achieve the above object, the present invention provides a method and a system for detecting a tear failure of a flexible screening surface, wherein the test system comprises: the device comprises a distributed resistance sensor, a flexible sieve plate, a wire joint, a wire interface, a wireless signal transmitting module, a multi-channel current data acquisition instrument, a power supply, a wireless signal receiving module, a data acquisition instrument and an electronic computer. In the process of manufacturing the flexible sieve plate by casting, the distributed resistance sensor is arranged in a flexible sieve plate mould to manufacture a flexible sieve plate integrated with the distributed resistance sensor into a whole, wires are reserved at two ends of the sieve plate and connected with wire connectors, and the wire connectors are connected with wire interfaces and connected into the whole monitoring circuit. The monitoring circuit is connected with the wireless signal transmitting module, the multi-channel current data acquisition instrument and the power supply in series and then connected with the components of the distributed resistance sensors and the flexible sieve plate in a two-position integral mode in parallel. The wireless signal transmitting module of the monitoring circuit transmits signals to the wireless signal receiving module connected with the data acquisition instrument, and the data acquisition instrument converts the signals and transmits the signals to the electronic computer for processing. When flexible sieve break, built-in distributed resistance sensor also can produce the fracture, and because distributed resistance sensor and flexible sieve are two-position integrative parts, consequently the fracture position keeps unanimous, and can lead to distributed resistance sensor resistance to change, can judge that the sieve takes place to damage during resistance change, relaxation sieve generally has the polylith sieve, built-in distributed resistance sensor is parallelly connected with multichannel current data acquisition instrument, consequently can judge concrete sieve break-off, and then can reduce the time of investigation sieve fracture position.

Preferably, the distributed resistance sensor of the method selects a resistance wire with better ductility and conductivity, and avoids the breakage and the generation of higher heat when the screen surface is stretched.

Preferably, the power supply is a low-voltage power supply of 3.5V-5V, and the resistance wire of the distributed resistance sensor is prevented from generating larger heat through larger current.

Preferably, the multichannel current data acquisition instrument can receive a plurality of distributed resistance sensor electrical signals, combines after processing the signal into the signal that wireless signal emission module can receive and send, realizes that a plurality of flexible sieve boards carry out on-line measuring simultaneously.

Preferably, the electronic computer carries upper computer software, and upper computer software can be to current signal monitoring, judges whether the screen surface state is normal, if tear and can judge the sieve fracture position and report to the police.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a flexible screening surface tear fault detection method and system of the present invention;

FIG. 2 is a two-in-one component of the distributed resistive sensor and flexible screen of the present invention;

FIG. 3 is a distribution of distributed resistive sensors of the present invention in a flexible screen deck;

in the figure: 1-a distributed resistance sensor; 2-flexible sieve plate; 3-a wire joint; 4-a wire interface; 5-a wireless signal transmitting module; 6-a multi-channel current data acquisition instrument; 7-a power supply; 8-a wireless signal receiving module; 9-a data acquisition instrument; 10-electronic computer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

According to one aspect of the present invention, there is provided a flexible screening surface tear fault detection method and system, as shown in fig. 1, comprising: the device comprises a distributed resistance sensor 1, a flexible sieve plate 2, a wire joint 3, a wire interface 4, a wireless signal transmitting module 5, a multi-channel current data acquisition instrument 6, a power supply 7, a wireless signal receiving module 8, a data acquisition instrument 9 and an electronic computer 10.

In the process of manufacturing the flexible sieve plate 2 by casting, the distributed resistance sensor 1 is firstly placed in a mould of the flexible sieve plate 2 to manufacture a two-position integrated component of the distributed resistance sensor 1 and the flexible sieve plate 2, wires are left at two ends of the sieve plate to be connected with the wire connectors 3, and the wire connectors 3 and the wire interfaces 4 are connected to be connected with monitoring circuits as shown in figure 2. The monitoring circuit is connected in series with a wireless signal transmitting module 5, a multi-channel current data acquisition instrument 6 and a power supply 7, and then is connected in parallel with two integrated parts of the distributed resistance sensors 1 and the flexible sieve plate 2 to form the whole monitoring circuit.

The wireless signal transmitting module 5 of the monitoring circuit transmits signals to the wireless signal receiving module 8 connected with the data acquisition instrument 9, and the data acquisition instrument 9 converts the signals and transmits the converted signals to the electronic computer 10 for processing.

When flexible sieve 2 breaks, built-in distributed resistance sensor 1 also can break, as shown in fig. 3, because distributed resistance sensor 1 and flexible sieve 2 are two-position integrative parts, consequently, the position of breaking keeps unanimous, and can lead to distributed resistance sensor 1 resistance to change, can judge that the sieve takes place to damage during resistance change, relaxation sieve generally has the polylith sieve, built-in distributed resistance sensor 1 is parallelly connected with multichannel current data acquisition instrument 6, consequently, can judge concrete sieve break, and then can reduce the time of investigation sieve position of breaking.

Preferably, the distributed resistance sensor 1 of the method selects the copper-aluminum alloy resistance wire with good ductility and conductivity, and avoids breakage and high heat generation during screen surface stretching.

Preferably, the power supply 7 is a low-voltage power supply of 3.5V to 5V, which prevents the resistance wire of the distributed resistance sensor 1 from generating large heat through large current.

Preferably, the multichannel current data acquisition instrument 6 can receive the electric signals of the plurality of distributed resistance sensors 1, process the signals into signals which can be received and sent by the wireless signal transmitting module 5 and then combine the signals, and therefore the simultaneous online detection of the plurality of flexible sieve plates 2 is achieved.

Preferably, the electronic computer 10 carries upper computer software, the upper computer software can monitor the current signal, judge whether the screen surface state is normal through the current value that monitoring system adopted, if take place to tear can judge the sieve fracture position and report to the police.

The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.

Claims

1. The invention provides a method and a system for detecting tearing faults of a flexible screen surface, which are characterized in that the test system comprises: the device comprises a distributed resistance sensor (1), a flexible sieve plate (2), a wire joint (3), a wire interface (4), a wireless signal transmitting module (5), a multi-channel current data acquisition instrument (6), a power supply (7), a wireless signal receiving module (8), a data acquisition instrument (9) and an electronic computer (10); in the process of manufacturing the flexible sieve plate (2) and casting, the distributed resistance sensor (1) is arranged in a mould of the flexible sieve plate (2) to manufacture the flexible sieve plate (2) which is integrated with the distributed resistance sensor (1) into a whole, wires are left at two ends of the sieve plate to be connected with the wire connectors (3), and the wire connectors (3) are connected with the wire connectors (4) to be connected into the whole monitoring circuit; the monitoring circuit is formed by connecting a wireless signal transmitting module (5), a multi-channel current data acquisition instrument (6) and a power supply (7) in series and then connecting a plurality of distributed resistance sensors (1) which are arranged in the flexible sieve plate (2) in parallel; the wireless signal transmitting module (5) of the monitoring circuit transmits signals to the wireless signal receiving module (8) connected with the data acquisition instrument (9), the data acquisition instrument (9) converts the signals and transmits the converted signals to the electronic computer (10) for processing, and the software of the electronic computer (10) identifies the received signals and judges whether the sieve plate is torn or not and the torn position of the sieve plate according to the current change of each line.

2. The flexible screening surface tear fault detection method and system of claim 1, wherein: when flexible sieve (2) break off, built-in distributed resistance sensor (1) also can produce the fracture, and because distributed resistance sensor (1) and flexible sieve (2) are two-position integrative parts, consequently, the fracture position keeps unanimous, and can lead to distributed resistance sensor (1) resistance to change, can judge during the resistance change that the sieve takes place to damage, relaxation sieve generally has the polylith sieve, built-in distributed resistance sensor (1) is parallelly connected with multichannel current data acquisition instrument (6), consequently, can judge concrete sieve and take place the fracture, and then can reduce the time of investigation sieve fracture position.

3. The flexible screening surface tear fault detection method and system of claim 1, wherein: the distributed resistance sensor (1) of the method selects the resistance wire with better ductility and conductivity, and avoids the breakage and the generation of higher heat when the screen surface is stretched.

4. The flexible screening surface tear fault detection method and system of claim 1, wherein: the power supply (7) is a low-voltage power supply of 3.5V-5V, and the resistance wire of the distributed resistance sensor (1) is prevented from generating larger heat through larger current.

5. The flexible screening surface tear fault detection method and system of claim 1, wherein: the multichannel current data acquisition instrument (6) can receive a plurality of distributed resistance sensor (1) electric signals, and combines the signals after processing the signals into the signals that wireless signal emission module (5) can receive and send, realizes that a plurality of flexible sieve boards (2) carry out on-line measuring simultaneously.

6. The flexible screening surface tear fault detection method and system of claim 1, wherein: the electronic computer (10) is provided with upper computer software which can monitor the current signal and judge whether the state of the screen surface is normal or not, and if the screen surface is torn, the fracture position of the screen plate can be judged and an alarm is given.