阅读说明：本技术 一种带式输送机所用带式皮带的撕裂预警方法 (Tearing early warning method for belt type belt used for belt type conveyor ) 是由 韩玲 潘志刚 潘筠毅 于 2021-08-12 设计创作，主要内容包括：本发明涉及一种带式输送机所用带式皮带的撕裂预警方法。当检测到输送带即将断裂或已断裂的时候,对输送带驱动系统发出停机指令。避免发生危险及事故的扩大。(The invention relates to a tearing early warning method for a belt type belt used by a belt type conveyor. And when the conveyor belt is about to break or has broken, sending a stop instruction to the conveyor belt driving system. Avoiding the occurrence of danger and the expansion of accidents.)

1. A tearing early warning method for a belt type belt used by a belt type conveyor is characterized in that: implanting a metal wire into the center of the belt, wherein two ends are respectively an end 1 and an end 2; the metal wire end 1 is connected to a high level VCC; the IO port of the single chip microcomputer is in an input mode, and is connected with a metal wire end 2 in parallel; the singlechip circularly and repeatedly judges the level of the IO port; the single chip microcomputer has an RFID function, or can be externally connected with an RFID chip and implanted into the belt or externally connected with the outside of the belt; the single chip microcomputer circularly and repeatedly acquires the voltage of the metal wire end 1, judges the on-off condition of the metal wire through the voltage or high and low levels, and repeatedly sends a stop signal through the RFID; the card reader receives the RFID stop signal and sends a stop signal to the brake system; the metal wire is compositely installed in the belt: vulcanization or weaving or surface pasting.

2. The method of claim 1, wherein the wire is made of a heat-sensitive material and changes resistance according to a change in temperature.

3. The tearing early warning method for the belt type belt of the belt conveyor according to claim 2, wherein a singlechip IO port has an ADC voltage acquisition function and is connected with a metal wire end 1 in parallel; a pull-up resistor is connected between the metal wire end 1 and VCC, such as a voltage division circuit shown in FIG. 1; and the metal wire end 2 is connected with GND, and the singlechip circularly and repeatedly acquires the voltage of the metal wire end 1.

4. The method of claim 3, wherein the plurality of heat-sensitive wires are connected in parallel.

5. The method of claim 3, wherein the heat-sensitive wires are arranged in any shape.

6. The tearing warning method for the belt type belt of the belt conveyor as claimed in claim 5, wherein the operating temperature range of the belt is converted according to the voltage of the sampling point and the resistance values of the plurality of parallel strands.

7. The tear warning method for the belt of the belt conveyor as claimed in claim 2, wherein the single-chip microcomputer has a plurality of IO ports to implement the functions of the foregoing scheme at the same time.

8. The method of claim 1, wherein the RFID tag is a high frequency or ultra high frequency tag greater than 13.56 Mhz.

Technical Field

The invention relates to a tearing early warning method for a belt type belt used by a belt type conveyor. And when the conveyor belt is about to break or has broken, sending a stop instruction to the conveyor belt driving system. Avoiding the occurrence of danger and the expansion of accidents.

Background

Conveyor belts are used for conveying bulk, granular and bulk materials and pieces of materials in a wide variety of industrial applications. When hard massive materials are conveyed, the phenomenon that the materials crack or break a conveying belt of the conveyor often occurs, so that the belt conveyor cannot work normally, and production stop and great economic loss are caused.

The prior art is mainly reflected in the above 3 patents, wherein the core functions and the existing defects are as follows:

CN202704466U a novel conveyer belt anti-tear monitoring system: two pieces of conductive rubber are adopted, and the rubber has elasticity due to breakage, is easy to deform and continue to conduct electricity due to slow breakage time, has poor antistatic property and is easy to cause false alarm.

CN106241275B conveyer belt anti-tear monitoring devices based on passive RFID: the breakage of the belt is judged by the breakage of the RFID antenna. And requires a number of inspection modules and multiple modules to be mounted on the conveyor belt. The invention has complex structure, high failure rate and high cost, because the working environment of the conveyor belt is extremely harsh, the installation of too many sensors is not conditioned; the invention 2 has poor stability, high cost and large error!

CN105314357A conveyer belt anti-tear monitoring devices: most of the contents and principles of a novel conveyor belt anti-tearing monitoring system possibly inherited from CN202704466U are consistent.

Disclosure of Invention

A tearing early warning method for a belt type belt used by a belt type conveyor aims to solve the problems that the prior art is high in common cost, weak in sensitivity, incapable of sensitively arranging the whole belt, or large in equipment requirement. The invention provides a thermistor conductive material, which detects belt tearing perception in operation and carries out belt control intervention by acquiring adc voltage change caused by resistance change of the thermistor conductive material.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a method of warning of tearing of a belt used in a belt conveyor, the method comprising:

the method comprises the following steps: a metal wire is embedded in the center of the belt, and two ends are respectively an end 1 and an end 2.

Step two: the metal wire terminal 1 is connected to a high level VCC.

Step four: the IO port of the single chip is in an input mode and is connected with a metal wire end 2 in parallel.

Step five: the singlechip circularly and repeatedly judges the level of the IO port.

Step six: the single chip microcomputer has an RFID function, or can be externally connected with an RFID chip and implanted into the belt or externally connected with the belt.

Step seven: the single chip microcomputer circularly and repeatedly acquires the voltage of the metal wire end 1, judges the on-off condition of the metal wire through the voltage or high and low levels, and repeatedly sends a stop signal through the RFID.

Step eight: and the card reader receives the RFID stop signal and sends a stop signal to the brake system.

Step nine: the metal wire is compositely installed into the belt, including but not limited to: vulcanization, weaving, surface pasting and the like.

Further: the metal wire is a heat-sensitive material and can change resistance value according to the change of temperature.

Further: and the IO port of the single chip microcomputer has an ADC voltage acquisition function and is connected with a metal wire end 1 in parallel.

Further: a pull-up resistor is connected between the metal wire end 1 and VCC, as shown in fig. 1.

Further: the metal wire terminal 2 is connected to GND.

Further: the single chip microcomputer circularly and repeatedly acquires the voltage of the metal wire end 1.

Further: the thermosensitive metal wires are connected in parallel in a plurality of strands.

Further: the shape and length of the heat-sensitive wire can be changed at will.

Further: and converting the working temperature range of the belt according to the sampling point voltage and the resistance values of the multiple strands of parallel connection.

Further: the single chip microcomputer is provided with a plurality of IO ports to realize the functions of the scheme.

Further, the RFID used in the present invention is a high or ultra high frequency greater than 13.56 Mhz.

The invention has the following advantages:

by improving CN202704466U, two conductive rubbers are improved into a metal closed loop conductor, so that the material is saved, the metal wires are implanted into the belt, and the tensile strength of the belt is improved.

The closed loop, the wire can be extended to the width of the whole belt, and compared with the way of CN106241275B, the way of breaking the antenna or breaking the induction coil, can detect the breaking of the whole belt in a wider range. The amount of rfid in the belt is saved more.

The working temperature of the belt can be detected.

Drawings

Fig. 1 is a schematic diagram of the basic structure of the present invention.

Fig. 2 is a trace schematic diagram 1 of the present invention.

Fig. 3 is a trace schematic diagram 2 of the present invention.

FIG. 4 is a schematic diagram of the partial pressure of the structure adc of the present invention.

FIG. 5 is a schematic diagram of the partial pressure of the structure adc of the present invention.

Fig. 6 is a schematic diagram of the overall principle of the invention.

Fig. 7 is a trace schematic diagram 3 of the present invention.

In the figure, 1 is a lead end 1; 2. is a lead end 2; 3 is an RFID chip; 4. is a metal wire

Detailed Description

Embodiment 1: a metal closed loop wire is connected with an IO port in an input state through a mode of implanting a rubber conveyor belt, wherein one end of the wire is connected with 5V voltage, and the other end of the wire is connected with the IO port in an input state, and the wire is connected and broken through detecting whether the high and low level expression mode of the IO port is 0 or 1. Thereby achieving the purpose of identifying the completeness and the tearing of the conveyor belt. In this embodiment the belt conductors are arranged throughout the belt intermediate layer as shown in fig. 2 and in fig. 3. Compared with the scheme of two conductive rubbers, the embodiment has the advantages that the cost is saved, and the belt is reinforced through the metal wires.

Embodiment 2: a plurality of resistance wires are connected in parallel to form a resistance matrix which is distributed throughout the belt interlayer as shown in fig. 4. The embodiment can more sensitively judge the fracture position and detect the temperature of the belt.