CN210735377U

CN210735377U - Belt deviation detection device

Info

Publication number: CN210735377U
Application number: CN201921786194.7U
Authority: CN
Inventors: 杨德川
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-06-12
Anticipated expiration: 2029-10-23

Abstract

The utility model relates to a belt off tracking detection device belongs to position detection device. The utility model discloses main content, a belt off tracking detection device, it includes casing (1), hood (4), foil gage (2) and detection circuit board (3), its characterized in that: the shell (1) and the top cap (4) are integral parts, and the strain gauge (2) is fixedly connected to the inner wall of the shell; the detection circuit board (3) comprises a detection circuit and a microprocessor, and is arranged in the shell; the strain gauge (2) is electrically connected with the detection circuit, and the strain gauge sends out a detection signal according to the deformation condition of the strain gauge; the detection circuit transmits the received detection signal to the microprocessor, and the microprocessor compares and processes the detection signal and a set value. Adopt the technical scheme of the utility model afterwards, whole device is small, do not have the movable part, need not repacking belt, reliability height.

Description

Belt deviation detection device

Technical Field

The invention relates to a position detection device, in particular to a belt deviation detection device.

Background

For belt conveying equipment, particularly a bucket elevator, friction between a deviated belt and an equipment shell not only damages the belt, but also easily generates a large amount of heat, and is very easy to cause dust explosion. Therefore, the conveying equipment adopting the belt as a traction member must be provided with a belt deviation detection device, and the existing belt deviation detection device comprises: non-contact detection devices, temperature-based detection devices, mechanical detection devices, and the like.

In the belt deviation detection device in the prior art, the non-contact detection device is easy to misreport, or the belt needs to be modified, so that the application range is narrow; the temperature detection type has high requirement on the environmental temperature and is not suitable for occasions with large temperature difference; the contact type is large in size, large in action amplitude, high in action force, provided with a movable mechanism and easy to wear and fail.

In addition, for the application that the conveying equipment is small in size and high in dust concentration and the equipment is located in cold or hot regions, the belt deviation detection equipment in the prior art cannot well meet the requirements, so that the invention provides the novel belt deviation detection device.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a belt deviation detection device, which aims to realize the following purposes: the belt deviation detecting device solves the defects of the existing belt deviation detecting device, and is small in size, free of moving parts, free of belt modification and high in reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a belt off tracking detection device, its includes casing, hood, foil gage and detection circuitry board, its characterized in that: the shell and the top cap are integral parts, and the strain gauge is fixedly connected to the inner wall of the shell; the detection circuit board comprises a detection circuit and a microprocessor, and is arranged in the shell; the strain gauge is electrically connected with the detection circuit, and the strain gauge sends out a detection signal according to the self deformation condition; the detection circuit transmits the received detection signal to the microprocessor, and the microprocessor compares and processes the detection signal and a set value.

As an improvement of the present invention, the strain gauge is a resistance strain gauge or an optical strain gauge.

As an improvement of the utility model, foil gage and detection circuit electrical connection are half-bridge single armed bridging, half-bridge both arms bridging or full-bridge four arms bridging.

As an improvement of the utility model, it is a plurality of foil gage is radial symmetrical arrangement on shells inner wall.

As an improvement of the present invention, the number of the strain gauges is 4, and the strain gauges and the detection circuit are all-bridge four-arm bridges.

As an improvement of the present invention, the integral member is an elastically deformable member.

The invention aims at the defects of the prior art and provides a belt deviation detection method, which aims to realize the following purposes: the belt deviation detecting method is small in size, free of moving parts, free of belt modification and high in reliability.

a belt deviation detection method comprises the following steps:

step a, the detection circuit board comprises a detection circuit and a microprocessor; the shell and the top cap are an integral piece, the plurality of strain gauges are fixedly connected on the inner wall of the shell, and the strain gauges are electrically connected with the detection circuit;

b, according to the deformation condition of the shell, determining whether a detection signal is sent out and the strength of the sent detection signal by each strain gauge;

c, the detection circuit respectively transmits the received detection signals to the microprocessor;

d, comparing the detection signal with a set value by the microprocessor; the detection signal does not reach the set value, and the microprocessor does not send out an alarm signal; when the detection signal reaches a set value, the microprocessor sends out an alarm signal.

As an improvement of the utility model, a plurality of foil gages are radial symmetrical arrangement on shells inner wall.

The beneficial effect after adopting above-mentioned technical scheme:

1. the whole detection device/method has no moving rod. The housing is both a mounting structure and a load cell. The strain gauges are positioned on the inner wall of the shell, and according to the elastic deformation condition of each area of the shell, each strain gauge respectively sends out a detection signal, and the microprocessor determines whether to send out an alarm signal or not after processing. Therefore, the whole detection device/method has smaller volume and more reliable performance.

2. The shell and the top cap are integrated, the strain gauge is located on the inner wall of the shell, the detection circuit board is arranged in the shell, the structure is simple, no movable part is arranged, small acting force can be detected, and the application range is wide. Related parts are positioned in the shell, so that the environmental influences of temperature, moisture, dust and the like are reduced.

3. A plurality of foil gages are radially and symmetrically arranged on the inner wall of the shell, such as: the 4 strain gauges and the detection circuit are connected in a full-bridge four-arm bridge mode. Therefore, the elastic deformation condition of each area of the shell is detected through the distributed strain gauges, the micro-strain detection capability is improved, and the whole detection device/method is more sensitive.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic sectional view A-A of FIG. 1;

FIG. 3 is a flow chart of the present invention;

fig. 4 is an electrical schematic block diagram of the present invention.

In the figure:

1. a housing; 2. a strain gauge; 3. detecting the circuit board; 4. a top cap; 5. a belt.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific examples.

Example one

As shown in FIGS. 1-2, a belt off tracking detection device, it includes casing 1, hood 4, foil gage 2 and detection circuitry board 3, wherein:

the shell 1 and the top cap 4 are an integral piece, and the strain gauge 2 is fixedly connected on the inner wall of the shell;

the detection circuit board 3 comprises a detection circuit and a microprocessor, the detection circuit usually comprises a differential circuit and a digital-to-analog conversion circuit, and the detection circuit board is arranged in the shell;

the strain gauge 2 is electrically connected with the detection circuit, and the strain gauge sends out a detection signal according to the self deformation condition;

the detection circuit transmits the received detection signal to the microprocessor, and the microprocessor compares and processes the detection signal with a set value.

The strain gauge is preferably a resistance strain gauge or an optical strain gauge.

The strain gauge and the detection circuit are electrically connected with a half-bridge single-arm bridge, a half-bridge double-arm bridge or a full-bridge four-arm bridge.

The aforementioned monolithic member is preferably an elastically deformable member such as: the elastic deformation piece processed by the plastic has better elastic strain performance.

A corresponding specific method, as shown in fig. 3, is a belt deviation detecting method, which includes the following steps:

c, the detection circuit respectively transmits the received detection signals to the microprocessor; the specific transmission mode is preferably as follows: the detection signal sent by the strain gauge is amplified by a differential amplifying circuit on the detection circuit and then converted into digital quantity by a digital-to-analog conversion circuit, and the digital quantity is finally transmitted to a microprocessor through a data exchange protocol;

For convenience of understanding, taking 4 strain gauges as an example, the following is specifically explained: as shown in fig. 4: r1, R2, R3 and R4 are strain gauges fixed on the shell to form a full-bridge four-arm bridge, when the strain gauges deform, analog quantity signals are output, the signals are amplified by a difference circuit FGA and then transmitted to a digital-to-analog conversion circuit ADC, the digital-to-analog conversion circuit ADC converts the amplified analog quantity signals into corresponding digital quantity signals, the signals are transmitted to a microprocessor MCU through a data exchange protocol, and the microprocessor MCU compares detection signals with set values; the detection signal does not reach the set value, and the microprocessor MCU does not send out an alarm signal; when the detection signal reaches a set value, the microprocessor MCU sends out an alarm signal. The model that the above-mentioned microprocessing MCU can adopt includes STM8S 103K.

Specifically, as shown in fig. 1, the detecting device is installed on one side or both sides of the belt. When the belt 5 deviates, the belt 5 is in contact with the top cap 4, and the shell surface is reversibly deformed by external force applied by the belt. According to the deformation condition of each relevant area surface of the shell, each strain gauge determines whether to send out a detection signal and the strength of the sent detection signal. If the strain gauge generates a detection signal due to deformation, the magnitude of the detection electric signal directly reflects the magnitude degree of the external force action. The detection circuit respectively transmits the received detection signals to the microprocessor, and the microprocessor compares the detection signals with a set value; the detection signal does not reach the set value, and the microprocessor does not send out an alarm signal; when the detection signal reaches a set value, the microprocessor sends out an alarm signal. When the belt 5 is reset, the top cap 4 has no lateral force, the elastic strain of the shell surface disappears, the strain gauge 2 has no signal to send out, the alarm is relieved, and the device/method is reset for standby.

The utility model provides a casing is not only force cell but also mount pad, can hold foil gage and detection circuit board again, again because what detect is the small meeting an emergency of casing, sensitivity is high, does not have moving part, and hood 4 and casing 1 are concreties the overall structure together simultaneously, have omnidirectional response ability and anti unbalance loading ability. The device or the method has smaller volume and better performance.

Example two

As an improvement of the first embodiment of the present invention, as shown in fig. 1-2, the aforementioned strain gauge 2 and the detection circuit are electrically connected to form a half-bridge single-arm bridge, a half-bridge double-arm bridge or a full-bridge four-arm bridge.

The plurality of strain gauges are radially and symmetrically arranged on the inner wall of the shell. Wherein: and 4 strain gages are selected as the optimal selection, and the strain gage 2 and the detection circuit are in full-bridge four-arm connection.

The present invention is not limited to the above embodiments, and all technical solutions formed by equivalent replacement or equivalent replacement belong to the scope of the claimed invention.

Claims

1. The utility model provides a belt off tracking detection device, its includes casing (1), hood (4), foil gage (2) and detection circuit board (3), its characterized in that:

the shell (1) and the top cap (4) are integral parts, and the strain gauge (2) is fixedly connected to the inner wall of the shell;

the detection circuit board (3) comprises a detection circuit and a microprocessor, and is arranged in the shell;

the strain gauge (2) is electrically connected with the detection circuit, and the strain gauge sends out a detection signal according to the deformation condition of the strain gauge;

the detection circuit transmits the received detection signal to the microprocessor, and the microprocessor compares and processes the detection signal and a set value.

2. The belt deviation detecting device according to claim 1, wherein: the strain gauge is a resistive strain gauge or an optical strain gauge.

3. The belt deviation detecting device according to claim 1, wherein: the strain gauge (2) is electrically connected with the detection circuit by a half-bridge single-arm bridge, a half-bridge double-arm bridge or a full-bridge four-arm bridge.

4. The belt deviation detecting device according to claim 3, wherein: the plurality of strain gauges are radially and symmetrically arranged on the inner wall of the shell.

5. The belt deviation detecting device according to claim 4, wherein: the number of the strain gauges is 4, and the strain gauges (2) and the detection circuit are in full-bridge four-arm connection.

6. The belt deviation detecting device according to claim 1, wherein: the integral piece is an elastically deformable piece.