CN112083058A - Signal acquisition and processing device suitable for broken wire detection of steel wire rope of multi-row pulley block - Google Patents

Abstract

A signal acquisition and processing device suitable for multi-row pulley block steel wire rope broken wire detection comprises an electromagnet, a Hall module, a permanent magnet, a power module and a signal acquisition and processing module. The electromagnet and the Hall module are matched to form a circular ring structure, a closed circular hole is formed in the middle of the circular ring structure, the steel wire rope penetrates through the circular hole, the permanent magnet is fixed on the surface of the Hall module, the power supply module is respectively connected with the electromagnet and the permanent magnet, and the Hall module is connected with the signal acquisition and processing module. The signal acquisition and processing device is suitable for detecting the broken wire of the steel wire rope of the multi-row pulley block, greatly improves the acquisition efficiency of the broken wire signal of the steel wire rope for the ship lift, and is simple and convenient to operate.

Description

A Signal Acquisition and Processing Applicable to Wire Rope Broken Detection of Multi-row Pulley Blocks device

technical field

The invention relates to the technical field of wire rope broken wire detection, in particular to a signal acquisition and processing device suitable for wire rope broken wire detection of multi-row pulley blocks.

Background technique

In the working process of the ship lift, the wire rope plays an important role. In the process of rising and falling of the cabin, the steel wire rope bears huge tensile stress, and its mechanical properties will directly affect whether the ship lift can operate safely. Accidents are not allowed, otherwise the consequences will be extremely disastrous. Therefore, the staff must regularly test the mechanical properties of the wire rope, among which the broken wire detection is particularly important. In the past broken wire detection, the main method adopted is the observation method, and since the surface of the wire rope is covered with thick grease, the reliability of this method needs to be improved. Now in the wire rope broken wire detection, the most widely used is the magnetic flux leakage detection method, and the conventional method of the magnetic flux leakage detection method is to attach a Hall module on the surface of the wire rope to be detected. This method is cumbersome to operate and prone to magnetic flux leakage.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the present invention provides a signal acquisition and processing device suitable for the detection of wire rope breakage in multi-row pulley blocks, which can ensure that the magnetic flux leakage signal can be fully collected and processed while the wire rope is moving; The advantages of easy disassembly and assembly and simple operation are suitable for continuous detection operation of wire ropes of multiple rows of pulleys.

The technical scheme adopted in the present invention is:

A signal acquisition and processing device suitable for wire rope breakage detection of multi-row pulley blocks comprises an electromagnet, a Hall module, a permanent magnet, a power supply module, and a signal acquisition and processing module. The electromagnet and the Hall module cooperate to form a ring structure, a closed circular hole is formed in the middle, the wire rope passes through the circular hole, the permanent magnet is fixed on the surface of the Hall module, the power module is respectively connected to the electromagnet and the permanent magnet, and the Hall module is connected to the signal acquisition with the processing module.

The power supply module is used for outputting high frequency AC constant current power supply and constant current power supply, the high frequency AC constant current power supply is used for providing power supply for the electromagnet, and the constant current power supply is used for supplying power supply for the Hall module.

The high-frequency AC constant-current power output port of the power module is communicated with the electromagnet through a cable, and the connection between the cable and the electromagnet is in the form of a detachable quick connector.

The Hall module and the mounting surface of the electromagnet are wedge-shaped structures that cooperate with each other, and play the role of positioning and guiding.

The Hall module and the electromagnet are respectively installed on the first base plate and the second base plate;

The device further includes a first base and a second base, on which a first guide rail slider and a second guide rail slider are respectively installed; the first base plate is matched with the first base through the first guide rail slider The second base plate is matched with the second base through the second guide rail slider, and the Hall module and the electromagnet move toward each other along the radial direction of the wire rope through the first and second guide sliders respectively.

The bottom surfaces of the first base and the second base are equipped with four walking wheels and one guide wheel, the upper wheel groove of the guide wheel is assembled with a track, and the length of the track is greater than the length of a row of pulley blocks. It is ensured that the moving stroke of the device in the track can cover the range of a row of pulley blocks, and all the wire ropes within the range are detected to realize the rapid movement and positioning of the device.

The cross section of the electromagnet is a smaller arc structure with an arc length less than that of a semi-circular arc, the cross section of the Hall module is a larger arc structure with an arc length greater than the semi-circular arc length, the smaller arc structure and the larger arc structure are The arc structure cooperates to form a ring structure.

The present invention is a signal acquisition and processing device suitable for wire rope broken wire detection of multi-row pulley blocks, which greatly improves the collection efficiency of wire rope broken wire signals for ship lifts, and is simple and convenient to operate.

Description of drawings

FIG. 1 is a schematic diagram of a front view installation structure of the present invention.

FIG. 2 is an enlarged view of part A of FIG. 1 .

FIG. 3 is a schematic side view of the installation structure of the present invention.

FIG. 4 is an enlarged view of part B of FIG. 3 .

FIG. 5 is a schematic structural diagram of the present invention.

FIG. 6 is a schematic diagram of the assembly of the electromagnet and the Hall module of the present invention.

Detailed ways

As shown in Figures 1 to 6, a signal acquisition and processing device suitable for wire rope breakage detection of multi-row pulleys includes electromagnet 3, Hall module 4, permanent magnet 5, power module 6, signal acquisition and processing module 7. The wire rope 2 is located on the pulley block 1 .

The electromagnet 3 cooperates with the Hall module 4 to form a ring structure, a closed circular hole is formed in the middle, the wire rope 2 passes through the circular hole, the permanent magnet 5 is fixed on the surface of the Hall module 4, and the power module 6 is respectively connected to the electromagnet 3 and the permanent magnet. 5. The Hall module 4 is connected to the signal acquisition and processing module 7 .

The power supply module 6 is used for outputting high frequency AC constant current power supply and constant current power supply, the high frequency AC constant current power supply is used to provide power supply to the electromagnet 3 , and the constant current power supply is used to supply power supply to the Hall module 4 .

The high frequency AC constant current power output port of the power module 6 is connected with the electromagnet 3 through a cable, and the connection between the cable and the electromagnet 3 is in the form of a detachable quick connector.

The mounting surfaces of the Hall module 4 and the electromagnet 3 are wedge-shaped structures that cooperate with each other, and play a role of positioning and guiding.

The Hall module 4 and the electromagnet 3 are respectively installed on the first base plate 8 and the second base plate;

The device further includes a first base 10 and a second base, on which are respectively installed a first guide rail slider 9 and a second guide rail slider.

The first base plate 8 cooperates with the first base 10 through the first guide rail slider 9, and the second base plate cooperates with the second base through the second guide rail slider. The slider of the rail slider is fixed at the bottom of the base plate. A handle is installed on the bottom plate. The handle is operated to facilitate the movement of the bottom plate 8 along the guide rail, and to ensure that the electromagnet 3 and the Hall module 4 are separated or closed.

As seen from FIG. 2 , the power module 6 is placed on the first base plate 8 , and the power module 6 moves synchronously with the first base plate 8 to avoid secondary transportation.

The Hall module 4 and the electromagnet 3 move toward each other in the radial direction of the wire rope 2 through the first and second guide rail sliders respectively.

Four walking wheels 11 and one guide wheel 12 are installed on the bottom surfaces of the first base 10 and the second base. The upper groove of the guide wheel 12 is assembled with a track 13, and the length of the track 13 is greater than that of a row of pulleys.

The cross section of the electromagnet 3 is a smaller arc structure with an arc length less than that of a semicircular arc, and the cross section of the Hall module 4 is a larger arc structure with an arc length greater than the semicircular arc length. The large arc structure cooperates to form a ring structure.

The contact surface of the Hall module 4 and the electromagnet 3 is smaller than the cross-section through the center of the circle, the wrapping area of the Hall module 4 is increased, and the detection accuracy is improved. The influence is small and the stability of the device is guaranteed. A closed circular hole is formed in the middle of the assembly of the electromagnet 3 and the Hall module 4, the wire rope 2 passes through the circular hole, and the diameter of the wire rope 2 is smaller than the diameter of the circular hole.

Hall module 4 includes multiple magnetic Hall sensors SS94A2D, which are embedded in a circular arc structure, and are evenly arranged along the circle, which is convenient for overall movement; it does not need to be attached to the detected steel wire rope separately and multiple times. High detection accuracy and reduced labor.

The signal acquisition and processing module 7 includes an amplifier LM741, an A/D converter ADC0809, a single-chip microcomputer AT89C51, a digital tube, and a buzzer; the Hall module 4 is connected to the amplifier LM741, and the amplifier LM741 is connected to the A/D converter ADC0809, A/D The converter ADC0809 is connected to the single chip AT89C51, and the single chip AT89C51 is connected to the digital tube and the buzzer respectively.

The magnetic flux leakage signal is induced by the Hall module 4 to form a voltage signal output, and the A/D converter ADC0809 will perform analog-to-digital conversion on the transmitted analog voltage signal, and then process the data through the single-chip AT89C51, and send the data to the digital tube. It is displayed, and the buzzer alarm works at the same time. It is simple and intelligent to detect the broken wire of the steel wire by detecting the magnetic flux leakage of the steel wire rope, and the result is reliable, and the interference of some human factors is excluded.

A method for broken wire detection of steel wire ropes suitable for multi-row pulley blocks. The output constant current power supply powers on the Hall module 4; the signal acquisition and processing module 7 collects and processes the broken wire signal of the wire rope 2; after the signal acquisition and processing is completed, the electromagnet 3 is powered off, and the electromagnet 3 and the Hall module 4 are operated to slide along the guide rail. The blocks move toward each other until they are completely disengaged, move the two bases along the guide rail to the next wire rope, and repeat the signal acquisition.

working principle:

The two bases move along the track 13, the electromagnet 3 and the Hall module 4 reach the wire rope 2 to be detected, and the electromagnet 3 and the Hall module 4 are operated to approach each other along the guide rail slider 9, and the wire rope 2 is located between the electromagnet 3 and the Hall module. 4. A closed circular hole is formed in the middle of the assembly, and the power module 6 outputs a high-frequency AC constant current power supply to energize the electromagnet 3. After the electromagnet 3 obtains magnetism, it is tightly attached to the permanent magnet 5 on the surface of the Hall module 4 and moves on the wire rope. When the power supply module 6 outputs a constant current power supply to power on the Hall module 4 , the Hall module 4 collects the broken wire signal and enters the signal acquisition and processing module 7 .

After the signal collection is completed, the electromagnet 3 is powered off, the Hall module 4 is disconnected from the electromagnet 3, the electromagnet 3 and the Hall module 4 are operated to move toward each other along the guide rail slider until they are completely disengaged, and the two bases are operated to move along the track 13. , the electromagnet 3 and the Hall module 4 arrive at the next wire rope 2 to be detected, and collect and process the broken wire signal of the next wire rope.

Claims (8)

1. The utility model provides a signal acquisition and processing apparatus suitable for multirow assembly pulley wire rope broken wire detects, includes electro-magnet (3), hall module (4), permanent magnet (5), power module (6), signal acquisition and processing module (7), its characterized in that: electromagnet (3) and hall module (4) cooperation constitute a ring structure, and the centre forms and seals the round hole, and wire rope (2) pass the round hole, and permanent magnet (5) are fixed on hall module (4) surface, and electromagnet (3), permanent magnet (5) are connected respectively in power module (6), and hall module (4) are connected signal acquisition and processing module (7).

2. The signal acquisition and processing device suitable for wire breakage detection of a steel wire rope of a multi-row pulley block according to claim 1, wherein: the power module (6) is used for outputting a high-frequency alternating current constant current power supply and a constant current power supply, the high-frequency alternating current constant current power supply is used for providing a power supply for the electromagnet (3), and the constant current power supply is used for providing a power supply for the Hall module (4).

3. The signal acquisition and processing device suitable for wire breakage detection of a steel wire rope of a multi-row pulley block according to claim 1, wherein: the high-frequency alternating current constant current power supply output port of the power supply module (6) is communicated with the electromagnet (3) through a cable, and the joint of the cable and the electromagnet (3) is in a detachable quick joint form.

4. The signal acquisition and processing device suitable for wire breakage detection of a steel wire rope of a multi-row pulley block according to claim 1, wherein: the installation surfaces of the Hall module (4) and the electromagnet (3) are wedge-shaped structures which are matched with each other, and the positioning and guiding effects are achieved.

5. The signal acquisition and processing device suitable for wire breakage detection of a steel wire rope of a multi-row pulley block according to claim 1, wherein: the Hall module (4) and the electromagnet (3) are respectively arranged on the first bottom plate (8) and the second bottom plate;

the device also comprises a first base (10) and a second base, wherein a first guide rail sliding block (9) and a second guide rail sliding block are respectively arranged on the first base (10) and the second base;

the first bottom plate (8) is matched with the first base (10) through a first guide rail sliding block (9), the second bottom plate is matched with the second base through a second guide rail sliding block,

the Hall module (4) and the electromagnet (3) move in opposite directions along the radial direction of the steel wire rope (2) through the first guide rail slide block and the second guide rail slide block respectively.

6. The signal acquisition and processing device suitable for wire breakage detection of a steel wire rope of a multi-row pulley block according to claim 1, wherein: four walking wheels (11) and a leading wheel (12) are all installed to first base (10), second base bottom surface, wheel groove and track (13) assembly on leading wheel (12), track (13) length is greater than one row of assembly pulley length.

7. The signal acquisition and processing device suitable for wire breakage detection of a steel wire rope of a multi-row pulley block according to claim 1, wherein: the cross section of the electromagnet (3) is of a smaller arc structure with the arc length smaller than the arc length of the semicircle, the cross section of the Hall module (4) is of a larger arc structure with the arc length larger than the arc length of the semicircle, and the smaller arc structure and the larger arc structure are matched to form a circular ring structure.

8. The wire breakage detection method for the steel wire rope by adopting the signal acquisition and processing device as claimed in any one of claims 1 to 7, is characterized in that: the power supply module (6) outputs a high-frequency alternating current constant current power supply to electrify the electromagnet (3), the electromagnet (3) is electrified and automatically adsorbed together with the permanent magnet (5), and when the steel wire rope (2) moves, the power supply module (6) outputs a constant current power supply to electrify the Hall module (4); the signal acquisition and processing module (7) acquires and processes a wire breakage signal of the steel wire rope (2); after signal acquisition and processing are completed, the electromagnet (3) is powered off, the electromagnet (3) and the Hall module (4) are operated to move in opposite directions along the guide rail sliding block until the electromagnet and the Hall module are completely separated, the two bases are moved to the next steel wire rope along the guide rail, and signal acquisition is repeated.

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