Vertical shaft cage shoe gap detection device and method

Abstract

The invention provides a vertical shaft cage shoe gap detection device and method. The vertical shaft cage shoe gap detection device mainly comprises a first distance measuring column, a first distance measuring sensor, a second distance measuring column and a second distance measuring sensor. The first distance measuring sensor is arranged on the first distance measuring column and is used for measuring the distance from the first distance measuring column to the cage shoe; the second distance measuring sensor is arranged on the second distance measuring column to measure the distance from the second distance measuring column to the cage guide. According to the invention, distance measurement is carried out on the cage guide and the cage shoe respectively, and then measured data is calculated to determine whether the gap value between the cage guide and the cage shoe is in a safe range, so that the measured result is more accurate, the problem of inaccurate measurement result caused by traditional direct measurement of the gap between the cage shoe and the cage guide is avoided, and meanwhile, the distance measurement sensor can be used for continuous measurement; and continuously measuring in all operation periods of the cage. The problems that a traditional gap measurement technology is low in measurement precision and low in automation degree are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine cage safety monitoring, in particular to a vertical shaft cage ear gap detection device and method. BACKGROUND

[0002] In a mine vertical shaft hoisting system, the cage is the core equipment for transporting personnel, ore and materials, and its safe operation is crucial. In the operation of the cage, the cage guide is a guide rail fixed in the shaft, and the cage ear is a guide roller installed on the cage. The cage guide and the cage ear together constitute the guide mechanism of the cage operation. The gap between the cage ear and the cage guide is a key parameter to ensure the stable operation of the cage and prevent the accidents of cage jamming and falling. If the gap is too small, it is easy to cause the cage jamming accident, resulting in equipment damage. If the gap is too large, it will cause the cage to run with increased swing, not only accelerating the wear of the cage guide and the cage ear, but also possibly affecting the working performance of the anti-falling device. Therefore, accurate measurement of the gap is crucial to ensure the safety of mine production.

[0003] However, the existing cage ear gap detection technology still has some deficiencies. First, most of the existing technologies directly measure the dynamic gap between the cage ear and the cage guide. However, during the operation of the cage, this gap value is small and changes rapidly, and direct measurement is difficult to achieve high precision and high reliability in technology. Second, most of the traditional detection methods require manual participation, and the measurement accuracy depends on the experience of the operator, relying on manual reading or operation. In the dark, damp and limited space of the underground environment, the measurement efficiency is low, and the accuracy and reliability of the measurement data are difficult to guarantee. Manual measurement also has safety hazards. In addition, the traditional detection method cannot realize continuous and real-time detection, and it is difficult to discover abnormal changes in the gap in time. SUMMARY

[0004] The main purpose of the present application is to provide a vertical shaft cage ear gap detection device and method to at least solve the problems of low measurement accuracy and low automation of existing cage ear gap detection technology.

[0005] In order to achieve the above object, the present application provides a vertical shaft cage gap detection device, comprising: a ranging sensor base connected with a cage base; a first ranging column arranged on the ranging sensor base; a first ranging sensor arranged on the first ranging column, the cage base is provided with a cage, the side of the cage away from the first ranging column is provided with a cage way, the cage way extends along the vertical direction, and the first ranging sensor is used for measuring the second distance B from the first ranging column to the cage; a second ranging column arranged on the ranging sensor base; a second ranging sensor arranged on the second ranging column to measure the first distance A from the second ranging column to the cage way; a transmission module arranged in the ranging sensor base, the transmission module is connected with the first ranging sensor and the second ranging sensor, and receives the first distance A and the second distance B; a controller connected with the transmission module; the controller is used for receiving and determining the vertical shaft cage gap based on the first distance A and the second distance B.

[0006] Further, the transmission module comprises a signal interaction type I / O module, the I / O module is arranged in the ranging sensor base, the input end of the I / O module is connected with the signal output end of the first ranging sensor and the second ranging sensor respectively, so as to receive and convert the signal format of the first distance A and the second distance B, and the output end of the I / O module is connected with the signal input end of the controller, so as to transmit the adapted measurement information to the controller.

[0007] Further, the vertical shaft cage gap detection device further comprises an alarm unit connected with the controller, and the controller is further used for controlling the alarm unit to send an alarm signal when the measurement information meets a preset condition.

[0008] Further, the vertical shaft cage gap detection device further comprises a display connected with the controller, used for displaying the vertical shaft cage gap data information.

[0009] The present application also provides a vertical shaft cage gap detection method, the detection method comprising: The first ranging column and the second ranging column are arranged on the side of the cage way, the first ranging sensor is arranged on the first ranging column, and the second ranging sensor is arranged on the second ranging column; the second distance B from the first ranging column to the outer surface of the cage is obtained by the first ranging sensor, and the first distance A from the second ranging column to the surface of the cage way is obtained by the second ranging sensor; the controller obtains the first distance A and the second distance B to calculate the vertical shaft cage gap.

[0010] Further, the controller controls the alarm unit to send an alarm signal when the shaft cage ear gap meets a preset condition, the controller calculates a gap overrun value C according to a formula C=(A-B)-D based on the first distance A, the second distance B, and a preset allowable width D between the cage guide and the cage ear, and the preset condition includes: when the gap overrun value C is less than or equal to 0, the controller stops outputting a control signal to the alarm unit; when the gap overrun value C is greater than 0 and less than or equal to a first preset value, the controller controls the alarm unit to send a risk alarm signal; and when the gap overrun value C is greater than the first preset value, the controller controls the alarm unit to send a danger alarm signal.

[0011] Further, the first distance sensor and the second distance sensor are implemented by at least one of the following technologies: laser ranging technology, ultrasonic ranging technology, image recognition technology, or mechanical sensor technology.

[0012] Further, after the first distance sensor and the second distance sensor are set, a reference calibration step is further included, and the reference calibration step specifically includes: acquiring a first reference distance A0 and a second reference distance B0 when the gap between the cage ear and the cage guide is 0, and calculating an initial compensation amount E according to a formula E=A0-B0, so as to correct the first distance A and the second distance B measured during the operation of the cage, and the formula of the corrected gap overrun value C0 is: C0=[(A-B)-D]-E.

[0013] Further, the sampling frequency of the first distance sensor on the second distance B and the sampling frequency of the second distance sensor on the first distance A are both 50 Hz.

[0014] Further, the detection method further includes setting multiple sets of detection devices that are independent of each other and have fixed relative positions around the cage guide to obtain multiple sets of gap overrun values C.

[0015] The vertical shaft cage lug gap detection device and method of the present application comprises a ranging sensor base, a first ranging column, a first ranging sensor, a second ranging column, a second ranging sensor, a transmission module and a controller. The ranging sensor base is connected with the cage lug base; the first ranging column is arranged on the ranging sensor base; the first ranging sensor is arranged on the first ranging column; the cage lug base is provided with a cage lug, and the cage lug is provided with a cage way away from the first ranging column; the cage way extends along the vertical direction, and the first ranging sensor is used for measuring the second distance B from the first ranging column to the cage lug; the second ranging column is arranged on the ranging sensor base; the second ranging sensor is arranged on the second ranging column to measure the first distance A from the second ranging column to the cage way; the transmission module is arranged in the ranging sensor base, and the transmission module is connected with the first ranging sensor and the second ranging sensor and receives the first distance A and the second distance B; the controller is connected with the transmission module; and the controller is used for receiving and determining the vertical shaft cage lug gap based on the first distance A and the second distance B. The ranging sensor and the second ranging sensor are used for measuring the distance of the cage lug and the cage way respectively, and then the measured data is calculated to determine whether the gap value between the cage way and the cage lug is within the safe range, so that the measured result is more accurate, and the problem of inaccurate measurement result caused by the traditional direct measurement of the gap between the cage lug and the cage way is avoided. Meanwhile, the ranging sensor can be used for continuous measurement, and the measurement is continuously performed during all periods of cage operation. The problems of low measurement accuracy and low automation degree of the traditional gap measurement technology are solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings constituting a part of the specification illustrate the present application and are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a structure schematic view of an optional vertical shaft cage lug gap detection device according to an embodiment of the present application; Figure 2 It is a flow chart of an optional vertical shaft cage lug gap detection method according to an embodiment of the present application.

[0017] Reference signs: 10, ranging sensor base; 20, cage lug base; 30, first ranging column; 40, first ranging sensor; 50, second ranging column; 60, second ranging sensor; 70, cage way; 80, transmission module; 90, cage lug. DETAILED DESCRIPTION

[0018] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0019] As Figure 1As shown, the vertical shaft cage ear gap detection device of the present application comprises a ranging sensor base 10, a first ranging column 30, a first ranging sensor 40, a second ranging column 50, a second ranging sensor 60, a transmission module 80 and a controller. The ranging sensor base 10 is connected with the cage ear base 20; the first ranging column 30 is arranged on the ranging sensor base 10; the first ranging sensor 40 is arranged on the first ranging column 30, the cage ear base 20 is provided with a cage ear 90, the side of the cage ear 90 away from the first ranging column 30 is provided with a cage way 70, the cage way 70 extends along the vertical direction, and the first ranging sensor 40 is used to measure the second distance B from the first ranging column 30 to the cage ear 90; the second ranging column 50 is arranged on the ranging sensor base 10; the second ranging sensor 60 is arranged on the second ranging column 50 to measure the first distance A from the second ranging column 50 to the cage way 70; the transmission module 80 is arranged in the ranging sensor base 10, the transmission module 80 is connected with the first ranging sensor 40 and the second ranging sensor 60, and receives the first distance A and the second distance B; the controller is connected with the transmission module 80; the controller is used to receive and determine the vertical shaft cage ear gap based on the first distance A and the second distance B. The first ranging sensor 40 and the second ranging sensor 60 are used to measure the distance of the cage ear 90 and the cage way 70 respectively, and then the measured data is calculated to determine whether the gap value between the cage way 70 and the cage ear 90 is within the safe range, so that the measured result is more accurate, and the problem of inaccurate measurement result caused by directly measuring the gap between the cage ear 90 and the cage way 70 in the traditional way is avoided. At the same time, the ranging sensor can be used for continuous measurement, and the measurement is continuous during the operation of the cage. The problems of low measurement accuracy and low automation degree of the traditional gap measurement technology are solved.

[0020] As Figure 1As shown, in the present scheme, the distance measuring sensor base 10 is preferably a rigid metal piece, having a positioning hole and a guide surface for mounting the distance measuring column, to ensure the repeatability of the positioning accuracy of the distance measuring axis. The connecting surface of the first distance measuring column 30 and the second distance measuring column 50 is provided with a limiting reference, to suppress the slight displacement caused by vibration during the operation of the cage. In specific applications, the cage guide 70 extends in the vertical direction, the first distance measuring column 30 and the second distance measuring column 50 both extend in the vertical direction, the first distance measuring sensor 40 is used for horizontal measurement of the distance from the first distance measuring column 30 to the side of the cage lug 90 close to the first distance measuring column 30, and the measurement direction of the second distance measuring sensor 60 is parallel to and co-directional with the direction of the first distance measuring sensor 40. The second distance measuring sensor 60 is used for measuring the distance from the second distance measuring column 50 to the side of the cage guide 70 close to the second distance measuring column 50. In the present application, the main body of the cage lug 90 is a roller, the axis of the roller extends in the horizontal direction, and the position for distance measurement on the cage lug 90 is the position pointed to by the 3 o'clock or 9 o'clock direction of the roller. The height of the second distance measuring sensor 60 is consistent with the height of the 3 o'clock direction of the roller. The controller mainly includes a PLC or a microcontroller. After receiving the measurement information of the first distance measuring sensor 40 and the second distance measuring sensor 60, the controller determines whether the cage guide 70 and the cage lug 90 are in safe operation by calculating the gap distance between the cage guide 70 and the cage lug 90. In the present application, during the installation and debugging stage, when the gap between the cage lug 90 and the cage guide 70 is 0, the distance from the first distance measuring column 30 to the cage lug 90 and the distance from the second distance measuring column 50 to the cage guide 70 can be set to the same value. In the present embodiment, both distances are set to 200 mm. When the cage is in the running state, the difference between A and B, i.e. the gap value between the cage lug 90 and the cage guide 70, can be used to determine whether the cage is in a safe running state.

[0021] Further, as shown, Figure 1 The transmission module 80 includes a signal interaction type I / O module, the I / O module is arranged in the distance measuring sensor base 10, the input end of the I / O module is connected with the signal output end of the first distance measuring sensor 40 and the second distance measuring sensor 60 respectively, to receive and convert the signal format of the first distance A and the second distance B, and the output end of the I / O module is connected with the signal input end of the controller, to transmit the adapted measurement information to the controller. The I / O module is arranged in the distance measuring sensor base 10, and a damping pad is arranged between the I / O module and the distance measuring sensor base 10, the I / O module is integrated in the distance measuring sensor base 10, which can shorten the signal link, reduce the failure probability of the connector in the strong interference environment underground, and provide a unified external output interface, facilitating subsequent system integration and maintenance.

[0022] Further, the shaft cage-ear gap detection device further comprises an alarm unit connected with the controller, and the controller is further configured to control the alarm unit to send an alarm signal when the measurement information meets a preset condition. The alarm unit mainly comprises an audible and visual alarm actuator, which can be an industrial buzzer or a high-brightness LED lamp. The controller sends an alarm signal through the alarm unit, which can effectively remind the staff that the cage is running with a fault and reduce the risk of accidents. The controller calculates the gap overrun value C according to the formula C=(A-B)-D based on the preset allowed width D between the cage guide 70 and the cage ear 90. The preset condition includes: when the gap overrun value C is less than or equal to 0, the controller stops outputting a control signal to the alarm unit; when the gap overrun value C is greater than 0 and less than or equal to a first preset value, the controller controls the alarm unit to send a risk alarm signal; and when the gap overrun value C is greater than the first preset value, the controller controls the alarm unit to send a dangerous alarm signal. In the embodiment, the first preset value is set to 1 mm. The gap overrun value C triggers different alarm signals according to different situations. When C is greater than 0 and less than or equal to 1 mm, a risk alarm signal is triggered, and the staff can be prompted by the yellow light of the alarm unit that the cage is in a risky running state and should be overhauled after completing the transportation; and when C is greater than 1 mm, the staff can be prompted by the red light of the alarm unit that the cage is in a dangerous running state.

[0023] Further, the shaft cage-ear gap detection device further comprises a display connected with the controller, for displaying the shaft cage-ear gap data information. The display can be arranged in the operation room, and the staff in the operation room can monitor the gap data information of the cage through the display. The display can facilitate the staff to monitor the running state of the cage through a visual method.

[0024] The second embodiment of the present application also provides a shaft cage-ear gap detection method, as shown in Figure 2 The detection method is as follows: Step S101: a first distance measuring column 30 and a second distance measuring column 50 are arranged on the side of the cage guide 70, a first distance measuring sensor 40 is arranged on the first distance measuring column 30, and a second distance measuring sensor 60 is arranged on the second distance measuring column 50; Step S102: the second distance B from the first distance measuring column 30 to the outer side surface of the cage ear 90 is obtained by the first distance measuring sensor 40, and the first distance A from the second distance measuring column 50 to the surface of the cage guide 70 is obtained by the second distance measuring sensor 60; Step S103: the controller obtains the first distance A and the second distance B to calculate the shaft cage-ear gap.

[0025] The detection method is as follows: Step S101: A first distance measuring column 30 and a second distance measuring column 50 are arranged on the side of the cage guide 70, a first distance measuring sensor 40 is arranged on the first distance measuring column 30, and a second distance measuring sensor 60 is arranged on the second distance measuring column 50. The distance measuring directions of the first distance measuring sensor 40 and the second distance measuring sensor 60 are parallel, horizontal and in the same direction, and the first distance measuring sensor 40, the second distance measuring sensor 60, the cage lug 90 and the cage guide 70 are in the same vertical plane. In the installation and debugging stage, when the gap between the cage lug 90 and the cage guide 70 is 0, the distance from the first distance measuring column 30 to the cage lug 90 is the same as the distance from the second distance measuring column 50 to the cage guide 70. In the embodiment, both distances are set to 200 mm.

[0026] Step S102: The second distance B from the first distance measuring column 30 to the outer surface of the cage lug 90 is obtained by the first distance measuring sensor 40, and the first distance A from the second distance measuring column 50 to the surface of the cage guide 70 is obtained by the second distance measuring sensor 60. The second distance B is the distance from the first distance measuring column 30 to the side of the cage lug 90 close to the first distance measuring column 30, and the first distance A is the distance from the second distance measuring column 50 to the side of the cage guide 70 close to the second distance measuring column 50, which is specifically the position of the cage lug 90 in the 9 o'clock or 3 o'clock direction of the cage lug 90.

[0027] Step S103: The gap between the shaft cage lug, i.e. the gap value between the cage lug 90 and the cage guide 70. The controller obtains the first distance A and the second distance B, and judges the gap value between the cage lug 90 and the cage guide 70 through the first distance A and the second distance B. After the cage is in the running state, the difference between A and B is the gap value between the cage guide 70 and the cage lug 90. After the controller calculates the gap value, it is judged whether the gap value meets the preset condition, and an alarm signal is sent by the alarm unit when the gap value meets the preset condition.

[0028] Further, the controller controls the alarm unit to send an alarm signal when the shaft cage ear gap meets a preset condition. The controller calculates a gap overrun value C according to a formula C=(A-B)-D based on the first distance A, the second distance B, and a preset allowable width D between the cage guide 70 and the cage ear 90. The preset condition includes: when the gap overrun value C is less than or equal to 0, the controller stops outputting a control signal to the alarm unit; when the gap overrun value C is greater than 0 and less than or equal to a first preset value, the controller controls the alarm unit to send a risk alarm signal; and when the gap overrun value C is greater than the first preset value, the controller controls the alarm unit to send a danger alarm signal. In the embodiment, the first preset value is set to 1 mm. The gap overrun value C triggers different alarm signals according to different situations. When C is greater than 0 and less than or equal to 1 mm, a risk alarm signal is triggered, and a yellow light of the alarm unit can prompt a worker that the cage is in a risk operation state and should be overhauled after completing the current transportation. When C is greater than 1 mm, a red light of the alarm unit can prompt a worker that the cage is in a dangerous operation state. The scheme quantitatively calculates the gap value and classifies the alarm, converts the fuzzy risk into an accurate early warning signal, and significantly improves the accuracy and effectiveness of safety management.

[0029] Further, the first distance sensor 40 and the second distance sensor 60 are implemented by at least one of the following technologies: laser ranging technology, ultrasonic ranging technology, image recognition technology, or mechanical sensor technology. The laser ranging technology includes pulse method and phase method laser ranging technology. The specific ranging technology can be selected according to the working condition and cost of the cage, and the ranging technology does not limit the detection method of the present application. In the embodiment, the first distance sensor 40 and the second distance sensor 60 are both phase method laser ranging sensors.

[0030] Further, it is characterized in that after the first distance sensor 40 and the second distance sensor 60 are set, a reference calibration step is further included, which specifically includes: when the gap between the cage ear 90 and the cage way 70 is 0, the first reference distance A0 and the second reference distance B0 are obtained, and the initial compensation amount E is calculated according to the calculation formula E = A0-B0, so as to correct the first distance A and the second distance B measured during the operation of the cage, and the formula of the corrected gap overrun value C0 is: C0 = [(A-B)-D]-E. The calibration method provided by the scheme can be used to reduce errors on the one hand, and can also be used for other installation conditions in the initial installation and debugging stage: when the gap between the cage ear 90 and the cage way 70 is 0, the distance from the first distance column 30 to the cage ear 90 is not the same as the distance from the second distance column 50 to the cage way 70, that is, the distance between the first distance column 30 and the second distance column 50 is not equal to the diameter of the cage ear 90. In the installation and debugging stage, when the gap between the cage ear 90 and the cage way 70 is 0, and the distance from the first distance column 30 to the cage ear 90 is the same as the distance from the second distance column 50 to the cage way 70, at this time, the formula C = (A-B)-D is used. When it is necessary to adjust the positions of the first distance column 30 and the second distance column 50, or when it is necessary to calibrate, at this time, an initial compensation value E is introduced, so that when the gap between the cage ear 90 and the cage way 70 is 0, the first distance A0 and the second distance B0 are obtained, and the initial compensation amount E is calculated according to the calculation formula E = A0-B0, so that the calculation formula becomes C0 = [(A-B)-D]-E, so as to obtain the accurate gap overrun value C0.

[0031] Further, the sampling frequency of the first distance sensor 40 on the second distance B and the sampling frequency of the second distance sensor 60 on the first distance A are both 50Hz. The first distance A and the second distance B used for calculation belong to the same time corresponding state, so that the two sensors are triggered to sample at the same time, and if the delay of the two distance links is not the same, a fixed delay compensation can be added in the processing process. The continuous sampling of the first distance A and the second distance B in the scheme enables the gap value between the cage way 70 and the cage ear 90 to be continuously monitored, and the early warning information can be sent in time when the gap value is abnormal.

[0032] Further, the detection method further includes setting multiple sets of detection devices which are independent of each other and have fixed relative positions around the cage way 70 to obtain multiple sets of gap overrun values C. Each set of detection devices independently completes the process of distance measurement, calculation and determination, and the results can be used for local early warning, multi-point trend comparison or redundancy verification, so as to ensure that the cage can continuously and stably operate and accidents can be avoided.

[0033] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A shaft pot ear gap detection device, characterized by, The detection device comprises: a distance measuring sensor base (10) connected with a tank lug base (20); a first distance measuring column (30) arranged on the distance measuring sensor base (10); a first distance measuring sensor (40) arranged on the first distance measuring column (30), the tank lug base (20) is provided with a tank lug (90), the tank lug (90) is provided with a tank channel (70) away from one side of the first distance measuring column (30), the tank channel (70) extends in the vertical direction, and the first distance measuring sensor (40) is used to measure a second distance B from the first distance measuring column (30) to the tank lug (90); a second distance measuring column (50) arranged on the distance measuring sensor base (10); a second distance measuring sensor (60) arranged on the second distance measuring column (50) to measure a first distance A from the second distance measuring column (50) to the tank channel (70); a transmission module (80) arranged in the distance measuring sensor base (10), the transmission module (80) is connected with the first distance measuring sensor (40) and the second distance measuring sensor (60) and receives the first distance A and the second distance B; a controller connected with the transmission module (80); the controller is used to receive and determine a vertical shaft tank lug gap based on the first distance A and the second distance B.

2. The shaft cage gap detection device according to claim 1, characterized in that, The transmission module (80) comprises a signal interaction type I / O module, the I / O module is arranged in the distance measuring sensor base (10), the input end of the I / O module is connected with the signal output end of the first distance measuring sensor (40) and the second distance measuring sensor (60) respectively, so as to receive and convert the signal format of the first distance A and the second distance B, and the output end of the I / O module is connected with the signal input end of the controller, so as to transmit the adapted measurement information to the controller.

3. The shaft cage gap detection device according to claim 1, characterized in that, The vertical shaft tank lug gap detection device further comprises an alarm unit, the alarm unit is connected with the controller, and the controller is further used to control the alarm unit to send an alarm signal when the measurement information meets a preset condition.

4. The shaft cage gap detection device according to claim 1, characterized by The vertical shaft tank lug gap detection device further comprises a display connected with the controller and used to display vertical shaft tank lug gap data information.

5. A shaft pot ear gap detection method, characterized by, The vertical shaft tank lug gap detection method is applied to the vertical shaft tank lug gap detection device of any one of claims 1 to 4, and the vertical shaft tank lug gap detection method comprises: arranging a first distance measuring column (30) and a second distance measuring column (50) on the side of the tank channel (70), arranging a first distance measuring sensor (40) on the first distance measuring column (30), and arranging a second distance measuring sensor (60) on the second distance measuring column (50); The first distance A from the second distance sensor (60) to the surface of the cage way (70) is obtained, and the second distance B from the first distance sensor (40) to the outer surface of the cage ear (90) is obtained. The controller obtains the first distance A and the second distance B to calculate the shaft cage ear gap.

6. The shaft cage gap detection method according to claim 5, wherein, When the shaft cage ear gap meets the preset condition, the controller controls the alarm unit to issue an alarm signal, and the controller calculates a gap overrun value C according to the formula C=(A−B)−D based on the first distance A, the second distance B, and a preset allowable width D between the cage way (70) and the cage ear (90). The preset condition includes: When the gap overrun value C is less than or equal to 0, the controller stops outputting a control signal to the alarm unit; When the gap overrun value C is greater than 0 and less than or equal to a first preset value, the controller controls the alarm unit to issue a risk alarm signal; When the gap overrun value C is greater than the first preset value, the controller controls the alarm unit to issue a danger alarm signal.

7. The shaft cage gap detection method according to claim 5, wherein, The first distance sensor (40) and the second distance sensor (60) are implemented using at least one of the following technologies: laser ranging technology, ultrasonic ranging technology, image recognition technology, or mechanical sensor technology.

8. The shaft cage gap detection method according to claim 6, wherein, After setting the first distance sensor (40) and the second distance sensor (60), a reference calibration step is further included, which specifically includes: When the gap between the cage ear (90) and the cage way (70) is 0, the first reference distance A0 and the second reference distance B0 are obtained, and the initial compensation amount E is calculated according to the formula E=A0−B0 to correct the first distance A and the second distance B measured during the operation of the cage, and the corrected gap overrun value C0 formula is: C0=[(A−B)−D]−E.

9. The shaft cage gap detection method according to claim 5, wherein, The sampling frequency of the second distance B by the first distance sensor (40) and the sampling frequency of the first distance A by the second distance sensor (60) are both 50 Hz.

10. The shaft cage gap detection method according to claim 6, wherein, The detection method further includes circumferentially arranging multiple sets of the detection device on the cage way (70) to obtain multiple sets of the gap overrun value C.

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