Self-cleaning laser ranging device

Abstract

The utility model relates to a self-cleaning laser distance measuring device which comprises a distance measuring instrument body, a laser distance measuring assembly, a cleaning pipe, a gas transmission hose and a lifting device. Mounting holes and mounting grooves are formed in the top end surface of the range finder body; the laser ranging assembly is arranged in the mounting hole; the cleaning pipe is arranged in the mounting groove, and an air outlet is perpendicular to the top end face of the range finder body; the lifting device is fixedly arranged in the range finder body, the cleaning pipe is fixedly connected with the lifting device and moves along the mounting groove by a set distance under the push-pull action of the lifting device, and the set distance is that when the stroke is maximum, an air outlet of the cleaning pipe is higher than the top end face of the range finder body; in the minimum stroke, the air outlet of the cleaning pipe is hidden in the range finder body; one end of the gas hose is connected with the gas inlet of the cleaning pipe, and the other end is connected with gas conveying equipment for providing pressurized gas flow for the cleaning pipe. According to the laser distance measuring device, self-cleaning of the device is effectively achieved through air pressure intensity adjustment and cleaning frequency adjustment.

Description

Technical Field

[0001] The utility model relates to the technical field of laser distance measurement in underground coal mine tunnels, in particular to a self-cleaning laser distance measurement device. Background Art

[0002] With the continuous deepening of coal mining in my country, the deformation of tunnel surrounding rock increases and the deformation rate accelerates, which is becoming increasingly prominent. Timely and effective grasp of the precise deformation of tunnel surrounding rock is of great significance to ensure the safe production of the working face and the normal operation of the entire mine. The traditional methods for monitoring the displacement and deformation of tunnel surrounding rock sections mainly include laser scanning, ultrasonic ranging and laser ranging.

[0003] At present, the laser scanning method uses a laser transmitter to scan the tunnel regularly, and calculates the displacement change of the tunnel surrounding rock by comparing the point cloud data at different times. The point scanning of long-distance tunnels cannot be completed in one go, and there are problems such as loss of accuracy in data splicing. Poor visibility conditions underground will also affect the accuracy of this method.

[0004] Laser ranging is the method of measuring distance by using the relationship between the speed of light and time. Generally speaking, laser ranging consists of two parts: a laser transmitter and a receiver. After emitting the laser, it is reflected by the target. The laser measures the time between the laser's departure and its reflection, and uses the speed of light formula to calculate the distance to be measured, thereby obtaining the result. However, in the process of mine application, due to the influence of the tunnel environment, dust easily accumulates on the surface of the laser rangefinder, which makes it impossible for the laser to be projected to the target area, resulting in errors in the measurement data. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides a self-cleaning laser distance measuring device.

[0006] The technical solution of the utility model is:

[0007] A self-cleaning laser distance measuring device comprises a distance measuring device body, a laser distance measuring assembly, a cleaning pipe, a gas delivery hose and a lifting device;

[0008] The top surface of the rangefinder body is provided with a mounting hole and a mounting groove;

[0009] The laser ranging assembly is arranged in the mounting hole;

[0010] The cleaning pipe is arranged in the installation groove, and the air outlet thereof is perpendicular to the top end surface of the rangefinder body and points to the laser rangefinder assembly;

[0011] The lifting device is fixedly arranged inside the rangefinder body, the cleaning tube is fixedly connected to the lifting device, and moves along the mounting groove for a set distance under the push-pull action of the lifting device, and the set distance is: when the stroke is maximum, the air outlet of the cleaning tube is higher than the top surface of the rangefinder body; when the stroke is minimum, the air outlet of the cleaning tube is hidden inside the rangefinder body;

[0012] One end of the gas delivery hose is connected to the air inlet of the cleaning pipe, and the other end is connected to the gas delivery equipment, so as to provide pressurized air flow to the cleaning pipe.

[0013] Furthermore, the distance measuring device also includes a dustproof baffle; the dustproof baffle is fitted on the outer surface of the distance measuring device body and is higher than the top end surface of the distance measuring device body.

[0014] Furthermore, the distance measuring device also includes an energy storage power supply; the energy storage power supply is arranged in a ring shape and is installed inside the distance measuring instrument body; the energy storage power supply is electrically connected to the lifting device and is used to provide a backup power supply with a stable output to the lifting device.

[0015] Furthermore, the distance measuring device also includes a gas chamber; the gas chamber is annularly arranged inside the distance measuring instrument body, the top end surface of which is connected to the gas supply hose, and the bottom end surface is connected to the air inlet pipe, and the air inlet pipe is connected to the gas conveying equipment; the pressurized gas is stored in the gas chamber for conveying pressurized gas to the cleaning pipe.

[0016] Furthermore, a pressure sensor is arranged in the gas bin, and an electric valve is arranged at the connection with the gas supply hose; the pressure sensor and the electric valve are connected to the coal mine integrated automation system via an optical fiber cable, and the coal mine integrated automation system controls the opening and closing of the electric valve and the gas delivery equipment according to the gas bin pressure data transmitted by the pressure sensor, so as to deliver pressurized air flow to the cleaning pipe and inflate the gas bin.

[0017] Furthermore, the distance measuring device also includes a supporting platform, and the lifting device is fixedly arranged on the supporting platform; the lifting device includes an electric spring and a spring control circuit board; the spring control circuit board is electrically connected to an external power supply and / or a control device through an optical fiber cable, and is used to control the extension and contraction of the electric spring and make horizontal movements of a set distance.

[0018] Furthermore, the distance measuring device also includes a circuit box, which is arranged on the bottom end surface of the distance measuring instrument body and is used to store and organize the optical fiber cables inside the distance measuring device and integrate them into a main cable; the main cable is used to connect to the coal mine comprehensive automation system.

[0019] Furthermore, a rubber pad is provided on the outer surface of the cleaning tube.

[0020] Furthermore, the laser ranging assembly is arranged on the central axis of the rangefinder body; the number of the cleaning tubes is ≧2 and they are evenly distributed in a fan shape on the upper half of the top end surface of the rangefinder body.

[0021] Furthermore, a defog glass layer is provided on the outer surface of the laser ranging assembly.

[0022] The beneficial effects of the utility model are:

[0023] The laser distance measuring device recorded in the utility model performs cleaning operation of the distance measuring instrument assembly through a cleaning tube arranged on the top surface of the distance measuring instrument body. The cleaning tube moves synchronously with the lifting device. When the cleaning tube is higher than the top surface of the distance measuring instrument body, the pressurized airflow transmitted by the gas hose can effectively act on the working surface of the distance measuring instrument assembly, that is, the exposed surface, and remove dust or other dirt by means of the pressurized airflow. The pressure intensity of the pressurized airflow is adjusted through the gas conveying equipment, and it can act on tunnels in different environments; the lifting device can be controlled by the coal mine comprehensive automation system, and the frequency of the cleaning tube cleaning the distance measuring instrument assembly can be conveniently adjusted to realize the self-cleaning of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : Schematic diagram of the structure of the self-cleaning laser distance measuring device in the exemplary embodiment of the utility model Figure 1 ;

[0025] Figure 2 : Schematic diagram of the structure of the self-cleaning laser distance measuring device in the exemplary embodiment of the utility model Figure 2 ;

[0026] Figure 3 : Schematic diagram of the structure of the self-cleaning laser distance measuring device in the exemplary embodiment of the utility model Figure 3 ;

[0027] Figure 4 : A schematic diagram of the partial structure of a self-cleaning laser distance measuring device in an exemplary embodiment of the utility model;

[0028] Figure 5 : A schematic diagram of the top structure of the self-cleaning laser distance measuring device in an exemplary embodiment of the utility model;

[0029] Figure 6 : Schematic diagram of the overall external structure of the self-cleaning laser distance measuring device in an exemplary embodiment of the utility model;

[0030] Figure 7 : Schematic diagram of the opening / closing structure of the cleaning tube of the self-cleaning laser ranging device in the exemplary embodiment of the utility model.

[0031] Explanation of symbols

[0032] 1- rangefinder body, 2- laser rangefinder assembly, 3- cleaning pipe, 4- gas hose, 5- support platform, 6- electrical spring, 7- spring control circuit board, 8- dust baffle, 9- circuit box, 10- optical fiber cable, 11- main cable, 12- energy storage power supply, 13- gas chamber, 14- air intake pipe. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1 To Attachment Figure 7 , the utility model is described in detail by way of embodiments. Example

[0034] This embodiment describes a self-cleaning laser distance measuring device, which includes a distance measuring device body 1, a laser distance measuring assembly 2, a cleaning pipe 3, a gas supply hose 4, a lifting device and a supporting platform 5.

[0035] The rangefinder body 1 is configured as a cylinder, and a mounting hole and a mounting groove are provided on the top surface thereof.

[0036] The mounting hole is preferably arranged on the central axis of the rangefinder body 1 for mounting the laser ranging assembly 2, and the mounting method may preferably be threaded mounting or embedded mounting.

[0037] Since the rangefinder body 1 is generally in a horizontal state when in use, the mounting groove is preferably arranged in the upper half of the top surface of the rangefinder body 1. The mounting groove is used to install the cleaning tube 3, and the cleaning tube 3 can reciprocate along the mounting groove for a set distance under the action of external force. The number of mounting grooves should be the same as the number of cleaning tubes 3. When there are multiple mounting grooves, they are preferably evenly distributed in a fan shape in the upper half of the top surface of the rangefinder body 1.

[0038] The laser distance measuring assembly 2 is electrically connected to an external power source and / or control device via an optical fiber cable 10, and is used to emit laser to measure the distance to a target area in the lane.

[0039] A defogging glass layer is provided on the surface of the laser hole of the laser ranging assembly 2 to prevent fogging on the surface of the laser hole caused by temperature differences in the tunnel, thereby making the measurement data more accurate.

[0040] The bottom of the cleaning tube 3 is fixedly connected to the electrical spring 6 of the lifting device, and its air outlet cross section is perpendicular to the top surface of the rangefinder body 1. It is preferably arranged so that the air outlet faces the central axis of the rangefinder body 1, that is, toward the laser ranging assembly 2.

[0041] The lifting device is fixedly arranged on the support platform 5, and the support platform 5 is fixedly arranged inside the rangefinder body 1. The lifting device includes an electric spring 6 and a spring control circuit board 7. The spring control circuit board 7 is electrically connected to an external power source and / or a control device through an optical fiber cable 10, and is used to control the expansion and contraction of the electric spring 6 and to make horizontal reciprocating motion of a set distance. The specific stroke range of the set distance is: the maximum stroke makes the air outlet of the cleaning tube 3 higher than the top surface of the rangefinder body 1; the minimum stroke makes the air outlet of the cleaning tube 3 hidden inside the rangefinder body 1.

[0042] One end of the air delivery hose 4 is fixedly connected to the air inlet of the cleaning tube 3, and the other end is connected to a gas delivery device, such as an air compressor, to provide pressurized airflow. When the electric spring 6 runs to the maximum stroke, the air outlet of the cleaning tube 3 is higher than the top surface of the rangefinder body 1, and the pressurized airflow is ejected from the air outlet of the pneumatic cleaning tube 3 to remove dust from the exposed surface of the laser rangefinder assembly 2.

[0043] In this embodiment:

[0044] 1. The device is also provided with a dust shield 8. The cross section of the dust shield 8 is semicircular and is fitted on the outer surface of the rangefinder body 1. The dust shield 8 is 10-15 cm higher than the top surface of the rangefinder body 1 and is used to block the dust that sinks freely in the lane to prevent it from sticking to the exposed surface of the laser ranging assembly 2.

[0045] 2. The cleaning pipes 3 are preferably arranged in the semicircular shielding area of ​​the dust baffle 8, and preferably three of them are arranged.

[0046] 3. A rubber pad is arranged on the outer surface of the cleaning tube 3 to protect the cleaning tube 3 and prevent the cleaning tube 3 from being damaged due to an overly fast recovery speed, thereby affecting its normal use.

[0047] 4. The gas delivery hose 4 is preferably made of a silicone hose, which is easy to bend and can ensure smooth ventilation.

[0048] 5. The device is also provided with a circuit box 9, which is arranged at the bottom end surface of the rangefinder body 1 and is used to store and organize the laser ranging assembly 2 and the optical fiber cable 10 of the spring control circuit board 7, and is integrated into a main cable 11 in the circuit box 9. The main cable 11 controls the laser ranging, cleaning and other tasks completed by the laser ranging assembly 2 by connecting to the coal mine comprehensive automation system, and controls the collection of laser ranging data and the expansion and contraction operation of the electric spring 6.

[0049] The following is a brief description of the operating status of this device:

[0050] The device has three working states, namely, measurement state, cleaning operation state and cleaning shutdown state.

[0051] Measuring status: The laser distance measuring assembly 2 measures data once every minute, and the measured data is transmitted to the coal mine integrated automation system in real time for statistics. When there is a large error in the measured data, the self-cleaning laser distance measuring device starts working.

[0052] Cleaning operation status: the lifting device works, the electric spring 6 lifts the cleaning tube 3 to the set position, and then the gas delivery equipment is turned on. The pressurized gas enters the cleaning tube 3 along the gas delivery hose 4 and is ejected from the gas outlet of the cleaning tube 3 to clean the exposed surface of the laser ranging assembly 2.

[0053] Cleaning closed state: After the cleaning work is completed, the electrical spring 6 retracts the cleaning tube 3 into the rangefinder body 1 and closes the gas delivery device at the same time. Example

[0054] On the basis of Example 1, a self-cleaning laser ranging device described in this example further includes an energy storage power supply 12 .

[0055] The energy storage power supply 12 is configured in a ring shape and is installed inside the rangefinder body 1 , specifically, at the bottom of the supporting platform 5 .

[0056] The energy storage power supply 12 is electrically connected to the lifting device and is used to provide a backup power supply with a stable output to the lifting device when the external power supply is cut off.

[0057] The energy storage power source 12 is electrically connected to an external power source and / or control device via an optical fiber cable 10 for self-charging and data transmission monitoring, such as monitoring its remaining power. The optical fiber cable 10 is integrated into the main cable 11 in the circuit box 9. Example

[0058] On the basis of Example 1 or Example 2, a self-cleaning laser ranging device described in this example further includes a gas chamber 13 .

[0059] The gas chamber 13 is arranged inside the rangefinder body 1 and is specifically arranged in a ring shape. The top end surface of the gas chamber 13 is connected to the gas delivery hose 4, and the bottom end surface is connected to the air inlet pipe 14, and the air inlet pipe 14 is connected to the gas delivery device.

[0060] A pressure sensor is arranged in the gas chamber 13, and an electric valve is arranged at the connection with the gas delivery hose 4. The pressure sensor and the electric valve are connected to the coal mine integrated automation system through the optical fiber cable 10.

[0061] The coal mine integrated automation system collects the real-time air pressure data of the gas bin 13 transmitted by the pressure sensor, and controls the opening and closing of the electric valve and the opening and closing of the gas delivery equipment through threshold comparison, so as to deliver pressurized air flow to the cleaning pipe 3 and inflate the gas bin 13.

[0062] The following is a brief description of the coal mine integrated automation system:

[0063] The coal mine comprehensive automation system is a system developed in my country that integrates mine monitoring, alarm, and production operations. The system consists of three layers: application layer, network layer, and field equipment layer. The application layer uses a unified data platform and login interface, and users can visit each subsystem. The network layer backbone network uses a Gigabit redundant industrial Ethernet ring network to ensure high bandwidth and reliability of network communication, and can access various systems such as industrial control, video, audio, and communication. The field uses a 100M industrial Ethernet ring network and a variety of mine-use intrinsically safe field industrial buses to ensure that users can access various monitoring systems and equipment; the field equipment layer is composed of various bus communication substations, wireless communication substations, monitoring devices, intelligent instruments, and sensors.

[0064] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A self-cleaning laser ranging device, characterized in that: It includes a rangefinder body, a laser rangefinder assembly, a cleaning pipe, a gas hose and a lifting device; The top surface of the rangefinder body is provided with a mounting hole and a mounting groove; The laser ranging assembly is arranged in the mounting hole; The cleaning pipe is arranged in the installation groove, and the air outlet thereof is perpendicular to the top end surface of the rangefinder body and points to the laser rangefinder assembly; The lifting device is fixedly arranged inside the rangefinder body, the cleaning tube is fixedly connected to the lifting device, and moves along the mounting groove for a set distance under the push-pull action of the lifting device, and the set distance is: when the stroke is maximum, the air outlet of the cleaning tube is higher than the top surface of the rangefinder body; when the stroke is minimum, the air outlet of the cleaning tube is hidden inside the rangefinder body; One end of the gas delivery hose is connected to the air inlet of the cleaning pipe, and the other end is connected to the gas delivery equipment, so as to provide pressurized air flow to the cleaning pipe.

2. A self-cleaning laser ranging device according to claim 1, characterized in that: The distance measuring device also includes a dustproof baffle; the dustproof baffle is fitted on the outer surface of the distance measuring device body and is higher than the top end surface of the distance measuring device body.

3. A self-cleaning laser ranging device according to claim 1, characterized in that: The distance measuring device also includes an energy storage power supply; the energy storage power supply is arranged in a ring shape and is installed inside the distance measuring instrument body; the energy storage power supply is electrically connected to the lifting device and is used to provide a backup power supply with a stable output to the lifting device.

4. A self-cleaning laser ranging device according to claim 1, characterized in that: The distance measuring device also includes a gas chamber; the gas chamber is annularly arranged inside the distance measuring instrument body, the top end surface of the gas chamber is connected to the gas supply hose, the bottom end surface is connected to the air intake pipe, and the air intake pipe is connected to the gas delivery equipment; the pressurized gas is stored in the gas chamber and is used to deliver pressurized gas to the cleaning pipe.

5. A self-cleaning laser distance measuring device according to claim 4, characterized in that: A pressure sensor is arranged in the gas bin, and an electric valve is arranged at the connection with the gas supply hose; the pressure sensor and the electric valve are connected to the coal mine integrated automation system via an optical fiber cable, and the coal mine integrated automation system controls the opening and closing of the electric valve and the gas delivery equipment according to the gas bin pressure data transmitted by the pressure sensor, so as to deliver pressurized air flow to the cleaning pipe and inflate the gas bin.

6. A self-cleaning laser ranging device according to any one of claims 1 to 5, characterized in that: The distance measuring device also includes a supporting platform, and the lifting device is fixedly arranged on the supporting platform; the lifting device includes an electric spring and a spring control circuit board; the spring control circuit board is electrically connected to an external power supply and / or a control device through an optical fiber cable, and is used to control the extension and contraction of the electric spring and make horizontal movements of a set distance.

7. A self-cleaning laser distance measuring device according to claim 6, characterized in that: The distance measuring device also includes a circuit box, which is arranged on the bottom end surface of the distance measuring instrument body and is used to store and organize the optical fiber cables inside the distance measuring device and integrate them into a main cable; the main cable is used to connect to the coal mine comprehensive automation system.

8. A self-cleaning laser ranging device according to any one of claims 1 to 5, characterized in that: The outer surface of the cleaning tube is provided with a rubber pad.

9. A self-cleaning laser ranging device according to any one of claims 1 to 5, characterized in that: The laser distance measuring assembly is arranged on the central axis of the rangefinder body; the number of the cleaning tubes is ≧2 and they are evenly distributed in a fan shape on the upper half of the top end surface of the rangefinder body.

10. A self-cleaning laser ranging device according to any one of claims 1 to 5, characterized in that: The outer surface of the laser ranging assembly is provided with a demisting glass layer.

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