Device and method for measuring deflection amount of lifting working platform

Abstract

The invention relates to the technical field of lifting working platform deflection amount measurement, in particular to a lifting working platform deflection amount measuring device and a measuring method thereof.The lifting working platform deflection amount measuring device comprises a linear laser, a terminal, a base, a lifting mast, a working platform, a reflecting lens and a laser receiver; a lifting mast is fixed to the top of the base, and a working platform is fixed to the top of the lifting mast. A reflecting lens is fixed on one side of the lower surface of the working platform, the linear laser and the laser receiver are arranged at the top of the base and located on the same side as the reflecting lens, the linear laser emits laser to the reflecting lens, and the reflecting lens reflects the laser to the laser receiver to achieve deflection measurement; the reflecting lens is provided with a first reflecting surface and a second reflecting surface, and the first reflecting surface and the second reflecting surface are perpendicular to each other; the terminal is connected with the laser receiver for signal interaction, and the deflection amount measuring device and the deflection amount measuring method of the lifting working platform can realize accurate, safe and convenient deflection amount measurement.

Description

Technical Field

[0001] The invention belongs to the technical field of deflection measurement of a lifting work platform, and in particular relates to a deflection measurement device and a measurement method for a lifting work platform. Background Art

[0002] As an important equipment for aerial work, the safety and reliability of the lifting work platform are directly related to the personal safety of the operator, and equipment overturning is one of the main risks, so the equipment stability test is very important. The natural deflection of the lifting work platform is the horizontal change of the work platform during the entire lifting process, which is a reflection of the stability of the work platform. The relevant standards stipulate the deflection of the work platform of this type of equipment, but the deflection measurement is difficult and difficult to measure accurately, safely and conveniently.

[0003] At present, there are mainly the following methods for measuring the deflection: (1) The brush measurement method is to fix a pencil on the working platform and a piece of paper in the direction of the working platform, and use the pencil to draw lines to record the changes in the working platform. This method is very cumbersome and difficult to operate; (2) The projection measurement method is to fix one end of the rope at the midpoint of the side of the working platform and connect the other end to a heavy hammer. When the working platform rises to the highest position, the projection of the heavy hammer on the ground is recorded. The maximum distance change of the projection is the maximum horizontal deflection of the working platform. This method is not accurate enough, not intelligent enough, and inefficient; (3) The laser distance measurement method is to install a triangle block and a laser distance meter on the working platform and the chassis respectively, and use the laser distance meter to measure the vertical distance change of the triangle block and convert it into horizontal change. This method does not take into account the vertical displacement change of the working platform itself during the lifting process. The measurement method has a large error. At the same time, the measurement accuracy is not enough when the horizontal change of the working platform is not large. Summary of the invention

[0004] In order to solve the problems that the existing measurement results of the runout of a lifting work platform are not accurate enough and the measurement method is difficult to operate, the present invention provides a runout measurement device and a measurement method for a lifting work platform, which can achieve accurate, safe and convenient runout measurement.

[0005] The technical solution of the present invention is as follows:

[0006] A device for measuring the deflection amount of a lifting work platform, comprising a straight-line laser, a terminal, a base, a lifting mast, a work platform, a reflective lens and a laser receiver;

[0007] A lifting mast is fixed on the top of the base, and a working platform is fixed on the top of the lifting mast;

[0008] A reflective lens is fixed on one side of the lower surface of the working platform, the straight line laser and the laser receiver are arranged on the top of the base and on the same side as the reflective lens, the straight line laser emits laser to the reflective lens, and the reflective lens reflects the laser to the laser receiver to realize the measurement of the deflection amount;

[0009] The reflective lens has a first reflective surface and a second reflective surface, and the first reflective surface and the second reflective surface are perpendicular to each other;

[0010] The terminal is connected to the laser receiver for signal interaction.

[0011] Preferably, the length of the first reflecting surface is the same as the length of the second reflecting surface.

[0012] Preferably, the laser receiver includes a linear array CCD module and a wireless data transmission module. The linear array CCD module is connected to the terminal via the wireless data transmission module. The linear array CCD module is used to realize laser reception and measurement, and the measurement result is transmitted to the terminal via the wireless data transmission module.

[0013] Preferably, the wireless data transmission module is an nRF24L01+ wireless data transmission module.

[0014] Preferably, a groove for placing the laser receiver is provided on the top of the base.

[0015] Preferably, a mounting groove for placing the line laser is provided on the top of the base.

[0016] A method for measuring the deflection amount of a lifting work platform, the method comprising the following steps:

[0017] Step 1: Start the straight line laser to emit light to illuminate the reflective lens at the bottom of the work platform, and the laser receiver receives the light;

[0018] Step 2: Start the lifting mast to change the height of the working platform and monitor it in real time through the terminal;

[0019] Step 3: The laser receiver receives the data, calculates the actual value of the movement change of the working platform according to the magnification k, and sends the data to the terminal;

[0020] Step 4: The terminal receives the data and displays the actual value of the movement change of the working platform on the screen in the form of a curve, and reads the real-time deflection and maximum deflection through the screen.

[0021] Preferably, the magnification k=2 can be obtained by calculating the ratio of the horizontal movement change of the working platform to the horizontal movement of the laser line.

[0022] Preferably, the actual value of the movement change of the working platform is calculated by the magnification k, specifically:

[0023] The actual value of the working platform's movement change = the size sensing value of the laser receiving ruler ÷ k.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention provides a device for measuring the deflection of a lifting work platform and a method for measuring the deflection. The deflection measurement is achieved by using a laser reflection amplification measurement method. A straight laser line is used to illuminate the reflective lens on the work platform. The change of the work platform changes the reflection position of the laser line. The reflective lens is composed of two mutually perpendicular lenses. The position change of the light after being reflected by the two oblique reflective lenses is amplified, making the measurement more accurate. At the same time, a laser receiver is used to receive the change of light, which is converted into a measurement value, and then the measurement result is displayed on a handheld terminal by wireless transmission, making the measurement safer and more convenient to view.

[0026] (2) The present invention solves the problem of conveniently measuring the runout of a lifting work platform over its entire stroke.

[0027] (3) The measurement results of the present invention are more accurate, especially when the change in the deflection is not large.

[0028] (4) The present invention provides a terminal that can be used to check the change in the deflection at a location far away from the work platform, making the measurement safer.

[0029] (5) The present invention can measure the position with the maximum deflection in the whole stroke, providing a reference for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 is a schematic diagram of the structure of a reflective lens;

[0032] In the figure: 1-line laser, 2-base, 3-lifting mast, 4-working platform, 5-reflecting lens, 6-laser receiver, 7-first reflecting surface, 8-second reflecting surface. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] See also Figure 1 , a device for measuring the deflection of a lifting work platform, comprising a straight line laser 1, a terminal, a base 2, a lifting mast 3, a work platform 4, a reflective lens 5 and a laser receiver 6;

[0035] A lifting mast 3 is fixed on the top of the base 2, and a working platform 4 is fixed on the top of the lifting mast 3;

[0036] A reflective lens 5 is fixed to one side of the lower surface of the working platform 4, and the line laser 1 and the laser receiver 6 are arranged on the top of the base 2 and on the same side as the reflective lens 5. The line laser 1 emits laser to the reflective lens 5, and the reflective lens 5 reflects the laser to the laser receiver 6 to achieve the measurement of the deflection amount;

[0037] The reflective lens 5 has a first reflective surface 7 and a second reflective surface 8, and the first reflective surface 7 and the second reflective surface 8 are perpendicular to each other;

[0038] The terminal is connected to the laser receiver 6 for signal interaction.

[0039] The terminal includes a serial port touch screen, an MCU chip, and a wireless transceiver module. The serial port touch screen only plays the role of display and functional interaction, and the MCU chip plays the role of control. The wireless data transmission module is connected to the wireless transceiver module so that the serial port touch screen and the laser receiver can communicate. This technology is a conventional technical means and the working principle will not be explained here.

[0040] See also Figure 2 In one embodiment of the present invention, the length of the first reflecting surface is different from the length of the second reflecting surface.

[0041] In one embodiment of the present invention, the laser receiver 6 includes a linear array CCD module and a wireless data transmission module. The linear array CCD module is connected to the terminal via the wireless data transmission module. The linear array CCD module is used to realize laser reception and measurement. The measurement result is transmitted to the terminal via the wireless data transmission module. The linear array CCD module is used to realize laser reception.

[0042] On the basis of the previous embodiment, the wireless data transmission module is an nRF24L01+ wireless data transmission module.

[0043] In order to better install the laser receiver 6, in one embodiment of the present invention, a groove for placing the laser receiver 6 is opened on the top of the base 2.

[0044] In one embodiment of the present invention, a mounting groove for placing the line laser 1 is provided on the top of the base 2 , so as to facilitate the installation of the line laser 1 .

[0045] A method for measuring the deflection amount of a lifting work platform, the method is implemented by the above-mentioned measuring device, and the method comprises the following steps:

[0046] Step 1: Start the line laser 1 to emit light to illuminate the reflective lens 5 at the bottom of the working platform 4, and the laser receiver 6 receives the light;

[0047] Step 2: Start the lifting mast 3 to change the height of the working platform 4, and monitor it in real time through the terminal;

[0048] Step 3: The laser receiver 6 receives the data, calculates the actual value of the movement change of the working platform according to the magnification k, and sends the data to the terminal;

[0049] Step 4: The terminal receives the data and displays the actual value of the movement change of the working platform (the change in the full stroke) on the screen in the form of a curve, and reads the real-time runout and maximum runout through the screen.

[0050] The real-time deflection amount is the actual value of the current movement change of the working platform.

[0051] See also Figure 2 , in one embodiment of the present invention, the ratio of the horizontal movement change of the working platform to the horizontal movement of the laser line is: k = 2a / a = 2;

[0052] The magnification k=2 can be obtained.

[0053] The instrument has precision. The greater the magnification, the higher the precision. For example, if the instrument error is 2%, the error will be reduced to 1% after being magnified 2 times.

[0054] See also Figure 2 , the angle between the first reflection surface and the horizontal direction is α=45°, the second reflection surface is perpendicular to the first reflection surface, when the laser line is vertically directed to point A on the first reflection surface, it is reflected horizontally to point B on the second reflection surface, and then vertically reflected to the receiver below. When the entire frame moves a distance a along the horizontal direction with the working platform, the horizontal reflection line changes from AB to A`B`. Since the first reflection surface and the second reflection surface are two isosceles sides of an isosceles right triangle, the horizontal change from reflection point B to B` relative to the frame is also a, so the horizontal reflection line A`B` is 2a more than the original reflection line AB, then the ratio of the horizontal movement change of the laser line to the horizontal movement change of the working platform is k=2a / a=2, that is, the magnification of the horizontal movement change of the working platform reflected to the horizontal movement of the laser line is 2, and this method can reduce the system measurement error.

[0055] In one embodiment of the present invention, the actual value of the movement change of the working platform calculated by the magnification k is specifically:

[0056] The actual value of the working platform's movement change = the size sensing value of the laser receiving ruler ÷ K.

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for measuring the deflection of a lifting work platform, characterized in that: It includes a straight line laser, a terminal, a base, a lifting mast, a working platform, a reflective lens and a laser receiver; A lifting mast is fixed on the top of the base, and a working platform is fixed on the top of the lifting mast; A reflective lens is fixed on one side of the lower surface of the working platform, the straight line laser and the laser receiver are arranged on the top of the base and on the same side as the reflective lens, the straight line laser emits laser to the reflective lens, and the reflective lens reflects the laser to the laser receiver to realize the measurement of the deflection amount; The reflective lens has a first reflective surface and a second reflective surface, and the first reflective surface and the second reflective surface are perpendicular to each other; The terminal is connected to the laser receiver for signal interaction.

2. The device for measuring the deflection of a lifting work platform according to claim 1, characterized in that: The length of the first reflecting surface is the same as the length of the second reflecting surface.

3. The device for measuring the deflection of a lifting work platform according to claim 1, characterized in that: The laser receiver includes a linear array CCD module and a wireless data transmission module. The linear array CCD module is connected to the terminal via the wireless data transmission module. The linear array CCD module is used to realize laser reception and measurement. The measurement result is transmitted to the terminal via the wireless data transmission module.

4. The device for measuring the deflection of a lifting work platform according to claim 3, characterized in that: The wireless data transmission module is an nRF24L01+ wireless data transmission module.

5. The device for measuring the deflection of a lifting work platform according to claim 1, characterized in that: The top of the base is provided with a groove for placing the laser receiver.

6. The device for measuring the deflection of a lifting work platform according to claim 1, characterized in that: The top of the base is provided with a mounting groove for placing the one-line laser.

7. A method for measuring the deflection of a lifting work platform, the method being implemented by the measuring device according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: Step 1: Start the straight line laser to emit light to illuminate the reflective lens at the bottom of the work platform, and the laser receiver receives the light; Step 2: Start the lifting mast to change the height of the working platform and monitor it in real time through the terminal; Step 3: The laser receiver receives the data, calculates the actual value of the movement change of the working platform according to the magnification k, and sends the data to the terminal; Step 4: The terminal receives the data and displays the actual value of the movement change of the working platform on the screen in the form of a curve, and reads the real-time deflection and maximum deflection through the screen.

8. A method for measuring the deflection of a lifting work platform according to claim 7, characterized in that: The magnification k=2.

9. A method for measuring the deflection of a lifting work platform according to claim 7, characterized in that: The actual value of the movement change of the working platform is calculated by the magnification k, specifically: The actual value of the working platform's movement change = the size sensing value of the laser receiving ruler ÷ k.

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