Automatically lifting microphone stand and method for controlling automatic lifting of microphone stand

Abstract

The present invention provides an automatically lifting microphone stand and a method for controlling the automatic lifting of the microphone stand. The microphone stand mainly includes an electric push rod and a lifting rod for clamping a microphone. At least two laser radars arranged up and down are installed on the lifting rod, which are a first laser radar and a second laser radar from top to bottom. The laser beam of the first laser radar forms an elevation angle with the horizontal plane, and the laser beam of the second laser radar coincides with the horizontal plane. The first laser radar and the second laser radar are both electrically connected to a single-chip microcomputer. The single-chip microcomputer controls the electric push rod to drive the lifting rod to rise or fall through a relay, and the single-chip microcomputer is connected to a power supply. According to the shielding conditions of the two laser radars, the single-chip microcomputer controls the electric push rod to rise or fall, and automatically adjusts the height of the microphone stand according to different human body heights. The entire lifting process is automatically completed without the need for manual operation by the management personnel, and the management personnel do not need to go on stage to operate. While ensuring the order of the meeting, it saves manpower and is easy to use.

Description

Technical Field

[0001] The invention belongs to the field of conference equipment, and in particular relates to an automatically lifting microphone stand and a method for controlling the automatic lifting of the microphone stand. Background Art

[0002] As a sound pickup device, the microphone plays an indispensable role in the conference system.

[0003] Usually, the microphone stand used for conference speeches is a floor-standing stand. During use, it generally adopts a manual adjustment of the mechanical structure to match the user's height. When the meeting is in progress, managers need to take turns to go on stage to adjust to ensure normal use by speakers with large height differences.

[0004] The Chinese patent with publication number CN202475712U discloses a remote-controlled electric lifting microphone stand, which includes a base, an outer tube, a telescopic rod and a microphone mounting frame. The microphone mounting frame is arranged at the upper end of the telescopic rod. It also includes an infrared receiver, a control circuit and a steering gear. When the height of the microphone needs to be adjusted, a person at a distance presses the remote control. After the infrared receiver receives the signal, it sends it to the control circuit to make the steering gear work. The driving rod of the steering gear makes the telescopic rod move up and down to achieve the purpose of adjusting the height of the microphone. This solves the problem that the manager needs to go on stage to operate during the conventional microphone stand height adjustment process, which affects the order of the meeting.

[0005] However, the above application documents still require the arrangement of management personnel to perform the work, and cannot fully realize automatic control. In addition, the infrared signal transmission distance is short and cannot be used in an obstructed state. It is necessary to set up a suitable manual operation place, and there are still problems of inconvenience in use. Summary of the invention

[0006] The embodiments of the present invention provide an automatically lifting microphone stand and a method for controlling the automatic lifting of the microphone stand, the first purpose of which is to solve the problem that the lifting of the existing microphone stand requires manual operation, which wastes manpower and the microphone stand cannot be automatically lifted; the second purpose is to solve the problem that the microphone stand cannot be used in a blocked state when operated by the infrared principle.

[0007] In order to solve the above technical problems, the present invention provides an automatically lifting microphone stand, comprising a chassis, an electric push rod and a lifting rod for clamping a microphone, which are connected in sequence from bottom to top. At least two ranging modules are axially installed on the rod wall of the lifting rod. The ranging module detects the distance between the user in front of the microphone stand and the ranging module and sends it to a single-chip microcomputer. The single-chip microcomputer controls the electric push rod through a relay to drive the lifting rod to rise or fall. The single-chip microcomputer is connected to a power supply.

[0008] Furthermore, the ranging module is a laser radar, and two laser radars are arranged on the upper and lower walls of the lifting rod, namely the first laser radar and the second laser radar from top to bottom. The laser beam emitted by the first laser radar forms an elevation angle α with the horizontal plane, and the second laser radar emits the laser beam horizontally.

[0009] Preferably, the first laser radar is detachably mounted on the rod wall of the lifting rod through a first connecting device, and the first laser radar can rotate around the first connecting device; the second laser radar is detachably mounted on the rod wall of the lifting rod through a second connecting device, and the second laser radar can rotate around the second connecting device.

[0010] Further, the first connecting device is composed of two parts, namely a first rotating member and a second fixed member;

[0011] The first rotating member at least comprises a U-shaped plate and an L-shaped plate, and the back surface of the L-shaped plate is fixedly connected to the middle plate of the U-shaped plate;

[0012] The second fixing member comprises at least two mounting plates arranged in parallel up and down, a steering gear is installed between the two mounting plates, an upper plate surface of the mounting plate above the steering gear and a lower plate surface of the mounting plate below the steering gear are respectively vertically fixed with a limiting plate, the two limiting plates are in the same plane, and a rod hole for the lifting rod to pass through is opened on the plate surface of the mounting plate on the same side of each limiting plate;

[0013] The first laser radar is installed at the angle of the L-shaped plate. The two side arms of the U-shaped plate are clamped and installed on the steering gear. The steering gear is electrically connected to the single-chip microcomputer. The single-chip microcomputer controls the rotation angle of the first laser radar through the steering gear to change the emission angle of the laser beam.

[0014] Preferably, the second connecting device consists of two parts, namely a second rotating member and a second fixed member;

[0015] The second rotating member comprises a flat plate, the flat plate having two parallel and opposite plate surfaces, one of which is used to mount the second laser radar, and the center of the other plate surface vertically extends outward to form two parallel and opposite first ear plates, each of which has a through hole on its surface;

[0016] The second fixing member includes an annular hoop with a tightening end for encircling the lifting rod, the tightening end of the annular hoop is two second ear plates connected by a pin shaft, and the outer wall of the annular hoop opposite to the second ear plate is provided with a third ear plate that can be inserted between the two first ear plates, and a through hole is provided on the plate surface of the third ear plate, and the third ear plate is clamped between the two first ear plates and connected by a pin shaft inserted into the through hole.

[0017] Furthermore, the structure between the two first ear plates is divided into a solid body and a hollow cavity, the portion close to the flat plate is solid, and the shape of the hollow cavity for inserting the third ear plate is the same as that of the third ear plate.

[0018] Preferably, the electric push rod comprises at least a fixed outer tube and a telescopic inner rod, one end of the telescopic inner rod is inserted into the fixed outer tube, the other end of the telescopic inner rod is connected to the bottom end of the lifting rod, and the axial center line of the lifting rod coincides with the axial center line of the telescopic inner rod.

[0019] Furthermore, the present invention also protects a method for controlling the automatic lifting of a microphone stand, comprising the following steps:

[0020] Obtain the distance L´ between the first laser radar and the user, compare the distance L´ with the preset value L, if L´≤preset value L, it is considered that the first laser radar is blocked, if L´>preset value L, it is considered that the first laser radar is not blocked;

[0021] Obtain the distance L" between the second laser radar and the user, compare the distance L" with the preset value L, if the distance L"≤the preset value L, it is considered that the second laser radar is blocked, if the distance L">the preset value L, it is considered that the second laser radar is not blocked;

[0022] According to different combinations of whether the first laser radar and the second laser radar are blocked or not, the single chip microcomputer controls the electric push rod to drive the lifting rod to rise or fall until it matches the height of the user.

[0023] Furthermore, according to different combinations of whether the first laser radar and the second laser radar are blocked or not blocked, the single chip microcomputer controls the electric push rod to drive the lifting rod to rise or fall until it matches the height of the user, which specifically includes the following steps:

[0024] S001. In the initial state, the electric push rod is retracted, the microphone stand is at the lowest point, the first laser radar emits a laser beam obliquely upward, and an initial angle α0 is formed between the laser beam and the horizontal plane, and the second laser radar emits a laser beam horizontally;

[0025] S002. The single chip microcomputer controls the microphone stand to undergo the following changes according to the user's height:

[0026] S201. The first user comes to the stage in front of the microphone stand, and the single-chip microcomputer obtains the distance L1" between the second laser radar and the first user. If the distance L1" ≤ the preset value L, the single-chip microcomputer controls the servo to rotate until the laser beam emitted by the first laser radar forms a preset elevation angle α1 corresponding to the distance L1", and then the single-chip microcomputer controls the microphone stand to rise until the second laser radar is blocked and the first laser radar is not blocked, and the microphone stand stops rising;

[0027] S202. The first user leaves the microphone stand, and the height of the microphone stand remains unchanged. The single-chip microcomputer controls the servo to rotate until the laser beam emitted by the first laser radar and the horizontal plane return to the initial angle α0. The single-chip microcomputer starts timing from the time when the user leaves the microphone stand and the two laser radars are not blocked at the same time, and records the time T when both laser radars are not blocked, and compares it with T´ pre-stored in the single-chip microcomputer. If T≤T´, the height of the microphone stand remains unchanged. If T>T´, the single-chip microcomputer controls the microphone stand to descend. During the descent, the second user comes on stage and comes to the front of the microphone stand;

[0028] S203. The second user comes on stage and stands in front of the microphone stand. The single-chip microcomputer obtains L2" between the second laser radar and the second user. If L2"≤preset value L, the single-chip microcomputer controls the servo to rotate until the laser beam emitted by the first laser radar forms a preset elevation angle α2 corresponding to L2". At the same time:

[0029] If the first laser radar is not blocked and the second laser radar is blocked, the single chip microcomputer controls the microphone stand to descend until both the first laser radar and the second laser radar are blocked at the same time, the microphone stand stops descending and then immediately rises, until the second laser radar is blocked and the first laser radar is not blocked, the microphone stand stops rising;

[0030] If the first laser radar and the second laser radar are blocked at the same time, the single chip microcomputer controls the microphone bracket to rise until the second laser radar is blocked and the first laser radar is not blocked, and the microphone bracket stops rising;

[0031] S204. The second user leaves the microphone stand, and the next user comes on stage to the front of the microphone stand, and repeats step S203 until the first laser radar and the second laser radar are both unobstructed. The single-chip microcomputer controls the microphone stand to descend until the microphone stand reaches the lowest point and returns to the initial state.

[0032] Preferably, the single chip microcomputer in step S201 controls the steering gear to rotate until the laser beam emitted by the first laser radar forms a preset elevation angle α1 corresponding to the distance L1", which specifically includes:

[0033] Several groups of range values ​​of distance L" are stored in advance in the single chip microcomputer. Distance L" is the distance between the second laser radar and the user. At the same time, the elevation angle α corresponding to each group of range values ​​of distance L" is stored. The elevation angle α is the angle between the laser beam emitted by the first laser radar and the horizontal plane.

[0034] The beneficial effects of the present invention are as follows:

[0035] The present invention is mainly composed of an electric push rod and a lifting rod for clamping a microphone. At least two laser radars are installed on the lifting rod. According to the shielding conditions of the two laser radars, a single-chip microcomputer controls the electric push rod to rise or fall, and automatically adjusts the height of the microphone bracket according to different human body heights. The entire lifting process is completed automatically without the need for manual operation by the management personnel or the need for the management personnel to operate on stage. It saves manpower while ensuring the order of the meeting and is easy to use.

[0036] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of an automatically lifting microphone stand.

[0038] Figure 2 This is a schematic diagram of the electrical connection relationship of the microphone stand.

[0039] Figure 3 This is a schematic diagram of the application of lidar.

[0040] Figure 4 The invention is a flowchart of a method for controlling the automatic lifting of a microphone stand.

[0041] Figure 5 is a schematic structural diagram of a first connecting device.

[0042] Figure 6 is a schematic structural diagram of a second connecting device.

[0043] Figure 7 This is a schematic diagram of the distances L´ and L" when the laser radar is measuring distance.

[0044] Description of reference numerals:

[0045] 1. Chassis; 2. Electric push rod; 3. Microphone; 4. Lifting rod; 5. First laser radar; 6. Second laser radar; 7. Laser beam; 8. Single chip microcomputer; 9. Relay; 10. Power supply; 11. First connecting device; 12. First rotating member; 13. First fixing member; 14. User; 15. Second connecting device; 16. Second rotating member; 17. Second fixing member; 18. Servo;

[0046] 1201. U-shaped plate; 1202. L-shaped plate;

[0047] 1301. Mounting plate; 1302. Limiting plate; 1303. Through-rod hole;

[0048] 1601. Flat plate; 1602. First ear plate;

[0049] 1701. Annular clamp; 1702. Second ear plate; 1703. Third ear plate. DETAILED DESCRIPTION

[0050] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0051] It should be noted that, in the present invention, the up, down, left and right in the figure are regarded as the up, down, left and right of the automatically lifting microphone stand described in this specification.

[0052] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0053] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0054] First embodiment:

[0055] The first embodiment of the present invention relates to an automatically lifting microphone stand, referring to Figure 1 , including a chassis 1, an electric push rod 2 and a lifting rod 4 for clamping a microphone 3, which are connected in sequence from bottom to top. At least two distance measuring modules are installed axially on the rod wall of the lifting rod 4. The distance measuring module detects the distance between the user 14 in front of the microphone bracket and the distance measuring module and sends it to the single-chip microcomputer 8. The single-chip microcomputer 8 controls the electric push rod 2 to drive the lifting rod 4 to rise or fall through the relay 9. The single-chip microcomputer 8 is connected to the power supply 10. Figure 2 shown.

[0056] Any distance measurement module that can realize the distance measurement function can be selected as the present embodiment, such as an ultrasonic distance measurement module, an infrared distance measurement sensor module, a laser radar, etc., which can be purchased commercially and will not be described in detail here.

[0057] In order to clearly explain the structure and working principle of the microphone stand protected by the present invention, a laser radar is preferably used. Specifically, the present embodiment utilizes the ranging function of the laser radar. The single chip microcomputer 8 obtains the distance L' between the first laser radar 5 and the user 14, and compares the distance L' with the preset value L. If L'≤preset value L, it is considered that the first laser radar 5 is blocked. If L'>preset value L, it is considered that the first laser radar 5 is not blocked.

[0058] Reference Figure 7 , the single chip computer 8 obtains the distance L" between the second laser radar 6 and the user 14, and compares the distance L" with the preset value L. If the distance L"≤the preset value L, it is considered that the second laser radar 6 is blocked; if the distance L">the preset value L, it is considered that the second laser radar 6 is not blocked;

[0059] According to the signals of whether the first laser radar 5 and the second laser radar 6 are blocked or not, the single chip computer 8 controls the electric push rod 2 to drive the lifting rod 4 to rise or fall until it matches the height of the user 14.

[0060] It should be noted that the installation position of each laser radar, the distance between two adjacent laser radars, and the distance between the laser radar and the microphone can all be adjusted according to the environment of the conference site and the ranging parameters of the laser radar to achieve the best effect.

[0061] In this embodiment, the rise and fall of the electric push rod 2 are achieved through two sets of relays 9. Specifically, the single-chip microcomputer 8 sends a signal to drive the relay 9 to operate, thereby exchanging the positive and negative poles of the DC electric push rod input, so that the servo of the electric push rod 2 rotates forward or reverse, thereby achieving the rise and fall of the electric push rod 2.

[0062] The automatically lifting microphone stand protected by this embodiment operates automatically throughout the entire process, and automatically changes the height of the microphone stand according to the height of different people. There is no need for manual operation, and there is no need for management personnel to go on stage or remote control, thereby realizing the automatic lifting of the microphone stand.

[0063] The connection circuit between the two groups of relays 9 and the electric push rod 2 belongs to conventional technology and is not the protection object of this embodiment, so it will not be described in detail here.

[0064] The single chip microcomputer 8 can be selected from a variety of models with serial communication function. The present invention is specifically implemented using the stm32F405RGT6 model, which integrates the minimum system, serial communication circuit, and relay circuit into one board.

[0065] Second implementation method:

[0066] On the basis of the first embodiment, as a preference, the distance measuring module is a laser radar, and two laser radars are arranged on the upper and lower walls of the lifting rod 4, such as Figure 1 and Figure 2 As shown, from top to bottom are the first laser radar 5 and the second laser radar 6, the laser beam 7 emitted by the first laser radar 5 forms an elevation angle α with the horizontal plane, 0°≤α<90°, and the second laser radar 6 emits the laser beam horizontally;

[0067] The first laser radar 5 and the second laser radar 6 are both electrically connected to the single chip microcomputer 8 . The single chip microcomputer 8 controls the electric push rod 2 to drive the lifting rod 4 to rise or fall through the relay 9 . The single chip microcomputer 8 is connected to the power supply 10 .

[0068] The working principle of the automatic lifting microphone stand of this embodiment is as follows:

[0069] In the initial state, the electric push rod 2 is retracted, the microphone holder is at the lowest point, the first laser radar 5 emits the laser beam 7 obliquely upward, an initial angle α0 is formed between the laser beam 7 and the horizontal plane, and the second laser radar 6 emits the laser beam 7 horizontally;

[0070] The single chip microcomputer 8 controls the microphone stand to undergo the following changes according to the height of the user 14:

[0071] The first user 14 comes on stage and comes in front of the microphone stand. The single chip computer 8 obtains the distance L1" between the second laser radar 6 and the first user 14. If the distance L1" ≤ the preset value L, the single chip computer 8 controls the servo 18 to rotate until the laser beam 7 emitted by the first laser radar 5 forms a preset elevation angle α1 corresponding to the distance L1". Then the single chip computer 8 controls the microphone stand to rise until the second laser radar 6 is blocked and the first laser radar 5 is not blocked, and the microphone stand stops rising.

[0072] The first user 14 leaves the microphone stand, and the height of the microphone stand remains unchanged. The single-chip computer 8 controls the servo 18 to rotate until the laser beam 7 emitted by the first laser radar 5 and the horizontal plane return to the initial angle α0. The single-chip computer 8 starts timing from the time when the user 14 leaves the microphone stand and the two laser radars are not blocked at the same time, and records the time T when the two laser radars are not blocked, and compares it with T´ pre-stored in the single-chip computer 8. If T≤T´, the height of the microphone stand remains unchanged. If T>T´, the single-chip computer 8 controls the microphone stand to descend. During the descent, the second user 14 comes on stage and comes to the front of the microphone stand.

[0073] The second user 14 comes on stage and moves in front of the microphone stand. The single chip microcomputer 8 obtains L2" of the second laser radar 6 and the second user 14. If L2" ≤ the preset value L, the single chip microcomputer 8 controls the steering gear 18 to rotate until the laser beam 7 emitted by the first laser radar 5 forms a preset elevation angle α2 corresponding to L2". At the same time:

[0074] If the first laser radar 5 is not blocked and the second laser radar 6 is blocked, the single chip computer 8 controls the microphone stand to descend until the first laser radar 5 and the second laser radar 6 are blocked at the same time, the microphone stand stops descending and then immediately rises, until the second laser radar 6 is blocked and the first laser radar 5 is not blocked, the microphone stand stops rising;

[0075] If the first laser radar 5 and the second laser radar 6 are blocked at the same time, the single chip computer 8 controls the microphone stand to rise until the second laser radar 6 is blocked and the first laser radar 5 is not blocked, and the microphone stand stops rising;

[0076] The second user 14 leaves the microphone stand, and the next user 14 comes on stage to the front of the microphone stand, and repeats step S203 until the first laser radar 5 and the second laser radar 6 are both unblocked. The single-chip microcomputer 8 controls the microphone stand to descend until the microphone stand reaches the lowest point and returns to the initial state.

[0077] It is worth mentioning that in the initial state, that is, when the microphone stand is not put into use, the microphone stand is at the lowest point. When the first user 14 comes to the front of the microphone stand, the microphone stand rises. When the first user 14 finishes speaking and leaves, the height of the microphone stand remains unchanged. The second user 14 comes to the front of the microphone stand. According to the obstruction of the laser radar, the microphone stand will undergo the following changes: if the first laser radar 5 is not obstructed and the second laser radar 6 is obstructed, the single-chip microcomputer 8 controls the microphone stand to descend until the first laser radar 5 and the second laser radar 6 are blocked at the same time, the microphone stand stops descending and then immediately rises until the second laser radar 6 is blocked and the first laser radar 5 is not blocked, the microphone stand stops rising; if the first laser radar 5 and the second laser radar 6 are blocked at the same time, the single-chip microcomputer 8 controls the microphone stand to rise until the second laser radar 6 is blocked and the first laser radar 5 is not blocked, the microphone stand stops rising.

[0078] That is to say, this embodiment has three working states:

[0079] (1) When the two laser radar modules are blocked at the same time, the two relays 9 act accordingly, the electric push rod 2 works, and the microphone stand rises in height;

[0080] (2) When only one laser radar module at a lower height (the second laser radar 6) is blocked, the two relays 9 act accordingly, the electric push rod 2 stops working, and the height of the microphone stand is fixed;

[0081] (3) When the two groups of laser radar modules are not blocked at the same time and after a delay, the two groups of relays 9 act accordingly, the positive and negative inputs are exchanged, the electric push rod 2 works, and the height of the microphone stand drops.

[0082] Third embodiment:

[0083] On the basis of the second embodiment, in order to facilitate the transportation, assembly and disassembly of the microphone stand, in this embodiment, the chassis 1 and the bottom plate of the electric push rod 2 are detachably connected, such as by snap connection, rotation connection, bolt connection, etc.

[0084] Reference Figure 1 and Figure 3 The first laser radar 5 is detachably mounted on the rod wall of the lifting rod 4 through a first connecting device 11, and the first laser radar 5 can rotate around the first connecting device 11; the second laser radar 6 is detachably mounted on the rod wall of the lifting rod 4 through a second connecting device 15, and the second laser radar 6 can rotate around the second connecting device 15.

[0085] Specifically, Figure 5 As shown, the first connecting device 11 is composed of two parts, namely a first rotating member 12 and a second fixed member 13;

[0086] The first rotating member 12 at least includes a U-shaped plate 1201 and an L-shaped plate 1202, and the back surface of the L-shaped plate 1202 is fixed to the middle plate of the U-shaped plate 1201;

[0087] The second fixing member 13 comprises at least two mounting plates 1301 arranged in parallel up and down, a steering gear 18 is mounted between the two mounting plates 1301, an upper plate surface of the mounting plate 1301 above the steering gear 18 and a lower plate surface of the mounting plate 1301 below the steering gear 18 are respectively vertically fixed with a limiting plate 1302, the two limiting plates 1302 are in the same plane, and a rod hole 1303 for the lifting rod 4 to pass through is opened on the plate surface of the mounting plate 1301 on the same side of each limiting plate 1302;

[0088] The first laser radar 5 is installed at the angle of the L-shaped plate 1202. The two side arms of the U-shaped plate 1201 are clamped and installed on the servo 18. The servo 18 is electrically connected to the single-chip microcomputer 8. The single-chip microcomputer 8 controls the rotation angle of the first laser radar 5 through the servo 18 to change the emission angle of the laser beam 7.

[0089] Refer to 1 and Figure 5 The lifting rod 4 passes through the rod hole 1303, and the two are connected by other components such as a pin shaft or a bolt, so that the first connecting device 11 can be detachably installed on the rod wall of the lifting rod 4, and the first laser radar 5 is installed on the L-shaped plate 1202 of the first connecting device 11. Figure 5 shown.

[0090] It should be noted that the function of the servo 18 is to drive the U-shaped plate 1201 to rotate, and the first laser radar 5 is installed on the U-shaped plate 1201, so the direction of the laser beam 7 emitted by the first laser radar 5 can be realized. Therefore, any servo that can realize the rotation function can be used, and the servo's own bracket can also be used to realize the rotation of the first laser radar 5.

[0091] Reference Figure 6 , the second connecting device 15 is composed of two parts, namely a second rotating member 16 and a second fixed member 17;

[0092] The second rotating member 16 includes a flat plate 1601, and the flat plate 1601 has two parallel and opposite plate surfaces, one of which is used to install the second laser radar 6, and the center of the other plate surface vertically extends outward to form two parallel and opposite first ear plates 1602, and each first ear plate 1602 has a through hole on its plate surface;

[0093] The second fixing member 17 includes an annular hoop 1701 with a tightening end for encircling the lifting rod 4, the tightening end of the annular hoop 1701 is two second ear plates 1702 connected by a pin shaft, and the outer wall of the annular hoop 1701 opposite to the second ear plate 1702 is provided with a third ear plate 1703 which can be inserted between the two first ear plates 1602, and a through hole is provided on the plate surface of the third ear plate 1703, and the third ear plate 1703 is clamped between the two first ear plates 1602 and connected by a pin shaft inserted into the through hole.

[0094] In order to ensure the firm clamping between the second rotating member 16 and the second fixed member 17, the structure between the two first ear plates 1602 is divided into a solid body and a hollow cavity. The part close to the flat plate 1601 is solid, and the shape of the hollow cavity for inserting the third ear plate 1703 is the same as the shape of the third ear plate 1703. The third ear plate 1703 is inserted into the cavity, and the third ear plate 1703 and the first ear plate 1602 are connected by a pin shaft. The first rotating member 12 rotates around the third ear plate 1703 to adjust the angle of the laser radar.

[0095] Specifically, the working process of the second connecting device 15 is as follows:

[0096] Put the annular hoop 1701 on the lifting rod 4 and tighten it. Hold the second fixing piece 17 and loosen the pin of the second ear plate 1702 of the annular hoop 1701. The annular hoop 1701 slides up and down along the rod wall of the lifting rod 4 until it reaches a preset position, stops sliding, and tightens the second fixing piece 17 through the pin. Hold the second rotating piece 16 on which the laser radar is installed, pull out the pin between the first ear plate 1602 and the third ear plate 1703, rotate the second rotating piece 16 up and down until the laser beam 7 of the laser radar reaches a preset angle, insert the pin into the through hole, and connect the first ear plate 1602 and the third ear plate 1703.

[0097] This embodiment is a preferred solution for the first connecting device 11 and the second connecting device 15, but is not limited thereto. Any device that can realize the installation and rotation of the laser radar can be used.

[0098] In addition, in the present embodiment, the electric push rod 2 at least includes a fixed outer tube and a telescopic inner rod, one end of the telescopic inner rod is inserted into the fixed outer tube, and the other end of the telescopic inner rod is connected to the bottom end of the lifting rod 4, and the axial center line of the lifting rod 4 coincides with the axial center line of the telescopic inner rod.

[0099] The function of the electric push rod 2 is to drive the lifting rod 4 to rise or fall. Therefore, a suitable type of electric push rod 2 can be purchased from the market according to the actual needs of the conference site. For example, when there are children users, a large-stroke electric push rod 2 can be selected to adapt to the height of the children.

[0100] Fourth embodiment:

[0101] This embodiment protects a method for controlling the automatic lifting of a microphone stand, comprising the following steps:

[0102] Reference Figure 7 , obtain the distance L´ between the first laser radar 5 and the user 14, compare the distance L´ with the preset value L, if L´≤preset value L, it is considered that the first laser radar 5 is blocked, if L´>preset value L, it is considered that the first laser radar 5 is not blocked;

[0103] Obtain the distance L" between the second laser radar 6 and the user 14, compare the distance L" with the preset value L, if the distance L"≤the preset value L, it is considered that the second laser radar 6 is blocked, if the distance L">the preset value L, it is considered that the second laser radar 6 is not blocked;

[0104] According to different combinations of whether the first laser radar 5 and the second laser radar 6 are blocked or not, the single chip computer 8 controls the electric push rod 2 to drive the lifting rod 4 to rise or fall until it matches the height of the user 14.

[0105] Specifically, the single chip computer 8 compares the distance L" with the preset value L. If the distance L"≤the preset value L, it is considered that the laser radar is blocked, such as 0.8m<1m, it is considered that the second laser radar 6 is blocked; if the distance L">the preset value L, it is considered that the laser radar is not blocked, such as 1.5m>1m, it is considered that the first laser radar 5 is not blocked;

[0106] The single chip microcomputer 8 controls the electric push rod 2 to drive the lifting rod 4 to rise or fall until it matches the height of the user 14 according to whether the laser radar is blocked or not.

[0107] The specific steps include:

[0108] S001. In the initial state, the electric push rod 2 is retracted, the microphone holder is at the lowest point, the first laser radar 5 emits a laser beam 7 obliquely upward, and an initial angle α0 is formed between the laser beam 7 and the horizontal plane, and the second laser radar 6 emits a laser beam 7 horizontally;

[0109] S002. The microcontroller 8 controls the microphone stand to undergo the following changes according to the height of the user 14:

[0110] S201. The first user 14 comes on stage and comes in front of the microphone stand. The single chip microcomputer 8 obtains the distance L1" between the second laser radar 6 and the first user 14. If the distance L1" ≤ the preset value L, the single chip microcomputer 8 controls the servo 18 to rotate until the laser beam 7 emitted by the first laser radar 5 forms a preset elevation angle α1 corresponding to the distance L1", and then the single chip microcomputer 8 controls the microphone stand to rise until the second laser radar 6 is blocked and the first laser radar 5 is not blocked, and the microphone stand stops rising;

[0111] S202. The first user 14 leaves the microphone stand, and the height of the microphone stand remains unchanged. The single-chip computer 8 controls the servo 18 to rotate until the laser beam 7 emitted by the first laser radar 5 and the horizontal plane return to the initial angle α0. The single-chip computer 8 starts timing from the time when the user 14 leaves the microphone stand and the two laser radars are not blocked at the same time, and records the time T when the two laser radars are not blocked, and compares it with T´ pre-stored in the single-chip computer 8. If T≤T´, the height of the microphone stand remains unchanged. If T>T´, the single-chip computer 8 controls the microphone stand to descend. During the descent, the second user 14 comes on stage and comes to the front of the microphone stand;

[0112] S203. The second user 14 comes on stage and comes in front of the microphone stand. The single chip microcomputer 8 obtains L2" of the second laser radar 6 and the second user 14. If L2"≤preset value L, the single chip microcomputer 8 controls the steering gear 18 to rotate until the laser beam 7 emitted by the first laser radar 5 forms a preset elevation angle α2 corresponding to L2". At the same time:

[0113] If the first laser radar 5 is not blocked and the second laser radar 6 is blocked, the single chip computer 8 controls the microphone stand to descend until the first laser radar 5 and the second laser radar 6 are blocked at the same time, the microphone stand stops descending and then immediately rises, until the second laser radar 6 is blocked and the first laser radar 5 is not blocked, the microphone stand stops rising;

[0114] If the first laser radar 5 and the second laser radar 6 are blocked at the same time, the single chip computer 8 controls the microphone stand to rise until the second laser radar 6 is blocked and the first laser radar 5 is not blocked, and the microphone stand stops rising;

[0115] S204. The second user 14 leaves the microphone stand, and the next user 14 comes on stage to the front of the microphone stand, and repeats step S203 until the first laser radar 5 and the second laser radar 6 are both unobstructed. The single-chip microcomputer 8 controls the microphone stand to descend until the microphone stand reaches the lowest point and returns to the initial state.

[0116] If there is a third user 14, a fourth user 14, and so on, refer to the above lifting method.

[0117] In particular, the distance in this embodiment refers to the distance between the laser radar and the user, specifically refers to the distance of the laser beam, and is not necessarily a horizontal distance. For example, the laser beam 7 of the first laser radar 5 is emitted obliquely upward, and its distance refers to the distance from the emission point of the laser beam to the target. The above is common knowledge of laser radar and other ranging modules and will not be described in detail here.

[0118] In order to facilitate the description of how this embodiment is specifically operated, Figure 4 As shown in FIG. 1 , it is one example of this embodiment. When the user 14 approaches the microphone stand, the two laser radars are blocked, and the microphone stand rises. During the rising process, only the laser radar of the lower height (the second laser radar 6) is blocked, and the first laser radar 5 is not blocked. The microphone stand stops rising, and the user 14 leaves. At this time, in order to avoid the microphone stand from falling when the user 14 leaves for a short time during use, it is necessary to delay for a period of time to enter the falling state after the user 14 leaves. When the microphone stand is resumed in the middle of use, it still retains its position. This delay time can be controlled by the single chip microcomputer 8. That is to say, after the previous user 14 leaves the microphone stand, the height of the microphone stand remains unchanged, and the holding time can be set by the single-chip microcomputer 8, for example, for 3 seconds (T´). If the two laser radars are not blocked within 3 seconds after the previous user 14 leaves, the height of the microphone stand remains unchanged; if the laser radar is blocked in the 4th second after the previous user 14 leaves, that is, T (4 seconds) > T´ (3 seconds), the single-chip microcomputer 8 controls the microphone stand to descend, and during the descent, the second user 14 comes on stage to the front of the microphone stand;

[0119] In this embodiment, if Figure 2 As shown, the power supply 10 supplies power to the relay 9 and the single-chip microcomputer 8. The first laser radar 5 and the second laser radar 6 send a status signal (whether blocked or not) to the single-chip microcomputer 8. The single-chip microcomputer 8 controls the action of the relay 9 according to the pre-input logic, so that the servo of the electric push rod 2 rotates forward or reverse, thereby achieving the purpose of adjusting the height of the microphone stand and eliminating the trouble of manual operation.

[0120] It can be seen that the method for controlling the automatic lifting of the microphone stand protected by this embodiment is fully automatic, and the corresponding height of the microphone stand is automatically changed according to the height of different people. There is no need for manual operation, and there is no need for management personnel to go on stage or remote control, thereby realizing the automatic lifting of the microphone stand.

[0121] Sixth embodiment:

[0122] Reference Figure 2, the single chip microcomputer 8 in step S201 controls the steering engine 18 to rotate until the laser beam 7 emitted by the first laser radar 5 forms a preset elevation angle α1 corresponding to the distance L1", specifically including:

[0123] Several groups of range values ​​of the distance L" are stored in advance in the single chip computer 8, where the distance L" is the distance between the second laser radar 6 and the user 14, and the elevation angle α corresponding to each group of range values ​​of the distance L" is stored at the same time, where the elevation angle α is the angle between the laser beam 7 emitted by the first laser radar 5 and the horizontal plane.

[0124] In order to conveniently explain the relationship between the distance L" and the elevation angle α, under the premise that the distance between the first laser radar 5 and the microphone 3 is 10 cm, this embodiment provides the following table as an example:

[0125] Distance L" 0~30cm 30cm~60cm 60cm~100cm Elevation angle α 59° 29.1° 17.4°

[0126] That is to say, three sets of data can be input into the single chip computer 8 in advance:

[0127] Group 1: If 0<L"≤30cm, then the elevation angle α=59°;

[0128] That is, if the distance L" between the second laser radar 6 and the user 14 is 15 cm, the first laser radar 5 should emit a laser beam 7 that forms an angle of 59° with the horizontal plane;

[0129] Group 2: If 30<L"≤60cm, then the elevation angle α=29.1°;

[0130] That is, if the distance L" between the second laser radar 6 and the user 14 is 45 cm, the first laser radar 5 should emit a laser beam 7 that forms an angle of 29.1° with the horizontal plane;

[0131] Group 3: If 60<L"≤100cm, then the elevation angle α=17.4°;

[0132] That is, if the distance L" between the second laser radar 6 and the user 14 is 80 cm, the first laser radar 5 should emit a laser beam 7 that forms an angle of 17.4° with the horizontal plane.

[0133] The above data is obtained through multiple tests under the premise that the distance between the first laser radar 5 and the microphone 3 is 10 cm, but it is only an example and can be adjusted as needed, and is not limited to this.

[0134] In summary, the present invention protects an automatically lifting microphone stand and a method for controlling the automatic lifting of the microphone stand. The microphone stand includes a chassis, an electric push rod, and a lifting rod for clamping the microphone, which are connected in sequence from bottom to top. At least two laser radars arranged up and down are installed on the rod wall of the lifting rod, which are the first laser radar and the second laser radar from top to bottom. The laser beam of the first laser radar forms an elevation angle with the horizontal plane, and the laser beam of the second laser radar coincides with the horizontal plane. The first laser radar and the second laser radar are both electrically connected to a single-chip microcomputer. The single-chip microcomputer controls the electric push rod to drive the lifting rod to rise or fall through a relay, and the single-chip microcomputer is connected to a power supply. According to the shielding conditions of the two laser radars, the single-chip microcomputer controls the electric push rod to rise or fall, and automatically adjusts the height of the microphone stand according to different human body heights. The entire lifting process is automatically completed without the need for manual operation by the management personnel, and the management personnel do not need to go on stage to operate. While ensuring the order of the meeting, it saves manpower and is easy to use.

[0135] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A method for controlling the automatic lifting of a microphone stand, characterized in that: The following steps are involved: Obtaining a distance L´ between the first laser radar (5) and the user (14), comparing the distance L´ with a preset value L, and if L´≤preset value L, then the first laser radar (5) is deemed to be blocked; if L´>preset value L, then the first laser radar (5) is deemed to be unblocked; Obtaining a distance L" between the second laser radar (6) and the user (14), comparing the distance L" with a preset value L, and if the distance L" ≤ the preset value L, then the second laser radar (6) is deemed to be blocked; if the distance L" > the preset value L, then the second laser radar (6) is deemed to be unblocked; According to different combinations of whether the first laser radar (5) and the second laser radar (6) are blocked or not blocked, the single chip computer (8) controls the electric push rod (2) to drive the lifting rod (4) to rise or fall until it matches the height of the user (14); According to different combinations of whether the first laser radar (5) and the second laser radar (6) are blocked or not blocked, the single chip computer (8) controls the electric push rod (2) to drive the lifting rod (4) to rise or fall until it matches the height of the user (14), specifically comprising the following steps: S001. In the initial state, the electric push rod (2) is retracted, the microphone stand is at the lowest point, the first laser radar (5) emits a laser beam (7) obliquely upward, an initial angle α0 is formed between the laser beam (7) and the horizontal plane, and the second laser radar (6) emits a laser beam (7) horizontally; S002. The microcontroller (8) controls the microphone stand to undergo the following changes according to the height of the user (14): S201. The first user (14) comes on stage and comes in front of the microphone stand. The single chip computer (8) obtains the distance L1" between the second laser radar (6) and the first user (14). If the distance L1" ≤ the preset value L, the single chip computer (8) controls the servo (18) to rotate until the laser beam (7) emitted by the first laser radar (5) forms a preset elevation angle α1 corresponding to the distance L1", and then the single chip computer (8) controls the microphone stand to rise until the second laser radar (6) is blocked and the first laser radar (5) is not blocked, and the microphone stand stops rising; S202. The first user (14) leaves the microphone stand, and the height of the microphone stand remains unchanged. The single chip computer (8) controls the servo (18) to rotate until the laser beam (7) emitted by the first laser radar (5) returns to the initial angle α0 with the horizontal plane. The single chip computer (8) starts timing from the time when the user (14) leaves the microphone stand and the two laser radars are not blocked at the same time, and records the time T when the two laser radars are not blocked. It is compared with T´ pre-stored in the single chip computer (8). If T≤T´, the height of the microphone stand remains unchanged. If T>T´, the single chip computer (8) controls the microphone stand to descend. During the descent, the second user (14) comes on stage and comes to the front of the microphone stand. S203. The second user (14) comes on stage and stands in front of the microphone stand. The single chip computer (8) obtains L2" of the second laser radar (6) and the second user (14). If L2" ≤ the preset value L, the single chip computer (8) controls the steering gear (18) to rotate until the laser beam (7) emitted by the first laser radar (5) forms a preset elevation angle α2 corresponding to L2". At the same time: If the first laser radar (5) is not blocked and the second laser radar (6) is blocked, the single chip computer (8) controls the microphone stand to descend until both the first laser radar (5) and the second laser radar (6) are blocked at the same time, the microphone stand stops descending and then immediately rises, until the second laser radar (6) is blocked and the first laser radar (5) is not blocked, the microphone stand stops rising; If the first laser radar (5) and the second laser radar (6) are blocked at the same time, the single chip computer (8) controls the microphone stand to rise until the second laser radar (6) is blocked and the first laser radar (5) is not blocked, and the microphone stand stops rising; S204. The second user (14) leaves the microphone stand, and the next user (14) comes on stage and comes in front of the microphone stand, and repeats step S203 until the first laser radar (5) and the second laser radar (6) are both unobstructed. The single-chip microcomputer (8) controls the microphone stand to descend until the microphone stand reaches the lowest point and returns to the initial state.

2. The method for controlling the automatic lifting of a microphone stand according to claim 1, characterized in that: The single chip computer (8) in step S201 controls the steering engine (18) to rotate until the laser beam (7) emitted by the first laser radar (5) forms a preset elevation angle α1 corresponding to the distance L1", specifically comprising: A plurality of sets of range values ​​of distance L" are stored in advance in the single chip computer (8), where the distance L" is the distance between the second laser radar (6) and the user (14), and an elevation angle α corresponding to each set of range values ​​of the distance L" is stored, where the elevation angle α is the angle between the laser beam (7) emitted by the first laser radar (5) and the horizontal plane.

3. An automatically lifting microphone stand, used to implement the method for controlling the automatic lifting of the microphone stand according to claim 1 or 2, characterized in that: The invention comprises a chassis (1), an electric push rod (2) and a lifting rod (4) for clamping a microphone (3) which are connected in sequence from bottom to top. At least two distance measuring modules are axially mounted on the rod wall of the lifting rod (4). The distance measuring modules detect the distance between a user (14) in front of the microphone bracket and the distance measuring modules and transmit the information to a single chip microcomputer (8). The single chip microcomputer (8) controls the electric push rod (2) through a relay (9) to drive the lifting rod (4) to rise or fall. The single chip microcomputer (8) is connected to a power supply (10).

4. The automatic lifting microphone stand according to claim 3, characterized in that: The distance measurement module is a laser radar. Two laser radars are arranged on the upper and lower walls of the lifting rod (4), which are respectively a first laser radar (5) and a second laser radar (6) from top to bottom. The laser beam (7) emitted by the first laser radar (5) forms an elevation angle α with the horizontal plane, and the second laser radar (6) emits the laser beam (7) horizontally.

5. The automatic lifting microphone stand according to claim 4, characterized in that: The first laser radar (5) is detachably mounted on the rod wall of the lifting rod (4) via a first connecting device (11), and the first laser radar (5) can rotate around the first connecting device (11); the second laser radar (6) is detachably mounted on the rod wall of the lifting rod (4) via a second connecting device (15), and the second laser radar (6) can rotate around the second connecting device (15).

6. The automatic lifting microphone stand according to claim 5, characterized in that: The first connecting device (11) is composed of two parts, namely a first rotating part (12) and a second fixed part (13); The first rotating member (12) comprises at least a U-shaped plate (1201) and an L-shaped plate (1202), wherein the back surface of the L-shaped plate (1202) is fixedly connected to the middle plate of the U-shaped plate (1201); The second fixing member (13) comprises at least two mounting plates (1301) arranged in parallel up and down, a steering gear (18) is mounted between the two mounting plates (1301), an upper plate surface of the mounting plate (1301) above the steering gear (18) and a lower plate surface of the mounting plate (1301) below the steering gear (18) are respectively vertically fixed with a limiting plate (1302), the two limiting plates (1302) are located in the same plane, and a rod hole (1303) for a lifting rod (4) to pass through is opened on the plate surface of the mounting plate (1301) on the same side of each limiting plate (1302); The first laser radar (5) is installed at the angle of the L-shaped plate (1202), and the two side arms of the U-shaped plate (1201) are clamped and installed on the steering gear (18). The steering gear (18) is electrically connected to the single-chip computer (8), and the single-chip computer (8) controls the rotation angle of the first laser radar (5) through the steering gear (18) to change the emission angle of the laser beam (7).

7. The automatically lifting microphone stand according to claim 5, characterized in that: The second connecting device (15) is composed of two parts, namely a second rotating part (16) and a second fixed part (17); The second rotating member (16) comprises a flat plate (1601), the flat plate (1601) having two parallel and opposite plate surfaces, one of which is used to mount the second laser radar (6), and the center of the other plate surface vertically extends outward to form two parallel and opposite first ear plates (1602), and each first ear plate (1602) has a through hole on its plate surface; The second fixing member (17) comprises an annular hoop (1701) having a tightening end for encircling the lifting rod (4); the tightening end of the annular hoop (1701) is two second ear plates (1702) connected by a pin shaft; the outer wall of the annular hoop (1701) opposite to the second ear plate (1702) is provided with a third ear plate (1703) which can be inserted between the two first ear plates (1602); a through hole is provided on the plate surface of the third ear plate (1703); the third ear plate (1703) is clamped between the two first ear plates (1602) and connected by a pin shaft inserted into the through hole.

8. The automatically lifting microphone stand according to claim 7, characterized in that: The structure between the two first ear plates (1602) is divided into a solid body and a hollow cavity. The portion close to the flat plate (1601) is solid, and the shape of the hollow cavity for inserting the third ear plate (1703) is the same as that of the third ear plate (1703).

9. The automatically lifting microphone stand according to claim 3, characterized in that: The electric push rod (2) comprises at least a fixed outer tube and a telescopic inner rod, one end of the telescopic inner rod is inserted into the fixed outer tube, the other end of the telescopic inner rod is connected to the bottom end of the lifting rod (4), and the axial center line of the lifting rod (4) coincides with the axial center line of the telescopic inner rod.

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