阅读说明：本技术 防倾斜升降桌控制系统和方法 (Anti-tilt lift table control system and method ) 是由 邵李焕 于 2020-12-18 设计创作，主要内容包括：本发明公开了一种防倾斜升降桌控制系统和方法,至少包括倾斜检测装置和升降桌控制单元,其中,升降桌控制单元用于根据倾斜检测装置的检测信息控制电机的启停以防止在桌面倾斜的情况下电机继续工作；倾斜检测装置与被检平面固定连接,至少包括壳体及其与该壳体固定连接的至少一水准管,所述水准管内装有液体且设置一气泡,所述气泡的位置用于跟随该装置倾斜角度而变化；该装置内还设置传感器,所述传感器用于检测气泡位置信息,以此判断出是否处于倾斜状态并将结果信息发送给所述升降桌控制单元。(The invention discloses a control system and a control method for an anti-tilt lifting table, which at least comprise a tilt detection device and a lifting table control unit, wherein the lifting table control unit is used for controlling the starting and stopping of a motor according to the detection information of the tilt detection device so as to prevent the motor from continuously working under the condition that a table top is tilted; the inclination detection device is fixedly connected with a detected plane and at least comprises a shell and at least one leveling tube fixedly connected with the shell, liquid is filled in the leveling tube and a bubble is arranged in the leveling tube, and the position of the bubble is used for changing along with the inclination angle of the device; the device is also internally provided with a sensor, and the sensor is used for detecting bubble position information so as to judge whether the device is in an inclined state and send result information to the lifting table control unit.)

1. An anti-tilt lifting table control system is characterized by at least comprising a tilt detection device and a lifting table control unit, wherein,

the lifting table control unit is used for controlling the starting and stopping of the motor according to the detection information of the inclination detection device so as to prevent the motor from continuously working under the condition that the table top is inclined;

the inclination detection device is fixedly connected with a detected plane and at least comprises a shell and at least one leveling tube fixedly connected with the shell, liquid is filled in the leveling tube and a bubble is arranged in the leveling tube, and the position of the bubble is used for changing along with the inclination angle of the device; the device is also internally provided with a sensor, and the sensor is used for detecting bubble position information so as to judge whether the device is in an inclined state and send result information to the lifting table control unit.

2. The tilt-resistant lift table control system of claim 1, wherein the sensor is an infrared sensor or a laser detector.

3. The tilt-prevention lifting table control system according to claim 1, wherein infrared sensors are respectively disposed at both ends of the leveling tube, the infrared sensors are used for transmitting infrared signals and receiving reflected signals, and when the device is in a horizontal state, the infrared signals transmitted by the two infrared sensors are both on the liquid surface; when the device is in a tilted state, at least one infrared sensor emits an infrared signal at the surface of the bubble, wherein the reflected signals of the liquid surface and the bubble surface are significantly different.

4. The tilt-prevention lift table control system of claim 3, wherein the tilt detection device further comprises a detection unit connected to the infrared sensor for obtaining the received reflected signal and determining the tilt status of the device accordingly.

5. The tilt-resistant lift table control system of claim 3, wherein the infrared sensor is disposed in a closed housing.

6. The tilt-prevention lift table control system according to claim 4, wherein the detection unit comprises at least a control module and an interface module, the interface module is connected to the lift table control unit for sending result information calculated by the control module to the lift table control unit.

7. The tilt sensing device of claim 6, wherein the interface module is further connected to an external power source for providing power to the control module and the infrared sensor.

8. The tilt sensing device of claim 6, wherein two level tubes are provided for sensing tilt in the X and Y directions, respectively.

9. A control method for an anti-tilt lifting table is characterized by comprising the following steps:

step S1: arranging at least one leveling tube, and reflecting the inclination condition of the detected plane through the position change of air bubbles in the leveling tube;

step S2: the method comprises the following steps of arranging infrared sensors to detect position changes of bubbles in a leveling pipe, wherein the infrared sensors are arranged at two ends of the leveling pipe respectively, when the leveling pipe is in a horizontal state, infrared signals emitted by the two infrared sensors are on the surface of a liquid, when the device is in an inclined state, the infrared signals emitted by at least one infrared sensor are on the surface of the bubbles, and the inclined state is obtained by utilizing the difference of the reflectivity of the surface of the liquid and the surface of the bubbles to the infrared signals;

step S3: the start and stop of the motor is controlled according to the tilt state acquired in step S2 to prevent the motor from continuing to operate in case the desk is tilted.

10. The tilt control method of claim 9, wherein in step S2, the detection of the tilt state is implemented by using a comparison circuit, wherein the input terminal of the comparison circuit is the received reflection signal of the infrared sensor.

Technical Field

The invention relates to the technical field of lifting tables, in particular to a control system and method for an anti-inclination lifting table.

Background

With the development of science and technology and economy, the lifting table is more and more widely applied in life. The lifting table usually adopts a plurality of motors to independently control the lifting of each table leg, but when the mechanical failure occurs, the position sensing of the motors is normal, but the actual table top is inclined, and the system cannot detect the inclined state of the table top; that is, in this case, if there is an idle rotation phenomenon in one motor and the other motors are normally operated, it may cause the table top to be actually tilted but the position sensing signal is still normal. This situation may affect the normal use of the lifting table, for example, cause the object on the table top to fall off, and even cause the damage of the lifting mechanism. Therefore, the lifting table control system usually needs to detect the inclination of the table top so as to control the start and stop of the motor and avoid the continuous work of the motor under the condition that the table top is inclined.

At present, in the prior art, a gyroscope or an attitude sensor is usually adopted to detect the inclination angle of the lifting table, so that certain detection precision can be achieved, but the cost is higher, meanwhile, the technical scheme is applied for patent protection by foreign competitors, domestic enterprises adopt the technical scheme to manufacture lifting table tops and face higher intellectual property risks, and particularly, products are exported to the foreign countries.

Therefore, it is necessary to provide a technical solution to solve the technical problems of the prior art.

Disclosure of Invention

In view of the above, it is necessary to provide a tilt-prevention control system and method for a lift table, which use a leveling tube and a sensor to detect the tilt of the lift table, so that a gyroscope is not required, and the tilt-prevention control system has the advantages of simple circuit structure, convenience in implementation, low cost, and the like.

In order to solve the technical problems in the prior art, the technical scheme of the invention is as follows:

an anti-tilt lifting table control system at least comprises a tilt detection device and a lifting table control unit, wherein,

the lifting table control unit is used for controlling the starting and stopping of the motor according to the detection information of the inclination detection device so as to prevent the motor from continuously working under the condition that the table top is inclined;

the inclination detection device is fixedly connected with a detected plane and at least comprises a shell and at least one leveling tube fixedly connected with the shell, liquid is filled in the leveling tube and a bubble is arranged in the leveling tube, and the position of the bubble is used for changing along with the inclination angle of the device; the device is also internally provided with a sensor, and the sensor is used for detecting bubble position information so as to judge whether the device is in an inclined state and send result information to the lifting table control unit.

As a further improvement, the sensor adopts an infrared sensor or a laser detector.

As a further improvement scheme, two ends of the leveling pipe are respectively provided with an infrared sensor, the infrared sensors are used for sending infrared signals and receiving reflected signals, and when the device is in a horizontal state, the infrared signals sent by the two infrared sensors are on the liquid surface; when the device is in a tilted state, at least one infrared sensor emits an infrared signal at the surface of the bubble, wherein the reflected signals of the liquid surface and the bubble surface are significantly different.

As a further improvement, the tilt detection device further comprises a detection unit, and the detection unit is connected with the infrared sensor and is used for acquiring the received reflected signal and judging the tilt state of the device according to the acquired reflected signal.

As a further improvement, the infrared sensor is arranged in the closed housing.

As a further improvement, the detection unit at least comprises a control module and an interface module, and the interface module is connected with the lifting table control unit and is used for sending result information calculated by the control module to the lifting table control unit.

As a further improvement, the interface module is further connected with an external power supply, and is used for supplying power to the control module and the infrared inductor.

As a further improvement, the device is provided with two level tubes for detecting the inclination in the X-direction and the Y-direction, respectively.

The invention discloses a control method of an anti-inclination lifting table, which comprises the following steps:

step S1: arranging at least one leveling tube, and reflecting the inclination condition of the detected plane through the position change of air bubbles in the leveling tube;

step S2: the method comprises the following steps of arranging infrared sensors to detect position changes of bubbles in a leveling pipe, wherein the infrared sensors are arranged at two ends of the leveling pipe respectively, when the leveling pipe is in a horizontal state, infrared signals emitted by the two infrared sensors are on the surface of a liquid, when the device is in an inclined state, the infrared signals emitted by at least one infrared sensor are on the surface of the bubbles, and the inclined state is obtained by utilizing the difference of the reflectivity of the surface of the liquid and the surface of the bubbles to the infrared signals;

step S3: the start and stop of the motor is controlled according to the tilt state acquired in step S2 to prevent the motor from continuing to operate in case the desk is tilted. .

As a further improvement, two level tubes are provided for detecting the inclination in the X-direction and the Y-direction, respectively.

As a further improvement, the level tube and the infrared sensor are arranged in a closed housing.

As a further improvement, in step S2, the detection of the tilt state is implemented by using a comparison circuit, wherein an input end of the comparison circuit is a received reflection signal of the infrared sensor.

Compared with the prior art, the inclination detection of the lifting table is realized by adopting the leveling tube and the infrared sensor, so that a gyroscope is not required, and the patent layout of foreign companies in the field can be avoided; in addition, the technical scheme of the invention has the advantages of simple circuit structure, convenient realization, low cost and the like. Simultaneously, adopt this technical scheme, the lift table is under the condition that receives external force striking, and bubble position has obvious change in the air level pipe to the detection that can be convenient inclines the condition, avoids continuing work by the motor under the condition that receives external force striking.

Drawings

FIG. 1 is a schematic block diagram of a tilt-resistant lift table control system.

Fig. 2 is a schematic block diagram of the tilt detection apparatus of the present invention.

Fig. 3 is a schematic block diagram of a preferred embodiment of the tilt detection apparatus of the present invention.

Fig. 4 is a schematic structural view of a preferred embodiment of the tilt sensing device according to the present invention.

The following specific embodiments will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solution provided by the present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1, the anti-tilt lifting table control system provided by the present invention at least includes a tilt detection device and a lifting table control unit, wherein the lifting table control unit is configured to control start and stop of a motor according to detection information of the tilt detection device so as to prevent the motor from continuing to work when a table top is tilted; that is, when the lifting table is in an inclined state, the inclination detection device detects the current inclined state of the lifting table and feeds the current inclined state back to the lifting table control unit, and as the movement of each table leg of the lifting table is controlled by an independent motor, the motor continues to work under the condition that the table top is inclined, the inclination of the table top is likely to be further increased, and even the motor is burnt; therefore, in this case, all the motors are controlled to stop working, and the levelness of the lifting table is readjusted until the detection information of the inclination detection device is in a horizontal state.

Referring to fig. 2, a schematic block diagram of a tilt detection apparatus is shown, the apparatus is fixedly connected to a plane to be detected, and at least includes a housing and at least a level tube fixedly connected to the housing, the level tube contains liquid and is provided with a bubble, and the position of the bubble is used for changing along with the tilt angle of the apparatus; the device is also internally provided with a sensor, and the sensor is used for detecting bubble position information so as to judge whether the device is in an inclined state and send result information to the lifting table control unit. Preferably, the sensor is an infrared sensor, a laser detector, or the like.

Referring to fig. 3 and 4, which are schematic diagrams illustrating a principle that the inclination detection device is implemented by using infrared sensors, the two ends of the leveling tube are respectively provided with the infrared sensors, the infrared sensors are used for sending infrared signals and receiving reflected signals, and when the device is in a horizontal state, the infrared signals emitted by the two infrared sensors are both on the liquid surface; when the device is in a tilted state, at least one infrared sensor emits an infrared signal at the surface of the bubble, wherein the reflected signals of the liquid surface and the bubble surface are significantly different.

Adopt the air level among the above-mentioned technical scheme, it has borrowed the principle of current spirit level. The mechanical level gauge in the prior art measures by means of a level tube, and the working principle of the mechanical level gauge is that when the level gauge inclines, air bubbles in the level tube move to the rising end of the level gauge, so that the position of a horizontal plane is determined. However, the existing mechanical level can only observe the horizontal state of the current plane by human eyes, and cannot be directly applied to the inclination control of the lifting table. In view of the above, the applicant creatively proposes that the infrared sensor is adopted to detect the position of the bubble, and the difference of the reflectivity of the liquid surface and the reflectivity of the bubble surface to the infrared signal is utilized, so that the received reflected signal is obviously different, and the inclination state of the current lifting table can be accurately judged.

In a preferred embodiment, the tilt detection device further comprises a detection unit, and the detection unit is connected with the infrared sensor and is used for acquiring the received reflected signal and judging the tilt state of the device according to the acquired reflected signal. The detection unit is also arranged in the shell, the inclination state is directly calculated through the detection unit, and the detection unit is connected with the rear-stage circuit through the standard digital interface, so that the difficulty of application and development is greatly reduced, and the universality is improved.

In a preferred embodiment, the infrared sensor is disposed in a sealed housing. The invention realizes detection by utilizing the difference of the reflectivity of the liquid surface and the bubble surface to the infrared signals, the working environments of the two infrared sensors in the closed shell are completely the same, and the influence of external environment illumination is small, thereby improving the accuracy of measurement.

In a preferred embodiment, the detection unit at least comprises a control module and an interface module, wherein the interface module is connected with the lifting table control unit and is used for sending result information calculated by the control module to the lifting table control unit, namely, a standard interface is adopted; meanwhile, the interface module is also provided with a power supply connecting wire which is used for being connected with an external power supply and supplying power to the control module and the infrared inductor.

In a preferred embodiment, the device is provided with two level tubes for detecting the inclination in the X-direction and the Y-direction, respectively.

In order to solve the technical problems in the prior art, the invention also provides a control method for placing the inclined lifting table, which comprises the following steps:

step S1: arranging at least one leveling tube, and reflecting the inclination condition of the detected plane through the position change of air bubbles in the leveling tube;

step S2: the method comprises the following steps of arranging infrared sensors to detect position changes of bubbles in a leveling pipe, wherein the infrared sensors are arranged at two ends of the leveling pipe respectively, when the leveling pipe is in a horizontal state, infrared signals emitted by the two infrared sensors are on the surface of a liquid, when the device is in an inclined state, the infrared signals emitted by at least one infrared sensor are on the surface of the bubbles, and the inclined state is obtained by utilizing the difference of the reflectivity of the surface of the liquid and the surface of the bubbles to the infrared signals;

step S3: and controlling the start and stop of the motor according to the inclination state acquired in the step S2 so as to enable the motor to continue to work when the desk is inclined.

In the technical scheme, the applicant creatively proposes that the infrared sensor is adopted to detect the position of the bubble, and the reflectivity of the liquid surface and the reflectivity of the bubble surface to the infrared signal are different, so that the received reflected signal is obviously different, the inclination state of the current lifting table can be accurately judged, and the working state of the lifting table is controlled according to the inclination state.

In a preferred embodiment, two level tubes are provided for detecting the tilt in the X-direction and Y-direction, respectively.

In a preferred embodiment, the level tube and the infrared sensor are arranged in a closed housing.

In a preferred embodiment, in step S2, the detection of the tilt state is implemented by using a comparison circuit, wherein the input end of the comparison circuit is the received reflection signal of the infrared sensor, that is, the difference between the reflection signals received by the two infrared sensors is used to determine whether the tilt state occurs, and the threshold of the comparator is set according to the difference between the reflection signals, so as to output whether the tilt state occurs, thereby further simplifying the circuit structure.

The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.