Mast control circuit and device

Abstract

A mast control circuit and device, wherein the mast control circuit uses a control circuit, a drive circuit and a motor, the control circuit receives a control signal and outputs a multi-level signal sequence according to the control signal, the drive circuit outputs a drive signal to the motor under the control of the multi-level sequence, and the motor controls the mast to move in a first direction or a second direction opposite to the first direction according to the drive signal, thereby achieving control of the mast to move in the first direction or the second direction opposite to the first direction according to the control signal, that is, achieving height control of the mast, making the height of the mast adjustable to adapt to various transportation and use environments, and solving the problem of traditional masts having an inconvenience caused by the non-adjustable height.

Description

Technical Field

[0001] The present application belongs to the field of offshore equipment control technology, and in particular relates to a mast control circuit and device. Background Art

[0002] On ships, yachts, and large cargo vessels, masts serve as crucial carriers for various mission equipment, including navigation radars, optoelectronic turrets, lidars, and other sensor equipment, as well as communication antennas. Traditional masts are typically fixed, and their height cannot be adjusted once established. When crossing bridges or caves, fixed masts often pose transportation and access obstacles due to their height, making them extremely inconvenient to use.

[0003] Therefore, the traditional mast has the problem that the height cannot be adjusted, which causes inconvenience in use. Summary of the Invention

[0004] The purpose of the present application is to provide a mast control circuit and device, aiming to solve the problem that the height of a traditional mast cannot be adjusted, resulting in inconvenience in use.

[0005] A first aspect of an embodiment of the present application provides a mast control circuit, comprising:

[0006] a control circuit configured to output a multi-level signal sequence according to the control signal when receiving the control signal;

[0007] a driving circuit connected to the control circuit, the driving circuit being configured to output a driving signal under the control of the multi-level signal sequence; and

[0008] A motor is connected to the drive circuit and the mast, and is used to control the mast to move in a first direction or a second direction opposite to the first direction according to the drive signal.

[0009] In one embodiment, the mast control circuit further comprises:

[0010] The driving signal includes a first driving signal and a second driving signal;

[0011] When the multi-level signal sequence is a first target sequence, the driving circuit outputs a first driving signal, and the motor controls the mast to move in a first direction according to the first driving signal;

[0012] When the multi-level signal sequence is a second target sequence, the driving circuit outputs a second driving signal, and the motor controls the mast to move in a second direction according to the second driving signal.

[0013] In one embodiment, the mast control circuit further comprises:

[0014] When the multi-level signal sequence is a third target sequence, the driving circuit outputs a hold signal to the motor, and the motor controls the mast to stop moving according to the hold signal.

[0015] In one embodiment, the mast control circuit also includes a fault alarm circuit, which is connected to the drive circuit. When the multi-level signal sequence is the fourth target sequence, the drive circuit outputs a fault alarm signal to the fault alarm circuit, and the fault alarm circuit issues an alarm and transmits the alarm information to the host computer.

[0016] In one embodiment, the drive circuit includes a DC solid-state relay, a first input terminal and a second input terminal of the DC solid-state relay are connected to the control circuit to access the multi-level signal sequence, and an output terminal of the DC solid-state relay is connected to the motor.

[0017] In one embodiment, the control circuit includes: a dual-way optocoupler isolation relay, wherein the input end of the dual-way optocoupler isolation relay is used to receive the control signal, and the first output end and the second output end of the dual-way optocoupler isolation relay are used to output the multi-level signal sequence.

[0018] In one embodiment, the mast control circuit also includes a first switch, the input end of the first switch is connected to the power supply, the first output end of the first switch and the second output end of the first switch are commonly connected to the input end of the dual-way optocoupler isolation relay, and the first switch is used to output the control signal.

[0019] In one embodiment, the mast control circuit further includes a limit protection circuit, which is connected to the control circuit. The limit protection circuit is used to control the control circuit to stop outputting the multi-level signal sequence when the mast reaches a first limited position in the first direction or a second limited position in the second direction.

[0020] In one embodiment, the position limiting protection circuit includes: a first sensor and a second sensor, wherein the first sensor is disposed at the first limited position, and the second sensor is disposed at the second limited position.

[0021] A second aspect of the embodiments of the present application provides a mast control device, comprising: a mast control circuit as described in the first aspect of the embodiments of the present application.

[0022] The above-mentioned mast control circuit adopts a control circuit, a drive circuit and a motor, wherein the control circuit receives a control signal and outputs a multi-level signal sequence according to the control signal, and the drive circuit outputs a drive signal to the motor under the control of the multi-level sequence. The motor controls the mast to move in a first direction or a second direction opposite to the first direction according to the drive signal, thereby realizing the control of the mast to move in a first direction or a second direction opposite to the first direction according to the control signal, that is, realizing the height control of the mast, making the height of the mast adjustable to adapt to various transportation and use environments, and solving the problem of the inconvenience caused by the non-adjustable height of the traditional mast. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A circuit diagram of a mast control circuit provided in one embodiment of the present application;

[0024] Figure 2 for Figure 1 Another circuit diagram of the mast control circuit shown;

[0025] Figure 3 for Figure 1 An example circuit schematic of a mast control circuit is shown. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0027] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0030] Figure 1 A circuit diagram of a mast control circuit 10 provided in accordance with the first aspect of an embodiment of the present application is shown. For ease of illustration, only portions related to this embodiment are shown, as detailed below:

[0031] The mast control circuit 10 in this embodiment includes: a control circuit 100, a drive circuit 200 and a motor 300. The output end of the control circuit 100 is connected to the input end of the drive circuit 200, and the output end of the drive circuit 200 is connected to the control end of the motor 300. The control circuit 100 is used to output a multi-level signal sequence according to the control signal when receiving the control signal; the drive circuit 200 is used to output a drive signal under the control of the multi-level signal sequence; and the motor 300 is used to control the mast 20 to move in a first direction or a second direction opposite to the first direction according to the drive signal.

[0032] It should be understood that the multi-level signal sequence in this embodiment is a sequence consisting of at least two level signals, and the level signals include two states: high and low. The high level state is represented by "1" and the low level state is represented by "0." For example, when the multi-level signal sequence is a sequence consisting of two level signals, the multi-level signal sequence may include four states: 00, 01, 10, and 11.

[0033] It should be understood that the drive signal can be a forward voltage signal or a reverse voltage signal. For example, when the drive signal is a forward voltage signal, the motor 300 rotates forward, thereby controlling the mast 20 to move in the first direction; when the drive signal is a reverse voltage signal, the motor 300 rotates reversely, thereby controlling the mast 20 to move in the second direction.

[0034] It should be understood that the mast is installed on the deck of marine transportation equipment such as ships and yachts. The first direction and the second direction can be directions perpendicular to the deck, or clockwise and counterclockwise directions. When the first direction and the second direction are directions perpendicular to the deck, the mast control circuit 10 is used to control the raising and lowering of the mast 20, wherein the first direction can be the ascending direction of the mast 20 and the second direction can be the descending direction of the mast 20. When the first direction and the second direction are clockwise and counterclockwise directions, the mast control circuit 10 is used to control the lowering of the mast 20, wherein the first direction can be the clockwise direction and the second direction can be the counterclockwise direction.

[0035] It should be understood that when the mast control circuit 10 is used to control the raising and lowering of the mast 20, the motor 300 is provided in an electric push rod, and the lower end of the mast 20 is connected to the electric push rod via a flange plate and corresponding mechanical devices. The raising and lowering of the electric push rod drives the raising and lowering of the mast 20. When the mast control circuit 10 is used to control the lowering of the mast 20, the motor 300 is provided in a hydraulic power unit, and the drive circuit 200 controls the forward and reverse rotation of the motor 300 to realize the gear pump of the hydraulic power unit, thereby controlling the lowering of the mast 20.

[0036] The mast control circuit 10 in this embodiment, by adopting the control circuit 100, the drive circuit 200 and the motor 300, realizes controlling the mast 20 to move in a first direction or a second direction opposite to the first direction according to the control signal, that is, realizing the control of the height or the inversion of the mast 20, so that the height and direction of the mast 20 can be adjusted to adapt to various transportation and use environments, and solves the problem that the height and direction of the traditional mast 20 cannot be adjusted, resulting in inconvenience in use.

[0037] Optionally, in one embodiment, the drive signal includes a first drive signal and a second drive signal; when the multi-level signal sequence is a first target sequence, the drive circuit 200 outputs the first drive signal, and the motor 300 controls the mast 20 to move in a first direction according to the first drive signal; when the multi-level signal sequence is a second target sequence, the drive circuit 200 outputs the second drive signal, and the motor 300 controls the mast 20 to move in a second direction according to the second drive signal.

[0038] The driving circuit 200 in this embodiment determines whether the multi-level signal sequence is a target sequence, thereby identifying the control information represented by the multi-level signal sequence and outputting a corresponding driving signal to control the forward and reverse rotation of the motor 300 .

[0039] Optionally, when the multi-level signal sequence is the third target sequence, the driving circuit 200 outputs a holding signal to the motor 300 , and the motor 300 controls the mast 20 to stop moving according to the holding signal.

[0040] When the motor 300 receives the hold signal, the motor 300 stops rotating, thereby controlling the mast 20 to stop moving. Optionally, when the mast 20 reaches the target position, the control circuit 100 outputs a multi-level signal sequence as a third target sequence according to the control signal indicating that the mast 20 stops moving.

[0041] The mast control circuit 10 in this embodiment controls the mast 20 to maintain its current state by outputting a multi-level signal sequence as a third target sequence, thereby achieving real-time control of the mast 20 and avoiding the situation where the mast 20 becomes uncontrollable after moving.

[0042] See also Figure 2 In one embodiment, the mast control circuit 10 further includes a fault alarm circuit 400, which is connected to the drive circuit 200. When the multi-level signal sequence is the fourth target sequence, the drive circuit 200 outputs a fault alarm signal to the fault alarm circuit 400, and the fault alarm circuit 400 issues an alarm and transmits the alarm information to the host computer.

[0043] The fault alarm circuit 400 may be composed of an indicator light and a buzzer. When the fault alarm circuit 400 receives a fault signal, the indicator light of the fault alarm circuit 400 lights up, a warning sound is emitted, and the alarm information is transmitted to a host computer, which is a control terminal such as a computer or cloud server. The mast control circuit 10 in this embodiment implements fault monitoring of the mast control circuit 10 by incorporating the fault alarm circuit 400.

[0044] See also Figure 3 In one embodiment, the driving circuit 200 includes a DC solid-state relay U2, wherein the first input terminal and the second input terminal of the DC solid-state relay U2 are connected to the control circuit 100 to access the multi-level signal sequence, and the output terminal of the DC solid-state relay U2 is connected to the motor 300.

[0045] It should be understood that the first input terminal and the second input terminal of the DC solid-state relay U2 are respectively connected to two level signals in the multi-level signal sequence, wherein the first input terminal of the DC solid-state relay U2 is connected to the first level signal of the multi-level signal sequence, and the second input terminal of the DC solid-state relay U2 is connected to the second level signal of the multi-level signal sequence. For example, when the multi-level signal sequence is "01", the first input terminal of the DC solid-state relay U2 is connected to the low level "0", and the second input terminal of the DC solid-state relay U2 is connected to the high level "1".

[0046] It should be understood that when the first input terminal of the DC solid-state relay U2 is connected to a high level and when the second input terminal of the solid-state relay U2 is connected to a low level, the drive signal output by the DC solid-state relay U2 is a positive voltage signal. At this time, the motor 300 rotates forward to control the mast 20 to move in the first direction; when the first input terminal of the DC solid-state relay U2 is connected to a low level and when the second input terminal of the solid-state relay U2 is connected to a high level, the drive signal output by the DC solid-state relay U2 is a reverse voltage signal. At this time, the motor 300 reverses to control the mast 20 to move in the second direction; when the DC solid-state relay U2 is connected to a low level and when the second input terminal of the solid-state relay U2 is connected to a high level, the drive signal output by the DC solid-state relay U2 is a reverse voltage signal. At this time, the motor 300 reverses to control the mast 20 to move in the second direction; When the first input terminal of the DC solid-state relay U2 is connected to a low level, when the second input terminal of the solid-state relay U2 is connected to a low level, the DC solid-state relay U2 outputs a holding signal of zero voltage, and at this time the motor 300 stops rotating to control the mast 20 to stop moving; when the first input terminal of the DC solid-state relay U2 is connected to a high level, when the second input terminal of the solid-state relay U2 is connected to a high level, the DC solid-state relay U2 does not operate and outputs a fault alarm signal; that is, the first target sequence in this embodiment is "10", the second target sequence is "01", the third target sequence is "00", and the fourth target sequence is "11".

[0047] The driving circuit 200 in this embodiment uses a DC solid-state relay U2 to generate a driving signal according to a multi-level signal sequence to control the motor 300. The circuit is simple and easy to operate.

[0048] See also Figure 3 In one embodiment, the control circuit 100 includes: a dual-channel optocoupler isolation relay U1, wherein the input terminals COM1 and COM2 of the dual-channel optocoupler isolation relay U1 are used to receive control signals, and the first output terminal and the second output terminal of the dual-channel optocoupler isolation relay U1 are used to output a multi-level signal sequence.

[0049] It should be understood that the level signal output by the first output terminal of the dual-way optocoupler isolation relay U1 and the level signal output by the second output terminal constitute a multi-level signal sequence. For example, when the level signal output by the first output terminal of the dual-way optocoupler isolation relay U1 is a low level "0", and when the level signal output by the second output terminal of the dual-way optocoupler isolation relay U1 is a high level "1", the multi-level signal sequence is "01".

[0050] It should be understood that the dual-channel optocoupler isolation relay U1 includes two input terminals, namely the first input terminal COM1 corresponding to the first output terminal NC1, and the second input terminal COM2 corresponding to the second output terminal NC2. When the first input terminal COM1 inputs a high level, the first output terminal NC1 outputs a high level. When the second input terminal COM2 inputs a high level, the second output terminal NC2 outputs a high level.

[0051] The control circuit 100 in this embodiment uses a dual-path optocoupler isolation relay U1 to output a corresponding multi-level signal sequence according to the control signal, and the circuit is simple.

[0052] Optional, see Figure 3 In one embodiment, the mast control circuit 10 further includes a first switch 500, an input end of the first switch 500 is connected to a power supply, a first output end of the first switch 500 and a second output end of the first switch 500 are commonly connected to an input end of a dual-path optocoupler isolation relay U1, and the first switch 500 is used to output a control signal, that is, the dual-path optocoupler isolation relay U1 is used to output a multi-level signal sequence according to the on-off state of the first switch 500.

[0053] It should be understood that the first switch 500 can be a single-pole double-throw switch, a multiplexer, etc. The first switch 500 is provided with a waterproof layer to prevent failure due to the humid environment at sea. Optionally, the first switch 500 can be provided on the bridge.

[0054] The mast control circuit 10 in this embodiment generates a control signal by adding a first switch 500, thereby realizing manual control of the mast 20. The staff can independently control the movement of the mast 20 at any time according to needs, thereby making the control of the mast 20 more flexible.

[0055] In one embodiment, the mast control circuit 10 also includes a controller, a first output end of the controller is connected to the first input end COM1 of the dual-way optocoupler isolation relay U1, and a second output end of the controller is connected to the second input end COM2 of the dual-way optocoupler isolation relay U1, and the dual-way optocoupler isolation relay U1 is used to output a multi-level signal sequence according to the level signal of the controller.

[0056] It should be understood that the controller may be a microprocessor, such as a single chip microcomputer, etc., the controller may also be a mobile terminal such as a computer, or the controller may also be a computer program.

[0057] Optionally, the controller outputs corresponding control signals at specific time points to control the movement of the mast 20 based on the operating path of the marine transport equipment on which the mast 20 is located. The controller may also output control signals to control the movement of the mast 20 based on environmental information collected by the marine transport equipment. For example, if the controller determines that there is a bridge ahead of the mast 20 based on preset path information or environmental information, the controller outputs a control signal to control the mast 20 to descend so that the mast 20 can pass through the bridge.

[0058] The mast control circuit 10 in this embodiment realizes automated control of the movement of the mast 20 by adding a controller, that is, the mast control circuit 10 can realize control of the mast 20 in unmanned mode, avoiding the situation where the mast 20 is not adjusted in time due to negligence of personnel, resulting in malfunction in use. Compared with today's fixed masts, it is more convenient during transportation and navigation, and the position of the mast can be adjusted at any time to meet the needs of different occasions.

[0059] See also Figure 3 In one embodiment, the mast control circuit 10 further includes a limit protection circuit 600 connected to the control circuit 100. The limit protection circuit 600 is configured to control the control circuit 100 to stop outputting the multi-level signal sequence when the mast 20 reaches a first limited position in the first direction or a second limited position in the second direction.

[0060] It should be understood that the first limited position and the second limited position are the farthest distances that the mast 20 can reach in that direction. The limit protection circuit 600 can be composed of sensors, card components, etc. Optionally, the limit protection circuit 600 is connected to the control end of the control circuit 100; for example, when the control circuit 100 includes a dual-channel optocoupler isolation relay U1, the limit protection circuit 600 is connected to the control ends IN1 and IN2 of the dual-channel optocoupler isolation relay U1.

[0061] The mast control circuit 10 in this embodiment, by adding a limit protection circuit 600, allows the mast 20 to stop at any position between the highest position and the lowest position. When rising to the highest position and falling to the lowest position, the mast 20 will automatically stop rising and falling, thereby realizing the control of the highest and lowest positions of the mast 20, avoiding the situation where the mast 20 is damaged or unusable due to the mast 20 being too high or too low, and there is no need to manually judge whether the mast has reached the first limit position and the second limit position, thereby greatly reducing labor costs.

[0062] In one embodiment, the position limiting protection circuit 600 includes: a first sensor and a second sensor, wherein the first sensor is disposed at a first limited position, and the second sensor is disposed at a second limited position.

[0063] It should be understood that the first sensor and the second sensor may be magnetic sensors, infrared sensors, etc. When the mast 20 reaches the first defined position, the first sensor outputs an electrical signal to the control circuit 100. Under the control of the electrical signal, the control circuit 100 stops outputting the multi-level signal sequence or outputs a hold signal to the drive circuit 200, thereby controlling the mast 20 to stop moving. When the mast 20 reaches the second defined position, the second sensor outputs an electrical signal to the control circuit 100. Under the control of the electrical signal, the control circuit 100 stops outputting the multi-level signal sequence or outputs a hold signal to the drive circuit 200, thereby controlling the mast 20 to stop moving.

[0064] The first sensor and the second sensor in this embodiment are used to limit the mast 20 to prevent the mast 20 from maintaining the corresponding movement when rising to the highest position or falling to the lowest position, causing the motor 300 to overheat or the internal gears to wear, and ultimately damaging the motor 300.

[0065] Combine Figure 3 , a working process of the mast control circuit is briefly described as follows:

[0066] 1. When the first switch 500 is closed upward (i.e., the input terminal and the first output terminal of the first switch 500 are connected) and connected to the first input terminal COM1 of the dual-way optocoupler isolation relay U1, the first output terminal NC1 of the dual-way optocoupler isolation relay U1 outputs a high level, and the second output terminal NC2 of the dual-way optocoupler isolation relay U1 outputs a low level (i.e., the dual-way optocoupler isolation relay U1 outputs a multi-level signal sequence of "10"), then the A path of the DC solid-state relay U2 is turned on, outputting a positive voltage signal to the motor 300 of the electric push rod, and controlling the motor 300 to rotate forward, and the mast 20 begins to slowly rise;

[0067] 2. While the mast 20 is rising, turn the first switch 500 back to the middle position. At this time, the mast 20 stops rising and remains in this position.

[0068] 3. Close the first switch 500 upward again, and the mast 20 continues to rise. When the mast 20 rises to the highest position, the first sensor of the limit protection circuit 600 detects the magnetic device fixed to the highest lifting position of the mast 20. At this time, the internal indicator light of the first sensor lights up, and the first sensor sends a high-level signal to the first control terminal IN1 of the dual-way optocoupler isolation relay U1. The dual-way optocoupler isolation relay U1 receives the high level and is triggered. The internal relay is energized, and the first output terminal NC1 is disconnected from the first input terminal COM1. At this time, the DC solid-state relay U2 has no input and will stop working. The corresponding electric push rod control motor 300 also stops working, and the mast 20 stops rising.

[0069] 4. When the first switch 500 is closed downward (i.e., the input and second output ends of the first switch 500 are connected) and connected to the second input end COM2 of the dual-way optocoupler isolation relay U1, the second output end NC2 of the dual-way optocoupler isolation relay U1 outputs a high level. At this time, the solid-state relay B is valid and outputs a negative voltage signal to the motor 300 of the electric push rod, controlling the motor 300 to reverse, and the mast 20 begins to slowly descend. When the mast 20 descends to the lowest position, the second sensor detects the magnetic device fixed to the lowest lifting position of the mast 20. At this time, the internal indicator light of the second sensor lights up, and at the same time, the second sensor sends a high-level signal to the second control end IN2 of the dual-way optocoupler isolation relay U1. The dual-way optocoupler isolation relay U1 receives the high level and is triggered, the internal relay is energized, and the second output end NC2 is disconnected from the second input end COM2. At this time, the DC solid-state relay U2 has no input and will stop working. The corresponding electric push rod control motor 300 also stops working, and the mast 20 stops descending.

[0070] A second aspect of the embodiments of the present application provides a mast control device, comprising: the mast control circuit as described in the first aspect of the embodiments of the present application.

[0071] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A mast control circuit, characterized in that: include: A control circuit configured to output a multi-level signal sequence according to a control signal when receiving the control signal; the control circuit comprising a dual-channel optocoupler isolation relay, wherein an input end of the dual-channel optocoupler isolation relay is configured to receive the control signal, and a first output end and a second output end of the dual-channel optocoupler isolation relay are configured to output the multi-level signal sequence; a driving circuit connected to the control circuit, the driving circuit being configured to output a driving signal under the control of the multi-level signal sequence; as well as a motor connected to the drive circuit and the mast, the motor being configured to control the mast to move in a first direction or a second direction opposite to the first direction according to the drive signal; a limit protection circuit, the limit protection circuit being connected to the control end of the dual-path optocoupler isolation relay, the limit protection circuit being configured to control the control circuit to stop outputting the multi-level signal sequence when the mast reaches a first limited position in the first direction or a second limited position in the second direction; The driving circuit includes a DC solid-state relay, a first input terminal and a second input terminal of the DC solid-state relay are connected to the control circuit to access the multi-level signal sequence, and an output terminal of the DC solid-state relay is connected to the motor.

2. The mast control circuit according to claim 1, characterized in that: Also includes: The driving signal includes a first driving signal and a second driving signal; When the multi-level signal sequence is a first target sequence, the driving circuit outputs a first driving signal, and the motor controls the mast to move in a first direction according to the first driving signal; When the multi-level signal sequence is a second target sequence, the driving circuit outputs a second driving signal, and the motor controls the mast to move in a second direction according to the second driving signal.

3. The mast control circuit according to claim 2, characterized in that: Also includes: When the multi-level signal sequence is a third target sequence, the driving circuit outputs a hold signal to the motor, and the motor controls the mast to stop moving according to the hold signal.

4. The mast control circuit according to claim 3, characterized in that: It also includes a fault alarm circuit, which is connected to the drive circuit. When the multi-level signal sequence is the fourth target sequence, the drive circuit outputs a fault alarm signal to the fault alarm circuit, and the fault alarm circuit issues an alarm and transmits the alarm information to the host computer.

5. The mast control circuit according to claim 1, wherein: It also includes a first switch, the input end of the first switch is connected to the power supply, the first output end of the first switch and the second output end of the first switch are commonly connected to the input end of the dual-channel optocoupler isolation relay, and the first switch is used to output the control signal.

6. The mast control circuit according to any one of claims 1 to 5, characterized in that: The position limiting protection circuit includes: a first sensor and a second sensor, wherein the first sensor is arranged at the first limited position, and the second sensor is arranged at the second limited position.

7. A mast control device, characterized in that: include: The mast control circuit according to any one of claims 1 to 6.

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