CN212850805U - Brake control system and ship video monitoring camera equipment - Google Patents
Brake control system and ship video monitoring camera equipment Download PDFInfo
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- CN212850805U CN212850805U CN202021925718.9U CN202021925718U CN212850805U CN 212850805 U CN212850805 U CN 212850805U CN 202021925718 U CN202021925718 U CN 202021925718U CN 212850805 U CN212850805 U CN 212850805U
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Abstract
The application relates to a brake control system and a ship video monitoring camera device. The system mainly comprises: a camera tripod head main board; the brake driving circuit is connected with the camera holder main board; the brake device is connected with the brake driving circuit; the camera cloud deck mainboard drives a brake device to perform loosening or locking actions through a brake driving circuit; the motor is connected with the camera holder main board; the camera pan-tilt main board controls a motor to drive a camera pan-tilt to move or lock the position of the camera pan-tilt; the brake device is used for loosening or locking a rotating shaft of the motor. Under the static condition of cloud platform, this application directly adopts camera cloud platform mainboard to lock the motor shaft of camera cloud platform through brake drive circuit control brake equipment to the position of locking camera cloud platform has solved the problem that the product reliability is low and camera cloud platform position easily produces the skew because of the influence of external forces such as ship shake vibrations.
Description
Technical Field
The application relates to the technical field of camera pan-tilt control, in particular to a brake control system and a ship video monitoring camera device.
Background
In early ship camera systems, the camera pan head utilized a stepper motor to maintain torque to reduce pan head position offset caused by ship shake shock. Modern ship camera systems have raised higher and higher requirements for image stability, especially have appeared in the intelligent camera that possesses face identification, regional invasion and detect the function, have raised higher requirements for cloud platform stable system, rely on step motor to keep the torque to control cloud platform offset and have been unable to satisfy application demand.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the existing control system of the tripod head of the ship camera has the problems of low product reliability and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a brake control system and a video surveillance camera device for a ship.
In order to achieve the above object, in one aspect, an embodiment of the present invention provides a brake control system, including:
a camera tripod head main board;
the brake driving circuit is connected with the camera holder main board;
the brake device is connected with the brake driving circuit; the camera cloud deck main board drives the brake device to execute corresponding actions through the brake driving circuit;
the motor is connected with the camera holder main board; the camera pan-tilt main board controls a motor to drive a camera pan-tilt to move or lock the position of the camera pan-tilt; wherein, brake equipment is used for restricting the action of motor.
In one embodiment, the brake driving circuit includes:
the switch device is connected with the brake device;
and one end of the current-limiting resistor is connected with the switch device, and the other end of the current-limiting resistor is connected with the camera holder main board.
In one embodiment, the camera pan-tilt main board is an MCU;
the control end of the MCU is connected with the other end of the current-limiting resistor;
and the driving signal output end of the MCU is connected with the motor.
In one embodiment, the switching device is a transistor.
In one embodiment, the transistor is a unipolar transistor.
In one embodiment, the switching device is a MOS transistor.
In one embodiment, the MOS transistor is an NMOS transistor;
the drain electrode of the NMOS tube is used for connecting a brake device;
the grid of the NMOS tube is connected with one end of the current-limiting resistor;
the source electrode of the NMOS tube is used for grounding.
In one embodiment, the brake driving circuit further comprises a pull-down resistor;
one end of the pull-down resistor is respectively connected with one end of the current-limiting resistor and the grid of the NMOS tube, and the other end of the pull-down resistor is grounded.
In one embodiment, the motor is a stepper motor; the braking device acts on the rotating shaft of the stepping motor to limit the action of the stepping motor.
A video surveillance camera apparatus for a ship, comprising: locate the brake control system as above in the casing.
One of the above technical solutions has the following advantages and beneficial effects:
the camera tripod head mainboard is adopted to control the motor of the camera tripod head to operate, and the brake driving circuit controls the brake device to loosen or lock the rotating shaft of the motor, so that under the condition that the position of the camera tripod head is locked, the position deviation of the tripod head caused by the influence of external force such as shaking and vibration of a ship in a static state of the tripod head is avoided, the position locking of the camera tripod head is doubly guaranteed, and the problems that the position of the camera tripod head of the conventional ship camera system is easy to deviate and the product reliability is low are solved. The brake control system is simple in structure, reduces complexity of the camera brake control system, improves reliability of products, guarantees stability of the camera brake system, and further improves collection effect of a camera pan-tilt to images and videos.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a first block diagram of a brake control system according to one embodiment;
FIG. 2 is a second block diagram illustrating a brake control system according to an exemplary embodiment;
FIG. 3 is a third block diagram illustrating a brake control system according to an exemplary embodiment;
fig. 4 is a block diagram of a video surveillance camera device for a ship in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In traditional naval vessel camera system, because cloud platform brake technology lacks, cloud platform driving motor does not use brake equipment, but utilizes step motor to keep the torque to reduce the cloud platform offset that the naval vessel rocks the vibrations and cause, along with modern naval vessel camera system to the requirement that image stability proposed is higher and higher, relies on step motor to keep the torque to control cloud platform offset and has can't satisfy the application demand.
With the development of the control technology of the tripod head of the ship camera, a tripod head control system with a brake is provided, and the rotating shaft of the tripod head stepping motor is locked and released to be controlled by using a special brake device and a matched brake control component, so that the position of the tripod head is locked. However, since the stepping motor, the brake device and the brake controller are special supporting components and are expensive, and meanwhile, the brake controller needs to be driven by an independent brake control panel, the system architecture is complex, the reliability of the product is reduced, the electromagnetic compatibility index of the product is also reduced by an MCU (micro controller Unit) module of the brake control panel, and the ship video system has strict requirements on the reliability and the electromagnetic compatibility index of the camera product, so that the traditional cradle head control system with the brake cannot meet the modern application requirements.
In one embodiment, as shown in fig. 1, there is provided a brake control system, which may include:
a camera tripod head main board;
the brake driving circuit is connected with the camera holder main board;
the brake device is connected with the brake driving circuit; the camera cloud deck main board drives the brake device to execute corresponding actions through the brake driving circuit;
the motor is connected with the camera holder main board; the camera pan-tilt main board controls a motor to drive a camera pan-tilt to move or lock the position of the camera pan-tilt; wherein, brake equipment is used for restricting the action of motor.
Specifically, the brake device is also used for connecting a brake power supply, and the brake power supply supplies power to the brake device. When the camera pan-tilt is started, the camera pan-tilt main board sends a brake release instruction to the brake driving circuit, and the brake driving circuit controls the brake device to release the motor rotating shaft when receiving the brake release instruction; meanwhile, the camera pan-tilt main board controls the motor to start to operate, and the operation of the motor can drive the camera pan-tilt to rotate, so that the position of the camera pan-tilt is adjusted. At this time, the camera pan-tilt can rotate and adjust the position.
When the camera pan-tilt stops, in order to prevent the position of the camera pan-tilt from shifting due to external force factors such as shaking and vibration of a ship, the position of the camera pan-tilt needs to be locked; at this moment, the camera cloud platform mainboard control motor of this application stops the operation, and camera cloud platform mainboard sends brake command to brake control circuit simultaneously, and brake control circuit is when receiving the brake command, and brake control circuit control brake equipment locks the pivot of motor, because the brake resistance is very big, and the pivot of motor can not rotate, and the position of camera cloud platform at this moment is firmly locked, and the vibrations of rocking of naval vessel can not lead to the skew of camera cloud platform position yet.
The application discloses brake control system adopts the motor operation of camera cloud platform mainboard control camera cloud platform, thereby drive the camera cloud platform and rotate and the position adjustment, and when camera cloud platform position needs locking, then camera cloud platform mainboard passes through control motor stall, and the motor shaft of camera cloud platform is locked to brake drive circuit control brake equipment through sending the brake instruction, thereby reached the dual guarantee to camera cloud platform position locking, prevent to avoid the camera cloud platform because the ship rocks the cradle head offset that external force influences such as vibrations caused under static state, and then improve the image, the video collection effect.
In a specific embodiment, the brake driving circuit may include:
the switch device is connected with the brake device;
and one end of the current-limiting resistor is connected with the switch device, and the other end of the current-limiting resistor is connected with the camera holder main board.
The switch device is used for controlling the on-off of the brake driving circuit, and the current-limiting resistor is connected in series in the circuit and used for limiting the magnitude of the current of the branch circuit where the current is located so as to prevent the current from being too large and burning out the components connected in series, thereby protecting the circuit.
Specifically, when the camera pan-tilt is started, the camera pan-tilt main board sends a brake release instruction to the switch device, the switch device is switched on when receiving the brake release instruction, the brake device is switched on to release the rotating shaft of the camera pan-tilt motor, meanwhile, the camera pan-tilt main board controls the camera pan-tilt motor to start to operate, and the rotating shaft of the motor drives the camera pan-tilt to rotate so as to adjust the position of the camera pan-tilt.
When the camera pan-tilt stops, the camera pan-tilt main board controls the motor to stop running; meanwhile, the camera pan-tilt mainboard sends a brake instruction to the switch device, the switch device is disconnected after receiving the brake instruction, the motor rotating shaft of the camera pan-tilt is locked after the brake device is powered off, the resistance of the brake is very large, the motor rotating shaft of the camera pan-tilt does not rotate any more, the position of the camera pan-tilt is locked at the moment, and the stability of the camera pan-tilt system is ensured.
In a specific embodiment, as shown in fig. 2, the main board of the camera platform may be an MCU;
the control end of the MCU is connected with the other end of the current-limiting resistor;
and the driving signal output end of the MCU is connected with the motor.
In one embodiment, the motor may be a stepper motor; the braking device acts on the rotating shaft of the stepping motor to limit the action of the stepping motor.
Specifically, when the camera pan-tilt is started, the MCU sends a brake release instruction to the switch device through the control end of the MCU, the switch device is conducted when receiving the brake release instruction, then the brake device is conducted and the rotating shaft of the camera pan-tilt stepping motor is released, meanwhile, the driving signal output end of the MCU outputs motor operation pulses to the stepping motor of the camera pan-tilt, the stepping motor starts to operate, and the rotating shaft of the stepping motor can drive the camera pan-tilt to rotate so as to adjust the position of the camera pan-tilt.
When the camera pan-tilt stops, the driving signal output end of the MCU stops outputting motor operation pulses to the stepping motor of the camera pan-tilt, and then the stepping motor stops running; meanwhile, a control end of the MCU outputs a brake instruction to the switch device, the switch device is disconnected after receiving the brake instruction, and a rotating shaft of the camera pan-tilt stepping motor is locked after the brake device is powered off, so that the position of the camera pan-tilt is firmly locked, and the problem of pan-tilt position deviation caused by shaking and vibration of a ship after the camera pan-tilt stops is solved.
More than, this application is through the running state of the step motor of camera cloud platform of the motor running pulse control camera cloud platform of camera cloud platform control mainboard MCU drive signal output end output, and directly utilize the brake instruction of camera cloud platform mainboard MCU's control end output, through switching device control brake equipment locking camera cloud platform step motor's pivot, realize the brake effect of camera cloud platform, the problem of the cloud platform offset that camera cloud platform easily caused because of external force influences such as ship rocks vibrations, the locking of the position of camera cloud platform has been ensured, and the brake control system framework of this application is simple, the reliability of the product is improved, the stability of camera brake control system has been guaranteed.
In one embodiment, there is provided a brake control system, which may include:
the camera cloud deck comprises a camera cloud deck main board, a brake driving circuit, a brake device and a motor; the brake driving circuit is connected with the camera cloud platform main board, the brake device is connected with the brake driving circuit and is also used for being connected with a brake power supply, and the motor is connected with the camera cloud platform main board; the camera cloud deck main board drives the brake device to execute corresponding loosening or locking actions through the brake driving circuit; the camera pan-tilt main board controls a motor to drive a camera pan-tilt to move or lock the position of the camera pan-tilt; wherein, brake equipment is used for restricting the action of motor.
The motor can be a stepping motor, and the brake device acts on a rotating shaft of the stepping motor to limit the action of the stepping motor; the brake driving circuit may include: the switch device is connected with the brake device, one end of the current-limiting resistor is connected with the switch device, and the other end of the current-limiting resistor is connected with the camera holder main board; the camera cloud platform main board can be an MCU, the control end of the MCU is connected with the other end of the current limiting resistor, and the driving signal output end of the MCU is connected with the motor; the switching device may be a transistor.
In a particular embodiment, the transistor may be a unipolar transistor.
Specifically, when the camera pan-tilt is started, the MCU sends a brake release instruction to the unipolar transistor through the control end of the MCU, the unipolar transistor is conducted when receiving the brake release instruction, the brake device is electrified to conduct and release the rotating shaft of the camera pan-tilt stepping motor, meanwhile, the driving signal output end of the MCU outputs motor operation pulses to the stepping motor of the camera pan-tilt, the stepping motor starts to operate, and the rotating shaft of the stepping motor can drive the camera pan-tilt to rotate so as to adjust the position of the camera pan-tilt.
When the camera pan-tilt stops, the driving signal output end of the MCU stops outputting motor operation pulses to the stepping motor of the camera pan-tilt, and then the stepping motor stops running; meanwhile, the control end of the MCU outputs a brake instruction to the unipolar transistor, the unipolar transistor is disconnected after receiving the brake instruction, and the rotating shaft of the camera pan-tilt stepping motor is locked after the brake device is powered off, so that the position of the camera pan-tilt is firmly locked.
The brake drive circuit of this application adopts a simple monopole transistor, directly uses camera cloud platform mainboard output brake instruction to pass through monopole transistor control brake equipment's action, the brake control system simple structure of this application, and system stability is high, and product reliability is strong to can effectively avoid the problem of camera cloud platform offset that vibrations caused of rocking of naval vessel.
In one embodiment, the switching device may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOS), which is a type of unipolar Transistor.
In a specific embodiment, as shown in fig. 3, the MOS transistor may be an NMOS (Negative channel-Metal-Oxide-Semiconductor) transistor;
the drain electrode of the NMOS tube is used for connecting a brake device;
the grid of the NMOS tube is connected with one end of the current-limiting resistor;
the source electrode of the NMOS tube is used for grounding.
The NMOS transistor is formed by manufacturing two N + (Negative) regions (N + regions are provided with a large number of electron sources for providing free electrons for current flow) with high doping concentration on a P (Positive) type silicon substrate (providing a large number of movable holes) with low doping concentration, and leading out two electrodes by using metal aluminum, wherein the two electrodes are respectively used as a drain electrode D (Drain) and a source electrode S (Source). Then, a thin insulating layer of silicon dioxide (SiO2) is applied to the semiconductor surface, and an aluminum electrode (usually polysilicon) is applied to the insulating layer between the drain and source electrodes as the gate g (gate). An electrode B (base) is also led out from the substrate, and an N-channel enhancement type MOS tube is formed. The NMOS transistor can be used as a high-speed power switch, is characterized in that the NMOS transistor is conducted when the voltage between a grid electrode and a source electrode is larger than a certain value, is suitable for the condition (low-side driving) when the source electrode is grounded, and can be used when the grid electrode voltage is larger than the voltage between the grid electrode and the source electrode given in a parameter manual, the drain electrode D is connected with a power supply, and the source electrode S is grounded. It should be noted that the gate-source voltage refers to the voltage difference between the gate G and the source S, so when the NMOS is driven as a high side, when the drain D and the source S are turned on, the drain D and the source S have the same potential, and the gate G must be higher than the source S and the drain D, so that the drain D and the source S can continue to be turned on. According to the power of the brake device, NMOS tubes with different powers can be selected for adaptation.
Specifically, when the camera pan-tilt is started, the MCU sends a brake release instruction to the grid electrode of the NMOS pipe through the control end of the MCU, the NMOS pipe is conducted when receiving the brake release instruction, the brake device is electrified to conduct a rotating shaft of a stepping motor for releasing the camera pan-tilt, meanwhile, the driving signal output end of the MCU outputs a motor operation pulse to the stepping motor of the camera pan-tilt, the stepping motor starts to operate, and the rotating shaft of the stepping motor can drive the camera pan-tilt to rotate so as to adjust the position of the camera pan-tilt.
When the camera pan-tilt stops, the driving signal output end of the MCU stops outputting motor operation pulses to the stepping motor of the camera pan-tilt, and then the stepping motor stops running; meanwhile, the control end of the MCU outputs a brake instruction to the grid electrode of the NMOS pipe, the NMOS pipe is disconnected after receiving the brake instruction, and the rotating shaft of the camera pan-tilt stepping motor is locked after the brake device is powered off, so that the position of the camera pan-tilt is firmly locked.
This application is through the on-off control to the NMOS pipe, and then control brake equipment carries out corresponding locking or unclamps the action, when MCU control camera cloud platform step motor stall, also utilize NMOS pipe control brake equipment to the locking of step motor pivot, thereby the locking of camera cloud platform position has obtained dual guarantee, can effectively avoid shaking the cloud platform offset problem that external force factors such as vibrations lead to because of the naval vessel, and the brake drive circuit of the brake control system of this application adopts a simple NMOS pipe, the index such as reliability and electromagnetic compatibility of product has been improved.
In a specific embodiment, as shown in fig. 3, the brake driving circuit may further include a pull-down resistor;
one end of the pull-down resistor is respectively connected with one end of the current-limiting resistor and the grid of the NMOS tube, and the other end of the pull-down resistor is grounded.
The pull-down resistor can ensure that the source electrode of the NMOS tube is in a low level state, so that the brake device can normally work when the NMOS tube is conducted; the brake driving Circuit formed by the NMOS tube, the current-limiting resistor and the pull-down resistor can be integrated on a PCB (Printed Circuit Board), the PCB occupies a small space, and the miniaturized design of the camera is facilitated.
In the above way, the brake control system directly uses the camera pan-tilt main board to output the brake instruction and the brake release instruction to control the on-off of the NMOS tube, so as to control the on-off of the circuit of the brake device, and the brake device can lock or release the rotating shaft of the camera pan-tilt stepping motor; when the MCU controls the stepping motor to stop running, the NMOS tube is also controlled to be switched on, so that the braking device locks the stepping motor, the position of the camera pan-tilt can be firmly locked, double guarantee is provided for the position locking of the camera pan-tilt, the problem of pan-tilt position deviation caused by external force factors such as shaking and shaking of the pan-tilt in the conventional ship braking system is avoided, and a good braking effect is achieved.
The structure of the brake control system is greatly simplified, the brake driving circuit is simple in structure, a core device is an NMOS tube, the cost is low, the production is easy, the complexity of the brake control system of the camera is reduced, the indexes such as product reliability and electromagnetic compatibility are improved, the brake driving circuit is integrated on a PCB, the occupied space is small, the miniaturization design of the camera is favorably realized, the tripod head brake control system is very suitable for being provided with functions such as face recognition and regional intrusion detection, the camera product system is complex and high in development cost, and the tripod head brake control system of the intelligent camera has strict requirements on the reliability and electromagnetic compatibility indexes of the camera product.
In one embodiment, as shown in fig. 4, there is provided a video surveillance camera device for a ship, which may include: locate the brake control system as above in the casing.
Specifically, the video monitoring camera equipment for the ships has the function of detecting regional invaders, and can be used for monitoring the designated region on the ships. When an invader appears in the monitoring area, the MCU of the brake control system sends a brake release instruction to the grid electrode of the NMOS pipe through the control end of the MCU, the NMOS pipe is conducted when receiving the brake release instruction, the brake device is electrified to conduct and release the rotating shaft of the camera pan-tilt stepping motor, meanwhile, the driving signal output end of the MCU outputs motor operation pulse to the stepping motor of the camera pan-tilt, the stepping motor starts to operate, and the rotating shaft of the stepping motor can drive the camera pan-tilt to rotate so as to adjust the position of the camera pan-tilt.
When the camera is positioned to an invader in the lens area, the driving signal output end of the MCU stops outputting motor running pulses to the stepping motor of the camera pan-tilt, so that the stepping motor stops running, and the position of the camera pan-tilt is not adjusted any more; meanwhile, a control end of the MCU outputs a brake instruction to a grid electrode of the NMOS pipe, the NMOS pipe is disconnected after receiving the brake instruction, and a rotating shaft of the camera pan-tilt stepping motor is locked after the brake device is powered off, so that the position of the camera pan-tilt is firmly locked, and the camera pan-tilt position can not be deviated even if a ship shakes and shakes, so that images and videos with excellent effects can be acquired.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A brake control system, comprising:
a camera tripod head main board;
the brake driving circuit is connected with the camera holder main board;
the brake device is connected with the brake driving circuit; the camera cloud deck main board drives the brake device to execute corresponding actions through the brake driving circuit;
the motor is connected with the camera holder main board; the camera pan-tilt main board controls the motor to drive the camera pan-tilt to move or lock the position of the camera pan-tilt; wherein, brake equipment is used for restricting the action of motor.
2. The brake control system of claim 1, wherein the brake actuation circuit comprises:
the switch device is connected with the brake device;
and one end of the current-limiting resistor is connected with the switching device, and the other end of the current-limiting resistor is connected with the camera holder main board.
3. The brake control system according to claim 2, wherein the camera pan-tilt main board is an MCU;
the control end of the MCU is connected with the other end of the current-limiting resistor;
and the driving signal output end of the MCU is connected with the motor.
4. A brake control system according to claim 2 or 3, wherein the switching means is a transistor.
5. The brake control system of claim 4, wherein the transistor is a unipolar transistor.
6. A brake control system according to claim 2 or claim 3, wherein the switching means is a MOS transistor.
7. The brake control system according to claim 6, wherein the MOS transistor is an NMOS transistor;
the drain electrode of the NMOS tube is used for being connected with the brake device;
the grid electrode of the NMOS tube is connected with one end of the current-limiting resistor;
and the source electrode of the NMOS tube is grounded.
8. The brake control system of claim 7, wherein the brake actuation circuit further comprises a pull-down resistor;
one end of the pull-down resistor is connected with one end of the current-limiting resistor and the grid electrode of the NMOS tube respectively, and the other end of the pull-down resistor is grounded.
9. The brake control system according to any one of claims 1 to 3, wherein the motor is a stepping motor; the braking device acts on the rotating shaft of the stepping motor to limit the action of the stepping motor.
10. A video surveillance camera apparatus for a ship, comprising: the brake control system of claim 9 disposed within the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021925718.9U CN212850805U (en) | 2020-09-04 | 2020-09-04 | Brake control system and ship video monitoring camera equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021925718.9U CN212850805U (en) | 2020-09-04 | 2020-09-04 | Brake control system and ship video monitoring camera equipment |
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| Publication Number | Publication Date |
|---|---|
| CN212850805U true CN212850805U (en) | 2021-03-30 |
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| CN202021925718.9U Active CN212850805U (en) | 2020-09-04 | 2020-09-04 | Brake control system and ship video monitoring camera equipment |
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