CN201319143Y

CN201319143Y - Tripod head control device

Info

Publication number: CN201319143Y
Application number: CNU2008202140995U
Authority: CN
Inventors: 王载前
Original assignee: Shenzhen Coship Electronics Co Ltd
Current assignee: Shenzhen Coship Electronics Co Ltd
Priority date: 2008-12-01
Filing date: 2008-12-01
Publication date: 2009-09-30
Anticipated expiration: 2018-12-01

Abstract

The utility model provides a tripod head control device, which comprises an MCU for sending a control instruction, a drive circuit for receiving the control instruction, a motor connected with the drive circuit, and a driving mechanism and a detection device which are driven by the motor, wherein the detection device is connected between the MCU and the driving mechanism; and after being connected between the MCU and the driving mechanism, the detection device directly feeds back position information to the MCU to form complete and reliable closed loop control. Compared with the semi-closed loop control mode, the technical proposal improves the precision of the tripod head and reduces the motion error. Meanwhile, the detection device is connected with the motor, and the motor does not adopt an expensive servo motor, so the technical proposal also reduces the cost and strengthens the market competitiveness.

Description

A kind of tripod head controlling device

Technical field

The utility model belongs to safety-security area, relates in particular to a kind of tripod head controlling device.

Background technology

Tripod head controlling device is that application is very wide in the safety-security area, development is also installed very rapidly, particularly on clipping the ball, used widely, most tripod head controlling device is controlled by level, vertical two-way motor respectively in the prior art, and the Electric Machine Control mode adopts open loop control or minority to adopt half-closed loop control usually.

As shown in Figure 1, this tripod head controlling device adopts open loop control mode, control chip (MCU, MicroController Unit) 11 after the reference position receives movement instruction, send motion control instruction to driving circuit 12, driving circuit 12 is realized that gear train 14 moves, thereby is made the video camera on the gear train 14 can move to the target location according to motion control instruction control step motor 13 rotating certain angle on level or vertical direction.

The shortcoming of above-mentioned open loop control mode is, described device requires very high to stepper motor 13, when stepper motor 13 is lost the step (problems that stepper motor 13 occurs easily) or gear train 14 and run into bigger resistance and stop (load of stepper motor 13 is lower), then can not reach default position.

As shown in Figure 2, this tripod head controlling device adopts half-closed loop control mode, and the difference of itself and open loop control mode is that motor need adopt expensive servomotor 15, be connected with pick-up unit 16 between motor 15 and MCU11, the motion state that is used to feed back motor 15 forms servocontrol.

The shortcoming of this half-closed loop control mode is, because it is directly from motor 15 feedback informations, there are not secondary gear trains such as gear or driving-belt, permissible accuracy is influential, and do not have and control under the secondary gear train very high (the multiselect servomotor of motor requirement, cost an arm and a leg), suddenly stop phenomenon and cause electrical machinery life to shorten.

The utility model content

The technical problems to be solved in the utility model is, a kind of tripod head controlling device is provided, and can guarantee control accuracy, and reduce cost.

In order to solve the problems of the technologies described above, the utility model provides a kind of tripod head controlling device, comprise the MCU of sending controling instruction, the driving circuit that receives described steering order, the motor that is connected with described driving circuit, by described motor-driven gear train and pick-up unit, it is characterized in that: described pick-up unit is connected between described MCU and the gear train.

After pick-up unit is connected between MCU and the gear train, the positional information of gear train directly can be fed back to MCU, form complete reliable closed-loop control, compare with the half-closed loop control mode, the technical program has improved the precision of The Cloud Terrace, has reduced kinematic error.Simultaneously because pick-up unit directly is not connected with motor, and motor need not to adopt expensive servomotor, so the technical program also reduced cost, strengthened the competitiveness of product in market.

Description of drawings

Fig. 1 is the high-level schematic functional block diagram that a kind of tripod head controlling device that prior art provides adopts open loop control mode;

Fig. 2 is the high-level schematic functional block diagram that a kind of tripod head controlling device that prior art provides adopts the half-closed loop control mode;

Fig. 3 is the high-level schematic functional block diagram of a kind of tripod head controlling device of providing of the utility model embodiment;

Fig. 4 is the structural representation of the horizontal execution architecture of a kind of tripod head controlling device of providing of the utility model embodiment;

Fig. 5 is the one-piece construction synoptic diagram of a kind of tripod head controlling device of providing of the utility model embodiment.

Embodiment

In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

See also Fig. 3, the utility model embodiment provides a kind of tripod head controlling device, comprises the MCU21 of sending controling instruction, the driving circuit 22 that receives the MCU21 steering order, the motor 23 that is connected with driving circuit 22, by the gear train 24 and the pick-up unit 25 of motor 23 drivings.Pick-up unit 25 is connected between MCU21 and the gear train 24, forms closed-loop control.

Particularly, tripod head controlling device can be realized the motion of level and vertical direction in the present embodiment, above-mentioned driving circuit 22 comprises first driving circuit 221 and second driving circuit 222, motor 23 comprises first motor 231 and second motor 232, gear train 24 comprises horizontal gear train 241 and vertical gear train 242, and pick-up unit 25 comprises first pick-up unit 251 and second pick-up unit 252.First driving circuit 221, first motor 231 are connected successively with horizontal gear train 241, the control The Cloud Terrace moves in the horizontal direction, first pick-up unit 251 is connected between MCU21 and the horizontal gear train 241, forms closed-loop control, is used for the motion state of feedback level gear train 241; Second driving circuit 222, second motor 232 and vertical gear train 242 are connected successively, the control The Cloud Terrace is in movement in vertical direction, second pick-up unit 252 is connected between MCU21 and the vertical gear train 242, forms closed-loop control, is used to feed back the motion state of vertical gear train 242.

Please consult Fig. 4 again, horizontal gear train 241 comprises first support 2411, first drive plate 2412, first driving-belt 2413 and is fixed in first transmission shaft 2415 on first drive plate 2412.Wherein, first motor 231 is fixed on first support 2411, and first drive plate 2412 is installed on the clipping the ball housing (not shown), and is in transmission connection by the output shaft of first driving-belt 2413 and first motor 231.First support 2411 is provided with clutch shaft bearing 2416, the first transmission shafts 2415 and is arranged in the clutch shaft bearing 2416.Because first drive plate 2412 is fixing, after first motor 231 started, first driving-belt 2413 drove first support 2411 and rotates, and clutch shaft bearing 2416 is rotated relative to first transmission shaft 2415.

First pick-up unit 251 comprises that first body 2511 and first brush, 2512, the first brushes of being located in first body 2,511 2512 are fixed on first transmission shaft 2415.Be provided with clamping plate 2513, the first bodies 2511 and be fixed in by clamping plate 2513 on first support 2411 between first support 2411 and first body 2511, clamping plate 2513 plays the effect that connects first support 2411 and clutch shaft bearing 2416 outer rings simultaneously.Also be provided with PCB2514 between first body 2511 and the clamping plate 2513, MCU21 is arranged on the PCB2514, and the conductor part of first body 2511 connects by pin and is welded on the PCB2514.When first support 2411 rotated, first body 2511 rotated relative to first brush 2512, and first brush 2512 passes to MCU21 processing on the PCB2514 with detection information, and MCU21 carries out sending controling instruction after the position analysis, up to reaching the target location.

See also Fig. 5, vertical gear train 242 comprises second support 2421, second drive plate 2422, second driving-belt 2423 and the second transmission shaft (not shown).Second drive plate 2422 is fixed on second support 2421, and second drive plate 2422 is in transmission connection by the output shaft of second driving-belt 2423 and second motor 232, and second transmission shaft is arranged in second drive plate 2422.Second pick-up unit 252 comprises the second body (not shown) and is arranged at the second intrinsic second brush (not shown), the mounting means of second pick-up unit 252 is similar to first pick-up unit 251, second brush is fixed on second transmission shaft, second body is fixed on second support 2421 by a clamping plate, and a watch-dog 26 (for example video camera) is in transmission connection with second transmission shaft.

After second motor 232 started, second driving-belt 2423 drove second drive plate 2422 and rotates, and second transmission shaft that is arranged on second drive plate 2422 also correspondingly rotates, thereby realized the rotation of watch-dog 26.Similar to first pick-up unit, 251 principle of work, second body of second pick-up unit 252 is relative with second brush to be moved, and second brush passes to MCU with positional information and handles, up to moving to the target location.

First support 2411 and second support 2421 are for fixedlying connected, and during 231 work of first motor, second support 2421 rotates with first support 2411, drives watch-dog 26 and moves horizontally.

Wherein, pick-up unit 25 can be selected multispeed revolver, absolute pulse encoder, round induction synchrometer, rotary transformer, circle grating for use or all justify magnetic grid, even can select potentiometer for use.Like this, the control of software also can obtain very big development, can simplify the method for a lot of software controls.

After pick-up unit 25 is connected between MCU21 and the gear train 24, the positional information of gear train 24 is directly fed back to MCU21, form complete reliable closed-loop control, compare with the half-closed loop control mode, the technical program has improved the precision of The Cloud Terrace, has reduced kinematic error.Simultaneously owing to pick-up unit 25 is connected with motor 23, motor 23 need not to adopt expensive servomotor, can select other motors such as low-cost stepper motor, direct current generator for use, so the technical program also reduces cost, strengthened the market competitiveness.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1, a kind of tripod head controlling device, comprise the MCU of sending controling instruction, the driving circuit that receives described steering order, the motor that is connected with described driving circuit, by described motor-driven gear train and pick-up unit, it is characterized in that: described pick-up unit is connected between described MCU and the gear train.

2, tripod head controlling device as claimed in claim 1, it is characterized in that: described driving circuit comprises first driving circuit and second driving circuit, described motor comprises first motor and second motor, described gear train comprises horizontal gear train and vertical gear train, described pick-up unit comprises first pick-up unit and second pick-up unit, described first driving circuit, first motor is connected successively with horizontal gear train, described second driving circuit, second motor is connected successively with vertical gear train, described first pick-up unit is connected between described MCU and the horizontal gear train, and described second pick-up unit is connected between described MCU and the vertical gear train.

3, tripod head controlling device as claimed in claim 2, it is characterized in that: described horizontal gear train comprises first support, first drive plate, first driving-belt and first transmission shaft that is fixed on described first drive plate, described first motor is fixed on described first support, described first drive plate is in transmission connection by the output shaft of described first driving-belt and described first motor, described first support is provided with clutch shaft bearing, described first transmission shaft is arranged in the described clutch shaft bearing, described first pick-up unit comprises first body and is located at described first intrinsic first brush, described first brush is fixed on first transmission shaft, and described first body is fixed on first support.

4, tripod head controlling device as claimed in claim 3 is characterized in that: be provided with clamping plate between described first support and first body.

5, tripod head controlling device as claimed in claim 4 is characterized in that: described first body is connected with a PCB, and described MCU is arranged on the described PCB.

6, tripod head controlling device as claimed in claim 2, it is characterized in that: described vertical gear train comprises second support, second drive plate, second driving-belt and second transmission shaft, described second drive plate is fixed on described second support, described second drive plate is in transmission connection by the output shaft of described second driving-belt and described second motor, described second transmission shaft is arranged in described second drive plate, described second pick-up unit comprises second body and is arranged at described second intrinsic second brush, described second brush is fixed on second transmission shaft, described second body is fixed on second support, and a watch-dog and described second transmission shaft are in transmission connection.

7 tripod head controlling devices as claimed in claim 3, it is characterized in that: described vertical gear train comprises second support, second drive plate, second driving-belt and second transmission shaft, described second drive plate is fixed on described second support, described second drive plate is in transmission connection by the output shaft of described second driving-belt and described second motor, described second transmission shaft is arranged in described second drive plate, described second pick-up unit comprises second body and is arranged at described second intrinsic second brush, described second brush is fixed on second transmission shaft, described second body is fixed on second support, and a watch-dog and described second transmission shaft are in transmission connection.

8, tripod head controlling device as claimed in claim 7 is characterized in that: described first support is fixedlyed connected with second support.