CN214202159U

CN214202159U - Image stabilizing device based on micro-motion mechanism

Info

Publication number: CN214202159U
Application number: CN202120108452.7U
Authority: CN
Inventors: 梁陈; 孙洪宇; 董立春; 陈嘉平; 袁泉; 于洋
Original assignee: Harbin Xinguang Photoelectric Technology Co ltd
Current assignee: Harbin Xinguang Photoelectric Technology Co ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-09-14
Anticipated expiration: 2031-01-15

Abstract

The utility model relates to an image stabilization device based on micro-motion mechanism for solve the electron image stabilization mode of prior art and can introduce the delayed defect of image. The utility model comprises a rate top, a comprehensive control plate, a micro-motion mechanism controller and a micro-motion mechanism driving system which are connected in sequence; the acquisition output end of the rate gyro is connected with the acquisition input end of the comprehensive control board; the control output end of the comprehensive control plate is connected with the control input end of a micro-motion mechanism controller, and the micro-motion mechanism controller is connected with the control input end of a micro-motion mechanism control system. The micro-motion mechanism driving system comprises a driving circuit, a measuring circuit and a capacitance displacement sensor, wherein the driving circuit is connected with the micro-motion mechanism controller and is connected with the piezoelectric ceramic; the measuring circuit is connected with the capacitance displacement sensor and the micro-motion mechanism controller. The utility model is suitable for an infrared guidance system.

Description

Image stabilizing device based on micro-motion mechanism

Technical Field

The utility model relates to an infrared imaging system image stabilization device field, concretely relates to image stabilization device based on fine motion mechanism.

Background

In the prior art, a platform image stabilization mode or an electronic image stabilization mode is adopted for image stabilization. The platform image stabilization mode is that a servo motor controls an optical lens and a detector to perform compensation motion, so that the stability of an optical axis is maintained, but the defect is that the dynamic range is low; the electronic image stabilization method adopts an image processing method to process continuous multi-frame images to obtain image stabilization data, but has the disadvantages of reducing the image frame frequency and introducing image delay.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is to solve the defect that the electron steady image mode of prior art can introduce the image delay.

According to a first aspect of the present invention, there is provided an image stabilization device based on a micro-motion mechanism, comprising a rate gyroscope, a comprehensive control plate, a micro-motion mechanism controller and a micro-motion mechanism driving system connected in sequence; the acquisition output end of the rate gyro is connected with the acquisition input end of the comprehensive control board; the control output end of the comprehensive control plate is connected with the control input end of the micro-motion mechanism controller, and the control output end of the micro-motion mechanism controller is connected with the control input end of the micro-motion mechanism control system.

Preferably, the micro-motion mechanism driving system comprises a driving circuit, a measuring circuit and a capacitance displacement sensor, wherein the input end of the driving circuit is connected with the driving control end of the micro-motion mechanism controller, and the output end of the driving circuit is connected with the piezoelectric ceramic; the input end of the measuring circuit is connected with the acquisition output end of the capacitance displacement sensor, and the output end of the measuring circuit is connected with the measurement acquisition end of the micro-motion mechanism controller.

Preferably, the capacitance displacement sensor is of the type CYW-DW-C025.

Preferably, the micro-motion mechanism controller is of type C8051F 020.

Preferably, the comprehensive control board is an FPGA control board.

The utility model has the advantages that: 1. hardware realization of an image stabilizing mode is provided to replace an electronic image stabilizing mode in the prior art; 2. the motion bandwidth of the system is improved, and the capability of inhibiting image blurring caused by high-frequency disturbance is improved; 3. this method does not cause delay or reduce the output image frame rate compared to the electronic image stabilization method.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic block diagram of an embodiment of the present invention;

FIG. 2 is a block diagram of an embodiment of the present invention;

fig. 3 is a control schematic block diagram of a micro-motion mechanism controller according to an embodiment of the present invention;

fig. 4 is a circuit diagram of a piezoelectric ceramic driving circuit according to an embodiment of the present invention;

fig. 5 is a circuit diagram of the peripheral circuit of the rate gyro according to an embodiment of the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The utility model provides an image stabilizing device based on a micro-motion mechanism, as shown in figure 1, comprising a rate top, a comprehensive control board, a micro-motion mechanism controller and a micro-motion mechanism driving system which are connected in sequence; the acquisition output end of the rate gyro is connected with the acquisition input end of the comprehensive control board; the control output end of the comprehensive control plate is connected with the control input end of the micro-motion mechanism controller, and the control output end of the micro-motion mechanism controller is connected with the control input end of the micro-motion mechanism control system.

Furthermore, the micro-motion mechanism driving system comprises a driving circuit, a measuring circuit and a capacitance displacement sensor, wherein the input end of the driving circuit is connected with the driving control end of the micro-motion mechanism controller, and the output end of the driving circuit is connected with the piezoelectric ceramic; the input end of the measuring circuit is connected with the acquisition output end of the capacitance displacement sensor, and the output end of the measuring circuit is connected with the measurement acquisition end of the micro-motion mechanism controller.

In one embodiment, the capacitive displacement sensor is of the type CYW-DW-C025. The model of the micro-motion mechanism controller is C8051F 020. The comprehensive control board is an FPGA control board. The utility model provides a micro-motion mechanism actuating system has multiple selection, can use existing X-Y two-dimensional fine motion control cabinet among the prior art, also can use as shown in figure 2 the form of capacitance displacement sensor, drive circuit, measuring circuit to realize.

The utility model discloses a principle is, on installing micro-gap mechanism braced frame with the detector, when disturbance appears in the output optical axis of optical lens group, through controlling micro-gap mechanism translation, maintains the position of optical axis on the focal plane to reach the effect of steady image. Compared with a platform image stabilization mode, the micro-motion mechanism is stronger in dynamic performance and can cope with stronger disturbance. Compared with an electronic image stabilization mode, the image stabilization mode has smaller delay and does not reduce the image output frame frequency.

It should be noted that, since the present invention aims to provide a circuit system, the piezoelectric ceramics and the supporting frame in fig. 2 are only used for explaining the position of the sensor installation, the driving object of the driving circuit and the measuring object of the measuring circuit, so that the detailed parameters and the structure diagram of the piezoelectric ceramics and the supporting frame are not disclosed, and no matter how their structures are, the implementation of the circuit system of the present invention is not affected.

Fig. 3 shows the control principle of a micro-motion mechanism controller, which moves a frame through an amplifying circuit and a driving circuit, detects the movement of the frame through a displacement sensor, converts and measures the movement through a digital-to-analog conversion circuit, and sends the movement to the controller.

FIG. 4 shows a piezoelectric ceramic drive principle, in which V_mFor input voltage, PZT is a piezoelectric ceramic, and PA93 and OP are both amplifiers. The charging current of the piezoelectric ceramic is proportional to the input voltage, and the proportionality coefficient is the resistance value of the feedback resistor. Fig. 4 shows a current control type actuator which controls the amount of charge of a piezoelectric ceramic by precisely controlling the charge current and time of the piezoelectric ceramic according to the principle that the displacement of the piezoelectric ceramic and the amount of charge carried thereby are in a linear relationship, thereby realizing linear driving.

Fig. 5 is a wiring diagram of a rate gyro, and an embodiment of the present invention selects MPU6050 to implement the acquisition function.

The utility model discloses only require protection hardware connection relation, do not rely on the software to realize. The utility model discloses an aim at uses hardware system to replace traditional image stabilization mode, and after hardware connection mode and component lectotype were confirmed, technical personnel in this field can confirm control logic according to prior art's knowledge, the utility model discloses do not limit to this.

< example >

An embodiment of the present invention is shown in fig. 2, and includes a micro-motion mechanism system 1, a rate gyro 2, a detector 3, an optical lens 4, a micro-motion mechanism controller 5, and a comprehensive control board 6. And the rate gyroscope measures the projectile body disturbance, acquires projectile body disturbance information and sends the projectile body disturbance information to the comprehensive control board through the RS 422. And the comprehensive control board is communicated with the missile computer through the CANFD to acquire the flight attitude information of the missile. And according to the received gyro data, calculating the motion compensation quantity of the micro-motion mechanism, and sending the compensation quantity to the micro-motion mechanism controller. The micro-motion mechanism controller controls the piezoelectric ceramics to carry out closed-loop control according to the control instruction received by the comprehensive control board and the displacement information detected by the high-precision sensor, so that the micro-motion mechanism moves according to a planned curve. The reflecting angle of the incident light is controlled by the movement of the micro-motion mechanism.

In this embodiment, the micro-motion mechanism system 1 includes piezoelectric ceramics, a support frame for mounting an infrared detector, and a high-precision sensor. And according to the control quantity of the micro mechanism controller 5, the closed-loop control of the frame is completed by driving the piezoelectric ceramic to control the frame to move and the movement position of the high-precision sensor frame. The rate gyroscope 2 is used for sensing carrier disturbance, is collected by the comprehensive control plate 6 and controls the frame to move through the optical lens 4, and influences of the carrier disturbance on infrared imaging of the uncooled detector are weakened. And the detector 3 is used for receiving the infrared signal on the focal plane and generating an infrared image. The optical lens 4 is used for filtering stray light and focusing infrared rays on a focal plane of the detector. The micro-motion device controller 5 is used for controlling the micro-motion device system 1 to move according to the control signal of the comprehensive control board 6, so that the optical axis is stable in the sampling time of the detector. And the comprehensive control plate 6 is used for obtaining compensation data according to the motion state of the projectile body and the projectile body disturbance sensed by the rate gyro 2 and sending the compensation data to the micro-motion mechanism controller 5.

One working process of this embodiment is: after stray light of an infrared signal input from the outside is filtered by an optical lens group of the forming device, an optical signal of an infrared band is focused on a photosensitive surface of the infrared detector. The comprehensive control plate sends a processed signal to the micro-motion mechanism controller according to projectile body flying state information and projectile body disturbance detected by the rate gyro, and the micro-motion mechanism controller controls the micro-motion mechanism system according to instruction content to complete closed-loop control by using the high-precision sensor and the piezoelectric ceramics, so that the moving position of a frame loaded with the detector is controlled, and optical axis deviation caused by projectile body flying and disturbance is compensated.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An image stabilizing device based on a micro-motion mechanism is characterized by comprising a rate gyro, a comprehensive control plate, a micro-motion mechanism controller and a micro-motion mechanism driving system which are sequentially connected; the acquisition output end of the rate gyro is connected with the acquisition input end of the comprehensive control board; the control output end of the comprehensive control plate is connected with the control input end of the micro-motion mechanism controller, and the control output end of the micro-motion mechanism controller is connected with the control input end of the micro-motion mechanism control system.

2. The image stabilization device based on the micro-motion mechanism according to claim 1, wherein the micro-motion mechanism driving system comprises a driving circuit, a measuring circuit and a capacitance displacement sensor, wherein the input end of the driving circuit is connected with the driving control end of the micro-motion mechanism controller, and the output end of the driving circuit is connected with the piezoelectric ceramic; the input end of the measuring circuit is connected with the acquisition output end of the capacitance displacement sensor, and the output end of the measuring circuit is connected with the measurement acquisition end of the micro-motion mechanism controller.

3. The image stabilization device based on a micro-motion mechanism according to claim 2, wherein the capacitive displacement sensor is of the type CYW-DW-C025.

4. The image stabilization device based on the micro-motion mechanism according to claim 1, wherein the micro-motion mechanism controller is of type C8051F 020.

5. The image stabilization device based on the micro-motion mechanism according to claim 1, wherein the integrated control board is an FPGA control board.