Image acquisition control system
By synchronously controlling the activation of the liquid lens and the fill light in the image acquisition system, the image quality problem caused by separate control of the fill light and the lens is solved, achieving high-quality and efficient image acquisition.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-24
AI Technical Summary
In traditional image acquisition systems, the separate control of the supplementary light and the lens results in the supplementary light not reaching optimal brightness or the lens not completing focus at the moment of exposure, affecting image quality and making it impossible to quickly identify logistics information.
By connecting the camera's exposure pin to the EN pin of the lens driver chip and the B2 pin of the fill light control chip respectively, the liquid lens and fill light are activated synchronously when the camera is exposed, thus coordinating the lens focusing and the fill light illumination.
It significantly improves the quality and efficiency of image acquisition, ensuring rapid identification of logistics information and improving work efficiency.
Smart Images
Figure CN224037431U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to image acquisition technical field especially relates to an image acquisition control system. BACKGROUND
[0002] In the image acquisition field, especially in some application scenarios with high requirements on image quality and acquisition efficiency, such as logistics information acquisition application scenarios, in the traditional image acquisition system, the focusing of the fill light and the lens is often controlled separately, which leads to that at the exposure moment, the fill light may not have reached the best brightness, or the lens has not completed focusing, thereby affecting the quality of the image, and further unable to quickly identify the collected logistics information. For example, when shooting in a low-light environment, the delayed start of the fill light may cause insufficient image exposure; and when shooting a high-speed moving object, the delay of the lens focusing may cause image blur. SUMMARY
[0003] The utility model provides a kind of image acquisition control system to solve the focusing of the fill light and the lens in prior art is often controlled separately, which leads to that at the exposure moment, the fill light may not have reached the best brightness, or the lens has not completed focusing, thereby affecting the quality of the image, and further unable to quickly identify the collected logistics information problem.
[0004] The utility model provides a kind of image acquisition control system, comprising: camera, CPU, fill light control chip, fill light, lens drive chip and liquid lens;
[0005] The camera is connected with CPU, lens drive chip and fill light control chip respectively, and the CPU is connected with lens drive chip and fill light control chip respectively;The lens drive chip is connected with liquid lens, and the fill light control chip is connected with fill light.
[0006] The control pin of the camera is connected with CPU, and the exposure pin of the camera is connected with the EN pin of lens drive chip and the B2 pin of fill light control chip respectively.
[0007] According to the image acquisition control system provided by the utility model, the power supply is connected with fill light control chip and lens drive chip respectively.
[0008] According to the image acquisition control system provided by the utility model, the fill light control chip has 12 pins, the A2 pin, the C2 pin and the C3 pin are connected with power supply respectively, the B1 pin is also connected with power supply through first inductor;The D2 pin is suspended, the A3 pin and the B3 pin are connected with CPU respectively, the A1 pin and the C1 pin are grounded, and the D3 pin and the D1 pin are connected with a fill light respectively.
[0009] The lens driving chip has 8 pins, the SDA and SCL pins are connected with a CPU respectively, the GND and VREF pins are grounded respectively, the VA and VB are connected with a liquid lens respectively, and the VDD pin is connected with a power supply.
[0010] The power supply is grounded through a first capacitor on a connecting line of the VDD pin of the lens driving chip.
[0011] The VREF pin of the lens driving chip is grounded through a second capacitor.
[0012] The power supply and the light supplement control chip are connected through a third capacitor and a fourth capacitor in parallel.
[0013] The C1 pin of the light supplement control chip is grounded through a fifth capacitor.
[0014] The C3 pin of the light supplement control chip is connected with a first resistor in series on a connecting line of the power supply.
[0015] The C2 pin of the light supplement control chip is connected with a second resistor in series on a connecting line of the power supply.
[0016] The B2 pin of the light supplement control chip is grounded through a third resistor.
[0017] The image acquisition control system provided by the utility model realizes synchronous starting of the liquid lens and the light supplement lamp when the camera is exposed, significantly improves the quality, efficiency and stability of image acquisition, thereby quickly identifying logistics information on the image and improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0019] Fig. 1It is the electrical diagram of the image acquisition control system provided by the utility model;
[0020] Fig. 2 It is the circuit diagram of the image acquisition control system provided by the utility model;
[0021] Fig. 3 It is the timing chart of camera exposure, liquid lens and light supplement lamp. Specific implementation
[0022] In order to make the purpose, technical scheme and advantage of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making the creative labor belong to the scope of protection of the utility model.
[0023] The utility model discloses an image acquisition control system, which is applied to a bar code scanning device to acquire bar code images on objects and obtain information attached to the bar code through decoding. Figs. 1-3 The image acquisition control system comprises a power supply, a camera, a CPU, a light supplement control chip U2, a light supplement lamp, a lens driving chip U1 and a liquid lens.
[0024] The camera is connected with the CPU, the lens driving chip U1 and the light supplement control chip U2 respectively, and the CPU is connected with the lens driving chip U1 and the light supplement control chip U2 respectively; the lens driving chip U1 is connected with the liquid lens, and the light supplement control chip U2 is connected with the light supplement lamp; the power supply is connected with the light supplement control chip U2 and the lens driving chip U1 respectively.
[0025] The control pin of the camera is connected with the CPU, and the exposure pin of the camera is connected with the EN pin of the lens driving chip U1 and the B2 pin of the light supplement control chip U2 respectively.
[0026] Specifically, the model of the light supplement control chip U2 is LM3644, which has 12 pins, namely A2 (IN), C2 (HWEN), C3 (TORCH / TEMP), B1 (SW), D2 (TX), A3 (SDA), B3 (SCL), B2 (STROBE), A1 (GND), C1 (OUT), D3 (LED1) and D1 (LED2) pins; the A2, C2 and C3 pins of the light supplement control chip U2 are connected with the power supply respectively, the B1 pin is also connected with the power supply through the first inductor L1; the D2 pin is suspended, the A3 and B3 pins are connected with the CPU respectively, the A1 and C1 pins are grounded, and the D3 and D1 pins are connected with a light supplement lamp respectively.
[0027] The B2 pin of the light supplement control chip U2 is a switch pin, when the B2 pin is high, the light supplement control chip U2 is in an open and working state, at this time, the CPU controls the light intensity, flashing frequency and other working states of the light supplement lamp through the A3 and B3 pins of the light supplement control chip U2, and the light intensity, flashing frequency and other parameters are pre-stored in the CPU.
[0028] The lens drive chip U1 is MAX14515, which has 8 pins, namely SDA, SCL, EN, GND, VREF, VA, VB and VDD pins; the SDA and SCL pins of the lens drive chip U1 are connected with the CPU, the GND and VREF pins are grounded, the VA and VB are connected with the liquid lens, and the VDD pin is connected with the power supply;
[0029] The EN pin of the lens drive chip U1 is a switch pin, when the EN pin is high, the lens drive chip U1 is in an open and working state, at this time, the CPU controls the start and focusing of the liquid lens through the SDA and SCL pins of the lens drive chip U1.
[0030] In work, the power supply supplies power to the lens drive chip U1, the light supplement control chip U2 and other electronic components; the CPU controls the start and stop of the camera, when the camera starts to expose, a high level signal is output to the lens drive chip U1 and the light supplement control chip U2 through the exposure pin, so that the liquid lens starts to focus synchronously, and the light supplement lamp is lit at the exposure moment to provide sufficient light conditions, under the mutual coordination, the whole image acquisition system can collect high-quality images as much as possible. When the camera ends exposure, the exposure pin of the camera becomes low, and then the EN pin of the lens drive chip U1 and the B2 pin of the light supplement control chip U2 become low, the lens drive chip U1 and the light supplement control chip U2 are synchronously closed and suspended, and then the liquid lens enters the sleep mode, and the light supplement lamp is synchronously closed.
[0031] Further, in order to increase the reliability (voltage stabilization, current limiting, filtering) of the system, other functional electronic components are included in the circuit of the application, such as: the connection line between the power supply and the VDD pin of the lens drive chip U1 is grounded through the first capacitor C10, and the VREF pin of the lens drive chip U1 is grounded through the second capacitor C20.
[0032] The circuit connected with the power supply and the light supplement control chip U2 is further grounded through the third capacitor C30 and the fourth capacitor C40 in parallel state, the C1 pin of the light supplement control chip U2 is grounded through the fifth capacitor C50, the C3 pin of the light supplement control chip U2 is connected with the circuit of the power supply and the first resistor R1 is connected in series on the circuit, the C2 pin of the light supplement control chip U2 is connected with the circuit of the power supply and the second resistor R2 is connected in series on the circuit, and the B2 pin of the light supplement control chip U2 is further grounded through the third resistor R3.
[0033] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. An image acquisition and control system, characterized in that, include: Camera, CPU, fill light control chip, fill light, lens driver chip and liquid lens; The camera is connected to the CPU, the lens driver chip, and the fill light control chip respectively. The CPU is connected to the lens driver chip and the fill light control chip respectively. The lens driver chip is connected to the liquid lens, and the fill light control chip is connected to the fill light. The camera's control pin is connected to the CPU, and the camera's exposure pin is connected to the EN pin of the lens driver chip and the B2 pin of the fill light control chip, respectively.
2. The image acquisition and control system according to claim 1, characterized in that, It also includes a power supply, which is connected to the fill light control chip and the lens driver chip respectively.
3. The image acquisition and control system according to claim 2, characterized in that, The supplementary lighting control chip has 12 pins. Pins A2, C2, and C3 are connected to the power supply, and pin B1 is also connected to the power supply through a first inductor. Pin D2 is left floating, pins A3 and B3 are connected to the CPU, pins A1 and C1 are grounded, and pins D3 and D1 are connected to a supplementary light.
4. The image acquisition and control system according to claim 2, characterized in that, The lens driver chip has 8 pins. Its SDA and SCL pins are connected to the CPU, GND and VREF pins are grounded, VA and VB are connected to the liquid lens, and VDD pin is connected to the power supply.
5. The image acquisition and control system according to claim 4, characterized in that, The connection line between the power supply and the VDD pin of the lens driver chip is grounded through a first capacitor.
6. The image acquisition and control system according to claim 4, characterized in that, The VREF pin of the lens driver chip is grounded through a second capacitor.
7. The image acquisition and control system according to claim 3, characterized in that, The power supply and the supplementary lighting control chip are connected to ground via a third and a fourth capacitor connected in parallel.
8. The image acquisition and control system according to claim 7, characterized in that, The C1 pin of the supplementary lighting control chip is grounded through the fifth capacitor.
9. The image acquisition and control system according to claim 7, characterized in that, A first resistor is connected in series on the line connecting the C3 pin of the supplementary lighting control chip to the power supply.
10. The image acquisition and control system according to claim 7, characterized in that, A second resistor is connected in series on the line connecting the C2 pin of the supplementary lighting control chip to the power supply.