Image acquisition control system of scanning equipment
By synchronously controlling the lens driver chip and the fill light control chip without enable pins, the problem of mismatch between lens and fill light control is solved, achieving efficient and low-power image acquisition, and improving image quality and work efficiency.
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 existing image acquisition systems, the separate control of the lens and the fill light leads to a mismatch between brightness and focus at the moment of exposure, affecting image quality. Furthermore, the design of the enable pin increases the power consumption of the scanning device.
The system employs a lens driver chip and a fill light control chip without enable pins. It connects to the CPU through the camera's exposure pin to achieve synchronous control of the liquid lens and fill light. It is directly powered by the CPU, reducing the overall power consumption of the device.
It enables the synchronous start-up of the liquid lens and the fill light, improving the quality and efficiency of image acquisition, reducing the overall power consumption of the scanning equipment, and increasing work efficiency.
Smart Images
Figure CN224037448U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to image acquisition technical field especially relates to a scanning equipment's 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 in 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. In most existing image acquisition control circuits, a lens driving chip with an enable pin is adopted, which not only needs a power supply to supply power separately, but also needs to control the working state of the enable pin through the exposure pin of the camera. Such design undoubtedly increases the overall power consumption of the scanning equipment, which is not conducive to long-term use. There is an urgent need for a universal chip without an enable pin to replace the lens driving chip in the above-mentioned circuit, so that the chip can still complete the synchronous control of the liquid lens and the fill light without the enable pin. SUMMARY
[0003] The utility model provides a scanning equipment's image acquisition control system to solve the problem that the lens driving chip with the enable pin is adopted to control the liquid lens in the prior art, which needs a power supply to supply power separately and controls the working state through the exposure pin of the camera, thereby increasing the load of the circuit and the overall power consumption of the scanning equipment.
[0004] The utility model provides a scanning equipment's image acquisition control system, which comprises a camera, a CPU, a fill light control chip, a fill light, a lens driving chip and a liquid lens.
[0005] The camera is connected with the CPU and the fill light control chip respectively, and the CPU is connected with the lens driving chip and the fill light control chip respectively.
[0006] The control pin of the camera is connected with the CPU, and the exposure pin of the camera is connected with the CPU and the fill light control chip respectively.
[0007] The utility model provides a scanning equipment's image acquisition control system further comprises a power supply, and the power supply is connected with the fill light control chip.
[0008] The light supplement control chip has 12 pins, the A2, C2 and C3 pins are connected with the power supply respectively, the B1 pin is also connected with the power supply through the first inductor, the D2 pin is suspended, the A3 and B3 pins are connected with the CPU respectively, the B2 pin is connected with the exposure pin of the camera, the A1 and C1 pins are grounded respectively, and the D3 and D1 pins are connected with a light supplement lamp respectively.
[0009] The lens driving chip has 6 pins, the VDD, SDA and SCL pins are connected with the CPU respectively, the GND pin is grounded, and the OUTN and OUTP are connected with the liquid lens respectively.
[0010] The light supplement control chip has 12 pins, the A2, C2 and C3 pins are connected with the power supply respectively, the B1 pin is also connected with the power supply through the first inductor, the D2 pin is suspended, the A3 and B3 pins are connected with the CPU respectively, the B2 pin is connected with the exposure pin of the camera, the A1 and C1 pins are grounded respectively, and the D3 and D1 pins are connected with a light supplement lamp respectively.
[0011] The light supplement control chip has 12 pins, the A2, C2 and C3 pins are connected with the power supply respectively, the B1 pin is also connected with the power supply through the first inductor, the D2 pin is suspended, the A3 and B3 pins are connected with the CPU respectively, the B2 pin is connected with the exposure pin of the camera, the A1 and C1 pins are grounded respectively, and the D3 and D1 pins are connected with a light supplement lamp respectively.
[0012] The light supplement control chip has 12 pins, the A2, C2 and C3 pins are connected with the power supply respectively, the B1 pin is also connected with the power supply through the first inductor, the D2 pin is suspended, the A3 and B3 pins are connected with the CPU respectively, the B2 pin is connected with the exposure pin of the camera, the A1 and C1 pins are grounded respectively, and the D3 and D1 pins are connected with a light supplement lamp respectively.
[0013] The light supplement control chip has 12 pins, the A2, C2 and C3 pins are connected with the power supply respectively, the B1 pin is also connected with the power supply through the first inductor, the D2 pin is suspended, the A3 and B3 pins are connected with the CPU respectively, the B2 pin is connected with the exposure pin of the camera, the A1 and C1 pins are grounded respectively, and the D3 and D1 pins are connected with a light supplement lamp respectively.
[0014] The light supplement control chip has 12 pins, the A2, C2 and C3 pins are connected with the power supply respectively, the B1 pin is also connected with the power supply through the first inductor, the D2 pin is suspended, the A3 and B3 pins are connected with the CPU respectively, the B2 pin is connected with the exposure pin of the camera, the A1 and C1 pins are grounded respectively, and the D3 and D1 pins are connected with a light supplement lamp respectively.
[0015] The light supplement control chip has 12 pins, the A2, C2 and C3 pins are connected with the power supply respectively, the B1 pin is also connected with the power supply through the first inductor, the D2 pin is suspended, the A3 and B3 pins are connected with the CPU respectively, the B2 pin is connected with the exposure pin of the camera, the A1 and C1 pins are grounded respectively, and the D3 and D1 pins are connected with a light supplement lamp respectively. BRIEF DESCRIPTION OF DRAWINGS
[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Fig. 1 This is an electrical block diagram of the image acquisition and control system of the scanning device provided by this utility model;
[0018] Fig. 2 This is a circuit diagram of the image acquisition and control system of the scanning device provided by this utility model;
[0019] Fig. 3 It is a timing diagram of camera exposure, liquid lens, and fill light. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] The following is combined with Figs. 1-3 This invention describes an image acquisition control system for a scanning device. This system is applied to various barcode scanning devices to acquire barcode images of objects and decode the information attached to the barcodes. The image acquisition control system includes: a power supply, a camera, a CPU, a supplementary lighting control chip U2, a supplementary light, a lens driver chip U1, and a liquid lens.
[0022] The camera is connected to the CPU and the fill light control chip U2 respectively. The CPU is connected to the lens driver chip U1 and the fill light control chip U2 respectively. The lens driver chip U1 is connected to the liquid lens, and the fill light control chip U2 is connected to the fill light. The power supply is connected to the fill light control chip U2.
[0023] The camera's control pins are connected to the CPU, and the camera's exposure pins are connected to the CPU and the fill light control chip U2, respectively.
[0024] 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); the A2, C2, and C3 pins of the light supplement control chip U2 are connected with the power supply, 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, the A1 and C1 pins are grounded, and the D3 and D1 pins are connected with a light supplement lamp, respectively.
[0025] The B2 pin of the light supplement control chip U2 is its switch pin, when the B2 pin is at a high level, the light supplement control chip U2 is in an open and working state, at this time, the CPU controls the light intensity, flicker 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, flicker frequency, and other parameters are pre-stored in the CPU.
[0026] The model of the lens drive chip U1 is PD50LE, which has 6 pins, namely: SDA, SCL, GND, VDD, OUTN, and OUTP; the VDD, SDA, and SCL pins of the lens drive chip U1 are connected with the CPU, the GND pin is grounded, and the OUTN and OUTP pins are connected with the liquid lens, respectively.
[0027] The VDD pin of the lens drive chip U1 is its switch pin, the IO_POWER pin of the CPU supplies power for the lens drive chip U1 through the VDD pin of the lens drive chip U1, and controls the opening and closing of the lens drive chip U1. When the IO_POWER pin of the CPU outputs a high level signal, the VDD pin of the lens drive chip U1 is at a high level state, and the lens drive chip U1 is in an open and working state, at the same time, the CPU controls the liquid lens to open through its IO_POWER pin, and also controls the start and focusing of the liquid lens through the SDA and SCL pins of the lens drive chip U1.
[0028] In working, the power supply supplies power for each electronic component such as the light supplement control chip U2, the light supplement lamp, etc., the CPU not only controls the start and the stop of the camera, but also supplies power for the lens driving chip U1 through the IO_POWER pin. When the collection work starts, the CPU first outputs a high level signal to the lens driving chip U1 through the IO_POWER pin in advance, so that the lens driving chip U1 is in the open state, and then the liquid lens is started synchronously and the focusing is completed, when the liquid lens completes the focusing, the camera starts exposure synchronously, outputs a high level signal to the light supplement control chip U2 through the exposure pin, and the light supplement lamp is also lit at the exposure moment, so as to provide sufficient light condition, under the mutual coordination, the whole image collection system can collect the high quality image as far as possible. When the camera ends the exposure (the exposure time is over or the exposure ends when the decoding is successful), the exposure pin of the camera and the IO_POWER pin of the CPU become low level, and then the VDD pin of the lens driving chip U1 and the B2 pin of the light supplement control chip U2 become low level, the lens driving chip U1 and the light supplement control chip U2 are stopped synchronously, the CPU stops supplying power for the lens driving chip U1, and then the liquid lens enters the sleep mode, and the light supplement lamp is stopped synchronously.
[0029] Further, in order to increase the reliability (voltage stabilization, current limiting, filtering) of the system, other functional electronic components are further included in the circuit of the application, such as: the circuit connected with the power supply and the light supplement control chip U2 is further connected with the ground through the first capacitor C10 and the second capacitor C20 in parallel state, the C1 pin of the light supplement control chip U2 is connected with the ground through the third capacitor C30, the C3 pin of the light supplement control chip U2 is connected with the circuit connected with the power supply and the first resistor R1 is connected in series with the circuit, the C2 pin of the light supplement control chip U2 is connected with the circuit connected with the power supply and the second resistor R2 is connected in series with the circuit, and the B2 pin of the light supplement control chip U2 is further connected with the ground through the third resistor R3.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; 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 application.
Claims
1. An image acquisition control system for a scanning device, 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 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 pins are connected to the CPU, and the camera's exposure pins are connected to the CPU and the fill light control chip, respectively.
2. The image acquisition control system of the scanning device according to claim 1, characterized in that, It also includes a power supply, which is connected to the supplementary lighting control chip.
3. The image acquisition control system of the scanning device 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, pin B2 is connected to the exposure pin of the camera, pins A1 and C1 are grounded, and pins D3 and D1 are connected to a supplementary light.
4. The image acquisition control system of the scanning device according to claim 1, characterized in that, The lens driver chip has 6 pins, with VDD, SDA, and SCL pins connected to the CPU, GND pin grounded, and OUTN and OUTP pins connected to the liquid lens.
5. The image acquisition control system of the scanning device according to claim 2, characterized in that, The circuit connecting the power supply and the supplementary lighting control chip is also grounded through a first capacitor and a second capacitor connected in parallel.
6. The image acquisition control system of the scanning device according to claim 3, characterized in that, The C1 pin of the supplementary lighting control chip is grounded through a third capacitor.
7. The image acquisition control system of the scanning device according to claim 3, 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.
8. The image acquisition control system of the scanning device according to claim 3, 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.
9. The image acquisition control system of the scanning device according to claim 3, characterized in that, The B2 pin of the supplementary lighting control chip is also grounded through a third resistor.