Signal driving circuit applied to CCD high-speed acquisition

Abstract

The utility model discloses a signal driving circuit applied to CCD high-speed acquisition, and relates to the technical field of CCD driving control. The signal driving circuit comprises a control module, an execution module, a temperature control module and a communication module. Wherein the control module is used for receiving image data of the CCD chip, comparing the image data according to a preset first threshold value and a preset second threshold value, and outputting a driving signal or a circuit breaking signal; the execution module is respectively connected with the CCD chip and the control module and is used for controlling the CCD chip to execute the driving requirement according to the driving signal; the temperature control module is in contact with the CCD chip, is respectively connected with the execution module and the control module, and is used for feeding back temperature data and controlling the CCD chip to stop working according to the circuit break signal; the communication module is connected with the control module and used for transmitting image data and temperature data. According to the utility model, the problem that the current CCD is easy to overheat during use can be solved, and the quality of acquired data is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of CCD drive control, in particular to a signal drive circuit used for CCD high-speed acquisition. Background Art

[0002] CCD image sensor is a high-gain, high-quality image sensor, which is indispensable in high-speed shooting applications. In order to meet the application of high-speed acquisition, it is necessary to provide a high-speed signal to drive the CCD chip. Due to the special structure of CCD, a large amount of heat will be generated when working. Overheating will not only accelerate the aging of components, but also affect the image quality. If the heat is not suppressed well, it is easy to produce noise. Utility Model Content

[0003] The utility model aims to provide a signal driving circuit applied to CCD high-speed acquisition, which can make up for the overheating problem that the current CCD is prone to produce when in use and improve the quality of acquired data.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] A signal driving circuit for CCD high-speed acquisition, comprising:

[0006] A control module, used to receive image data of a CCD chip, sample the temperature of the CCD chip according to a preset first threshold, compare the current temperature data with a preset second threshold, and output a corresponding control signal; the control signal includes a drive signal and a disconnection signal;

[0007] an execution module, connected to the CCD chip and the control module respectively, and arranged between the CCD chip and the control module, and used for controlling the CCD chip to execute the driving requirement according to the driving signal;

[0008] a temperature control module, which is arranged in contact with the CCD chip and is respectively connected to the execution module and the control module, and is used to feed back the detected temperature data of the CCD chip to the control module, and control the CCD chip to stop working according to the disconnection signal;

[0009] The communication module is connected to the control module and is used to transmit the collected image data and current temperature data to a remote receiving end.

[0010] Optionally, an AD converter is further connected between the control module and the CCD chip; the AD converter is used to perform analog-to-digital conversion on the signal output by the CCD chip, and transmit the converted image data to the control module.

[0011] Optionally, the control module specifically includes: a controller, a memory and a timer;

[0012] The controller is respectively connected to the memory, the timer, the execution module, the temperature control module and the communication module;

[0013] The timer is used for counting;

[0014] The controller is used to:

[0015] Receiving image data collected by the CCD chip, and presetting a first threshold and a second threshold;

[0016] Compare the current count with the first threshold, and when the count exceeds the first threshold, compare the temperature data fed back at the current moment with the second threshold, and if the temperature data is less than the second threshold, output a driving signal, and if the temperature data is greater than or equal to the second threshold, output a circuit breaker signal;

[0017] The memory is used to store the image data and the temperature data.

[0018] Optionally, the execution module is composed of a switch module 2-1, a voltage stabilizing circuit 2-2, a power amplitude amplification circuit 2-3, a high-level DC source 2-4 and a low-level DC source 2-5;

[0019] The power amplitude amplification circuit 2-3 is composed of a P-channel field effect transistor and an N-channel field effect transistor. The gates G of the P-channel field effect transistor and the N-channel field effect transistor form two input nodes. The source electrodes S of the P-channel field effect transistor and the N-channel field effect transistor are respectively connected to the high-level DC source 2-4 and the low-level DC source 2-5. The drain electrodes D of the P-channel field effect transistor and the N-channel field effect transistor are short-circuited to form the output end of the CCD vertical timing drive circuit. The power amplitude amplification circuit 2-3 can process one of the high-level DC source 2-4 and the low-level DC source 2-5 and output it to the outside through the output end.

[0020] The voltage stabilizing circuit 2-2 can provide four control signals, two of which correspond to one of the input nodes, and the other two control signals correspond to the other input node;

[0021] The switch module 2-1 uses two single-pole double-throw analog switches, one of which is used to control the input node of the P-channel field effect transistor and the gating of the corresponding two control signals, and the other single-pole double-throw analog switch is used to control the input node of the N-channel field effect transistor and the gating of the corresponding two control signals; when the P-channel field effect transistor is turned on, the N-channel field effect transistor is turned off, and when the N-channel field effect transistor is turned on, the P-channel field effect transistor is turned off, thereby realizing the processing and output of one of the high-level DC source 2-4 and the low-level DC source 2-5.

[0022] Optionally, the temperature control module specifically includes: a temperature sensor and a circuit breaker; the temperature sensor is arranged in contact with the CCD chip and connected to the control module; the circuit breaker is respectively connected to the execution module and the control module.

[0023] Optionally, the communication module adopts a Nikon 4S018-383 communication module.

[0024] According to the specific embodiments provided by the utility model, the utility model discloses the following technical effects:

[0025] The utility model discloses a signal driving circuit for CCD high-speed acquisition, the signal driving circuit includes a control module, an execution module, a temperature control module and a communication module; wherein the control module is used to receive the image data of the CCD chip, and compare according to a preset first threshold value and a second threshold value, and output a driving signal or a disconnection signal; the execution module is respectively connected to the CCD chip and the control module, and is used to control the CCD chip to execute the driving demand according to the driving signal; the temperature control module is contacted with the CCD chip, and is respectively connected to the execution module and the control module, and is used to feedback the temperature data, and control the CCD chip to stop working according to the disconnection signal; the communication module is connected to the control module, and is used to transmit the image data and the temperature data. The utility model can control the signal driving of the CCD according to the temperature, make up for the overheating problem that the current CCD is prone to produce when in use, solve the aging problem of overheating of components, and improve the quality of the collected data. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a schematic diagram of the structure of the signal driving circuit used for CCD high-speed acquisition in the utility model;

[0028] Figure 2 It is a specific implementation circuit diagram of the execution module in this embodiment.

[0029] Figure numerals: 1. control module; 2. execution module; 3. temperature control module; 4. communication module; 5. CCD chip; 6. remote receiving end. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The utility model aims to provide a signal driving circuit applied to CCD high-speed acquisition, which can make up for the overheating problem that the current CCD is prone to produce when in use and improve the quality of acquired data.

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1-Figure 2 As shown, the utility model provides a signal driving circuit for CCD high-speed acquisition, comprising:

[0034] The control module 1 is used to receive the image data of the CCD chip 5, sample the temperature of the CCD chip 5 according to a preset first threshold, compare the current temperature data with a preset second threshold, and output a corresponding control signal; the control signal includes a drive signal and a disconnection signal;

[0035] An execution module 2, connected to the CCD chip 5 and the control module 1 respectively, and arranged between the CCD chip 5 and the control module 1, for controlling the CCD chip 5 to execute the driving demand according to the driving signal;

[0036] The temperature control module 3 is arranged in contact with the CCD chip 5 and is respectively connected to the execution module 2 and the control module 1, and is used to feed back the detected temperature data of the CCD chip 5 to the control module 1, and control the CCD chip 5 to stop working according to the disconnection signal;

[0037] The communication module 4 is connected to the control module 1 and is used to transmit the collected image data and current temperature data to the remote receiving terminal 6 .

[0038] As a specific implementation scheme, an AD converter is also connected between the control module 1 and the CCD chip 5; the AD converter is used to perform analog-to-digital conversion on the signal output by the CCD chip 5, and transmit the converted image data to the control module 1.

[0039] As a specific implementation scheme, the control module 1 specifically includes: a controller, a memory and a timer; the controller is respectively connected to the memory, the timer, the execution module 2, the temperature control module 3 and the communication module 4;

[0040] Among them, the timer is used for counting; the controller is used to: receive image data collected by the CCD chip 5, and preset a first threshold and a second threshold; compare the current count with the first threshold, and when the count exceeds the first threshold, compare the temperature data fed back at the current moment with the second threshold, if the temperature data is less than the second threshold, output a drive signal, if the temperature data is greater than or equal to the second threshold, output a circuit breaker signal; the memory is used to store the image data and the temperature data.

[0041] As a specific implementation scheme, the current finished vertical driving circuit can only meet the driving requirements of a specific type of CCD and cannot be used for other purposes. This vertical driving circuit is not universal, so in production, it is necessary to redesign the driving circuit separately for different types of CCDs. Therefore, in order to drive the CCD to meet different requirements according to actual application conditions, an execution module 2 is constructed, which consists of a switching module 2-1, a voltage stabilizing circuit 2-2, a power amplitude amplification circuit 2-3, a high-level DC source 2-4 and a low-level DC source 2-5.

[0042] The power amplitude amplification circuit 2-3 is composed of a P-channel field effect transistor and an N-channel field effect transistor. The gates G of the P-channel field effect transistor and the N-channel field effect transistor form two input nodes. The sources S of the P-channel field effect transistor and the N-channel field effect transistor are respectively connected to the high-level DC source 2-4 and the low-level DC source 2-5. The drains D of the P-channel field effect transistor and the N-channel field effect transistor are short-circuited to form the output end of the CCD vertical timing drive circuit. The power amplitude amplification circuit 2-3 can process one of the high-level DC source 2-4 and the low-level DC source 2-5 and output it to the outside through the output end.

[0043] The voltage stabilizing circuit 2 - 2 can provide four control signals, two of which correspond to one of the input nodes, and the other two correspond to the other input node.

[0044] The switch module 2-1 uses two single-pole double-throw analog switches, one of which is used to control the input node of the P-channel field effect transistor and the gating of the corresponding two control signals, and the other single-pole double-throw analog switch is used to control the input node of the N-channel field effect transistor and the gating of the corresponding two control signals; when the P-channel field effect transistor is turned on, the N-channel field effect transistor is turned off, and when the N-channel field effect transistor is turned on, the P-channel field effect transistor is turned off, thereby realizing the processing and output of one of the high-level DC source 2-4 and the low-level DC source 2-5.

[0045] The switch module 2-1 is implemented by using MAX333 series chips, and the power amplitude amplifier circuit 2-3 is implemented by using IRF9389 chips. The control end of the switch module 2-1 forms the input end of the CCD vertical timing drive circuit, and the input end of the CCD vertical timing drive circuit is connected to a CCD drive timing generation module. The CCD drive timing generation module can generate the timing pulse required for the CCD to work. The switch module 2-1 controls the conduction and cutoff of the P-channel field effect transistor and the N-channel field effect transistor according to the timing pulse, thereby obtaining the corresponding CCD drive signal.

[0046] In addition, the control end of the switch module 2-12-1 forms the input end of the CCD vertical timing drive circuit. The input end of the CCD vertical timing drive circuit is connected to a CCD drive timing generation module. The CCD drive timing generation module can generate the timing pulses required for the CCD operation. The switch module 2-12-1 controls the conduction and cutoff of the P-channel field effect transistor and the N-channel field effect transistor according to the timing pulses, thereby obtaining the corresponding CCD drive signal.

[0047] As a specific implementation scheme, the temperature control module 3 specifically includes: a temperature sensor and a circuit breaker; the temperature sensor is arranged in contact with the CCD chip 5 and is connected to the control module 1; the input end of the circuit breaker is connected to the output end of the control module 1, and the output end of the circuit breaker is connected to the input end of the execution module 2.

[0048] In this embodiment, the communication module 4 is a Nikon 4S018-383 communication module, which includes serial ports (RS-232, RS-485), Ethernet, Wi-Fi, Bluetooth, Zigbee, etc. to adapt to different communication standards and equipment connection needs; the controller uses a single-chip microcomputer and at least two comparators to implement the above functions, or uses existing commercially available products that can achieve the same or similar functions.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] This article uses specific examples to illustrate the principle and implementation of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A signal driving circuit for CCD high-speed acquisition, characterized in that: include: A control module, used to receive image data of a CCD chip, sample the temperature of the CCD chip according to a preset first threshold, compare the current temperature data with a preset second threshold, and output a corresponding control signal; the control signal includes a drive signal and a disconnection signal; an execution module, connected to the CCD chip and the control module respectively, and arranged between the CCD chip and the control module, and used for controlling the CCD chip to execute the driving requirement according to the driving signal; a temperature control module, which is arranged in contact with the CCD chip and is respectively connected to the execution module and the control module, and is used to feed back the detected temperature data of the CCD chip to the control module, and control the CCD chip to stop working according to the disconnection signal; The communication module is connected to the control module and is used to transmit the collected image data and current temperature data to a remote receiving end.

2. The signal driving circuit for CCD high-speed acquisition according to claim 1, characterized in that: An AD converter is also connected between the control module and the CCD chip; the AD converter is used to perform analog-to-digital conversion on the signal output by the CCD chip and transmit the converted image data to the control module.

3. The signal driving circuit for CCD high-speed acquisition according to claim 1, characterized in that: The control module specifically includes: a controller, a memory and a timer; The controller is respectively connected to the memory, the timer, the execution module, the temperature control module and the communication module; The timer is used for counting; The controller is used to: Receiving image data collected by the CCD chip, and presetting a first threshold and a second threshold; Compare the current count with the first threshold, and when the count exceeds the first threshold, compare the temperature data fed back at the current moment with the second threshold, and if the temperature data is less than the second threshold, output a driving signal, and if the temperature data is greater than or equal to the second threshold, output a circuit breaker signal; The memory is used to store the image data and the temperature data.

4. The signal driving circuit for CCD high-speed acquisition according to claim 1, characterized in that: The execution module is composed of a switch module 2-1, a voltage stabilizing circuit 2-2, a power amplitude amplification circuit 2-3, a high-level DC source 2-4 and a low-level DC source 2-5; The power amplitude amplification circuit 2-3 is composed of a P-channel field effect transistor and an N-channel field effect transistor. The gates G of the P-channel field effect transistor and the N-channel field effect transistor form two input nodes. The source electrodes S of the P-channel field effect transistor and the N-channel field effect transistor are respectively connected to the high-level DC source 2-4 and the low-level DC source 2-5. The drain electrodes D of the P-channel field effect transistor and the N-channel field effect transistor are short-circuited to form the output end of the CCD vertical timing drive circuit. The power amplitude amplification circuit 2-3 can process one of the high-level DC source 2-4 and the low-level DC source 2-5 and output it to the outside through the output end. The voltage stabilizing circuit 2-2 can provide four control signals, two of which correspond to one of the input nodes, and the other two control signals correspond to the other input node; The switch module 2-1 uses two single-pole double-throw analog switches, one of which is used to control the input node of the P-channel field effect transistor and the gating of the corresponding two-way control signals, and the other single-pole double-throw analog switch is used to control the input node of the N-channel field effect transistor and the gating of the corresponding two-way control signals; When the P-channel field effect transistor is turned on, the N-channel field effect transistor is turned off, and when the N-channel field effect transistor is turned on, the P-channel field effect transistor is turned off, thereby processing and outputting one of the high-level DC source 2-4 and the low-level DC source 2-5.

5. The signal driving circuit for CCD high-speed acquisition according to claim 1, characterized in that: The temperature control module specifically includes: a temperature sensor and a circuit breaker; the temperature sensor is arranged in contact with the CCD chip and connected to the control module; the circuit breaker is respectively connected to the execution module and the control module.

6. The signal driving circuit for CCD high-speed acquisition according to claim 1, characterized in that: The communication module adopts Nikon 4S018-383 communication module.

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