CN112432565B - Limited laser coding device - Google Patents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
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Abstract
The invention relates to a limited laser coding device, and belongs to the field of photoelectric signal detection. The device comprises a code receiving module, a code configuration module, a code module and a code sending module which are connected in sequence; the coding receiving module is used for receiving laser coding information including laser coding type, coding length and laser working frequency, verifying the laser coding information and storing the laser coding information into a cache and an internal memory of the coding module; the coding configuration module is used for coding parameter configuration, parameter analysis and hardware configuration; the encoding module is used for generating laser encoding time data according to the configured encoding parameters and the working parameters of the laser and storing the laser encoding time data into a cache and an internal memory; and the coding sending module is used for generating and outputting an electric signal for controlling the laser to work according to the laser coding time data in the coding module cache. The invention solves the problem that the current simple laser coding technology can not meet the requirement of modern war on laser semi-active guided munition.
Description
Technical Field
The invention relates to the field of photoelectric signal detection, in particular to a limited laser coding device.
Background
The laser semi-active guidance system consists of a laser target indicator and a guidance head for laser semi-seeking on a bullet: the laser target indicator emits a coded laser indication signal to the target to be attacked. And the laser semi-seeking seeker on the missile receives laser signals diffusely reflected by the target, and the processor on the missile controls the laser semi-active guided weapon to attack the target according to the received laser indication signals. The hit precision of the laser semi-active guided weapon can reach a meter level generally.
Encoding the laser indication signal is an important technical measure for identifying the target to be attacked and improving the anti-interference capability of the laser semi-active guided weapon. However, with the development of laser warning technology and laser active jamming technology, the current simple laser coding technology can not meet the requirements of modern war on laser semi-active guided weapons.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a limited laser coding device to solve the problem that the current simple laser coding technology cannot meet the requirement of modern war on laser semi-active guided weapons.
The invention is mainly realized by the following technical scheme:
the invention provides a limited laser coding device, which comprises a code receiving module, a code configuration module, a code module and a code sending module which are connected in sequence;
the coding receiving module is used for receiving laser coding information including laser coding type, coding length and laser working frequency, verifying the laser coding information and storing the laser coding information into a cache and an internal memory of the coding module;
the encoding configuration module is used for encoding parameter configuration, parameter analysis and hardware configuration, and specifically includes: reading data of laser coding information in a cache, sequentially analyzing the data of the laser coding information according to the laser coding type, the coding length and the laser working frequency to obtain the working frequency, the repetition period, the emission duration and the signal pattern of a laser, checking the integrity and the accuracy of the analyzed laser coding information, and configuring working parameters of the laser according to the analyzed laser coding information;
the encoding module is used for generating laser encoding time data according to the configured encoding parameters and the working parameters of the laser and storing the laser encoding time data into a cache and an internal memory;
and the coding sending module is used for generating and outputting an electric signal for controlling the laser to work according to the laser coding time data in the coding module cache.
Furthermore, the code receiving module, the code configuration module, the coding module and the code sending module are integrated on the laser coding board;
the limited laser coding device further comprises a debugging port for debugging the laser coding board, and the debugging port is connected with the coding configuration module and is also connected with an external PC (personal computer); the debugging process comprises the following steps: receiving the laser coding time data read by the coding configuration module, and analyzing the read laser coding time data through debugging software on an external PC (personal computer) so as to ensure that the laser coding time data generated by the coding module and used for controlling the laser is correct and complete; the coding module adopts an FPGA chip.
Further, the encoding receiving module receives the laser encoding information sent by the encoding control terminal through a USB interface;
the laser coding board is connected with the power module through the DC power interface to realize +/-5V power supply.
Further, the configured encoding parameters and working parameters include working frequency, repetition period, transmission duration and signal pattern;
the working process of the coding module comprises the following steps:
taking the first laser emission moment as a timing base point, and generating time data of pulse laser output according to different types of laser coding parameters;
and storing the time data output by the pulse laser into a cache of the coding module in a hexadecimal mode according to a format of 4 bytes of each data for standby, and simultaneously inserting a plurality of random interference laser pulse time data into each time data so that the configured coding parameters generate complete laser coding time data.
Further, the different types of laser coding parameters comprise laser coding types and coding lengths;
the code configuration module configures different types of laser coded data according to the analyzed working frequency, repetition period, emission duration and signal pattern of the laser, wherein the different types of laser coded data comprise an accurate frequency code, a 3-8 bit PCM code, a logic function feedback input pseudo-random code and a 3-8 bit finite bit variable interval code.
Further, the complete laser coding data comprises the output time of the pulse laser, each time data is stored in a buffer memory and an internal memory by adopting 4 bytes, and the time precision is 1 microsecond.
Further, the code sending module sends the electric signal for controlling the laser to work to the laser external trigger port through the code output port.
Further, the code sending module comprises a timer and an electronic temperature control circuit, wherein the timer is used for recording the time interval between the subsequent laser pulse and the first laser pulse, and the electronic temperature control circuit is adopted to realize the sending of the high-precision code according to the reference precision of the crystal oscillator; wherein, electron temperature control circuit includes TEC refrigeration piece, negative temperature coefficient's thermistor and current-limiting circuit, and its working process includes: when the temperature of the crystal oscillator rises, the resistance value of the thermistor is reduced, the working current of the TEC refrigerating sheet is increased, the refrigerating capacity is increased, and the current limiting circuit limits the maximum working current of the TEC refrigerating sheet so as to ensure that the temperature of the crystal oscillator cannot drop rapidly in a short time under a high-temperature environment.
Further, when the laser device is controlled to emit laser signals, the code sending module starts a timer and sequentially reads laser code data in the cache, and the time precision of the timer is related to the crystal oscillator device.
Further, when the timing data of the timer is the same as the read laser coding time data, the driving circuit of the coding sending module generates 1 square wave with preset voltage value and pulse width, and sends the square wave to the laser external trigger port through the output port, and correspondingly triggers the laser to emit 1 laser pulse.
The technical scheme has the following beneficial effects: the invention discloses a limited laser coding device, which can control a pulse laser, realize the laser output of a precise frequency code, a 3-8 bit PCM code, a logic function feedback input pseudo-random code and a 3-8 bit limited variable interval code, and can insert sparse or dense random laser interference pulses into codes, wherein the laser coding precision reaches 1 microsecond. The embodiment of the invention can be used for upgrading and reconstructing the current laser semi-active guidance weapon and developing a new generation laser semi-active guidance system.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings, in which like reference numerals refer to like parts throughout, are for the purpose of illustrating particular embodiments only and are not to be considered limiting of the invention.
FIG. 1 is a block diagram of a limited bit laser encoder according to an embodiment of the present invention;
fig. 2 is a front view of a board card of a limited laser encoding device according to an embodiment of the present invention;
fig. 3 is a reverse side view of a board card of a limited laser coding device according to an embodiment of the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
The invention provides a limited laser coding device, aiming at the problem that a simple laser coding technology cannot meet the requirements of modern wars on laser semi-active guided weapons along with the development of a laser warning technology and a laser active interference technology.
Fig. 1 is a block diagram of a limited-bit laser coding apparatus.
Fig. 2 is a front view of a board card of a limited laser coding device.
Fig. 3 is a reverse view of a board card of a limited laser coding device.
Specifically, as shown in fig. 1 in conjunction with fig. 2, the working principle is as follows: the encoding receiving module 2 verifies the accuracy and integrity of the encoding information in the process of receiving the laser encoding information, and ensures that the encoding configuration module 3 can correctly reconstruct the laser encoding information and correctly configure encoding parameters. The coding module 4 generates complete laser coding time data according to the configured coding parameters, the data is the output time of the pulse laser, the time precision is 1 microsecond, and each time data is stored in a cache and a memory by adopting 4 bytes. When the laser is required to be controlled to emit laser signals, the code sending module 5 starts a timer and sequentially reads the laser coded data in the cache. The time precision of the counter is related to the high-precision crystal oscillator, when the timing data is the same as the time of the read laser coding data, a driving circuit of the coding sending module 5 generates 1 square wave with 5V voltage and 2 milliseconds pulse width and outputs the square wave to an external trigger port of the laser, and the laser is triggered to emit 1 laser pulse.
A specific embodiment of the present invention, shown in fig. 2 and fig. 3, discloses a limited laser encoding device, which includes a code receiving module 2, a code configuration module 3, a code module 4, and a code sending module 5, which are connected in sequence;
the code receiving module 2 is used for receiving laser code information including laser code types, code lengths and laser working frequencies, verifying the laser code information and storing the laser code information into a cache and an internal memory of the code module 4;
the encoding configuration module 3 is configured to configure encoding parameters, parse parameters, and configure hardware, and specifically includes: reading data of laser coding information in a cache, sequentially analyzing the data of the laser coding information according to the laser coding type, the coding length and the laser working frequency to obtain the working frequency, the repetition period, the emission duration and the signal pattern of the laser, checking the integrity and the accuracy of the analyzed laser coding information, and configuring working parameters of the laser according to the analyzed laser coding information;
the coding module 4 is used for generating laser coding time data according to the configured coding parameters and the working parameters of the laser and storing the laser coding time data into a cache and an internal memory;
and the code sending module 5 is used for generating and outputting an electric signal for controlling the laser to work according to the laser code time data cached in the code module 4.
Specifically, as shown in fig. 2 and 3, a limited bit laser encoding apparatus includes: the device comprises a power module 1, a code receiving module 2, a code configuration module 3, a code module 4 and a code sending module 5.
As shown in fig. 2, the power module 1 is powered by the DC power interface 6, and the power module outputs ± 5V to supply power to the laser coding board. The coding receiving module 2 receives the laser coding information sent by the coding control terminal through the USB port 7. During the receiving process, the accuracy and integrity of the coding information are verified and stored in the cache and the memory of the coding module 4. And the coding configuration module 3 reads the coding information data cached by the coding module 4 and reconstructs the laser coding information, and configures the coding parameters after reconstruction is completed. The core device of the coding module 4 is 1 FPGA, and the coding module 4 generates laser coding data according to the configured coding parameters and stores the laser coding data in a cache and an internal memory.
As shown in fig. 3, the encoding sending module 5 generates an electrical signal for controlling the laser to operate according to the laser encoded data in the buffer of the encoding module and sends the electrical signal to the laser external trigger port through the encoding output port 8. The coding sending module 5 uses a high-precision crystal oscillator device and an electronic device, and adopts methods such as compensation of an electronic temperature control circuit to realize coding precision.
As shown in fig. 2, the debug port 9 is used for debugging the laser code board.
In a specific embodiment of the present invention, with reference to fig. 2 and fig. 3, the encoding receiving module 2, the encoding configuration module 3, the encoding module 4, and the encoding sending module 5 are integrated on the laser encoding board;
the limited laser coding device further comprises a debugging port 9 for debugging the laser coding board, wherein the debugging port 9 is connected with the coding configuration module 3 and is simultaneously connected with an external PC; the debugging process comprises the following steps: receiving the laser coding time data read by the coding configuration module 3, and analyzing the read laser coding time data through debugging software on an external PC (personal computer) so as to ensure that the laser coding time data generated by the coding module 4 and used for controlling a laser is correct and complete; the coding module 4 adopts an FPGA chip.
In a specific embodiment of the present invention, as shown in fig. 1 and fig. 2, the encoding receiving module 2 receives the laser encoding information sent by the encoding control terminal through the USB interface 7; the laser coding board is connected with the power module 1 through a DC power interface to realize +/-5V power supply.
In a specific embodiment of the present invention, the configured encoding parameters and operating parameters include operating frequency, repetition period, transmission duration, and signal pattern;
as shown in fig. 2, the working process of the encoding module 4 includes:
taking the first laser emission moment as a timing base point, and generating time data of pulse laser output by a coding software program in an FPGA chip according to different types of laser coding parameters and working principles of different types of laser coding;
specifically, for different types of laser codes, calling corresponding coding subprograms installed in the FPGA, wherein the coding processes are respectively as follows:
for the precise frequency code, the time 0 is taken as a time starting point, and the next laser emission time data increases the period increasing time set in the coding information until the period increasing time is not less than the emission time set in the coding information.
For the PCM code, still using the time 0 as the time starting point, increasing the time of the next laser emission time data in 1 cycle period according to the reciprocal of the working frequency set in the coding information, and simultaneously judging whether the time data is modulated and does not emit laser or not according to the set coding, if not, the data is not stored. And after a group of time data is generated in a cycle period, the next group of time data is generated in batch on the basis of the previous group of time data according to the cycle period increase time until the last time data is not less than the transmission time length set in the coding information.
For the pseudo random code with finite bit arbitrary interval, the time 0 is taken as the time starting point, and the next laser emission time data is generated by increasing the time according to the corresponding time interval set in the coding information in 1 cycle period. After a group of time data is generated in a cycle period, the next group of time data is generated in batch according to the cycle period increase time on the basis of the previous group of time data until the last data is not less than the transmission time length set in the coding information.
For the logic function input feedback pseudo random code, firstly, calculating a coded group number according to the reciprocal of the working frequency, the code number and the emission duration set in the coded information, then randomly generating a logic function and generating laser codes of the corresponding group number, carrying out repeatability test on the codes again, if the codes are repeated, randomly generating the logic function and the laser codes again until the generated laser codes are not repeated, and finally, taking the time 0 as a time starting point, generating the next laser emission time data by increasing the time according to the reciprocal of the working frequency set in the coded information, judging whether the time corresponding to the time data is modulated or not according to the generated laser codes in the generation process, if the time is modulated, not emitting the laser, if the time is not emitted, not storing the data until the last data is not less than the emission duration set in the coded information.
And storing the time data output by the pulse laser into a cache of the encoding module 4 in a hexadecimal mode according to a format of 4 bytes of each data for standby, and simultaneously inserting a plurality of random interference laser pulse time data into each time data so that the configured encoding parameters generate complete laser encoding time data.
Specifically, if random disturbance laser pulses are inserted, random data is generated using a random function according to the maximum operating frequency of the laser based on the generated time data. The seed source size of the random function is the time difference between the previous time data and the next time data minus 2 times of the reciprocal of the maximum working frequency of the laser. The time of inserting the random pulse is the previous time data plus the inverse of the maximum operating frequency of the laser and the random data generated by the random function.
In a specific embodiment of the present invention, the different types of laser coding parameters include a laser coding type and a coding length;
as shown in fig. 2, the encoding configuration module 3 configures different types of laser encoding data, including a precise frequency code, a 3-8 bit PCM code, a logic function feedback input pseudo-random code, and a 3-8 bit space-limited code, according to the analyzed operating frequency, repetition period, emission duration, and signal pattern of the laser.
In one embodiment of the present invention, the complete laser coded data includes the output time of the pulsed laser, and each time data is stored in a buffer and a memory by 4 bytes, and the time precision is 1 microsecond.
In a specific embodiment of the present invention, as shown in fig. 3, the code sending module 5 sends the electrical signal for controlling the laser to operate to the laser external trigger port through the code output port.
In a specific embodiment of the present invention, as shown in fig. 3, the encoding and sending module 5 includes a timer and an electronic temperature control circuit, where the timer is used to record the time interval between the subsequent laser pulse and the first laser pulse, and the electronic temperature control circuit is used to implement sending of the high-precision encoding according to the reference precision of the crystal oscillator temperature; wherein, electron temperature control circuit includes TEC refrigeration piece, negative temperature coefficient's thermistor and current-limiting circuit, and its working process includes: when the temperature of the crystal oscillator rises, the resistance value of the thermistor is reduced, the working current of the TEC refrigerating sheet is increased, the refrigerating capacity is increased, and the current limiting circuit limits the maximum working current of the TEC refrigerating sheet so as to ensure that the temperature of the crystal oscillator cannot drop rapidly in a short time under a high-temperature environment.
In a specific embodiment of the present invention, as shown in fig. 3, when the laser is controlled to emit a laser signal, the code sending module 5 starts a timer and sequentially reads laser coded data in the buffer, where the time precision of the timer is related to the crystal oscillator device.
In an embodiment of the present invention, as shown in fig. 3, when the timing data of the timer is the same as the read laser coding time data, the driving circuit of the code sending module 5 generates 1 square wave with preset voltage value and pulse width, and sends the square wave to the laser external trigger port through the output port, and correspondingly triggers the laser to emit 1 laser pulse.
In summary, the present invention discloses a limited laser encoding apparatus, which includes a code receiving module, a code configuring module, a coding module and a code sending module, which are connected in sequence; the coding receiving module is used for receiving laser coding information including laser coding type, coding length and laser working frequency, verifying the laser coding information and storing the laser coding information into a cache and an internal memory of the coding module; the encoding configuration module is used for encoding parameter configuration, parameter analysis and hardware configuration, and specifically includes: reading data of laser coding information in a cache, sequentially analyzing the data of the laser coding information according to the laser coding type, the coding length and the laser working frequency to obtain the working frequency, the repetition period, the emission duration and the signal pattern of the laser, checking the integrity and the accuracy of the analyzed laser coding information, and configuring working parameters of the laser according to the analyzed laser coding information; the encoding module is used for generating laser encoding time data according to the configured encoding parameters and the working parameters of the laser and storing the laser encoding time data into a cache and an internal memory; and the coding sending module is used for generating and outputting an electric signal for controlling the laser to work according to the laser coding time data in the coding module cache. The embodiment of the invention can realize the laser output of the accurate frequency code, the 3-8 bit PCM code, the logic function feedback input pseudo-random code and the 3-8 bit finite variable interval code, and can insert sparse or dense random laser interference pulses into the code, the laser coding precision reaches 1 microsecond, and the requirements of upgrading and transforming the current laser semi-active guided weapon and developing a new generation laser semi-active guided system can be met.
Those skilled in the art will appreciate that all or part of the processes of the methods in the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium, for instructing relevant hardware. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory.
While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (7)
1. A limited laser coding device is characterized by comprising a code receiving module, a code configuration module, a code module and a code sending module which are connected in sequence; the code receiving module, the code configuration module, the code module and the code sending module are integrated on the laser coding board;
the coding receiving module is used for receiving laser coding information including laser coding type, coding length and laser working frequency, verifying the laser coding information and storing the laser coding information into a cache and an internal memory of the coding module;
the encoding configuration module is used for encoding parameter configuration, parameter analysis and hardware configuration, and specifically includes: reading data of laser coding information in a cache, sequentially analyzing the data of the laser coding information according to the laser coding type, the coding length and the laser working frequency to obtain the working frequency, the repetition period, the emission duration and the signal pattern of the laser, checking the integrity and the accuracy of the analyzed laser coding information, and configuring working parameters of the laser according to the analyzed laser coding information; the configured encoding parameters and laser working parameters comprise working frequency, repetition period, emission duration and signal patterns; the code configuration module configures different types of laser coded data according to the analyzed working frequency, repetition period, emission duration and signal pattern of the laser, wherein the different types of laser coded data comprise a precise frequency code, a 3-8 bit PCM code, a logic function feedback input pseudo-random code and a 3-8 bit finite bit variable interval code;
the encoding module is used for generating laser encoding time data according to the configured encoding parameters and the working parameters of the laser and storing the laser encoding time data into a cache and an internal memory; the working process of the coding module comprises the following steps: generating time data of pulse laser output by taking the first laser emission time as a timing base point according to different types of laser coding parameters; storing the time data output by the pulse laser into a cache of the coding module in a hexadecimal mode according to a format of 4 bytes of each data for standby, and simultaneously inserting a plurality of random interference laser pulse time data into each time data to enable the configured coding parameters to generate complete laser coding time data;
the different types of laser coding parameters comprise laser coding types and coding lengths;
the coding sending module is used for generating and outputting an electric signal for controlling the laser to work according to the laser coding time data in the coding module cache;
the limited laser coding device further comprises a debugging port for debugging the laser coding board, and the debugging port is connected with the coding configuration module and is simultaneously connected with an external PC; the debugging process comprises the following steps: receiving the laser coding time data read by the coding configuration module, and analyzing the read laser coding time data through debugging software on an external PC (personal computer) so as to ensure that the laser coding time data generated by the coding module and used for controlling the laser is correct and complete; the coding module adopts an FPGA chip.
2. The device of claim 1, wherein the encoding receiving module receives the laser encoding information sent by an encoding control terminal through a USB interface;
the laser coding board is connected with the power module through the DC power interface to realize +/-5V power supply.
3. The apparatus of claim 1, wherein the complete laser encoded time data comprises the output time of the pulsed laser, each time data is stored in a buffer and memory using 4 bytes with a time accuracy of 1 microsecond.
4. The apparatus of claim 1, wherein the code sending module sends the electrical signal for controlling the laser operation to an off-laser trigger port through a code output port.
5. The device according to claim 4, wherein the code sending module comprises a timer and an electronic temperature control circuit, the timer is used for recording the time interval between the subsequent laser pulse and the first laser pulse, and the electronic temperature control circuit is used for sending the high-precision code according to the reference precision of the crystal oscillator; wherein, electron temperature control circuit includes TEC refrigeration piece, negative temperature coefficient's thermistor and current-limiting circuit, and its working process includes: when the temperature of the crystal oscillator rises, the resistance value of the thermistor is reduced, the working current of the TEC refrigerating sheet is increased, the refrigerating capacity is increased, and the current limiting circuit limits the maximum working current of the TEC refrigerating sheet so as to ensure that the temperature of the crystal oscillator cannot be rapidly reduced in a short time in a high-temperature environment.
6. The apparatus according to claim 5, wherein when the laser is controlled to emit the laser signal, the code sending module starts a timer and sequentially reads the laser coded data in the buffer, and the time precision of the timer is related to the crystal oscillator device.
7. The device of claim 5, wherein when the timing data of the timer is the same as the read laser coding time data, the driving circuit of the code sending module generates 1 square wave with preset voltage value and pulse width, and sends the square wave to the laser external trigger port through the output port, and correspondingly triggers the laser to emit 1 laser pulse.
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