CN106154815A - Split-second precision TT&C system for the field of finding range - Google Patents
Split-second precision TT&C system for the field of finding range Download PDFInfo
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- CN106154815A CN106154815A CN201610596928.XA CN201610596928A CN106154815A CN 106154815 A CN106154815 A CN 106154815A CN 201610596928 A CN201610596928 A CN 201610596928A CN 106154815 A CN106154815 A CN 106154815A
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
- G04F10/005—Time-to-digital converters [TDC]
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
- G04F10/04—Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Power Engineering (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
For the split-second precision TT&C system in the field of finding range, belong to precise time measuring technical field.The present invention is to solve the problem that existing high precision time interval measurement equipment volume is huge and measures poor universality.Its code-disc impulsive measurement module is for the pulse number of sampling grating encoder；Motor control module adjusts the angle position of motor for the pulse number obtaining according to code-disc impulsive measurement module samples, and then adjusts laser transmitter projects angle；Sequential generation module triggers, for producing under the control of Logic control module, the delay pulse that laser pickoff is opened；Time interval measurement module is for measuring from the time interval detecting that the outer triggering signal of generating laser is opened to laser pickoff under the control of Logic control module；GPS time service module adds time tag for utilizing satellite time transfer under the control of Logic control module to often organizing corresponding measurement data.The present invention is used for split-second precision observing and controlling.
Description
Technical field
The present invention relates to the split-second precision TT&C system for the field of finding range, belong to precise time measuring technical field.
Background technology
Time interval measurement technology suffers from application widely in modern scientific research and engineering practice, its development
Process be also related to the development of the national economy and national defense construction always, especially play significant role in military field.Therefore, generation
Various countries of boundary just start to greatly develop this technology, U.S. PTTI(Precise Time and Time Interval very early) year
Can carry out seminar to time interval measurement technology every year, this technology has been classified as country by NAS must be big
One of science and technology of power development.This technology is led in fundamental physics research, national defense and military, commercial Application, telecommunication path, positioning
Multiple fields such as boat and accurate measurement play requisite important function.With the development of every profession and trade, for this skill
Art proposes increasingly higher requirement, the index such as the high accuracy of time interval measurement technology, wide range, multichannel, high stability
It is badly in need of improving.Therefore, the Research Significance for high-precision time-interval measurement technique is great.
Current China mostly uses and carries out high-precision time interval measurement from the external professional horological device introduced, these
Equipment is often bulky, expensive and very flexible, it is difficult to be customized according to specific needs.
Content of the invention
The invention aims to solve that existing high precision time interval measurement equipment volume is huge and measurement poor universality
Problem, provide a kind of split-second precision TT&C system for the field of finding range.
Split-second precision TT&C system for the field of finding range of the present invention, this TT&C system is for generating laser
The laser pulse signal sending measures, and the transmitting angle of generating laser is controlled by motor；It includes logic control
Molding block, sequential generation module, time interval measurement module, GPS time service module, motor control module and code-disc impulsive measurement mould
Block,
Code-disc impulsive measurement module for Logic control module control down-sampling grating encoder pulse number to determine
The current location information of the generating laser of motor control；Grating encoder is for measuring the positional information of motor；
Motor control module is for the pulse obtaining according to code-disc impulsive measurement module samples under the control of Logic control module
Number adjusts the angle position of motor, and then adjusts laser transmitter projects angle；
Sequential generation module triggers, for producing under the control of Logic control module, the delay pulse that laser pickoff is opened；With
When according to adjacent front time interval measurement module obtain from detecting the outer triggering signal of generating laser to laser
The time interval that receiver is opened adjusts the time producing delay pulse；
Time interval measurement module is touched for the outside measured under the control of Logic control module from generating laser being detected
Send signals to the time interval that laser pickoff is opened；
GPS time service module is added to often organizing corresponding measurement data for utilizing satellite time transfer under the control of Logic control module
Time tag.
Module, crystal oscillator module and selection switch module when time interval measurement module includes that power module, TDC survey,
Power module is for providing working power for time interval measurement module；
When TDC surveys, module uses two panels TDC chip parallel measurement, for carrying out data with Logic control module by interface bus
Transmission；
When crystal oscillator module is for surveying for TDC, module provides reference input clock；
When selecting switch module for surveying for TDC, module provides trigger when surveying.
GPS time service module uses Big Dipper BD-126 module to carry out positioning time service, Big Dipper BD-126 module and logic control mould
Serial port module within block uses serial communication transmission time data bag；Logic control module utilizes its internal clocking and the Big Dipper
The whole pps pulse per second signal that BD-126 module sends forms internal timer module.
Motor control module includes secondary control system, grating encoder and LCDs,
Secondary control system passes through transfering data by serial communication with Logic control module, and secondary control system is used for controlling motor and rotates,
The pulse number of sampling grating encoder, determines motor initial position, and controls motor on the basis of initial position, and left and right is positive and negative
Turn 30 degree；LCDs is used for showing motor speed and shows motor position information.
Advantages of the present invention: the present invention, for the high accuracy chronometer time measurement in field of finding range, has certainty of measurement height, surveys
The advantages such as weight range is big, volume is little, cost performance is high, flexibility is strong.Its sequential generation module is for real-time control delay pulse
Time of origin and pulse width, it, for controlling the unlatching of laser pickoff, utilizes Logic control module FPGA internal clocking, real
Existing nanosecond accurate delay.Time interval measurement module is for measuring laser pulse from the time interval being transmitted into return, optional
With the TDC-GPX chip of ACAM company of Germany, according to required certainty of measurement and scope, G-pattern is used to measure, design
Chip periphery hardware circuit and relevant software programs.GPS time service module utilizes Big Dipper BD-126 module to carry out positioning time service, per second
Send time data bag by serial ports, and utilize Logic control module FPGA internal clocking to realize timer to reach Microsecond grade
Required precision.Motor and code-disc control control use the output pulse of STM32 single-chip microcomputer accurate sampling grating encoder, and capture is touched
Send out pulse signal, control the rotation of motor according to sampling pulse, including the speed of electric machine rotation and angle.The present invention can basis
Different application demands is customized, and has stronger flexibility.
Brief description
Fig. 1 is the theory diagram of the split-second precision TT&C system for the field of finding range of the present invention；
Fig. 2 is the inside theory diagram of time interval measurement module；
Fig. 3 is the Principle of Communication block diagram of GPS time service module and Logic control module；
Fig. 4 is the theory diagram of motor control module.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described below in conjunction with Fig. 1 to Fig. 4, is used for finding range described in present embodiment
The split-second precision TT&C system in field, this TT&C system is surveyed for the laser pulse signal sending generating laser
Amount, the transmitting angle of generating laser is controlled by motor；When the 2nd, it include Logic control module the 1st, sequential generation module
Interval measurement module the 3rd, GPS time service module the 4th, motor control module 5 and code-disc impulsive measurement module 6,
Code-disc impulsive measurement module 6 for the pulse number of the control down-sampling grating encoder at Logic control module 1 with really
Determine the current location information of the generating laser of motor control；Grating encoder is for measuring the positional information of motor；
Motor control module 5 is for the arteries and veins of acquisition of sampling according to code-disc impulsive measurement module 6 under the control of Logic control module 1
Rush number and adjust the angle position of motor, and then adjust laser transmitter projects angle；
Sequential generation module 2 triggers, for producing under the control of Logic control module 1, the delay pulse that laser pickoff is opened；
Simultaneously according to an adjacent front time interval measurement module 3 obtain from detecting the outer triggering signal of generating laser to swashing
The time interval that optical receiver is opened adjusts the time producing delay pulse；
Time interval measurement module 3 is for measuring from outside generating laser being detected under the control of Logic control module 1
The time interval that trigger is opened to laser pickoff；
GPS time service module 4 is for utilizing satellite time transfer to add to often organizing corresponding measurement data under the control of Logic control module 1
Add time tag.
Module 3-2, crystal oscillator module 3-3 and selection switch when time interval measurement module 3 includes that power module 3-1, TDC survey
Module 3-4,
Power module 3-1 is for providing working power for time interval measurement module 3；
When TDC surveys, module 3-2 uses two panels TDC chip parallel measurement, for being carried out by interface bus with Logic control module 1
Data are transmitted；
When crystal oscillator module 3-3 is for surveying for TDC, module 3-2 provides reference input clock；
When selecting switch module 3-4 for surveying for TDC, module 3-2 provides trigger when surveying.
GPS time service module 4 uses Big Dipper BD-126 module 4-1 to carry out positioning time service, Big Dipper BD-126 module 4-1 and logic
Serial port module 1-1 within control module 1 uses serial communication transmission time data bag；Logic control module 1 utilizes inside it
The whole pps pulse per second signal that clock and Big Dipper BD-126 module 4-1 send forms internal timer module 1-2.
Motor control module 5 includes secondary control system 5-1, grating encoder 5-2 and LCDs 5-3,
Secondary control system 5-1 passes through transfering data by serial communication with Logic control module 1, and secondary control system 5-1 is used for controlling electricity
Machine rotates, and the pulse number of sampling grating encoder 5-2 determines motor initial position, and controls motor with initial position as base
Standard, left and right rotating 30 degree；LCDs 5-3 is used for showing motor speed and shows motor position information.
Logic control module 1, for coordinating the resource that each module is used, is responsible at the communication between each module and data
Reason, and communicate with host computer；Sequential generation module 2 is mainly responsible for producing the delay pulse triggering receiver unlatching, and
The time of origin of delay pulse can be adjusted according to the time of measurement time interval measurement module 3 last time in real time so that receiver
Can accurately receive return signal；Sequential generation module 2 realizes that the resolution ratio of pulse is 10ns, and time range is 100us.When
Interval measurement module 3 is mainly used in measuring from the precise time interval detecting that outer triggering signal is opened to receiver,
Asking certainty of measurement to reach picosecond level, the order of accuarcy of this measurement data directly affects the range performance of system.System of the present invention
System index request finding range is more than 5 kms, so area requirement reaches 100us during the survey of time interval measurement module, with
Optical pulse reflected signal may return many groups simultaneously, it requires and can carry out multi-channel measurement.The present invention uses two panels TDC simultaneously
The data result of measurement is averaged by row measurement, for reducing the shake of chronometric data；Realize that time measurement resolution is 40ps,
Measurement scope is 100us, and the measurement data linearity is good, and measurement time jitter is less than 100ps.Time interval measurement module 3 is measured
Resolution ratio reaches as high as 10ps, and is suitable for the application of integrated system；Logic control module FPGA is used to complete and TDC-GPX
Between communication, TDC-GPX is connected on FPGA as an ancillary equipment, by read and write TDC-GPX internal register control
Make its work.GPS time service module 4 is mainly responsible for utilizing satellite time transfer to add time tag to often group measurement data, it is simple to follow-up
The process of data, the time service precision of GPS reaches the microsecond order of magnitude.Motor control module 5 is mainly responsible in ranging process adjusting
Angles and positions with measurement generating laser.
Sequential generation module 2 utilizes the internal 100M clock of FPGA, it is achieved that nanosecond accurate delay, produces delay pulse
Width was directly proportional to the FPGA clock cycle, utilizes Vivado Software for Design delays time to control IP kernel, is mounted to by AXI bus
On arm processor, build FPGA necessary hardware platform.Register read/write function is utilized to complete on arm processor to time delay arteries and veins
Rush the control of time of origin and pulse width.Arm processor can regulate the work of receiver in real time according to the time interval gathering
Make the time so that laser pickoff can receive return signal accurately.Utilize the peripheral control interface that arm processor is abundant
The control peripheral hardware such as motor and code-disc, can adjust the transmitting angle of generating laser in real time.
Seeing Fig. 3, GPS time service module 4 utilizes serial port module 1-1 that time data bag is transferred to FPGA, simultaneously in order to completely
The requirement of foot Microsecond grade time service precision, utilizes the internal meter of whole pps pulse per second signal design that the internal clocking of FPGA and BD-126 send
When device module.
In Fig. 4, Logic control module 1 is master control system, and STM32f103RB is as secondary control system 5-1 sampling grating
Encoder 5-2 simultaneously controls servomotor.Grating encoder 5-2 uses the TONIC product of Reinshaw company, and the driving of motor uses
The MBDHDHT2510E of Panasonic, LCDs 5-3 are serial ports display screen.Secondary control system 5-1 of STM32 and logic control mould
Block 1 passes through serial communication, and Logic control module 1 triggers STM32 by pulse signal and starts working.STM32 Single-chip Controlling electricity
Machine rotation is turned around, and finds zero point, i.e. initial position, then as requested, the pulse number of sampling grating encoder 5-2, control
Motor on the basis of zero point, left and right rotating 30 degree.When there being Logic control module 1 control signal, secondary control system 5-1 is to patrolling
Collect control module 1 and report motor position, and deviate the angle of zero point with LCDs display motor.
In Fig. 2, the split-second precision measurement chip TDC-GPX that when TDC surveys, module 3-2 uses ACAM company of Germany to release enters
When row is surveyed, its Measurement Resolution reaches as high as 10ps, and is suitable for the application of integrated system；FPGA is used to complete and TDC-
Communication between GPX, TDC-GPX is connected on FPGA as an ancillary equipment, by reading and writing the internal register of TDC-GPX
Control its work.Power module 3-1 divides three parts, and external 12V power supply is changed into 5V to module bulk supply by Part I, and second
5V is changed into 3.3V and powers to I/O by part VDDO/H power module, and Part III VDDC-H/O power module is to TDC core, firmly
Part macroelement and oscillator unit are powered.The 12V voltage using LM7805 module to provide FPGA is converted to 5V；Use three ends
5V voltage is converted to 3.3V by voltage-stablizer LM1117-3.3, provides VDDO/H power supply, uses Schottky diode to be depressured Vddc
Obtaining Vddo, VDDO/H voltage is mainly used to power to I/O；Three terminal regulator LM1117-ADJ is used to be converted to 5V voltage
VDDC-H/O, Vddc power supply is that TDC core is powered, Vddc-o and Vddc-h power supply is respectively TDC chip internal oscillator unit
With hardware macroelement module for power supply.The precision of TDC-GPX is to be determined by internal logic gate propagation delay, it and temperature, voltage
Relevant with manufacturing process.And its impact on precision is uncertain, it is necessary to drawn by calibration calculations.Therefore TDC-GPX
Precision is simultaneously unstable, can swing with the change of voltage and temperature.The present invention uses TDC-GPX precision adjustable mode, utilizes
The phase place of phaselocked loop output adjusts VDDC-H/O, and to compensate the impact on time difference method for the temperature, therefore certainty of measurement is fixed on
One adjustable numerically.When TDC surveys the interface bus of module 3-2 and FPGA be divided into control line, address wire, data wire and
Flag signal line.Wherein 28 position datawires can be with transmitted in both directions, and bits per inch needs the exclusion ground connection by 10K to play guarantor according to line
The effect protected.Crystal oscillator module 3-3 uses the active crystal oscillator of 40M as reference input clock, and it is phase-locked that this clock is supplied to chip internal
Ring Phase Locke d Loop, the core voltage of phase lock control TDC-GPX chip is to ensure the steady of this chip certainty of measurement
Qualitative.Owing to the frequency stability of crystal oscillator directly affects precision when chip is surveyed, it requires that the short-term stability of crystal oscillator is less than
1ppm.Signal TStart when selecting switch module 3-4 design to survey, Tstop1 ~ Tstop8 can pass through FPGA and external circuit two
The mode of kind triggers.Can be selected by switch, put F and represent that input signal is provided by FPGA, put O and represent input signal by outward
Portion's circuit provides, and external circuit uses SMA interface.Meanwhile, ALU and OEN signal also adds enable switch, puts U and represents enable, puts
N represents non-enable.
Claims (4)
1. the split-second precision TT&C system for field of finding range, this TT&C system is for swashing of sending generating laser
Light pulse signal measures, and the transmitting angle of generating laser is controlled by motor；It is characterized in that, it includes logic
Control module (1), sequential generation module (2), time interval measurement module (3), GPS time service module (4), motor control module
(5) and code-disc impulsive measurement module (6),
Code-disc impulsive measurement module (6) is for the pulse number of the control down-sampling grating encoder at Logic control module (1)
To determine the current location information of the generating laser of motor control；Grating encoder is for measuring the positional information of motor；
Motor control module (5) obtains for sampling according to code-disc impulsive measurement module (6) under the control of Logic control module (1)
The pulse number obtaining adjusts the angle position of motor, and then adjusts laser transmitter projects angle；
Sequential generation module (2) triggers, for producing under the control at Logic control module (1), the time delay that laser pickoff is opened
Pulse；Simultaneously according to an adjacent front time interval measurement module (3) obtain from external trigger generating laser being detected
Signal adjusts the time producing delay pulse to the time interval that laser pickoff is opened；
Time interval measurement module (3) is for measuring from generating laser being detected the control of Logic control module (1) is lower
The time interval that outer triggering signal is opened to laser pickoff；
GPS time service module (4) for utilize under the control of Logic control module (1) satellite time transfer to often organize corresponding measurement number
According to interpolation time tag.
2. the split-second precision TT&C system for the field of finding range according to claim 1, it is characterised in that time interval
Module (3-2), crystal oscillator module (3-3) and selection switch module (3-when measurement module (3) includes that power module (3-1), TDC survey
4),
Power module (3-1) is for providing working power for time interval measurement module (3)；
When TDC surveys, module (3-2) uses two panels TDC chip parallel measurement, for passing through interface bus with Logic control module (1)
Carry out data transmission；
When crystal oscillator module (3-3) is for surveying for TDC, module (3-2) provides reference input clock；
When selecting switch module (3-4) for surveying for TDC, module (3-2) provides trigger when surveying.
3. the split-second precision TT&C system for the field of finding range according to claim 1 and 2, it is characterised in that GPS awards
When module (4) use Big Dipper BD-126 module (4-1) to carry out positioning time service, Big Dipper BD-126 module (4-1) and logic control mould
The internal serial port module (1-1) of block (1) uses serial communication transmission time data bag；Logic control module (1) utilizes inside it
The whole pps pulse per second signal that clock and Big Dipper BD-126 module (4-1) send forms internal timer module (1-2).
4. the split-second precision TT&C system for the field of finding range according to claim 3, it is characterised in that motor controls
Module (5) includes secondary control system (5-1), grating encoder (5-2) and LCDs (5-3),
Secondary control system (5-1) passes through transfering data by serial communication with Logic control module (1), and secondary control system (5-1) is used for
Control motor rotates, and the pulse number of sampling grating encoder (5-2) determines motor initial position, and controls motor with initially
On the basis of position, left and right rotating 30 degree；LCDs (5-3) is used for showing motor speed and shows motor position information.
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| CN114074476A (en) * | 2020-08-12 | 2022-02-22 | 森大（深圳）技术有限公司 | Method, device, equipment and medium for calibrating code disc in Onepass printing system |
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| CN114074476B (en) * | 2020-08-12 | 2023-02-21 | 森大（深圳）技术有限公司 | Method, device, equipment and medium for calibrating code disc in Onepass printing system |
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