CN103033802B - Precise time delay processing device of laser pulse echo detecting instrument - Google Patents
Precise time delay processing device of laser pulse echo detecting instrument Download PDFInfo
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- CN103033802B CN103033802B CN201210568860.6A CN201210568860A CN103033802B CN 103033802 B CN103033802 B CN 103033802B CN 201210568860 A CN201210568860 A CN 201210568860A CN 103033802 B CN103033802 B CN 103033802B
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Abstract
The invention discloses a precise time delay processing device of a laser pulse echo detecting instrument and relates to the technical field of pulse echo detecting instruments. The time delay processing device continuously sends two or a plurality of pulse signals according to a special time interval when emitting signals, and two or a plurality of target echo signals are received by a receiving channel. Due to the fact that time of an emitting interval is short and change of target emission characteristics is little, the target emission characteristics can be assumed to be not changed, and waveforms and amplitudes of the front and the back echo pulse signals are both consistent. A peak detecting circuit is designed by a receiving unit, and detection voltage is formed by a first echo pulse signal through the peak detecting circuit. The detection voltage is used as a comparative threshold of a subsequent signal after being processed. Due to the fact that detection signals change along change of input pulse amplitudes, the comparative threshold floats along the pulse amplitudes, and accurate time delay processing of the echo signals is ensured.
Description
Technical field
The present invention relates to pulse echo sniffer technical field, relate in particular to a kind of laser pulse sounding instrument precise delay treating apparatus.
Background technology
At pulsed radar particularly in laser-impulsed radar system, target echo signal intensity and target range, target property are relevant.In the time that pulsed radar carries out thresholding comparison with fixed threshold, echo signal amplitude variable effect is differentiated the time, causes range observation blur level to increase.Exist at present two class processing modes to improve time delay processing precision, the first is single pulse waveforms processing, and the second is that AGC controls processing.Single pulse waveforms processing mode, by echoed signal is suitably processed, produces and the irrelevant time delay decision signal of signal amplitude.This type of exemplary process mode has constant proportion timing method and the differential method, and wherein constant fraction discriminator method is processed Latest Information, and the differential method is processed local maximum information.If pulse signal waveform only exists single flex point, two class processing modes all can effectively obtain the echo-pulse precise delay information irrelevant with amplitude.
But in real system, echoed signal waveform with transmit, target property etc. is directly related, limited the application of this type of processing mode.The utilization of AGC control mode, by pulse amplitude information feedback control channel gain, ensures to arrive fixed threshold comparator signal constant amplitude, can obtain the echo-pulse precise delay information irrelevant with amplitude.But when applying in utmost point low duty ratio system and time-sharing system, AGC processing mode realizes difficulty.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of laser pulse sounding instrument precise delay treating apparatus, has the accurate feature of the echoed signal Delay of judgement.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of laser pulse sounding instrument precise delay treating apparatus, it is characterized in that comprising transmitter unit and receiving element, transmitter unit comprises sequence timer and transmission channel, receiving element comprises receiving cable, peak-detector circuit, threshold compataror floats, minimum radius threshold compataror and and logical circuit, sequence timer is used in the continuous sequential of launching more than two pulse signal and controlling described device of specified time interval, pulse signal sends through transmission channel, receiving cable is used for receiving echoed signal, unsteady threshold compataror has two-way input signal, one tunnel is the echoed signal that receiving cable receives, another road is the echoed signal process peak-detector circuit signal after treatment that receiving cable receives, be used for carrying out the pulse height comparison of time series pulse signal front and back, peak-detector circuit is used for detection pulse amplitude, and keeps certain hour to be used for the comparison of succeeding impulse signal amplitude, minimum radius threshold compataror has two-way input signal, and a road is the echoed signal that receiving cable receives, and another road is minimum radius threshold signal, for judging the I acceptance latitude of sequence signal, have two-way input signal with logical circuit, a road is the output signal of unsteady threshold compataror, and another road is the output signal of minimum threshold comparer, whether exports trigger pip with logical circuit according to input-signal judging, for realizing many condition criterions.
Preferred: the value detecting circuit signal retention time is less than the pulse train time interval.
The beneficial effect that adopts technique scheme to produce is: described time delay processing device sends continuously two or more pulse signals according to specified time interval in the time transmitting, and receiving cable can receive two or more target echo signals.Because emission duration is little, target property changes small, so suppose constantly, echo pulse signal waveform is all consistent with amplitude.Receiving element design peak-detector circuit, first echo pulse signal forms detecting circuit through peak-detector circuit, and this detecting circuit is after treatment as the comparison threshold of follow-up signal.Because rectified signal changes with input pulse changes in amplitude, comparison threshold afterpulsing amplitude is floated, and ensures that echoed signal time delay processing is accurate.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the sequential logic schematic diagram transmitting in the present invention;
Fig. 3 is the sequential logic schematic diagram of echoed signal in the present invention;
Fig. 4 is the sequential logic schematic diagram of detection output signal in the present invention;
Fig. 5 is the sequential logic schematic diagram of unsteady threshold compataror input signal in the present invention;
Fig. 6 is the sequential logic schematic diagram of unsteady thresholding comparator output signal in the present invention;
Fig. 7 is the sequential logic schematic diagram of minimum threshold comparator output signal in the present invention;
Fig. 8 be in the present invention with the sequential logic schematic diagram of the trigger output signal of logical circuit.
Embodiment
As shown in Figure 1, a kind of laser pulse sounding instrument precise delay treating apparatus, comprise transmitter unit and receiving element, transmitter unit comprises sequence timer and transmission channel, and receiving element comprises receiving cable, peak-detector circuit, threshold compataror, minimum radius threshold compataror and and logical circuit float.
Sequence timer is for launching continuously more than two pulse signal at specified time interval, pulse signal sends through transmission channel, receiving cable is used for receiving echoed signal, unsteady threshold compataror has two-way input signal, one tunnel is the echoed signal that receiving cable receives, another road is the echoed signal process peak-detector circuit signal after treatment that receiving cable receives, for carrying out the pulse height comparison of time series pulse signal front and back; Minimum radius threshold compataror has two-way input signal, and a road is the echoed signal that receiving cable receives, and another road is minimum radius threshold signal, for judging the I acceptance latitude of sequence signal; Have two-way input signal with logical circuit, a road is the output signal of unsteady threshold compataror, and another road is the output signal of minimum threshold comparer, whether exports trigger pip with logical circuit according to input-signal judging, for realizing many condition criterions.
Described device sends two or more signal pulses continuously according to specified time interval, receiving cable can receive two or more target echo signals, as Fig. 2-8 be depicted as described in device sequential logic figure, in figure to send continuously two pulse signals as example.Because emission duration is little, target property changes small, so suppose constantly, echo pulse signal waveform is all consistent with amplitude.Receiving element design peak-detector circuit, first echo pulse signal forms detecting circuit through peak-detector circuit, and this detecting circuit is after treatment as the comparison threshold of follow-up signal.Because rectified signal changes with input pulse changes in amplitude, comparison threshold afterpulsing amplitude is floated, and ensures that echoed signal time delay processing is accurate.
Wherein transponder pulse circuit for generating is realized the sequential control of complete machine; Receiving cable is transformed to pulse signal receiving signal; Peak-detector circuit is realized the amplitude detection of pulse, and its output is as the unsteady thresholding input of the threshold compataror that floats; Minimum radius threshold signal determines according to total noise of centrifuge, ensures that minimum radius thresholding is higher than total noise of centrifuge, and minimum radius threshold circuit produces in order to prevent false-alarm.The peak-detector circuit signal retention time is less than the pulse train time interval.
Pulse interval is selected according to complete machine work schedule and radiating circuit performance, and the peak-detector circuit retention time, according to selecting interpulse period, makes peak-detector circuit output substantially approach the half left and right of input signal peak amplitude.Peak-detector circuit can select to adopt diode detection circuit, also can adopt high integrated sampling hold circuit.
Applied specific case herein principle of the present invention and embodiment thereof are set forth, the explanation of above embodiment is just with helping understand method of the present invention and core concept thereof.It should be pointed out that for the person of ordinary skill of the art, can also carry out some improvement and modification to the present invention under the premise without departing from the principles of the invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (2)
1. a laser pulse sounding instrument precise delay treating apparatus, comprise transmitter unit and receiving element, transmitter unit comprises time sequential pulse transmitter and transmission channel, receiving element comprises receiving cable and peak-detector circuit, it is characterized in that: described receiving element also comprises unsteady threshold compataror, minimum radius threshold compataror and and logical circuit, sequence timer is used in the continuous sequential of launching more than two pulse signal and controlling described device of specified time interval, pulse signal sends through transmission channel, receiving cable is used for receiving echoed signal, unsteady threshold compataror has two-way input signal, one tunnel is the echoed signal that receiving cable receives, another road is the echoed signal process peak-detector circuit signal after treatment that receiving cable receives, be used for carrying out the pulse height comparison of time series pulse signal front and back, peak-detector circuit is used for detection pulse amplitude, and keeps certain hour to be used for the comparison of succeeding impulse signal amplitude, minimum radius threshold compataror has two-way input signal, and a road is the echoed signal that receiving cable receives, and another road is minimum radius threshold signal, for judging the I acceptance latitude of sequence signal, have two-way input signal with logical circuit, a road is the output signal of unsteady threshold compataror, and another road is the output signal of minimum radius threshold compataror, whether exports trigger pip with logical circuit according to input-signal judging, for realizing many condition criterions.
2. a kind of laser pulse sounding instrument precise delay treating apparatus according to claim 1, is characterized in that the peak-detector circuit signal retention time is less than the pulse train time interval.
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| CN201210568860.6A CN103033802B (en) | 2012-12-25 | 2012-12-25 | Precise time delay processing device of laser pulse echo detecting instrument |
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| CN201210568860.6A CN103033802B (en) | 2012-12-25 | 2012-12-25 | Precise time delay processing device of laser pulse echo detecting instrument |
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| CN105589061A (en) * | 2015-12-11 | 2016-05-18 | 无锡市雷华科技有限公司 | Signal processing algorithm for shore-based radar |
| CN109212544B (en) * | 2018-09-11 | 2021-06-22 | 深圳市前海腾际创新科技有限公司 | Target distance detection method, device and system |
| CN109597057A (en) * | 2018-12-06 | 2019-04-09 | 苏州镭图光电科技有限公司 | A kind of return laser beam distance measuring method and range unit |
| CN112147594B (en) * | 2020-09-27 | 2024-04-19 | 贵州航天电子科技有限公司 | Circuit and method for processing directional laser fuze signal |
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| JPH10197635A (en) * | 1997-01-13 | 1998-07-31 | Omron Corp | Laser distance measuring equipment |
| CN2356355Y (en) * | 1998-11-10 | 1999-12-29 | 华中理工大学 | Ultrasonic distance measurer |
| DE10025968A1 (en) * | 2000-05-25 | 2001-07-12 | Daimler Chrysler Ag | Distance determining method by the echo delay time principle, involves comparing received transmitted signal component with a first threshold value and with a second threshold value, exceeding the first |
| JP2010159986A (en) * | 2009-01-06 | 2010-07-22 | Yamatake Corp | Photoelectric sensor device |
| JP5602554B2 (en) * | 2010-09-21 | 2014-10-08 | 日本信号株式会社 | Optical distance measuring device |
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