CN103033802A - 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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- CN103033802A CN103033802A CN2012105688606A CN201210568860A CN103033802A CN 103033802 A CN103033802 A CN 103033802A CN 2012105688606 A CN2012105688606 A CN 2012105688606A CN 201210568860 A CN201210568860 A CN 201210568860A CN 103033802 A CN103033802 A CN 103033802A
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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 the laser-impulsed radar system, target echo signal intensity and target range, target property are relevant.When pulsed radar carried out the thresholding comparison with fixed threshold, the echo signal amplitude variable effect was differentiated the time, caused the range observation blur level to increase.Exist at present two class processing modes to improve the time delay processing precision, the first is that single pulse waveforms is processed, and the second is that AGC control is processed.The single pulse waveforms processing mode is by suitably processing the time delay decision signal that generation and signal amplitude are irrelevant to echoed signal.This type of exemplary process mode has constant proportion timing method and the differential method, and wherein the constant fraction discriminator method is processed Latest Information, and the differential method is processed local maximum information.If only there is single flex point in pulse signal waveform, two class processing modes all can effectively obtain and the irrelevant echo-pulse precise delay information of amplitude.
But in real system, the 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 guarantees to arrive fixed threshold comparator signal constant amplitude by pulse amplitude information feedback control channel gain, can obtain and the irrelevant echo-pulse precise delay information of amplitude.But when using, the AGC processing mode realizes difficulty in utmost point low duty ratio system and time-sharing system.
Summary of the invention
Technical matters to be solved by this invention provides a kind of laser pulse sounding instrument precise delay treating apparatus, has the accurate characteristics 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, the minimum radius threshold compataror and and logical circuit, sequence timer is used in the continuous sequential of launching two above pulse signals 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 the two-way input signal, one the tunnel is the echoed signal that receiving cable receives, another road is the signal after the echoed signal of receiving cable reception is processed through peak-detector circuit, is used for carrying out time series pulse signal front and back pulse height and compares; Peak-detector circuit is used for the detection pulse amplitude, and keeps certain hour to be used for the succeeding impulse signal amplitude relatively; The minimum radius threshold compataror has the two-way input signal, and one the tunnel is the echoed signal that receiving cable receives, and another road is the minimum radius threshold signal, is used for judging the I acceptance latitude of sequence signal; With logical circuit the two-way input signal is arranged, one tunnel output signal for the threshold compataror that floats, another road is the output signal of minimum threshold comparer, whether exports trigger pip with logical circuit according to input-signal judging, is used for realizing many condition criterions.
Preferably: 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 two or more pulse signals continuously according to specified time interval when transmitting, then receiving cable can receive two or more target echo signals.Because emission duration is little, it is small that target property changes, so suppose constantly, then the 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 the input pulse changes in amplitude, then comparison threshold afterpulsing amplitude is floated, and guarantees that the echoed signal time delay processing is accurate.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the sequential logic synoptic diagram that transmits among the present invention;
Fig. 3 is the sequential logic synoptic diagram of echoed signal among the present invention;
Fig. 4 is the sequential logic synoptic diagram of detection output signal among the present invention;
Fig. 5 is the sequential logic synoptic diagram of unsteady threshold compataror input signal among the present invention;
Fig. 6 is the sequential logic synoptic diagram of unsteady thresholding comparator output signal among the present invention;
Fig. 7 is the sequential logic synoptic diagram of minimum threshold comparator output signal among the present invention;
Fig. 8 be among the present invention with the sequential logic synoptic 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 used for launching continuously two above pulse signals at specified time interval, pulse signal sends through transmission channel, receiving cable is used for receiving echoed signal, unsteady threshold compataror has the two-way input signal, one the tunnel is the echoed signal that receiving cable receives, another road is the signal after the echoed signal of receiving cable reception is processed through peak-detector circuit, is used for carrying out time series pulse signal front and back pulse height and compares; The minimum radius threshold compataror has the two-way input signal, and one the tunnel is the echoed signal that receiving cable receives, and another road is the minimum radius threshold signal, is used for judging the I acceptance latitude of sequence signal; With logical circuit the two-way input signal is arranged, one tunnel output signal for the threshold compataror that floats, another road is the output signal of minimum threshold comparer, whether exports trigger pip with logical circuit according to input-signal judging, is used for realizing many condition criterions.
Described device sends two or more signal pulses continuously according to specified time interval, then receiving cable can receive two or more target echo signals, the sequential logic figure of device as described in being depicted as such as Fig. 2-8, among the figure take two pulse signals of continuous transmission as example.Because emission duration is little, it is small that target property changes, so suppose constantly, then the 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 the input pulse changes in amplitude, then comparison threshold afterpulsing amplitude is floated, and guarantees that the echoed signal time delay processing is accurate.
Wherein the 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; The minimum radius threshold signal determines according to total noise of centrifuge, guarantees that the minimum radius thresholding is higher than total noise of centrifuge, and the 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 is according to selecting interpulse period, makes peak-detector circuit output substantially near about half of input signal peak amplitude.Peak-detector circuit can select to adopt the diode detection circuit, also can adopt high integrated sampling hold circuit.
Used 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.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 prerequisite that does not break away from the principle of the invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (2)
1. 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, the minimum radius threshold compataror and and logical circuit, sequence timer is used in the continuous sequential of launching two above pulse signals 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 the two-way input signal, one the tunnel is the echoed signal that receiving cable receives, another road is the signal after the echoed signal of receiving cable reception is processed through peak-detector circuit, is used for carrying out time series pulse signal front and back pulse height and compares; Peak-detector circuit is used for the detection pulse amplitude, and keeps certain hour to be used for the succeeding impulse signal amplitude relatively; The minimum radius threshold compataror has the two-way input signal, and one the tunnel is the echoed signal that receiving cable receives, and another road is the minimum radius threshold signal, is used for judging the I acceptance latitude of sequence signal; With logical circuit the two-way input signal is arranged, one tunnel output signal for the threshold compataror that floats, another road is the output signal of minimum threshold comparer, whether exports trigger pip with logical circuit according to input-signal judging, is used 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109212544A (en) * | 2018-09-11 | 2019-01-15 | 刘莎 | A kind of target range detection method, apparatus 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 |
| CN112147594A (en) * | 2020-09-27 | 2020-12-29 | 贵州航天电子科技有限公司 | Circuit and method for directional laser fuse signal processing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109212544A (en) * | 2018-09-11 | 2019-01-15 | 刘莎 | A kind of target range detection method, apparatus and system |
| 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 |
| CN112147594A (en) * | 2020-09-27 | 2020-12-29 | 贵州航天电子科技有限公司 | Circuit and method for directional laser fuse signal processing |
| 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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| CN103033802B (en) | 2014-08-06 |
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