CN103532528A - Pulse time discrimination device - Google Patents
Pulse time discrimination device Download PDFInfo
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- CN103532528A CN103532528A CN201310431631.4A CN201310431631A CN103532528A CN 103532528 A CN103532528 A CN 103532528A CN 201310431631 A CN201310431631 A CN 201310431631A CN 103532528 A CN103532528 A CN 103532528A
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Abstract
The invention discloses a pulse time discrimination device. The pulse time discrimination device comprises a bipolar pulse former and a double-threshold zero-passage time discriminator, which are connected with each other, wherein the bipolar pulse former consists of a pulse resonator and a pulse amplifier, which are connected in sequence; a unipolar pulse signal excites the pulse resonator to generate attenuation oscillation so as to form a bipolar pulse signal; by using a zero-passage time point of the bipolar pulse signal as pulse time information, the pulse amplifier only linearly amplifies an amplitude signal nearby a zero-passage point; the double-threshold zero-passage time discriminator comprises a zero-passage comparator, a pre-discriminator, a monostable circuit and the like, which are connected in sequence. The pulse time discrimination device is simple in structure, low in cost and convenient and reliable to use, and can be applied to pulse time discrimination of measuring instruments such as nuclear physics and high-precision laser pulse distance measuring instruments.
Description
Technical field
The present invention relates to a kind of pulse and constantly screen device, espespecially when pulse amplitude has larger variation, carry out the accurate pulse of measuring of pulse timing and constantly screen device.
Background technology
Existing pulse constantly discriminating method mainly contains forward position discrimination method, constant ratio discrimination method and zero passage moment discrimination method constantly, forward position constantly discrimination method is to determine pulse characteristics moment point by fixed threshold mode, the intensity in pulse front edge of usining equals moment that the point of set threshold value arrives as pulse characteristics moment point, but this method is subject to the impact of pulse amplitude autokinetic effect, and measure error is larger.And the basic principle of constant ratio discrimination method is to extract moment that in rising edge of a pulse, 1 high point arrives as pulse characteristics moment point, but be subject to the impact of autokinetic effect pulse rise time, still have larger measure error.Zero passage constantly discrimination method is to utilize high pass to hold resistance filter unipolar pulse signal is transformed to double polarity pulse signal, using the zero crossing of bipolar pulse as feature moment point, due to sort circuit structure be first pulse signal is amplified after again by high pass hold resistance filtering be shaped to bipolar pulse, although the timing error being caused by pulse amplitude variations is very little, but require signal to carry out linear amplification without distortion, therefore need to carry out automatic gain control to signal, increase the complexity of receiving system and produced extra timing error.
For this reason, design that theory structure is simple, high accuracy pulse constantly discriminator circuit be the task of top priority, be also the difficult point of current innovative design.
Summary of the invention
Described in background technology, the object of the present invention is to provide a kind of paired pulses pulse moment discriminator circuit that characteristic point is carried out accurately measurement constantly, after its impulse hunting, amplification and dual threashold zero-cossing discriminator, obtain accurate pulse characteristic point constantly, circuit structure is simple, reliable.
To achieve these goals, the present invention is achieved through the following technical solutions:
Device is screened in a kind of pulse constantly, comprise interconnective bipolar pulse former and dual threashold zero passage discriminator constantly, wherein, described bipolar pulse former is comprised of the pulse resonance device and the pulse amplifier that connect successively, unipolar pulse signal driving pulse resonator produces attenuated oscillation, form double polarity pulse signal, by the zero passage moment point of double polarity pulse signal, as pulse time information, described pulse amplifier only carries out the amplitude signal of near zero-crossing point linearity amplification; Described dual threashold zero passage constantly discriminator comprises the zero-crossing comparator connecting successively, pre-discriminator, monostable circuit etc.
Owing to having adopted technique scheme, tool of the present invention has the following advantages and effect:
1, the resonator that the present invention encourages by ranging pulse carrys out moulding double polarity pulse signal, and the impact that the zero crossing of its double polarity pulse signal is not changed by peak value of pulse, make to reach good certainty of measurement, and subsequent treatment software and hardware is very simple;
2, the principle of the invention is simple in structure, and cost is low, and working service is repaired simple and easy, and the pulse being especially suitable as in nuclear physics instrument and high-precision laser pulse ranging system is screened constantly.
Accompanying drawing explanation
Fig. 1 is structure collectivity schematic diagram of the present invention;
Fig. 2 is RLC bipolar pulse forming circuit principle schematic of the present invention;
Fig. 3 is the present invention's rlc circuit waveform schematic diagram under different amplitudes.
Embodiment
By Fig. 1, illustrated, device is screened in a kind of pulse constantly, mainly bipolar pulse former and dual threashold zero passage moment discriminator, consists of, and wherein bipolar pulse former is comprised of pulse resonance device and pulse amplifier; Wherein dual threashold zero passage moment discriminator is partly comprised of zero-crossing comparator, pre-discriminator, monostable circuit etc.Unipolar pulse signal driving pulse resonator produces attenuated oscillation, forms double polarity pulse signal, by the zero passage moment point of double polarity pulse signal as pulse time information.Wherein, pre-discriminator is for fear of noise or interference signal, to cause the false triggering of zero-crossing comparator.
An embodiment who is shown bipolar pulse former structure of the present invention by Fig. 2, is comprised of the oscillator forming with RLC parallel resonator and AC amplifier.
Know again, by Fig. 1, illustrated, by electric capacity
with the amplifying circuit of amplifier composition, because the double polarity pulse signal after being shaped passes through electric capacity
be coupled to amplifier, therefore, as long as the amplitude signal of near zero-crossing point is carried out to linearity to be amplified, just can guarantee that discriminator circuit can accurately extract time information constantly.
By Fig. 3, show the present invention's rlc circuit waveform under the different amplitudes of bipolar pulse former, output voltage under underdamping condition
solution in time domain is:
In formula:
for attenuation coefficient;
for attenuated oscillation frequency;
,
represent forced response component coefficient;
represent intrinsic response component coefficient.
For the bipolar pulse that is shaped, and reduce the impact of input pulse parameter on zero crossing, need to meet two conditions: the first, meet underdamping condition, meet
, to guarantee that RLC parallel circuits produces vibration; The second, the attenuation coefficient of forced response component
be greater than intrinsic response component attenuation coefficient
, and the width of input pulse (is about
) be less than attenuated oscillation frequency
, before arriving with the zero crossing of the bipolar pulse that guarantees to be shaped, forced response component attenuates.Therefore we choose unipolar pulse signal peak time
,
,
,
, can calculate and equal respectively 40,50 as input current amplitude A ..., 100 o'clock, by unipolar pulse electric current
the output voltage that excitation produces
, as shown in Figure 3.Can find out: although input unipolar pulse electric current
amplitude
difference, but output voltage
at synchronization
zero passage, that is to say, the zero crossing of the double polarity pulse signal after moulding
irrelevant with the amplitude of input signal, thereby eliminated the impact of signal amplitude variation on timing accuracy.
Claims (2)
1. device is screened in a pulse constantly, it is characterized in that: described device comprises interconnective bipolar pulse former and dual threashold zero passage discriminator constantly, wherein, described bipolar pulse former is comprised of the pulse resonance device and the pulse amplifier that connect successively, unipolar pulse signal driving pulse resonator produces attenuated oscillation, form double polarity pulse signal, by the zero passage moment point of double polarity pulse signal, as pulse time information, described pulse amplifier only carries out the amplitude signal of near zero-crossing point linearity and amplifies; Described dual threashold zero passage constantly discriminator comprises the zero-crossing comparator connecting successively, pre-discriminator, monostable circuit etc.
2. device is screened in pulse according to claim 1 constantly, it is characterized in that: described pulse resonance device consists of RLC parallel resonator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431631.4A CN103532528A (en) | 2013-09-22 | 2013-09-22 | Pulse time discrimination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431631.4A CN103532528A (en) | 2013-09-22 | 2013-09-22 | Pulse time discrimination device |
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| Publication Number | Publication Date |
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| CN103532528A true CN103532528A (en) | 2014-01-22 |
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ID=49934271
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|---|---|---|---|
| CN201310431631.4A Pending CN103532528A (en) | 2013-09-22 | 2013-09-22 | Pulse time discrimination device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873053A (en) * | 2014-02-27 | 2014-06-18 | 广西电网公司电力科学研究院 | Lightening induction damped oscillation wave generator for onboard equipment |
| CN105141294A (en) * | 2015-08-17 | 2015-12-09 | 西北核技术研究所 | Dual-preset discrimination gating constant fraction discriminator and digital constant fraction discrimination method |
| CN112255661A (en) * | 2020-10-16 | 2021-01-22 | 李立君 | Digital nuclear pulse triggering system |
| CN117491745A (en) * | 2024-01-02 | 2024-02-02 | 中国科学技术大学 | Pulse signal time and charge measurement method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2489345Y (en) * | 2000-12-26 | 2002-05-01 | 中国科学院高能物理研究所 | Gamma-ray discriminator |
| US7595667B2 (en) * | 2006-06-09 | 2009-09-29 | Mitsubishi Electric Corporation | Drive circuit |
-
2013
- 2013-09-22 CN CN201310431631.4A patent/CN103532528A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2489345Y (en) * | 2000-12-26 | 2002-05-01 | 中国科学院高能物理研究所 | Gamma-ray discriminator |
| US7595667B2 (en) * | 2006-06-09 | 2009-09-29 | Mitsubishi Electric Corporation | Drive circuit |
Non-Patent Citations (1)
| Title |
|---|
| 黄民双等: "基于共振的激光脉冲飞行时间测距时刻探测技术", 《核电子学与探测技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873053A (en) * | 2014-02-27 | 2014-06-18 | 广西电网公司电力科学研究院 | Lightening induction damped oscillation wave generator for onboard equipment |
| CN105141294A (en) * | 2015-08-17 | 2015-12-09 | 西北核技术研究所 | Dual-preset discrimination gating constant fraction discriminator and digital constant fraction discrimination method |
| CN105141294B (en) * | 2015-08-17 | 2018-03-30 | 西北核技术研究所 | Double preset examination door-control type constant fraction discriminator discriminators and digital constant fraction discriminator discriminating method |
| CN112255661A (en) * | 2020-10-16 | 2021-01-22 | 李立君 | Digital nuclear pulse triggering system |
| CN117491745A (en) * | 2024-01-02 | 2024-02-02 | 中国科学技术大学 | Pulse signal time and charge measurement method and device |
| CN117491745B (en) * | 2024-01-02 | 2024-05-17 | 中国科学技术大学 | Pulse signal time and charge measurement method and device |
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Application publication date: 20140122 |
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