CN101118181A - Diapason resonant vibration type episcotister - Google Patents
Diapason resonant vibration type episcotister Download PDFInfo
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- CN101118181A CN101118181A CNA2007100183498A CN200710018349A CN101118181A CN 101118181 A CN101118181 A CN 101118181A CN A2007100183498 A CNA2007100183498 A CN A2007100183498A CN 200710018349 A CN200710018349 A CN 200710018349A CN 101118181 A CN101118181 A CN 101118181A
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- tuning fork
- electromagnetic drive
- output
- episcotister
- diapason
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Abstract
The present invention discloses a tuning fork resonant type light chopper, which comprises a bottom seat, wherein two electromagnetic drive coils arranged oppositely, and a tuning fork positioned between two electromagnetic drive coils are arranged on the bottom seat, two top ends of the tuning fork are respectively arranged with a light shielding piece, and the output end of an oscillating circuit is connected with the electromagnetic drive coil. The drive of the tuning fork of the present invention is established under the stimulation of the oscillating circuit, the electromagnetic drive coil not only is the component part of the oscillating circuit, but also provides oscillating energy for the tuning fork. The present invention is a mechanical-electrical integration structure, thereby ensuring that the reference frequency provided by the oscillating circuit and the chopping frequency is completely consistent, and the intrinsic resonant frequency of the tuning fork is the light modulation frequency. The energy consumption of the present invention is low, the efficiency is high, the service life is long, and the chopping precision is stable.
Description
Technical field
The present invention relates to a kind of optic modulating device, particularly relate to a kind of diapason resonant vibration type episcotister that is mainly used in Feebleness Light Signal Examining.
Background technology
When carrying out atomic weak optical signal detecting, will carry out optical modulation for the influence that overcomes bias light, present mechanical chopper both domestic and external adopts motor to drag dial rotation mostly and finishes the optical modulation (see figure 3).Among Fig. 3, motor 9 drives rotating disk 8 and rotates, take out motor 9 tach signals by sampler 10 and send motor servo circuit 11 to, after comparing, motor servo circuit 11 adjusts motor 9 speeds by control circuit 12, just chopped off the formation pulsed light beam when laser instrument 6 sends continuous light beam by rotating disk, received by receiving trap 7.Because of being subjected to condition influence such as motor speed, voltage, the chopping the light precision is difficult to stablize, and rotating disc type chopper complex structure, volume is big, energy consumption is high, and there is mechanical wear in mechanical chopper, and the life-span is short, so application is restricted.
Summary of the invention
The objective of the invention is at above-mentioned the deficiencies in the prior art, provide a kind of simple in structure, volume is little, and energy consumption is low, efficient height, the diapason resonant vibration type episcotister of life-span length and chopping the light stable accuracy.
For achieving the above object, the technical solution adopted in the present invention is: a kind of diapason resonant vibration type episcotister, comprise base, it is characterized in that: two Electromagnetic Drive coils that are oppositely arranged and the tuning fork between two Electromagnetic Drive coils are installed on the described base, two tops of tuning fork are installed with an anti-dazzling screen respectively, and the output terminal of oscillatory circuit is connected with the Electromagnetic Drive coil.
The present invention compared with prior art has the following advantages: the driving of tuning fork of the present invention is based upon under the excitation of oscillatory circuit, and the Electromagnetic Drive coil is the ingredient of oscillatory circuit, provides oscillation energy to tuning fork again; Electromechanical integrated structure of the present invention has guaranteed that reference voltage and chopper frequency that oscillatory circuit provides are in full accord, and the natural resonance frequency of tuning fork promptly is the frequency of optical modulation, so energy consumption of the present invention is low, efficient height, long and chopping the light stable accuracy of life-span.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a course of work synoptic diagram of the present invention.
Fig. 3 is the structural representation of traditional mechanical chopper.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
A kind of diapason resonant vibration type episcotister as shown in Figure 1, comprise base 1, two Electromagnetic Drive coils 3 that are oppositely arranged and the tuning fork 2 between two Electromagnetic Drive coils 3 are installed on the described base 1, described tuning fork 2 is made by alloy steel, two tops of tuning fork 2 are installed with an anti-dazzling screen 4 respectively, and the output terminal of oscillatory circuit 5 is connected with Electromagnetic Drive coil 3.Wherein oscillatory circuit 5 is integrated, and it provides the frequency and the drive current of tuning fork 2 resonance in chopper, and can provide one the road and the on all four reference frequency of chopper frequency use for demodulation comparison.Described oscillatory circuit 5 comprises power-supply filter 5-7, filtering is after voltage stabilizer 5-1 output termination self-excited oscillator 5-2, the output of self-excited oscillator 5-2 divides three the tunnel, wherein two-way is connected with No. two prime amplifier 5-5 with a prime amplifier 5-4 respectively, other one the tunnel meets oscillator signal reshaper 5-3 and arrive vibration reference signal output port 5-8 after shaping, the output of a prime amplifier 5-4 connects Electromagnetic Drive coil 3 through an output amplifier 5-9, No. two prime amplifier 5-5 are connected with self-excited oscillator 5-2 through sampler 5-6 through another output that No. two output amplifier 5-10 meet 3, numbers output amplifier 5-9 of Electromagnetic Drive coil.
As shown in Figure 1, the exciting current that Electromagnetic Drive coil 3 provides by oscillatory circuit 5 drives tuning fork 2 shakes, and Electromagnetic Drive coil 3 is the important component part of oscillatory circuit 5 here, is again the supplier who drives tuning fork 2 float force.Tuning fork 2 special physical dimension determine oscillation frequency, and under the effect of external force, it can be by its natural mode shape starting of oscillation.Anti-dazzling screen 4 is fixed on two tops of tuning fork 2, and after tuning fork 2 starting of oscillations, tuning fork 2 back and forth shake drives anti-dazzling screen 4 to-and-fro movements, does not stop to interdict the light that continuous light source sends by the natural frequency of tuning fork 2, finishes the modulation to light.
As shown in Figure 2, power supply at first gives oscillatory circuit 5 power supplies, after the energising, oscillating current drives tuning fork 2 vibrations by two Electromagnetic Drive coils 3, tuning fork 2 drives anti-dazzling screens 4 motions, and ceaselessly blocking comes from the continuous light beam that laser instrument 6 is sent, and the to-and-fro movement by anti-dazzling screen 4 converts pulsed light beam to, finished the mechanical modulation to light signal, modulating frequency is the resonance frequency of tuning fork 2.Receiving trap 7 converts light signal to electric signal.
Claims (3)
1. diapason resonant vibration type episcotister, comprise base (1), it is characterized in that: two Electromagnetic Drive coils (3) that are oppositely arranged are installed on the described base (1) and are positioned at tuning fork (2) between the two Electromagnetic Drive coils (3), two tops of tuning fork (2) are installed with an anti-dazzling screen (4) respectively, and the output terminal of oscillatory circuit (5) is connected with Electromagnetic Drive coil (3).
2. diapason resonant vibration type episcotister according to claim 1, it is characterized in that: described oscillatory circuit (5) comprises power-supply filter (5-7), voltage stabilizer (5-1), voltage stabilizer (5-1) output termination self-excited oscillator (5-2), the output of self-excited oscillator (5-2) divides three the tunnel, wherein two-way is connected with No. two prime amplifiers (5-5) with a prime amplifier (5-4) respectively, other one the tunnel connects oscillator signal reshaper (5-3) and arrive vibration reference signal output terminal (5-8) after shaping, the output of a prime amplifier (5-4) connects Electromagnetic Drive coil (3) through an output amplifier (5-9), No. two prime amplifiers (5-5) connect Electromagnetic Drive coil (3) through No. two output amplifiers (5-10), and another output of an output amplifier (5-9) is connected with self-excited oscillator (5-2) through sampler (5-6).
3. diapason resonant vibration type episcotister according to claim 1 is characterized in that: described tuning fork (2) is made by alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100183498A CN101118181A (en) | 2007-07-26 | 2007-07-26 | Diapason resonant vibration type episcotister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100183498A CN101118181A (en) | 2007-07-26 | 2007-07-26 | Diapason resonant vibration type episcotister |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101118181A true CN101118181A (en) | 2008-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100183498A Pending CN101118181A (en) | 2007-07-26 | 2007-07-26 | Diapason resonant vibration type episcotister |
Country Status (1)
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| CN (1) | CN101118181A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398783A (en) * | 2013-08-08 | 2013-11-20 | 上海理工大学 | Optical modulation device for electrical calibration pyroelectric radiometer, and control method thereof |
| CN103399400A (en) * | 2013-08-08 | 2013-11-20 | 上海理工大学 | Light cutting device for optical chopper and controlling method thereof |
| CN109541990A (en) * | 2018-10-26 | 2019-03-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of resonant electromagnetism tuning fork chopper auto gain control method |
| CN109541991A (en) * | 2018-10-26 | 2019-03-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of resonant electromagnetism tuning fork chopper AGC system |
-
2007
- 2007-07-26 CN CNA2007100183498A patent/CN101118181A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398783A (en) * | 2013-08-08 | 2013-11-20 | 上海理工大学 | Optical modulation device for electrical calibration pyroelectric radiometer, and control method thereof |
| CN103399400A (en) * | 2013-08-08 | 2013-11-20 | 上海理工大学 | Light cutting device for optical chopper and controlling method thereof |
| CN103399400B (en) * | 2013-08-08 | 2015-06-10 | 上海理工大学 | Light cutting device for optical chopper and controlling method thereof |
| CN109541990A (en) * | 2018-10-26 | 2019-03-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of resonant electromagnetism tuning fork chopper auto gain control method |
| CN109541991A (en) * | 2018-10-26 | 2019-03-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of resonant electromagnetism tuning fork chopper AGC system |
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Open date: 20080206 |