CN202168083U - Photoelectric detecting receiving device with large dynamic range - Google Patents
Photoelectric detecting receiving device with large dynamic range Download PDFInfo
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- CN202168083U CN202168083U CN2011202510693U CN201120251069U CN202168083U CN 202168083 U CN202168083 U CN 202168083U CN 2011202510693 U CN2011202510693 U CN 2011202510693U CN 201120251069 U CN201120251069 U CN 201120251069U CN 202168083 U CN202168083 U CN 202168083U
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Abstract
The utility model relates to a photoelectric detecting receiving device with a large dynamic range. The photoelectric detecting receiving device comprises a receiving lens which is connected with an optical attenuator, an optical detector, a pre-amplification circuit, a filter circuit and a variable gain amplifier in sequence; the variable gain amplifier is respectively connected with a decision circuit and a RSSI (Received Signal Strength Indicator); the optical detector is further connected with a high-voltage power module; and the control circuit is further connected with the optical attenuator, the high-voltage power module, the variable gain amplifier and the RSSI circuit. The photoelectric detecting receiving device has the remarkable advantages that: an optical receiving dynamic range is large and a receiving view field is large in a wireless optical bus system; a weak signal detecting capacity of the receiving device is fully developed; on the basis of the RSSI circuit, the optical attenuator and the like are respectively controlled through a control circuit; a comparator is served as a kernel judging apparatus and a current-limiting resistor; therefore, the dynamic range of the receiving device is effectively expanded.
Description
Technical field
The utility model relates to a kind of great dynamic range photodetection receiving system, especially relates to a kind of great dynamic range photodetection receiving system that is used for the wireless optical bus, belongs to communication technical field.
Background technology
The existing indoor wireless local area network communication technology and agreement are such as bluetooth (Bluetooth) technology, home radio (HomeRF) technology, IEEE802.11 is technological and infrared digital association (IrDA) standard etc.Propose owing to adopting radio-frequency carrier or being directed against special applications, have deficiencies such as band limiting, anti-interference and confidentiality difference.The wireless optical bussing technique has combined the advantage of conventional wireless network and optical fiber communication; Have miniaturization, bandwidth, need not characteristics such as wiring; Show incomparable advantage at aspects such as flexibility, mobility and fail safes, can satisfy the demand of MANET broadband connections in the obturator.And in diffuse transmission type indoor wireless light bus system,, producing intersymbol interference because the emission light signal forms multipath effect after mulitpath arrives receiver, the restriction bus bandwidth can't make full use of light bus bandwidth advantage.
In optical receiver systems, dynamic range is its important indicator.The dynamic range of optical receiver systems is meant that the light-receiving function receives the maximum optical signal of processing and the scope between the minimum light signal.The minimum signal that the light-receiving function receives is the sensitivity of optical receiver.Along with the enhancing of flashlight, surpass the range of linearity of each treatment circuit of optical receiver, produces non-linear, and electric impulse signal generation broadening, the covering follow-up signal influences the detection and the identification of signal when serious.
In the wireless optical bus system; Because the angle of divergence that information source light uses is big; Make that in the use interval range of whole wireless optical bus the intensity of change in optical signal is mainly by the geonetrical attenuation decision, in the use interval range of wireless optical bus; Pairing optical power change scope is very big, therefore needs the dynamic range of expansion receiving system.
Summary of the invention
The purpose of the utility model is; For overcoming the shortcoming of prior art, adapt to big, the big needs in reception visual field of light-receiving dynamic range in the wireless optical bus system, give full play to the weak signal detectivity of receiving system; Provide a kind of on the basis of RSSI circuit; Control optical attenuator, high-voltage power module and variable gain amplifier respectively through control circuit, and the utilization comparator has effectively been expanded the dynamic range of receiving system as the use of core judgement device and current-limiting resistance.
The technical scheme of the utility model is: a kind of great dynamic range photodetection receiving system comprises the reception camera lens; This reception camera lens be linked in sequence successively optical attenuator, photo-detector, pre-amplification circuit, filter circuit, variable gain amplifier; This variable gain amplifier is connected with decision circuit and RSSI circuit respectively; Photo-detector also is connected with high-voltage power module; Said control circuit also is connected with optical attenuator, high-voltage power module, variable gain amplifier and RSSI circuit respectively.
The further technical scheme that on the basis of technique scheme, has additional technical feature is:
Described great dynamic range photodetection receiving system receives camera lens and comprises imaging len, narrow band pass filter, is used to collect flashlight is radiated at photo-detector again through optical attenuator photosurface; The reception visual field of this reception camera lens is 40 °～60 °.
Described great dynamic range photodetection receiving system, described optical attenuator is continuous adjustable optical attenuator, is connected with control circuit, this control circuit is adjusted the attenuation coefficient of optical attenuator continuously.
Described great dynamic range photodetection receiving system, described optical attenuator are the iris diaphgram that is changed by Electric Machine Control, or are continuous gradation optical attenuation sheet, or are adjustable optical attenuator.
Described great dynamic range photodetection receiving system, described photo-detector are Si or InGaAs type photodetector; What be connected with this photo-detector comprises current-limiting resistance, filter capacitor, high-voltage power module.
Described great dynamic range photodetection receiving system, described pre-amplification circuit comprise strides resistance formula amplifying circuit; This pre-amplification circuit converts the photo-detector output current signal into voltage signal, after filter circuit filtering, sends variable gain amplifier to signal is amplified, and signal outputs to decision circuit.
Described great dynamic range photodetection receiving system, described decision circuit comprises a comparator, is the core devices of decision circuit, this comparator is the comparator of narrow pulse width signal light modulation.
Described great dynamic range photodetection receiving system, the modulation rate of the comparator light source of decision circuit is up to 10Mbps, and the light pulse signal pulse-width modulation is 10～50ns magnitude; When light signal was more weak, the decision circuit output pulse signal width that uses comparator to form was identical with light impulse length; When the light signal enhancing, when surpassing the dynamic range of receiving system amplifying circuit, broadening appears in analog signal, and the digital signal broadening of decision circuit 7 outputs is the digital pulse signal of same widths.
Described great dynamic range photodetection receiving system, control circuit also is connected with decision circuit, and control circuit is used for the digital signal that decision circuit is directly imported is carried out decoding processing, and judges the filtering random noise through data frame structure; Control circuit is also controlled optical attenuator, high-voltage power module, variable gain amplifier, and stores the configuration data that optical attenuator operating state, high-voltage power module output voltage values, variable gain amplifier 6 under the usual conditions gain.
Described great dynamic range photodetection receiving system, described control circuit interface in addition that link to each other with external equipment, that be used for data information transfer.
Described great dynamic range photodetection receiving system, its high-voltage power module is set to 5 V～300V through this high-voltage power module output of digital control interface continuous control output voltage amplitude.
The utility model remarkable advantage is: the light-receiving dynamic range is big in the wireless optical bus system, the reception visual field is big; Give full play to the weak signal detectivity of receiving system; Provide a kind of on the basis of RSSI circuit; Control optical attenuator, high-voltage power module and variable gain amplifier respectively through control circuit; And the utilization comparator has effectively been expanded the dynamic range of receiving system as the use of core judgement device and current-limiting resistance.
Description of drawings
Fig. 1 is the great dynamic range photodetection receiving system that is used for the wireless optical bus;
Fig. 2 is the optical detection circuit diagram
Among the figure: 1-reception camera lens, 2-optical attenuator, 3-photo-detector; 4-pre-amplification circuit, 5-filter circuit, 6-variable gain amplifier; 7-decision circuit, 8-RSSI circuit, 9-control circuit; 10-high-voltage power module, 11-filter capacitor, 13-current-limiting resistance.
Embodiment
In conjunction with accompanying drawing and embodiment, the utility model is described further as follows:
Embodiment 1:Like Fig. 1, shown in 2, a kind of great dynamic range photodetection receiving system has the camera lens 1 of reception; This reception camera lens 1 be linked in sequence successively optical attenuator 2, photo-detector 3, pre-amplification circuit 4, filter circuit 5, variable gain amplifier 6; This variable gain amplifier 6 is connected with decision circuit 7 and RSSI circuit 8 respectively; Photo-detector 3 also is connected with high-voltage power module 10; Said control circuit 9 also is connected with optical attenuator 2, high-voltage power module 10, variable gain amplifier 6 and RSSI circuit 8 respectively.As shown in Figure 1; The signal laser of light emitted or by the signal laser after the reflection such as wall; Collect and flashlight converged on the photosurface of photo-detector 3 by receiving camera lens 1, during through the decay of optical attenuator 2, the damping capacity of 2 pairs of light of optical attenuator is by control circuit 9 controls.Described reception camera lens 1 comprises imaging len, narrow band pass filter, is used to collect flashlight is radiated at photo-detector 3 again through optical attenuator 2 photosurface; The reception visual field of this reception camera lens 1 is 40 °～60 °, and the reception visual field that present embodiment receives camera lens 1 is 45 °.Described optical attenuator 2 is continuous adjustable optical attenuator, is connected with control circuit 9, and this control circuit 9 is the attenuation coefficient of adjustment optical attenuator 2 continuously.Described optical attenuator 2 is the iris diaphgram that is changed by Electric Machine Control, or selects continuous gradation optical attenuation sheet, or selects adjustable optical attenuator.Described photo-detector 3 is Si or InGaAs type photodetector, and present embodiment photo-detector 3 is Si type avalanche photodetector, and is as shown in Figure 2, and what be connected with photo-detector 3 comprises current-limiting resistance 13, filter capacitor 11, high-voltage power module 10.The gain of 3 pairs of light signals of this photo-detector is with to be added in photo-detector 3 bias voltage on it relevant: when flashlight is strong; Can reduce the output voltage amplitude of high-voltage power module 10 through control circuit; The adjustment photo-detector is to the gain of flashlight, avoid subsequent conditioning circuit since signal exported strong occur saturated.In addition, high-voltage power module 10 provides bias voltage preceding earlier through current-limiting resistance 13 for photo-detector 3, when light signal is strong; The photoelectric current that flows through on the photo-detector 3 increases; Pressure drop on the current-limiting resistance 13 increases thereupon, and this moment, the actual bias voltage that is added on the photo-detector 3 reduced, and the gain of photo-detector also decreases; Reduce the effect of receiving system gain when playing high light, expand the reception dynamic range of this device.Described pre-amplification circuit 4 comprises strides resistance formula amplifying circuit; Photo-detector 3 is responsible for accomplishing the opto-electronic conversion to flashlight; Amplify in advance by pre-amplification circuit 4 subsequently; Convert photo-detector 3 output current signals into voltage signal, after filter circuit 5 filtering, send variable gain amplifier 6 to signal is amplified to hundreds of mV magnitude, 6 gains of present embodiment variable gain amplifier are set to 40dB; Variable gain amplifier 6 amplifies back output signal and is divided into two-way; One road signal outputs to decision circuit 7, and one the tunnel is input to RSSI circuit 8, and the RSSI circuit is according to the intensity output direct current signal corresponding with signal strength signal intensity of signal; Control circuit 9 obtains the reception signal strength information through AD conversion unit, adjusts the gain of variable gain amplifier 6 as required through D/A conversion unit.Described decision circuit 7 comprises a comparator, is the core devices of decision circuit 7, and this comparator is the comparator of narrow pulse width signal light modulation.The modulation rate of the comparator light source of decision circuit 7 is up to 10Mbps, and the light pulse signal pulse-width modulation is 10～50ns magnitude, and the pulse-width modulation of present embodiment light pulse signal is 25ns; When light signal was more weak, the decision circuit 7 output pulse signal width that use comparator to form were identical with light impulse length; When the light signal enhancing, when surpassing the dynamic range of receiving system amplifying circuit, broadening appears in analog signal, and the digital signal broadening of decision circuit 7 outputs is the digital pulse signal of same widths.If being set to rising edge, triggers subsequent process circuit; Then the broadening of signal does not influence the processing of data; Still can regard receiver as and be in normal operating conditions this moment; Therefore use narrow pulse width signal light modulation techniques and, can in the wireless optical bus system, can play the effect that increases the receiving system dynamic range by the decision circuit that comparator is formed.The control circuit of this receiving system is designed to a pcb board separately, and other artificial circuit part design is on a pcb board, and analog circuit board is placed in the shielding box.Control circuit 9 also is connected with decision circuit 7, and control circuit 9 is used for the digital signal that decision circuit 7 is directly imported is carried out decoding processing, and judges the filtering random noise through data frame structure; Control circuit 9 is also controlled optical attenuator 2, high-voltage power module 10, variable gain amplifier 6, and stores the configuration data that optical attenuator 2 operating states, high-voltage power module 10 output voltage values, variable gain amplifier 6 under the usual conditions gain.Described control circuit 9 interfaces in addition that link to each other with external equipment, that be used for data information transfer.Described high-voltage power module 10 is through digital control interface continuous control output voltage amplitude, and output ripple is less than 50mV, and 10 outputs of present embodiment high-voltage power module are set to 300V.
Embodiment 2:Different with embodiment 1 is: the reception visual field that receives camera lens 1 is 40 °; Optical attenuator 2 is continuous gradation optical attenuation sheet; Photo-detector 3 is an InGaAs type avalanche photodetector; Variable gain amplifier 6 gains are set to 40dB, and the light pulse signal pulse-width modulation is 10ns; High-voltage power module 10 outputs are set to 50V.
Embodiment 3:Different with embodiment 1 is: the reception visual field that receives camera lens 1 is 60 °; Optical attenuator 2 is an adjustable optical attenuator; Photo-detector 3 is an InGaAs type PIN photodetector; Variable gain amplifier 6 gains are set to 20dB, and the light pulse signal pulse-width modulation is 50ns; High-voltage power module 10 outputs are set to 5V.
The claim protection range of the utility model is not limited to the foregoing description.
Claims (10)
1. a great dynamic range photodetection receiving system is characterized in that, comprises receiving camera lens (1); This reception camera lens (1) be linked in sequence successively optical attenuator (2), photo-detector (3), pre-amplification circuit (4), filter circuit (5), variable gain amplifier (6); This variable gain amplifier (6) is connected with decision circuit (7) and RSSI circuit (8) respectively; Photo-detector (3) also is connected with high-voltage power module (10); Said control circuit (9) also is connected with optical attenuator (2), high-voltage power module (10), variable gain amplifier (6) and RSSI circuit (8) respectively.
2. great dynamic range photodetection receiving system according to claim 1; It is characterized in that; Described reception camera lens (1) comprises imaging len, narrow band pass filter, is used to collect flashlight and passes through the photosurface that optical attenuator (2) is radiated at photo-detector (3) again; The reception visual field of this reception camera lens (1) is 40 °～60 °.
3. great dynamic range photodetection receiving system according to claim 1; It is characterized in that; Described optical attenuator (2) is continuous adjustable optical attenuator, is connected with control circuit (9), and this control circuit (9) is adjusted the attenuation coefficient of optical attenuator (2) continuously.
4. great dynamic range photodetection receiving system according to claim 1 is characterized in that, described optical attenuator (2) is the iris diaphgram that is changed by Electric Machine Control, or is continuous gradation optical attenuation sheet, or is adjustable optical attenuator.
5. great dynamic range photodetection receiving system according to claim 1 is characterized in that, described photo-detector (3) is Si or InGaAs type photodetector; What be connected with this photo-detector (3) comprises current-limiting resistance (13), filter capacitor (11), high-voltage power module (10).
6. great dynamic range photodetection receiving system according to claim 1 is characterized in that, described pre-amplification circuit (4) comprises strides resistance formula amplifying circuit; This pre-amplification circuit (4) converts photo-detector (3) output current signal into voltage signal, after filter circuit (5) filtering, sends variable gain amplifier (6) to signal is amplified, and signal outputs to decision circuit (7).
7. great dynamic range photodetection receiving system according to claim 1 is characterized in that described decision circuit (7) comprises a comparator, is the core devices of decision circuit (7), and this comparator is the comparator of narrow pulse width signal light modulation.
8. great dynamic range photodetection receiving system according to claim 7 is characterized in that the modulation rate of the comparator light source of decision circuit (7) is up to 10Mbps, and the light pulse signal pulse-width modulation is 10～50ns magnitude; When light signal was more weak, decision circuit (7) the output pulse signal width that uses comparator to form was identical with light impulse length; When the light signal enhancing, when surpassing the dynamic range of receiving system amplifying circuit, broadening appears in analog signal, and the digital signal broadening of decision circuit (7) output is the digital pulse signal of same widths.
9. great dynamic range photodetection receiving system according to claim 1; It is characterized in that; Control circuit (9) also is connected with decision circuit (7); Control circuit (9) is used for the digital signal that decision circuit (7) is directly imported is carried out decoding processing, and judges the filtering random noise through data frame structure; Control circuit (9) is also controlled optical attenuator (2), high-voltage power module (10), variable gain amplifier (6), and stores the configuration data that optical attenuator (2) operating state, high-voltage power module (10) output voltage values, variable gain amplifier (6) under the usual conditions gain.
10. according to claim 1 or 9 described great dynamic range photodetection receiving systems, it is characterized in that described control circuit (9) interface in addition that link to each other with external equipment, that be used for data information transfer.
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| CN2011202510693U CN202168083U (en) | 2011-07-17 | 2011-07-17 | Photoelectric detecting receiving device with large dynamic range |
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| WO2016206487A1 (en) * | 2015-06-25 | 2016-12-29 | 中兴通讯股份有限公司 | Feedback control circuit and output signal control method for optoelectronic detection apparatus |
| CN107202679A (en) * | 2017-07-17 | 2017-09-26 | 西安工业大学 | A kind of photoelectric integral type test system and photoelectric test method |
| CN108007564A (en) * | 2017-11-17 | 2018-05-08 | 浙江大学 | A kind of Larger Dynamic scope photosignal measuring system and measuring method |
| CN108318132A (en) * | 2018-04-03 | 2018-07-24 | 福建海创光电有限公司 | A kind of device expanding APD linear probing ranges |
| CN109419494A (en) * | 2017-08-30 | 2019-03-05 | 佳能株式会社 | Vltrasonic device |
| CN109768833A (en) * | 2019-03-29 | 2019-05-17 | 武汉邮电科学研究院有限公司 | A kind of method and receiver improving receiver dynamic range |
| CN112532321A (en) * | 2020-11-22 | 2021-03-19 | 湖北久之洋红外系统股份有限公司 | Large dynamic range data communication method of portable laser communication equipment |
| CN112859035A (en) * | 2021-01-13 | 2021-05-28 | 武汉大学 | High dynamic range multi-satellite compatible active laser detector |
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2011
- 2011-07-17 CN CN2011202510693U patent/CN202168083U/en not_active Expired - Lifetime
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| CN107026694A (en) * | 2015-06-25 | 2017-08-08 | 中兴通讯股份有限公司 | A kind of output signal control method of feedback control circuit and Electro-Optical Sensor Set |
| WO2016206487A1 (en) * | 2015-06-25 | 2016-12-29 | 中兴通讯股份有限公司 | Feedback control circuit and output signal control method for optoelectronic detection apparatus |
| CN107202679A (en) * | 2017-07-17 | 2017-09-26 | 西安工业大学 | A kind of photoelectric integral type test system and photoelectric test method |
| CN109419494A (en) * | 2017-08-30 | 2019-03-05 | 佳能株式会社 | Vltrasonic device |
| CN108007564A (en) * | 2017-11-17 | 2018-05-08 | 浙江大学 | A kind of Larger Dynamic scope photosignal measuring system and measuring method |
| CN108318132B (en) * | 2018-04-03 | 2024-02-20 | 福建海创光电技术股份有限公司 | Device for expanding linear detection range of APD |
| CN108318132A (en) * | 2018-04-03 | 2018-07-24 | 福建海创光电有限公司 | A kind of device expanding APD linear probing ranges |
| CN109768833A (en) * | 2019-03-29 | 2019-05-17 | 武汉邮电科学研究院有限公司 | A kind of method and receiver improving receiver dynamic range |
| CN113324650A (en) * | 2020-10-28 | 2021-08-31 | 浙江大学 | Illumination intensity self-adaptive optical receiving end |
| CN112532321A (en) * | 2020-11-22 | 2021-03-19 | 湖北久之洋红外系统股份有限公司 | Large dynamic range data communication method of portable laser communication equipment |
| CN112859035A (en) * | 2021-01-13 | 2021-05-28 | 武汉大学 | High dynamic range multi-satellite compatible active laser detector |
| CN112859035B (en) * | 2021-01-13 | 2023-12-22 | 武汉大学 | High dynamic range multi-satellite compatible active laser detector |
| CN114942067A (en) * | 2022-07-26 | 2022-08-26 | 惟太科技(苏州)有限公司 | Photoelectric amplifier and working method thereof |
| CN114942067B (en) * | 2022-07-26 | 2023-06-23 | 惟太科技(苏州)有限公司 | Photoelectric amplifier and working method thereof |
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Address after: 430074, No. 981 hung Chu street, Hubei, Wuhan Patentee after: Jiuzhiyang Infrared System Co., Ltd. Address before: 430074, No. 981 hung Chu street, Hubei, Wuhan Patentee before: Hubei Jiuzhiyang Infrared System Co., Ltd. |
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Granted publication date: 20120314 |