WO1997007593A1 - Procede d'exploitation du signal de sortie d'un capteur ou d'un convertisseur recevant une energie impulsionnelle intermittente, et dispositif de mise en oeuvre - Google Patents
Procede d'exploitation du signal de sortie d'un capteur ou d'un convertisseur recevant une energie impulsionnelle intermittente, et dispositif de mise en oeuvre Download PDFInfo
- Publication number
- WO1997007593A1 WO1997007593A1 PCT/FR1996/001240 FR9601240W WO9707593A1 WO 1997007593 A1 WO1997007593 A1 WO 1997007593A1 FR 9601240 W FR9601240 W FR 9601240W WO 9707593 A1 WO9707593 A1 WO 9707593A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- output
- converter
- circuit
- bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
Definitions
- the present invention relates to a method for exploiting the output signal of a sensor or converter receiving intermittent pulse energy, and to an implementation device.
- a sensor such as a photodetector coupled to an optical fiber receives a train of optical pulses, it translates them into electrical pulses.
- the average value of these electrical pulses is not constant. It is linked on the one hand to the occurrence (cadence) and to the levels of the different optical pulses received and, on the other hand, it fluctuates according to the dark current, variable characteristic of the photodetector (according to the temperature especially).
- These electrical pulses restored by the opto-electric conversion element therefore have an offset value (continuous component) which is not stable during the phase of reception of the physical information. The risk being the non-detection of one or more useful optical pulses of low level arriving at the sensor with as a consequence the loss of logical information.
- optical pulses emitted by equipment close to the receiving equipment have a level sufficient to be easily exploited by the receiving equipment while those emitted by remote equipment have a lower level, and when the difference between extreme levels reaches or exceeds 24 dB, the weakest optical pulses arriving immediately after high level pulses may not be taken into account, as specified above. The converse also applies for higher optical pulses arriving immediately after low level pulses.
- the present invention relates to a method allowing in a pulse energy receiving system to take into account low level pulses, and in particular the first of them, arriving immediately after a train of high level pulses and vice versa. . It concerns the capacity of the receiving system to take these different levels into account relatively for pulses successive and absolutely with respect to the variable continuous component of the physical information received.
- the present invention also relates to a device for implementing such a method, a device which is simple, reliable and faithfully reproduces reproducible logical information from the reception scenarios.
- the method according to the invention is characterized in that during the reception of the energy, the electrical pulses coming from the sensor or converter are normally restored, and that outside the periods of reception of the energy, one s 'slaves to a value determined according to the output level of the sensor.
- the determined value corresponds to the output level of the sensor or converter in the absence of reception.
- This device therefore has two operating phases: the first offset compensation phase, in particular at power-up and during periods of bus inactivity.
- the second phase of acquisition by sampling of the physical information received, of analysis and restitution.
- the device according to the invention comprises at the output of the sensor or converter a circuit for controlling the output voltage of this sensor or converter.
- FIG. 1 is a block diagram of a device for pulse acquisition and offset correction according to the invention
- FIG. 2 is a block diagram of one of the circuits of the device in FIG. 1,
- - Figure 3 is a block diagram of an offset control circuit of the device of Figure 1, in a digital version
- - Figure 4 is the block diagram of a simplified, analog version of the circuit offset control device of Figure 1.
- the present invention is described below with reference to an optical / electrical converter connected to an optical, multiplex bus such as the ARINC 629 bus, but it is understood that it is not limited to such an application, and that '' it can be implemented in many areas in which a sensor or a converter (for example a pulse transformer) receiving intermittent pulse energy, in particular at variable level, transforms it into electrical signals, the secondary of the sensor or converter being electrically isolated from the energy source.
- a sensor or a converter for example a pulse transformer
- the device 1 shown in FIG. 1 receives light energy from an optical fiber 2, converted into electrical energy by an opto ⁇ electronic sensor 3 (PIN photodiode for example).
- This sensor 3 is connected to a circuit 4 of the transimpedance type (current / voltage conversion).
- the output of circuit 4 is connected to the input "+" of an adder 5, the output of which is connected to the analog input of an analog-digital converter 6, which is advantageously of the "Flash" type.
- the output of the converter 6 is connected to a set of circuits 7 for analyzing the received signals and restoring the clock signal, as well as to a set of circuits 8 for controlling the offset of reception.
- the output of the assembly 8 is connected by a digital-analog converter 9 to the input "-" of the adder 5.
- the circuits 6, 7 and 8 receive a clock signal called, in a standard way, "RICKT ".
- Circuit sets 7 and 8 receive the following standardized signals: “RXE” ("Reception enable”), “RXCK” (reception clock signal), and circuit set 7 produces the standardized signals: “RXI” ( Manchester logic reception signal), “RXN” ("Manchester logic reverse reception signal”), as well as the signal “ERR” (Error detection signal see figure 2).
- RXE Transmission enable
- RXCK reception clock signal
- circuit set 7 produces the standardized signals: “RXI” ( Manchester logic reception signal), “RXN” (“Manchester logic reverse reception signal”), as well as the signal “ERR” (Error detection signal see figure 2).
- RXI Manchester logic reception signal
- RXN Manchester logic reverse reception signal
- ERP Error detection signal see figure 2
- the assembly 7 comprises, at its input, a circuit 10 for shaping the signals received from the converter 6.
- the signals taken from the bus 2 come from several sources located at different distances from the sensor 3, and have therefore different amplitudes and are deformed differently. The possibility of simultaneous transmission of these distant sources also results in the presence of different amplitudes and different pulse shapes.
- Circuit 10 transforms them into pulses of the same amplitude and standard form, provided that circuit 11 of error signaling of the pulses received and the circuit 12 for level coherence monitoring in the same message (all the pulses of the same message, therefore coming from the same source must have substantially the same amplitude) recognize as good the pulses received.
- the output of circuit 10 is connected to a sampling circuit 13, itself connected to a circuit 14 for detecting synchronization errors and collision errors (overlapping pulses) causing the triggering of time monitoring.
- the output of circuit 10 is also connected to a phase detector 15, the sequencing input of which is connected to a clock signal generator 16 (providing signals at a period of 150 ⁇ s in the present example).
- the outputs "phase delay” and “phase advance” of the detector 15 are connected to the control inputs of a clock signal generator 17 (providing signals with a period of 250 nanoseconds in the present example), the output of which is connected to the sequencing input of circuit 13.
- circuit 10 is finally connected to a bus activity detector 18 (in fact detecting the phases of inactivity on the bus), the output of which is connected to the inhibit / activate clock input 17.
- bus activity detector 18 in fact detecting the phases of inactivity on the bus
- the logic information then restored RXI, RXN
- the periods of inactivity of the bus must be consistent in duration with the specifications of the bus protocol, that is to say with the limits of duration of the "intermessage gap" of the bus (ARINC 629 protocol in this case ). It is also the role of the time coherence monitoring circuit 14.
- Circuit 18 also provides direct "Bus Quiet" information used by all of the offset control circuits 8 for the start of each adaptation phase.
- the phase detection carried out by the circuit 15 and the application of an advance or a delay on the clock for sampling and restitution of the logic information are necessary for the compensation of the drift of this clock.
- circuit 8 of Figure 1 There is shown in Figure 3 a digital embodiment of circuit 8 of Figure 1.
- the input terminal 19 of this circuit is connected to the output of the converter 6.
- Terminal 19 is connected to three threshold detection circuits, respectively referenced 20, 21 and 22.
- Circuit 20 is adjusted to a threshold below which the pulses received are estimated to be insignificant, during transient periods ( in particular when the device is switched on).
- the circuits 21 and 22 are adjusted to thresholds situated respectively slightly above and slightly below a value equal to the output voltage of the circuit established during a period of inactivity on the fiber 2.
- circuit 20 is connected via a circuit 23 for detecting transient phases to a first input of an OR gate 24, the second input of which is connected to a bus inactivity detector, such as circuit 18 in FIG. 2
- the output of the OR 24 is connected to the validation input of a clock pulse generator 25, with a period of 200 ⁇ s in the present example.
- the output of generator 25 is connected to the input of clock signals from an accumulation register 26.
- circuits 21 and 22 are respectively connected to the inputs "-" and "+” of an adder 27, the output of which is connected via an amplifier 28 to a first input of an adder 29, the second input of which is connected to the output of register 26.
- the output of adder 29 is connected to the input of register 26, the output of which is also connected to the output terminal 30 of circuit 8.
- the operation of the device described above is as follows. During the periods of reception of pulse trains circulating on the optical bus 2, the assembly 8 is inhibited (the clock 25 controlling the register 26 is not validated by the output signal from the OR 24. because this is neither the power-up phase nor a period of bus inactivity The optical pulses, converted into electrical pulses by the sensor 3, sampled by the CAN converter 6 and checked by the set 7 , are sent as signals (RXI, RXN) to the operating circuits, not shown, connected downstream of the assembly 7.
- a logic validation signal appears at the output of OR gate 24, which releases the clock 25 and validates the register 26.
- a signal appears on one of the outputs of circuits 21 or 22. This signal, amplified at 28, is algebraically added to the previous content of register 26.
- a digital signal which, after conversion into an analog signal by the converter 9, makes it possible to slave the DC component of the output signal of the circuit 4 to a value (slightly positive in the present case) which is such as pulses, even of very low amplitude, occurring after a short period of bus 2 inactivity, can be taken into account.
- the input signal of the converter 6 is, in the absence of the circuit of the invention, superimposed on a DC component which varies slowly with respect to the period of the impulses, which can mask subsequent impulses occurring soon after.
- this DC component is slaved to a slightly positive value which makes it possible to take into account all the significant pulses (level between 6mV and 1.5 V in the present case) occurring even little long after the last pulse of a train.
- FIG. 4 shows a simplified embodiment, with analog circuits of the control circuit of the invention.
- the circuit assembly 8 ′ has the same elements 3, 4 and 5 as the assembly 8 in FIG. 3.
- the output of the adder 5 is connected to an amplifier 31 whose output is connected on the one hand to a comparator 32, and on the other hand, via a switch 33, at the input of an integrating amplifier 34 partially replacing the functionality of the circuit 8 and of the DAC converter 9.
- the output of the amplifier 34 is connected to the 'input "-" of the adder 5.
- the output of the comparator 32 is connected to a set of circuits 7' similar to the set 7.
- the bus inactivity detection output of the set T is connected to the control input of the switch 33.
- This switch 33 is controlled in such a way that when the bus is active, a zero voltage is applied to the input of the amplifier 34 is in an inactive state not causing the application of '' a modification of the offset compensation, and that when the bus is inactive, the input d the amplifier 34 is connected to the output of the amplifier 31.
- the operation of the assembly 8 'described above is similar to that of the assembly 8.
- the input of the amplifier 34 is 0 volts, and maintains the value of the offset developed during the previous acquisition phase.
- the input of the amplifier 34 is switched to the output of the amplifier 31, performing the measurement of the offset present, which forces the output voltage of the amplifier 31 to zero. So at the end of the period of inactivity of the bus, the input voltage of the amplifier 34 is practically zero, there is storage by the amplifier as soon as the switch 33 switches, and so on.
- the assembly 8 ' is slower than the circuit assembly 8, in particular because of the reaction times of the amplifiers 31 and 34, but comprises fewer components than the latter, and is therefore less expensive than it.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96927739A EP0843914A1 (fr) | 1995-08-11 | 1996-08-02 | Procede d'exploitation du signal de sortie d'un capteur ou d'un convertisseur recevant une energie impulsionnelle intermittente, et dispositif de mise en oeuvre |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9509758A FR2737825B1 (fr) | 1995-08-11 | 1995-08-11 | Procede d'exploitation du signal de sortie d'un capteur ou d'un convertisseur recevant une energie impulsionnelle intermittente, et dispositif de mise en oeuvre |
| FR95/09758 | 1995-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997007593A1 true WO1997007593A1 (fr) | 1997-02-27 |
Family
ID=9481886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1996/001240 Ceased WO1997007593A1 (fr) | 1995-08-11 | 1996-08-02 | Procede d'exploitation du signal de sortie d'un capteur ou d'un convertisseur recevant une energie impulsionnelle intermittente, et dispositif de mise en oeuvre |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0843914A1 (fr) |
| CA (1) | CA2226308A1 (fr) |
| FR (1) | FR2737825B1 (fr) |
| WO (1) | WO1997007593A1 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6461490B1 (en) | 1996-04-25 | 2002-10-08 | Pence, Inc. | Biosensor device and method |
| US6787368B1 (en) | 1999-03-02 | 2004-09-07 | Helix Biopharma Corporation | Biosensor method for detecting analytes in a liquid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227155A (en) * | 1978-05-31 | 1980-10-07 | Abbott Laboratories | Amplifier with dark current compensation |
| US4289399A (en) * | 1978-08-12 | 1981-09-15 | Iwasaki Tsushinki Kabushiki Kaisha | Light signal observation device |
| WO1991011812A2 (fr) * | 1990-01-30 | 1991-08-08 | Thomson Composants Militaires Et Spatiaux | Circuit d'echantillonnage de signaux analogiques |
| DE4041203A1 (de) * | 1990-12-21 | 1992-06-25 | Licentia Gmbh | Schaltungsanordnung |
| US5319266A (en) * | 1993-02-24 | 1994-06-07 | Antel Optronics Inc. | Differential boxcar integrator with auto-zero function |
-
1995
- 1995-08-11 FR FR9509758A patent/FR2737825B1/fr not_active Expired - Fee Related
-
1996
- 1996-08-02 CA CA 2226308 patent/CA2226308A1/fr not_active Abandoned
- 1996-08-02 WO PCT/FR1996/001240 patent/WO1997007593A1/fr not_active Ceased
- 1996-08-02 EP EP96927739A patent/EP0843914A1/fr not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227155A (en) * | 1978-05-31 | 1980-10-07 | Abbott Laboratories | Amplifier with dark current compensation |
| US4289399A (en) * | 1978-08-12 | 1981-09-15 | Iwasaki Tsushinki Kabushiki Kaisha | Light signal observation device |
| WO1991011812A2 (fr) * | 1990-01-30 | 1991-08-08 | Thomson Composants Militaires Et Spatiaux | Circuit d'echantillonnage de signaux analogiques |
| DE4041203A1 (de) * | 1990-12-21 | 1992-06-25 | Licentia Gmbh | Schaltungsanordnung |
| US5319266A (en) * | 1993-02-24 | 1994-06-07 | Antel Optronics Inc. | Differential boxcar integrator with auto-zero function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6461490B1 (en) | 1996-04-25 | 2002-10-08 | Pence, Inc. | Biosensor device and method |
| US6478939B1 (en) | 1996-04-25 | 2002-11-12 | Pence, Inc. | Biosensor device and method |
| US6787368B1 (en) | 1999-03-02 | 2004-09-07 | Helix Biopharma Corporation | Biosensor method for detecting analytes in a liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2737825A1 (fr) | 1997-02-14 |
| FR2737825B1 (fr) | 1997-09-12 |
| EP0843914A1 (fr) | 1998-05-27 |
| CA2226308A1 (fr) | 1997-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2238471B1 (fr) | Dispositif pour imagerie active 3d | |
| FR2583524A1 (fr) | Procede et appareil de detection de personnes. | |
| EP0709254A1 (fr) | Système de communication d'informations par courants porteurs, notamment pour un véhicule automobile | |
| FR2484754A1 (fr) | Procede et dispositif de surveillance d'une scene par camera video | |
| FR2934390A1 (fr) | Transmission multicanaux sur un bus unifilaire | |
| EP1916770A1 (fr) | Convertisseur analogique/numérique à approximations successives, composant intégré et procédé de conversion correspondants | |
| EP0002415B1 (fr) | Procédé et dispositif de comptage des erreurs de transmission dans une liaison hertzienne numérique | |
| EP0073164A2 (fr) | Système émetteur-récepteur de transmission numérique par voie optique et à débit variable | |
| FR2804761A1 (fr) | Methode de test et appareil aux signaux synchrones de source | |
| EP0843914A1 (fr) | Procede d'exploitation du signal de sortie d'un capteur ou d'un convertisseur recevant une energie impulsionnelle intermittente, et dispositif de mise en oeuvre | |
| US5367154A (en) | Photosensor readout detector having dynamic reset rate | |
| CH637779A5 (fr) | Detecteur photoelectrique. | |
| EP2327160B1 (fr) | Compteur analogique et imageur incorporant un tel compteur | |
| EP0843925A1 (fr) | Procede de surveillance et de restitution de formes d'ondes, et dispositif de mise en oeuvre | |
| FR2962877A1 (fr) | Procede de commande de diodes electroluminescentes | |
| FR2699768A1 (fr) | Procédé de contrôle automatique de gain pour un récepteur numérique, notamment un récepteur à accès multiple à répartition dans le temps et dispositif pour sa mise en Óoeuvre. | |
| EP0010010A1 (fr) | Dispositif à seuil permettant de distinguer le blanc du noir sur un document et émetteur de télécopie comportant un tel dispositif | |
| US7388535B1 (en) | Digitizing front end for optical receiver | |
| EP0051531B1 (fr) | Appareillage pour la datation précise d'un évènement par rapport à une référence de temps | |
| EP0905946B1 (fr) | Commande d'échantillonnage d'un signal biphase | |
| EP2320567A1 (fr) | Circuit de raccordement de capteurs | |
| FR2608880A1 (fr) | Systeme d'extraction et de mesure d'amplitude des signaux de synchronisation dans les recepteurs-emetteurs de television, en particulier pour transmission par satellite | |
| FR2515898A1 (fr) | Procede et dispositif de conversion analogique-numerique de type adaptatif | |
| EP0890957A1 (fr) | Echantillonneur-bloqueur | |
| FR3108817A1 (fr) | Procédé de communication selon un protocole TDMA entre un dispositif maître et au moins un dispositif esclave |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 1996927739 Country of ref document: EP |
|
| ENP | Entry into the national phase |
Ref document number: 2226308 Country of ref document: CA Ref country code: CA Ref document number: 2226308 Kind code of ref document: A Format of ref document f/p: F |
|
| WWP | Wipo information: published in national office |
Ref document number: 1996927739 Country of ref document: EP |
|
| WWW | Wipo information: withdrawn in national office |
Ref document number: 1996927739 Country of ref document: EP |