WO1999000983A1 - Video device and video and audio data transmission system for remote diagnosis - Google Patents
Video device and video and audio data transmission system for remote diagnosis Download PDFInfo
- Publication number
- WO1999000983A1 WO1999000983A1 PCT/FR1998/001359 FR9801359W WO9900983A1 WO 1999000983 A1 WO1999000983 A1 WO 1999000983A1 FR 9801359 W FR9801359 W FR 9801359W WO 9900983 A1 WO9900983 A1 WO 9900983A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- video
- audio
- operator
- camera
- antenna
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Definitions
- the invention relates to an image forming device as well as a system for bi-directional transmission and transmission of video and audio information for remote diagnosis, in particular of a motor vehicle engine.
- the technical field of the invention is that of remote diagnosis of motor vehicle breakdowns, in particular engine breakdowns, whether mechanical or electrical, for example.
- a vehicle repairer encounters a complex technical problem that is difficult to solve in his garage, he seeks help from the technical center of the car manufacturer concerned, which may be in a location very far from the garage.
- the only means of communication between this mechanic and the technical center are the telephone for voice conversations and the fax for texts and static images such as diagrams or photos.
- the transmission of new diagrams is made by fax.
- the telephone network remains the only means of communication between the repairer and the technical center, or between several garage owners.
- video conferencing devices that use the telecommunications line to the standard of the switched telephone network (PSTN) or to the standard of the integrated services digital network (ISDN), to transmit the image and the voice between two speakers located in two distant places.
- PSTN switched telephone network
- ISDN integrated services digital network
- a videoconference device for a first speaker uses a camera attached to a desktop computer, which processes images and sound information for transmission over the PSTN or ISDN telephone line.
- the image and sound received by the second speaker are again processed by the computer of the video conference device.
- the image is displayed on part of the computer screen and sound is output from its speakers.
- the fixed camera of this type of device does not give any usable result.
- the drawbacks of this type of device are in fact the absence of suitable lighting, which makes the image of the engine organs incomprehensible and unusable, and the impossibility of adjusting the focusing according to the part to be viewed.
- the invention overcomes these drawbacks by first proposing a portable image-forming device, the development of which allows the observation of an organ of the vehicle, in its overall view as in its details, and whose lighting is diffuse, homogeneous and variable so as not to saturate the camera and facilitate the interpretation of the video signal obtained.
- a first object of the invention is a device for forming a video signal comprising a solid-type monolithic camera, of portable format, characterized in that the camera is equipped with a “pin-hole” type lens. "with an i-spherical lens placed in front of an aperture whose dimensions are determined as a function of the desired depth of field, and of diffuse, uniform and variable lighting.
- this image-forming device is produced in the form of a video torch or a video headset, preferably wirelessly.
- a second object of the invention is a system for forming images of the visualized part of the vehicle on the one hand and audio information from the voice of the repairer on the other hand, then bidirectional transmission of these two types over-the-air video and audio information to the repairer's local computer, located in his garage.
- This local computer then sends this information via the telephone network of the PSTN or ISDN type, or else via a satellite broadcasting network, to the computer located at the technical center of the automobile manufacturer, for example, which in turn transmits information of the same type. type to the first operator.
- a video device and by a wireless audio headset, on which are fixed on the one hand a unidirectional microphone, connected to a modulator of the audio signal coming from the microphone, of carrier frequency F ⁇ , associated with a antenna intended for wireless transmission of the audio signal thus modulated, and on the other hand an antenna associated with a carrier frequency demodulator F 2 , different from the transmission frequency F ⁇ , and - by an electronic processing device audio signals, on which is fixed on the one hand an antenna for receiving the modulated video signal, connected to a demodulator followed by means for compressing the then demodulated video signal, with a view to its transmission by telecommunication means, and on the other hand share an antenna for receiving the high frequency audio signal, connected to a demodulator followed by a circuit for routing the audio channels connected to said compression means.
- FIG. 4 an embodiment of a second type of video device according to the invention, in longitudinal section;
- FIG. 6 a diagram of an exemplary embodiment of the electronic signal processing devices of a system according to the invention.
- FIG. 1 is a schematic view in longitudinal section of a video device, portable due to its weight and dimensions, produced in the form of a video torch 1, easily understood by an operator, and whose function is to form, from a camera 2, an image of the parts or members that it illuminates, in an engine or a motor vehicle in the example of a garage operator.
- This torch is formed of a cylindrical body 3, at one end of which is fixed a frustoconical part 4 closed by a transparent cover 5. Inside the truncated cone 4 is arranged a conical reflector 6 in the center of which is placed a non-coherent homogeneous lighting means, a halogen lamp 7 for example.
- a camera 2 At the most flared end of the frustoconical part 4 is placed a camera 2, the objective of which is turned towards the transparent cover 5 of the torch.
- the cylindrical body 3 is intended to be held in the hand by an operator wishing to view parts of an automobile engine for example.
- the image of the part is formed using a monolithic electronic camera 2, of the solid type, with CCD or CMOS (Complementary Metal Oxide Silicon) charge transfer. It is fitted with an easily achievable, inexpensive lens, the focus of which is between a few millimeters and fifty centimeters in front of the camera.
- This objective is of the "pin-hole” type, consisting of a small hole on which a semi-spherical lens is placed. The diameter of the hole and the radius of the lens are determined as a function of the depth of the object field which it is desired to obtain for the camera. This focusing of the image makes it possible to observe both the details of a mechanical member or an electrical circuit of the vehicle, as well as their overall view.
- the focusing of the image thus obtained is of low cost compared to the cost of a controlled objective, provided with a system of automatic focusing by conventional electric motor in cameras.
- this lighting is diffuse, homogeneous and of variable intensity, in order to not saturate the camera and not to create strongly lit areas, as a lighting could do direct.
- the image of parts with numbers or references, especially mechanical aluminum parts, is much easier to interpret thanks to this type of diffuse lighting.
- the range of operation of this diffuse lighting ranges from 8 lux to 300 lux for example.
- This diffuse lighting is obtained by placing a diffusing plate 8 in front of the halogen lamp 7, thus closing the truncated cone 4 rendered reflective.
- This plate 8 is pierced with a hole in its center to allow passage to the camera lens fixed in front of this plate relative to the halogen lamp.
- the material used for this diffusing plate 8 is for example diffusing polymer, such as Poly-methyl methacrylate.
- the reflective cone 6 is of the parabolic type, made of polymer for example, for its lightness.
- the rear face 9 of the camera, receiving the light from the halogen lamp 7, is reflective to return all the light towards the reflective cone. For this, this face 9 is either polished or covered with a metal plate or a reflective layer, in chromed polymer for example.
- the camera 2 is fixed inside the end of the frustoconical part 4 of the torch 1 by two brackets 10 and 11 , in mechanical contact with both the camera and the body of the torch.
- the cover 5, consisting of an optically transparent plate, is screwed onto the head of the video torch 1 to securely hold the elements constituting this head, that is to say the plate 8 of diffusing polymer, the camera 2, the reflector 6 and the halogen lamp 7.
- the CCD camera 2 operates in the visible spectrum, the transparency will correspond to the visible spectrum of 400 to 700 nanometers in wavelength. If the CCD camera works in the spectrum near infrared, it will be transparency in this spectrum, obtained by a filter cover, letting through only the optical wavelengths, between 700 and 1100 nanometers.
- the frustoconical part 4 of the torch can be manufactured by machining or by molding in aluminum for example, thermally conductive material of low cost.
- the two brackets 10 and 11 used for mounting the camera also allow the evacuation of the heat released by the halogen lamp 7, since they constitute thermal bridges between the camera and the body of the torch.
- the light emitted by the lamp 7 then reflected successively by the reflective rear face 9 of the camera and then the conical reflector 6, passes through the diffusing plate 8 around the camera 2, except at the level of the stirrups 10 and 11.
- a low intensity halogen lamp is used to save the power supply to the camera.
- this video device 1 is electrically autonomous, without electrical connection wire, supplied by a supply circuit 12, consisting of a rechargeable accumulator or a battery for example, which supplies the necessary electrical voltages. during the operation of the camera, the lighting by the halogen lamp 7 and a laser pointer 13.
- a laser pointer 13 located near the transparent cover of the torch, can be operated to produce very specific additional lighting. This laser task is then visible on the image of the vehicle organs, to specify the part or the references to be displayed during the exchange of information between the two operators.
- the intensity of the lighting provided by the torch is variable, thanks to a circuit 14 for adjusting the intensity of the halogen lamp connected to the supply circuit 12, and controlled by a control button 15 placed outside. of the torch.
- the video signal of the image of the engine parts, produced by the camera 2 of the video torch 1, must be sent to a transmission circuit 16 with very high frequency modulation, which sends the modulated image over the air, by by means of a radiating antenna 17 fixed to the outside of the plug 18 for closing the body of the torch.
- This VHF video transmitter 16 is electrically powered by circuit 12.
- FIG. 3 An alternative embodiment, shown in FIG. 3, consists in producing a video torch, part of which is flexible.
- the cylindrical body 3 of the torch in which are housed the electrical supply circuit 12, the circuit 14 for adjusting the intensity of the lamp and the button 15 for varying this intensity, the VHF video transmitter 16, and which is closed by the cap provided with a video transmission antenna, remains rigid, as is the frustoconical part 4 in which the halogen lamp 7 and the CCD camera 2 are housed and which is closed by the transparent cover 5, but these two parts are spaced from each other by a flexible hose 19, made of rubber for example.
- the flexibility of this hose makes it possible to orient the CCD camera and its diffuse lighting in any position, thus allowing the operator to access parts or organs of the engine not usually accessible by the human eye.
- the lamp and video signal supply connections from the camera are placed inside the pipe 19.
- FIG 4 is a schematic sectional view of a video headset 20, playing the same role as the video light 1 but freeing both hands of the operator who can thus carry out delicate repairs according to the information sent by the center technical.
- This video headset 20 allows image formation by a CCD camera 21 and diffuse lighting obtained by placing a plate of diffusing material 22 in front of a halogen lamp 23.
- the camera and the lamp are electrically powered by a circuit 24, of the accumulator type. for example, which is also connected to a very high frequency video transmitter 25, sending the video signal, via a video transmission antenna 26, to the local garage station.
- the torch like the video headset can be supplied by wired link by the general electrical network, and do not then comprise an autonomous supply circuit 12 or 24.
- FIG. 5 illustrates an exemplary embodiment of a system for training and transmitting video and audio information, used in particular for the remote diagnosis of motor vehicles, between two operators G and T, located in two geographic locations different, distant from each other but connected by a telephone network of PSTN or ISDN type and having an electronic signal processing device, preferably in the form of a computer.
- These electronic devices are detailed in FIG. 6, described at the same time as FIG. 5, which is a diagram of an exemplary embodiment of the electronic signal processing devices of a system according to the invention.
- a first operator G which can be the mechanic or repairer has two types of information training on the one hand video and audio on the other hand.
- a first operator G which can be the mechanic or repairer has two types of information training on the one hand video and audio on the other hand.
- a first operator G which can be the mechanic or repairer has two types of information training on the one hand video and audio on the other hand.
- a first operator G which can be the mechanic or repairer has two types of information training on the one hand video and audio on the other hand.
- a first operator G which can be the mechanic or repairer has two types of information training on the one hand video and audio on the other hand.
- a first operator G which can be the mechanic or repairer has two types of information training on the one hand video and audio on the other hand.
- a first operator G which can be the mechanic or repairer has two types of information training on the one hand video and audio on the other hand.
- a first operator G which can be the mechanic or repairer has two types of information training on the one hand
- an antenna 33 for receiving the modulated video signal which is connected to a demodulator 34 followed by a coding card 35, used for compression of the video signal then demodulated, in view of its transmission by the telephone network 36, in real time, to the second operator T.
- the mechanic wears a wireless headset 37, on which is fixed on the one hand a unidirectional microphone 38, taking into account only the voice of the operator with the exception of surrounding noise, and connected to means 39 of high frequency audio emission, constituted by a modulator of the audio signal coming from the microphone 38, of carrier frequency F- ⁇ , and by an associated antenna 40, intended for the transmission by hertzian way of the audio signal thus modulated.
- high frequency audio reception means constituted by an antenna 41 associated with a demodulator 42 of carrier frequency F 2 , different from the transmission frequency F, to avoid harmful interference.
- the respective values of these frequencies F. ⁇ and F 2 may for example be 34 MHz and 200 MHz in France.
- the words of the operator G emitted in the microphone 38 are modulated under carrier frequency F. ⁇ and then transmitted by the high frequency transmission means, to the local station 30 on which is fixed an antenna 43 for receiving high frequency audio .
- the device for electronic processing of the received audio signal essentially consists of a high frequency audio demodulator 44, a circuit 45 for routing the audio channels, and by the coding card 35 used for signal compression.
- the high frequency audio demodulator 44 is intended to demodulate the audio signal modulated under carrier frequency F ⁇ .
- the purpose of the routing circuit 45 is to route the audio channel of the local station 30, of carrier frequency F 1 , to the coding card and the audio channel of another geographically distant operator, of carrier frequency F 2 , to the first operator.
- This circuit switch is connected to the coding card 35 of the demodulated signal, which carry out its compression, with a view to its transmission by the telephone network 36.
- another local station 50 is placed intended to receive the audio signal and the compressed video signal. , coming from the first operator and having circulated along the telephone network, and comprising a device for electronic processing of these signals.
- the second local station placed for example in the technical center of the automobile manufacturer, comprises an electronic processing device 51, a computer for example, provided with a screen 52, intended to carry out the processing received signals.
- the electronic processing device essentially consists of a coding card 53 used for the decompression of audio and video signals, by decoding, with a view to their restitution to the second operator T.
- the images are reproduced on the screen 52 and the sound is restored by loudspeakers associated either with the computer or with an audio headset 54 after passing through a routing circuit 55 of audio channels. If this headset is connected by a wire to local station 50, the audio signal comes directly to the operator's ears.
- the second operator To establish a dialogue between the two operators and to answer in particular the questions of the first in the face of a breakdown that it fails to repair for example, the second operator must be able to communicate, in turn, to the first operator, oral and written information .
- he has a unidirectional microphone 56 to transmit only his own words and not those of the other technicians of the center, who are also called upon by other mechanics. If the operator has a helmet, this microphone can be attached to it.
- the operator T sends an audible signal via his microphone 56 to the local station 50, where it is received by the electronic processing device, in the routing circuit 55 of the audio channels which sends it to the card.
- coding 53 used for its compression with a view to its transmission over the PSTN or ISDN telephone network for example.
- This operator T also has video means, such as a fixed camera 58 for sending to the first operator image files or electrical or mechanical diagrams for example, intended to answer his questions and help him in his diagnosis or in his repairs.
- the video signal coming from the camera 58 also passes through the coding card 53 for its compression before being sent over the telephone network.
- FIG. 7 represents the particular case of an exchange of information with a second operator T equipped with a headset 60 connected, not by a wire but by radio link to the local station.
- this headset For the reception of audio information coming from the first operator G and ending at the second local station 50, this headset must be equipped with a high frequency audio reception antenna 61 and a high frequency audio receiver 62, of carrier frequency F 3 for demodulating the audio signal coming from a modulator 63 associated with a transmitting antenna 64 of the local station 50.
- a microphone 65 For transmission to the first operator G, a microphone 65 must be associated with a modulator 66 and another antenna 67 for high-frequency audio transmission, while the local station 50 must be equipped with an antenna 68 for audio reception high frequency associated with an electronic processing device which comprises a demodulator 69 of the audio signal sent by the second operator T, through the microphone of his wireless headset.
- the sound coming from the microphone 65 is modulated according to a carrier frequency F 4 , different from the reception frequency F 3 , by the modulator 66 and sent by the transmitting antenna 67 to the reception antenna 68 and the demodulator 69 of the local station 50.
- This signal is then compressed.
- the values of F 3 and F 4 can for example be equal to 36 MHz and 202 MHz in France.
- this second operator T has autonomous video means such as a video torch 1.
- an antenna for receiving the modulated video signal in the torch connected to a connected demodulator to the coding card, with a view to its transmission by the telecommunication medium, these circuits being similar to those already described in FIGS. 5 and 6 for local station 30.
- the reception of these signals by the operator G is done as follows.
- the audio signal from the telephone network 36 first passes through the coding card 35 for its decompression, before being routed by the routing circuit 45, to then be restored to audio transmission means 70. Their role is then to modulate this audio signal according to the frequency F 2 , before it is sent to the headset of the first operator G, by an antenna 71 for high frequency audio transmission.
- This signal is picked up by the antenna 41 of the helmet 37 of the operator G, then demodulated.
- the audio signal is not transmitted to the operator by VHF modulation.
- the video signal coming from the camera 58 of the technical center is also decompressed then restored on the screen 32 of the local station 30.
- FIG. 8 is a variant of the system for training and transmitting audio and video information according to the invention, using no longer a telephone network, but a satellite broadcasting network.
- the second geographic location where the operator T of the technical center is located must be equipped with a parabolic antenna 83 and a modulation and demodulation circuit 84.
- the latter only needs a single antenna 83 for the transmission of information to these different local stations each equipped with an individual satellite dish, provided that they stay in the satellite coverage.
- the main advantage of the invention lies in its application to remote diagnosis of motor vehicle breakdowns.
- the proposed solution consists in forming the image of the part of the engine to be visualized and the voice of the repairman placed near a vehicle, then transmitting this image and this sound, over the air, to his local computer placed in his garage.
- the local computer sends the image and sound, via the telephone network or a satellite broadcasting network, to the technical center of the car manufacturer.
- the repairer thus has a training system and transmission of video and audio information, wireless or hands-free, from the vehicle to his local computer, which in turn communicates this information in real time to the central computer , via the telephone network or a television broadcasting network.
- the technical center has the same system for transmitting video and audio information towards the garage. It is thus possible to carry out a remote diagnosis with image and sound, in real time, at a distance between the two places.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98933730A EP0995314A1 (en) | 1997-06-27 | 1998-06-26 | Video device and video and audio data transmission system for remote diagnosis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR97/08161 | 1997-06-27 | ||
FR9708161A FR2765440B1 (en) | 1997-06-27 | 1997-06-27 | VIDEO DEVICE AND SYSTEM FOR TRANSMITTING VIDEO AND AUDIO INFORMATION FOR TELEDIAGNOSIS |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999000983A1 true WO1999000983A1 (en) | 1999-01-07 |
Family
ID=9508592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1998/001359 WO1999000983A1 (en) | 1997-06-27 | 1998-06-26 | Video device and video and audio data transmission system for remote diagnosis |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0995314A1 (en) |
FR (1) | FR2765440B1 (en) |
WO (1) | WO1999000983A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2341996A (en) * | 1998-07-18 | 2000-03-29 | Monitron International Limited | Vending inspection site |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2791200A1 (en) * | 1999-03-16 | 2000-09-22 | Franck Seive | SYSTEM FOR REMOTE ESTIMATION OF WORK COST |
NO20020856D0 (en) | 2002-02-22 | 2002-02-22 | Abb Research Ltd | Communication method and system |
DE10349165A1 (en) * | 2003-10-22 | 2005-05-19 | Ernst Völlm | Device for integrated control and use of entertainment and information facilities |
FR2883693B1 (en) * | 2005-03-25 | 2007-10-05 | Stephane Venet | SYSTEM FOR MONITORING AND DIRECTING THE ACTIVITY OF MEMBERS OF AN AUDIOVISUAL TURNING TEAM |
FR2891679B1 (en) * | 2005-10-05 | 2007-12-07 | Giat Ind Sa | DEVICE FOR TRANSMITTING INFORMATION. |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5046163A (en) * | 1990-03-16 | 1991-09-03 | Priest Ronald A | Hand held internally illuminated video reading aid |
US5309895A (en) * | 1991-10-04 | 1994-05-10 | Olympus Optical Co., Ltd. | Endoscope apparatus producing video signals from imaging signals at illuminating and non-illuminating periods |
WO1994023538A1 (en) * | 1993-04-05 | 1994-10-13 | Westech Geophysical, Inc. | Instrument probe having a back-lighted camera |
WO1996009614A1 (en) * | 1994-09-12 | 1996-03-28 | Ziegra Richard C | Video audio data remote system |
DE19547789A1 (en) * | 1995-12-20 | 1997-06-26 | Siemens Ag | Remote diagnosis system for ind. plant |
-
1997
- 1997-06-27 FR FR9708161A patent/FR2765440B1/en not_active Expired - Fee Related
-
1998
- 1998-06-26 WO PCT/FR1998/001359 patent/WO1999000983A1/en not_active Application Discontinuation
- 1998-06-26 EP EP98933730A patent/EP0995314A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5046163A (en) * | 1990-03-16 | 1991-09-03 | Priest Ronald A | Hand held internally illuminated video reading aid |
US5309895A (en) * | 1991-10-04 | 1994-05-10 | Olympus Optical Co., Ltd. | Endoscope apparatus producing video signals from imaging signals at illuminating and non-illuminating periods |
WO1994023538A1 (en) * | 1993-04-05 | 1994-10-13 | Westech Geophysical, Inc. | Instrument probe having a back-lighted camera |
WO1996009614A1 (en) * | 1994-09-12 | 1996-03-28 | Ziegra Richard C | Video audio data remote system |
DE19547789A1 (en) * | 1995-12-20 | 1997-06-26 | Siemens Ag | Remote diagnosis system for ind. plant |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2341996A (en) * | 1998-07-18 | 2000-03-29 | Monitron International Limited | Vending inspection site |
Also Published As
Publication number | Publication date |
---|---|
FR2765440A1 (en) | 1998-12-31 |
EP0995314A1 (en) | 2000-04-26 |
FR2765440B1 (en) | 1999-09-03 |
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