DE2703491A1 - Location of people buried by avalanche - uses radio transmitter on victim, and portable receiver producing audio signal to guide rescue team - Google Patents
Location of people buried by avalanche - uses radio transmitter on victim, and portable receiver producing audio signal to guide rescue teamInfo
- Publication number
- DE2703491A1 DE2703491A1 DE19772703491 DE2703491A DE2703491A1 DE 2703491 A1 DE2703491 A1 DE 2703491A1 DE 19772703491 DE19772703491 DE 19772703491 DE 2703491 A DE2703491 A DE 2703491A DE 2703491 A1 DE2703491 A1 DE 2703491A1
- Authority
- DE
- Germany
- Prior art keywords
- transmitter
- amplitude
- avalanche
- audio signal
- receiver
- 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.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B29/00—Apparatus for mountaineering
- A63B29/02—Mountain guy-ropes or accessories, e.g. avalanche ropes; Means for indicating the location of accidentally buried, e.g. snow-buried, persons
- A63B29/021—Means for indicating the location of accidentally buried, e.g. snow-buried, persons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/68—Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
Abstract
Description
Verfahren zur Ortung Verschütteter nach dem Prinzip der aktivenProcedure for locating buried victims based on the active principle
Sonde.Probe.
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Anspruches 1.The invention relates to a method according to the preamble of the claim 1.
Die Oberlebenschancen von Lawinenverschütteten werden wesentlich bestimmt durch die Zeit zwischen Verschüttung und Befreiung.The survival chances of avalanche victims are largely determined through the time between burial and liberation.
Diese Zeit wird entscheidend bestimmt durch Such zeit und Ortungsgenauigkeit.This time is decisively determined by the search time and location accuracy.
Die üblichen Lawinensonden nach dem Prinzip der aktiven Sonde benötigen typischerweise eine Suchzeit von 3 Minuten bei einer Ortungsgenauigkeit von einigen bletern. Das hier angesprochene Verfahren ergibt bei einer etwa halbierten Suchzeit eine bessere Ortungsgenauigkeit (unter 1 m) evtl. verbunden bei einer genügenden Erfahrung des Suchenden mit einer Abschätzung der Tiefe des Verschütteten. Im Gegensatz zu den bisherigen Verfahren ist eine Feststellung der Richtung möglich, in der der Verschüttete liegt.You need the usual avalanche probes based on the active probe principle typically a search time of 3 minutes with a positioning accuracy of a few blutter. The method discussed here results in a search time that is roughly halved a better location accuracy (less than 1 m) possibly connected with a sufficient Experience of the seeker with an estimate of the depth of the buried subject. In contrast In relation to the previous procedures, it is possible to determine the direction in which the Buried lies.
Erreicht wird diese drastische Verbesserung durch das in den Ansprüchen beschriebene Verfahren. Die bekannten Lawinensonden ebenso wie die hier beschriebene arbeitet mit einer Frequenz von ca. 2000 Hz und benutzt als sendendes und empfangendes Element eine Ferrit-Spule.This drastic improvement is achieved through that in the claims described procedure. The well-known avalanche probes as well as the one described here works with a frequency of approx. 2000 Hz and used as sending and receiving Element a ferrite coil.
In Abhängigkeit vom Abstand und der räumlichen Anordnung des Ferrit-Stabes ändert sich die Amplitude des Empfangssignals. Oblicherweise wird dieses Empfangssignal über einen Kopfhörer wahrgenommen und die Lautstärke dieses Signals dient als Anzeige für die Entfernung.Depending on the distance and the spatial arrangement of the ferrite rod the amplitude of the received signal changes. Usually this received signal perceived through headphones and the volume of this signal is used as an indicator for the distance.
Erfindungsgemäß wird hier die variable Amplitude in eine variable Tonfrequenz umgewandelt d.h. im Empfänger ist ein zusätzlicher Amplitudenfrequenzwandler enthalten. Da das Ohr auf Frequenz änderungen wesentlich empfindlicher anspricht als auf Lautstärkeänderungen ist die mit diesem Zusatz ausgerüstete Sonde so empfindlich, daß Richtungsänderungen der Antenne ebenso festgestellt werden können und damit der Suchvorgang richtungsabhängig direkt zum Verschütteten stattfindet. Da im Panikfall das mit den üblichen Lawinensonden benutzte Suchsystem nach einem Orthogonalnetz meist nicht sorgfältig genug vorgenommen wird, ergibt sich im realen Einsatz ein zusätzlicher Vorteil bei Verwendung der hier beschriebenen Sonde.According to the invention, the variable amplitude becomes variable here Audio frequency converted i.e. an additional amplitude frequency converter is included in the receiver. Because the ear is much more sensitive to changes in frequency than to changes in volume the probe equipped with this additive is so sensitive that changes of direction the antenna can also be determined and thus the search process depends on the direction takes place directly to the buried subject. Since in the case of panic, that with the usual avalanche probes The search system used for an orthogonal network is usually not carried out carefully enough , there is an additional advantage in real use when using the probe described here.
Die Erfindung ist anhand der Figuren 1 und 2 erläutert. Fig. 1 zeigt das Gerät in Sendestellung. Der Generator G liefert seine Energie an eine Ferritantenne A, welche ein elektromagnetisches Feld F erzeugt.The invention is explained with reference to FIGS. 1 and 2. Fig. 1 shows the device in transmission position. The generator G supplies its energy to a ferrite antenna A, which generates an electromagnetic field F.
Fig. 2 zeigt ein Gerät in Empfangsstellung. Die entsprechende Ferritantenne A empfängt das Signal, welches in einem auf die Sendefrequenz abgestimmten selektiven Verstärker V verstärkt, in einem Gleichrichter Gl gleichgerichtet wird und ggfs. über einen Zeit-Mittelungsglied T geglättet, einem Amplitudenfrequenzwandler AF zugeführt wird, Die abgegebene Tonfrequenz wird einem Kopfhörer K angezeigt.Fig. 2 shows a device in the receiving position. The corresponding ferrite antenna A receives the signal, which is tuned to the transmission frequency in a selective Amplifier V amplified, rectified in a rectifier Gl and possibly. smoothed over a time averaging element T, an amplitude frequency converter AF The audio frequency output is displayed to a headphone K.
Es ist mit dem erfindungsgemäßen Verfahren möglich, eine entsprechend höhere Sendefrequenz zu wählen; dadurch kann neben Verringerung der Abmessungen der Sendespule die Pulsfolgefrequenz so erhöht werden, daß auch bei gepulstem Betrieb und Mittlung über mehrere Pulse eine Anzeigegeschwindigkeit erzielt wird, die für die Richtungssuche hinreichend ist.It is possible with the method according to the invention, a corresponding to choose a higher transmission frequency; this, in addition to reducing the dimensions the transmitter coil, the pulse repetition frequency can be increased so that even with pulsed operation and averaging over several pulses, a display speed is achieved that is suitable for the search for direction is sufficient.
L e e r s e i t eL e r s e i t e
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772703491 DE2703491A1 (en) | 1977-01-28 | 1977-01-28 | Location of people buried by avalanche - uses radio transmitter on victim, and portable receiver producing audio signal to guide rescue team |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772703491 DE2703491A1 (en) | 1977-01-28 | 1977-01-28 | Location of people buried by avalanche - uses radio transmitter on victim, and portable receiver producing audio signal to guide rescue team |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2703491A1 true DE2703491A1 (en) | 1978-08-03 |
Family
ID=5999769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19772703491 Withdrawn DE2703491A1 (en) | 1977-01-28 | 1977-01-28 | Location of people buried by avalanche - uses radio transmitter on victim, and portable receiver producing audio signal to guide rescue team |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2703491A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3215523C1 (en) * | 1982-04-26 | 1983-09-29 | Wilhelm Ruf KG, 8000 München | Circuit arrangement for locating buried persons according to the transmitter / receiver principle |
EP0236946A2 (en) * | 1986-03-07 | 1987-09-16 | Nec Corporation | Mobile receiver unit having function for providing information of electric field intensity |
FR2644700A1 (en) * | 1989-03-21 | 1990-09-28 | Option | Device for detecting and locating victims of avalanches |
FR2654632A2 (en) * | 1989-03-21 | 1991-05-24 | Option | Device for detecting and locating avalanche victims |
DE9400950U1 (en) * | 1994-01-20 | 1995-08-24 | Selectronic Vertriebs Gmbh | Device for detecting living bodies and their use |
DE4432971A1 (en) * | 1994-09-16 | 1996-03-21 | Markus Braunewell | Protection system for drawing attention to removal of object e.g. handbag from person |
-
1977
- 1977-01-28 DE DE19772703491 patent/DE2703491A1/en not_active Withdrawn
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3215523C1 (en) * | 1982-04-26 | 1983-09-29 | Wilhelm Ruf KG, 8000 München | Circuit arrangement for locating buried persons according to the transmitter / receiver principle |
EP0092600A1 (en) * | 1982-04-26 | 1983-11-02 | Wilhelm Ruf KG | Method and circuit for locating buried persons according to the transmitter/receiver principle |
EP0236946A2 (en) * | 1986-03-07 | 1987-09-16 | Nec Corporation | Mobile receiver unit having function for providing information of electric field intensity |
EP0236946A3 (en) * | 1986-03-07 | 1989-04-26 | Nec Corporation | Mobile receiver unit having function for providing information of electric field intensity |
FR2644700A1 (en) * | 1989-03-21 | 1990-09-28 | Option | Device for detecting and locating victims of avalanches |
FR2654632A2 (en) * | 1989-03-21 | 1991-05-24 | Option | Device for detecting and locating avalanche victims |
DE9400950U1 (en) * | 1994-01-20 | 1995-08-24 | Selectronic Vertriebs Gmbh | Device for detecting living bodies and their use |
DE4432971A1 (en) * | 1994-09-16 | 1996-03-21 | Markus Braunewell | Protection system for drawing attention to removal of object e.g. handbag from person |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2340187C3 (en) | Method and device for identifying a source generating electromagnetic vibrations | |
DE2813273A1 (en) | NAVIGATION DEVICE | |
DE1135533B (en) | Circuit for the joint generation of microwave transmission oscillations and microwave reception superimposed oscillations for radar devices with utilization of the Doppler effect | |
DE2506432A1 (en) | METHOD AND DEVICE FOR GEOPHYSICAL EXAMINATIONS IN EARTH DRILLS USED BY WAVES AT VERY LOW FREQUENCY | |
WO1986002539A1 (en) | Device for localizing metal objects in a human or animal body | |
DE2703491A1 (en) | Location of people buried by avalanche - uses radio transmitter on victim, and portable receiver producing audio signal to guide rescue team | |
DE102017209092A1 (en) | Method and device for locating a vehicle for inductive energy transmission | |
DE3027823C2 (en) | Two-way distance measuring system | |
DE102010016028B4 (en) | Method for operating a detector using an electromagnetic alternating field and detector | |
DE1798104A1 (en) | Device for measuring the speed of flowing media | |
DE1190845B (en) | Device for detecting sound-reflecting bodies, in particular fish | |
EP3658955B1 (en) | Method for recognizing at least one object in the vicinity of a vehicle | |
DE19901174C1 (en) | Method and device for electromagnetic detection of objects | |
DE19528698C1 (en) | System for measuring cable faults such as cable breaks and insulation faults | |
AT391561B (en) | Search device for finding the direction of transmitters which emit a direction-finding signal | |
DE2107380C3 (en) | Relay distance measuring arrangement with beat phase comparison | |
EP0837344B1 (en) | Method and apparatus for detection of metallic objects | |
DE934019C (en) | Procedure for measuring the propagation of sound in open water | |
DE4309599A1 (en) | Method and device for detecting an inaminate object having dynamic properties in the ground | |
AT413450B (en) | Device for determining thickness of layers, especially snow depths, has correlator for separate computation of two correlation functions from two sub-sequences and definable correlation signal | |
EP0130422A1 (en) | Ship anchor surveillance | |
DE622458C (en) | Method for suppressing the superimposed vibrations between the carrier of the transmitter to be received and that of an interfering transmitter | |
DE2263870B2 (en) | Method and arrangement for transmitting and receiving ultrasonic waves for navigation systems operating with the Doppler effect | |
DE3643548A1 (en) | Ultrasonic receiving device for detecting contrast medium | |
AT202610B (en) | Device for locating a radio frequency receiver |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OGA | New person/name/address of the applicant | ||
8139 | Disposal/non-payment of the annual fee |