WO2003048785A1 - Dispositif de detection des chutes - Google Patents

Dispositif de detection des chutes Download PDF

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Publication number
WO2003048785A1
WO2003048785A1 PCT/JP2002/012730 JP0212730W WO03048785A1 WO 2003048785 A1 WO2003048785 A1 WO 2003048785A1 JP 0212730 W JP0212730 W JP 0212730W WO 03048785 A1 WO03048785 A1 WO 03048785A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
acceleration
drop
closed container
sensor
Prior art date
Application number
PCT/JP2002/012730
Other languages
English (en)
Japanese (ja)
Inventor
Satoshi Teranishi
Original Assignee
Ubukata Industries Co.,Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ubukata Industries Co.,Ltd. filed Critical Ubukata Industries Co.,Ltd.
Priority to AU2002357585A priority Critical patent/AU2002357585A1/en
Priority to JP2003549929A priority patent/JP4005561B2/ja
Publication of WO2003048785A1 publication Critical patent/WO2003048785A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/135—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by making use of contacts which are actuated by a movable inertial mass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/18—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration in two or more dimensions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch

Definitions

  • the present invention relates to a fall detection device for performing appropriate processing such as detecting a fall of a device to be protected and operating a protection device.
  • semiconductor-type three-axis acceleration sensors with high input resolution are often used because the detected acceleration change is as small as 1 G or less.
  • the signal output from the acceleration sensor is amplified by an amplifier circuit, processed by an AZD converter, and determined by a determination circuit.
  • the protection device is configured to be activated.
  • the semiconductor type three-axis acceleration sensor has high accuracy and is expensive.
  • the power consumption of the signal processing circuit is large, the usable time is shortened when power cannot be obtained directly from a commercial power supply, for example, when a portable power supply is configured using a battery as a power supply. For this reason, there is a problem that frequent charging and battery replacement are required.
  • the drop sensor 1 having the above-described configuration, a configuration that constantly changes the contact state against gravity by an elastic body such as a spring is required.
  • the elastic body In order to detect a change in gravity, the elastic body is held at a predetermined position by receiving the weight of the inertial body that is hung by 1 G of gravity when stationary, and the apparent weight of the inertial body is determined by dropping or the like.
  • the value When the value is reduced to a value, it must be configured so that contacts and the like are operated immediately.
  • the mass of the inertial body also decreases, so it is necessary to make the elastic body that supports it flexible. Therefore, the smaller the sensor, the more difficult it is to design the sensor.
  • the elastic body is made flexible, there is a problem that the elastic body is easily deformed even with an impact acceleration applied to normal handling. For this reason, from the viewpoint of the strength setting and durability of the elastic body, for example, horizontal vibration It is difficult to convert an acceleration sensor that detects such things as a fall sensor that detects acceleration in the direction of gravity by simply arranging it horizontally.
  • a unidirectional mechanical accelerometer with a simple structure could be used as the drop sensor.
  • an object of the present invention is to provide a fall detecting device which can accurately detect a fall of a target device in any posture, and has a simple configuration and excellent impact resistance. Disclosure of the invention
  • the fall detection device of the present invention is provided with a metal cylindrical closed container, a movable contact provided in the closed container and having a plurality of contact portions arranged at equal intervals, and provided on an inner peripheral surface of the closed container.
  • a plurality of mechanical drop sensors comprising: a fixed contact that can be separated from and contacted with the movable contact; and a permanent body that is housed in the hermetically sealed container and that pushes down the movable contact by its own weight to contact the fixed contact. I have one.
  • the drop sensor has the same characteristics in all directions around the central axis of the cylindrical closed container, and when in a normal posture in which the central axis of the closed container is a horizontal axis and in a stationary state, When the inertial body deflects the movable contact and comes into contact with the fixed contact, and when the apparent weight of the inertial body is reduced to a predetermined value or less due to dropping or the like, the movable contact is opposed to the weight of the inertial body. Are configured to be separated from the fixed contact. For this reason, the plurality of drop sensors are the same as at least one of the other drop sensors by changing the inclination angle of the central axis of the closed container so that a part of the allowable tilt range for the normal posture overlaps.
  • the posture By arranging on a flat surface, the posture However, a fall can be detected with high accuracy. Moreover, since the drop sensor has the same characteristics in all directions around the central axis of the closed container, the number of drop sensors used is reduced as compared with the case of using a unidirectional drop sensor. Can be. In addition, since a plurality of drop sensors can be arranged on the same plane, the configuration and manufacturing are simplified. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a diagram showing the entire configuration of a fall detection device according to a first embodiment of the present invention
  • FIG. 2 is a vertical side view of the fall sensor 1
  • Fig. 3 is a vertical sectional view of the drop sensor shown in Fig. 2 along the line 3-3.
  • FIG. 4 is a diagram corresponding to FIG. 1 showing a second embodiment of the present invention
  • FIG. 5 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention.
  • FIGS. 1 to 3 show a first embodiment of the present invention.
  • a fall detection device 1 includes a signal processing circuit 100 including a plurality of components on a substrate 4 housed in a device to be protected 2 and a plurality of fall sensors 3. Etc. are arranged.
  • the drop sensor 3 is a small accelerometer, for example, as disclosed in Japanese Patent Application Laid-open No. 2001-19464 It has substantially the same configuration as the illustrated acceleration sensor.
  • FIG. 2 is a longitudinal sectional view of the drop sensor 3
  • FIG. 3 is a sectional view taken along line 3-3 in FIG.
  • the drop sensor 3 is provided with a closed container 101 comprising a bottomed cylindrical metal container 31 and a lid plate 32 airtightly fixed to the opening thereof.
  • the outer diameter of the closed container 101 is 3.3 mm
  • the length is The modulus is set to 6.2 mm.
  • the inner peripheral surface 31 A of the metal container 31 is a fixed contact.
  • the cover plate 32 includes a metal plate 32 B having a through hole 32 A, and a rod-shaped conductive terminal 3 air-tightly fixed to the through hole 32 A with an electrically insulating material 34 such as glass. It consists of three.
  • a metal movable contact 35 having a plurality of movable portions 35 A having a panel property is conductively fixed to a tip inside the container 31 of the conductive terminal 33.
  • the movable contact 35 is configured such that a movable portion 35A radially extends from the center thereof.
  • the movable contact 35 is welded and fixed to the conductive terminal 33 with its center portion sandwiched between the end surface of the conductive terminal 33 and the metal backing plate 39. It is fixed to the conductive terminal 33. Further, by sandwiching the movable contact point 35 between the backing plate 39 and the resin insulation holder 38, the movable portion 35A is bent at a predetermined angle with respect to the center of the movable contact 35. -Will be kept.
  • the movable portion 35A when the movable portion 35A is in a free state without an inertia body 36 described later, the movable portion 35A extends along the longitudinal direction (the left-right direction in FIG. 2) of the inner peripheral surface 31A of the container 31. They are arranged at equal intervals in the circumferential direction. The tip of each movable portion 35A is bent toward the inner peripheral surface 31A of the container 31 to form a contact portion 35B.
  • the movable portion 35A contacts the inner peripheral surface 31A of the metal container 31 which is a fixed contact at the tip of the contact portion 35B. Therefore, since the contact portion 35B contacts the inner peripheral surface 31A with a small area close to the point contact, the contact pressure is increased, and a contact failure due to contamination of the inner peripheral surface 31A of the container is prevented. I'm sorry.
  • a metal inertia body 36 is disposed inside the container 31.
  • the diameter of the inertial body 36 is set to 2.4 mm.
  • the posture of the drop sensor 3 when the metal container 31 (closed container 101) is arranged so that the central axis thereof is the horizontal axis is the normal posture.
  • the inertial body 36 bends the movable portion 35 A by its own weight. While pressing down, the contact portion 35 B contacts the inner peripheral surface 31 A of the metal container 31. Therefore, normally, the metal container 31 and the conductive terminal 33 are electrically connected.
  • An electric insulator 37 such as a resin is disposed on the closed bottom surface of the metal container 31.
  • the movable contact 35 is made of a very thin metal plate having conductivity, in this embodiment, a phosphor bronze plate having a thickness of 12 Aim. Therefore, if it is repeatedly caught between the inertial body 36 and the inner surface of the container, it may be deformed by extension. In addition, when the drop sensor 3 'receives an impact acceleration and the inertial body 36 hits the movable contact 35 near the holding portion between the insulating holder 38 and the contact plate 39, the movable contact 3'5 is elastically deformed. There is a possibility of plastic deformation beyond the region. Therefore, in the present embodiment, the protrusion 38 A is provided on the insulating holder 38.
  • the inertia body 36 moves to the backing plate 39 side, the inertia body 36 comes into contact with the protruding portion 38A, so that the movable contact 35 by the holding portion 38 and the backing plate 39 is formed. Does not hit near the holding part. Therefore, even when the drop sensor 13 receives an impact acceleration, the inertial body 36 does not apply excessive stress to the movable portion 35 A, and the plastic deformation of the movable contact 35 and the characteristic change accompanying it are prevented. Can be prevented.
  • a plurality of columnar portions 31B are provided at equal intervals on the inner peripheral surface 31A of the metal container 31.
  • the columnar portion 31B projects in a columnar shape inside the container 31.
  • the size and height of the adjacent columnar part 31B are such that when the inertial body 36 and the columnar part 31B come into contact with each other, the inertial body 36 It is set not to reach 1 A.
  • the movable portion 35A of the movable contact 35 is disposed between the adjacent columnar portions 31B. Thereby, even when the movable part 35 A and the inertial body 36 come into contact with each other, a gap always occurs between the inner surface 31 A of the container 31 and the inertial body 36.
  • the fall sensor 3 uses a semiconductor type acceleration sensor because of its structure, it does not change its characteristics even under the impact acceleration given in normal handling or long-term use. No special handling is required.
  • the bent movable portion 35 A pushes the inertial body 36 back to the center of the container 31.
  • the contact with the inner peripheral surface 31A of the container 31 is released. Therefore, conduction between the metal container 31 and the conductive terminal 33 is cut off. In this way, the contact state can be reliably switched when the fall sensor 3 is in the fall state.
  • the inclination of the central axis of the container 31 is set within a predetermined angle with respect to the horizontal axis, and the movable part 35 A is sufficiently bent by the inertial body 36.
  • the inertial body 36 must be brought into contact with the inner peripheral surface 31 A of the metal container 31.
  • the inertia body 36 The weight does not work sufficiently in the direction of contacting the bottom surface and bending the movable part 35 A. Therefore, the contact part 35 B is moved from the inner peripheral surface 31 A by a slight change in gravity due to vertical movement.
  • the drop detecting device 1 is configured such that the plurality of drop sensors 3 are arranged on the substrate 4 and the center axes of the containers 31 of the plurality of drop sensors 3 are located on the same plane.
  • the drop sensor 3 is arranged while changing the inclination angle within the allowable inclination angle so that at least one of the other drop sensors 3 overlaps the range where the normal operation is performed.
  • each drop sensor 3 is cylindrical and has uniform characteristics in all directions with respect to its central axis, so that the substrate 4 can be rotated about any axis parallel to the substrate surface. Even if is changed, the inclination of at least one central axis of the drop sensor 3 with respect to the horizontal axis falls within the allowable error.
  • the drop sensor 3 since the drop sensor 3 has the same characteristics in all directions with respect to its central axis, the front and back and the lateral inclination of the sensor 3 do not matter when placed on a substrate or the like. Considering only the direction of the shaft makes handling easy. When a unidirectional mechanical acceleration sensor is used, it is necessary to arrange the sensor three-dimensionally in order to have sufficient sensitivity in all directions around the three axes. In the case of the drop sensor 3, the central axes can be aligned on the same plane, which facilitates manufacturing.
  • the drop sensors 3 are all arranged in parallel on a circuit to form an OR circuit, so that an ON signal can be always input to the signal processing circuit 100 when in a stationary state. Then, as described above, when the fall detection device 1 falls and the apparent weight decreases, the fall sensor 3 in the normal posture moves the movable portion 35 A to the inertial body 36. Since the contact part 35 B is pushed back to the center of the container 31 and the contact part 35 B is separated from the metal container 31, the output is reliably turned off. In addition, the drop sensor 3 tilted beyond the allowable tilt range is distributed faster than the drop sensor 3 in the normal posture because the weight of the inertial body 36 is dispersed from the direction perpendicular to the movable part 35 A.
  • the signal processing circuit 100 determines that the fall detection device 1 has entered the fall state.
  • the signal processing circuit 100 since the signal from the drop sensor 13 does not need to be particularly amplified or A / D converted, the signal processing circuit 100 is simpler than when a semiconductor sensor is used and also consumes less power. It can be kept low. Therefore, for example, even when the power source is a battery, it can be used for a long time.
  • the drop sensor 3 has a switch structure which is very sensitive to a change in gravity but has contacts at the same time.
  • the inertial body 36 may oscillate and repeat contact opening and closing even with the normal use of the equipment to be protected, and such an OFF signal may cause a false determination of a drop. is there.
  • the signal processing circuit 100 of the drop detecting device 1 does not simply look at the off state of the drop sensor 13, but the state where the signal from the drop sensor 3 is turned off has reached a predetermined time. It is determined whether or not to perform the protection operation based on whether or not. That is, if the signal from the drop sensor 13 is turned off within a predetermined time even if it is once turned off, it is determined that there is no problem due to normal use. On the other hand, if the signal from the drop sensor 13 has been turned off for more than a predetermined time, it is determined that the drop state has continued and the drop has a height that requires protection. Appropriate protection processing is performed on the devices to be protected, for example, by temporarily stopping the recording operation for the device overnight or turning off the power.
  • FIG. 4 shows a second embodiment of the present invention, and different points from the first embodiment will be described.
  • the same parts as those in the first embodiment are denoted by the same reference numerals.
  • the fall detection device 11 according to the present embodiment is the same as the first embodiment in that it is incorporated in a portable device such as a notebook personal computer (hereinafter referred to as a notebook personal computer), for example. It detects the acceleration in the upward direction and can perform protection processing on the equipment to be protected. ⁇ Especially when using a laptop computer on a desk, the power cable, LAN cable, and connection cables to various external devices are connected. If these cables are inadvertently pulled and the portable device falls, the fall time is shorter than a simple drop because the cable is pulled strongly first and has an initial velocity.
  • the fall detection device may not be able to perform protection processing because fall detection is not in time. Therefore, in the present embodiment, it is possible to detect that horizontal or upward acceleration that may lead to a drop is applied to the device to be protected, and to perform quicker processing.
  • two acceleration sensors 5 are arranged on the substrate 14 in addition to the plurality of drop sensors 3.
  • the two acceleration sensors 5 are arranged such that their central axes are perpendicular to each other.
  • the board 14 is arranged horizontally and the acceleration sensor 5 is arranged in parallel with the surface of the board 14.
  • the fall detection device 11 can detect acceleration applied in the horizontal and upward directions. it can.
  • one acceleration sensor 5 is arranged so that its central axis is parallel to the central axis of a housing of a notebook computer or the like to be protected.
  • the acceleration sensor 15 has the same configuration as that of the acceleration sensor disclosed in Japanese Patent Application No. 2001-176640 filed earlier by the present applicant, for example.
  • the acceleration sensor 5 has substantially the same shape as the above-mentioned fall sensor 3, but has a normal posture in which the central axis coincides with the horizontal axis and is in a stationary state by increasing the spring property of the movable contact.
  • the contact portion does not contact the container against the weight of the inertial body.
  • the contact portion is separated from the inner surface of the container with a slight gap by balancing the radius by the weight of the inertial body, and when the equipment to be protected receives a large acceleration in the horizontal direction or
  • the contact part comes into contact with the metal container and turns on.
  • the movable contact is balanced so that it does not contact the fixed contact point at an acceleration of 1 G due to gravity, and the contact between the contacts is increased when the acceleration applied to the inertial body increases to 1.5 G or more. Has been.
  • the drop sensor 3 opens the contact point when the apparent gravity decreases below a set value for a simple drop, and the drop sensor 3 opens its contact point. If it is determined that the signal processing circuit 100 has dropped or dropped from the duration or the like, a signal is input to the protection processing device to perform appropriate protection processing.
  • the protection processing device to perform appropriate protection processing.
  • the device to be protected is accelerated in the direction of water square, the gravity applied to the drop sensor 3 does not change.
  • the apparent gravity increases, so that the drop sensor 3 maintains the contact state of the contact points.
  • the acceleration sensor 15 is always off type, and when a horizontal or upward acceleration is applied to the device to be protected, and when the acceleration exceeds a predetermined value, the contact is closed. For example, if the power cable is pulled and the device to be protected is subjected to a sudden acceleration that causes the device to fall, the acceleration sensor 5 closes the contact. Then, the signal processing circuit 100 that has received the signal from the acceleration sensor 5 outputs an acceleration detection signal, and the protection processing device that has received this signal performs appropriate protection processing. Also, if sudden acceleration is applied upward, In this case, similar detection and protection processing can be performed.
  • the drop detector 11 is substantially more sensitive to the acceleration in the direction of gravity.
  • a device to be protected such as a notebook computer
  • the fall detecting device 11 is configured to more sensitively detect the acceleration due to the upward movement, it is possible to prepare for a danger of falling.
  • the two acceleration sensors 5 are arranged so that their central axes are orthogonal to each other, and these acceleration sensors 5 ′ are connected in parallel on a circuit, so that the devices to be protected can be protected.
  • the acceleration applied to the front and rear and the acceleration applied to the left and right can be detected in the same way.
  • only one acceleration sensor 15 can be used.
  • uniform characteristics can be provided in all directions in the horizontal plane.
  • FIG. 5 shows a third embodiment of the present invention, and different points from the second embodiment will be described.
  • the same parts as those of the second embodiment are denoted by the same reference numerals.
  • a lifeline has been used as a protective device for workers at high places, for example, to hold the worker's body and prevent it from falling.
  • a fall accident still occurs.
  • impacts such as wearable airbags and auxiliary nets deployed around the workplace have been used to reduce the impact of a fall in a fall accident.
  • Absorption aids have been proposed.
  • the shock absorbing auxiliary device operates by receiving a fall detection signal from the fall detection device 21 worn by the worker to be protected, thereby allowing the worker to fall. It is possible to prevent lowering and reduce the impact when falling.
  • the drop detecting device 21 is provided with a belt (corresponding to a mounting means) 7 for mounting on a worker. That is, as shown in FIG. 5, in the drop detecting device 21, a substrate 24 is housed in a case 6 attached to a belt 7. The fall detection device 21 is attached via a belt 7 near the center of the body, which is least susceptible to vibrations and acceleration / deceleration movements due to normal work, for example, near the waist of the worker.
  • the fall detection device is attached to the worker's arm, not only will the fall detection device become an obstacle during the work, but acceleration and deceleration due to the movement of the arm will be repeated in any work, causing malfunction.
  • a similar problem occurs when the fall detection device is attached to the worker's foot.
  • the worker's torso especially the lower back, which is the center of movement, sudden movement is unlikely to occur normally, and vibration and acceleration that may cause the drop sensor 3 to malfunction, including intentional cases. Is unlikely to be given.
  • the drop detection device 21 is attached to the waist via the belt 7, the posture in which the substrate 24 arranged in the case 6 follows the body becomes the normal posture.
  • the normal posture of the substrate 24 is almost vertical. Even if the substrate 24 is arranged in such a posture, the fall sensor 13 is arranged on the substrate 24 so that the normal operation range overlaps with at least one of the other fall sensors 3. At rest, at least one sensor 3 always has its contacts closed. Also, when the operator changes his posture, such as bending down or lying down, one drop sensor 3 always closes the contacts as described above.
  • the signal processing circuit 100 If the state does not continue for a predetermined time after all the signals are turned off, a fall signal is not output.
  • a malfunction may occur when jumping. For example, when the wearer jumps on the spot or jumps over a small step, the wearer is in a free fall state from when the foot leaves the ground until it reaches the ground again. Therefore, if this time exceeds a predetermined time, it is erroneously determined to be a fall. This is because the predetermined time is set on the assumption that the vehicle accelerates by free fall, such as jumping off a step or falling. In the case of a leap, deceleration is continued from the moment the foot is released from the ground to the highest point, and acceleration is continued until landing from the highest point.
  • the acceleration sensor 5 is used as a sensor for detecting a jump.
  • the contact portion is separated from the inner surface of the container with a slight gap by balancing the radius with the weight of the inertial body.
  • the inertial body When the apparent gravity of the inertial body increases due to the upward acceleration, the inertial body further deflects the contact portion to contact the metal container, and turns on the contact points.
  • the movable contact and the fixed contact are balanced so that they do not come into contact with each other at an acceleration of 1 G due to gravity.
  • the acceleration increases by 0.5 G or more, conduction is established between the contacts. ing.
  • the acceleration sensor 5 is configured to be turned on when the apparent weight of the inertial body becomes 1.5 times.
  • Signal from accelerometer 5 is signal processed
  • the fall detection device 21 determines that the wearer has jumped and ignores the signal from the fall sensor 13 for a certain period of time so as not to perform signal processing. ing. Therefore, the free fall time due to jumping is ignored. If the falling state continues for longer than the free fall time due to jumping, the signal processing circuit 100 normally processes the signal from the drop sensor 5 to detect the fall, so that a protection operation must be performed. Can be.
  • the drop sensor 3 is arranged in plurality in consideration of the posture of the worker, only one acceleration sensor 5 is arranged. This is for the following reason. In other words, the worker may work while standing upright or close to that, and bend his hips or lie on his stomach. Therefore, it is necessary to operate any one of the drop sensors 3 for various postures of the worker. On the other hand, the worker's posture during the jump JS is upright or close to it, and jumping in a posture in which the body, especially the waist, etc., is extremely inclined or laid down is usually impossible. Therefore, basically, only one acceleration sensor 5 is required so that detection can be performed in the normal posture.
  • the drop sensor 13 and the acceleration sensor 5 used for the drop detectors 11 and 21 are designed to prevent the inertial body from applying excessive stress to the movable part as described for the drop detector 1. It is configured. As a result, the sensor itself will not be destroyed or the operating characteristics will not be offset if the device to be protected falls within a range that will not be destroyed, as well as the impact acceleration in normal handling. Therefore, for example, there is no problem even if the operator throws the fall detection device lightly with normal handling, and the fall sensor itself is broken while protecting the equipment to be protected in the event of a fall. No events will occur that could damage or offset the use of the protected equipment. Industrial applicability
  • the fall detection device is built in or attached to a portable device such as a notebook type personal convenience store or a protected object such as a worker at a high place, and detects a drop of the protected object by detecting the fall of the protected object. It is useful for activating the protection device.

Abstract

L'invention concerne un dispositif de détection des chutes (1) qui comprend une pluralité de détecteurs de chutes (3) dotés de contacts mobiles (35) placés dans des récipients cylindriques métalliques fermés (101) et de des parties de contact à intervalles réguliers, ainsi que des stabilisateurs (36) contenus dans les récipients fermés. Ces stabilisateurs (36) exercent sur les contacts mobiles (35) une pression vers le bas en utilisant leur propre poids pour les amener en contact avec les contacts fixes (31A) qui représentent les surfaces périphériques intérieures des récipients fermés. Les détecteurs de chutes peuvent posséder les mêmes caractéristiques dans toutes les directions autour de l'axe central des récipients fermés.
PCT/JP2002/012730 2001-12-07 2002-12-04 Dispositif de detection des chutes WO2003048785A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002357585A AU2002357585A1 (en) 2001-12-07 2002-12-04 Falling detection device
JP2003549929A JP4005561B2 (ja) 2001-12-07 2002-12-04 落下検出装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001/374805 2001-12-07
JP2001374805 2001-12-07

Publications (1)

Publication Number Publication Date
WO2003048785A1 true WO2003048785A1 (fr) 2003-06-12

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Application Number Title Priority Date Filing Date
PCT/JP2002/012730 WO2003048785A1 (fr) 2001-12-07 2002-12-04 Dispositif de detection des chutes

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Country Link
JP (1) JP4005561B2 (fr)
AU (1) AU2002357585A1 (fr)
WO (1) WO2003048785A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60233563A (ja) * 1984-05-02 1985-11-20 Tokyo Keiki Co Ltd 加速度計測装置
JP2000283995A (ja) * 1999-03-31 2000-10-13 Ntt Advanced Technology Corp 墜落検知センサー
JP2001194382A (ja) * 2000-01-12 2001-07-19 Ubukata Industries Co Ltd 落下センサー

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60233563A (ja) * 1984-05-02 1985-11-20 Tokyo Keiki Co Ltd 加速度計測装置
JP2000283995A (ja) * 1999-03-31 2000-10-13 Ntt Advanced Technology Corp 墜落検知センサー
JP2001194382A (ja) * 2000-01-12 2001-07-19 Ubukata Industries Co Ltd 落下センサー

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JPWO2003048785A1 (ja) 2005-04-14
JP4005561B2 (ja) 2007-11-07
AU2002357585A1 (en) 2003-06-17

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