JPH04500727A - A monitor device for monitoring the interior space of a car, for example, the window of the interior space of a car. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] A monitor device for monitoring the windows of an interior space, such as a car interior. Place The invention relates to a special monitoring device as defined in the preamble of the main claim. In fact, many types of monitoring devices are known. this is For example, to monitor spaces such as the interior of a car to prevent theft. It is a device for

In known monitoring devices, mechanical contacts on the window to be monitored are For example, there is each sensor affixed and fixed, and it is It is now possible to sense the vibrations/vibrations that occur in each unit when it is pressed.

However, one drawback to this type of monitoring device is the large expense involved. i.e. one sensor and its wiring for each window to be monitored. and a coupled evaluation device are required, and the sensor touches the window. A relatively small break in a window that is far from the point being It becomes increasingly difficult, if not impossible, to detect this as a break.

Multi-monitoring of windows for window destruction at particularly low expense This object is achieved by the present invention as set forth in claim 1. The invention is useful not only for monitoring the windows of automobiles or other vehicles, but also for e.g. It is also suitable for monitoring the interior of a fixed property such as a warehouse.

Furthermore, the invention can even be used with completely different frequency ranges of received vibrations. Also suitable for additional use with sensors for certain other indoor space monitoring methods That is, the present invention forms a sensor by a microphone, and As a result, it can be used not only as a window breakage detection element, but also as an acoustic radar device. It also makes it possible to additionally use the device as a receiving element in the device. This aspect of the invention Deployments can be made in space at a similar cost, i.e. with fewer sensors. Additionally, it is possible to accurately detect suspicious movements within the vehicle.

Compared to the monitoring device promulgated in GB-A-1402530, the present invention Transmitted by the indoor air, e.g. lower than or equal to 1QQKHz It is even possible to evaluate ultrasound frequencies above . Furthermore, the present invention In this case, a single sensor covers the entire range of the vehicle, as will be explained later. It is possible to guarantee this. In this case, the present invention uses a sensor and a monitor. The distance between the window range and the distance to be measured is several meters.

The features recited in the subclaims may also be characterized as additionally provided improvements. Paragraph 2 of the box makes it possible to keep expenses particularly low, and claim 3 makes it possible to keep costs particularly low. The use of standard, especially high-frequency sound generators when the fuselage is destroyed and claim 4 provides that only frequencies below 100 KHz are used. If so, as experience with automobile windows shows, deliberate window destruction Since this method often results in non-detection, it is possible to eliminate non-detection errors due to window destruction. , claim 5 provides that even if the number of windows to be monitored is extremely large, and in addition some of the windows to be monitored are near the sensor. , and even if others are very far from it, the entire volume of the space to be monitored is It is possible to achieve an equally high degree of reliability of the monitoring device with respect to the windows. claim 6 allows for the use of a single sensor that can exclude obstructions between the sensor and the window to be monitored, such as It is easily possible, in addition, that the sensor is mounted on the lower edge of the window. Rather, if the sensor is attached to the base of the rearview mirror or the interior light, It would be extremely difficult for an intruder to destroy the window and sensor at the same time. and can be particularly discreet for particularly attractive designs. It allows for a particularly effective solution for vehicles that are at risk of harm, and claim No. 7 The sensor is installed completely inconspicuously within the ceiling cover and is also , between the sensor and the window to be monitored, e.g. a headrest. Obstacles can be easily excluded; in addition, the sensor It is easier for an intruder to use the window and sensor at the same time than if it were installed on the tree. A particularly useful solution for hazardous vehicles that are extremely difficult to destroy Claim 8 provides a mirror-symmetric directivity characteristic that is easy to manufacture. i.e. its directivity has two slightly overlapping lobes, i.e. This is particularly easy to manufacture and allows for additional use of sensors such as However, claims 9 and 10 refer to the cells used in the methods described above. It is also possible to use the sensor as a receiving element for acoustic radar. Ru.

The invention will be explained in more detail with reference to embodiments of the invention depicted in four drawings. It will be revealed.

Figure 1 depicts an example of a circuit that can evaluate vibrations received by a sensor. This is a circuit diagram.

Figure 2 shows different applications of a car using a single sensor, i.e. with a particularly low outlay. FIG. 3 is a diagram depicting an example of monitoring a window.

FIGS. 3 and 4 illustrate a sensor with a single, but in this case selected, directional characteristic. This diagram depicts an example of similarly monitoring different windows of a car using sensors. be.

In each case, Figures 2 to 4 depict a car with a front side F and a rear side R. It is.

In the space being monitored, i.e. in the car being monitored, for example, If the window is knocked on, the result is that not only the audible but also the inaudible , i.e. sound waves are generated in space, including in the ultrasonic range.

Which example depicts the arrangement of a sensor S according to the invention in a motor vehicle interior l? In other words, in Figures 2 to 4, the windshield CF, door window Door CV, AS, rear glass GH, roof glass opening GD in Fig. 2 and Fig. 3 and the small rear side window GK' in Figure 4 are the monitors. - will be done. The car pictured as an example thus has many windows. Also, in any case, a single sensor S can destroy a space ■ that has It is being monitored in relation to losses. Furthermore, the figure shows that those ≧ A wall W surrounding the interior of the vehicle, which is located on the side and/or above the interior of the vehicle. and/or below! ! It represents W. In this way, sensor S is everything in the car. relevantly monitored for damage to the windows, i.e. by an intruder, for example. tar.

Sensor S normally detects vibrations generated when a window is broken, e.g. can detect ultrasonic vibrations. For this purpose, one sensor S one invention According to the report, multiple sensors S can also be installed on the vehicle depicted. in the interior ■ and/or on at least one wall W of the space I, if any Also, the monitored windows GF, GV, Cps, GK, GH, GD are machine In each case, each sensor S is basically connected to the room. It is mounted so that it can only receive vibrations transmitted by the air inside. like this Although this sensor S does not touch the monitored window, it ends up generated by the window and transmitted by the indoor air when the window is broken. reacts to sound waves.

According to the present invention, normally generated when a window is broken, and indoor ■ Number of sensors S capable of detecting acoustic vibrations transmitted by air - from Figures 2 to 4 In the example depicted, only a single sensor is shown - the (7) Space 1 (Q’) in F-GFSGV, GS%, respectively monitored by GK1GH, is less than the number of GD, i.e. in the example depicted. Even if the window is damaged, it will be fixed in F-GF, 'GV, GS. , less than the number of GK%GH1GD. Therefore, the expense required to implement the present invention is There are few.

Thus, the present invention eliminates the high expense required by the prior art, i.e. One sensor and their arrangement is required for each window to be monitored. , this inconvenience has been removed. Furthermore, the present invention does not apply to conventional technology, for example, If the damage is far from the point where the sensor contacts the window, it is considered window damage. In the case of relatively small window breaks to be shipped, the sensor Until now, there are multiple transmission paths on the window, which is impossible with conventional technology. Even if it's not impossible, it removes inconveniences that are difficult to overcome.

Ultimately, the present invention prevents an intruder from artificially bringing the sensor into contact with the window through the damaged part. damping the sound transmission path on the window, e.g. by damaging the window. A method such as applying an adhesive film to dampen sound transmission on the window before It can also respond to situations. In fact, if the present invention is used, it is possible to is used for window breakage detection and is actually always detected when the window is broken. A standard acoustic frequency generated in the window is used for window breakage detection.

In addition, the present invention requires less outlay, i.e. than a monitored window. It even makes it possible to achieve the desired monitoring using fewer sensors. this child This makes it possible to substantially save wiring for the sensors used in the present invention. .

Thus, for example, in the illustrated embodiment, the invention provides a large gala window. To detect damage to a window, use the ultrasonic sound that typically occurs when a window is damaged. one or more narrow or wide bands of wave frequencies. are picked up by one or more sensors and converted into electrical signals.

In principle, in this case one or more sensors could be installed inside the car. It is possible to install it in any place. In this case, it is particularly desirable that the sound Reaches the sensor directly from the broken window instead of coming around the pest shall be installed in such a manner that the But the sensor is installed in the glass window is actually used as a transmission medium for (ultrasound) waves. Since it is air, it is not absolutely necessary.

For example, as can be seen in Figure 1I, downstream of the sensor S, - or a sufficiently increased an amplifier V capable of widening the width, and an RC element for generating an envelope of the received signal. A demodulator with a An evaluation microprocessor-P with a - controls, for example, a relay R for triggering an alarm by a horn L, and and/or to be on the safe side, the vehicle's ignition system, A starter or similar device can also be used as a motion underlay. amplitude, time and The evaluation of the signal obtained in this way by the processor P according to the frequency is in particular , which improves the reliability of monitoring glass areas and spaces.

Using the invention, disturbing effects can be suppressed or avoided relatively easily. , extraneous noise in the ultrasonic range from the surroundings, here the surroundings of the car, is is significantly attenuated by the lath window, so that the corresponding signals are particularly If the corresponding level evaluation is performed by processor P, The signals taken are far from available. In addition, reliability of monitoring equipment The characteristics determine the received signal received by the sensor in terms of amplitude, time and frequency. Further improvements can be made by separating and evaluating the results.

Automatic It is also an advantage of the present invention that cable expenses in the vehicle are also lower. In addition, in principle monitors all windows of the car with just one sensor. It is even possible to tar. This device is thus particularly simple and its As explained before, it is cheap and even has high reliability, drawn The sensor S of this window break monitoring device also has considerable applications. It can also be used in the car example just depicted. sensor - S - formed, for example, by a microphone - can additionally serve as a receiving element, e.g. i.e. as a component of acoustic radar equipment, i.e. to increase spatial security, for example. of Doppler effect radar devices that add or do not utilize Doppler effect. It can operate as a receiving element of a pulse echo device.

From the previous description of the illustrated embodiment, it follows that the space to be monitored after all All windows can be monitored, at least in principle, by just one sensor. It is also understandable that the expenses are particularly low since it is possible to .

Additionally, from the description, each sensor has a standard window in the ultrasonic range. If you want to monitor the damage vibrations, you should check the symptoms generated when the window is damaged. It is also already understood that seminal, particularly high frequency sounds may be used.

Furthermore, a further advantage of the invention is that the sensor S If you are monitoring acoustic vibrations, avoid the mistake of not detecting window damage. The point is that it is possible. As a result, the automobile window Experiments have shown that if only frequencies below 100 KHz are used. , especially if the intruder somehow dampens the vibratory nature of the window breakage. In such cases, window damage may go undetected.

at least one sensor with directionality C, i.e. sensitivity that varies depending on direction; If a sensor with is used in the monitoring device according to the invention, then In that case, if the sensor has a directionality C as shown in FIGS. -S caused by damage to the far window area to be monitored. - such as at approximately 109 KHz. Some damping of the acoustic energy by the transmitting air in the case of high ultrasonic frequencies If there are any, they are generally few (and therefore close to with an equally high sensitivity as the acoustic vibrations caused by the breakage of the window area. -That is, if the lobe of directivity C points toward a distant window, then The sound produced by those windows is greater than the sound produced by the nearby windows. is also damped more by the air inside, but – a single sensor is not enough. (Even if the number of windows to be monitored is very large, and in addition Some of the windows to be scanned are close to the sensor and others are close to the sensor. in all windows of the space to be monitored, even if they are very far from the It is possible to make the reliability of the monitoring device almost equally high. .

In the automobile monitoring device according to the present invention, if the file represented as GF is If the sensor can be installed near the upper edge of the windshield, it will be useful for the car. This is a particularly advantageous solution: for example, sensors and Obstacles such as headrests between the vehicle and the window can be easily removed. addition This makes it more attractive to intruders than if the sensor were mounted on the lower edge of the window. That makes it even more difficult to destroy the window and sensor at the same time. Ru. Additionally, the sensor may be located in the base of the rearview mirror or It is also possible to install it within the interior lighting system installed in the This can be achieved without any particular hindrance to a design that looks good.

However, in the vehicle monitoring device according to the present invention, if If mounted near the upper edge of the glass, it will also A new solution is achieved in which the sensor is also installed completely within the roof covering the car. It can be installed without compromising aesthetics and thus, for example, sensors and objects to be monitored. Obstacles such as headrests between windows can be avoided just as easily. Ru. In addition, this arrangement allows the sensor to be mounted on the lower edge of this window. It is easier for an intruder to destroy the window and sensor at the same time. Even more difficult.

The respective sensors shown in Figures 3 and 4 are designated as GF, GH. mounted in the center of the upper edge of each window. For example, it is additionally possible to use a sensor with mirror-symmetric directivity C, which is easy to manufacture. That is, for example, the directivity C is as shown in FIGS. 3 and 4. Such sensors usually form two slightly overlapping lobes; This is particularly easy to manufacture.

IG 1 Procedural amendment (voluntary) October 11, 1991

Claims (10)

[Claims] 1. Multiple windows and side and/or upper walls surrounding the windows. windows (GF, GV, For example, the window for monitoring GS, GK, GH, GD) is damaged. at least one sensor (S) capable of detecting vibrations that typically occur when monitor equipment for monitoring the interior of a vehicle for intruders. The sensor (S) is located inside the room (I) and/or on the wall (W) of the space (I). ), in each case the respective sensor (S) is substantially A window that should be monitored so that only vibrations transmitted through the room air can be received. - (GF, GV, GS, GK, GH, GD) and typically occurs when a window is damaged and indoors ( I) of those sensors (S) capable of detecting acoustic vibrations transmitted by the air; the number of windows (GF, GV, GS, GK, GH, GD), i.e. windows (GF, GH, GK) and/or door windows to be (GV, GS) and/or less than the number of roof windows monitoring device. 2. All windows (GF, GV, GS, G) of the space to be monitored (I) K, GH, GD) are monitored by only one sensor (S). The monitoring device according to item 1. 3. such that each sensor (S) monitors vibrations in the ultrasonic range. , a monitor device according to claim 1 or 2. 4. The sensor (S) monitors acoustic vibrations exceeding 100 KHz. The monitoring device according to item 3 of the scope of demand. 5. Directivity (C), i.e. sensitivity that varies depending on direction, at least In a monitoring device with one sensor (S), The far window region to be monitored by it (S) (GH, G in Fig. 3) In case of damage to K; GF, GV in Figure 4, it (S) is monitored by it (S). The nearby window area to be targeted (GF, GV in Figure 3; GH, GK, in Figure 4) at least generally as high as that which it (S) would receive in the event of a failure of GS). in such a way that it is received as an acoustic vibration to be monitored by it (S). , the sensor (S) receives the acoustic vibrations to be monitored by it (S). according to one of the preceding claims, having a directivity (C) capable of A monitoring device according to claims 2 and 4, if possible. 6. Each sensor (S) is located near the upper edge of the windshield (GF). as claimed in one of the preceding claims, preferably as attached. For monitoring the interior of a vehicle (I) as described in paragraphs 2, 4 and 5 of the preceding paragraphs. monitoring equipment. 7. Each sensor (S) is installed near the upper edge of the rear glass (GH) as claimed in one of the preceding claims, preferably in the second claim, such that A monitor for monitoring the vehicle interior (I) as described in paragraphs 4 and 5. equipment. 8. Each sensor (S) is above each window (GF, GH) Claims 6 and/or 7, such as being attached centrally to the edge. Monitor device included. 9. The sensor (S) at least sometimes and in each case The microphone of the acoustic radar device can be additionally configured and for this purpose In order to A monitoring device according to one of the preceding claims, as used at a frequency of Place. 10. Claim No. 1, in which the radar device additionally makes use of the Doppler effect 9. The monitoring device according to item 9.