WO2010111926A1

WO2010111926A1 - Detection device and detection method thereof

Info

Publication number: WO2010111926A1
Application number: PCT/CN2010/071327
Authority: WO
Inventors: 邱亮南; 沈彤
Original assignee: Qiu Liangnan; Shen Tong
Priority date: 2009-04-03
Filing date: 2010-03-25
Publication date: 2010-10-07
Also published as: CN101515042A; CN101515042B

Abstract

A detection device distinguishes at least two independent detectable blocks in a detection area. When an object enters the detection area and reflects detection medium sent by a signal emission source (1), a receiving element (2) receives the reflected detection medium and feeds the received signal back to an analysis and control circuit (4). The analysis and control circuit (4) identifies and processes signal characteristics and reflection orientation of the received signal, and then outputs the received signal through an output interface circuit. As the detection device can accurately identify the signal characteristics, and can analyze and judge multiple messages such as size, direction/speed/angle of motion and the like of the object entering the detection area, the detection device can be used for intrusion detection to avoid false alarm, and can also be used in various fields such as production process supervision/quality monitoring and the like.

Description

Detection device and detection method

[Technical Field]

The present invention relates to a detecting device, and more particularly to a reflective detecting device using an acoustic/optical medium for a signal transmitting source and a method for realizing the detecting.

【Background technique】

The windows and balconies of buildings are vulnerable to intrusion. There are several types of electronic protection technologies commonly used: First, reed-type magnetoelectric sensors, which are reliable anti-intrusion detection devices for doors and windows, and have lower prices. There is a basis for universal application, but since the intrusion detection function can only be realized when the door and the window are closed, the practicality is greatly limited, especially in the tropical and subtropical buildings, under the practical application conditions in which the windows are often opened. It is difficult to play its preventive role; the second is the passive infrared detector, which can prevent the door and window. However, due to the thermal sensing principle, there are not only the interference with the same heat source of the sensitive frequency of the thermal element such as pets and sunlight. The shortcomings of false alarms; at the same time there are still achilles weak points that can only be installed indoors, which fundamentally restricts the practical value and popularity of this kind of products; Third, the traditional active infrared intrusion detectors, single bundle, double bundle , four bundles and other types, although the use is more reliable and the price is not too high, but its working principle is Infrared beams are the same frequency, the same modulation, requires a warning signal only when all of the infrared beam is blocked, so that its narrow defense, intrusion prevention unsuitable for windows, balconies and other parts. Chinese Patent No. 99117200. 0 discloses an (active) infrared anti-theft device that uses each beam modulation to encode a completely different infrared beam to prevent it. It can be installed on an outdoor wall to effectively prevent windows and balconies, but due to its appearance with the building. The shape has conflicts in look and feel, and the installation operation is inconvenient, so that its popularization and application is affected; Chinese Patent No. 00117362. 6 discloses another reflective (active) infrared anti-theft device, which includes the same side as the infrared emitter. Infrared receiver, when the infrared receiver receives the infrared light reflected by the surface of the invading object and has the same code as the emission, the detector sends an alarm signal, and the reflective infrared detector is installed relative to the infrared detector of the opposite type. Convenient, it has little influence on the appearance of the building, and can effectively prevent the door, window, balcony or passage. However, the detector of this structure will alarm if it detects the reflection of an object with the same code as the emission, so that it is in the prevention area. Insects flying inside, zone Mice and other small animals in the event of back-reflected infrared will cause false alarms, their effectiveness is not ideal.

Therefore, it is necessary to provide a detecting device which is simple in structure, easy to install, and high in detection accuracy.

[Summary of the Invention] The object of the present invention is to provide a detecting device with a simple structure, an easy installation, a strong detecting capability, and a high detection accuracy, and a detecting method thereof.

In order to achieve the object of the present invention, the following technical solutions are provided:

Providing a detecting device that distinguishes at least two different independent detectable blocks in the detection area, when the object enters the detection area and reflects the detection medium emitted by the signal transmission source, the receiving component receives the corresponding The detection block is reflected by the detection medium, and the received signal is fed back to the analysis and control circuit. The analysis and control circuit recognizes and processes the received signal and outputs it by the output interface circuit.

The analysis and control circuit is a detection medium output capable of controlling a transmission source to generate a predetermined characteristic signal, and can compare the received signal characteristics, and can perform analysis on the timing of receiving the effective reflection medium and the orientation of each detectable block, and can output A combination of various types of analysis tips or data or images.

The signal transmitting source of the detecting device emits a single-frequency acoustic/optical detecting medium, including ordinary light/laser of any frequency in the full spectrum, sonic/ultrasound of any frequency in the entire band. Wherein the transmitting source emits a single frequency of detecting medium, and the corresponding receiving element is only sensitive to the same frequency of the corresponding medium emitted by the transmitting source. This makes the detection device have the characteristic of resisting signal interference at different frequencies than the specific frequency. In order to further resist interference between signals of the same frequency, the detection medium emitted by the transmission source has, in addition to its fundamental frequency characteristics, other specific and/or random signal characteristics based on the fundamental frequency.

According to actual needs, the same medium, the same or different signal characteristics of the transmission signal source can be selected in the same detection device; also can use different medium, the same / different signal characteristics of the signal transmission source; can also use the above two or more Any combination of media and signal sources of the same/different signal characteristics.

The receiving component is a photosensitive device and/or an acoustic receiving device having the same medium and corresponding frequency response as the signal transmitting source, such as a photodiode/transistor, an array photosensor such as a CCD/CMOS device, various types of microphonic receiving devices, and electrostatic standing. Polar body devices, various piezoelectric ceramic devices, and various types of array piezoelectric ceramic devices.

In the same detecting device, when the receiving/transmitting elements of the independent optical/acoustic medium are used, the proportional relationship may be 1:1, l: n, or n: l, or m: n _; where m 2, n 2. In order to prevent false alarms caused by mutual interference, the fundamental frequency of the various types of detection medium receiving/transmitting devices should be single and corresponding to each other.

The detecting device realizes the division of the detection area by various technical solutions. For example, the apparatus can adopt at least two receiving elements corresponding to different orientations and at least one transmitting source, thereby dividing the detecting area into at least two different independent ones. Detecting blocks; or alternatively, at least two sources of different pointing and different signal characteristics and at least one receiving element may be employed, thereby dividing the detecting area into at least two different independent detectable blocks. On this basis, the device can be further optimized, such as using a plurality of receiving elements corresponding to different orientations and a plurality of different pointing and different signal characteristics. The source, the row arrangement or the column arrangement or the array arrangement, thereby dividing a plurality of rows of independent or detectable blocks arranged in rows or arrays in the detection area; Receiving components such as CCD/CMOS devices, array piezoelectric ceramic devices, etc., directly divide the detection area into corresponding array-shaped blocks.

When there are multiple signal transmitting sources in the same detecting device, the analyzing and controlling circuit can control each signal transmitting source to emit the detecting medium in a timely manner in a prescribed order; the analyzing and controlling circuit controls the detecting medium emitted by the signal emitting source except the base In addition to the wave frequency characteristics, other specific and/or random other signal characteristics based on the fundamental frequency characteristics, such as frequency modulation, amplitude modulation, phase modulation, coding, and the like, and signal characteristics generated by various known modulations and their mutual Arbitrary, random combinations to avoid misjudgment by interference from other signal sources of the same/different signal characteristics of the same/different type of media used at the same time.

The detecting device may further comprise a signal receiving orientation constraint, the signal receiving orientation constraint being a device having a plurality of detecting medium channels, the device capable of passing the reflected detecting medium, forming a channel with the detecting medium in the detecting region Corresponding mutually independent detectable blocks allow only the reflected detection medium whose reflection direction in the detectable block coincides with the detection medium channel to pass through the receiving element. The detecting medium passage may be a parallel-spaced slot, an optical lens, a gap formed by an acoustic wave blocking/absorbent material, etc., and a simple embodiment is: the plurality of detecting medium channels are a plurality of parallel-shaped elongated shapes. The medium passage may include a straight or curved or folded shape in which the shapes are the same as each other.

The signal receiving directional constraint forms a plurality of mutually independent detectable blocks for the reflected detecting medium, and is only allowed to be reflected back along the mutually independent detectable blocks and the reflecting direction is consistent with the detecting medium channel. The detection medium enters, and the mutually independent detectable blocks may be planar layered blocks, curved layered blocks or folded layered blocks corresponding to the shape of the detecting medium passages, and the like. When the measured object is larger than the spacing of any two adjacent detectable blocks, and when the object passes through the two detectable blocks at the same time, the signal reflected by the surface of the object may pass through the detecting medium channel of the signal receiving directional restraint The receiving elements corresponding to the two adjacent detectable blocks are simultaneously received.

The signal receiving orientation constraint can adjust the angle and/or relative position of at least any two adjacent detection medium channels to adjust the angle and/or relative distance between the two detectable blocks to accommodate different detection requirements.

In a simpler solution, the receiving elements are respectively disposed behind two parallel detecting medium passages (through slots), and the through slots define the receiving range of the detecting medium as two mutually independent plane layers. The detectable block, when the object entering the detection area passes through the first planar layered detectable block, the reflection generated on the surface can pass through the corresponding transparent groove; when the object entering the detection area is larger than the two independent When the plane layered detectable blocks are spaced apart and simultaneously pass through the two independent planar layered detectable blocks, the reflections generated on the surface thereof can be simultaneously passed through the corresponding two through slots respectively. The corresponding receiving component receives. The permeable trough can also be similar to other functions that can perform this function. The device is an optical lens shaped like a concave column, a slit having a narrow shape in which a strip-shaped acoustic wave absorbing object is arranged in parallel, and the like.

A simpler solution 2, using at least two different directed and different signal characteristics of the emission source and at least one receiving element, wherein the transmitting source adopts a concave-shaped optical lens or the like of the device for focusing the detecting medium, so that The emission angle of the emission medium is small, so that at least two different planar layer-like detectable blocks are formed in the detection area. When an object enters a detectable block in the detection area, the reflection generated on the surface causes the detection medium received by the receiving element to have only one signal characteristic; when the object entering the detection area is larger than the two different detectable blocks And when the two different detectable blocks are simultaneously passed, the reflection generated on the surface thereof enables the detecting medium received simultaneously by the receiving element to have the characteristics of the two different signals.

In a preferred embodiment, the receiving component is arranged in a plurality of rows/columns, and each row/column is provided with a plurality of signal transmitting sources (for example, laser beams) having the same frequency, different pointing directions, and a small divergence angle of the medium. When the object passes through different detectable blocks in the detection area, only the medium corresponding to the block signal transmission source can be reflected, and the signal source of the peer/column can adopt the same frequency of different modulation and/or random signal characteristics. Detection medium; different row/column signal transmission sources have different frequencies or mediums; the analysis and control circuit can judge the passage of the detected object according to the difference between the signal medium, the fundamental frequency, and other signal characteristics received by the receiving component. The block is detected, and the interaction between the detection signals of each detection block in each row/column and in the peer/column can be excluded. Further, a plurality of signal transmission sources corresponding to different detectable blocks and different frequencies or mediums may be respectively disposed corresponding to different detection blocks of each row/column (wherein one signal can be configured for one detectable block) The transmitting source can also be configured with two or more different media but the same pointing signal transmitting source), and at the same time, a plurality of receiving elements corresponding to the signal transmitting source and the same fundamental frequency are arranged to improve the reflective area of the measured object, Accuracy and reliability of judgments such as direction of motion/speed. In the above configuration case with various signal transmission sources, the analysis and control circuit can also control different signal transmission sources to be transmitted one by one in a prescribed order, further reducing the same medium signal corresponding to signal transmission sources of different detection blocks. Interfering with each other while saving energy.

As an embodiment to achieve more accurate detection requirements, accurate detection of personnel intrusion to a building located in the field requires that personnel be distinguished. Because of the high precision of detection, the receiving component adopts an array arrangement device, such as a camera of CCD or CMOS device, and each imaging pixel in the CCD or CMOS device is a receiving component, wherein the transmitting source can adopt some kind of A laser array of wavelengths performs overlay emission of the entire detection area; in order to achieve selective reception of the single wavelength reflection medium, the lens of the camera can be attached with a high-pass filter or filter of the same wavelength as the laser. In this embodiment, the source and the receiving element are not in a 1:1 configuration. In this embodiment, since the transmitting medium adopts a laser of a certain wavelength (for example, a near-infrared wavelength of 850 nm), the reception should adopt a high-pass filter of 850 nm wavelength, which has a distinct use effect compared with the conventional camera of the prior art, and the comparison is as follows: . Ordinary cameras passively receive external visible light The spectral medium obtains a signal of the total visible spectrum of its corresponding block on each receiving element, thereby generating an extremely complex image. For the analysis and control circuit, in order to realize the analysis of the reception result, the prior art adopts Image analysis software for comparison, analysis, and identification. However, the possibility of similar images (graphics) in the environment is extremely high, such as changes in sunlight over time or through clouds, changes in terrain/plants/buildings, wind-driven plants, etc. Under the combined effect of these effects, a large number of figures similar to the human body may be produced. In order to cope with the analysis of such complex problems, the software/hardware cost of the analysis and control circuit increases sharply while the software operation time is prolonged. Moreover, with the current level of software/hardware technology of the analysis and control circuit, environmental factors cannot be ruled out. Judge. In the prior art, the analysis and control circuit can also use the background comparison method to eliminate redundant and useless environmental information. However, due to the complex and random changes in the sun/illumination angle/sunlight intensity/wind direction and intensity with time/season/meteorological/period, the background image is difficult to be effective in the same background. In the prior art, there is also a camera with an expensive array of passive infrared receiving devices, which realizes the identification of intruders by the characteristics of temperature radiation at night; but in the daytime sunlight, especially in the hot season, the temperature is strong, the temperature is Large-area object reflection temperature, large-volume objects (concrete buildings, etc.) Radiation temperature after heating, cloud movement to block sunlight, etc., forming a variety of heat-source interference sources, making this technology impossible to achieve accurate detection. In this embodiment, since the laser of 850 nm wavelength which is invisible to human vision is used as the detection medium, the interference caused by the light source of the full visible light band is completely eliminated, and other specific/random signals based on the wavelength of 850 dishes in the laser beam are further eliminated. Features, can eliminate the interference of 850 dishes of infrared radiation in the sun; select the appropriate laser intensity according to the detection range, in the camera image at this time, the distant object can not produce sufficient intensity of reflection, and will not affect the receiving component Close-range fixed objects can be easily identified as backgrounds, and only movable factors such as targets, wind-blown plants, and small animals need to be distinguished and identified. Since most of the interference factors are excluded, the analysis and control circuits are only required. Comparing the area/shape/movement characteristics of the components receiving the effective medium in the CCD or CMOS array device, it is possible to judge whether there is any human intrusion, because the solution makes the analysis and control circuit work significantly less difficult, so that it can be used Lower cost software/hardware combination, fast and accurate Intrusion detection.

The above various signal transmission sources can also adopt the method of adaptively adjusting the intensity (disclosed by the intelligent adjustment method of the Chinese invention patent ZL200610033099. 0 infrared security net), so that the emission intensity is automatically adjusted to the change of the intensity of the interference source in the environment to best value.

As a preferred embodiment, the apparatus may further employ an electronically controlled gate selectively opened by the analysis and control circuit as a signal receiving orientation constraint, the electronically controlled gater comprising a plurality of light channels arranged in an array/ a sound-passing unit, such as an array of LCD light-passing modules, is controlled by an analysis and control circuit for each of the light-passing units to be gated one by one or in a row/column according to a predetermined sequence, and received in accordance with the gate sequence, in combination with the receiving component Signal timing and other signal characteristics can be determined to enter the probe The area of reflection of the object in the area, the direction of motion, the speed of motion, etc., and the gating method is relatively energy efficient due to time division gating.

The method for detecting by the detecting device of the present invention comprises the following steps: analyzing and controlling a circuit control signal transmitting source to emit a detecting medium, the detecting medium being reflected by an object entering the detecting area and received by the receiving element, and the receiving element receiving the signal The feature is fed back to the analysis and control circuit, and the analysis and control circuit analyzes the signal characteristics from each of the receiving components and outputs the analysis result. When the receiving elements corresponding to at least two arbitrarily adjacent detectable blocks simultaneously receive the effective reflective medium, or the effective reflective medium received by the receiving element includes at least two different signal characteristics of any adjacent detectable block, The analysis and control circuitry can generate (alarm status) prompts. The analysis and control circuit can also calculate one or any combination of the rough size, the moving direction, the average moving speed, and the like of the projected object in a plane perpendicular to the reflection direction according to the received information, and the analysis result is Output interface circuit output: If the status is prompted by buzzer, relay, etc., or output by data.

Different state levels can be set according to the needs of different occasions, for example: When the effective reflection medium is received by the receiving elements corresponding to t any adjacent detectable blocks, the analysis and control circuit will make a preliminary prompt (warning state) or The corresponding data is output, and when the effective reflective medium is received by the receiving component corresponding to t+s arbitrary adjacent detectable blocks, the analysis and control circuit processes the formal prompt (alarm status) or outputs corresponding data, where tl, s ^ l ₀ or an effective reflection medium having t signal characteristics of any adjacent detectable block is received by the receiving component, and the analysis and control circuit will make a primary prompt (warning state) or output corresponding data, and when there are t+s The effective reflection medium of any adjacent detectable block signal characteristic is received by the receiving component, and the analysis and control circuit processes the formal prompt (alarm state) or outputs corresponding data, where tl, s ^ l ₀

According to the comparison and analysis, the analysis and control circuit can know how many receiving components receive the effective reflective medium, or know how many effective signal reflections include the signal characteristics corresponding to the detectable block, according to the timing of receiving the effective reflective medium. Combining the information of the receiving elements corresponding to the respective detectable blocks and/or the orientations of the respective signal transmitting sources, the distance between each other, etc., through calculation and analysis, the reflection area and the entering direction of the object entering the detecting area can be obtained through calculation and analysis. Practical information such as running angle and average speed. The analysis result can be output through the output interface circuit, such as output status signal/tip, or output analysis data related to the detection. In the configuration of sufficient detection resources (signal emission source/receiving device with small emission angle and sufficient number and corresponding detection media with specific signal characteristics), the detection method can realize the moving direction, reflection area, More accurate detection and calculation of one of the elements of the average moving speed / any combination. When the receiving component is an array device, since the detection density is sufficiently large, the analysis and control circuit can display a two-dimensional image of the object entering the detection area on the image display. The analysis and control circuitry may add specific and/or random other signal characteristics based on the fundamental frequency characteristics to the detection medium emitted by the signal source. Different modulation methods may be used to make the signal source signal have other signal characteristics based on the fundamental frequency, such as frequency modulation, amplitude modulation, phase modulation, coding, and the like, and various arbitrary and random signals. The combination and so on. The analysis and control circuit adopts a recognition method for comparing the signal characteristics transmitted by the receiving component with the signal characteristics of the detecting medium emitted by the signal transmitting source, that is, the signal characteristic of the signal emitting source is unique, and is judged as an effective reflecting medium, thereby avoiding Misidentification of other sources and external sources of interference ensures that the possibility of misjudgment is extremely low.

Compared with the prior art, the present invention has the following advantages:

The invention has simple structure, and the information of the reflection area of the entering object is detected by dividing the detection area into at least two different detectable blocks, and the analysis and control circuit determines the reflection medium received by the receiving element by comparing the signal characteristics of the transmission/reception signal. The effectiveness of the invention can effectively avoid misjudgment; the invention can also analyze the movement direction, running angle, average speed, and even object graphics of the object entering the detection area, and thus may also be applied to the production process for the batch product size / Other areas such as shape screening, process monitoring, etc. The detection device of the invention is convenient and practical, and has the advantages of easy installation, wide application range, strong detection capability and high detection accuracy. [Description of the Drawings]

1 is a schematic diagram of the principle of the detecting device of the present invention;

2 is a schematic diagram of an intrusion detection application of a detection device of the present invention;

Figure 3 is a cross-sectional view of the signal receiving orientation restraint in the detecting device of the present invention;

4 and FIG. 5 are schematic diagrams showing another application example of the intrusion detection of the detecting device according to the present invention;

Fig. 6 is a schematic view showing a third application example of the detecting device of the present invention.

【detailed description】

Referring to FIG. 1, the detecting device of the present invention comprises a signal emitting source 1, three parallel detecting medium passages (through slots) through which the reflected detecting medium can pass, and each detecting medium passage (through slot). Correspondingly, a receiving component 2 is disposed. The signal transmitting source 1 can adopt an infrared emitter, and only one signal transmitting source can be used, or one or more signal transmitting sources are disposed corresponding to each receiving component, and the receiving component 2 adopts a signal transmission. The infrared receivers with the same fundamental frequency are installed on the rear sides of the three parallel detection medium channels (through slots), respectively, and the objects can be received through the three detection medium channels (through slots) 3 When the planar shape is detectable, the infrared medium is reflected back. Both the signal transmission source 1 and the receiving element 2 are connected to the analysis and control circuit 4, and the analysis and control circuit 4 can be controlled by an adaptive method. The intensity of the power driver, the driving signal source 1 emits a specific fundamental frequency, the infrared medium of the specific/random modulation signal characteristics.

If an object enters the detection area, the detection medium emitted by the signal transmission source 1 is reflected, wherein the detection medium passing through the detection medium passage (through slot) 3 reaches its corresponding receiving element 2, and each receiving element 2 receives and responds thereto. When the infrared medium of the same frequency is transmitted to the analysis and control circuit, the analysis and control circuit compares the signal characteristics of the received infrared medium, and when the signal characteristic is identical to the signal characteristic of the signal transmission source, it is determined to be effective reception, and Analysis of other detection characteristics and data calculation processing are performed, and the conclusion is outputted by an output interface circuit of the analysis and control circuit, and the output interface circuit can be connected to a buzzer, a relay, an acoustic/light indicator, or a data exchange interface circuit.

The signal source 1 can also use ordinary light/laser, sonic/ultrasonic medium and the like at any frequency in the spectrum such as visible light and ultraviolet light, and select one of them according to actual needs, or two or more kinds of signal source mediums and other Any combination of different signal characteristics. The receiving element 2 employs an acoustic/light receiving device corresponding to the signal source characteristics and response frequency.

2 and FIG. 3, FIG. 2 is a side view showing the detection device 10 of the present invention applied to intrusion detection on a residential window, and FIG. 3 is a cross-sectional view of the signal receiving orientation restraint 5 in the detecting device of the present invention, which shows The relationship between the detecting medium channel and the corresponding mutually independent detectable block; below the three receiving elements 2 of FIG. 3, the signal receiving orienting constraint entity portion is divided into three parts, and the parts are connected by an arc 11 The portions can be rotated relative to the arc 11 to change the angle between the three detecting medium passages to change the angle between the detectable blocks. The detecting device 10 is installed on the top of the window. According to the size of the window and the application requirements, the angle between each detectable block can be adjusted, and the processing procedure of the analysis and control circuit is set as follows: Any two adjacent detectable blocks correspond to each other. The receiving component outputs an alarm signal when receiving the effective reflective medium at the same time, and can also set a receiving component corresponding to a detectable block to output an early warning signal when receiving the effective reflective medium, and the analysis and control circuit can be corresponding to each detectable block. The receiving component receives the timing and time difference of the effective reflective medium, calculates the in/out direction and speed of the object, and can output the data in a manner such as data. The specific process is analyzed as follows.

When the object 20 or 30 is at a position a or b far from the guard area (window), the intensity of the reflected signal is too long to cause a false alarm, and on the other hand, due to the existence of the adjacent detectable block An angle, at a distance of a long distance, the volume of the object 20 can only reflect the effective reflection medium to the receiving element corresponding to the first detectable block; when the object 20 is in the left position of the first detectable block in the figure, No receiving element can receive the effective reflective medium, so any object outside the detection area (window) will not generate any level of alarm; when the object 20 moves through the first detectable block to the map When the c position is shown, since the receiving elements corresponding to the first and second detectable blocks respectively receive the effective reflection medium due to the small size, an alarm is not generated, and the program can be set to be issued for the case. An early warning signal; when the object 20 continues to move toward the window at the c position to the d position, since the receiving elements corresponding to the second and third detectable blocks can be simultaneously received Reflecting medium, so the analysis and control circuit outputs an alarm signal; and object 30 is not in position a If the receiving elements corresponding to the first and second detectable blocks can simultaneously receive the effective reflective medium, no alarm is generated; since the volume of the object 30 is larger than the object 20, the first position can be made at both the c and d positions. The receiving elements corresponding to the second/second and third adjacent detectable blocks simultaneously receive the effective reflective medium, thereby triggering an alarm; and the object 30 can be detected to the second and third at the b position. The receiving component corresponding to the block reflects the effective reflective medium at the same time, but because the distance is far, the reflective medium cannot reach the receiving component and does not cause an alarm; the object 30 moves upward from the b position, and once the height of the window sill is crossed, the reflection intensity can trigger an alarm. . For a smaller volume of objects 40, such as flies, small animals moving on the window sill, etc., because of the angle of reflection they produce, the receiving elements corresponding to any two adjacent detectable blocks cannot simultaneously receive the effective reflective medium, and never An alarm will be generated. This solution overcomes the shortcomings of the prior art to cause false alarms caused by small object reflections, and improves the alarm accuracy. In this embodiment, the objects 20 of different sizes and the object 30 have different reactions in the same part of the window, which embodies the adjustment of the angle between any two detectable blocks, and can realize the selection of the intrusion prevention part and the volume of the invading object. And control functions.

It can be seen from Fig. 3 that each detectable block should overlap after extending to a certain distance. Theoretically, in the overlapable area of the detectable block, a small object can simultaneously correspond to the two different areas. The receiving element of the block is reflected back to the effective reflection medium, which may cause misjudgment; however, in the expression of Fig. 3, when the detectable blocks overlap, the distance detecting device is already far away, and the intensity of the medium reflected back is very weak, and it is impossible to be Receiving; therefore, as long as the angle between any two detection medium channels is adjusted, the detection blocks are independent of each other within the detection area, and it is possible to selectively prevent small objects from causing false alarms.

In addition, in practical applications, such as application in a residential balcony, the determination and control circuit determination procedure can be set as needed: According to the order in which the receiving elements corresponding to the respective detectable blocks receive the effective reflective medium, the object moving direction is determined. The reflection sequence does not give an alarm within a certain period of time from the inside to the outside (corresponding to the owner of the house coming out of the balcony), and once the object is judged to be externally entered, the alarm signal is immediately output.

Figure 4 and Figure 5 show another application of the detection device installed in the window for intrusion detection (since the installation orientation is different from that of Figure 3, the angle between the detectable blocks is also different from Figure 3) The prevention of window intrusion is implemented. When the receiving elements corresponding to the first and second detectable blocks respectively receive the effective reflective medium, the detecting device enters a primary early warning state, for example, the object 60 in FIG. 4 only enables the receiving component corresponding to the first detectable block to receive The effective reflection medium, the detecting device enters the primary early warning state, but the object 60 is small in volume, so that the receiving elements corresponding to the two adjacent detectable blocks do not receive the effective reflecting medium at the same time, thus avoiding misjudgment; When the receiving component corresponding to the second detectable block receives the effective reflective medium at the same time, it enters a high-level early warning state (corresponding to the normal moving pedestrian or the intruder of the outside), for example, the two position states of the object 50 in FIG. 4, detecting The devices all enter an advanced warning state; when the receiving elements corresponding to the first, second, and third detectable blocks simultaneously receive the effective reflective medium, enter an alarm state, such as the object 50 in FIG. Position status (equivalent to the body part of the person's upper body has entered the window frame, forming an invasion.), the three receiving components receive the effective reflection medium, the detection device enters the alarm state; corresponding to different alarm conditions, the detection device Different data can be output. The device can be effectively applied to intrusion detection of building windows, balconies and the like, and the false alarm rate is almost zero.

There is another application example of the device as shown in Fig. 6 (only the scene seen from one side is shown), the separate receiving elements are arranged in an array, and each receiving element is provided with a transmitting source, which emits The source and receiving elements are directed vertically downwards, and the object 70 moves from the left side to the right side of the figure. When the e position is reached, the analysis and control circuit can receive the corresponding receiving elements corresponding to the two adjacent rows of detectable blocks on the left side. The medium is reflected by the reflection medium (the position between the adjacent two receiving elements can be adjusted according to the size of the object and the needs of use, thereby changing the selection criteria for the length/width of the object). When the object continues to move, such as moving to the f position, the analysis and control circuit can determine the direction in which the object moves, and calculate the average moving speed of the object according to the time it takes for the object to move from the e position to the f position. The length or area of the object is roughly determined based on how many receiving elements receive the effective reflection medium reflected by the object. By judging the time and sequence of receiving the effective reflective medium by each receiving component, combining the spacing distance between the respective detectable blocks and the specific positions of the receiving components corresponding to the detectable blocks arranged in each row, etc., The control circuit can determine various information such as the rough length or area, the running angle, and the average passing speed of the object in the detection area, so that the detecting device can also perform screening and quantity statistics on the object passing through the channel (according to the predetermined size). Etc. Therefore, the present invention can also be applied to production process control, supervision, etc., and thus has a wide application prospect.

The detecting device further comprises: comparing, by the analyzing and controlling circuit, the signal characteristics of the received reflective medium, when the received signal characteristic is identical to the signal characteristic of the signal transmitting source, determining that the receiving is effective, due to the signal of the signal transmitting source It can have many different signal characteristics such as arbitrariness and randomness of various modulation modes in selection and combination, which greatly improves the detection accuracy and makes the theoretical false alarm rate of the device zero.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any equivalent transformation based on the technical solution of the present invention is within the scope of the present invention.

Claims

Rights request

A detecting device, characterized in that the detecting device distinguishes at least two independent detectable blocks in the detecting area, and when the object enters the detecting area and reflects the detecting medium emitted by the signal transmitting source, the receiving component receives the Corresponding to the reflected detection medium of the detectable block, and feeding back the received signal to the analysis and control circuit, the analysis and control circuit recognizes and processes the received signal, and then outputs it by the output interface circuit.

2. The detecting device according to claim 1, wherein the detecting medium emitted by the signal transmitting source is a single frequency light wave/sound wave/ultrasonic wave.

3. Detection device according to claim 2, characterized in that the detection medium has, in addition to its fundamental frequency characteristics, other specific and/or random signal characteristics based on the fundamental frequency.

4. The detecting device according to claim 2 or 3, characterized in that the device employs at least two receiving elements for different orientations and at least one transmitting source, thereby distinguishing at least two different independent ones in the detection area. A block can be detected.

5. The detecting device of claim 4, further comprising a signal receiving orientation constraint, the signal receiving orientation constraint being a device having at least two mutually independent detection medium channels formed in the detection region The mutually independent detectable blocks corresponding to the detection medium channel allow only the reflected detection medium whose reflection direction in the detectable block is consistent with the detection medium channel to be received by the receiving element.

6. The detection device of claim 5, wherein the signal receiving orientation constraint adjusts an angle and/or a relative position between at least any two adjacent detection medium channels to accommodate different detection requirements.

7. The detection device according to claim 2 or 3, characterized in that the device uses at least two emission sources of different pointing and different signal characteristics and at least one receiving element, thereby distinguishing at least two different in the detection area. Independent detectable block.

8. The detection device of claim 7, wherein the differently directed and different signal characteristics of the emission source can adjust an angle and/or a pointing and/or a relative position between at least any two adjacent sources. To adapt to different detection requirements.

9. The detecting device according to claim 2 or 3, characterized in that it comprises a plurality of signal transmitting sources of the same/different pointing and different signal characteristics and a plurality of receiving elements, the signal transmitting source and the receiving element being arranged in a row Or arranged in an array.

10. The detecting device of claim 9, further comprising an electrically controlled gate selectively opened by the analysis and control circuit, the electronically controlled gate comprising a plurality of light channels arranged in an array /Sound unit.

The detecting device according to claim 2 or 3, wherein the receiving element is a photosensitive device and/or an acoustic receiving device having the same medium and corresponding frequency response as the signal transmitting source.

The detecting device according to claim 2 or 3, wherein the receiving element is an optical and/or acoustic array receiving device.

13. A method for detecting a detecting device according to claim 12, characterized in that the detecting process comprises the steps of: analyzing and controlling the circuit control signal transmitting source to emit the detecting medium, when the detecting medium is entered into the detecting area When the object is reflected and received by the receiving component, the receiving component feeds back the received signal characteristics to the analysis and control circuit, and the analysis and control circuit analyzes the signal characteristics and the reflection orientation of the signals from the receiving components, and outputs the signals. Analysis results.

14. The detecting method according to claim 13, wherein when the detecting medium is reflected by an object entering the detecting area and is corresponding to a receiving element of any adjacent at least two independent detectable blocks, The analysis and control circuitry will prompt upon receipt, or when the receiving component receives an active probing medium containing at least two arbitrary adjacent independent detectable block signal characteristics.

15. The detecting method according to claim 14, wherein the detecting medium is reflected by an object entering the detecting area and received by a receiving element corresponding to at least one independent detectable block, or an object. An effective detection medium that reflects at least one of the independent detectable block signal characteristics is received by the receiving component, and the analysis and control circuitry will make another prompt.

16. Detection method according to claim 13, characterized in that the detection medium emitted by the analysis and control circuit control signal source has specific and/or random other signal characteristics based on the fundamental frequency characteristics.

17. The detecting method according to claim 13, wherein when the device is composed of a plurality of signal transmitting sources, the analyzing and controlling circuit can control each of the signal transmitting sources to emit the detecting medium in a predetermined order.