CN104424736A - Intrusion detection device and corresponding intrusion detection method - Google Patents
Intrusion detection device and corresponding intrusion detection method Download PDFInfo
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- CN104424736A CN104424736A CN201310407576.5A CN201310407576A CN104424736A CN 104424736 A CN104424736 A CN 104424736A CN 201310407576 A CN201310407576 A CN 201310407576A CN 104424736 A CN104424736 A CN 104424736A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
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Abstract
The invention relates to an intrusion detection device, which comprises a sensor for sensing a vibration signal and a microprocessor for analyzing and processing the vibration signal. The analysis and processing at least comprise the following steps: comparing a variable, reflecting the intensity of the vibration signal in real time, with a first threshold value, and outputting related information when the variable is equal to or greater than the first threshold value; comparing the variable with a second threshold value, enabling a counter to add 1 when the variable exceeds the second threshold value for at least one time in first time duration and the variable is always lower than the second threshold value in the second time duration, outputting the related information when the value of the counter reaches a third threshold value, and resetting the counter when the value of the counter is unchanged within a third time duration; and/or comparing the variable with a fourth threshold value, when the variable is always higher than a fourth threshold value in a fourth time duration, continuously analyzing and processing until the variable is always lower than the fourth threshold value in a fifth time duration, calculating the intrusion time duration from the end of the fourth time duration and the end of the fifth time duration, and outputting related information if the intrusion time duration is equal to or longer than a sixth time duration. Judgment errors and judgment omission can be decreased.
Description
Technical field
The present invention relates to a kind of for detecting the invasion pick-up unit and a kind of method of whether being invaded and harassed for the equipment detecting needs protection that need the equipment of protection whether to be invaded and harassed.
Background technology
Along with the development of society and the progress of technology, more and more equipment easily appears in our daily life, such as automobile, motorcycle, ATM (automatic teller machine) etc.These equipment need to install the antitheft and anti-invasion of warning horn usually, and when these equipment are damaged or invade and harass, warning horn can sense destruction and invades and harasses and send corresponding alarm, and such as give the alarm the sound.
At present, this warning horn is usually based on vibration transducer, and whether the vibration signal namely produced based on vibration transducer carrys out judgment device and be damaged or invade and harass.The detection method that existing vibration transducer adopts mainly contains two kinds: 1) preset a large threshold value, the vibration signal sensed by vibration transducer compares with this threshold value, indication equipment is subject to strong destruction or invasion when the threshold value is exceeded, now produces corresponding alarm immediately; 2) a relatively little threshold value is preset, also the vibration signal sensed by vibration transducer is needed to compare with this threshold value during detection, in order to reduce erroneous judgement, the number of times exceeding threshold value being counted simultaneously, only having when counting reaches certain predetermined value, just produce corresponding alarm.
No matter which kind of method, all relate to threshold value to compare, when threshold value sets too low, be easy to noise signal to be mistaken for and invade and harass or destroy and cause false alarm, even if for second method, although find in reality to reduce erroneous judgement to a certain extent by counting, but still reliably cannot distinguish noise signal and invade and harass signal, the probability of erroneous judgement is still relatively high.On the contrary, as threshold value setting get Tai Gao, can produce again and fail to report police, cause huge loss may to so corresponding equipment.Particularly, said method reliably can not go out lasting low-intensity invasion signal by analysis and resolution, such as, when equipment is subject to electric saw and electric drill attacks, because the invasion signal produced is very low all the time, although invade and harass last very long, also can produce and fail to report police.
Therefore, reliably can distinguish noise and actual invasion, minimizing erroneous judgement and the invasion pick-up unit of failing to judge in the urgent need to a kind of and invade and harass detection method accordingly.
Summary of the invention
Consider the above-mentioned defect of prior art, the object of this invention is to provide a kind of can reduce false alarm and fail to report alert reliable invasion pick-up unit and invade and harass detection method.
According to a first aspect of the invention, providing a kind of for detecting the invasion pick-up unit needing the equipment of protection whether to be invaded and harassed, comprising:
For sensing by the sensor invading and harassing the vibration signal caused; And
Microprocessor, it is suitable for vibration signal described in analyzing and processing;
Wherein, described analyzing and processing at least comprises:
-variable and predetermined first threshold that reflect the intensity of vibration signal are in real time compared, when described variable is equal to or greater than first threshold, invades and harasses pick-up unit and export relevant information; With
-Second Threshold low with predetermined ratio first threshold for described variable is compared, if on the first duration of timing when not reaching first threshold reaching Second Threshold from described variable described variable exceed Second Threshold at least one times and followed by described variable on the second duration of the first duration all the time lower than Second Threshold, then counter adds 1, when the value of counter reaches the 3rd predetermined threshold value, invade and harass pick-up unit and export relevant information, when the value of counter remains unchanged in the 3rd predetermined duration, then counter resets; And/or
-the 4th low with predetermined ratio Second Threshold for described variable threshold value is compared, if described variable is all the time higher than the 4th threshold value on the 4th duration of timing when not reaching Second Threshold reaching the 4th threshold value from described variable, then proceed analyzing and processing, until described variable on the 5th duration all the time lower than the 4th threshold value, and calculate from the 4th duration finish time to the invasion duration of the 5th duration finish time, if invade and harass duration equal or be longer than the 6th predetermined duration, invade and harass pick-up unit and export relevant information.
Preferably, described variable is the absolute value of the amplitude of vibration signal.
Preferably, described microprocessor obtains vibration signal by its serial peripheral interface from sensor; And/or described invasion pick-up unit also comprises the output unit for exporting described relevant information.
Preferably, described invasion pick-up unit also comprises detaching-proof protection switch, and described detaching-proof protection switch is suitable for preventing described invasion pick-up unit itself to be damaged; And/or described output unit comprises LED indicating member and/or warning horn, described LED indicating member is suitable for indicating the duty of invading and harassing pick-up unit, and described warning horn is suitable for giving the alarm when invading and harassing pick-up unit and invasion being detected.
Preferably, described sensor is acceleration transducer, and sample frequency is 2kHz; And/or described invasion pick-up unit also comprises the one or more adjustment setting device being suitable for setting and regulating in first threshold, Second Threshold, the 3rd threshold value, the 4th threshold value, the first duration, the second duration, the 3rd duration, the 4th duration, the 5th duration and the 6th duration.
Preferably, described first threshold can be selected from multiple predetermined value by described adjustment setting device.
Preferably, described 3rd duration is 10s; And/or described 6th duration is 300-500ms.
Preferably, described 4th duration equals described 5th duration.
Preferably, described equipment is motor vehicles or ATM (automatic teller machine).
According to a second aspect of the invention, provide a kind of for detecting the method needing the equipment of protection whether to be invaded and harassed, described equipment is provided with invasion pick-up unit, and described invasion pick-up unit comprises:
For sensing by the sensor invading and harassing the vibration signal caused; And
Microprocessor, it is suitable for vibration signal described in analyzing and processing;
Wherein, described analyzing and processing at least comprises:
-variable and predetermined first threshold that reflect the intensity of vibration signal are in real time compared, when described variable is equal to or greater than first threshold, invades and harasses pick-up unit and export relevant information; With
-Second Threshold low with predetermined ratio first threshold for described variable is compared, if on the first duration of timing when not reaching first threshold reaching Second Threshold from described variable described variable exceed Second Threshold at least one times and followed by described variable on the second duration of the first duration all the time lower than Second Threshold, then counter adds 1, when the value of counter reaches the 3rd predetermined threshold value, invade and harass pick-up unit and export relevant information, when the value of counter remains unchanged in the 3rd predetermined duration, then counter resets; And/or
-the 4th low with predetermined ratio Second Threshold for described variable threshold value is compared, if described variable is all the time higher than the 4th threshold value on the 4th duration of timing when not reaching Second Threshold reaching the 4th threshold value from described variable, then proceed analyzing and processing, until described variable on the 5th duration all the time lower than the 4th threshold value, and calculate from the 4th duration finish time to the invasion duration of the 5th duration finish time, if invade and harass duration equal or be longer than the 6th predetermined duration, invade and harass pick-up unit and export relevant information.
Invasion pick-up unit of the present invention and invasion detection method reliably can be distinguished noise and actual invasion, reduce and judge by accident and fail to judge.
Accompanying drawing explanation
Below, by describing the present invention in more detail referring to accompanying drawing, the principle that the present invention may be better understood, feature and advantage.Accompanying drawing comprises:
Fig. 1 schematically shows the invasion pick-up unit according to one exemplary embodiment of the present invention;
Fig. 2 shows an example of the vibration signal when high strength such as large hammering/explosion type are invaded and harassed and corresponding detection method;
Fig. 3 shows an example of vibration signal when medium tenacity is invaded and harassed and corresponding according to detection method of the present invention;
Fig. 4 shows an example of vibration signal when lasting low-intensity is invaded and harassed; And
Fig. 5 show lasting low-intensity invade and harass according to detection method of the present invention.
Embodiment
, in more detail specific embodiments of the invention will be described referring to accompanying drawing below, to understand basic thought of the present invention better.
Fig. 1 schematically shows the invasion pick-up unit 1 according to one exemplary embodiment of the present invention.As shown in Figure 1, invade and harass pick-up unit 1 at least to comprise: for the sensor 2 of sense vibrations signal; The microprocessor 3 be connected with sensor 2, described microprocessor 3 receives vibration signal from sensor 2, and carries out analyzing and processing to vibration signal; Output unit 4, described microprocessor 3 exports relevant information according to analysis processing result by output unit 4, such as, the duty etc. of warning information, invasion pick-up unit 1; And the power supply 5 powering at least to microprocessor 3.
In some cases, the microprocessor 3 of being powered by power supply 5 can be powered to sensor 2, output unit 4, or also directly can be powered to sensor 2, output unit 4 by power supply 5 in some cases at other.
According to a preferred illustrative embodiment of the present invention, sensor 2 is acceleration transducers, and sample frequency is preferably 2kHz.
According to a preferred illustrative embodiment of the present invention, invade and harass pick-up unit 1 and also can comprise adjustment setting device 6, this adjustment setting device 6 can regulate (below, will be explained in more detail this) some parameters of invading and harassing in pick-up unit 1 as required.
According to a preferred illustrative embodiment of the present invention, microprocessor 3 is connected with the output terminal 8 of sensor 2 by its serial peripheral interface (SPI) 7, and obtains vibration signal by this serial peripheral interface 7 from sensor 2.
According to a preferred illustrative embodiment of the present invention, power supply 5 is that 9 ~ 12VDC inputs 3VDC output direct supply.
According to a preferred illustrative embodiment of the present invention, output unit 4 comprises LED indicating member and/or warning horn.LED indicating member can indicate the duty of invading and harassing pick-up unit 1, such as, represents warning when LED indicating member glows, and represents that invading and harassing pick-up unit 1 carries out testing during green light.Warning horn can be audible alarm.
According to a preferred illustrative embodiment of the present invention, also can be invasion pick-up unit 1 and be equipped with detaching-proof protection switch, invasion pick-up unit 1 can be made at invasion pick-up unit 1 to send corresponding alarm by when malice touching, dismounting.
Below, by description invasion pick-up unit 1 of the present invention be how specific works.Invasion pick-up unit 1 of the present invention preferably has the detection method for three kinds of dissimilar invasions of the following stated.
1. large hammering/explosion type high strength is invaded and harassed
The feature of this invasion is that impact strength is large, and the duration is usually relatively short.Fig. 2 shows an example of the vibration signal of this invasion, and wherein, horizontal ordinate is time t, and ordinate is vibration signal amplitude y.
For such invasion, preset first threshold H1.When the amplitude of the vibration signal that sensor 2 senses meets or exceeds first threshold H1, microprocessor 3 produces corresponding output by output unit 4 immediately, such as, LED light is glowed, and warning horn produces alarm sound.
As shown in Figure 2, because first threshold H1 is just, therefore, if directly compared with first threshold H1 by vibration signal, then in fact real what participate in comparing is the positive part of vibration signal.In order to improve the reliability of judgement, preferably the absolute value of vibration signal and first threshold H1 being compared, as long as absolute value exceedes first threshold H1, namely thinking that signal level has exceeded first threshold H1.
Preferably, first threshold H1 is made to regulate according to the difference of application scenario as the case may be, such as.More preferably, first threshold H1 can be selected from multiple predetermined value, such as, can from 2,4,8,16g(g=9.8m/s
2) middle selection.It will be obvious to those skilled in the art that, first threshold is different, invades and harasses the sensitivity also corresponding difference of pick-up unit 1.
First threshold H1 is preferably by regulating setting device 6 to regulate.
2. medium tenacity is invaded and harassed
As mentioned above, large hammering/explosion type high strength is invaded and harassed, exceed first threshold H1 once vibration signal (preferably its absolute value) and just produce alarm immediately.But, medium tenacity is invaded and harassed, if still adopt the first threshold H1 that hammering/explosion type high strength is invaded and harassed, then cannot detect this invasion because the amplitude of vibration signal does not reach first threshold H1.Therefore, medium tenacity is invaded and harassed, adopts the Second Threshold H2 lower than first threshold H1, such as H2=1g.
As shown in Figure 3, medium tenacity is invaded and harassed, when the amplitude (preferably its absolute value) of the vibration signal that sensor 2 senses reaches Second Threshold H2 and do not reach first threshold H1, microprocessor 3 starts this detection method, and starts timing preferably by its internal timer.First duration T1 with this timer time for starting point, and afterwards followed by the second duration T2.The amplitude (preferably its absolute value) of the vibration signal on first, second duration T1, T2 is compared with Second Threshold H2 respectively.If the amplitude of the vibration signal gathered on the first duration T1 (preferably its absolute value) exceedes Second Threshold H2 at least one times, and the amplitude (preferably its absolute value) of the vibration signal gathered on the second duration T2 is all the time lower than Second Threshold H2, then think that corresponding equipment may be subject to medium tenacity and invade and harass.In order to improve the reliability of judgement, microprocessor 3 is not now given the alarm by output unit 4 at once, but makes counter (being preferably the counter in microprocessor 3) add 1, then the value of counter is compared with the 3rd predetermined threshold value H3.If the value adding the counter after 1 is still less than the 3rd threshold value H3, then invade and harass pick-up unit 1 and do not give the alarm, if reach the 3rd threshold value H3, then produce corresponding output by output unit 4, such as, LED light is glowed, warning horn produces alarm sound.
If counter is not cumulative in predetermined the 3rd duration (such as 10 seconds), does not namely detect new possible medium tenacity and invade and harass, then now counter reset, that is, make counter clear, ready for detecting next time.
Preferably, one or more in Second Threshold H2, the first duration T1, the second duration T2, the 3rd threshold value H3 and the 3rd duration also can regulate according to the difference of application scenario as the case may be, such as, and regulate preferably by adjustment setting device 6.
3. continue low-intensity and invade and harass (invasion of such as electric drill and electric saw)
When the low-intensity that corresponding equipment is subject to continuing relatively long-time (such as several seconds) is invaded and harassed, may all cannot be detected by above-mentioned two kinds of detection methods.The vibration signal that this lasting low-intensity is invaded and harassed is except the duration is relatively long, and the amplitude of vibration signal is relatively little (usually maximum be also only 2g) also, and the signal intensity between two sampled points is in succession also relatively little.Fig. 4 shows an example of this invasion.
According to the present invention, as shown in Figure 5, for this invasion, preset the four threshold value H4(lower than Second Threshold H2 such as, H4=0.5g, 0.6g etc.).When the amplitude (preferably its absolute value) of vibration signal reaches the 4th threshold value H4 and does not reach Second Threshold H2 (the t1 moment corresponding in Fig. 5), microprocessor 3 starts this detection method, and start timing preferably by the internal timer of microprocessor 3, then judge immediately following corresponding N1 the sampled point of the 4th duration T4(after t1) on the amplitude (preferably its absolute value) of vibration signal whether be still all positioned on the 4th threshold value H4, if not, terminate this time to detect, if, proceed to detect, until the amplitude of vibration signal (preferably its absolute value) moment t2 drop to the 4th threshold value H4 and immediately following corresponding N2 the sampled point of the 5th duration T5(after moment t2) go up all lower than the 4th threshold value H4 (the t3 moment corresponding in Fig. 5).Now, microprocessor 3 calculates the invasion duration T between t1+T4 to t3, and this invasion duration T and the 6th predetermined duration (such as 300-500ms) are compared, if invade and harass duration T to be less than the 6th duration, then not think that there is lasting low-intensity invades and harasses, if invade and harass duration T to be more than or equal to the 6th duration, then think to exist and continue low-intensity invasion, then produce corresponding output by output unit 4, such as, LED light is glowed, and warning horn produces alarm sound.
Preferably, one or more in the 4th threshold value H4, the 4th duration T4, the 5th duration T5 and the 6th duration also can regulate according to the difference of application scenario as the case may be, such as, and regulate preferably by adjustment setting device 6.In addition, the 4th duration T4(sampling number N1) preferably equal the 5th duration T5(sampling number N2).
For a person skilled in the art, other advantages of the present invention and substituting embodiment are apparent.Therefore, the present invention is not limited to shown and described detail, representative configurations and exemplary embodiment with regard to its more wide in range meaning.On the contrary, those skilled in the art can carry out various amendment and substitute when not departing from essence spirit of the present invention and scope.
Claims (10)
1., for detecting the invasion pick-up unit needing the equipment of protection whether to be invaded and harassed, comprising:
For sensing by the sensor invading and harassing the vibration signal caused; And
Microprocessor, it is suitable for vibration signal described in analyzing and processing;
Wherein, described analyzing and processing at least comprises:
-variable and predetermined first threshold that reflect the intensity of vibration signal are in real time compared, when described variable is equal to or greater than first threshold, invades and harasses pick-up unit and export relevant information; With
-Second Threshold low with predetermined ratio first threshold for described variable is compared, if on the first duration of timing when not reaching first threshold reaching Second Threshold from described variable described variable exceed Second Threshold at least one times and followed by described variable on the second duration of the first duration all the time lower than Second Threshold, then counter adds 1, when the value of counter reaches the 3rd predetermined threshold value, invade and harass pick-up unit and export relevant information, when the value of counter remains unchanged in the 3rd predetermined duration, then counter resets; And/or
-the 4th low with predetermined ratio Second Threshold for described variable threshold value is compared, if described variable is all the time higher than the 4th threshold value on the 4th duration of timing when not reaching Second Threshold reaching the 4th threshold value from described variable, then proceed analyzing and processing, until described variable on the 5th duration all the time lower than the 4th threshold value, and calculate from the 4th duration finish time to the invasion duration of the 5th duration finish time, if invade and harass duration equal or be longer than the 6th predetermined duration, invade and harass pick-up unit and export relevant information.
2. invade and harass pick-up unit as claimed in claim 1, it is characterized in that,
Described variable is the absolute value of the amplitude of vibration signal.
3. invade and harass pick-up unit as claimed in claim 1 or 2, it is characterized in that,
Described microprocessor obtains vibration signal by its serial peripheral interface from sensor; And/or
Described invasion pick-up unit also comprises the output unit for exporting described relevant information.
4. invade and harass pick-up unit as claimed in claim 3, it is characterized in that,
Described invasion pick-up unit also comprises detaching-proof protection switch, and described detaching-proof protection switch is suitable for preventing described invasion pick-up unit itself to be damaged; And/or
Described output unit comprises LED indicating member and/or warning horn, and described LED indicating member is suitable for indicating the duty of invading and harassing pick-up unit, and described warning horn is suitable for giving the alarm when invading and harassing pick-up unit and invasion being detected.
5., as the invasion pick-up unit as described in arbitrary in foregoing Claims, it is characterized in that,
Described sensor is acceleration transducer, and sample frequency is 2kHz; And/or
Described invasion pick-up unit also comprises the one or more adjustment setting device being suitable for setting and regulating in first threshold, Second Threshold, the 3rd threshold value, the 4th threshold value, the first duration, the second duration, the 3rd duration, the 4th duration, the 5th duration and the 6th duration.
6. invade and harass pick-up unit as claimed in claim 5, it is characterized in that,
Described first threshold can be selected from multiple predetermined value by described adjustment setting device.
7., as the invasion pick-up unit as described in arbitrary in foregoing Claims, it is characterized in that,
Described 3rd duration is 10s; And/or
Described 6th duration is 300-500ms.
8., as the invasion pick-up unit as described in arbitrary in foregoing Claims, it is characterized in that,
Described 4th duration equals described 5th duration.
9., as the invasion pick-up unit as described in arbitrary in foregoing Claims, it is characterized in that,
Described equipment is motor vehicles or ATM (automatic teller machine).
10., for detecting the method needing the equipment of protection whether to be invaded and harassed, described equipment is provided with invasion pick-up unit, and described invasion pick-up unit comprises:
For sensing by the sensor invading and harassing the vibration signal caused; And
Microprocessor, it is suitable for vibration signal described in analyzing and processing;
Wherein, described analyzing and processing at least comprises:
-variable and predetermined first threshold that reflect the intensity of vibration signal are in real time compared, when described variable is equal to or greater than first threshold, invades and harasses pick-up unit and export relevant information; With
-Second Threshold low with predetermined ratio first threshold for described variable is compared, if on the first duration of timing when not reaching first threshold reaching Second Threshold from described variable described variable exceed Second Threshold at least one times and followed by described variable on the second duration of the first duration all the time lower than Second Threshold, then counter adds 1, when the value of counter reaches the 3rd predetermined threshold value, invade and harass pick-up unit and export relevant information, when the value of counter remains unchanged in the 3rd predetermined duration, then counter resets; And/or
-the 4th low with predetermined ratio Second Threshold for described variable threshold value is compared, if described variable is all the time higher than the 4th threshold value on the 4th duration of timing when not reaching Second Threshold reaching the 4th threshold value from described variable, then proceed analyzing and processing, until described variable on the 5th duration all the time lower than the 4th threshold value, and calculate from the 4th duration finish time to the invasion duration of the 5th duration finish time, if invade and harass duration equal or be longer than the 6th predetermined duration, invade and harass pick-up unit and export relevant information.
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| CN201310407576.5A CN104424736B (en) | 2013-09-09 | 2013-09-09 | Invade and harass detection device and corresponding invasion detection method |
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| CN106375440A (en) * | 2016-08-31 | 2017-02-01 | 成都秦川科技发展有限公司 | Object platform and internet of things system |
| CN107067608A (en) * | 2017-05-19 | 2017-08-18 | 中国电子科技集团公司第四十研究所 | A kind of effective vibrational waveform intercept method based on three-level threshold determination |
| CN110415471A (en) * | 2019-07-03 | 2019-11-05 | 浙江大学 | A kind of underground historical relic anti-theft monitoring terminal and method based on 6LowPan |
| CN111402571A (en) * | 2019-01-02 | 2020-07-10 | 青岛海信网络科技股份有限公司 | Service fleet conflict abnormity early warning and adjustment scheme generation method and device |
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| CN106375440A (en) * | 2016-08-31 | 2017-02-01 | 成都秦川科技发展有限公司 | Object platform and internet of things system |
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| CN111402571A (en) * | 2019-01-02 | 2020-07-10 | 青岛海信网络科技股份有限公司 | Service fleet conflict abnormity early warning and adjustment scheme generation method and device |
| CN110415471A (en) * | 2019-07-03 | 2019-11-05 | 浙江大学 | A kind of underground historical relic anti-theft monitoring terminal and method based on 6LowPan |
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| CN104424736B (en) | 2018-05-22 |
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