CN1358663A - Three-dimension safety check system allowable pulse and fuorescence for slide door of elevator - Google Patents
Three-dimension safety check system allowable pulse and fuorescence for slide door of elevator Download PDFInfo
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- CN1358663A CN1358663A CN 00135250 CN00135250A CN1358663A CN 1358663 A CN1358663 A CN 1358663A CN 00135250 CN00135250 CN 00135250 CN 00135250 A CN00135250 A CN 00135250A CN 1358663 A CN1358663 A CN 1358663A
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Abstract
The present invention relates to a three-D safety detection system for detecting the object positioned in three-D place adjacent to the gateways, such as lifter gateway, etc, and its related method. Said method includes: an energy transmitter for transmitting three-D energy signal to described place; an energy receiver for receiving energy signal replected by the above-mentioned object and sampling said signal in preset frequency. In an implement example if the sampling signal with lowest value is reached to preset threshold value, a detected object signal can be formed, and in another example is the sampling signal is in present change range, a detected object signal can be formed.
Description
The present invention relates to elevator, specifically, the present invention relates to be used for the electronic security(ELSEC) checking system of cage door.
In the elevator facility, many automatic sliding doors all are equipped with safety system, and this system is designed to detect the potential interference of the shutoff operation of opposite house.This safety system generally comprises: a plurality of signal projectors source, and they are arranged on the door; And, a plurality of signal receivers source, they are arranged on another door.Signal projector is launched the signal heavy curtain of crossing over the cage door threshold, and these signals are received by signal receiver.When having covered the signal heavy curtain, safety system and door controller communicate, so that stop the shutoff operation of door and make opening or door being remained on the open position, this depends on the position that door is current.
Disclose a kind of gateway safety system in the US patent No. 4029176 (Mills), this system has used pinger and receptor, to detect near the object or person near the zone the cage door.Described system detects between door and the object of threshold crossing and detection zone extended to access road.Projector sends the inlet port passage by certain angle with signal.When having obstacle to enter in the detection zone, signal just reflects and is received device from obstacle and detects.
The another kind of gateway safety system that US patent No. 5886307 (people such as Full) illustrates discloses a kind of three dimension system that is used to the object that detects threshold crossing and be positioned at access road.This system is at threshold upslide outgoing beam heavy curtain and use the three-dimensional zone of detecting light beam irradiates access road dead ahead.If obstacle has covered one or more light beams, then described system will detect between the door and the obstacle of threshold crossing.In addition, if the object that leaves in the access road from the energy of three-dimensional light beam reflects into three-dimensional receptor, also can detect obstacle.
The above-mentioned system that is used for three-dimensional detection has open defect.For example, when the curtain type checking system need " interruption " has the obstacle of threshold crossing with indication in one or more heavy curtain light beams, three-dimensional checking system need carry out " connection ", with indication obstacle is arranged.The three-dimensional this contrary logic that detects can cause the sensivity to extra power, and this extra power is not accidental in monoplane or curtain type checking system.
Light is subject to interference from multiple extra power as the system of the three-dimensional energy that detects.For example, the exterior optical sensor that is positioned near the detected system of light source meeting of elevator facility of checking system by mistake picks up.If modulate light from external source in the similar mode of the light of being launched with door safety system, then this light can be picked and be interpreted as expression obstacle is arranged.This external light source comprises fluorescence radiation system, urgent strobelight, emergency vehicle signal lamp.
The pulsed external source is that electrical noise also can cause the obstacle signal that is not intended in the three dimensional door safety system.Such electrical noise source comprises relay system elevator controller and electromechanical formula door operators.
An object of the present invention is to provide a kind of improved type three dimensional door safety detecting system that is used for sliding door.
Another object of the present invention provides a kind of three dimensional door safety detecting system, and this system can operation reliably under the situation that the pulsed electrical noise is arranged.
Also purpose of the present invention provides a kind of three dimensional door safety detecting system, can there be operation reliably under the situation of external light source in this system, described external light source comprises such light source, and it can produce the luminous energy with the similar feature of the luminous energy that forms with checking system.
Invention as herein described can achieve the above object and other purpose.
The present invention relates to a kind of three dimensional door safety system, it be used to detect near or be positioned at the object or person of predetermined safety zone of the door of unlatching.A plurality of receptors or detector are positioned on the door, and a plurality of projectors are positioned on the relative door.The obstacle in the zone, dead ahead of the door that scanning is closed.Described safety system detects the object in the access road, distinguishes the external energy that is not by this safety system generation simultaneously.In general, each energy beam that energy emitter is produced is taken a sample.Preserve the amplitude of each corresponding energy beam.With these amplitudes each all with the preset detection threshold, to determine whether there is object in the detection zone.
The first embodiment of the present invention has been considered the temporary of interfering energy, wherein, disturbs to have the very short time, just can not be detected then.In this embodiment, each scanning frame all to each three-dimensional energy beam sampler repeatedly.The minimum amplitude sample value that collects is compared with detection threshold, whether have object in the three-dimensional detection zone so that determine.Most of pulseds that the foregoing description can be ignored the light that is produced such as electrical noise spike and stroboscopic lamp are effectively disturbed.
The second embodiment of the present invention has also been considered the temporary of interfering energy.But, in this case, outside the high amplitude part of interfering signal, still can continue to detect interfering energy.In this embodiment, each scanning frame all to each three-dimensional energy beam sampler repeatedly.Just corresponding energy beam is preserved each sample value.The detected energy of reflection object in three-dimensional detection zone is answered constant, that is to say with regard to the amplitude from the sample to the sample in any particular energy Shu Eryan single sweep operation frame in predetermined maximum changing range.If the sample of any particular energy bundle does not have this constant characteristic, the energy of this energy beam can be regarded then as interfering energy is also ignored.Described embodiment by can ignore the light that produces such as some fluorescence radiation systems be consecutively detected but the inconsistent interfering energy of amplitude has improved the examination ability of first embodiment.
The third embodiment of the present invention with an identification distribution to the energy that is sent, so that can refuse to be consecutively detected and the interfering energy of amplitude unanimity.In this embodiment, each scanning frame to each three-dimensional energy beam sampler once, simultaneously with unique verifiable modulation can be detected the modulation code confirmed of receptor generate the energy of emission.If in the energy beam of sampling, detect modulation code, then generate the signal that expression has object.If receptor is not verified the modulation code of the detected energy that receives with regard to the particular energy bundle, then ignore the detected energy that is used for described energy beam as interfering energy, do not consider its amplitude.Detecting serially and the permanent relatively interfering energy that can not be refused by aforementioned first and second embodiment of amplitude because of interfering energy the light that described embodiment can refuse to produce such as some fluorescence radiation systems.
An alternative embodiment of the invention can be used the multiple combination with regard to above-mentioned three described methods of most preferred embodiment.By several different methods is combined, can distinguish the target detect energy with from the interfering energy of extra power.
Owing to because of three-dimensional detectability being increased external light source and impulsive noise are had sensivity, under multiple condition so the system of some prior art can not operate to what door safety system caused.Described condition comprises lifter facility, the fire alarm system of using stroboscopic lamp of using the relay controller, be positioned near the facility the emergency vehicle signal (for example hospital) and be positioned near the fluorescence radiation system facility.Thereby the invention provides a kind of can be in this type systematic reliable operation can be safer and operated system economically.
Fig. 1 is the summary partial elevation view of system of the present invention;
Fig. 2 is the local figure of summary of the assembly of Fig. 1 system;
Fig. 3 is the summary partial plan layout of Fig. 1 system;
Fig. 4 is the summary partial plan layout of Fig. 1 system;
Fig. 5 is the skeleton diagram of binary modulated sign indicating number of the present invention.
Fig. 1 shows the system of the most preferred embodiment of door safety system of the present invention (10), and it is used for the gateway (12) of the opening and closing elevator car (16) adjacent with wall (18,20) with corridor (14).Show one group of corridor door (24,26) and one group of elevator car door (28,30).These two groups of doors (24,26,28,30) can slip off and be closed together on threshold (34), and corridor door (24,26) is closed and opened afterwards and afterwards at elevator car door (28,30) slightly respectively.Safety detecting system (38) is installed on the elevator car door (28,30) adjacent with corridor door (24,26).Safety detecting system (38) comprises projector group (40) and detector set (42), every group of opposition side that all is arranged on gateway (12) and toward each other.
As shown in Figure 2, each projector group (40) includes an outer cover (46) and a transparent cover cap (48), and they are used to protect transmitter circuit board (50) and transmitter lens plate (52).Transmitter lens plate (52) comprises a plurality of three dimensional emission device lens (56) and a plurality of heavy curtain transmitter lens (58).Transmitter circuit board (50) comprises a plurality of projectors or light-emitting diode (LED) (60), and they are arranged on and each lens (56,58) position adjacent place, so that the emission infrared light.Projector baffle plate (64) is supporting outer cover (46) and is partly sheltering from the light that is used for three dimensional emission device lens (56).
Detector set (42) is configured to the mirror image of projector group (40).Detector set (42) comprises a detector set outer cover (66), and it has transparent detector set cover cap (68), so that protection detector circuit plate (70) and detector lens plate (72).Detector lens plate (72) comprises a plurality of three-centered detector lens (76) and a plurality of heavy curtain detector lens (78).Heavy curtain detector lens (78) is arranged on the right opposite of heavy curtain transmitter lens (56).Detector circuit plate (70) comprises a plurality of detectors or photodiode, and they are positioned at and each lens (76,78) position adjacent place, so that detect the light that is reflected.Detector baffle plate (84) is supporting detector outer cover (66) and is partly sheltering from the light that is used for three-centered detector lens (76).
Safety system (38) comprises a controller (77), and it provides and control energy to assembly (40,42), communicates to the signal ordering of giving assembly (40,42) and control and with door controller (79).
Controller (77) includes data acquisition and data processing circuit, and this circuit comprises power supply, analog-digital converter and microprocessor.Microprocessor for example also comprises programmable memory from 68H C11 type or the commercially available microprocessor of other this class of Motorola, and it is used to limit executable program, so that detect may disturb cage door.
In operation, if detected object or person threshold crossing (34) or near gateway (12), then safety system (38) will stop lifter car door (28,30) to be closed.Heavy curtain transmitter lens (58) is transmitted to heavy curtain detector lens (78) with the signal of threshold crossing (34).If covered the heavy curtain signal when opening or closing at door (28,30), then safety system (38) just communicates with door controller (79), so that keep the unlatching of door (28,30) respectively or reverse shutoff operation.
Three dimensional emission device lens (56) outwards are emitted to corridor (14) by predetermined angular with three dimensional signal, as shown in Figure 3 and Figure 4.Detector (80) and three-centered detector lens (76) receive emission from three dimensional emission device lens (56) and by the signal of reflected at predetermined angles from object.Crossed area definition detection zone (94) between the visual field (86) of three dimensional emission device lens (56) and the visual field (96) of three-centered detector lens (76).When object or person enter detection zone (94), can meet this obstacle and be reflected into three-centered detector lens (76) from the signal of three dimensional emission device lens (56).When receiving signal, safety system (38) is handled to the received signal at three-centered detector lens (76), whether represents to have detected obstacle to judge this signal.If like this, safety system (38) communicates with door controller (79), so that reverse shutoff operation or keep door (28,30) to open.
In operating process, the unlatching of safety system (38) frame by frame continuous scanning door also responds any detected obstacle.Each scanning frame includes two stages: data acquisition phase and data handing stage.
With regard to the following description, term " energy beam " be meant emission from heavy curtain transmitter lens (58) or emission from the signal of three dimensional emission device lens (56).
In data acquisition phase, each heavy curtain and three-dimensional energy bundle are all taken a sample, and final energy beam data storage is got up.As specific embodiment of the present invention is desired, only once to the sampling of each scanning frame of heavy curtain energy beam, to the three-dimensional energy bundle then each more than the frame sample once.Finishing any particular energy Shu Buguan in the maximum period of time of 750 μ Sec is heavy curtain energy beam or the sampling of the single of three-dimensional energy bundle.
In the data handing stage, the energy beam data that the data acquisition phase is accumulated are handled, to judge whether to have detected already obstacle.Signal is sent to door controller (79), existing or not existing with indication door obstacle.
By following mode each energy beam is taken a sample.At first, start the projector that is used for energy beam.The energy signal of being launched is modulated, so that make testing circuit can refuse light (as sunlight or make clear one's meaning and position and know the light of lamp) from extra power.Employed modulation type depends on specific embodiment of the present invention.After having started the projector that is used for energy beam, the receptor that is used in energy beam can receive the signal of being launched.Handle any detected signal with multiple circuit (gain selection, filtering and whole ripple).Final signal is sent to an integrator.The output of this integrator starts from reference voltage and tilts along negative direction.Then, the integrator output signal is sent to a voltage comparator, in this comparator, described signal is compared with the mounting hardware threshold voltage.When integrator output dropped under the hardware threshold voltage, comparator just formed one " integration end " signal.Beginning to " integration end " signal from integration is the direct representative of the intensity of received energy beam signal during this period of time.Represent stronger detected energy bundle signal short integration time.With regard to the energy beam of taking a sample, (or intensity) value of above-mentioned time is stored.If can not in the maximum sample time of 750 μ Sec, form the integration end signal, then can determine " not detecting " state for the energy beam of taking a sample.
The data handing stage consists essentially of energy beam strength rating and the preset detection threshold value of comparison in the data acquisition phase accumulation.If the detected signal that is used for any three-dimensional energy bundle surpasses described threshold value, then a signal is sent to door controller (79), detected obstacle with indication.
In the first embodiment of the present invention, by fixing frequency the energy beam signal of emission is modulated with continuous square wave stream, and, in each scanning frame all repeatedly to each three-dimensional energy beam sampler.Concerning any one particular energy bundle, only actual storage is used to include the value of the sample of least energy beam intensity value.Carry out normal data handing as described above.Data acquisition phase at scanning frame can fully be carried out the interference rejection that the foregoing description provided basically, thereby makes this embodiment become the simplest and the fastest embodiment among described three embodiment of presents.
In second embodiment of the present invention, the same among first embodiment that coexists, by fixing frequency the energy beam signal of emission is modulated with continuous square wave stream, and, in each scanning frame all repeatedly to each three-dimensional energy beam sampler.Different with first embodiment is that for each corresponding energy beam, the energy beam strength rating that will be used for each sample store.In the data handing stage, by relatively confirming to be used for the energy beam intensity of this energy beam from the strength rating that are used for each energy beam of each sample.The value representation actv. energy beam signal that is roughly in the promptly predetermined maximum changing range of constant energy speed strength rating receives, and the notable difference between the sample then represents to have interfering energy.If the sample indication that obtains with regard to the particular energy bundle has interfering energy to exist, then can ignore the signal that receives with regard to this particular energy bundle.But if the sample indication actv. energy beam signal of obtaining with regard to the particular energy bundle receives, and least energy beam intensity value then represents to have detected obstacle greater than detection threshold.By similar mode the data that are used for each three-dimensional energy bundle are handled.
In the 3rd embodiment of the present invention, by fixing bit rate the energy beam signal of emission and specific repetition binary code are modulated, rather than carried out simple square-wave frequency modulation.With reference to Fig. 5, as with the comparison of continuous square-wave frequency modulation, the exemplary embodiment of binary modulated sign indicating number has been described.Each scanning frame only to the three-dimensional energy beam sampler once.In data acquisition phase, when the intensity of any one energy beam is taken a sample, verify the binary modulated sign indicating number of the signal that receives by monitor the polarity of the signal that receives with the port plug of CPU (central process unit).If checking does not have the binary modulated sign indicating number, then can determine detected signal from the exterior energy of system, and will be used for " not detecting " level storage of this energy beam.If light beam includes suitable modulation code, then as described above, will represent that with regard to energy beam the value of this energy beam intensity stores.Normally carry out the operation in data handing stage as described above.Although a kind of binary modulated sign indicating number has been described in this manual, concerning the expert of present technique, clearly, also can use other modulation code, for example use the frequency modulation sign indicating number.
Owing to because of three-dimensional detectability being increased external light source and impulsive noise are had sensivity, under multiple condition so some system can not operate to what door safety system caused.Described condition comprises lifter facility, the fire alarm system of using stroboscopic lamp of using the relay controller, be positioned near the facility the emergency vehicle signal lamp (for example hospital) and be positioned near the fluorescence radiation system facility.Thereby the invention provides a kind of can be in this class environment reliable operation can be safer and operated system economically.
Although most preferred embodiment of the present invention has been described,, should be realized that, under the situation of the scope that does not break away from current claimed invention, can improve and change.
Claims (21)
1, the many methods that three-dimensional energy projector and receptor detected the object that is positioned at detection zone of a kind of usefulness, wherein, described projector is emitted to above-mentioned object by predetermined angle with energy beam, and the receptor sensing is from the energy beam of above-mentioned object reflection, and described method comprises:
The energy beam that the reflected sampling predetermined times right to the transmitter receipt device, so that one group of strength signal is provided, the intensity of this group energy that signal indication reflected;
The strength signal of the minimum in above-mentioned one group of strength signal is compared with predetermined threshold value; And
When the strength signal of described minimum has reached above-mentioned predetermined threshold value, generate one and detect object signal.
2, method as claimed in claim 1, this method also comprises:
Determine the variation range of above-mentioned one group of strength signal;
The variation range of above-mentioned one group of strength signal is compared with predetermined maximum changing range; And
When described variation range is in described predetermined maximum changing range, generates one and detect object signal.
3, method as claimed in claim 1, this method also comprises:
Modulate the right energy beam of being launched of described transmitter receipt device with predetermined modulation code;
Whether detection exists modulation code in the energy beam of sampling; And
When detecting described modulation code, generate one and detect object signal.
4, method as claimed in claim 2, this method also comprises:
Modulate the right energy beam of being launched of described transmitter receipt device with predetermined modulation code;
Whether detection exists modulation code in the energy beam of sampling; And
When detecting described modulation code, generate one and detect object signal.
5, method as claimed in claim 1, said sampling also comprises:
The energy beam that is reflected is taken a sample, so that a composite signal to be provided;
To one section preset time of this composite signal integration, so that an integrator output signal is provided;
With above-mentioned integrator signal and predetermined minimum detectable threshold; And
When having reached the minimum detectable threshold value, generate an integration end signal.
6, method as claimed in claim 1, wherein this method also comprises:
Provide many to heavy curtain energy emitter and receptor, wherein, projector directly is emitted to each corresponding receptor with the energy beam heavy curtain;
Energy beam to the right direct emission of heavy curtain transmitter receipt device is taken a sample, and so that a heavy curtain signal to be provided, this signal indication does not have object in described heavy curtain; And
When covering described heavy curtain signal, generate one second and detect object signal.
7, method as claimed in claim 1, wherein said transmitter receipt device is right to also comprising by many transmitter receipt devices that energy emitter and receptor are constituted.
8, method as claimed in claim 1 is on wherein said many relative doors that three-dimensional energy projector and receptor are installed in elevator car.
9, method as claimed in claim 3, wherein said modulation code comprises binary code.
10, the many methods that three-dimensional energy projector and receptor detected the object that is positioned at detection zone of a kind of usefulness, wherein, described projector is emitted to above-mentioned object by predetermined angle with energy beam, and the reflection of receptor sensing is from the energy beam of above-mentioned object, and described method comprises:
The energy beam that the reflected sampling predetermined times right to the transmitter receipt device, so that one group of strength signal is provided, the intensity of this group energy that signal indication reflected;
Determine the variation range of above-mentioned one group of strength signal;
The variation range of above-mentioned one group of strength signal is compared with predetermined maximum changing range; And
When described variation range is in described predetermined maximum changing range, generates one and detect object signal.
As the method for claim 10, it is characterized in that 11, this method also comprises:
Modulate the right energy beam of being launched of described transmitter receipt device with predetermined modulation code;
Whether detection exists modulation code in the energy beam of sampling; And
When detecting described modulation code, generate one and detect object signal.
12, the many methods that three-dimensional energy projector and receptor detected the object that is positioned at detection zone of a kind of usefulness, wherein, described projector is emitted to above-mentioned object by predetermined angle with energy beam, and the receptor sensing is from the energy beam of above-mentioned object reflection, and described method comprises:
Modulate the right energy beam of being launched of described transmitter receipt device with predetermined modulation code;
Whether detection exists modulation code in the energy beam of the sampling of transmitter receipt device; And
When detecting described modulation code, generate one and detect object signal.
13, a kind of system that is used to detect the object that is positioned at detection zone, this system comprises:
Many to three-dimensional energy projector and receptor, wherein, described projector is emitted to above-mentioned object by predetermined angle with energy beam, and the receptor sensing is from the energy beam of above-mentioned object reflection;
The a pair of controller that responds from the signal of above-mentioned receptor, this controller has data acquisition and data processing circuit, and this circuit is used for:
The energy beam that the reflected sampling predetermined times right to the transmitter receipt device, so that one group of strength signal is provided, the intensity of this group energy that signal indication reflected;
The strength signal of the minimum in above-mentioned one group of strength signal is compared with predetermined threshold value; And
When the strength signal of described minimum has reached above-mentioned predetermined threshold value, generate one and detect object signal.
14, as the system of claim 13, wherein said data acquisition and data processing circuit also comprise such circuit, and it is used for:
Determine the variation range of above-mentioned one group of strength signal;
The variation range of above-mentioned one group of strength signal is compared with predetermined maximum changing range; And
When described variation range is in described predetermined maximum changing range, generates one and detect object signal.
15, as the system of claim 13, wherein said data acquisition and data processing circuit also comprise such circuit, and it is used for:
Modulate the right energy beam of being launched of described transmitter receipt device with predetermined modulation code;
Whether detection exists modulation code in the energy beam of sampling; And
When detecting described modulation code, generate one and detect object signal.
As the system of claim 14, it is characterized in that 16, described data acquisition and data processing circuit also comprise such circuit, it is used for:
Modulate the right energy beam of being launched of described transmitter receipt device with predetermined modulation code;
Whether detection exists modulation code in the energy beam of sampling; And
When detecting described modulation code, generate one and detect object signal.
17, as the system of claim 13, on wherein said many relative doors that three-dimensional energy projector and receptor are installed in elevator car.
18, as the system of claim 13, wherein said data acquisition and data processing circuit also comprise microprocessor, it can respond from the signal of receptor and have memory device, this memory device is used for storage signal and comprises the signal that is used to limit executable program, and described executable program is used for generation and detects object signal.
19, a kind of system that is used to detect the object that is positioned at detection zone, this system comprises:
Many to three-dimensional energy projector and receptor, wherein, described projector is emitted to above-mentioned object by predetermined angle with energy beam, and the reflection of receptor sensing is from the energy beam of above-mentioned object;
The a pair of controller that responds from the signal of above-mentioned receptor, this controller has data acquisition and data processing circuit, and this circuit is used for:
The energy beam that the reflected sampling predetermined times right to the transmitter receipt device, so that one group of strength signal is provided, the intensity of this group energy that signal indication reflected;
Determine the variation range of above-mentioned one group of strength signal;
The variation range of above-mentioned one group of strength signal is compared with predetermined maximum changing range; And
When described variation range is in described predetermined maximum changing range, generates one and detect object signal.
20, as the system of claim 19, wherein said data acquisition and data processing circuit also comprise such circuit, and it is used for:
Modulate the right energy beam of being launched of described transmitter receipt device with predetermined modulation code;
Whether detection exists modulation code in the energy beam of sampling; And
When detecting described modulation code, generate one and detect object signal.
21, a kind of system that is used to detect the object that is positioned at detection zone, this system comprises:
Many to three-dimensional energy projector and receptor, wherein, described projector is emitted to above-mentioned object by predetermined angle with energy beam, and the reflection of receptor sensing is from the energy beam of above-mentioned object;
The a pair of controller that responds from the signal of above-mentioned receptor, this controller has data acquisition and data processing circuit, and this circuit is used for:
Modulate the right energy beam of being launched of described transmitter receipt device with predetermined modulation code;
Whether detection exists modulation code in the energy beam of sampling; And
When detecting described modulation code, generate one and detect object signal.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00135250 CN1212964C (en) | 2000-12-12 | 2000-12-12 | Three-dimension safety check system allowable pulse and fuorescence for slide door of elevator |
| CNB2004100114723A CN100491225C (en) | 2000-12-12 | 2000-12-12 | Method and system for detecting object positioned in detection area |
| HK06110344.6A HK1090012A1 (en) | 2000-12-12 | 2006-09-18 | System and method for detecting an object in a zone of detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00135250 CN1212964C (en) | 2000-12-12 | 2000-12-12 | Three-dimension safety check system allowable pulse and fuorescence for slide door of elevator |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100114723A Division CN100491225C (en) | 2000-12-12 | 2000-12-12 | Method and system for detecting object positioned in detection area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1358663A true CN1358663A (en) | 2002-07-17 |
| CN1212964C CN1212964C (en) | 2005-08-03 |
Family
ID=4596664
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100114723A Expired - Fee Related CN100491225C (en) | 2000-12-12 | 2000-12-12 | Method and system for detecting object positioned in detection area |
| CN 00135250 Expired - Fee Related CN1212964C (en) | 2000-12-12 | 2000-12-12 | Three-dimension safety check system allowable pulse and fuorescence for slide door of elevator |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100114723A Expired - Fee Related CN100491225C (en) | 2000-12-12 | 2000-12-12 | Method and system for detecting object positioned in detection area |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN100491225C (en) |
| HK (1) | HK1090012A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445322A (en) * | 2011-09-21 | 2012-05-09 | 广东省特种设备检测院 | Device for detecting comprehensive performance of light curtain and safety grating |
| US9163446B2 (en) | 2010-03-17 | 2015-10-20 | Yale Security Inc. | Door control apparatus |
| CN105035927A (en) * | 2014-05-02 | 2015-11-11 | 恩索塔有限公司 | A method of operating an automatic door installation |
| US11187022B1 (en) | 2001-07-13 | 2021-11-30 | Steven M. Hoffberg | Intelligent door restraint |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105947851B (en) * | 2016-06-15 | 2018-09-21 | 日立楼宇技术（广州）有限公司 | Block analyte detection, elevator door control method and system |
-
2000
- 2000-12-12 CN CNB2004100114723A patent/CN100491225C/en not_active Expired - Fee Related
- 2000-12-12 CN CN 00135250 patent/CN1212964C/en not_active Expired - Fee Related
-
2006
- 2006-09-18 HK HK06110344.6A patent/HK1090012A1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11187022B1 (en) | 2001-07-13 | 2021-11-30 | Steven M. Hoffberg | Intelligent door restraint |
| US9163446B2 (en) | 2010-03-17 | 2015-10-20 | Yale Security Inc. | Door control apparatus |
| CN102445322A (en) * | 2011-09-21 | 2012-05-09 | 广东省特种设备检测院 | Device for detecting comprehensive performance of light curtain and safety grating |
| CN105035927A (en) * | 2014-05-02 | 2015-11-11 | 恩索塔有限公司 | A method of operating an automatic door installation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100491225C (en) | 2009-05-27 |
| HK1090012A1 (en) | 2006-12-15 |
| CN1765726A (en) | 2006-05-03 |
| CN1212964C (en) | 2005-08-03 |
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