JPS5816419A - Optical switch for automatic door - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical switch for automatic doors. The optical switch for automatic doors of the present invention relates to an optical switch for automatic doors that optically senses when a passing body such as a person passes through the entrance area and automatically opens and closes the door. It is.

Optical koji cutoff switches, radar sets, or sonic switches that issue a signal when a person or the like crosses are known. However, the beam cutoff switch does not have an area switch,
A radar set or a sonic switch has the disadvantage that the detectable area is not clear (and a dead zone is created, so it is necessary to use it as an auxiliary switch during the beam cutoff switch. Furthermore, these area switches have a disadvantage that the detectable area is It is impossible to detect the direction of movement of a moving person.

The present invention detects when a person 8 etc. approaches the entrance of an automatic door without transmitting special lighting or known signals,
To provide a light beam type area switch that enables judgment of the direction of movement whether to release a door or not.

Hereinafter, the present invention will be explained in detail according to the embodiments shown in the drawings.

FIG. 1 shows an automatic door opening/closing device using the automatic door optical switch of the present invention.

The automatic door-closing device collects the natural light reflected from the detection wI into a lens 1, which is then focused into a large number of optical fibers 1 installed in the lens barrel. The light receiving portion 4 is sensed by the light receiving portion 1IIsa, abS3@, sa formed by no Sle&, and the photoelectric conversion portion 81, sb, ** is converted into each light 7 eye bundle extending from the light receiving portion. S@sa
a Voltage change detecting section 6aS14'b, no, 6d for detecting change in the output of the M light converting section 11; It consists of a drive unit 8 that closes the door in response to a signal from a selection circuit.

＞ You may also use a zoom lens. The light receiving surface 113 is a light receiving surface made by bundling a large number of 7-eyeper 1 lights, converging a large number of optical fiber bundles, and using the end faces of these 7-eyeper bundles as segmented light receiving surfaces (in actual m11, there are 4 segmented light receiving surfaces). The light-receiving direction of the light-receiving direction will be explained below. Therefore, the lens is adjusted to focus on the detection surface (floor surface) 1 in the drawing.

Photoelectric conversion units 8 a to 5 (1 is the amount of light (
! # degree) and replaces it with electrical conductivity (resistance value), and the voltage detection circuit 6&~6d is a differential sensor that senses the difference between the output voltage of the photoelectric conversion section and the reference value. By controlling the gain of Amplifier 1110 according to the differential output of Amplifier &9, Amplifier 910 which amplifies the differential output thereof, and Differential Amplifier @-10, the Amplifier output of Amplifier 1110 is kept constant. 7t a9-
The direction of movement of the detection signal .PHI. of the detection section 1 is determined by the direction-specific circuit 2, and the drive section 2 is operated according to the amount of door radiation. As the photoelectric conversion elements of the photoelectric conversion parts ja to 3d, o61 (Sulfide Cad R&M) was used in the example. The light-receiving directions of the light 7 eyebar support stands 11 to 1d on the floor are exposed to ultraviolet light.
Visible light, sunlight, and heat are all received as they are, but since optical fiber is used, the seven eyepers serve as filters, and only visible light propagates through the fiber inside the vehicle. can do. Since the sensitivity wavelength of AIM is close to the visual sensitivity of human eyes, it is considered that it is very compatible with 7-Eye Per.

The direction-specific circuit 7 has a holding yI1kgg which holds the detection signal or ■ supplied through the orgame) 21 for a certain period of time even after its disappearance, and a detection signal ■ or Φ supplied through the orgame) 2B and the holding path 2. It is more consistent with the anime (Anto-game) 24, which uses human power to output the idle output. direction! Ill
The separate circuit 20' is not limited to this, and another path may be used.

Now, when the entrance light, sunlight, or other light that can be sensed by Ozeki is entering through a lens tube whose detection direction a is aligned with the focal side ■, if a person, etc. enters the detection area ■, it will be detected Fj.
The reflected light of iJ& is blocked, therefore, the light receiving surface 3 a w
8 The amount of light received by & decreases, and the illuminance of the optical fiber towards the east decreases. Such a decrease in illuminance is caused by the photoelectric conversion unit B&~!
The photoelectric conversion element of Id senses the electrical conductivity (resistance value) and generates an output voltage according to the amount of received light. This output voltage is detected by each differential amplifier 99 as a difference voltage with respect to the reference value, and this differential output is detected by each differential amplifier 99.
When the signal is amplified by the MUGO1i path 11, a sufficient amplification output change may occur because the MUGO1i path 11 cannot follow the almost sudden movement of a human approaching. The relationship between the amount of light (fish skin) propagating through the optical 7 taper and the electrical conductivity (resistance value) of the optical 11 conversion element (o 6 m) is the jth! As shown in the figure.

This is expressed as the illuminance vs. resistance characteristic of the light receiving element.

Assuming that the photoelectric conversion section is now stationary at point 71, the output voltage of the photoelectric conversion section m at that time is vlv1. When Mashima enters the detection area, the illuminance moves from point S71 to point S78, and the VB voltage also moves from vl to v8. The amount of light received by Hikari 7 Eyeper East constantly fluctuates due to daily differences, weather, etc., but when the steady differential output of differential amplifier II 9 increases as the amount of light increases, the mu GO circuit 11 lowers the gain of amplifier -10. When the amount of light decreases, the gain is increased to balance the output voltage to the reference level.

However, if a person or the like enters the detection area and suddenly changes the amount of received light in any direction of the segmented light reception l113&~St, the differential voltage detection units 61 to 61
1, an increase in output change, ie, a change in the detection signal occurs. Therefore, when the detection signal (or) is generated in the direction identification path 2, the hold path 31 is activated through the OR gate sO, and one input of the ant gate 33 is set to H level.

If the detection signal C or Φ is generated within a predetermined time even after the detection signal 2 or Hirono disappears, the other input of the game F33 becomes level 5, and a door open signal is given to the drive unit 8.

If the received light passes through the detection area in the direction of EkI3 & and 31), the signal is not retained and the AND gate 3
3 remains at the L level, and no door opening signal is generated to the drive unit 8. Even if the sensor passes through the detection area in the direction of 0 light receiving directions 3c and 3d, the other input of the AND gate 33 simply becomes the H level. The door release signal will not be generated. When passing through the detection area from the light-receiving surface 30 or 3d in the direction of 3a or sb, when the detection signal C or Φ is generated, the H level signal is not supplied from the OR gate g3, so the door welcome signal will not occur as in the case of 辷. .

Only when the sensor passes through the detection area from the light receiving area 113m or 3b toward 30 or Sa, the direction identification circuit generates a door signal.

In addition, in order to further improve the judgment accuracy, the number of light-receiving surfaces is further increased in the vertical and horizontal directions, and the direction discrimination is 1 mm 1 k?
By using the microphone dicombi Hatake-Yu, the output state of the voltage change detection path belonging to the light-receiving surface in each direction is scanned at a constant cycle by a sequence pass, and the address corresponding to each light-receiving surface in the memory is stored. It is also possible to determine the direction of travel from the change pattern of stored data. At this time, data such as the number of passersby can also be obtained if necessary.

According to the present invention, it is possible to obtain an ms+ switch in which the detection section is attached to the sensor and only the open end of the lens barrel is exposed to receive light.

A lens barrel with a structure that allows adjustment of the focal length and light intensity of the lens even if the height of the detection surface and the light receiving section is maximized is preferable. This switch has an extremely accurate WM detection area compared to the conventional Ikkoku switch, does not need to send a known signal, and works accurately even if the pedestrian speed is fast or uneven. It can be used with any type of door, including double-sided double doors, and is not affected by external noise, changes in outside temperature, the level of temperature, water intrusion, etc., so there is no malfunction. Furthermore, conventional automatic door devices interfere with each other and operate when a common device is used for the entrance and exit, but according to the switch of the present invention, even if a single device is used for the entrance and exit, they will not interfere with each other and cause malfunctions. It will never occur.

Since the switch of the present invention is actuated only by changes in the amount of light on the detection surface, its structural life can be made semi-permanent, which simplifies maintenance and has the effect of increasing the flexibility of quality. Further, according to the switch of the present invention, it is possible to determine the direction of movement of a person and to use it as a switch capable of calculating the number of people in each direction of movement.

[Brief explanation of the drawing]

m1ll(4) is the structure of the automatic door opening/closing device using the optical switch for automatic doors of the present invention, and the structure of the automatic door opening/closing device using the optical switch for automatic doors of the present invention, No. 1II ((9)
2 is an enlarged view of the 5-yaHIIT plane, FIG. 2 shows the illuminance vs. resistance characteristic of the light receiving element, and slQ shows the circuit configuration of the direction sense WJkdlI. M60. Automatic door opening/closing device 110. Lens tube SI00. Hikari 7 Eyeper gaNJ) 1
．． ,,Optical fiber bundle 3&~sa,,,-tDament light reception- 100,Light receiving part B&~6(1,,,Light 11 Replacement part 6&~66,...%pressure change detection part?00.Direction identification circuit S00 .Drive section 10.,,Amplification- 11,,,MuaO#A@ Procedural correction a (spontaneous) June 7, 1986 Showa A6 I1 Patent 1 1st engineering 4g9? No. 2, M@ name Optical switch for automatic doors 3 Relationship with the case of the person who makes the amendment Patent ms Jinsho "" Station Department,) He'Fi Denteshi Co., Ltd. 4, Written amendment of attorney's procedure (Iii li) November 1986 Jiffi δ Patent Office Director Hibiki Shimada, 1986 Patent Application No. 11419? 2. First title of the invention: Optical switch for automatic doors 3. Relationship with the case of the person making the amendment Patent applicant: 1. Address No. 14, Seigyo, Machida City, Tokyo - Mr. Fumu Lado Name (Famous ship: Honda Electronics Co., Ltd. 4, Agent As per attached sheet 1, Detailed explanation of the invention column is corrected as follows. 1) 3 Correct "Zum" in the third line from the bottom of the page to "Zoom". 2) In the 8th line from the bottom of the page, correct "Differential amplifier 10" to "Differential amplifier 9" ◇ 3) In the 2nd line from the bottom of page 4 [Photoelectric conversion units 3g-3aJ] [Photoelectric conversion units b&~aaJ
Correct U°. 4) From the bottom of page 4, correct line ``odsJ'' by 1 to ``Cda''. s) Delete the 1st and 2nd lines from s purchase, ``Light-receiving surface of optical fiber support 1a-yld on the floor'', and change [segment light-receiving direction 3 &
~3 (Add IJ. 6) From the 6 purchase to the 7th line, ``Correct odaJ by 1 to ``0dlI''. 7) Correct "ORGATE 21" in the 10th line from directly above 5 to "ORGATE 30". 8) On the 9th line from the bottom of page 5, correct "Holding circuit 22" to "Holding circuit 31" and "OR gate 23" to "OR gate 32". 9) On the 8th to 7th lines from the bottom of page 5, correct "Holding circuit 22" to "Holding circuit 31" and "AND gate 24" to "AND gate 33"0 10) On the 6th line from the bottom of page 5 "Direction identification circuit 20J" is corrected to "Direction identification circuit 7". 11) On the 9th line from the bottom of page 6, rd, J is corrected to [Oas J. 12) Correct the 6th stroke from the top of page 8, ``ORGATE 23'', to ``ORGATE 30J.'' 2. Fix Figure 3 as shown in paper 8.

Claims (1)

[Claims] A light-receiving section is provided with a light-receiving section that is formed by a large number of optical 7-taper east and arranged so as to meet the focus position of the lens, a photoelectric element*i+ui connected to the winter-light 7-taper east extending from the light-receiving section, and It consists of a voltage change detection section that detects a change in the output of the photoelectric conversion section and a circuit board that analyzes the detected deviation amount of the voltage tabulation detection section, and detects a change in the output of the photoelectric conversion section due to a passing object. An automatic door M optical switch is configured to determine the traveling direction of the passing object based on a clear detection signal and automatically close the door.