JPS5960586A - Pedestrian number counting device - Google Patents

Abstract

PURPOSE:To eliminate an erroneous measurement by executing an exact counting by calculating a walking speed of a pedestrian and human body width of the pedestrian by use of two sets of light emitting devices and photodetectors, and counting, displaying and recording the number of the pedestrian sensed by a decision of the obtained human body width. CONSTITUTION:When a pedestrian walking along a path passes through between light emittig devices 1a, 1b and photodetectors 2a, 2b, optical beams La, Lb placed at a distance l are cut off, therefore, a cut-off pulse waveform is obtained n the photodetectors 2a, 2b. The distance l is held at a smaller value than the minimum value considered as human body width, for instance, 10cm. The outputs of the photodetectors 2a, 2b are inputted to a count-processing part 3, and are time-counted by a clock pulse from a timing generator 5. The processing part 3 calculates the walking speed of the pedestrian and the human body width of the pedestrian detects the passing of the pedestrian by the decision of the obtained human body width, counts the sensed number of the pedestrians at every section provided by a unit time or an external condition, sums it up, and displays and records it. In this way, the erroenous measurement can be prevented by executing the exact counting.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pedestrian number counting device. 2. Description of the Related Art Devices that detect and count pedestrians have been known in the art. However, in such devices, when a pedestrian interrupts the main beam of the photoelectric switch, the light receiver detects the interruption of the light beam and counts each interruption as a pedestrian minus a person. The light beam of the photoelectric switch may be interrupted intermittently by the shaking of a pedestrian's arm or leg, the pedestrian's umbrella or baggage, or the pedestrian's clothing.

Since the device counts these minute chatter beam interruptions as pedestrian interruptions, such conventional devices have the disadvantage of generating glass errors.

It is an object of the present invention to provide a pedestrian number counting device that completely prevents such errors and accurately counts the number of pedestrians after determining one pedestrian.

An embodiment of the pedestrian number counting device according to the present invention will be described with reference to the drawings.

FIGS. 1(a) and 1(t) are explanatory diagrams of an embodiment of the optical sensing section of the pedestrian counting device according to the present invention. FIG. In the case where the light emitter and light receiver are both installed on one side of the passage, and a recurrent reflector plate is installed on the opposite side. Figure 1(a).

In (b), la and lb are light emitters, 2 a r
2 b is the light receiver, La and Lb are the light emitters 1a and lb
The original beam emitted from , La' and Lb' are reflected light beams.

3 is a counting processing section, 4 is a pedestrian, and 5 is a timing pulse generator. Now, when a pedestrian 4 walking along the path passes between the light emitter and the receiver, the light beams La and Lb distributed at a distance are cut off.

The light receivers 2a and 2b output the full cutoff pulse waveform as shown in FIG. 2, where t is kept at a value 1, for example 10 (7), which is smaller than the minimum possible human body width. If the walking speed of pedestrian 4 is V m/sec, then the light beam L
A is blocked by the pedestrian's body at 11, and the light receiver 2a receives light again at t3.

Also, the light beam Lb is blocked at t2 and received again at t4.

The outputs of receivers 2a and 2b turn on when light is blocked and turn off when light is received.
It is configured so that.

The outputs of the light receivers 2a and 2b are input to a counting processing section 3. The counting processing unit 3 performs the following main processes and finally displays and records the output.

1) Storage of input cutoff pulses: The cutoff pulses output from the light receivers 2a and 2b are timed by a clock pulse of, for example, 1m5ec from the timing pulse generator 5, and the timed cutoff pulses are stored together with the clock. .

2) Calculation of pedestrian speed; As shown in the cutoff pulse in Fig.
, At the rising point of Lb'! The walking speed V of the pedestrian is determined from +12.

12-1, °°°゛° (1) Here, t is the distance between the beams, and as mentioned above, is selected to be a value less than the minimum human body width, for example, 10 cm.

3) Calculation of pedestrian body width; Next, find the width W of the human body of the person in the party.

W = vX (t3-tl)...
・(2) 4) ``Determination of pedestrian's body width; The counting processing unit 3 loses ``0 pulse'') I: Determine whether or not the output value is indeed due to a pedestrian.

Figure 2 continuous/I pulse et al.

t3- Perform all determinations of t2≧Tc -- t3).

Pedestrian - standard human body width 4OL:'n1.7=10α
Then, -Tc'' is 300ms. (3) By calculating the time of the two head pulses, the time II
If it is a dog, it is determined to be a pedestrian. This eliminates flash pulses caused by arms or baggage.

5) Determination of human body width and number of pedestrians: Next, the human body width determined as above is W, < w < w2 . . .
...A determination is made as to whether (4) applies. Here, Wl is preset as the minimum width of the human body that is normally considered. For example, Wl = 20 cm OW2 is the maximum width of the human body that is normally considered, and is preset with consideration to factors such as swelling of clothes in winter. For example, let W = 50 tyn.

If the calculated human body width W fully satisfies equation (4), it is determined that the pedestrian is passing alone.Furthermore, 11. If the determined human body width W does not satisfy equation (4), the following determination is made. .

W2 (W<vv, ...
・(5) Here, W3 is the width of two human bodies in J4, where there is no space between two pedestrians, and the beam C is blocked by the width of two pedestrians. For example, Wa=70 cm is set in advance.

If W satisfies equation (5), it is determined that there are two pedestrians.

6) Pedestrian counting; 1-1・If the returned human body width W is (4) price i/ii4 plus, there will be one person, and if W fully satisfies the formula (τ5), there will be two people and δ
1 “Count.

Incidentally, it is said that an increase in It of 2 Å or more hardly occurs.

When carrying out all of the above arithmetic and judgment processing, triangulation of the cutoff pulse waveform from the light receiver is performed.

7) Shaping of the cutoff/response waveform; The two cutoff pulse waveforms shown in Figure 2 are ideal cases, and in real life, the cutoff/J? Fine pulses and chattering often appear before and after the pulse. This occurs when the light beam is cut by all pedestrians, and is caused by the slight bending of one pedestrian in the front and back directions, and is caused by unevenness in clothing, shaking of the arm, etc. This chattering causes an error in the accurate calculation of the pedestrian speed (1 human body width), and it is preferable that the light shielding pulse be shaped to the net human body width without chattering.

Part 1 of the waveform in Figure 3 where there is no chattering. a.

Test the time widths of t and b.

t≧T, 'r, b≧T, ...(6)
-Scream pap Wl is 20 tyn, vo== 100 cm/
sec, Tp=200 msec.

When the equation (6) is fully satisfied, the rise and fall times of the cut-off control, -t1+L2+j3+j4, are determined.

If you don't need all that precision, use -11+'2, which includes chattering. j3+j4 may be separated.

8) Determining the cutoff pulse based on the distance between pedestrians - If the pedestrian path is narrow and two people cannot pass through, it is unthinkable to detect the width of the human body between two people. Furthermore, as shown in FIG. 4, when walking, pedestrians tend to maintain a constant interval Li, so the interval between continuous interruptions is examined.

ti'-13≧Tr and 2' t4≧, where Tr is capital=f(-1, L=30 cm, Vo=100CnV/sec
Then, if Tr=300 msec is satisfied, the object is selected for the next continuous light shielding/cerus gold treatment.

9) Displaying and recording the results of counting the number of pedestrians; The value obtained by counting all pedestrians from the processing of e) blocked by the above processing step 6) is the condition 1 for the purpose of counting pedestrians.
For example, to understand the status of all passengers boarding and alighting on a redundant system, fluctuations in the number of passengers getting on and off at a specific stop, and understanding the number of passengers getting on and off at each stop on a short-time system over time, etc. and perform aggregation processing, display, and recording.

FIG. 5 shows the counting processing section 3 of the pedestrian number counting device according to the present invention.
A flowchart of data processing is shown below.

In FIG. 5, 5 is a timing A/res generator, 6 is the output of the light receivers 2a, 2b, and various external conditions related to pedestrians from the related information sending device 15. An input device to which related information such as encoded input of a stop is input, and 7 is an input block 1fJ? of the data processing step 1) described earlier. J1 performs pulse timing processing
time circuit.

8 is the interruption made during the data processing step 1)? 9 is a waveform shaping circuit for shaping the cutoff pulse described in step 7);

Reference numeral 10 is a distance determination circuit for determining the cut-off pulse from the pedestrian distance described in step 8), and this circuit 10 is used depending on the conditions of the pedestrian path. The speed of the pedestrian and the human body width tH of the pedestrian
- Pedestrian speed and human body width calculation time 1, 12 is the pedestrian human body width determination and pedestrian determination circuit from the human body width described in steps 4) and 5), 13 14 is a pedestrian count circuit that counts pedestrians according to the pedestrian judgment result explained in step 6), and 14 is a display/recording device for the pedestrian count result explained in step 9). This is a circuit that displays and records all of the counting results for various items such as the status 1 of specific conditions, such as the usage status of bus time-saving routes and the boarding and alighting status of passengers at Tani stop on time-saving routes.

According to the pedestrian number counting device according to the present invention, by installing two sets of light emitters and light receivers, the pedestrian's walking speed and the width of the pedestrian's body can be determined, and these determined values can be further converted into several values. In order to accurately judge pedestrians by checking the Q of the pedestrian and excluding the JJ3 cases that deviate from the judgment, we use the conventional method to detect pedestrians' slight back and forth sway, such as irregularities in clothing, swaying of arms, and baggage. This prevents erroneous counting of the number pulses caused by pedestrians, etc., and enables accurate counting of pedestrians. Also, even if two pedestrians are moving in parallel, it can be determined and calculated by i\1', which can reduce the minus error cost. Lighting is blocked by the distance between the pedestrians and the pedestrians.
The accuracy of counting pedestrians has also been improved, such as being able to detect all of the objects and prevent erroneous rows from being caused by lifted baggage, etc.

In addition, the pedestrian counting method 1 according to the present invention can be used not only to detect passengers getting on and off a bus, but also to grasp the usage status of ticket gates at railway stations, grasp the situation at places where there are many people coming in and out, such as department stores, or It can be widely used for counting products in production processes.

[Brief explanation of drawings]

gp, Figures 1 (a) and (b) are explanatory diagrams of the elementary sensing unit of the pedestrian number counting device according to the present invention, Figure 2 is a diagram showing the waveform of the first pulse, and Figure 3 is the diagram. FIG. 4 is a diagram showing a waveform of a cutoff pulse including chattering, FIG. 4 is a diagram showing a cutoff pulse at w8, and FIG. 5 is a flowchart of data processing in the counting processing section of the pedestrian number counting device according to the present invention. In fig. la and lb are light emitters. 2a and 2b are light receivers, 3 is a counting processing unit, and 4 is a pedestrian. 5 is a timing pulse generator, 6 is an input device. 7 is a clock circuit, 8 is a memory circuit, and 9 is a waveform shaping circuit. 10 is a block IC1rz4'rus interval determination circuit, ]1 is a walking speed/human body 11&l output circuit. 12 is a pedestrian determination circuit. 13 is a pedestrian counting circuit, 14i<, t:'''J2 display/recording circuit, (r 17
P144'f,j'f@IL,T, fK w”lb
. Special application: Representative of Sumitomo Eikikori Co., Ltd., former 5P officer, former Ishishibe (and 1 other person) Figure 1, Figure 51□-1 5 489-

Claims (1)

[Claims] (]) Two sets of light emitters that are installed in a pedestrian path, and the distance between the y-color beams connecting the light emitter and receiver is maintained at a specific distance that is less than the minimum human body width. The pedestrian passing through the passageway intercepts the two original beams, and the pedestrian's walking speed and the pedestrian's body are determined from the blocking pulses included in the light reception signals of the two sets of MS receivers. The width of the pedestrian is calculated, the pedestrians are fully detected by determining the human body width obtained, and the number of detected pedestrians is calculated and totaled for each category given from the unit time or external influence, A pedestrian counting device characterized by comprising a counting processing unit for displaying and recording. (2) A walking speed of a pedestrian and a human body of a pedestrian are determined from light shielding pulses included in light reception signals of the two sets of light receivers. When calculating the total width, the pulse width without chattering of the cutoff pulse is Tp = f (~100), where KW1 is the minimum human body width, VC
is the maximum walking speed, and a light-blocking pulse having a pulse width equal to or greater than a value determined by the width of the human body is determined to be the width of the human body, and the light-blocking pulse is shaped to calculate the walking speed and the human body width of the pedestrian. Pedestrian counting device in the first range. (3) Installed in narrow aisles where pedestrians cannot walk side by side. There are two sets of emitters and receivers in which the distance between the original beams connecting the emitter and the receiver is maintained at a specific distance 1iia less than 1 F'l small human body width, and pedestrians passing through the entire passage are By completely blocking the two original beams, the interval between continuous blocking pulses included in the light reception signals of the two sets of photoreceivers is reduced to Tr=f(
--), V smile L is the distance between pedestrians, v (, is the maximum walking speed, and a pulse that continues for more than a time interval determined by The pedestrian's walking speed, the pedestrian's body width, and f!c are calculated from these cutoff pulses, and the pedestrian's path is sensed based on the obtained human body width. Within a pedestrian number counting device characterized by comprising a counting processing section that counts, totals, displays and records the number of sections given from the unit time or the external 71'-!