CN107123234A - A kind of automatic monitoring exit region crowd density device and its workflow - Google Patents
A kind of automatic monitoring exit region crowd density device and its workflow Download PDFInfo
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- CN107123234A CN107123234A CN201710266279.1A CN201710266279A CN107123234A CN 107123234 A CN107123234 A CN 107123234A CN 201710266279 A CN201710266279 A CN 201710266279A CN 107123234 A CN107123234 A CN 107123234A
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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Abstract
The invention discloses a kind of automatic monitoring exit region crowd density device and its workflow, including power module, the sensor assembly for also including carrying out digital signal acquiring, the signal conversion module for being connected with sensor assembly output end and carrying out data signal conversion, the control module that is connected with signal conversion module output end and the acousto-optic module for carrying out early warning is connected and is used for control module output end, the power module is electrically connected with sensor assembly, signal conversion module, control module and acousto-optic module respectively；Its workflow comprises the following steps：Digital signal acquiring；Data signal is changed；Data signal is calculated；Early warning.Compared with prior art, the present invention can effectively avoid a certain outlet excessively caused with crowded should not injures and deaths, shunting effectively can be carried out to the crowd of exit region by acousto-optic hint signal and dredged, raising evacuation efficiency.
Description
Technical field
The present invention relates to monitoring technical field, specifically, be a kind of automatic monitoring exit region crowd density device and
Its workflow.
Background technology
With the development of urbanization process, public heavy construction is on the increase.These building inner structures are complicated, crowd's height
It is intensive.When burst fire-disaster occurs（Such as fire, earthquake and probably attacking）, huge crowd pours into outlet, and personnel are panic and thin
Dissipate not in place, it is easy to occur crowded and trample and in turn result in casualties, consequence is extremely serious.Because crowd is to evacuation environment
Cognitive, translational speed and difference degree frightened at heart so that pedestrian's distribution is uneven in evacuation space.Therefore, some outlets
Evacuation pedestrian's quantity in region is on the low side, and evacuation pedestrian's quantity of some exit regions is on the high side.Wherein most typically going out
Mouth region domain occurs in the semi arch region that arch jam, i.e. crowd are concentrated in centered on outlet port.Work as outlet
When region crowd density is higher, influence will be produced on pedestrian's evacuation Path selection.If can be close to the crowd in exit region
Degree carries out real-time automatic monitoring, takes corresponding measure to remind crowd and evacuation pilot according to monitoring result, it is possible to effective
Shunting evacuation is carried out to crowd, evacuation efficiency is improved and reduces injures and deaths.
Traditional monitoring crowd density uses picture pick-up device, and picture pick-up device is typically placed in outlet port, can only be to exit point
It is monitored, i.e., a point is monitored, and can not can not monitors a face to being monitored in exit region scope crowd.
Meanwhile, general picture pick-up device can only carry out macroscopic monitoring to crowd, it is impossible to quantify.Although senior recognition of face picture pick-up device energy
Enough that number is counted, but it is in the presence of two deficiencies, first is that masking phenomenon can not be handled in crowd（In crowd height compared with
High people can shelter from the shorter people of height after one's death）, second its cost is too high, it is impossible to which extensive popularization is used.
The content of the invention
, can it is an object of the invention to provide a kind of automatic monitoring exit region crowd density device and its workflow
Effectively avoid a certain outlet overcrowding and cause unnecessary injures and deaths, can be effectively by acousto-optic hint signal to outlet
The crowd in region is effectively dredged, and improves evacuation efficiency.
The present invention is achieved through the following technical solutions：A kind of automatic monitoring exit region crowd density device, in addition to enter
The sensor assembly of row signal acquisition, the signal conversion module for being connected with sensor assembly and carrying out data signal conversion and letter
Number the modular converter control module carried out data transmission and the acousto-optic module being connected with control module, the power module difference
Electrically connected with sensor assembly, signal conversion module, control module, acousto-optic module.
Operation principle：When device is opened, if power switch is not switched on, device does not work.After power on, device
First initialized, modules is set to predetermined state, respective pins are also configured as original state.After the completion of initialization,
Sensor assembly carries out digital signal acquiring, and sensor assembly receiving terminal will produce two kinds of data signals（Shading when someone passes through
Data signal 1, no one is the thang-kng digital signaling zero that is in the normal state）, and the data signal gathered is passed into signal modulus of conversion
Block, signal conversion module carries out the conversion of data signal and new data signal is passed into control module, control module according to
Receive whether Digital Signals acousto-optic module carries out acousto-optic early warning.
Further, in order to preferably realize the present invention, the sensor assembly uses 16 road laser-correlation sensors, bears
Load electric current is 200mA, and detecting distance is 0-30 meters.
The signal conversion module include be connected with 16 road laser-correlation sensor outputs bleeder circuit, 4 models
Digital isolator and 1 model 74ACT16245 for IL715 and the 16 BITBUS network transceivers with triple gate；The partial pressure
Circuit, digital isolator and 16 BITBUS network transceivers are sequentially connected.IL715 digital isolators can not only be effectively eliminated and made an uproar
Acoustic jamming, while subsequent conditioning circuit can also be protected from high-tension impact, passes through 74ACT16245 OE1# and OE2# pins
16 railway digital signals are divided into 2 groups by just energy timesharing, and every group of 8 railway digital signal timesharing are input in follow-up control module.Partial pressure
Sensor assembly output make-and-break signal is converted to the data signal that IL715 can be received by circuit, and make-and-break signal is+12V,
The signal that IL715 can be received is+5V.
Further, in order to preferably realize the present invention, the control module includes and 16 BITBUS network transceiver output ends
Connection and model STC89C52 microcontroller and be connected respectively with microcontroller clock circuit, reset circuit and under
Carry circuit.
Control module receives the data signal from signal conversion module, is calculated by analyzing and processing these data signals
Crowd density, current crowd density state is pointed out by sound and high-brightness LED.Meanwhile, control module will also be changed to signal
Module sends corresponding control data signal.
Control module main function is that timesharing receives 16 railway digital signals, and 8 tunnels are received every time.According to make-and-break signal ratio and
Pin controls alarm speaker phonation time and LED flash frequency.Meanwhile, pass through pin control signal change-over circuit
74ACT16245 OE1# and OE2# output Enable Pin, plays 16 tunnels input data signal being divided into 2 groups, one group of 8 tunnel output.
Further, in order to preferably realize the present invention, the acousto-optic module includes with microcontroller output connecting respectively
The alarm speaker and high-brightness LED connect.
Further, in order to preferably realize the present invention, it is characterised in that：Power module use+the 5V/+12V's is straight
Power supply is flowed, wherein+12V the dc sources are electrically connected with sensor assembly, alarm speaker ,+5V dc sources the difference
Electrically connected with signal conversion module, control module, high-brightness LED module.
Further, in order to preferably realize the present invention, in addition to power switch, the power module passes through power switch
Electrically connected respectively with sensor assembly, signal conversion module, control module and acousto-optic module；The power switch is used
KCD1-1-101 hilted broadsword ships type is switched.
A kind of workflow of automatic monitoring exit region crowd density device, comprises the following steps：
Step S2：Digital signal acquiring；Using 16 road laser-correlation sensors in real time to the crowd density in the range of exit region
It is monitored, and 16 railway digital signals of collection is sent to signal conversion module；
Step S3：Data signal is changed；
Step S4：Digital Signal Analysis processing；Control module receives the data signal of signal conversion module output, at analysis
Reason data signal calculates crowd density, and current crowd density state is pointed out by sound and high-brightness LED；Control module is to reality
When the data signal that receives be compared with predetermined state, judge whether to reach early warning value：It is to carry out acousto-optic early warning；It is no, then
Without early warning；Complex digital signal of laying equal stress on is gathered.
Further, in order to preferably realize the present invention, the data signal conversion specifically includes following steps：
Step S31：The make-and-break signal that sensor is exported is converted to the data signal for meeting digital isolator by bleeder circuit；
Step S32：The make-and-break signal that received sensor is sent is sent to 16 BITBUS network transceivers, bus by digital isolator
16 railway digital signals are divided into 2 groups by transceiver, and every group of 8 railway digital signal timesharing are input to control module.
Further, in order to preferably realize the present invention, before step S2, it is additionally provided with step S1：Switch on power, set
Predetermined state；After power on, device is first initialized, and modules is set to predetermined state.
The present invention compared with prior art, with advantages below and beneficial effect：
（1）The present invention can be effectively prevented from because the overcrowding of outlet causes unnecessary injures and deaths.
（2）The present invention is provided with acousto-optic module, and the crowd of exit region effectively can be dredged by sound and light signal,
Improve evacuation efficiency.
（3）The present invention is provided with digital isolator, can effectively eliminate noise jamming, at the same protect subsequent conditioning circuit from
High-tension impact.
Brief description of the drawings
Fig. 1 is connection diagram of the invention；
Fig. 2 is circuit theory diagrams of the invention；
Fig. 3 is the schematic diagram of digital isolator in the present invention；
Fig. 4 is the schematic diagram of bus transceiver in the present invention；
Fig. 5 is the schematic diagram of microcontroller in the present invention；
Fig. 6 is the connection diagram of controller download circuit in the present invention；
Fig. 7 is the connection diagram of controller reset circuit in the present invention；
Fig. 8 is the connection diagram of controller clock circuit in the present invention；
Fig. 9 is workflow diagram of the invention.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1：
The present embodiment does further optimization on the basis of above-described embodiment, as Figure 1-Figure 8, a kind of automatic monitoring outlet area
Domain crowd density device, including power module, in addition to carry out the sensor assembly, defeated with sensor assembly of digital signal acquiring
Go out end connect and carry out the signal conversion module of data signal conversion, the control module that is connected with signal conversion module output end with
And be connected and be used for the acousto-optic module for carrying out early warning with control module output end, the power module respectively with sensor assembly,
Signal conversion module, control module and acousto-optic module electrical connection.
When device is opened, if power switch is not switched on, device does not work.After power on, device is first carried out just
Beginningization, makes modules be set to predetermined state, and respective pins are also configured as original state.After the completion of initialization, sensor die
Block carries out digital signal acquiring, and sensor assembly receiving terminal will produce two kinds of data signals（Shading data signal when someone passes through
1, no one is the thang-kng digital signaling zero that is in the normal state）, and the data signal gathered is passed into signal conversion module, signal turns
Mold changing block carries out the conversion of data signal and new data signal is passed into control module, and control module is according to receiving numeral
Whether signal control acousto-optic module carries out acousto-optic early warning.The other parts of the present embodiment are same as the previously described embodiments, therefore no longer go to live in the household of one's in-laws on getting married
State.
Embodiment 2：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Fig. 2 the sensor assembly uses 16 tunnels
Laser-correlation sensor, load current is 200mA, and detecting distance is 0-30 meters.
It should be noted that passing through above-mentioned improvement, 16 road laser-correlation sensors, using the normally opened modes of NPN, i.e. transmitting terminal
After receiving terminal pairing, if object shelters from photoelectricity, then receiving terminal has data signal output, shading data signal 1；Normality
Thang-kng data signal is 0；The line of transmitting terminal two（Power and ground）, the line of receiving terminal three（Power line, ground wire and output numeral letter
Number）；
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 3：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Figure 2, Figure 3, Figure 4, the signal modulus of conversion
Bleeder circuit that block includes being connected with 16 road laser-correlation sensor outputs, 4 model IL715 digital isolator and
1 model 74ACT16245 and the 16 BITBUS network transceivers with triple gate；The bleeder circuit, digital isolator and 16
Bus transceiver is sequentially connected.
It should be noted that by above-mentioned improvement, 16 road laser-correlation sensor output digit signals are+12V break-make
Signal, and control module can only receive+5V data signal.Therefore must by sensor output make-and-break signal be converted to+5V and
0V data signal.In order to which+12V sensor output digit signals to be become to+5V data signal, bleeder circuit has been used,
Wherein 1 tunnel use R01 and R17, wherein R1=7K Ω, R17=5K Ω, thus make the data signal for being input to IL715 be adjusted to+
5V, in addition 15 route R02-R32 completions.The effect of IL715 digital isolators is in order to eliminate noise jamming, it can in addition contain protect
Subsequent conditioning circuit is protected from high-tension impact.
The effect of 74ACT16245 transceivers is mainly control packet output digit signals, because control module pin has
Limit, and inputting has 16 railway digital signals, the data signal on OE1# and OE2# pins by controlling 74ACT16245, can just divide
When 16 railway digital signals are divided into 2 groups, every group is divided into 8 railway digital signal timesharing and is input to follow-up control module.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 4：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, the control mould
Block include be connected with 16 BITBUS network transceiver output ends and model STC89C52 microcontroller and respectively with microcontroller
Clock circuit, reset circuit and the download circuit of connection.
It should be noted that by above-mentioned improvement, control module is mainly made up of STC89C52 microcontrollers, control module
Main function is that timesharing receives 16 railway digital signals, and 8 tunnels are received every time.According in 16 railway digital signals 0 and 1 ratio warp
P1.3, P1.5 pin control alarm speaker phonation time and LED flash frequency.Meanwhile, drawn by P1.1 and P1.2
Foot control signaling conversion circuit 74ACT16245 OE1# and OE2# output Enable Pin, plays 16 railway digital signals being divided into 2 groups,
The purpose of every group of 8 tunnels output.Additional control module also includes clock circuit, electric capacity C1, C2 and crystal oscillator Y1 compositions, and crystal oscillator frequency is
12MHz, frequency can be finely adjusted by C1 and C2.Reset circuit is constituted by switching K3, electrochemical capacitor C7 and resistance R34.
STC89C52 microcontrollers need to reset in start after electricity, so ensure that the functional part of control module is in one really
Fixed original state.Control module has RST pins as reset signal input, and the pin is that high level is effective, high level letter
Number continue 24 more than the clock cycle with regard to reset signal can be produced, so that STC89C52 resets；Download circuit passes through RS-232
Serial ports and MAX232 communication interface chips composition.Control routine instruction in controller downloads to controller by microcomputer
In.Controller and computer enter row data communication by serial ports, but the signal level that provides of controller and RS-232 standard are not
Equally, therefore level conversion is carried out by MAX232.
Control module core is STC89C52 microcontrollers, and microcontroller needs to reset after the upper electricity of start really, such energy
Enough ensure that the functional part of control module is in the original state of a determination.Control module has RST pins as reset signal
Input, the pin is that high level is effective, and high level signal continues 24 more than the clock cycle with regard to that can produce reset signal, so that
Reset STC89C52.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 5：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Fig. 2 the acousto-optic module include respectively with
The alarm speaker and high-brightness LED of microcontroller output connection.
It should be noted that by above-mentioned improvement, acousto-optic module mainly include loudspeaker, high-brightness LED, triode Q1,
Sustained diode 2 and triode Q2, triode Q1 play driving alarm speaker and on-off action, and triode Q1 is by control mould
P1.3 in block controls the break-make of sound, and sustained diode 2 is used for protecting alarm speaker not to be induced voltage breakdown or burning
Bad, it is connected to the alarm speaker two ends for producing induced electromotive force, and formed loop in parallel, alarm is raised one's voice
The high electromotive force that device is produced is consumed in loop with continuous current system, is not damaged by so as to play a part of protection loudspeaker.Electric capacity
C8 main functions are filtering.Triode Q2 mainly plays driving high-brightness LED and on-off action, and it is controlled by the P1.5 in control module
Break-make processed.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 6：
The present embodiment does further optimization on the basis of above-described embodiment, as shown in Fig. 2 the power module use+5V/+
12V dc source, wherein+12V the dc sources are electrically connected with sensor assembly, alarm speaker ,+5V the direct currents
Source is electrically connected with signal conversion module, control module, high-brightness LED module respectively.Also include power switch, the power module
Electrically connected respectively with sensor assembly, signal conversion module, control module and acousto-optic module by power switch；The power supply
Switch is using KCD1-1-101 hilted broadsword ships type switch.
It should be noted that by above-mentioned improvement, using+5V/+12V Switching Power Supply to provide stabilization for control device can
The power supply supply leaned on.Simultaneously using KCD1-1-101 hilted broadsword ships type switch, when the switch is closed, device is started working.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 7：
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, a kind of automatic monitoring exit region crowd density dress
The workflow put, comprises the following steps：
Step S1：Switch on power, set predetermined state；After power on, device is first initialized, and is set to modules
Predetermined state.
Step S2：Digital signal acquiring；Using 16 road laser-correlation sensors in real time to the crowd in the range of exit region
Density is monitored, and 16 railway digital signals of collection are sent into signal conversion module；
Step S3：Data signal is changed；
Step S31：The make-and-break signal that sensor is exported is converted to the data signal for meeting digital isolator by bleeder circuit；
Step S32：The make-and-break signal that the sensor received is sent is sent to 16 BITBUS network transceivers, bus by digital isolator
16 railway digital signals are divided into 2 groups by transceiver, and every group of 8 railway digital signal timesharing are input to control module.
Step S4：Digital Signal Analysis processing；Control module receives the data signal of signal conversion module output, by dividing
Analysis processing data signal calculates crowd density, and current crowd density state is pointed out by sound and high-brightness LED；It will connect in real time
The data signal received is compared with predetermined state, judges whether to reach early warning value：It is to carry out acousto-optic early warning；It is no, then do not enter
Row early warning；Complex digital signal of laying equal stress on is gathered.
It should be noted that by above-mentioned improvement, when device is opened, if power switch（K1 and K2）It is not switched on, then
Device does not work.If power switch is connected, power circuit uses for the power voltage supply road that device provides+5V and+12V.Electricity
After source is connected, device is first initialized, and modules is set to predetermined state, and respective pins are also configured as original state.
After the completion of initialization, device starts the laser-correlation sensor on M01-M16 totally 16 tunnels, and sensor is all distributed in centered on outlet
And radius in 3 meters of half-circle area.When someone passes through on sensor, sensor receiving terminal will produce shading data signal 1,
No one is the thang-kng digital signaling zero that is in the normal state.The 16 railway digital signals that laser-correlation sensor is gathered are by 4 photoelectric figures
Isolator IL715 is entered in 74ACT16245 bus transceiver chip, and 16 railway digital signals are divided into 2 by bus transceiver
16 railway digital signals are constantly sent in control module STC89C52 by group, every group of 8 tunnels, circulation.STC89C52 does not stop timesharing and patrolled
Examine 16 railway digital signals, according to 16 railway digital signals 0, the state of data signal 1 it is known that crowd exit region density.
Then flash for prompting is carried out to sound and LED according to statistical result, it is specific as follows：In 16 railway digital signals, when shading numeral
When the state of signal 1 is less than or equal to 4 tunnel, crowd density will be in low-level, belong to unimpeded state, sound and light alarm is not pointed out；Hide
The state of light data signal 1 is more than 4 tunnels and is less than or equal to 8 tunnels, and crowd density is in medium level, state of walking or drive slowly, and acousto-optic hint is 9
Second is once；The state of shading data signal 1 is more than 8 tunnels and is less than or equal to 14 tunnels, and crowd density is in high level, congestion state, sound
Light prompts for 6 seconds once；The state of shading data signal 1 be more than 14 tunnels, crowd density be in superelevation level, serious congestion state,
Acousto-optic hint be 3 seconds once.Control module is using endless form constantly 16 railway digital signals of collection, until user's arresting stop fortune
OK.
The other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 8：
As shown in Fig. 2-Fig. 8, input of the sensor assembly by bleeder circuit respectively with four model IL715 data isolation devices
Pin 3,4,5,6 is connected, the output pins 11,12,13,14 of four IL715 data isolation devices respectively with 16 BITBUS network transceivers
74ACT16245 input pin 26-47 connections；Its output pin 1B1-1B4 is corresponded with 2B1-2B4 merges one group 4 of formation
Railway digital signal output to STC89C52 microcontrollers pin 21-24, output pin 1B5-1B8 and 2B5-2B8 correspond
Merging forms another group of 4 railway digital signal outputs to the pin 25-28 of STC89C52 microcontrollers, thus forms the input of 8 tunnels
Signal；STC89C52 microcontrollers are connected by output pin 2,3 and 16 BITBUS network transceiver 74ACT16245 input pins 48,25
Connect, realize that output is sent to signal conversion module enables signal, 74ACT16245 pins 1 and 24 are constantly in high level state,
Represent that 16 BITBUS network transceivers are constantly in transmission state；Clock circuit is connected with STC89C52 microcontrollers pin 18,19
Connect；Download circuit MAX232 chip pins 9,10 are attached with STC89C52 microcontrollers pin 10,11；STC89C52 micro-controls
Device processed is attached by output pin P1.3, P1.5 and acousto-optic module, realizes the control to acousto-optic module, STC89C52 micro-controls
Pin 9 and the reset circuit of device processed are attached.
When P0 mouthfuls of STC89C52 controllers are exported as I/O mouthfuls, output low level is 0, and output high level is high-impedance state（Phase
When in vacant state, P0 mouthfuls can not really export high level）.In order to provide electric current to load, it is necessary to connect pull-up resistor ,+5V
Power supply provides electric current by this pull-up resistor to load.P0 mouthfuls have 8 pins, it is therefore desirable to connect 8 pull-up resistors（R38-
R45）, the resistance of pull-up resistor is 4.7K Ω.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
According to the present invention technical spirit above example is made any simple modification, equivalent variations, each fall within the present invention protection
Within the scope of.
Claims (10)
1. a kind of automatic monitoring exit region crowd density device, including power module, it is characterised in that：Also include carrying out numeral
The sensor assembly of signal acquisition, the signal conversion module and signal for being connected with sensor assembly and carrying out data signal conversion
Control module and carry out data transmission with control module and be used for the acousto-optic module of early warning that modular converter carries out data transmission,
The power module is electrically connected with sensor assembly, signal conversion module, control module, acousto-optic module respectively.
2. a kind of according to claim 1 monitor exit region crowd density device automatically, it is characterised in that：The sensor
Module uses 16 road laser-correlation sensors, and load current is 200mA, and detecting distance is 0-30 meters.
3. a kind of according to claim 2 monitor exit region crowd density device automatically, it is characterised in that：The signal turns
Mold changing block includes bleeder circuit, the 4 model IL715 digital isolator being connected with 16 road laser-correlation sensor outputs
And 1 model 74ACT16245 and the 16 BITBUS network transceivers with triple gate；The bleeder circuit, digital isolator and
16 BITBUS network transceivers are sequentially connected.
4. a kind of according to claim 3 monitor exit region crowd density device automatically, it is characterised in that：The control mould
Block include be connected with 16 BITBUS network transceiver output ends and model STC89C52 microcontroller and respectively with microcontroller
Clock circuit, reset circuit and the download circuit of connection.
5. a kind of according to claim 4 monitor exit region crowd density device automatically, it is characterised in that：The acousto-optic mould
Block includes the alarm speaker and high-brightness LED being connected respectively with microcontroller output.
6. according to a kind of any one of claim 1-5 automatic monitoring exit region crowd density devices, it is characterised in that：Institute
Power module use+5V/+12V dc source is stated, wherein+12V the dc sources and sensor assembly, alarm speaker
The electrical connection ,+5V dc sources are electrically connected with signal conversion module, control module, high-brightness LED module respectively.
7. a kind of according to claim 6 monitor exit region crowd density device automatically, it is characterised in that：Also include power supply
Switch, the power module by power switch respectively with sensor assembly, signal conversion module, control module and acousto-optic mould
Block is electrically connected；The power switch is switched using KCD1-1-101 hilted broadsword ships type.
8. a kind of workflow of automatic monitoring exit region crowd density device, it is characterised in that：Comprise the following steps：
Step S2：Digital signal acquiring；Using 16 road laser-correlation sensors in real time to the crowd density in the range of exit region
It is monitored, and 16 railway digital signals of collection is sent to signal conversion module；
Step S3：Data signal is changed；
Step S4：Digital Signal Analysis processing；Control module receives the data signal of signal conversion module output, at analysis
Reason data signal calculates crowd density, and current crowd density state is pointed out by sound and high-brightness LED；Control module is to reality
When the data signal that receives be compared with predetermined state, judge whether to reach early warning value：It is to carry out acousto-optic early warning；It is no, then
Without early warning；Complex digital signal of laying equal stress on is gathered.
9. a kind of workflow of automatic monitoring exit region crowd density device according to claim 8, it is characterised in that：
The data signal conversion specifically includes following steps：
Step S31：The make-and-break signal that sensor is exported is converted to the data signal for meeting digital isolator by bleeder circuit；
Step S32：The make-and-break signal that received sensor is sent is sent to 16 BITBUS network transceivers, bus by digital isolator
16 railway digital signals are divided into 2 groups by transceiver, and every group of 8 railway digital signal timesharing are input to control module.
10. a kind of workflow of automatic monitoring exit region crowd density device according to claim 8, its feature exists
In：Before step S2, step S1 is additionally provided with：Switch on power, set predetermined state；After power on, device is first carried out initially
Change, modules is set to predetermined state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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Application publication date: 20170901 |