CN107651550A - A kind of staircase malfunction monitoring and prior-warning device - Google Patents
A kind of staircase malfunction monitoring and prior-warning device Download PDFInfo
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- CN107651550A CN107651550A CN201710871405.6A CN201710871405A CN107651550A CN 107651550 A CN107651550 A CN 107651550A CN 201710871405 A CN201710871405 A CN 201710871405A CN 107651550 A CN107651550 A CN 107651550A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B29/00—Safety devices of escalators or moving walkways
- B66B29/005—Applications of security monitors
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Abstract
A kind of staircase malfunction monitoring and prior-warning device proposed by the present invention, belong to staircase safety control technology field, the device is realized by two pieces of PCBs；First PCB is installed on by staircase motor, and the circuit board is provided with current signal Acquisition Circuit, voltage signal acquisition circuit, safety switch signal acquisition circuit, master computing module and communication module；Second PCB is installed on staircase motor bearing, and vibration signals collecting circuit is provided with the circuit board；Master computing module is used to obtain the current and voltage signals of motor in staircase running, vibration signal and the safety switch signal for detecting step deletion, pedal is broken, handrail is broken；Master computing module is also communicated by communication module with advertising integrated machine.The present apparatus is simple in construction, cost is low, installation is simple, versatile, is monitored and analyzed by the running status to staircase and collection signal to judge whether failure or hidden danger, and provide occupant ride suggestion.
Description
Technical field
The invention belongs to staircase safety control technology field, the malfunction monitoring and prior-warning device of more particularly to a kind of staircase.
Background technology
As a kind of vehicles, staircase is at the train station, subway station, the public place that the stream of people is big, distance is short such as market obtain
To being widely applied, brought great convenience for the life of people.With the increasingly increase of staircase quantity, its security
Have been a great concern.
Staircase manufactory commercial city larger at present is proposed monitoring system for the staircase of oneself brand, and these systems are main
Lay particular emphasis on and be intuitively illustrated in the overall operation state of staircase on the host computer of Control Room, realize fault-signal transmission and
Alarm, the function such as record of service data.However, these systems is compatible poor, the staircase of other brands can not be carried out
Monitoring, and more lay particular emphasis on the transmission of fault message rather than the detection of failure.Currently, set for the failed equipment of staircase
Counting main flow is realized using sensor and microprocessor.Such as《Fieldbus Based escalator data acquisition and monitoring
System》In propose a kind of escalator Monitoring System, its structure is as shown in Figure 1.The system is broken by detection step deletion, chain
The various safety switches 1 of chain, handrail fracture etc., staircase main control unit 2, multiple sub-controlling units 3 and each control of connection
The communication bus 4 of device processed is formed；Wherein, after one group of contact series of each safety switch 1 with the phase of staircase main controller device 2
Even, the disconnection of any safety switch can cause the power supply of escalator driving device to disconnect；Another group of contact of each safety switch 1
It is connected with a corresponding sub-controlling unit 3, the state of each safety switch is detected using servicing unit；It is each auxiliary
Help control device 3 to be connected by fieldbus 4 with staircase main control unit 2, carry out the communication of data.Each sub-controlling unit
3 are separately mounted in the upper, middle and lower region of staircase and girder.The system can carry out comprehensive to the running status of staircase
Monitoring, can more accurately provide the trouble point of staircase, but the number of cable installed additional is numerous, and journey is coupled in itself with staircase
Degree is higher, and installation difficulty is big.
In addition, the research in terms of current staircase security system all concentrates on the monitoring of failure, and almost without the pre- police
The research in face.If hidden danger present in staircase operation can timely be found, passenger is reminded, then can substantially reduce accident hair
Raw probability.
The content of the invention
The purpose of the present invention be for staircase fault detection system installation difficulty, with the staircase degree of coupling is higher to advise greatly
Mould is promoted, and the problem of can not carry out early warning to failure, proposes the malfunction monitoring and prior-warning device of a kind of staircase, present invention tool
There is the advantages of simple in construction, easy for installation, versatility and expansion are strong.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of staircase malfunction monitoring and prior-warning device, it is characterised in that the device is realized by two pieces of PCBs；The
One PCB is installed on by staircase motor, and current signal Acquisition Circuit, voltage are provided with first PCB
Signal acquisition circuit, safety switch signal acquisition circuit, master computing module and communication module；Second PCB, which is installed on, helps
On terraced motor bearing, vibration signals collecting circuit is provided with second PCB；Wherein, the master computing module
With the current signal Acquisition Circuit, voltage signal acquisition circuit, safety switch signal acquisition circuit and vibration signals collecting electricity
Road is connected, for obtaining the current and voltage signals of motor in staircase running, vibration signal and for detecting ladder
Level missing, pedal fracture, the safety switch signal of handrail fracture；The master computing module is connected with the communication module,
Communicated by the communication module with advertising integrated machine.
Alternatively, the voltage signal acquisition circuit includes more line structure identical voltage signal acquisition sub-circuits and one
Road sample frequency control circuit, each voltage signal acquisition sub-circuit include voltage transformer and pretreatment and modulate circuit, institute
Sample frequency control circuit is stated to be sequentially connected and formed by hysteresis comparison circuit and second adder circuit；Each voltage signal acquisition
In circuit, voltage transformer primary side is connected by a current-limiting resistance with staircase motor three-phase voltage input, the voltage
Transformer secondary with it is described pretreatment and modulate circuit input be connected, only all the way the pretreatment of voltage signal acquisition sub-circuit and
Modulate circuit output end passes sequentially through hysteresis comparison circuit and second adder circuit and the institute of the sample frequency control circuit
State master computing module connection, the pretreatment of remaining voltage signal acquisition sub-circuit and modulate circuit output end directly with the analytic accounting
Calculate module connection；The pretreatment and modulate circuit are used to be converted to the current signal of input that master computing module can be directly inputted
Voltage signal.
Alternatively, the current signal Acquisition Circuit includes more line structure identical current signals collection sub-circuit, each electricity
Stream signal acquisition sub-circuit includes current transformer, pretreatment and modulate circuit；Wherein, current transformer primary side is driven with staircase
Dynamic motor three-phase current input connection, the current transformer secondary are connected with pretreatment and modulate circuit input, pre-processed
And modulate circuit output end is directly connected with the master computing module；The pretreatment and modulate circuit are used for the electric current of input
Signal is converted to the voltage signal that can directly input master computing module.
Alternatively, the vibration signals collecting circuit includes digital accelerometer, the microcontroller and its most being sequentially connected
Mini system circuit and communication interface；Wherein, the microcontroller passes through spi bus or I2C buses accelerate with the data
Degree meter connection, receives the motor vibration signal that the data accelerometer measures；The microcontroller and the communication interface phase
Connection, the master computing module is sent to by vibration signal by the communication interface.
Alternatively, the safety switch signal acquisition circuit is made up of multiple safety switches and protection circuit, each safety open
The normally-closed contact of pass is connected in series with the protection circuit, and each safety switch signal after the protection circuit by transmitting to analytic accounting
Calculate module；The protection circuit is used for the various interference that prevent from carrying in on-off model, overvoltage directly inputs host computer mould
Block damages to caused by the master computing module.
Alternatively, the master computing module includes：
Microcontroller and its minimum system circuit, the microcontroller is interior to be provided with analog-digital converter；The analog-digital converter inputs
Each pretreatment with electric current and voltage signal acquisition circuit and modulate circuit output end is held to be connected, for preprocessed and conditioning
Voltage signal after processing of circuit is sampled, and the analog signal of acquisition is converted into data signal；Microcontroller input
Sample frequency control circuit output end with voltage signal acquisition circuit, the microcontroller of motor oscillating signal acquisition circuit respectively
Output end and the connection of the protection circuit output end of safety switch signal acquisition circuit, are respectively used to by calculating actual voltage
Frequency is controlled to the sample frequency of analog-digital converter, receives vibration signal and receive on-off model；
Peripheral storage, it is connected with the microcontroller, for storing the Current Voltage numeral obtained by the microcontroller
Signal, vibration signal and on-off model；The peripheral storage includes SPI Flash, SDRAM and SD card；
Power management chip, it is phase for being ± 12V, 5V, 3.3V, 1.5V voltage by the 12-36V voltage conversions of input
Component is answered to power.
The features of the present invention and beneficial effect：
The present invention proposes a kind of malfunction monitoring and prior-warning device of staircase, and the running status of the key position of staircase is carried out
Monitoring in real time and analysis, scent a hidden danger or during failure in time by host computer reminding passengers, can reduce the safe thing of staircase
Therefore the probability occurred, the loss that brings of staircase security incident is reduced, has that simple in construction, cost is low, installation is simple, versatile
The characteristics of, not only the running status of staircase is monitored to judge whether failure, moreover it is possible to pass through the signal to collecting
Analyzed to judge whether hidden danger, provide passenger to take suggestion, there is very strong practicality.
Brief description of the drawings
Fig. 1 is a kind of existing escalator Monitoring System structure chart；
Fig. 2 is the apparatus module structure chart of the present invention；
Fig. 3 is the signal acquisition module structure chart of the present invention；
Fig. 4 is the current and voltage signals Acquisition Circuit schematic diagram of the present invention；
Fig. 5 is apparatus of the present invention and external connection schematic diagram；
Fig. 6 is the workflow diagram of the present invention.
Embodiment
Staircase malfunction monitoring and prior-warning device combination accompanying drawing proposed by the present invention and one embodiment describe in detail as follows：
Signal in a kind of staircase malfunction monitoring and prior-warning device collection staircase running proposed by the present invention is deposited
Storage and analysis, warning information and fault message are included on the advertising integrated machine installed in staircase porch, provide passenger with
Take suggestion.The staircase malfunction monitoring of the embodiment of the present invention and the structure of prior-warning device are as shown in Fig. 2 the device passes through two pieces
PCB is realized；First PCB is installed on by staircase motor, and electric current letter is provided with first PCB
Number Acquisition Circuit, voltage signal acquisition circuit, safety switch signal acquisition circuit, master computing module and communication module；2nd PCB
Circuit board is installed on staircase motor bearing, and vibration signals collecting circuit is provided with (hereinafter referred to as in second PCB
For vibration acquisition daughter board)；Current signal Acquisition Circuit, voltage signal acquisition circuit, safety switch signal acquisition circuit and shake
Dynamic signal acquisition circuit collectively forms signal acquisition module；Wherein, the master computing module and the current signal Acquisition Circuit,
Voltage signal acquisition circuit, safety switch signal acquisition circuit and vibration signals collecting circuit are connected, for obtaining staircase fortune
Current and voltage signals of motor during row, vibration signal and for detecting step deletion, pedal fracture, handrail break
The safety switch signal split；The master computing module is connected with the communication module, passes through the communication module and advertising integrated
Machine is communicated.
The structure of signal acquisition module is as shown in Figure 3, and signal acquisition module includes electric current and voltage signal acquisition circuit, shaken
Dynamic signal acquisition circuit and safety switch signal acquisition circuit, the motor for being respectively used to gather in staircase running
Three-phase alternating current voltage signal, vibration signal and the safety for detecting step deletion, pedal fracture, handrail fracture etc.
Switching signal.
The voltage signal acquisition circuit of the present embodiment includes three line structure identical voltage signal acquisition sub-circuits and one
Road sample frequency control circuit, three tunnel voltage signal acquisition sub-circuits include voltage transformer and pretreatment and modulate circuit,
Sample frequency control circuit is sequentially connected and formed by hysteresis comparison circuit and second adder circuit；Each voltage signal acquisition electricity
Lu Zhong, voltage transformer primary side are connected by a current-limiting resistance (R1) with staircase motor three-phase voltage input, the electricity
Pressure transformer secondary is connected with the pretreatment and modulate circuit input, the only pretreatment of voltage signal acquisition sub-circuit all the way
And modulate circuit output end pass sequentially through the sample frequency control circuit hysteresis comparison circuit and second adder circuit with
Master computing module connection (because each voltage signal acquisition sub-circuit structure is identical, therefore need to only measure wherein that voltage is believed all the way
Number collection sub-circuit current/voltage signal frequency), the pretreatment of remaining voltage signal acquisition sub-circuit and modulate circuit are defeated
Go out end to be directly connected with the master computing module；The pretreatment and modulate circuit can for the current signal of input to be converted to
Directly input the voltage signal of master computing module.
The current signal Acquisition Circuit of the present embodiment includes three line structure identical current signals collection sub-circuit, each electric current
Signal acquisition sub-circuit includes current transformer, pretreatment and modulate circuit；Wherein, current transformer primary side drives with staircase
Motor three-phase current input connects, and the current transformer secondary is connected with pretreatment and modulate circuit input, pre-process and
Modulate circuit output end is directly connected with the master computing module.
Now illustrated by taking the collection of voltage signal all the way as an example, composition such as Fig. 4 of the road voltage signal acquisition sub-circuit
It is shown, including a voltage transformer S1, as two reversal connection parallel diodes (D1 and D2) of pretreatment and modulate circuit, electricity
Stream/voltage conversion circuit and first adder circuit, the road voltage signal acquisition sub-circuit connect with sample frequency control circuit
Connect；The current/voltage converter circuit of the present embodiment includes the first electric capacity C1 (capacitance is 200pF in the present embodiment), the first fortune
Calculate amplifier AMP1 and three branch being connected in parallel between the first operational amplifier A MP1 negative-phase inputs and output end
Road, tie point are provided with the second resistance R2 being connected in series (the present embodiment uses adjustable resistance, and resistance value is 0 Ω -100 Ω)
With 3rd resistor R3 (the present embodiment resistance value is 750 Ω), the second branch road is provided with the 4th resistance R4 (the present embodiment being connected in series
Using adjustable resistance, resistance value is 0 Ω -200K Ω) and the second electric capacity C2 (the present embodiment capacitance is 0.1 μ F), the 3rd branch road
Provided with the 3rd electric capacity C3 (the present embodiment capacitance is 0.01 μ F)；First, second adder circuit is conventional same phase
Adder circuit；Current limliting electricity is additionally provided between the primary side and staircase motor three-phase voltage input of the voltage transformer S1
Hinder R1 (the present embodiment resistance value is 110K Ω)；The annexation of each component is in the voltage signal acquisition sub-circuit：Voltage
The secondary of transformer is in parallel to access two reversal connection parallel diodes (D1 and D2) input with the first operational amplifier A MP1 afterwards
It is connected, first operational amplifier A MP1 positive input end grounding GND；First operational amplifier A MP1 output end and the
One electric capacity C1 one end is connected, the first electric capacity C1 other ends ground connection GND；Three branch roads, the first operational amplifier A MP1 and
The common port of first electric capacity C1 one end is as the output end U3 of current/voltage converter circuit and the input of first adder circuit
It is connected；The output end U4 of the first adder circuit is connected as the output end of pretreatment and modulate circuit with master computing module；
The input of the output end U3 connection hysteresis comparison circuits of current/voltage converter circuit in the road voltage signal acquisition sub-circuit
U5, the output end U6 of the hysteresis comparison circuit are connected with the input of second adder circuit, the second adder circuit
Output end U7 is connected as sample frequency control circuit output end with the master computing module；Remaining voltage signal acquisition sub-circuit
The output end U4 of middle first adder circuit as the output end of corresponding pretreatment and modulate circuit directly with master computing module phase
Even.
Current signal Acquisition Circuit is roughly the same with the collection of voltage signal used by the present embodiment, and difference is, electricity
Stream signal acquisition circuit eliminates the resistance R1 and sample frequency control circuit of voltage transformer S1 primary sides, namely current signal is adopted
Current/voltage transformer after pretreatment and modulate circuit with master computing module by being directly connected in collector.
The operation principle of the current and voltage signals Acquisition Circuit is：Current/voltage transformer is by the three-phase of motor
Alternating current, voltage signal are converted to the current signal between 0-1A, afterwards by the current signal by pre-processing and nursing one's health electricity
Road, be converted to the voltage signal that can directly input master computing module.In the specific embodiment of the invention, the mutual induction of voltage of selection
Device is star lattice electronics SPT204A, and the voltage transformer is current mode voltage transformer, and input rated current is 2mA, and output is specified
Electric current is 2mA.The primary side resistance R1 of voltage transformer plays a part of current limliting, and the rated current of input is limited in into 2mA.Selection
Current transformer be star lattice electronics SCT220B, the current transformer is current mode current transformer, input rated current be
20A, output rated current are 2mA.The diode (D1 and D2) of two reversal connections plays a part of protecting operational amplifier.Voltage/
Current transformer secondary connects current/voltage converter circuit, and the current signal that voltage/current transformer exports is converted into voltage
Signal.Wherein, the second electric capacity C2 and the 4th resistance R4 plays a part of compensating phase shift, and the 3rd electric capacity C3 is small capacitances, is played anti-
The effect of vibration filter ripple, the value by adjusting feedback resistance R2, R3 can obtain needing the voltage output of scope.Of the invention specific
In embodiment, because the input voltage range of master computing module is 0-3.3V, therefore the output of current/voltage converter circuit is adjusted
Voltage range is -1.5V-+1.5V, and master computing module will be inputted after voltage high to 0-3V using adder circuit.Host computer mould
Root tuber can calculate the frequency of voltage signal according to the output of sample frequency control circuit, and the sampling to signal is controlled.
Vibration signals collecting circuit is completed by the vibration acquisition daughter board on motor bearings.Vibration acquisition
Plate is made up of digital accelerometer, MCU (microcontroller) and its minimum system circuit and communication interface being sequentially connected；Its
In, MCU passes through spi bus or I2C buses are connected with data accelerometer, are received it and are measured motor vibration signal；
MCU is connected with communication interface (the present embodiment uses RS485 communication interfaces), and vibration signal is passed through into the RS485 communication interfaces
It is sent to master computing module.MCU models STM32F103C8 in the present embodiment, digital acceleration device selection ADXL345.
Safety switch signal acquisition circuit is made up of the safety switch contact connected and protection circuit, safety switch it is normally closed
Contact is connected with protection circuit；Safety switch signal is transmitted to master computing module by protection circuit.The protection circuit is used
Master computing module is directly inputted to caused by the master computing module in the various interference that prevent from carrying in on-off model, overvoltage
Damage.The protection circuit includes current-limiting resistance, photoelectrical coupler and Schottky diode；Wherein, current-limiting resistance and photoelectricity coupling
The input series connection of clutch, for protecting photoelectrical coupler；The negative pole and photoelectrical coupler input of Schottky diode are just
Extremely it is connected, the positive pole of Schottky diode is connected with the negative pole of photoelectrical coupler input, for preventing input voltage mutation from damaging
The bad safety switch signal acquisition circuit.In the present embodiment, the resistance of current-limiting resistance is 500 Ω, Schottky diode
Model M1F60, photoelectrical coupler chip selection TLP521-4.
The function of communication module is to realize the communication of apparatus of the present invention and advertising integrated machine.Device and advertising integrated machine it is logical
Letter is selected wired or wirelessly according to the difference of usage scenario.When apparatus of the present invention and the distance of advertising integrated machine compared with
It is remote or in the case that wiring is more complicated, the mode of radio communication can be selected；When apparatus of the present invention and the distance of advertising integrated machine
, can be by the way of wire communication in the case of relatively near, wiring easily.The communication module include RS485, Ethernet, serial ports,
The communication interface of CAN, suitable communication mode can be selected according to actual conditions.
Master computing module includes：
MCU (microcontroller) chips and its minimum system circuit, MCU chip is interior to be provided with analog-digital converter (ADC)；ADC
(ADC input voltage range is 0-3.3V) input connects with the pretreatment in signal acquisition module and modulate circuit output end
Connect, for being sampled to the voltage signal after the processing of preprocessed and modulate circuit, and the analog signal of acquisition is converted into
Data signal；MCU inputs are adopted with the sample frequency control circuit output end in signal acquisition module, motor oscillating signal respectively
The MCU output ends of collector and the protection circuit output end connection of safety switch signal acquisition circuit, are respectively used to pass through meter
Actual electric voltage frequency is calculated to be controlled ADC sample frequency, receive vibration signal and receive on-off model；MCU pairs
The Current Voltage data signal collected is analyzed, and staircase motor power is calculated, if staircase motor is grown
Time be in heavy condition (heavy condition be motor operation power reach peak power 80% and more than) then carry out
Early warning, information is sent to advertising integrated machine by communication module, shows that corresponding warning information carries out boarding prompting to passenger；
MCU is analyzed the vibration signal collected, judges that staircase motor whether there is mechanical breakdown or hidden danger, if finding
Mechanical breakdown or hidden danger then send information by communication module to advertising integrated machine, show corresponding information；MCU is to collection
Each safety switch state signal is detected, if detecting, safety switch disconnects, by communication module to advertising integrated machine
Send information, fault message corresponding to display；
Peripheral storage, it is connected with MCU chip, for storing the Current Voltage data signal obtained by MCU chip, vibration
Signal and on-off model；The peripheral storage includes SPI Flash (Serial Peripheral Interface (SPI) flash storage), SDRAM
(synchronous DRAM) and SD card, each signal can be stored according to different demands in different memories；At this
In specific embodiment, the electric current collected in real time, voltage signal, vibration signal are stored in SPI Flash by master computing module
In；Master computing module is by data storage required during processing and analysis in SDRAM；Master computing module by early warning, therefore
Barrier and hidden danger information are stored in SD card in the form of a file；
It is ± 12V, 5V, 3.3V, 1.5V voltage that power management chip, which is used for the 12-36V voltage conversions of input, is this hair
The components such as MCU, operational amplifier in bright device are powered.In the present embodiment, input voltage 24V, it is by 24V voltage conversions
12V, 5V voltage selection chip model be TPS5410, by 5V voltage conversions be -12V voltages select chip model for
MAX775, by 5V voltage conversions be to 3.3V, 1.5V voltage selection chip model be AMS1117.
Fig. 5 is apparatus of the present invention and outside connection diagram.Staircase master controller PLC (programmable logic controller (PLC)) is right
The operation of staircase is controlled, and apparatus of the present invention only gather motor current and voltage signals, motor in staircase running
Vibration signal, the safety switch signal of easy break-down are analyzed, and difference is presented on advertising integrated machine according to the result of analysis
Information.Apparatus of the present invention are not joined directly together with staircase master controller PLC, the running status of staircase are not controlled, and only
The signal of key is acquired, realizes the loose coupling with staircase, therefore the laying of sensor can be greatly reduced.
Fig. 6 is the workflow diagram of apparatus of the present invention, mainly includes MCU and the basic configuration of peripheral hardware and initialization, signal
Collection and four storage, the analysis of signal, the display of result parts.
The configuration and initialization of MCU and peripheral hardware are carried out first, according to MCU chip and the databook pair of the component used
The peripheral hardwares such as ADC, serial ports, SD card, SDRAM, SPI Flash, digital accelerometer are configured and initialized；Normal configuration and just
After beginningization, master computing module starts the cycle over operation, and cyclic process is as follows：
(1) the MCU control signal acquisition modules in master computing module are sampled, the collection staircase driving of vibration acquisition daughter board
Vibration signal in motor operation is simultaneously sent to master computing module；
(2) each signal collected is stored in corresponding peripheral storage by master computing module, while to collection
Signal is analyzed：Whether the power that motor is calculated using voltage x current value judges staircase motor in heavily loaded shape for a long time
State, if so, then needing to carry out early warning, reminding passengers postpone boarding；It whether there is using analysis of vibration signal staircase motor
Mechanical breakdown or hidden danger；
(3) according to the result of analysis, master computing module judges whether to need early warning, to being out of order or hidden danger information；If need
Will, then message is sent to advertising integrated machine using communication module, corresponding warning information is included on screen；If need not,
Then perform step (4)；
(4) master computing module obtains the state of each safety switch, if each safety switch is in closure state, returns
Step (1) is returned to continue cycling through；If there is safety switch disconnection, fault message is included in advertising integrated machine using communication module
On, return to step (1) continues cycling through.
Claims (9)
1. a kind of staircase malfunction monitoring and prior-warning device, it is characterised in that the device is realized by two pieces of PCBs；First
PCB is installed on by staircase motor, and current signal Acquisition Circuit, voltage letter are provided with first PCB
Number Acquisition Circuit, safety switch signal acquisition circuit, master computing module and communication module；Second PCB is installed on staircase
On motor bearing, vibration signals collecting circuit is provided with second PCB；Wherein, the master computing module with
The current signal Acquisition Circuit, voltage signal acquisition circuit, safety switch signal acquisition circuit and vibration signals collecting circuit
It is connected, for obtaining the current and voltage signals of motor in staircase running, vibration signal and for detecting step
Missing, pedal fracture, the safety switch signal of handrail fracture；The master computing module is connected with the communication module, leads to
The communication module is crossed to be communicated with advertising integrated machine.
2. device according to claim 1, it is characterised in that it is identical that the voltage signal acquisition circuit includes more line structures
Voltage signal acquisition sub-circuit and sample frequency control circuit all the way, it is mutual that each voltage signal acquisition sub-circuit includes voltage
Sensor and pretreatment and modulate circuit, the sample frequency control circuit by hysteresis comparison circuit and second adder circuit successively
Connect and compose；In each voltage signal acquisition sub-circuit, voltage transformer primary side passes through a current-limiting resistance and staircase motor
Three-phase voltage input is connected, and the voltage transformer secondary is connected with the pretreatment and modulate circuit input, only electric all the way
The pretreatment of signal acquisition sub-circuit and modulate circuit output end is pressed to pass sequentially through the hysteresis ratio of the sample frequency control circuit
It is connected compared with circuit and second adder circuit with the master computing module, the pretreatment of remaining voltage signal acquisition sub-circuit and tune
Reason circuit output end is directly connected with the master computing module；The pretreatment and modulate circuit are used for the current signal of input
The voltage signal of master computing module can be directly inputted by being converted to.
3. device according to claim 1, it is characterised in that it is identical that the current signal Acquisition Circuit includes more line structures
Current signal collection sub-circuit, each current signal collection sub-circuit includes current transformer, pretreatment and modulate circuit；Its
In, current transformer primary side is connected with staircase motor three-phase current input, the current transformer secondary with pretreatment and
Modulate circuit input is connected, and pretreatment and modulate circuit output end are directly connected with the master computing module；The pretreatment
And modulate circuit is used to being converted to the current signal of input into the voltage signal that can directly input master computing module.
4. device according to claim 2, it is characterised in that the pretreatment and modulate circuit include two reversal connection parallel connections
Diode (D1 and D2), current/voltage converter circuit and first adder circuit；Wherein, the secondary of the voltage transformer is simultaneously
Couple after described two reversal connection parallel diodes (D1 and D2) by the current/voltage converter circuit and first adder electricity
Road connects.
5. device according to claim 3, it is characterised in that the pretreatment and modulate circuit include two reversal connection parallel connections
Diode (D1 and D2), current/voltage converter circuit and first adder circuit；Wherein, the secondary of the current transformer is simultaneously
Couple after described two reversal connection parallel diodes (D1 and D2) by the current/voltage converter circuit and first adder electricity
Road connects.
6. the device according to Claims 2 or 3, it is characterised in that the vibration signals collecting circuit includes being sequentially connected
Digital accelerometer, microcontroller and its minimum system circuit and communication interface；Wherein, the microcontroller passes through SPI
Bus or I2C buses are connected with the data accelerometer, receive the motor vibration letter that the data accelerometer measures
Number；The microcontroller is connected with the communication interface, and vibration signal is sent into the host computer mould by the communication interface
Block.
7. device according to claim 6, it is characterised in that the safety switch signal acquisition circuit is by multiple safety opens
Close and protection circuit is formed, the normally-closed contact of each safety switch is connected in series with the protection circuit, and each safety switch signal leads to
Transmitted after crossing the protection circuit to master computing module；The protection circuit is used to preventing from carrying in on-off model various dry
Disturb, overvoltage directly inputs master computing module and damaged to caused by the master computing module.
8. device according to claim 7, it is characterised in that the master computing module includes：
Microcontroller and its minimum system circuit, the microcontroller is interior to be provided with analog-digital converter；The analog-digital converter input with
Each pretreatment of electric current and voltage signal acquisition circuit and modulate circuit output end connect, for preprocessed and modulate circuit
Voltage signal after processing is sampled, and the analog signal of acquisition is converted into data signal；Microcontroller input is distinguished
The microcontroller output at sample frequency control circuit output end, motor oscillating signal acquisition circuit with voltage signal acquisition circuit
The connection of the protection circuit output end of end and safety switch signal acquisition circuit, is respectively used to by calculating actual electric voltage frequency
The sample frequency of analog-digital converter is controlled, vibration signal is received and receives on-off model；
Peripheral storage, be connected with the microcontroller, for store obtained by the microcontroller Current Voltage data signal,
Vibration signal and on-off model；The peripheral storage includes SPI Flash, SDRAM and SD card；
Power management chip, for being ± 12V, 5V, 3.3V, 1.5V voltage by the 12-36V voltage conversions of input, for corresponding member
Device is powered.
9. device according to claim 8, it is characterised in that microcontroller in the master computing module is to collecting
Current Voltage data signal is analyzed, and staircase motor power is calculated, if staircase motor is in for a long time
Heavy condition then carries out early warning, sends information to advertising integrated machine by the communication module, shows corresponding warning information pair
Passenger carries out boarding prompting；The microcontroller is analyzed the vibration signal collected, judges whether staircase motor is deposited
In mechanical breakdown or hidden danger, information is sent to advertising integrated machine by communication module if mechanical breakdown or hidden danger is found, shown
Show corresponding information；The microcontroller detects to each safety switch state signal of collection, if detecting safety open
Shut-off is opened, then sends information, fault message corresponding to display to advertising integrated machine by communication module.
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| CN201710871405.6A CN107651550B (en) | 2017-09-25 | 2017-09-25 | A kind of staircase malfunction monitoring and prior-warning device |
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| CN201710871405.6A CN107651550B (en) | 2017-09-25 | 2017-09-25 | A kind of staircase malfunction monitoring and prior-warning device |
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| CN107651550A true CN107651550A (en) | 2018-02-02 |
| CN107651550B CN107651550B (en) | 2019-11-08 |
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| CN107651550B (en) | 2019-11-08 |
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