CA2953182A1 - Method for determining the state of access control devices and sales or payment machines of an access control system - Google Patents

Method for determining the state of access control devices and sales or payment machines of an access control system Download PDF

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Publication number
CA2953182A1
CA2953182A1 CA2953182A CA2953182A CA2953182A1 CA 2953182 A1 CA2953182 A1 CA 2953182A1 CA 2953182 A CA2953182 A CA 2953182A CA 2953182 A CA2953182 A CA 2953182A CA 2953182 A1 CA2953182 A1 CA 2953182A1
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CA
Canada
Prior art keywords
component
access control
sales
detected
identification signature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CA2953182A
Other languages
French (fr)
Inventor
Thomas SCHLECHTER
Thomas Buchegger
Clemens Hesch
Markus Pichler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Skidata AG
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Skidata AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP15203057.3 priority Critical
Priority to EP15203057.3A priority patent/EP3187872B1/en
Application filed by Skidata AG filed Critical Skidata AG
Publication of CA2953182A1 publication Critical patent/CA2953182A1/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00Payment architectures, schemes or protocols
    • G06Q20/08Payment architectures
    • G06Q20/20Point-of-sale [POS] network systems
    • G06Q20/206Point-of-sale [POS] network systems comprising security or operator identification provisions, e.g. password entry
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/14Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00Administration; Management
    • G06Q10/20Product repair or maintenance administration
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07FCOIN-FREED OR LIKE APPARATUS
    • G07F9/00Details other than those peculiar to special kinds or types of apparatus
    • G07F9/02Devices for alarm or indication, e.g. when empty; Advertising arrangements in coin-freed apparatus
    • G07F9/026Devices for alarm or indication, e.g. when empty; Advertising arrangements in coin-freed apparatus for alarm, monitoring and auditing in vending machines or means for indication, e.g. when empty
    • G10L17/005
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L17/00Speaker identification or verification
    • G10L17/04Training, enrolment or model building
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L17/00Speaker identification or verification
    • G10L17/06Decision making techniques; Pattern matching strategies
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L17/00Speaker identification or verification
    • G10L17/22Interactive procedures; Man-machine interfaces

Abstract

In the context of the method for determining the state of access control devices and sales or payment machines of an access control system, the sound profile in the audible or ultrasonic range emitted during operation by a component or component group of an access control device or a sales or payment machine of an access control system is detected permanently or in predetermined time intervals by at least one microphone, wherein on the basis of the recorded sound profile, an acoustic identification signature is created in a server or central computer, which identification signature is based on the frequency spectrum of the recorded sound profile and/or the temporal change thereof, wherein the acoustic identification signature is compared with an acoustic reference identification signature which is stored in the server and assigned to this component or component group, and wherein in the event of the detection of a deviation of the detected acoustic identification signature from the acoustic reference identification signature stored in the server, which deviation exceeds a predetermined first threshold value, increased wear of the component or the component group is detected, wherein if the deviation of the detected acoustic identification signature from the acoustic reference identification signature stored in the server exceeds a second threshold value, a defect of the component or the component group is detected.

Description

METHOD FOR DETERMINING THE STATE OF ACCESS CONTROL DEVICES
AND SALES OR PAYMENT MACHINES OF AN ACCESS CONTROL SYSTEM
The present invention relates to a method for determining the state of access control devices and sales or payment machines of an access control system according to the preamble of Patent Claim 1.
An access control system for vehicles or people generally comprises a plurality of access control devices, which have a reading unit for reading the data required for checking the validity of an access authorization and a blocking device, which is actuated by an actuator controlled by a control in order to allow a person or a vehicle to enter or to leave a building or a site. Furthermore, access control systems comprise sales machines for the access authorizations and/or payment machines for paying the fee for the use of the access control system. Payment machines are generally provided in the case of access control devices for motor vehicles, for example in multi-storey car parks.
In addition to electronic components, the above-mentioned access control devices or sales or payment machines of an access control system also comprise a plurality of mechanical components, such as for example blocking devices, which are transferred from a blocking position into a released position upon reading a valid access authorization, or coin return modules comprising conveyor belts for transporting the coins used as change, banknote input and output modules, ticket or credit card infeed modules, printer modules for access authorizations or electric motors for driving the components which can be actuated mechanically. Furthermore, fans are provided for dissipating the heat created during operation of the components.
- 2 -For the access control devices or sales or payment machines of an access control system, predetermined maintenance intervals are generally prescribed in order to prevent a failure during operation. Nonetheless, individual components of these devices may be exposed to higher loading than expected, which may lead in a disadvantageous manner to increased wear and as a next step, to a failure of these components between two regular maintenance dates.
Furthermore, on a case-by-case basis a fixed maintenance interval may be extended or adjusted to real-life conditions if lower wear than usual is present. Furthermore, maintenance-free access control devices or sales or payment machines of access control systems are known from the prior art, so that a timely detection of defects or increased wear is of particular importance for the operation of the access control system.
The present invention is based on the object of specifying a method for determining the state of access control devices and sales or payment machines of an access control system, the carrying out of which method means that wear of components, which may lead to a failure of the components, is detected in a timely manner. Furthermore, it should also be possible to determine by means of the method according to the invention, in the case of failure of an access control device or a sales or payment machine of an access control system, which component has a defect; vandalism attempts should additionally be detected.
This object is achieved by means of the features of Patent Claim 1. Further embodiments and advantages according to the invention emerge from the dependent claims.
- 3 -Accordingly, a method for determining the state of access control devices and sales or payment machines of an access control system is suggested, in the context of which the sound profile in the audible or ultrasonic range emitted during operation by a component or component group of an access control device or a sales or payment machine of an access control system is detected permanently or in predetermined time intervals by at least one microphone and on the basis of the recorded sound profile, an acoustic identification signature is created in a server or central computer, which identification signature is based on the frequency spectrum of the recorded sound profile and/or the temporal change thereof, wherein the acoustic identification signature is assigned to a component or component group and is compared with an acoustic reference identification signature which is stored in the server and assigned to this component or component group, and wherein in the event of the detection of a deviation of the detected acoustic identification signature from the acoustic reference identification signature stored in the server, which deviation exceeds a predetermined first threshold value, increased wear of the component or the component group is detected, wherein if the deviation of the detected acoustic identification signature from the acoustic reference identification signature stored in the server exceeds a second threshold value, which is higher than the first threshold value, a defect of the component or the component group is detected.
The at least one microphone can be arranged inside or outside an access control device or a sales or payment machine of an access control system. In the example shown in the figure, a payment machine 1, an access control device 2 for vehicles and an access control device 3 for vehicles realized as a
- 4 -turnstile are illustrated, wherein at least one microphone 4 is arranged inside these devices in each case. A server in which an acoustic identification signature is created on the basis of the recorded sound profile is provided with the reference number 5 in the figure.
The predetermined intervals of detection of the sound profile emitted during operation are chosen in such a manner that the sounds emitted by all components or component groups during operation are detected.
The assignment of a detected identification signature to a component or component group takes place according to an embodiment of the invention on the basis of characteristic properties of the sound profile emitted by the component or component group.
Alternatively, the assignment of a detected identification signature to a component or component group can take place in that, on the basis of the known precise sequence of the individual operations during the operation of an access control device or a sales or payment machine of an access control system, the detected identification signature is uniquely assigned to one operation and therefore one component or one component group, wherein the start of operation of the access control device or the sales or payment machine is detected on the basis of the signals delivered by at least one microphone.
In the context of a development of the invention, the access control devices and sales or payment machines of an access control system are connected to the server for the purpose of data communication, wherein the information about which component or component group is active is transmitted to the ,
- 5 -server in real time, so that the assignment of a detected identification signature to a component or component group takes place in this manner.
It may optionally be provided that in the event of detection of a deviation of the detected acoustic identification signature from the acoustic reference identification signature stored in the server, which deviation exceeds the predetermined first threshold value, increased wear of the component or the component group is detected, and that if the deviation of the detected acoustic identification signature from the acoustic reference identification signature stored in the server exceeds the second threshold value, a defect of the component or the component group is detected if the respective threshold values are always exceeded for a predetermined time interval.
An acoustic identification signature can be calculated from the recorded sound profile or measured signal by means of the following steps for example:
1. Division of the measured signal into N successive part blocks;
2. for all N part blocks of the signal:
a. Subtraction of the mean value (zero-mean adjustment);
b. Fast Fourier transform (FFT) of the signal;
c. Normalization by division by the sum of the absolute values of the spectral values;
3. Calculation of the average spectrum of all N spectra of the part blocks; and 4. Moving average smoothing of the average spectrum in the frequency range.
- 6 -An acoustic identification signature can for example be compared with the acoustic reference identification signature stored in the server in that the pointwise differences in the frequency spectrum are added up in order to obtain a deviation measure. The reference identification signature of a component or a component group corresponds to the acoustic identification signature of this component or component group in a defect-free state with very low or without wear.
Alternatively, the creation of an acoustic identification signature from the recorded sound profile or measured signal may be based on the extraction and subsequent selection of a defined set of signal properties. Properties which come into question for this are e.g. properties from the time range, such as for example the energy content of the signal within a short defined time window (short-term energy), spectral properties, such as e.g. the spectral centre of gravity of the signal (spectral centroid) or the current spread around a frequency range (spectral spread), band energies, wherein the spectrum is divided into defined frequency bands, within which the available energy of the signal is calculated and what are known as Mel frequency cepstral coefficients (MFCC
coefficients), which are known from speech recognition and lead to a compact representation of the frequency spectrum.
The calculation of these coefficients is described comprehensively in the literature and is well-known for the person skilled in the art.
Subsequently, an investigation is carried out into which of the obtained above-described properties contribute least to the clear delimitation of the reference data of the signal.
In addition, an investigation is carried out into how well the current set of signal properties allows a differentiation of individual recorded signals or sound profiles, wherein in ,
- 7 -a next step, the least relevant property is removed from observation. The above steps are subsequently carried out anew until ultimately at one point, instead of an improvement of the result there is a deterioration of the result. At this point, all superfluous properties have then been eliminated.
Although further thinning out would further reduce the overall complexity, it would also not optimally utilize the performance of the system. As a result, a set of signal properties is created which is optimal for a predetermined area of application, in the present case for the identification signatures of access control devices and sales or payment machines of an access control system, and does not have to be derived anew again in subsequent steps.
An acoustic identification signature can for example here be compared with the acoustic reference identification signature stored in the server in that the pointwise differences of the signal properties of the set of signal properties, which is optimal for a predetermined area of application, are added up in order to obtain a deviation measure.
In the context of a learning phase, the usual sounds during operation of an intact access control device or a sales or payment machine of an access control system are recorded by the at least one microphone, wherein in this manner, the recorded sound signals are in each case assigned uniquely to one operation and thus one component or one component group, which is involved in the operation, in the server, taking account of the known precise sequence of the individual operations of the access control device or the sales or payment machine, and wherein acoustic reference identification signatures for the components or component groups are created from the recorded sound signals and stored in the server. If for example according to the workflow in a , , ,
- 8 -payment machine, coin insertion in particular is active, the recorded signals are to be assigned to the components active during coin insertion, such as the coin slot lock, coin validation, etc. If according to the workflow, a card, for example a credit card is fed in, then the sound signals are assigned to the components of the card infeed. The beginning of the operation of the access control device or the sales or payment machine is detected on the basis of the signals delivered by at least one microphone, so that whilst taking account of the known precise sequence of the individual operations after the beginning of operation, the assignment of the recorded sound signals and thus the reference identification signatures to the components or component groups takes place.
If the access control devices and sales or payment machines of an access control system are connected to the server for the purpose of data communication and the information about which component or component group is active is transmitted to the server in real time, the learning phase takes place in that the usual sounds during operation of an intact access control device or a sales or payment machine of an access control system are recorded by the at least one microphone, which sounds are assigned in the server to the currently active component or component group in each case;
subsequently the corresponding reference identification signature is created in the server.
Furthermore, according to a development of the invention, conventional ambient sounds are also recorded and stored as standard background noise.
If a few components of the machine are always only activated simultaneously with other components as a component group, it ,
- 9 -can first be detected according to the method that at least one component of this component group is defective.
In order to increase the accuracy of the method, at least one microphone can be assigned to each component, which microphone is arranged in the interior of the access control device or the sales or payment machine of an access control system, e.g. in a sales machine, or externally. In this case, the assignment of a detected identification signature to a component can take place in that the underlying sound profile recorded by a microphone is assigned to the component to which the microphone is assigned.
In the context of a development of the invention, in addition to an acoustic reference identification signature for a component or a component group, identification signatures are stored in the server, which in each case correspond to an actual defect of a component or a component group. In this manner, an identification signature not corresponding to the reference identification signature can, in the case of adequate matching with an identification signature assigned to an actual defect of a component or a component group, be assigned to the respective defect of a component or a component group, so that directly suitable measures can be introduced directly. For example, a specialized technician can inspect the device on site in a targeted manner and, if necessary, replace components. These signatures are added to the data record assigned to a component or a component group when the actual defects are occurring for the first time.
An adequate match is present if the deviation of the detected acoustic identification signature from the acoustic identification signature stored in the server falls below a third predetermined threshold value.
- 10 -According to the invention, in the case of detected identification signatures, which correspond neither to the reference identification signature nor to an identification signature assigned to a defect of a component or a component group, these identification signatures are stored in the server as new identification signatures, which correspond to a not yet classified or categorized defect, wherein the classification or categorization then takes place when the defect has been identified.
It is possible by means of the concept according to the invention to detect in a timely manner whether a component should be replaced or whether an unscheduled lubrication is required, etc.
In the context of a further embodiment of the invention, in the event of a detected identification signature, which cannot be assigned to a component or component group or the deviation of which exceeds the second threshold value of all acoustic reference identification signatures and cannot correspond to a defect of a component or component group, which can be determined for example on the basis of intensity and point of origin, a vandalism attempt or application of force may be detected.
Analogously, strong rain or strong wind can be detected on the basis of a detected identification signature, which may necessitate a temporary deactivation of a device in order to prevent damage. For this purpose, reference signatures are stored in the server, which correspond to strong rain or strong wind.

= CA 02953182 2016-12-29
- 11 -For example, an access control device for vehicles comprising a barrier boom can be deactivated in the event of the detection of an identification signature, which corresponds to strong wind, in order to prevent damage to the arriving vehicles due to the wind. Furthermore, in the event of the detection of strong rain, sensitive components, for example the ticket infeed of a payment machine, can be covered by means of a suitable device in order to prevent damage due to the rain.

Claims (9)

1. A method for determining the state of access control devices and sales or payment machines of an access control system, characterized in that the sound profile in the audible or ultrasonic range emitted during operation by a component or component group of an access control device or a sales or payment machine of an access control system is detected permanently or in predetermined time intervals by at least one microphone and on the basis of the recorded sound profile, an acoustic identification signature is created in a server or central computer, which identification signature is based on the frequency spectrum of the recorded sound profile and/or the temporal change thereof, wherein the acoustic identification signature is assigned to a component or component group and is compared with an acoustic reference identification signature which is stored in the server and assigned to this component or component group, and wherein in the event of the detection of a deviation of the detected acoustic identification signature from the acoustic reference identification signature stored in the server, which deviation exceeds a predetermined first threshold value, increased wear of the component or the component group is detected, wherein if the deviation of the detected acoustic identification signature from the acoustic reference identification signature stored in the server exceeds a second threshold value, which is higher than the first threshold value, a defect of the component or the component group is detected.
2. The method for determining the state of access control devices and sales or payment machines of an access control system according to Claim 1, characterized in that in the context of a learning phase, the usual sounds during operation of an intact access control device or an intact sales or payment machine of an access control system are recorded by the at least one microphone, wherein the recorded sound signals are in each case assigned to one component or one component group, and wherein acoustic reference identification signatures for the components or component groups are created from the recorded sound signals and stored in the server, wherein the assignment of the recorded sound signals and thus the reference identification signatures to the components or component groups takes place in that the beginning of the operation of the access control device or the sales or the payment machine is detected on the basis of the signals delivered by at least one microphone, wherein, taking account of the known precise sequence of the individual operations of the access control device or a sales or payment machine, the recorded sound signals are in each case assigned uniquely to one operation and thus one component or one component group, or takes place in that the access control devices and sales or payment machines of the access control system are connected to the server for the purpose of data communication and the information about which component or component group is active is transmitted to the server in real time, so that the recorded sound signals are assigned in the server to the currently active component or component group in each case.
3. The method for determining the state of access control devices and sales or payment machines of an access control system according to Claim 1 or 2, characterized in that in addition to an acoustic reference identification signature for a component or a component group, identification signatures are stored in the server, which in each case correspond to an actual defect of a component or a component group, wherein an identification signature not corresponding to the reference identification signature can, in the case of adequate matching with an identification signature corresponding to an actual defect of a component or a component group, be assigned to the respective defect of a component or a component group directly.
4. The method for determining the state of access control devices and sales or payment machines of an access control system according to Claim 3, characterized in that, in the case of detected identification signatures, which correspond neither to the reference identification signature nor to an identification signature assigned to a defect of a component or a component group, these identification signatures are stored in the server as new identification signatures, which correspond to a not yet classified or categorized defect, wherein the classification or categorization then takes place when the defect has been identified.
5. The method for determining the state of access control devices and sales or payment machines of an access control system according to one of the preceding claims, characterized in that, in the event of a detected identification signature, which cannot be assigned to a component or component group or the deviation of which exceeds the second threshold value of all acoustic reference identification signatures and cannot correspond to a defect of a component or component group, a vandalism attempt or application of force may be detected.
6. The method for determining the state of access control devices and sales or payment machines of an access control system according to one of the preceding claims, characterized in that reference signatures are stored in the server, which correspond to strong rain or strong wind, wherein if strong rain or strong wind are detected on the basis of a detected identification signature, a temporary deactivation of a device is induced in order to prevent damage.
7. The method for determining the state of access control devices and sales or payment machines of an access control system according to one of the preceding claims, characterized in that the assignment of a detected identification signature to a component or component group takes place on the basis of characteristic properties of the sound profile emitted by the component or component group.
8. The method for determining the state of access control devices and sales or payment machines of an access control system according to one of the preceding Claims 1-6, characterized in that the assignment of a detected identification signature to a component or component group takes place in that, on the basis of the known precise sequence of the individual operations during the operation of an access control device or a sales or payment machine of an access control system, the detected identification signature is uniquely assigned to one operation and therefore one component or one component group, wherein the start of operation of the access control device or the sales or payment machine is detected on the basis of the signals delivered by at least one microphone.
9. The method for determining the state of access control devices and sales or payment machines of an access control system according to one of the preceding Claims 1-6, characterized in that the access control devices and sales or payment machines are connected to the server for the purpose of data communication, wherein the information about which component or component group is active is transmitted to the server in real time, so that the assignment of a detected identification signature to a component or component group takes place in this manner.
CA2953182A 2015-12-30 2016-12-29 Method for determining the state of access control devices and sales or payment machines of an access control system Pending CA2953182A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15203057.3 2015-12-30
EP15203057.3A EP3187872B1 (en) 2015-12-30 2015-12-30 Method for determining the condition of access control devices and sales or payment machines of an access control system

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EP (1) EP3187872B1 (en)
AU (1) AU2016269526B2 (en)
CA (1) CA2953182A1 (en)

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EP3187872B1 (en) * 2015-12-30 2018-11-28 Skidata Ag Method for determining the condition of access control devices and sales or payment machines of an access control system

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US20170193482A1 (en) 2017-07-06
EP3187872B1 (en) 2018-11-28
EP3187872A1 (en) 2017-07-05
US10430773B2 (en) 2019-10-01
AU2016269526A1 (en) 2017-07-20
AU2016269526B2 (en) 2018-11-15

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