CN111998762B - Cabinet and method for detecting closing of cabinet door - Google Patents

Cabinet and method for detecting closing of cabinet door Download PDF

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Publication number
CN111998762B
CN111998762B CN202011175552.8A CN202011175552A CN111998762B CN 111998762 B CN111998762 B CN 111998762B CN 202011175552 A CN202011175552 A CN 202011175552A CN 111998762 B CN111998762 B CN 111998762B
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China
Prior art keywords
sensor
cabinet
cabinet door
distance
closing
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CN202011175552.8A
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Chinese (zh)
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CN111998762A (en
Inventor
李默
薛嘉林
王青
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Alipay Hangzhou Information Technology Co Ltd
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Alipay Hangzhou Information Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
    • E06B3/36—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement with a single vertical axis of rotation at one side of the opening, or swinging through the opening
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F11/00—Coin-freed apparatus for dispensing, or the like, discrete articles

Abstract

The application provides a cabinet and a method for detecting closing of a cabinet door. The cabinet comprises a cabinet body, a cabinet door, at least one sensing unit and a judging device. The cabinet includes an opening. The cabinet door can close the opening. Each of the at least one sensing unit includes: the device comprises a cabinet door, a measured object and a sensor, wherein the measured object is arranged on one of the cabinet door and the cabinet body, the sensor is arranged on the other of the cabinet door and the cabinet body and is configured to sense the distance change process of the measured object in the process that the cabinet door closes the opening and output a distance signal corresponding to the distance change process. The judging device is connected with the at least one sensor, receives the at least one distance signal and judges the opening and closing state of the cabinet door according to the characteristics of the distance change reflected by the at least one distance signal.

Description

Cabinet and method for detecting closing of cabinet door
Technical Field
The application relates to the technical field of intelligent retail, in particular to a cabinet and a method for detecting closing of a cabinet door.
Background
The existing unmanned sales counter mostly adopts an electric mortise lock. The existing electric mortise lock mostly uses a magnetic reed switch (i.e. a reed switch) to identify the open/close state of the door, thereby realizing the functions of door closing detection and automatic locking. Because the magnetic reed switch does not have any intelligence, a person cheating the lock can easily cheat the magnetic reed switch through a permanent magnet, and the electric mortise lock mistakenly thinks that the door is closed and then tries to lock. One area where there is a strong need for anti-fraud locks is the area of unmanned merchandising (e.g., unmanned containers), where after a successful fraud, the fraudulent person may not be perceived by the system and risk the theft, replacement, etc.
Disclosure of Invention
For solving the technical problem that the electric mortice lock is easily deceived in traditional unmanned sales counter, the application discloses a cupboard includes: a cabinet including an opening; a cabinet door capable of closing the opening; at least one sensing unit, each of the at least one sensing unit comprising: the device comprises a cabinet door, a measured object and a sensor, wherein the measured object is arranged on one of the cabinet door and the cabinet body, the sensor is arranged on the other of the cabinet door and the cabinet body, and the sensor is configured to sense the distance change process of the measured object in the process of closing the opening of the cabinet door and output a distance signal corresponding to the distance change process; and the judging device is connected with the at least one sensor, receives the at least one distance signal and judges the opening and closing state of the cabinet door according to the characteristics of the distance change reflected by the at least one distance signal.
In some embodiments, the object under test comprises a magnetic member and the sensor comprises a hall sensor.
In some embodiments, the cabinet door includes a first surface, the cabinet body includes a second surface, and the second surface overlaps the first surface when the cabinet door closes the opening; and the object to be measured is mounted on one of the first surface and the second surface, and the sensor is mounted on the other of the first surface and the second surface.
In some embodiments, the at least one sensing unit comprises a first sensing unit, the object of the first sensing unit comprises a first object to be measured, the sensor of the first sensing unit comprises a first sensor, wherein: in the process that the cabinet door closes the opening, the first sensor senses the process of distance change between the first sensor and the first measured object and outputs a continuous first distance signal; and when the first surface is overlapped with the second surface, the first measured object and the first sensor are in a first position relation.
In some embodiments, during the closing of the opening by the cabinet door: the distance change characteristics of the first sensor and the first measured object comprise first reduction and then increase; and the first distance signal is increased and then decreased.
In some embodiments, the first sensor is mounted on the cabinet body, and the first object to be tested is mounted on the cabinet door; and the first positional relationship comprises: the first measured object is closer to the inner side of the cabinet body than the first sensor.
In some embodiments, the at least one sensing unit further comprises a second sensing unit, the object of the second sensing unit comprising a second object to be measured, the sensor of the second sensing unit comprising a second sensor, wherein: in the process that the cabinet door closes the opening, the second sensor senses the process of distance change between the second sensor and the second measured object and outputs a second distance signal; and when the first surface is overlapped with the second surface, the second measured object and the second sensor are in a second position relation, wherein the second position relation is different from the first position relation.
In some embodiments, during the closing of the opening by the cabinet door: the distance change characteristic of the second sensor and the second measured object comprises gradual reduction; and the second distance signal gradually increases.
In some embodiments, the second object to be tested is mounted on the cabinet door, and the second sensor is mounted on the cabinet body; and the second positional relationship comprises: the second measured object is closer to the outer side of the cabinet door than the second sensor.
In some embodiments, the determining the opening and closing state of the cabinet door according to the characteristic of the distance change reflected by the at least one distance signal includes: and judging the opening and closing state of the cabinet door according to the corresponding relation between the first distance signal and the second distance signal.
In some embodiments, the determining device determines the opening/closing state of the cabinet door according to the characteristic of the distance change reflected by the at least one distance signal, including: and the judging device determines that the at least one distance signal is matched with a preset signal mode, and further determines that the cabinet door is closed.
In some embodiments, the preset signal pattern is obtained by the determining device based on historical door closing data.
In some embodiments, the determining means determines that the at least one distance signal matches the predetermined signal pattern based on at least one of the following models: a hidden Markov model; a GMM model; observing a probability model; and RNN models.
The application also discloses a method for detecting the closing of the cabinet door, which is used for detecting the opening and closing state of the cabinet door, and comprises the following steps: receiving the at least one range signal; and determining that the at least one distance signal matches a preset signal pattern, and further determining that the cabinet door is closed.
In some embodiments, the preset signal pattern is obtained by the determining device based on historical door closing data.
In some embodiments, the predetermined signal pattern is associated with a location of installation of the at least one sensor and the at least one object under test on the cabinet.
In some embodiments, the determining that the at least one distance signal matches a preset signal pattern comprises: determining that the at least one distance signal matches the preset signal pattern based on at least one of a hidden Markov model, a GMM model, an observation probability model, and an RNN model.
This application cupboard utilizes the magnetic part of setting on the cabinet door and sets up the change of hall sensor relative position on the cabinet body at the in-process of closing the door, what gather is continuous analog signal, discerns through the mode to the analog signal who gathers, just can normally close the door process and cheat the lock process and distinguish, has increased the degree of difficulty of cheating the lock, has solved the technical problem that this application needs to be solved.
Drawings
Fig. 1 shows a schematic structural diagram of a cabinet provided according to an embodiment of the present application;
fig. 2 is a front view of a cabinet in a door-closed state according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating a hardware structure of a determining apparatus according to an embodiment of the present application;
FIG. 4A is a schematic diagram illustrating an installation location of a first object under test and a first sensor according to an embodiment of the present application;
FIG. 4B is a schematic diagram showing the positional relationship between the first object to be measured and the first sensor after the cabinet door in FIG. 4A is closed;
FIG. 4C is a schematic diagram illustrating an electrical signal (i.e., a first distance signal) detected by the first sensor during closing of the door when the first object under test and the first sensor are in the positional relationship of FIG. 4B;
FIG. 5A is a schematic diagram illustrating an installation location of a second object under test and a second sensor according to an embodiment of the present application;
FIG. 5B is a schematic diagram showing the relationship between the position of the second object and the second sensor after the door of FIG. 5A is closed;
FIG. 5C is a schematic diagram showing an electrical signal (i.e., a second distance signal) detected by the second sensor during closing of the door when the relative positions of the second object and the second sensor are shown in FIG. 5B;
FIG. 6A is a schematic diagram illustrating the installation positions of the object to be measured and the sensors in two sensing units on the cabinet according to the embodiment of the present application;
FIG. 6B is a schematic diagram showing the positional relationship between the first measured object and the first sensor, and the positional relationship between the second measured object and the second sensor after the cabinet door in FIG. 6A is closed; and
fig. 6C shows a schematic diagram of a relationship between the first distance signal of the first sensor and the second distance signal of the second sensor obtained by combining the first distance signal of the first sensor and the second distance signal of the second sensor.
Detailed Description
The following description is presented to enable any person skilled in the art to make and use the present disclosure, and is provided in the context of a particular application and its requirements. Various modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the present application. Thus, the present application is not limited to the embodiments shown, but is to be accorded the widest scope consistent with the claims.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting.
These and other features of the present application, as well as the operation and function of the related elements of structure and the combination of parts and economies of manufacture, may be significantly improved upon consideration of the following description. All of which form a part of this application, with reference to the accompanying drawings. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the application.
These and other features of the present application, as well as the operation and function of the related elements of the structure, and the economic efficiency of assembly and manufacture, are significantly improved by the following description. All of which form a part of this application with reference to the accompanying drawings. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the application. It should also be understood that the drawings are not drawn to scale.
The present application provides a cabinet. By way of example, the cabinet may include, but is not limited to, a container, a safe, and the like. By way of example, the cabinet may also be another object that functions similarly to the cabinet. For example, a house/building with doors and/or windows may also be considered as a cabinet, as an example. As an example, the container may comprise an unmanned sales container. For convenience of description, in the following description of the present application, the structure and function of each part of the cabinet described in the present application are described by taking an unmanned sales counter as an example.
Fig. 1 shows a schematic structural diagram of a cabinet 100 according to an embodiment of the present application. Specifically, the cabinet 100 may include a cabinet body 200 and a cabinet door 300.
The cabinet 200 may include a receiving cavity 210. The receiving cavity 210 may be used to receive goods. The receiving cavity 210 may include an opening 220. Goods can be put into the accommodating cavity 210 or taken out of the accommodating cavity 210 through the opening 220.
The cabinet door 300 may be plate-shaped. By way of example, the door 300 may include, but is not limited to, a side hung door, a sliding door, a folding door, a roller door, and the like. For convenience of description, in the following description of the present application, the structure and function of the cabinet door 300 are described by taking a side hung door as an example. In some embodiments, the number of cabinet doors 300 may be one. For example, the cabinet door 300 shown in fig. 1 is a single-door. In some embodiments, the number of the cabinet doors 300 may be plural. For example, the cabinet 100 may include two side-hung doors on the left and right. The cabinet door 300 may be coupled with the cabinet body 200. Taking a side hung door as an example, the cabinet door 300 and the cabinet body 200 may be connected together by hinges 110. The side 310 of the cabinet door 300 to which the hinge 110 is attached may be considered as a door hinge of the cabinet door 300. The cabinet door 300 may close the opening 220. For example, the door 300 can rotate around the door shaft 310 to close or open the opening 220 of the cabinet 200.
In some embodiments, the cabinet door 300 may include a first surface 320, and the cabinet 200 may include a second surface 230, the second surface 230 corresponding to the first surface 320. In some embodiments, the normal to the first surface 320l 1 And the normal to the second surface 230l 2 The directions are close or the same. For convenience of description, in the following description of the present application, the normal to the first surface 320 is takenl 1 And the normal to the second surface 230l 2 The directions are the same for description. When the cabinet door 300 closes the opening 220, the first surface 320 and the second surface 230 overlap. The overlapping means that the first surface 320 faces the second surface 230 in a direction along a normal line of the first surface 320 and the second surface 230. For example, as shown in fig. 1, the first surface 320 may be a surface of the top of the cabinet door 300. The second surface 230 may be a surface on the cabinet 200 corresponding to the first surface 320.
Normal linel 1 And normal linel 2 The direction of (a) may be any direction. For example, in some embodiments, the normal linel 1 And normal linel 2 May be oriented in the same direction as the axis of the door shaft 310 (e.g., fig. 1). As another example, in some embodiments, the normal linel 1 And normal linel 2 May be oriented perpendicular to the axis of the door shaft 310; for example, the first surface may be a surface 340 on the cabinet door 300, and the second surface may be a surface 240 on the cabinet body 200 corresponding to the surface 340.
Fig. 2 illustrates a front view of the cabinet 100 in a door-closed state according to an embodiment of the present application. In some embodiments, along the normall 1 And normal linel 2 In the direction of (a), the first surface 320 and the second surface 230 may be separated by a distance to ensure that the first surface 320 and the second surface 230 do not rub during the process of opening and closing the door. Of course, in some embodiments, the first surface 320 may also abut the second surface 230 without affecting the opening and closing of the door.
With continued reference to fig. 1, the cabinet 100 may further include a sensing unit 101 and a determination device 600.
As an example, fig. 3 shows a hardware structure diagram of a determining apparatus 600 provided according to an embodiment of the present application.
The decision-maker 600 includes at least one memory 630 and at least one processor 620. In some embodiments, the determination device 600 may further include a communication port 650 and an internal communication bus 610. Also, decision device 600 can include I/O component 660.
Internal communication bus 610 may connect various system components including memory 630 and processor 620.
I/O component 660 supports input/output between decision device 600 and other components.
The memory 630 may include a data storage device. The data storage device may be a non-transitory storage medium or a transitory storage medium. For example, the data storage device can include one or more of a disk 632, a Read Only Memory (ROM) 634, or a Random Access Memory (RAM) 636. The memory 630 also includes at least one instruction set stored in the data storage device. The set of instructions is computer program code that may include programs, routines, objects, components, data structures, procedures, modules, etc. that perform the methods for detecting closure of a cabinet door provided herein.
The communication port 650 is used for determining data communication between the apparatus 600 and the outside.
The at least one processor 620 communicates with the at least one memory 630 via an internal communication bus 610. The at least one processor 620 is configured to execute the at least one instruction set, and when the at least one processor 620 executes the at least one instruction set, the determining device 600 implements the method for detecting the closing of the cabinet door provided in the present application. Processor 620 may perform some or all of the steps involved in the method. The processor 620 may be in the form of one or more processors, and in some embodiments, the processor 620 may include one or more hardware processors, such as microcontrollers, microprocessors, Reduced Instruction Set Computers (RISC), Application Specific Integrated Circuits (ASICs), application specific instruction set processors (ASIPs), Central Processing Units (CPUs), Graphics Processing Units (GPUs), Physical Processing Units (PPUs), microcontroller units, Digital Signal Processors (DSPs), Field Programmable Gate Arrays (FPGAs), Advanced RISC Machines (ARMs), Programmable Logic Devices (PLDs), any circuit or processor capable of executing one or more functions, or the like, or any combination thereof. For illustrative purposes only, only one processor 620 is depicted in the present application in decision device 600. It should be noted, however, that the decision device 600 may also include multiple processors, and thus, the operations and/or method steps disclosed herein may be performed by one processor or by a combination of multiple processors, as described herein. For example, if it is determined in the present application that processor 620 of apparatus 600 performs steps a and B, it should be understood that steps a and B can also be performed by two different processors 620, either jointly or separately (e.g., a first processor performing step a, a second processor performing step B, or both a first and second processor performing steps a and B).
With continued reference to fig. 1, the number of sensing units 101 is at least one. The individual sensing units 101 are described below.
Each sensing unit 101 includes an object under test 400 and a sensor 500. In the process of closing the opening 220 of the cabinet 200 by the cabinet door 300, the sensor 500 may output a distance signal corresponding to the process of the distance change according to the change of the relative position of the object 400 to the sensor 500 (i.e., the distance between the object 400 to be measured and the sensor 500). The distance may be continuously variable during the closing of the door. The distance signal may be a continuous signal. The distance signal may also be a discrete signal; features corresponding to the distance variations can be extracted from the discrete signals. The characteristic of the distance change may comprise a characteristic of the distance increasing and/or decreasing during the closing of the door. The judging device 600 is connected to the sensor 500, receives the distance signal from the sensor 500, and judges the opening/closing state of the cabinet door 300 according to the characteristic of the distance change reflected by the distance signal.
The object to be measured 400 can be mounted on one of the cabinet door 300 and the cabinet body 200; the sensor 500 may be mounted on the other of the cabinet door 300 and the cabinet 200. For example, the object under test 400 may be mounted on the cabinet door 300, and the sensor 500 may be mounted on the cabinet 200. For another example, the object 400 may be mounted on the cabinet 200, and the sensor 500 may be mounted on the cabinet door 300. For convenience of description, in the following description of the present application, the structure and function of the measured object and the sensor are described by taking the example that the measured object 400 is mounted on the cabinet door 300 and the sensor 500 is mounted on the cabinet body 200.
The object 400 may be mounted on the cabinet door 300. In some embodiments, the object 400 may be mounted on the first surface 320 of the cabinet door 300.
The object 400 may comprise magnetic elements, i.e. the object 400 may be magnetic. In some embodiments, the magnetic stabilization is performed. In some embodiments, the object under test 400 may include or be made of a permanent magnet. The permanent magnet may be a natural magnet or an artificial magnet. By way of example, the permanent magnets may include, but are not limited to, neodymium iron boron magnets, samarium cobalt magnets, alnico magnets, and the like. In some embodiments, the object under test 400 may also be a coil that is energized to generate a magnetic field.
The sensor 500 may be mounted on the cabinet 200. In some embodiments, the sensor 500 may be mounted on the second surface 230 of the cabinet 200.
The sensor 500 may detect the strength of the magnetic field of the object under test 400. During the process that the cabinet door 300 rotates along the door shaft 310 and closes the opening 220 of the cabinet body 200, the sensor 500 may output the distance signal according to a change in the relative position of the object to be measured 400 and the sensor 500, that is, the sensor 500 may sense the distance from the object to be measured 400 and output the distance signal.
In some embodiments, the distance signal may be a continuous signal (which may also be referred to as an analog signal). The continuous signal is distinguished from the switching value signal. The continuous signal refers to a signal that continuously changes over time. During the closing of the door, the continuous distance signal can have an infinite number of different values. The time-varying characteristic of the continuous signal corresponds to the time-varying characteristic of the distance during the closing of the door. The features may include increasing and/or decreasing features.
Of course, in some embodiments, the distance signal may also be a discrete signal; features corresponding to the distance variations can be extracted from the discrete signals.
In some embodiments, the sensor 500 may be a hall sensor. As an example, the hall sensor may comprise a linear hall sensor. When the object 400 to be measured approaches the hall sensor, the hall sensor may convert the magnetic field intensity at its position in the magnetic field of the object 400 to a hall voltage and output the hall voltage to the determination device 600.
The distance signal detected by the sensor 500 is correlated with the relative position between the object 400 and the sensor 500 in the door-closed state during the closing of the door 300 to the opening 220 of the cabinet 200.
In some embodiments, the at least one sensing unit 101 comprises a first sensing unit comprising a first measured object and a first sensor, wherein: in the process that the cabinet door closes the opening, the first sensor senses the distance between the first sensor and the first measured object and outputs a continuous first distance signal; and when the first surface is overlapped with the second surface, the first measured object and the first sensor are in a first position relation.
As an example, fig. 4A shows a schematic diagram of an installation position of a first object under test 410 and a first sensor 510 provided according to an embodiment of the present application. The schematic shown in fig. 4A is from a top view. Fig. 4A shows a state where the cabinet door 300 is opened. Referring to fig. 4A, a first object under test 410 and a first sensor 510 are grouped to form the first sensing unit. A first object 410 may be mounted on the first surface 320. The first object 410 may be mounted on the line L2In the middle. The first sensor 510 may be mounted on the second surface 230 of the cabinet 200. The first sensor 510 may be installed at the straight line L1To one side of (a). The cabinet 200 may be considered stationary during the rotation of the cabinet door 300 about the door axis 310 and in the direction of closing the door.
Fig. 4B shows a schematic positional relationship (i.e., a first positional relationship) between the first measured object 410 and the first sensor 510 after the cabinet door 300 in fig. 4A is closed. When the cabinet door 300 is closed, the first surface 320 and the second surface 230 overlap, and the line L1And a straight line L2Overlap, the first object under test 410 and the first sensor 510 do not overlap.
Referring to fig. 4B, while the first surface 320 and the second surface 230 overlap: the first object 410 is located on a straight line L2In the middle, the first sensor 510 is located on a straight line L2Below. I.e., the first object under test 410 is closer to the inside of the cabinet than the first sensor 510.
Fig. 4B also shows the moving path of the first object 410 during the gradual transition of the cabinet door 300 from the open state shown in fig. 4A to the closed state shown in fig. 4BP 1 . According to the moving path of the first object 410 during the door closing processP 1 It can be known that, during the process of closing the opening 220 of the cabinet body 200 by the cabinet door 300, the distance between the first object 410 to be measured and the first sensor 510 is first decreased and then increased.
As can be known from the operating principle of the hall sensor, if the position of the first object under test 410 relative to the first sensor 510 is decreased and then increased, the absolute value of the hall voltage detected by the first sensor 510 is increased and then decreased. Therefore, it is possible to determine whether the cabinet door 300 has been closed by determining a change of a signal (including a hall voltage) detected by the hall sensor using such a characteristic of the hall sensor.
Fig. 4C is a schematic diagram illustrating an electric signal (i.e., a first distance signal) detected by the first sensor 510 during the closing of the door when the first object under test 410 and the first sensor 510 are in the positional relationship shown in fig. 4B.
Referring to FIG. 4C, curveS 1 The electrical signal is shown in an open state of the cabinet door 300, and when the cabinet door 300 is in a normally open state, the value of the electrical signal (hall voltage) detected by the first sensor 510 is "0"; curve lineS 2 The electrical signal is shown in a closed state of the cabinet door 300, and when the cabinet door 300 is in a normally closed state, the value of the electrical signal (hall voltage) detected by the first sensor 510 is a stable voltage value (i.e., DC voltage); curve lineS 3 In the process of closing the door, the electric signal detected by the first sensor 510 is shown, and it can be seen that the absolute value of the electric signal detected by the first sensor 510 is increased and then decreased, which conforms to the working principle of the hall sensor.
The magnitude of the absolute value of the electrical signal detected by the first sensor 510 is indicative of the distance of the first object under test 410 from the first sensor 510.
The positive and negative values of the electrical signal detected by the first sensor 510 depend on the polarity of the magnetic field of the first object under test 410.
The profile of the electrical signal detected by the first sensor 510 may also reflect what state the cabinet door 300 is currently in. For example, it can be determined whether the signal in a certain period of time is on the same curveS 3 And determining whether the door closing process is normal at present by matching. If the curve is to be comparedS 3 Set to a signal mode, i.e., by determining whether the current signal matches a predetermined signal modeTo determine whether the door closing process is normal or not. Assuming a predetermined signal pattern of the door closing process as a curveS 3 ，If a lock is to be cheated, the position of the magnet used by the cheating lock must be identical to the position of the detected object originally installed on the cabinet door, and slight change of the relative positions of the magnet of the cheating lock and the Hall sensor can cause the detected signal to be out of the curveS 3 Resulting in a lock-cheating failure.
The traditional mode that adopts the reed switch to detect the on off state of cabinet door, what the reed switch output is the switching value signal, and the state of closing the door is easily deceived. Be different from traditional mode that adopts the tongue tube to detect the on off state of cabinet door, this application unmanned sales counter, utilize the magnetic part that sets up on the cabinet door and the change of the sensor relative position that sets up on the cabinet body at the door closing in-process, what gather is analog signal, discerns through the mode to the analog signal who gathers, just can be with normally closing the door process and cheat the lock process and distinguish, has increased the degree of difficulty of cheating the lock, has solved the technical problem that this application needs to be solved.
In some embodiments, the at least one sensing unit further comprises a second sensing unit comprising a second analyte and a second sensor, wherein: in the process that the cabinet door closes the opening, the second sensor senses the distance between the second sensor and the second measured object and outputs a continuous second distance signal; and when the first surface is overlapped with the second surface, the second measured object and the second sensor are in a second position relation. In some embodiments, the second positional relationship may be the same as the first positional relationship. In some embodiments, the second positional relationship may be different from the first positional relationship.
As an example, fig. 5A shows a schematic diagram of an installation position of a second object under test 420 and a second sensor 520 provided according to an embodiment of the present application. The schematic shown in fig. 5A is from a top view. Fig. 5A shows a state where the cabinet door 300 is opened. The second object under test 420 and the second sensor 520 form the second sensing unit in groups. Second object to be tested 420 may be mounted on the first surface 320. The second object 420 can be mounted on the line L2In the middle. The second sensor 520 may be mounted on the second surface 230 of the cabinet 200. The second sensor 520 may be installed at the straight line L1One side (e.g. straight line L)1Above). The cabinet body 300 may be considered stationary during the rotation of the cabinet door 300 about the door axis 310 and in a direction towards closing the door.
Fig. 5B shows a schematic positional relationship (i.e., a second positional relationship) between the second measured object 420 and the second sensor 520 after the cabinet door 300 in fig. 5A is closed. When the cabinet door 300 is closed, the first surface 320 and the second surface 230 overlap, and the line L1And a straight line L2And (4) overlapping.
Referring to fig. 5B, while the first surface 320 and the second surface 230 overlap: the second object 420 is located on the line L2In the middle, the second sensor 520 is located on a straight line L2And (4) upward. I.e., the second object 420 is closer to the outside of the cabinet door than the second sensor 520. The second positional relationship (i.e., the relative positional relationship between the second object under test 420 and the second sensor 520) is different from the first positional relationship (i.e., the relative positional relationship between the first object under test 410 and the first sensor 510).
Fig. 5B also shows the moving path of the second object 420 during the gradual transition of the cabinet door 300 from the open state shown in fig. 5A to the closed state shown in fig. 5BP 2 . According to the moving path of the second object 420 during the door closing processP 2 It can be known that, during the process of closing the opening 220 of the cabinet body 200 by the cabinet door 300, the distance between the second measured object 420 and the second sensor 520 gradually decreases.
As can be seen from the foregoing description, the magnitude of the absolute value of the hall voltage detected by the second sensor 520 is gradually increased.
Fig. 5C is a schematic diagram illustrating an electrical signal (i.e., a second distance signal) detected by the second sensor 520 during the door closing process when the relative positions of the second object under test 420 and the second sensor 520 are as shown in fig. 5B.
Referring to FIG. 5C, curves 1 The electrical signal is shown in an open state of the cabinet door 300, and when the cabinet door 300 is in a normally open state, the value of the electrical signal (hall voltage) detected by the second sensor 520 is "0"; curve lines 2 The electrical signal is shown in a closed state of the cabinet door 300, and when the cabinet door 300 is in a normally closed state, the value of the electrical signal (hall voltage) detected by the second sensor 520 is a stable voltage value (i.e., DC voltage); curve lines 3 In the process of closing the door, the electrical signal detected by the second sensor 520 is shown, and it can be seen that the absolute value of the electrical signal detected by the second sensor 520 is gradually increased, which conforms to the working principle of the hall sensor. The magnitude of the absolute value of the electrical signal detected by the second sensor 520 is indicative of the distance between the second object under test 420 and the second sensor 520. The positive and negative values of the electrical signal detected by the second sensor 520 depend on the polarity of the magnetic field of the second object under test 420.
Likewise, if curve is to be plotteds 3 The signal mode is set to be a preset signal mode, and whether the current signal conforms to the curve or not can be judgeds 3 To judge whether the door is normally closed or not.
The number of the sensing units 101 may be two or more. The preset signal mode can be set by combining the positions of the measured object and the sensors in the multiple sensing units, and the opening and closing state of the cabinet door can be judged by combining the signals of the sensors in the multiple sensing units, so that the difficulty in cheating the lock is further improved. For example, the opening and closing state of the cabinet door can be determined according to the corresponding relationship between the first distance signal and the second distance signal.
By way of example, fig. 6A is a schematic diagram illustrating installation positions of an object to be measured and sensors in two sensing units on a cabinet according to an embodiment of the present application. As an example, the two sensing units may be the first and second sensing units described above, respectively. The schematic shown in fig. 6A is from a top view. Fig. 6A shows a state where the cabinet door 300 is opened.
Referring to fig. 6A, a first object under test 410 and a first sensor 510 are grouped to form the first sensing unit. The second object under test 420 and the second sensor 520 form the second sensing unit in groups.
A first object 410 and a second object 420 are mounted on the first surface 320. The first object under test 410 and the second object under test 420 may both be in a straight line L2The above. The first sensor 510 and the second sensor 520 are mounted on the second surface 230 of the cabinet 200. The first sensor 510 and the second sensor 520 may be respectively on a straight line L1On both sides of the base. The cabinet body 300 may be considered stationary during the rotation of the cabinet door 300 about the door axis 310 and in a direction towards closing the door.
Fig. 6B shows a schematic diagram of the positional relationship between the first measured object 410 and the first sensor 510, and the positional relationship between the second measured object 420 and the second sensor 520 after the cabinet door 300 in fig. 6A is closed. When the cabinet door 300 is closed, the first surface 320 and the second surface 230 overlap, and the line L1And a straight line L2And (4) overlapping.
Referring to fig. 6B, when the first surface 320 and the second surface 230 overlap: the first object 410 is located on a straight line L2In the middle, the first sensor 510 is located on a straight line L2Below. I.e., the first object under test 410 is closer to the inside of the cabinet than the first sensor 510. Correspondingly, the second measured object 420 is located on the straight line L2In the middle, the second sensor 520 is located on a straight line L2And (4) upward. I.e., the second object 420 is closer to the outside of the cabinet door than the second sensor 520. The relative positional relationship between the first object under test 410 and the first sensor 510 (i.e., the first positional relationship) is different from the relative positional relationship between the second object under test 420 and the second sensor 520 (i.e., the second positional relationship).
Fig. 6B also shows the moving path of the first object 410 during the gradual transition of the cabinet door 300 from the open state shown in fig. 6A to the closed state shown in fig. 6BP 1 And the moving path of the second object 420P 2 . According to the moving path of the first object 410 during the door closing processP 1 And the moving path of the second object 420P 2 It can be known that, in the process of closing the opening 220 of the cabinet 200 by the cabinet door 300:the distance between the first object under test 410 and the first sensor 420 decreases first and then increases; the distance between the second object under test 420 and the second sensor 520 gradually decreases.
As can be seen from the foregoing description: when the distance between the first object under test 410 and the first sensor 420 decreases and then increases, the absolute value of the hall voltage detected by the first sensor 510 increases and then decreases, as shown in fig. 4C; when the distance between the second measured object 420 and the second sensor 520 gradually decreases, the magnitude of the absolute value of the hall voltage detected by the second sensor 520 gradually increases, as shown in fig. 5C.
Fig. 6C shows a schematic diagram of a relationship between the first distance signal of the first sensor and the second distance signal of the second sensor obtained by combining the first distance signal of the first sensor and the second distance signal of the second sensor.
In fig. 6C, the axis of abscissa indicates the signal output by the first sensor 510 in a certain state during the closing of the cabinet door 300; the ordinate axis indicates the signal output by the second sensor 520 when in this state.
Referring to FIG. 6C, assume that during the closing of the door, the previous time is t1State, the latter time being t2As the state is increased, the signals output by the first sensor 510 and the second sensor 520 need to match the curve S shown in fig. 6C to indicate that the current process is a normal door closing process.
Likewise, if curve is to be plottedSThe preset signal mode can be set by determining whether the currently received signal from the first sensor 510 and the signal from the second sensor 520 conform to the curveSTo judge whether the door is normally closed or not.
It should be noted that, for the sake of brevity only, only three arrangements of the sensing unit are described in detail in the present application. Those skilled in the art will understand that: the number of sensing units may be other without departing from the core spirit of the present application; the position relation between the measured object and the sensor in the sensing unit can be other than the core spirit of the application; the polarity of the magnetic field of the object under test may be other without departing from the core spirit of the present application; the sensor may also be other sensors without departing from the core spirit of the present application.
According to the foregoing description, the at least one sensor 500 transmits the detected analog signal to the determination device 600. The judging device 600 may judge the opening and closing state of the cabinet door 300 according to the signal received from the at least one sensor 500. For example, the determining device 600 may determine that the cabinet door 300 is closed by determining that the signal matches a preset signal mode.
After the installation positions of the object to be tested 400 and the sensor 500 on the cabinet door 300 and the cabinet body 200 are determined, the preset signal mode can be considered to be determined. Of course, in some embodiments, the predetermined signal pattern may be a range including the determined signal profile. In some embodiments, the predetermined signal pattern may be obtained by multiple door closing test data after the installation positions of the object under test 400 and the sensor 500 are determined. In some embodiments, the installation positions of the object to be measured and the sensor in the sensing unit on the cabinet may be random, for example, the positions and/or sizes of the installation holes for installing the object to be measured and/or the sensor may not be fixed, so that the preset signal patterns of different cabinets are different, thereby further increasing the difficulty of lock cheating.
In summary, the problem of determining whether the door is normally closed is switched to the problem of performing pattern recognition on the current signal.
After receiving the current signal from the at least one sensor 500, the determining device 600 may determine whether the current signal matches the preset signal pattern based on at least one of the following models: a hidden Markov model; a GMM model; observing a probability model; and RNN models.
In some embodiments, the cabinet 100 may also be fitted with a lock. The lock may include a lock housing and a lock bolt. The lock seat may be mounted on one of the cabinet body 200 and the cabinet door 300; the latch may be mounted to the other of the cabinet 200 and the door 300. The lock seat can be provided with a lock hole. The latch may enter the locking hole, thereby locking the closed state of the cabinet door 300.
The lock may further comprise a drive means. The driving device can be connected with the lock bolt and can drive the lock bolt to move along a target direction and enter the lock hole when in work.
The driving device may be connected to the determining device 600, and when the determining device 600 determines that the signal matches the preset signal pattern, that is, when the door is normally closed, the determining device 600 may generate a lock closing instruction, and send the lock closing instruction to the driving device, and the driving device drives the lock bolt to move and enter the lock hole according to the lock closing instruction.
The application also provides a method for detecting the closing of the cabinet door, which comprises the following steps: s110, receiving the at least one distance signal from the at least one sensor; and S120, determining that the at least one distance signal is consistent with a preset signal mode, and further determining that the cabinet door is closed.
In summary, the present application provides a cabinet and a method for detecting the closing of a door of the cabinet. This application the cupboard utilizes the magnetism spare of setting on the cabinet door and the sensor relative position of setting on the cabinet body to close the change of door in-process, what gather is similar voiceprint signal's continuous signal, discerns through the mode to the signal of gathering, just can normally close the door process and cheat the lock process and distinguish, has increased the degree of difficulty of cheating the lock, has solved the technical problem that this application needs to be solved.
In conclusion, upon reading the present detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure can be presented by way of example only, and not limitation. Those skilled in the art will appreciate that the present application is intended to cover various reasonable variations, adaptations, and modifications of the embodiments described herein, although not explicitly described herein. Such alterations, improvements, and modifications are intended to be suggested by this application and are within the spirit and scope of the exemplary embodiments of the application.
Furthermore, certain terminology has been used in this application to describe embodiments of the application. For example, "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various portions of this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined as suitable in one or more embodiments of the application.
It should be appreciated that in the foregoing description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of such feature. Alternatively, various features may be dispersed throughout several embodiments of the application. This is not to be taken as an admission that any of the features of the claims are essential, and it is fully possible for a person skilled in the art to extract some of them as separate embodiments when reading the present application. That is, embodiments in the present application may also be understood as an integration of multiple sub-embodiments. And each sub-embodiment described herein is equally applicable to less than all features of a single foregoing disclosed embodiment.
In some embodiments, numbers expressing quantities or properties used to describe and claim certain embodiments of the application are to be understood as being modified in certain instances by the term "about", "approximately" or "substantially". For example, "about," "approximately," or "substantially" can mean a ± 20% variation of the value it describes, unless otherwise specified. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the embodiments of the application are approximations, the numerical values set forth in the specific examples are reported as precisely as possible.
Each patent, patent application, publication of a patent application, and other material, such as articles, books, descriptions, publications, documents, articles, and the like, cited herein is hereby incorporated by reference. All matters hithertofore set forth herein except as related to any prosecution history, may be inconsistent or conflicting with this document or any prosecution history which may have a limiting effect on the broadest scope of the claims. Now or later associated with this document. For example, if there is any inconsistency or conflict in the description, definition, and/or use of terms associated with any of the included materials with respect to the terms, descriptions, definitions, and/or uses associated with this document, the terms in this document are used.
Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Accordingly, the disclosed embodiments are presented by way of example only, and not limitation. Those skilled in the art may implement the present application in alternative configurations according to the embodiments of the present application. Thus, embodiments of the present application are not limited to those embodiments described with precision in the application.

Claims (17)

1. A cabinet, comprising:
a cabinet including an opening;
a cabinet door closing the opening in a closed state;
at least one sensing unit, each of the at least one sensing unit comprising:
a measured object mounted on one of the cabinet door and the cabinet body, an
The sensor is arranged on the other one of the cabinet door and the cabinet body and is configured to sense a distance change process of the object to be measured in the process that the cabinet door closes the opening and output a distance signal corresponding to the distance change process, wherein when the cabinet door is in a closed state, the object to be measured and the sensor are not overlapped in position; and
and the judging device is connected with the at least one sensor, receives the at least one distance signal and judges the opening and closing state of the cabinet door according to the change characteristics of the at least one distance signal caused by the non-overlapping position relation of the measured object and the sensor in the closing process of the cabinet door along with time.
2. The cabinet of claim 1, wherein the object under test comprises a magnetic member, the sensor comprises a linear hall sensor that senses a magnetic field strength of the magnetic member when the linear hall sensor is positioned in a magnetic field of the magnetic member;
the sensor senses a process of distance change between the sensor and the measured object in a process of closing the opening of the cabinet door and outputs a distance signal corresponding to the process of distance change, and the process comprises the following steps:
in the process that the cabinet door closes the opening, the position change of the linear Hall sensor in the magnetic field causes the magnetic field intensity change sensed by the linear Hall sensor, and then the linear Hall sensor outputs an electric signal corresponding to the magnetic field intensity, wherein the electric signal is the distance signal.
3. The cabinet of claim 1, wherein the cabinet door comprises a first surface and the cabinet body comprises a second surface that overlaps the first surface when the cabinet door closes the opening; and
the object to be measured is mounted on one of the first surface and the second surface, and the sensor is mounted on the other of the first surface and the second surface.
4. The cabinet of claim 3, wherein the at least one sensing unit comprises a first sensing unit, the object of measurement of the first sensing unit comprises a first object of measurement, and the sensor of the first sensing unit comprises a first sensor, wherein:
in the process that the cabinet door closes the opening, the first sensor senses the process of distance change between the first sensor and the first measured object and outputs a first distance signal; and
when the first surface is overlapped with the second surface, the first measured object is not overlapped with the first sensor, and the first measured object and the first sensor are in a first position relation.
5. The cabinet of claim 4, wherein the time-varying characteristic of the first distance signal matches the time-varying characteristic of the distance between the first sensor and the first object under test during closing of the cabinet door; and
during the closing process of the cabinet door, the characteristic that the distance between the first sensor and the first measured object changes along with the time comprises:
the distance between the first sensor and the first measured object is firstly reduced and then increased along with the time.
6. The cabinet of claim 5, wherein the first sensor is mounted on the cabinet body and the first object to be tested is mounted on the cabinet door; and
the first positional relationship includes: the first measured object is closer to the inner side of the cabinet body than the first sensor.
7. The cabinet of claim 4, wherein the at least one sensing unit further comprises a second sensing unit, the measurand of the second sensing unit comprises a second measurand, the sensor of the second sensing unit comprises a second sensor, wherein:
in the process that the cabinet door closes the opening, the second sensor senses the process of distance change between the second sensor and the second measured object and outputs a second distance signal; and
when the first surface overlaps the second surface, the second object is in a second positional relationship with the second sensor, wherein the second positional relationship is different from the first positional relationship.
8. The cabinet of claim 7, wherein the time-varying characteristic of the second distance signal matches the time-varying characteristic of the distance between the second sensor and the second object under test during closing of the cabinet door; and
in the process of closing the cabinet door, the distance change characteristic of the second sensor and the second measured object comprises:
the distance between the second sensor and the second measured object gradually decreases with time.
9. The cabinet of claim 8, wherein the second object to be measured is mounted on the cabinet door, and the second sensor is mounted on the cabinet body; and
the second positional relationship includes: the second measured object is closer to the outer side of the cabinet door than the second sensor.
10. The cabinet according to claim 7, wherein said determining the opening/closing state of the cabinet door according to the time-varying characteristic of the at least one distance signal during the closing process of the cabinet door comprises:
and judging the opening and closing state of the cabinet door according to the corresponding relation between the first distance signal and the second distance signal.
11. The cabinet according to claim 1, wherein the determining means for determining the opening/closing state of the cabinet door according to the time-varying characteristic of the at least one distance signal during the closing process of the cabinet door comprises:
and the judging device determines that the at least one distance signal is matched with a preset signal mode, and further determines that the cabinet door is closed.
12. The cabinet of claim 11, wherein the predetermined signal pattern is obtained by the determining means based on historical door closing data.
13. The cabinet according to claim 11, wherein the determining means determines that the at least one distance signal matches the predetermined signal pattern based on at least one of the following models:
a hidden Markov model;
a GMM model;
observing a probability model; and
an RNN model.
14. A method of detecting the closing of a cabinet door for detecting the open and closed state of a cabinet door according to any one of claims 1 to 10, comprising:
receiving the at least one range signal; and
and determining that the at least one distance signal is matched with a preset signal mode, and further determining that the cabinet door is closed.
15. The method of detecting the closing of a cabinet door according to claim 14, wherein the predetermined signal pattern is obtained by the determining means based on historical door closing data.
16. The method of detecting the closing of a cabinet door of claim 14, wherein the predetermined signal pattern is associated with the at least one sensor and the location of the at least one object under test mounted on the cabinet.
17. The method of detecting a closing of a cabinet door of claim 14, wherein said determining that the at least one distance signal matches a predetermined signal pattern comprises:
determining that the at least one distance signal matches the preset signal pattern based on at least one of a hidden Markov model, a GMM model, an observation probability model, and an RNN model.
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CN113639789A (en) * 2021-07-20 2021-11-12 支付宝(杭州)信息技术有限公司 System and method for detecting closing of cabinet door
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