Automatic door and method for detecting same, electric shower room

Abstract

The application discloses an automatic door and a detection method thereof, and an electric shower room, and belongs to the automatic door field. The automatic door comprises a door frame, a door body, a bumper strip, a flexible circuit board and at least two thin film pressure sensors. The door body is movably arranged between a closed position and an open position of the door frame, and the door body has a matching side edge which is separably matched with the door frame. The matching side edge is connected with the door frame when the door body is in the closed position. The bumper strip is wrapped on the matching side edge. The flexible circuit board is arranged between the bumper strip and the matching side edge and extends along the length direction of the matching side edge. The at least two thin film pressure sensors are spaced apart from each other along the length direction and are welded on one side of the flexible circuit board away from the matching side edge. The thin film pressure sensors are electrically connected with the flexible circuit board, and the thin film pressure sensors are used for detecting whether a hand clamping condition exists. The application reduces the wiring required for installing the sensors, so that the multiple sensors are installed in the narrow area between the matching side edge and the bumper strip.

Description

Technical Field

[0001] This application relates to the field of automatic doors, and in particular to an automatic door and its testing method, and an electric shower room. Background Technology

[0002] In automatic doors such as swing doors and sliding doors, pressure sensors installed on the edge of the door can detect whether there are foreign objects between the door and the door frame, such as to achieve anti-pinch detection.

[0003] However, in order to achieve anti-pinch detection for different age groups, multiple sensors need to be installed at intervals along the height of the door in a narrow area at the edge of the door, which makes the wiring in this narrow area quite complicated.

[0004] Application content

[0005] The main purpose of this application is to provide an automatic door and its detection method, as well as an electric shower room, which aims to solve the technical problem of complex wiring in the narrow area of ​​the door edge in the prior art.

[0006] To achieve the above objectives, in a first aspect, this application proposes an automatic door, comprising:

[0007] Door frame;

[0008] The door body is movably mounted on the door frame between the closed position and the open position, and the door body has a mating side that can be separated from and engaged with the door frame. When the door body is in the closed position, the mating side is connected to the door frame.

[0009] Anti-collision strips, which cover the mating sides;

[0010] A flexible circuit board is disposed between the anti-collision strip and the mating side, and extends along the length direction of the mating side; and

[0011] At least two thin-film pressure sensors are soldered to each other at intervals along the length of a flexible circuit board on the side opposite to the mating side, and the thin-film pressure sensors are electrically connected to the flexible circuit board. The thin-film pressure sensors are used to detect whether a hand is pinched.

[0012] In one possible embodiment of this application, a portion of the sidewall of the flexible circuit board is attached to the anti-collision strip.

[0013] In one possible embodiment of this application, the flexible circuit board includes connecting portions and mounting portions arranged alternately in sequence along the length direction. The number of mounting portions is consistent with the number of thin-film pressure sensors and corresponds one-to-one. Both sides of the mounting portions protrude from the two sides of the connecting portions.

[0014] The thin-film pressure sensor is soldered onto the mounting section.

[0015] In one possible embodiment of this application, the automatic door further includes:

[0016] A drive assembly, which is connected to the door body, is used to drive the door body to move between the open and closed positions.

[0017] At least two voltage conversion modules are connected to a flexible circuit board to receive the real-time voltage signal output by the corresponding thin-film pressure sensor and amplify the real-time voltage signal to obtain an amplified detection signal.

[0018] The controller is connected to the drive assembly and the voltage conversion module respectively, and is used to determine whether at least one of the at least two amplified detection signals is greater than the pinch threshold. If at least one amplified detection signal is greater than the pinch threshold, the controller controls the drive assembly to drive the door to open.

[0019] In one possible embodiment of this application, the voltage conversion module includes:

[0020] A balancing resistor, one end of which is connected to the flexible circuit board;

[0021] The operational amplifier has its non-inverting input connected to the other end of the balancing resistor, and its output connected to the controller.

[0022] The reverse resistor has one end connected to the inverting input of the operational amplifier and the other end grounded.

[0023] An adjustable potentiometer, one end of which is connected to the inverting input terminal and one end of the inverting resistor, and the other end of which is connected to the output terminal and the controller.

[0024] In one possible embodiment of this application, the automatic door further includes:

[0025] A signal input unit is connected to a flexible circuit board. The signal input unit has at least two first interfaces, and the first interfaces are connected to corresponding balancing resistors.

[0026] The signal output unit has at least two second interfaces, which are connected to the output terminals of the corresponding operational amplifiers.

[0027] Secondly, this application also provides an electric shower room, including the automatic door as described above.

[0028] Thirdly, this application also provides an automatic door anti-pinch detection method, applicable to automatic doors, wherein the automatic door includes:

[0029] Door frame;

[0030] A door body, which is movably disposed on the door frame between a closed position and an open position, and the door body has a mating side that can be separably engaged with the door frame. When the door body is in the closed position, the mating side is connected to the door frame.

[0031] A crash barrier strip, which covers the mating side;

[0032] A flexible circuit board, wherein the flexible circuit board is disposed between the anti-collision strip and the mating side, and extends along the length direction of the mating side; and

[0033] At least two thin-film pressure sensors are soldered to each other at intervals along the length direction on the side of the flexible circuit board away from the mating side, and the thin-film pressure sensors are electrically connected to the flexible circuit board. The thin-film pressure sensors are used to detect whether a hand is pinched.

[0034] The method includes:

[0035] Acquire the real-time voltage signals detected by at least two thin-film pressure sensors;

[0036] Based on the real-time voltage signal, the door is controlled to move between the open position and the closed position.

[0037] In one possible embodiment of this application, controlling the door to switch between the open position and the closed position based on the real-time voltage signal includes:

[0038] Determine whether at least one of the at least two real-time voltage signals is greater than the hand-clamping critical threshold;

[0039] If at least one of the real-time voltage signals is greater than the hand-clamping critical threshold, the door is controlled to move to the open position.

[0040] In one possible embodiment of this application, determining whether at least one of the at least two real-time voltage signals is greater than a hand-clamping threshold includes:

[0041] The real-time voltage signal is amplified to obtain an amplified detection signal;

[0042] Determine whether at least one of the at least two amplified detection signals is greater than the hand-clamping threshold.

[0043] This application provides an automatic door. In the door body, multiple thin-film pressure sensors, arranged along the length of the mating side (which is separable from the door frame), are soldered onto a flexible circuit board. These sensors are electrically connected to each other via the flexible circuit board's built-in wiring structure. After soldering the flexible circuit board and the thin-film pressure sensors together, the overall size is small, allowing them to be conveniently placed between the anti-collision strip and the mating side. Therefore, the automatic door provided by this application not only meets the anti-pinch detection needs of people of different heights but also reduces the wiring required for sensor installation, facilitating the installation of multiple sensors in the narrow area between the mating side and the anti-collision strip. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of an embodiment of the sliding door of this application;

[0046] Figure 2 This is a schematic diagram of the structure of the sliding door in one embodiment of this application, showing the side panel.

[0047] Figure 3 This is a schematic diagram showing the connection relationship between the anti-collision strip, the thin-film pressure sensor, and the flexible circuit board in one embodiment of the sliding door of this application;

[0048] Figure 4 This is a schematic diagram of the thin-film pressure sensor in the sliding door of this application;

[0049] Figure 5 This is a schematic diagram of the flexible circuit board in the sliding door of this application;

[0050] Figure 6 This is a schematic diagram showing the connections between the various modules in the sliding door of this application;

[0051] Figure 7 This is a circuit diagram of the voltage conversion module in the sliding door of this application;

[0052] Figure 8 This is a flowchart illustrating the first embodiment of the automatic door anti-pinch detection method of this application;

[0053] Figure 9 for Figure 8 Detailed flowchart of step S200;

[0054] Figure 10 This is a flowchart illustrating the second embodiment of the automatic door anti-pinch detection method of this application.

[0055] Explanation of icon numbers:

[0056] label name label name 10 door frame 11 Top frame beam 12 Side frame 13 bottom frame 20 Door 21 Matching the side 30 Flexible printed circuit board (FPC) 31 Connection part 32 Installation Department 40 Thin-film pressure sensor 50 Driver components 60 Voltage conversion module 70 controller 80 Anti-collision strip 81 Part One 82 Part Two 83 Middle part

[0057] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0059] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0060] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0062] This application proposes an automatic door. The following will combine... Figures 1 to 7 The automatic door of the embodiment of this application will be described in detail.

[0063] It should be noted that the automatic door in this application can be a hinged door or a sliding door, etc. In this embodiment, the automatic door is a sliding door. The following description will also use a sliding door as an example. Of course, based on the content disclosed in this embodiment, those skilled in the art can easily conceive of the specific structure when the automatic door is a hinged door.

[0064] In this embodiment, an automatic door includes: a door frame 10, a door body 20, a crash bar 80, a flexible circuit board 30, and at least two thin-film pressure sensors 40.

[0065] The door body 20 is movably disposed on the door frame 10 between a closed position and an open position, and the door body 20 has a mating side 21 that can be separably engaged with the door frame 10. When the door body 20 is in the closed position, the mating side 21 is connected to the door frame 10. A bumper strip 80 covers the mating side 21. A flexible circuit board 30 is disposed between the bumper strip 80 and the mating side 21 and extends along the length direction of the mating side 21. At least two thin-film pressure sensors 40 are soldered at intervals along the length direction to the side of the flexible circuit board 30 opposite to the mating side 21, and the thin-film pressure sensors 40 are electrically connected to the flexible circuit board 30. The thin-film pressure sensors 40 are used to detect whether a hand is pinched.

[0066] Specifically, please refer to Figure 1 The door frame 10 includes at least a top frame beam 11, two side frames 12, and a bottom frame 13 forming a frame structure. The side frames 12 can be fixed to a wall, such as a bathroom wall or the frame of an automatic shower room, using screws or other fasteners. The two ends of the top frame beam 11 can be fixed to the side frames 12 by welding or other equivalent methods, or they can be fixed to the ceiling using screws or other fasteners, and then connected to the side frames 12 to form the frame structure. The bottom frame 13 can also be fixed to the floor using screws or other fasteners. Of course, in some embodiments, the bottom frame 13 can be omitted.

[0067] The door body 20 of the automatic door is movably installed within the door frame 10. At least two door bodies 20 can be installed within the door frame 10, and at least one of the at least two door bodies 20 is slidably installed within the door frame 10 to move between an open position and a closed position. In one example, two door bodies 20 are included, one of which is a fixed door body, fixedly installed within the door frame 10 and adjacent to one side frame 12, and the other door body 20 is arranged parallel to the fixed door body 20 and is slidable to detachably engage with the other side frame 12. In the sliding direction, the door body 20 includes a mating side 21. It is understood that in the closed position, the mating side 21 of the door body 20 is connected to the side frame 12 of the door frame 10, while in the open position, the mating side 21 of the door body 20 is separated from the side frame 12 of the door frame 10. It is worth mentioning that the mating side 21 of the door body 20 can be one side of the door body 20 in the pushing and pulling direction, or it can be both sides of the door body 20 in the pushing and pulling direction.

[0068] The length of the mating side 21 corresponds to the height of the door frame 10. The surface of the mating side 21 is covered with a bumper strip 80. Please refer to [link / reference]. Figure 2 and Figure 3 The anti-collision strip 80 includes a first portion 81 and a second portion 82 arranged parallel to each other and spaced apart, and a middle portion 83 connecting the first portion 81 and the second portion 82. The first portion 81 and the second portion 82 are respectively attached to the two side walls of the door body 20, and the middle portion 83 is attached to at least a portion of the surface of the mating side 21, so that the anti-collision strip 80 covers the mating side 21. An FPC (Flexible Printed Circuit) 30 is provided between the middle portion 83 and the mating side 21, and the FPC extends along the length direction of the mating side 21. The FPC 30 has at least two interfaces along the length direction of the mating side 21.

[0069] At least two thin-film pressure sensors 40 are spaced apart along the length of the mating side 21 on the surface of the FPC30 facing away from the mating side 21, and each thin-film pressure sensor 40 is soldered inside the FPC30. Please refer to [link to relevant documentation]. Figure 4 The wiring of the thin-film pressure sensor 40 is connected to the corresponding interface on the FPC 30. The thin-film pressure sensor 40 utilizes thin-film fabrication technology to deposit a thin-film strain resistor on a metallic elastic substrate, offering advantages such as high precision, good creep resistance, and strong anti-interference capabilities. Therefore, when a foreign object exists between the mating side 21 of the door 20 and the side frame 12, the anti-collision strip 80 deforms, causing pressure to be generated in the thin-film pressure sensor 40. This, in turn, changes the signal output by the thin-film pressure sensor 40, detecting the presence of a pinched hand.

[0070] The thin-film pressure sensor 40 may include four sensors arranged along the height of the door body 20, thereby covering the anti-pinch detection function for people of all ages and different heights, and thus improving the accuracy of detection.

[0071] Therefore, compared to the complex wiring in the narrow area of ​​the mating side 21 caused by multiple thin-film pressure sensors 40 in the prior art, the multiple thin-film pressure sensors 40 arranged along the length of the mating side 21 on the door body 20 and door frame 10 of the automatic door provided in this embodiment are all soldered onto the flexible circuit board 30. This allows for electrical connection between them through the flexible circuit board 30, which has an internal wiring structure. Furthermore, after the flexible circuit board 30 and the thin-film pressure sensors 40 are soldered together, the overall volume is small, and all can be arranged between the anti-collision strip 80 and the mating side 21. Thus, the automatic door provided in this application not only meets the anti-pinch detection needs of people of different heights but also reduces the wiring required for sensor installation, facilitating installation in the narrow area between the mating side 21 and the anti-collision strip 80.

[0072] In related technologies, it's easy to understand that sliding doors can determine if a hand is trapped by detecting the rotational speed of the drive motor. When a hand is trapped, the motor stalls, increasing the current. However, this detection method can reduce the lifespan of the drive motor, and it relies on the user's hand having been trapped for some time, making it impractical and unsafe. Alternatively, related technologies can use a human body sensor to detect the presence of someone. However, these sensors have limited sensing range and blind spots, posing potential safety hazards. Another approach involves adding a single pressure sensor to the side frame 12. This ensures that the fixed frame 10 only deforms when a significant collision occurs between the moving door 20 and the fixed frame 10, potentially causing serious injury to elderly people or children.

[0073] In this embodiment, the flexible circuit board 30 is finally attached to the inside of the anti-collision strip 80 by soldering the thin film pressure sensor 40 to the FPC flexible board. It supports up to four pressure sensors, which can basically meet the needs of people of different heights. It not only has a large sensing range, but also high accuracy.

[0074] In one possible embodiment of this application, a portion of the sidewall of the flexible circuit board 30 is attached to the anti-collision strip 80. See also... Figure 2 and Figure 3The FPC30 is connected to the inner wall of the middle section, thereby connecting the flexible circuit board 30 to the anti-collision strip 80. Thus, in this embodiment, when installing or removing the diaphragm pressure sensor 40, the automatic door can be directly installed or removed by replacing the entire anti-collision strip 80, without disassembling other parts of the automatic door. This facilitates the installation and subsequent maintenance of the automatic door and reduces the overall maintenance cost.

[0075] In one possible embodiment of this application, the flexible circuit board 30 includes a connecting portion 31 and a mounting portion 32 arranged alternately in sequence along the length direction. The number of mounting portions 32 is consistent with the number of thin-film pressure sensors 40 and corresponds one-to-one. Both sides of the mounting portion 32 protrude from both sides of the connecting portion 31. The thin-film pressure sensor 40 is soldered to the mounting portion 32.

[0076] Specifically, the number of mounting parts 32 is determined by the number of thin-film pressure sensors 40 that need to be installed, and the spacing between adjacent mounting parts 32 is also determined according to the design height of the corresponding thin-film pressure sensor 40.

[0077] Please see Figure 5 Both the connecting portion 31 and the mounting portion 32 of the flexible circuit board 30 are strip-shaped. The width of the mounting portion 32 is greater than that of the connecting portion 31, and the axes of the two in the extension direction are collinear, so that both sides of the mounting portion 32 protrude from both sides of the connecting portion 31. The mounting portion 32 provides a platform for soldering the thin film pressure sensor 40, so as to facilitate the soldering installation of the thin film pressure sensor 40 at the mating side 21, and ensure the relative position between multiple thin film pressure sensors 40.

[0078] Please see Figure 6 In one possible embodiment of this application, the automatic door further includes: a drive assembly 50, at least two voltage conversion modules 60, and a controller 70.

[0079] The drive assembly 50 is connected to the door body 20 and is used to drive the door body 20 to move between the open position and the closed position; the voltage conversion module 60 is connected to the flexible circuit board 30 and is used to receive the real-time voltage signal output by the corresponding thin-film pressure sensor 40 and amplify the real-time voltage signal to obtain an amplified detection signal; the controller 70 is connected to the drive assembly 50 and the voltage conversion module 60 respectively and is used to determine whether at least one of the at least two amplified detection signals is greater than the pinch threshold. If at least one amplified detection signal is greater than the pinch threshold, the controller controls the drive assembly 50 to drive the door body 20 to open.

[0080] Specifically, the drive assembly 50 may include a drive motor and a transmission assembly. The drive motor may be a servo motor, used to move the door 20 from the open position to the closed position, or to move the door 20 from the closed position to the open position. The number of voltage conversion modules 60 is the same as the number of thin-film pressure sensors 40, so that they correspond one-to-one, and the voltage conversion module 60 receives the real-time voltage signal output by the corresponding thin-film pressure sensor 40. The controller 70 may be a PLC or a main control MCU (Microcontroller Unit).

[0081] Understandably, the pressure of the membrane pressure sensor 40 is proportional to the voltage signal output by the membrane pressure sensor 40. Thus, when the anti-collision strip 80 deforms, the pressure generated on the membrane pressure sensor 40 changes, and the greater the pressure on the membrane sensor, the smaller the internal resistance of the membrane pressure sensor 40, and the larger the real-time voltage signal output.

[0082] However, since the real-time voltage value of the thin-film pressure sensor 40 is relatively small, this embodiment uses a voltage conversion module 60 to amplify the real-time voltage signal of the thin-film pressure sensor 40 to obtain an amplified detection signal. The controller 70 receives the amplified detection signal V0 and compares it with the hand-clamping threshold Vef. When V0 > Vef, the controller 70 determines that a hand-clamping situation has occurred, that is, there is a foreign object such as a hand between the mating side 21 and the corresponding side frame 12. In order to avoid a dangerous situation, the controller 70 immediately controls the drive assembly 50 to drive the door 20 to open.

[0083] Therefore, in this embodiment, the voltage conversion module 60 amplifies the real-time voltage signal output by the thin-film pressure sensor 40 to improve the accuracy of the judgment.

[0084] In one possible embodiment of this application, the voltage conversion module 60 specifically includes: a balancing resistor, an operational amplifier, a reverse resistor, and an adjustable potentiometer.

[0085] One end of the balancing resistor is connected to the flexible circuit board 30; the non-inverting input of the operational amplifier is connected to the other end of the balancing resistor, and the output of the operational amplifier is connected to the controller 70; one end of the inverting resistor is connected to the inverting input of the operational amplifier, and the other end of the inverting resistor is grounded; one end of the adjustable potentiometer is connected to both the inverting input and one end of the inverting resistor, and the other end of the adjustable potentiometer is connected to both the output and the controller 70.

[0086] Please see Figure 7This embodiment uses four thin-film pressure sensors 40 as an example for specific explanation. Specifically, for the thin-film voltage sensor S1-1, one end of the balancing resistor R1 is connected to the thin-film voltage sensor S1-1, and the other end of the balancing resistor R1 is connected to the non-inverting input terminal of the operational amplifier U1. The output terminal of the operational amplifier U1 is connected to the controller 70. The inverting input terminal of the operational amplifier U1 is connected to the inverting resistor R2 and the adjustable potentiometer RF1, respectively. The other end of the inverting resistor R2 is grounded, and the other end of the adjustable potentiometer RF1 is connected to the output terminal of the operational amplifier U1 and the controller 70.

[0087] For the thin-film voltage sensor S2-1, one end of the balancing resistor R3 is connected to the thin-film voltage sensor S2-1, and the other end of the balancing resistor R3 is connected to the non-inverting input terminal of the operational amplifier U2. The output terminal of the operational amplifier U2 is connected to the controller 70. The inverting input terminal of the operational amplifier U2 is connected to the inverting resistor R4 and the adjustable potentiometer RF2, respectively. The other end of the inverting resistor R4 is grounded, and the other end of the adjustable potentiometer RF2 is connected to the output terminal of the operational amplifier U2 and the controller 70.

[0088] For the thin-film voltage sensor S3-1, one end of the balancing resistor R5 is connected to the thin-film voltage sensor S3-1, and the other end of the balancing resistor R5 is connected to the non-inverting input of the operational amplifier U3. The output of the operational amplifier U3 is connected to the controller 70. The inverting input of the operational amplifier U3 is connected to the inverting resistor R6 and the adjustable potentiometer RF3, respectively. The other end of the inverting resistor R6 is grounded, and the other end of the adjustable potentiometer RF3 is connected to the output of the operational amplifier U3 and the controller 70.

[0089] For the thin-film voltage sensor S4-1, one end of the balancing resistor R7 is connected to the thin-film voltage sensor S4-1, and the other end of the balancing resistor R7 is connected to the non-inverting input of the operational amplifier U4. The output of the operational amplifier U4 is connected to the controller 70. The inverting input of the operational amplifier U4 is connected to the inverting resistor R8 and the adjustable potentiometer RF4, respectively. The other end of the inverting resistor R8 is grounded, and the other end of the adjustable potentiometer RF4 is connected to the output of the operational amplifier U4 and the controller 70.

[0090] It is worth mentioning that operational amplifiers U1 and U2 can also be integrated into the same dual operational amplifier, and operational amplifiers U3 and U4 can also be integrated into the same dual operational amplifier. For example, two sets of LMV358 dual operational amplifiers can be selected. That is, in this case, the voltage conversion module 60 only needs to include two sets. Therefore, in this embodiment, fewer circuit components are used, the circuit is simple, and the cost is low.

[0091] In this embodiment, the amplification factor of the voltage conversion module 60 can be changed by adjusting the actual resistance value of the adjustable potentiometer corresponding to each thin-film sensor, thereby outputting voltage signals with different amplification factors. This not only facilitates the calibration of differences among multiple thin-film pressure sensors 40, but also dynamically meets the needs of different thin-film pressure sensors 40 triggering different pressures at different positions on the door body 20.

[0092] In one possible embodiment of this application, the automatic door further includes a signal input unit JP1 and a signal output unit JP2.

[0093] The signal input unit JP1 is connected to the flexible circuit board 30. The signal input unit JP1 has at least two first interfaces, and the first interfaces are connected to the corresponding balancing resistors. The signal output unit JP2 has at least two second interfaces, and the second interfaces are connected to the output terminals of the corresponding operational amplifiers.

[0094] Please see Figure 7 The input terminal of the signal input unit JP1 is connected to the flexible circuit board 30, and the signal input unit JP1 includes 8 first interfaces, of which 4 first interfaces are respectively connected to the thin film pressure sensor S1-1, thin film pressure sensor S2-1, thin film pressure sensor S3-1 and thin film pressure sensor S4-1 to transmit the corresponding real-time pressure signal to the corresponding voltage conversion module 60.

[0095] The signal output unit JP2 includes four corresponding second interfaces A1, A2, A3, and A4. Second interface A1 is connected to the output of operational amplifier U1, second interface A2 is connected to the output of operational amplifier U2, second interface A3 is connected to the output of operational amplifier U3, and second interface A4 is connected to the output of operational amplifier U4. Then, the output of the signal output unit JP2 is connected to the controller 70.

[0096] In this embodiment, at least two voltage conversion modules 60 are connected to the flexible circuit board 30 through the signal input unit and to the controller 70 through the signal output unit, which makes the circuit structure more organized and facilitates the connection and maintenance of the circuit.

[0097] In one possible embodiment of this application, to make the overall size of the automatic door smaller and the appearance cleaner, the drive assembly 50, voltage conversion module 60, and controller 70 are all disposed within the door frame 10. For details, please refer to... Figure 1 The drive assembly 50, voltage conversion module 60 and controller 70 can all be installed inside the top frame beam 11.

[0098] Secondly, this application also provides an electric shower room, including the automatic door as described above. The specific structure of the automatic door is as described in the above embodiments. Since this electric shower room adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0099] In one possible embodiment of this application, the automatic door is a sliding door. Sliding doors not only make it convenient for users to open or close the door in the shower room, but also occupy less operating space.

[0100] Thirdly, this application also provides a method for detecting hand pinching in automatic doors; please refer to [link to relevant documentation]. Figure 8 , Figure 8 This is a flowchart illustrating the first embodiment of the automatic door anti-pinch detection method of this application.

[0101] This embodiment applies to automatic doors. Please refer to the above embodiment for the specific structure of the automatic door. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.

[0102] In this embodiment, the method includes:

[0103] Step S100: Obtain the real-time voltage signals detected by at least two thin-film pressure sensors.

[0104] Specifically, the execution entity of the method in this embodiment is the controller of the automatic door. This controller can be a PLC or a main control MCU (Microcontroller Unit). During the operation of the automatic door, the controller acquires the real-time voltage signals detected by each membrane pressure sensor.

[0105] Step S200: Determine whether a hand is pinched based on the real-time voltage signal.

[0106] After acquiring the real-time voltage signal detected by each membrane pressure sensor, the controller can monitor the real-time voltage signal of each membrane pressure sensor, and thus determine whether the automatic door is pinching a hand based on the real-time voltage signal.

[0107] Specifically, as one option in this embodiment, the controller can determine whether a hand is pinched based on changes in the real-time voltage signal. In one example, the controller can generate a real-time voltage signal curve for each thin-film pressure sensor based on each real-time voltage signal. The change value between two adjacent real-time voltage signals is obtained from the curve, and then the controller can determine whether the change value is greater than a preset threshold. If the change value is greater than the preset threshold, it is determined that a hand may be pinched at the thin-film pressure sensor. If the change value is less than the preset threshold, it is determined that the pressure change at the thin-film pressure sensor may be due to factors such as the user gripping the anti-collision strip or the user leaning on it, but it is still within the normal range and there is no abnormality, i.e., no hand is pinched.

[0108] As an alternative to this embodiment, please refer to Figure 9 Step S200 specifically includes:

[0109] Step S210: Determine whether at least one of the at least two real-time voltage signals is greater than the critical threshold for pinching the hand.

[0110] Step S220: If at least one real-time voltage signal is greater than the hand-clamping critical threshold, it is determined that a hand is clamped, and the door is controlled to move to the open position.

[0111] Specifically, in this embodiment, at the i-th moment, after the controller acquires the real-time voltage signal of each thin-film pressure sensor, the controller compares each acquired real-time voltage signal with the clamping threshold to determine its magnitude. Whether it is true or not. Among them, Let be the real-time voltage signal of the j-th thin-film pressure sensor at time i. This is the critical threshold for hand pinching.

[0112] The critical threshold for hand pinching can be pre-configured and stored in the controller by the manufacturer. Understandably, this critical threshold can be determined by the actual voltage signal from the thin-film pressure sensor collected during simulated hand pinching tests conducted by the manufacturer on the automatic door's door body, sides, and side frame.

[0113] Therefore, if at least one real-time voltage signal exceeds the pinch threshold, it can be considered that the voltage value at at least one membrane pressure sensor has significantly exceeded the voltage range under normal use, thus confirming a possible pinch situation. Of course, it is understood that "pinching" here includes, but is not limited to, pinching a hand, pinching a pet's tail, or pinching a cleaning tool such as a broom. Furthermore, it is understood that there are multiple membrane pressure sensors spaced apart along the height of the door, and a pinch situation could occur at any of them. For example, for an adult, the pinch might be at the upper membrane pressure sensor, while for an infant or pet, it might be at the lower membrane pressure sensor, or in the case of pinching a foreign object, it could occur at any membrane pressure sensor. Therefore, at any given time, as long as at least one real-time voltage signal from all membrane pressure sensors exceeds the pinch threshold, a pinch situation can be confirmed.

[0114] Once it is determined that a hand is trapped in the automatic door, the controller can open the door to the open position, thereby separating the door's mating side from the corresponding side frame to eliminate the trapped hand, ensure the user's personal safety, and ensure the normal use of the automatic door.

[0115] Based on the above embodiments, a second embodiment of the automatic door anti-pinch detection method of this application is proposed. (See attached document) Figure 10 , Figure 10 This is a flowchart illustrating the second embodiment of the automatic door anti-pinch detection method.

[0116] It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.

[0117] In this embodiment, step S210 specifically includes:

[0118] Step S211: Amplify the real-time voltage signal to obtain an amplified detection signal.

[0119] Step S212: Determine whether at least one of the at least two amplified detection signals is greater than the critical threshold for pinching the hand.

[0120] Specifically, since the voltage value of the real-time voltage information of the thin-film pressure sensor 40 is relatively small, this embodiment uses the real-time voltage signal of the thin-film pressure sensor 40. Amplification processing is performed to obtain the amplified detection signal. The controller will amplify the detection signal. and the critical threshold of pinching When comparing, When the controller determines that a hand is caught, that is, there is a foreign object such as a hand between the mating side 21 and the corresponding side frame 12, in order to avoid a dangerous situation, the controller immediately controls the drive assembly 50 to drive the door 20 to open.

[0121] In this embodiment, the real-time voltage signal output by the thin-film pressure sensor 40 is amplified to improve the accuracy of the judgment.

[0122] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An automatic door, characterized in that, For use in a shower room, the automatic door includes: Door frame; A door body, which is movably disposed on the door frame between a closed position and an open position, and the door body has a mating side that can be separably engaged with the door frame. When the door body is in the closed position, the mating side is connected to the door frame. A crash barrier strip, which covers the mating side; A flexible circuit board, wherein the flexible circuit board is disposed between the anti-collision strip and the mating side, and extends along the length direction of the mating side; and At least two thin-film pressure sensors are soldered to each other at intervals along the length direction on the side of the flexible circuit board away from the mating side, and all the thin-film pressure sensors are electrically connected to the flexible circuit board. The thin-film pressure sensors are used to detect whether a hand is pinched. The automatic door also includes: At least two voltage conversion modules are connected to the flexible circuit board and are used to receive the real-time voltage signal output by the corresponding thin-film pressure sensor and amplify the real-time voltage signal to obtain an amplified detection signal. The voltage conversion module includes: A balancing resistor, one end of which is connected to the flexible circuit board; An operational amplifier, wherein the non-inverting input terminal of the operational amplifier is connected to the other end of the balancing resistor, and the output terminal of the operational amplifier is connected to the controller; A reverse resistor, one end of which is connected to the inverting input terminal of the operational amplifier, and the other end of which is grounded; An adjustable potentiometer, one end of which is connected to the inverting input terminal and one end of the inverting resistor, and the other end of which is connected to the output terminal and the controller. The adjustable potentiometers of the voltage conversion modules corresponding to different thin-film pressure sensors have different resistance values, so that the amplification factors of the different voltage conversion modules are different.

2. The automatic door according to claim 1, characterized in that, A portion of the sidewall of the flexible circuit board is attached to the anti-collision strip.

3. The automatic door according to claim 1 or 2, characterized in that, The flexible circuit board includes connecting portions and mounting portions that are alternately arranged in sequence along the length direction. The number of mounting portions is the same as the number of thin-film pressure sensors and corresponds one-to-one. Both sides of the mounting portion protrude from the two sides of the connecting portion. The thin-film pressure sensor is soldered to the side of the mounting portion away from the mating side.

4. The automatic door according to claim 1, characterized in that, The automatic door also includes: A drive assembly, connected to the door body, is used to drive the door body to move between the open position and the closed position; The controller is connected to the drive component and the voltage conversion module respectively, and is used to determine whether at least one of the at least two amplified detection signals is greater than the pinch threshold. If at least one of the amplified detection signals is greater than the pinch threshold, the controller controls the drive component to drive the door to open.

5. The automatic door according to claim 4, characterized in that, The automatic door also includes: A signal input unit is connected to the flexible circuit board, and the signal input unit has at least two first interfaces, each of which is connected to a corresponding balancing resistor. The signal output unit has at least two second interfaces, which are connected to the output terminals of the corresponding operational amplifiers.

6. An electric shower room, characterized in that, Including the automatic door as described in any one of claims 1 to 5.

7. A method for detecting anti-pinch fingers on automatic doors, characterized in that, An automatic door for use in a shower room, the automatic door comprising: Door frame; A door body, which is movably disposed on the door frame between a closed position and an open position, and the door body has a mating side that can be separably engaged with the door frame. When the door body is in the closed position, the mating side is connected to the door frame. A crash barrier strip, which covers the mating side; A flexible circuit board, wherein the flexible circuit board is disposed between the anti-collision strip and the mating side, and extends along the length direction of the mating side; and At least two thin-film pressure sensors are soldered to each other at intervals along the length direction on the side of the flexible circuit board away from the mating side, and all the thin-film pressure sensors are electrically connected to the flexible circuit board. The thin-film pressure sensors are used to detect whether a hand is pinched. The automatic door also includes: At least two voltage conversion modules are connected to the flexible circuit board and are used to receive the real-time voltage signal output by the corresponding thin-film pressure sensor and amplify the real-time voltage signal to obtain an amplified detection signal. The voltage conversion module includes: A balancing resistor, one end of which is connected to the flexible circuit board; An operational amplifier, wherein the non-inverting input terminal of the operational amplifier is connected to the other end of the balancing resistor, and the output terminal of the operational amplifier is connected to the controller; A reverse resistor, one end of which is connected to the inverting input terminal of the operational amplifier, and the other end of which is grounded; An adjustable potentiometer, one end of which is connected to the inverting input terminal and one end of the inverting resistor, and the other end of which is connected to the output terminal and the controller. The adjustable potentiometers of the voltage conversion modules corresponding to different thin-film pressure sensors have different resistance values, so that the amplification factors of the different voltage conversion modules are different. The method includes: Acquire the real-time voltage signals detected by at least two thin-film pressure sensors; Based on the real-time voltage signal, determine whether a hand is pinched.

8. The automatic door anti-pinch detection method according to claim 7, characterized in that, The step of determining whether a hand is pinched based on the real-time voltage signal includes: Determine whether at least one of the at least two real-time voltage signals is greater than the hand-clamping critical threshold; If at least one of the real-time voltage signals is greater than the pinch threshold, a pinch situation is determined, and the door is controlled to move to the open position.

9. The automatic door anti-pinch detection method according to claim 8, characterized in that, The determination of whether at least one of the at least two real-time voltage signals is greater than the pinch threshold includes: The real-time voltage signal is amplified to obtain an amplified detection signal; Determine whether at least one of the at least two amplified detection signals is greater than the hand-clamping threshold.

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