JP7211480B1 - elevator control panel - Google Patents

Abstract

A control panel and a door device for an elevator capable of suppressing deterioration in detection accuracy are provided. An elevator control panel includes a detector and a first transmitter having a first detection surface for transmitting a detection signal indicative of a change in capacitance due to an object approaching the first detection surface. an operation button; and a first signal line electrically connected to the first transmitter and the detector for transmitting a detection signal from the first transmitter to the detector, the first transmitter transmitting the detection signal The detector transmits an electric signal with a voltage value that changes according to the amount of change in capacitance, and the detector includes an amplifier that amplifies the voltage value of the detection signal received from the first signal line, and the amplifier that amplifies the voltage value of the detection signal. a detection unit that detects that an object has approached the first detection surface when it is determined that the voltage value of the detection signal is greater than a prescribed threshold value. [Selection drawing] Fig. 3

Description

The present disclosure relates to an elevator control panel.

Patent Literature 1 discloses an elevator system. The elevator system is provided with a sensor that detects a change in capacitance as an operation button. According to the elevator system, the user can operate the button without contacting the sensor.

JP 2013-124166 A

However, in the sensor described in Patent Literature 1, the change in capacitance is transmitted to a portion that detects the change by an electrical signal having a voltage corresponding to the amount of change. At this time, the voltage of the electrical signal is lowered by transmitting the electrical signal through the signal line. Therefore, the detection accuracy of the sensor is lowered.

The present disclosure has been made to solve the above problems. An object of the present disclosure is to provide an elevator operation panel capable of suppressing deterioration in detection accuracy.

An elevator control panel according to the present disclosure includes a detector and a first transmitter that has a first detection surface and that transmits a detection signal indicating a change in capacitance caused by an object approaching the first detection surface. a first signal line electrically connected to an operation button, a first transmitter and a detector for transmitting a detection signal transmitted by the first transmitter to the detector; and a second detection surface. 2 a second operation button including a second transmitter that transmits a detection signal indicating a change in capacitance due to an object approaching the detection surface; and a second transmitter having a length different from that of the first signal line. a second signal line connected to the detector and transmitting a detection signal emitted by the second oscillator to the detector . The first oscillator and the second oscillator transmit , as detection signals, electric signals of voltage values that change corresponding to the amount of change in capacitance . The detector amplifies the voltage value of the detection signal received from the first signal line with a first amplification factor corresponding to the length of the first signal line, and amplifies the voltage value of the detection signal received from the first signal line with an amplification factor corresponding to the length of the second signal line. an amplifier for amplifying the voltage value of the detection signal received from the second signal line with a second amplification factor having a value different from the value of the first amplification factor; and the detection signal from the first signal line amplified by the amplifier. When it is determined that the voltage value of is greater than a prescribed threshold value, it is detected that an object has approached the first detection surface, and the voltage value of the detection signal from the second signal line amplified by the amplification unit is greater than the threshold value and a detection unit that detects that an object has approached the second detection surface when it is determined that the object is close to the second detection surface .

According to the present disclosure, the amplifier amplifies the voltage value of the detection signal. The detection unit detects that an object has approached the detection surface when it determines that the voltage value of the amplified detection signal is greater than a specified threshold. Therefore, it is possible to suppress deterioration in detection accuracy.

FIG. 2 is an exploded perspective view of the operating panel of the elevator according to Embodiment 1; 4 is a plan view of the back surface of the faceplate included in the control panel of the elevator according to Embodiment 1. FIG. 1 is a block diagram of an elevator control panel according to Embodiment 1. FIG. 4 is a diagram showing the relationship between the amplification factor of the detection signal amplified by the control panel of the elevator and the length of the signal line in Embodiment 1. FIG. FIG. 4 is a diagram showing the relationship between the detected distance of the control panel of the elevator and the length of the signal line in Embodiment 1; FIG. 10 is a plan view of the elevator door device according to Embodiment 2; FIG. 4 is a block diagram of an elevator door device according to Embodiment 2;

Embodiments for carrying out the present disclosure will be described with reference to the accompanying drawings. In addition, the same code|symbol is attached|subjected to the part which is the same or corresponds in each figure. Redundant description of the relevant part will be simplified or omitted as appropriate.

Embodiment 1.
FIG. 1 is an exploded perspective view of an elevator control panel according to Embodiment 1. FIG. FIG. 2 is a plan view of the back surface of the face plate of the elevator control panel according to Embodiment 1. FIG.

In the elevator system shown in FIG. 1, for example, a control panel 1 is provided inside a car (not shown). Also, the operation panel 1 may be provided at a hall (not shown). For example, the operation panel 1 receives an input of a destination floor from a user by operating an operation button. The operation panel 1 transmits the received destination floor information to a control panel (not shown). An operation panel 1 includes a box 2, a faceplate 3 and a plurality of touchless buttons 4.

For example, the box 2 is formed in a rectangular parallelepiped shape with one side open. The box 2 is embedded in the side of the car with the open side facing the inside of the car. A face plate 3 is provided so as to cover the open surface of the box 2 . The surface of the face plate 3 is provided with a plurality of buttonholes 3a.

A plurality of touchless buttons 4 are provided at the positions of the plurality of button holes 3a as operation buttons. A plurality of touchless buttons 4 each have the same configuration. The touchless button 4 has a detection surface. The detection surface of the touchless button 4 faces the inside of the car at the plurality of buttonholes 3a. The touchless button 4 is a button for detecting an object existing in a range closer than the detection range from the detection surface. The touchless button 4 detects changes in capacitance due to the presence of the object.

As shown in FIG. 2, a plurality of touchless buttons 4, a mounting plate 6, and a detector 7 are attached to the back surface of the faceplate 3. As shown in FIG. A plurality of signal lines 8 are arranged on the back side of the faceplate 3 .

The touchless button 4 includes a transmitter 5 and a lighting device (not shown).

Although not shown in FIG. 2 , the transmitter 5 has a detection surface 5 s as a detection surface of the touchless button 4 . Note that the detection surface 5s is shown in FIG. 1, not in FIG. The transmitter 5 transmits a detection signal, which is an electrical signal with a voltage value that changes according to the amount of change in capacitance.

Specifically, the transmitter 5 has a pair of electrodes (not shown). A pair of electrodes are spaced apart from each other. A reference voltage is applied to the pair of electrodes. The value of the reference voltage is determined by the reference capacitance between the pair of electrodes. When an object exists in the vicinity of the detection surface 5s, the capacitance between the pair of electrodes increases or decreases, thereby changing from the reference capacitance. Due to the change in capacitance, the value of the voltage applied to the pair of electrodes changes from the value of the reference voltage. For example, the voltage of the detection signal is the voltage applied to the pair of electrodes. When the voltage value changes, the voltage value indicated by the detection signal changes from the reference voltage value. That is, the voltage value of the detection signal changes according to the amount of change in capacitance between the pair of electrodes.

For example, the lights are LEDs. The lighting device lights up when it receives a lighting command or when an electric current is passed through it.

The mounting plate 6 is fixed to the back surface of the faceplate 3 . The mounting plate 6 mounts the plurality of touchless buttons 4 at corresponding positions.

For example, the detector 7 is a substrate with multiple circuits. A detector 7 is fixed to the back surface of the faceplate 3 . For example, the detector 7 is positioned below the mounting plate 6 behind the faceplate 3 . The detector 7 creates destination floor information based on the detection signal, and transmits the created information to the control panel.

The plurality of signal lines 8 are conductors capable of transmitting electrical signals. One ends of the plurality of signal lines 8 are connected to transmitters 5 of the plurality of touchless buttons 4, respectively. Each of the other ends of the multiple signal lines 8 is connected to the detector 7 .

For the purpose of reducing extra wiring length, the lengths of the plurality of signal lines 8 are different according to the distance from the touchless button 4 to the detector 7 respectively. FIG. 2 shows a signal line 8a and a signal line 8b as a first signal line and a second signal line among the plurality of signal lines 8. As shown in FIG. A signal line 8 a connects the touchless button 4 a , which is the first operation button farthest from the detector 7 , and the detector 7 . A signal line 8 b connects the touchless button 4 b , which is the second operation button closest to the detector 7 , and the detector 7 . The length of the signal line 8a is longer than the length of the signal line 8b.

Detector 7 receives a detection signal from transmitter 5 via signal line 8 . The detector 7 detects that the touchless button 4 has been operated based on the detection signal. In this case, the detector 7 creates information on the destination floor corresponding to the touchless button 4 and transmits it to the control panel. Further, the detector 7 lights the lighting device corresponding to the touchless button 4 as a registration operation.

Next, the detector 7 will be explained using FIG.
FIG. 3 is a block diagram of the control panel of the elevator according to Embodiment 1. FIG. Note that FIG. 3 shows touchless buttons 4 a and 4 b as the first and second operation buttons of the plurality of touchless buttons 4 . A transmitter 5a and a transmitter 5b are shown as the first transmitter and the second transmitter of the plurality of transmitters 5. FIG. Of the plurality of signal lines 8, signal lines 8a and 8b are shown. Although not shown, the transmitter 5a has a detection surface 5s that is a first detection surface. The transmitter 5b has a detection surface 5s, which is the second detection surface.

As shown in FIG. 3, the detector 7 comprises a detection section 9 and an amplification section 10 .

The detection unit 9 can identify the touchless button 4 that has transmitted the detection signal. The detection unit 9 detects that an object has approached the detection surface 5s (not shown in FIG. 3) when the voltage value of the received detection signal is greater than a specified voltage threshold. When the detection unit 9 detects that an object approaches the detection surface 5s, the detection unit 9 specifies the destination floor to which the detection signal corresponds. The detection unit 9 creates information on the specified destination floor. The detector 9 transmits the destination floor information to the control panel. At this time, the detection unit 9 lights the lighting device of the touchless button 4 that has transmitted the detection signal.

The amplification section 10 is provided between the plurality of signal lines 8 and the detection section 9 . The amplifier 10 receives the detection signal from the signal line 8 . The amplifier 10 amplifies the voltage of the detection signal received from the signal line 8 with an amplification factor corresponding to the length of the signal line 8 . Amplification indicates the ratio of amplification from the original voltage. For example, the amplification factor is set in advance when the operation panel 1 is installed. The amplification section 10 can individually set the amplification factor corresponding to each of the plurality of signal lines 8 . The amplifying unit 10 transmits the voltage-amplified detection signal to the detecting unit 9 . At this time, the amplification unit 10 transmits the detection signal to the detection unit 9 while maintaining the corresponding relationship between the detection signal and the signal line 8 .

At least one of the detection section 9 and the amplification section 10 is realized by a processing circuit on the substrate included in the detector 7 . The processing circuitry may comprise at least one processor and at least one memory. In this case, for example, the processor reads a program stored in memory. The function of the detection unit 9 or the function of the amplification unit 10 may be realized by a processor executing the program.

For example, a change in capacitance occurs in the detection range of the transmitter 5a of the touchless button 4a. Transmitter 5a transmits a detection signal indicating the amount of change in capacitance to amplifier 10 via signal line 8a. The amplifier 10 amplifies the voltage of the detection signal with a first amplification factor corresponding to the length of the signal line 8a. The amplifier 10 transmits the amplified detection signal to the detector 9 . The detection unit 9 determines whether the voltage value of the detection signal received from the amplification unit 10 is greater than the voltage threshold. When determining that the voltage value of the detection signal is greater than the voltage threshold, the detection unit 9 identifies the touchless button 4a corresponding to the detection signal, and creates information on the destination floor indicated by the touchless button 4a. Also, the lighting device of the touchless button 4a is turned on.

When receiving the detection signal from the touchless button 4b, the amplifier 10 similarly amplifies the voltage of the detection signal with a second amplification factor corresponding to the length of the signal line 8b.

Next, the function of the amplifier section 10 will be described with reference to FIGS. 4 and 5. FIG.
FIG. 4 is a diagram showing the relationship between the amplification factor of the detection signal amplified by the control panel of the elevator and the length of the signal line according to the first embodiment. FIG. 5 is a diagram showing the relationship between the detected distance of the control panel of the elevator and the length of the signal line in the first embodiment.

FIG. 4 shows a graph representing the relationship between the length of the signal line 8 and the voltage amplification factor. The horizontal axis is the length of the signal line 8 . The unit of length of the signal line 8 is (mm). The vertical axis represents the amplification factor of the voltage amplified by the amplifier 10 . The unit of amplification factor is (%). The longer the signal line 8 is, the larger the amplification factor is set.

FIG. 5 shows a graph representing the relationship between the length of the signal line 8 and the detection distance of the transmitter 5 . The horizontal axis is the length of the signal line 8 . The vertical axis is the detection distance of the transmitter 5 . The detection distance is the maximum distance that can be detected by the transmitter 5 and the detector 7 from the detection surface of the transmitter 5 to the target object. For example, the object is assumed to be a human finger. When the detection unit 9 determines that the voltage value of the detection signal transmitted by the transmitter 5 is greater than the voltage threshold, it is considered to be detectable.

Points indicated by triangles are actual values when the amplification unit 10 does not amplify the voltage of the detection signal. A graph X indicated by a dashed line is a graph showing trends in changes in actual values when the amplification unit 10 does not amplify the voltage of the detection signal.

When the amplifier 10 does not amplify the voltage of the detection signal, the detection distance becomes shorter as the length of the signal line 8 becomes longer. This is because the internal resistance of the signal line 8 reduces the voltage value of the detection signal. As the length of the signal line 8 increases, the amount of decrease in the voltage value of the detection signal increases. For example, when the transmitter 5 transmits a detection signal with a voltage value exceeding the reference voltage value due to a change in the capacitance, the voltage value drop caused by the signal line 8 causes the detection signal to be reduced. The indicated voltage value may be below the reference voltage value.

The points indicated by circles are actual values when the amplifier 10 amplifies the voltage of the detection signal according to the length of the signal line 8 . A graph Y indicated by a solid line is a graph showing trends in changes in actual values when the amplification unit 10 amplifies the voltage of the detection signal.

When the amplifier 10 amplifies the voltage of the detection signal, the detection distance is substantially the same distance regardless of the length of the signal line 8 . This is because the voltage of the detection signal is amplified by the amount of voltage drop caused by the signal line 8 . For example, the amplification factor is set so that all the touchless buttons 4 have the same detection distance.

4 and 5 merely show an example of measured values, and the specific numerical values of the length of the signal line 8, the amplification factor, and the detection distance are not limited to the numerical values shown in FIGS. 4 and 5. .

According to Embodiment 1 described above, the operation panel 1 includes the first operation buttons including the transmitter 5 as the first transmitter, the detector 7, and the signal line 8 as the first signal line. The detector 7 includes a detection section 9 and an amplification section 10 . The amplification unit 10 amplifies the voltage of the detection signal and then transmits it to the detection unit 9 . The detection unit 9 detects that an object has approached when the voltage value of the detection signal is greater than a specified threshold. Generally, in a sensor that detects changes in capacitance, the amount of change in capacitance is small. Even if a change in capacitance with an amount of change exceeding the threshold value, which is a change in capacitance that should be detected, occurs, the voltage drop during transmission through the signal line may cause the detection unit 9 to detect The change may not be detected. That is, the detection accuracy of the sensor composed of the transmitter 5, the detector 7 and the signal line 8 may deteriorate. According to the operation panel 1 of the present embodiment, the voltage of the detection signal that has dropped while being transmitted through the signal line 8 can be restored by electrical amplification. Therefore, it is possible to suppress the deterioration of the detection accuracy of the sensor. As a result, for example, in the touchless button 4, narrowing of the detection distance and detection range can be suppressed.

Note that the operation panel 1 may be a touch button having a transmitter 5 instead of the touchless button 4 . In this case, the touch button is a button that detects a change in capacitance like the touchless button 4 . A touch button is activated by touching a part of a person's body. Even in the case of a touch button, a drop in voltage value due to the length of the signal line 8 is suppressed, so a drop in button detection accuracy can be suppressed.

Also, the amplifier 10 of the detector 7 amplifies the voltage of the detection signal with a first amplification factor corresponding to the length of the signal line 8 . Therefore, the voltage of the detection signal can be amplified according to the length of the signal line 8 when it is actually wired.

Further, the amplifier 10 of the detector 7 amplifies the voltage of the detection signal with different amplification factors depending on the length difference between the first signal line and the second signal line. Generally, when the control panel 1 is installed, conditions such as the number of floors on which the car stops and the positions of buttons, which are the desired conditions at the time of ordering, differ for each elevator system. On the other hand, the space inside the operation panel 1 is defined to some extent. Also, the space is relatively narrow. Therefore, there are many restrictions when determining the arrangement of devices to be installed inside the operation panel 1 . For example, the position where the detector 7 is installed is constrained by the positions of other equipment. Therefore, the lengths of the plurality of signal lines 8 are different. In the present embodiment, the amplification section 10 can set amplification factors corresponding to the signal lines 8 having different lengths. As a result, it is possible to suppress deterioration in the detection accuracy of the sensor while ensuring the degree of freedom in the actual layout. In addition, variations in the detection ranges of the touchless buttons 4 can be suppressed.

Embodiment 2.
FIG. 6 is a plan view of an elevator door device according to Embodiment 2. FIG. In addition, in Embodiment 2, the same code|symbol is attached|subjected to the part which is the same as that of Embodiment 1, or an equivalent part. Description of this part is omitted.

In the elevator system shown in FIG. 6, the door device 20 is provided in the car. For example, the door device 20 is a left-right opening type door. The door device 20 includes a pair of door panels 21 a and 21 b, a driver 22 , a controller 23 , a plurality of transmitters 5 , a detector 7 and a plurality of signal lines 8 .

A pair of door panels 21a and 21b are provided at the doorway of the car, respectively. Although details are not shown, the pair of door panels 21a and 21b receive force from the driving machine 22 to open and close in the directions of arrows D1 and D2, respectively. A controller 23 is provided at the top of the car. The controller 23 controls the opening/closing state of the door panels 21 a and 21 b by controlling the operation of the driving machine 22 .

A plurality of transmitters 5 in the second embodiment have substantially the same configuration as the transmitters 5 in the first embodiment. The detection surfaces 5s of the plurality of transmitters 5 in the second embodiment may be wider than the detection surfaces 5s of the transmitters 5 in the first embodiment.

A plurality of transmitters 5 are provided on a pair of door panels 21a and 21b as touchless sensors. Some of the plurality of transmitters 5 are provided on the surface of the door panel 21a facing the inside of the car. The transmitter 5a, which is the first transmitter among the plurality of transmitters 5, is provided below the door panel 21a. The remaining transmitters 5 among the plurality of transmitters 5 are provided on the surface of the door panel 21b facing the inside of the car. The transmitter 5b, which is the second transmitter among the plurality of transmitters 5, is provided on the upper portion of the door panel 21b. Each of the detection surfaces 5s of the plurality of transmitters 5 faces the inside of the car.

Detector 7 in the second embodiment has substantially the same configuration as detector 7 in the first embodiment. A detector 7 is provided at the top of the car. For example, the detector 7 is provided above the door panel 21b. Detector 7 is electrically connected to controller 23 .

A plurality of signal lines 8 in the second embodiment have substantially the same configuration as the signal lines 8 in the first embodiment. The lengths of the plurality of signal lines 8 are different depending on the distance from the transmitter 5 to the detector 7 . FIG. 6 shows a signal line 8a and a signal line 8b as a first signal line and a second signal line among the plurality of signal lines 8, respectively. A signal line 8 a connects the transmitter 5 a and the detector 7 . A signal line 8 b connects the transmitter 5 b and the detector 7 . The length of the signal line 8a is longer than the length of the signal line 8b.

In Embodiment 2, multiple transmitters 5 and detectors 7 function as a safety device for door device 20 . When the car arrives at the landing, the controller 23 opens the closed pair of door panels 21a and 21b via the driving machine 22. As shown in FIG. At this time, if an item belonging to a person inside the car is present near the door panel 21a, the item may be caught in the gap between the opened door panel 21a and the car. In order to suppress entanglement, when an object exists near the pair of door panels 21a and 21b, the transmitter 5 transmits a detection signal indicating a change in capacitance caused by the object. Based on the detection signal, the detector 7 transmits to the controller 23 a signal indicating that the object has approached the detection surface 5s. When the controller 23 receives the signal from the detector 7, it stops opening the door panels 21a and 21b.

Next, the detector 7 according to Embodiment 2 will be described with reference to FIG.
FIG. 7 is a block diagram of an elevator door device according to the second embodiment. 7 shows a transmitter 5a and a transmitter 5b out of the plurality of transmitters 5. As shown in FIG. FIG. 7 shows signal lines 8a and 8b of the plurality of signal lines 8. FIG.

As shown in FIG. 7, in the second embodiment, the detector 7 includes a detection section 9 and an amplification section 10 substantially similar to those in the first embodiment.

When a capacitance change occurs in the transmitter 5, the transmitter 5 transmits a detection signal. The detection unit 9 detects that an object has approached the detection surface 5s when the value of the voltage indicated by the received detection signal is greater than a specified voltage threshold. The voltage threshold is set based on the safe distance between the door panels 21a, 21b and objects. In this case, the detector 9 transmits to the controller 23 a signal indicating that the object has approached the detection surface 5s.

The amplifier 10 amplifies the voltage of the detection signal received from the signal line 8 with an amplification factor corresponding to the length of the signal line 8 . The amplifying unit 10 transmits the voltage-amplified detection signal to the detecting unit 9 .

According to the second embodiment described above, door device 20 includes transmitter 5 , detector 7 , controller 23 and signal line 8 . According to the door device 20 of the present embodiment, it is possible to restore the voltage of the detection signal that has dropped while being transmitted through the signal line 8 . Therefore, it is possible to prevent the detection accuracy of the touchless sensor including the transmitter 5, the detector 7, and the signal line 8 from deteriorating. As a result, for example, in a touchless sensor, narrowing of the detection distance and detection range can be suppressed.

Note that the transmitter 5 may be provided on the pair of door panels 21a and 21b as a touch sensor instead of as a touchless sensor. In this case, the touch sensor becomes a sensor that detects changes in capacitance, like the touchless sensor. The touch sensor operates when an object touches the detection surface 5s. Even in the case of a touch sensor, since the voltage drop caused by the length of the signal line 8 is suppressed, the detection accuracy of the sensor can be improved.

Further, the amplifier 10 of the detector 7 amplifies the voltage of the detection signal with different amplification factors depending on the length difference between the first signal line and the second signal line. In general, when the door device 20 is installed, conditions such as the structure of the building, the structure of the car, and the arrangement position of the door, which is the desired condition at the time of ordering, differ for each elevator system. On the other hand, the space configured by the door device 20 is defined to some extent. Also, the space is relatively narrow. Therefore, for example, there are many restrictions when determining the wiring of the signal line 8 . Therefore, the lengths of the plurality of signal lines 8 are different. In the present embodiment, the amplification section 10 can set amplification factors corresponding to the signal lines 8 having different lengths. As a result, it is possible to suppress deterioration in the detection accuracy of the sensor while ensuring the degree of freedom in the actual layout. Moreover, it is possible to suppress variation in the detection ranges of the plurality of touchless sensors.

The touchless sensor in Embodiment 2 may be applied to a landing door as a door device. In this case, the detector 7 may send a signal to the control panel to detect that an object has approached the detection surface 5s. The control panel may stop the opening/closing operation of the door device based on the signal.

1 Operation panel 2 Box 3 Face plate 3a Button hole 4 Touchless button 4a, 4b Touchless button 5, 5a, 5b Transmitter 5s Detection surface 6 Mounting plate 7 Detector 8, 8a , 8b signal line 9 detector 10 amplifier 20 door device 21a, 21b door panel 22 driver 23 controller

Claims (3)

a detector;
a first operation button having a first detection surface and including a first transmitter for transmitting a detection signal indicating a change in capacitance due to an object approaching the first detection surface;
a first signal line electrically connected to the first oscillator and the detector and transmitting a detection signal emitted by the first oscillator to the detector;
a second operation button having a second detection surface and including a second transmitter for transmitting a detection signal indicating a change in capacitance due to an object approaching the second detection surface;
A second signal line having a length different from that of the first signal line, connected to the second oscillator and the detector, and transmitting a detection signal emitted by the second oscillator to the detector. When,
with
The first oscillator and the second oscillator transmit, as a detection signal, an electric signal having a voltage value that changes corresponding to the amount of change in capacitance,
The detector is
The voltage value of the detection signal received from the first signal line is amplified with a first amplification factor corresponding to the length of the first signal line, and the amplification factor corresponding to the length of the second signal line is the an amplifier that amplifies the voltage value of the detection signal received from the second signal line with a second amplification factor having a value different from the value of the first amplification factor ;
detecting that an object has approached the first detection surface when the voltage value of the detection signal from the first signal line amplified by the amplification unit is determined to be greater than a prescribed threshold value , and the amplification unit amplifies a detection unit that detects that an object has approached the second detection surface when it is determined that the voltage value of the detection signal from the second signal line is larger than the threshold value ;
Elevator control panel with 2. The elevator operating panel according to claim 1, wherein said first operating button is a touch button or a touchless button. The first signal line is longer than the second signal line,
3. The elevator control panel according to claim 1 , wherein said first amplification factor is greater than said second amplification factor .

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