Signal strengthening plate for elevator and communication system outside elevator hall

Abstract

The invention relates to a signal strengthening plate for an elevator and a communication system outside an elevator hall. According to the signal enhancement plate, through the first communication module, the first analog-to-digital conversion module, the first enabling module, the first digital-to-analog conversion module, the second communication module, the second analog-to-digital conversion module, the second enabling module and the second digital-to-analog conversion module, one-way communication of signals can be ensured, conflict and interference of two-way communication are avoided, input signals can be enhanced, and the signal enhancement effect is improved. And real-time response control is realized, so that the communication quality and the communication real-time performance are guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of elevator hall communication, and particularly to a signal strengthening board for elevators and an elevator hall communication system. Background Art

[0002] Elevator hall communication systems can be divided into various communication methods according to the communication mode, such as dedicated communication methods and general communication methods. These communication methods basically use a one-to-many method for communication, that is, the elevator main control system and the communication terminals outside the hall on each floor are connected to the same group of communication lines to achieve data exchange between the elevator main control system and the communication terminals outside the hall on each floor.

[0003] In traditional technologies, relay boards are mostly used to transmit data in elevator shafts to achieve elevator hall communication. However, communicating through relay boards requires transmission and forwarding through multiple relay nodes, and each transmission and forwarding will introduce a certain signal delay, which in turn leads to a decrease in the communication signal bandwidth and reduces the real-time performance of the communication system. Summary of the Invention

[0004] Based on this, it is necessary to provide a signal strengthening board for elevators and an elevator hall communication system that can ensure communication quality and communication real-time performance in view of the above technical problems.

[0005] A signal strengthening board for elevators includes: a first communication module, a first analog-to-digital conversion module, a first enabling module, a first digital-to-analog conversion module, a second communication module, a second analog-to-digital conversion module, a second enabling module, and a second digital-to-analog conversion module;

[0006] The first communication module, the first analog-to-digital conversion module, and the second digital-to-analog conversion module are connected in series in sequence, and the output end of the second digital-to-analog conversion module is respectively connected to the second enabling module and the second communication module;

[0007] The second communication module, the second analog-to-digital conversion module, and the first digital-to-analog conversion module are connected in series in sequence, and the output end of the first digital-to-analog conversion module is respectively connected to the first enabling module and the first communication module;

[0008] The control end of the first enabling module is connected to the controlled end of the first analog-to-digital conversion module, and the control end of the second enabling module is connected to the controlled end of the second analog-to-digital conversion module, so that the first enabling module prohibits the first analog-to-digital conversion module from working when receiving the output signal of the first digital-to-analog conversion module, and the second enabling module prohibits the second analog-to-digital conversion module from working when receiving the output signal of the second digital-to-analog conversion module.

[0009] The above signal strengthening board can ensure unidirectional communication of signals through the first communication module, the first analog-to-digital conversion module, the first enabling module, the first digital-to-analog conversion module, the second communication module, the second analog-to-digital conversion module, the second enabling module, and the second digital-to-analog conversion module, avoid conflicts and interference of bidirectional communication, enhance the input signal, and achieve real-time response control, thereby ensuring communication quality and communication real-time performance.

[0010] In one embodiment, it further includes: The first enabling module is configured to, when receiving that the output signal of the first digital-to-analog conversion module is a first valid signal, prohibit the output of the first enabling signal within a first preset time to prohibit the first analog-to-digital conversion module from working;

[0011] The second enabling module is configured to, when receiving that the output signal of the second digital-to-analog conversion module is a second valid signal, prohibit the output of the second enabling signal within a second preset time to prohibit the second analog-to-digital conversion module from working;

[0012] Wherein, both the first valid signal and the second valid signal are signals inconsistent with the idle level of the communication bus.

[0013] In one embodiment, the first analog-to-digital conversion module includes:

[0014] A first triggering module, the input end of the first triggering module is connected to the output end of the first communication module, the controlled end of the first triggering module is connected to the control end of the first enabling module, and the first triggering module is configured to generate and output a first trigger signal when continuously receiving the first enabling signal and continuously receiving the output signal of the first communication module within a third preset time;

[0015] A first carrier module, the input end of the first carrier module is connected to the output end of the first triggering module, and the first carrier module is configured to generate a first pulse width modulation signal according to a preset baud rate when receiving the first trigger signal;

[0016] A first shaping module, the first input end of the first shaping module is connected to the first communication module, the second input end of the first shaping module is connected to the output end of the first carrier module, and the output end of the first shaping module is connected to the input end of the second digital-to-analog conversion module. The first shaping module is configured to generate a first digital signal according to the output signal of the first communication module and the first pulse width modulation signal.

[0017] In one embodiment, the second analog-to-digital conversion module includes:

[0018] A second trigger module, the input end of the second trigger module is connected to the output end of the second communication module, the controlled end of the second trigger module is connected to the control end of the second enabling module, and the second trigger module is used to generate and output a second trigger signal when continuously receiving the second enabling signal and continuously receiving the output signal of the second communication module for a fourth preset time;

[0019] A second carrier module, the input end of the second carrier module is connected to the output end of the second trigger module, and the second carrier module is used to generate a second pulse width modulation signal according to a preset baud rate when receiving the second trigger signal;

[0020] A second shaping module, the second input end of the second shaping module is connected to the second communication module, the first input end of the second shaping module is connected to the output end of the second carrier module, and the output end of the second shaping module is connected to the input end of the first digital-to-analog conversion module. The second shaping module is used to generate a second digital signal according to the output signal of the second communication module and the second pulse width modulation signal.

[0021] In one embodiment, the first carrier module is further used to be in a reset state when not receiving the first trigger signal.

[0022] In one embodiment, the second carrier module is further used to be in a reset state when not receiving the second trigger signal.

[0023] In one embodiment, the preset baud rate is the same as the baud rate of the input signal of the first communication module and the baud rate of the input signal of the second communication module.

[0024] In one embodiment, when the first carrier module is included, there is a first preset time difference between the edge of the first pulse width modulation signal and the edge of the output signal of the first communication module;

[0025] When the second carrier module is included, there is a second preset time difference between the edge of the second pulse width modulation signal and the edge of the output signal of the second communication module.

[0026] An elevator hall communication system, comprising:

[0027] A plurality of signal strengthening boards as described above, and the plurality of signal strengthening boards are connected in series at multiple levels;

[0028] A plurality of call boxes, the plurality of call boxes are connected in series through a communication bus on the series connection path of the plurality of signal strengthening boards; the plurality of call boxes are used to generate and send a ladder request signal to the communication bus;

[0029] The control cabinet is connected to the first-level signal strengthening board in the multi-level signal strengthening board through a communication bus. The control cabinet is used to receive the elevator request signal and generate an elevator response signal to the communication bus according to the elevator request signal.

[0030] In one of the embodiments, the above system further includes:

[0031] A motor, which is connected to the control cabinet. The motor drags the elevator car to move to the corresponding calling position according to the scheduling control signal. Among them, the scheduling control signal is a signal generated by the control cabinet according to the elevator response signal. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 One of the structural schematic diagrams of the signal strengthening board in one embodiment;

[0034] Figure 2 Another structural schematic diagram of the signal strengthening board in one embodiment;

[0035] Figure 3 The structural schematic diagram of the elevator system in one embodiment. Detailed Embodiments

[0036] To facilitate the understanding of the present application, the following will describe the present application more comprehensively with reference to the relevant drawings. Embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0038] It can be understood that the terms "first", "second", etc. used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0039] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In addition, for the "connection" in the following embodiments, if there is a transmission of electrical signals or data between the connected objects, it should be understood as "electrical connection", "communication connection", etc.

[0040] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / include" or "has" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0041] In one embodiment, as Figure 1 shown, there is provided a signal strengthening board for an elevator, including: a first communication module 102, a first analog-to-digital conversion module 104, a first enabling module 106, a first digital-to-analog conversion module 108, a second communication module 110, a second analog-to-digital conversion module 112, a second enabling module 114, and a second digital-to-analog conversion module 116.

[0042] The first communication module 102 performs signal processing on the input signal, such as differential processing, filtering, etc. Through these signal processes, the signal quality, the anti-interference ability of the signal, and the reliability of signal transmission can be improved, etc. The first communication module 102 may include two input / output terminals, where the two input / output terminals (such as Figure 1 the a terminal and the b terminal shown therein) are used to connect to external devices to receive signals input by the external devices or output signals to the external devices. Optionally, the first communication module 102 can perform differential processing on the input signal to suppress the common-mode noise introduced by power supply noise, transmission line interference, electromagnetic radiation, etc., and improve the anti-interference ability of the signal. Of course, in the first communication module 102, other signal processes can be performed on its input signal to specifically enhance certain performances of the input signal, which will not be elaborated herein.

[0043] Similarly, the specific function of the second communication module 110 is the same as that of the first communication module 102. The two input / output terminals of the second communication module 110 (such as Figure 1 the e terminal and the f terminal therein) are used to connect to external devices to access signals from the external devices or send signals to the external devices. For the specific implementation, reference can be made to the function realization of the first communication module 102 for understanding, which will not be elaborated herein.

[0044] The input end of the first analog-to-digital conversion module 104 is connected to the output end of the first communication module 102 (such as Figure 1At the C end shown in [figure], the first analog-to-digital conversion module 104 performs analog-to-digital conversion processing on the signal processed by the first communication module 102, converting the continuously varying analog signal into a discrete digital signal to obtain a digital signal with high precision, strong stability, and strong anti-interference ability. In addition, the digitized signal can save storage space and improve the speed of signal transmission and processing, making subsequent signal processing more efficient.

[0045] Similarly, the specific function of the second analog-to-digital conversion module 112 is the same as that of the first analog-to-digital conversion module 104. For details, please refer to the first analog-to-digital conversion module 104 and will not be elaborated here.

[0046] The output end of the first digital-to-analog conversion module 108 is connected to the input end of the first communication module 102 (such as Figure 1 the D end shown in [figure]). The first digital-to-analog conversion module 108 performs digital-to-analog conversion processing on the signal input to the first digital-to-analog conversion module 108, converting the discrete digital signal into a continuously varying analog signal to obtain an analog signal with strong compatibility and good real-time performance. The analog signal is a continuous signal that can be collected, processed, and transmitted in real time, so it has great advantages in system control and response.

[0047] Similarly, the specific function of the second digital-to-analog conversion module 116 is the same as that of the first digital-to-analog conversion module 108. For details, please refer to the first digital-to-analog conversion module 108 and will not be elaborated here.

[0048] The first communication module 102, the first analog-to-digital conversion module 104, and the second digital-to-analog conversion module 116 are connected in series in sequence, and the output end of the second digital-to-analog conversion module 116 is respectively connected to the input ends of the second enabling module 114 and the second communication module 110 (such as Figure 1 the H end shown in [figure]).

[0049] The output end of the first communication module 102 is connected to the input end of the first analog-to-digital conversion module 104. The first analog-to-digital conversion module 104 performs analog-to-digital conversion on the output signal of the first communication module 102 to obtain a digital signal with high precision, strong stability, and strong anti-interference ability. The second digital-to-analog conversion module 116 receives the digital signal output by the first analog-to-digital conversion module 104 and converts the digital signal into an analog signal. The second enabling module 114 can obtain the analog signal in real time and respond and control in real time according to the analog signal to improve the real-time performance of the signal strengthening board. The second communication module 110 receives the analog signal output by the second digital-to-analog conversion module 116 and performs signal processing such as differential processing on the analog signal to obtain and output the enhanced signal.

[0050] The second communication module 110, the second analog-to-digital conversion module 112, and the first digital-to-analog conversion module 108 are connected in series in sequence, and the output end of the first digital-to-analog conversion module 108 is respectively connected to the first enabling module 106 and the first communication module 102.

[0051] The output end of the second communication module 110 (such as Figure 1 the g terminal shown in) is connected to the input end of the second analog-to-digital conversion module 112. The second analog-to-digital conversion module 112 performs analog-to-digital conversion on the output signal of the second communication module 110 to obtain a digital signal with high precision, strong stability, and strong anti-interference ability. The first digital-to-analog conversion module 108 receives the digital signal output by the second analog-to-digital conversion module 112 and converts the digital signal into an analog signal. The first enabling module 106 can obtain the analog signal in real time and respond and control in real time according to the analog signal to improve the real-time performance of the signal enhancement board. The first communication module 102 receives the analog signal output by the first digital-to-analog conversion module 108 and performs signal processing such as differential processing on the analog signal to obtain and output an enhanced signal.

[0052] The control end of the first enabling module 106 is connected to the controlled end of the first analog-to-digital conversion module 104, and the control end of the second enabling module 114 is connected to the controlled end of the second analog-to-digital conversion module 112, so that when the first enabling module 106 receives the output signal of the first digital-to-analog conversion module 108, the first analog-to-digital conversion module 104 is prohibited from working, and when the second enabling module 114 receives the output signal of the second digital-to-analog conversion module 116, the second analog-to-digital conversion module 112 is prohibited from working.

[0053] The first enabling module 106 is used to enable the first analog-to-digital conversion module 104. When the first enabling module 106 receives the output signal of the first digital-to-analog conversion module 108, the first analog-to-digital conversion module 104 is prohibited from working. The second enabling module 114 is used to enable the second analog-to-digital conversion module 112. When the second enabling module 114 receives the output signal of the second digital-to-analog conversion module 116, the second analog-to-digital conversion module 112 is prohibited from working.

[0054] Through the first enabling module 106 and the second enabling module 114, it is possible to control the signal strengthening board such that at a certain signal transmission moment, only the signal transmission flow of "the first communication module 102 -> the first analog-to-digital conversion module 104 -> the second digital-to-analog conversion module 116 -> the second communication module 110" or "the second communication module 110 -> the second analog-to-digital conversion module 112 -> the first digital-to-analog conversion module 108 -> the first communication module 102" exists. That is, when transmitting signals from the first communication module 102 to the second communication module 110, it is prohibited to transmit signals from the second communication module 110 to the first communication module 102. Similarly, when transmitting signals from the second communication module 110 to the first communication module 102, it is prohibited to transmit signals from the first communication module 102 to the second communication module 110, so as to ensure unidirectional communication on the signal strengthening board, avoid conflicts and interference of bidirectional communication, and thus ensure communication quality and communication real-time performance.

[0055] The above-mentioned signal strengthening board can ensure unidirectional communication of signals, avoid conflicts and interference of bidirectional communication, enhance input signals, and achieve real-time response control through the first communication module 102, the first analog-to-digital conversion module 104, the first enabling module 106, the first digital-to-analog conversion module 108, the second communication module 110, the second analog-to-digital conversion module 112, the second enabling module 114, and the second digital-to-analog conversion module 116, thereby ensuring communication quality and communication real-time performance.

[0056] In one embodiment, the first enabling module 106 is configured to, when receiving that the output signal of the first digital-to-analog conversion module 108 is a first valid signal, prohibit the output of the first enabling signal within a first preset time to prohibit the first analog-to-digital conversion module 104 from working.

[0057] The first preset time is an arbitrary time period on the premise of maintaining communication without conflict. For example, the first preset time is greater than or equal to 9 pulse width times. Optionally, the first preset time can be the pulse width time of 10 consecutive input signals, can be the pulse width time of 20 consecutive input signals, or can be the pulse width time of other numbers of consecutive input signals. Specifically, the first preset time can be the pulse width time of 10 consecutive input signals of the first enabling module 106. Of course, the above examples are only for illustration and do not limit the specific setting of the first preset time. The first preset time can be set according to actual needs and will not be elaborated here.

[0058] By setting the first preset time, it is possible to avoid the mis-triggering of the first enabling signal, resulting in the first analog-to-digital conversion module 104 working at the wrong time, thereby causing signal conflicts and interference.

[0059] The second enabling module 114 is configured to, when receiving that the output signal of the second digital-to-analog conversion module 116 is a second valid signal, prohibit the output of the second enabling signal within a second preset time, so as to prohibit the second analog-to-digital conversion module 112 from operating.

[0060] Similar to the first preset time, the second preset time is an arbitrary time period on the premise of maintaining communication without conflict. For example, the second preset time is greater than or equal to 9 pulse widths. Optionally, the second preset time can be the pulse widths of 10 consecutive input signals, can be the pulse widths of 20 consecutive input signals, or can be the pulse widths of other numbers of consecutive input signals. Specifically, the second preset time can be the pulse widths of 10 consecutive input signals of the second enabling module 114. Of course, the above examples are only for illustration and do not limit the specific setting of the second preset time. The second preset time can be set according to actual needs and will not be elaborated here.

[0061] By setting the second preset time, it is possible to avoid the mis-triggering of the second enabling signal, resulting in the second analog-to-digital conversion module 112 operating at the wrong timing, thereby causing signal conflicts and interference.

[0062] Wherein, both the first valid signal and the second valid signal are signals inconsistent with the idle level of the communication bus.

[0063] The idle level refers to the level state of the signal when no information is being transmitted. When the signal is in the idle state, that is, when no information is being transmitted, the signal usually remains at a specific level state, which is called the idle level. The idle level can be set to a high level or a low level according to actual design and requirements and can be defined as the idle level. The idle level of the communication bus is the idle level of the signals input to the first communication module 102 and the second communication module 110. Optionally, the idle level of the communication bus can be set to a high level or a low level according to the design requirements of the actual circuit. Specifically, taking an elevator system as an example, the idle level of the communication bus of the elevator can be a high level. At this time, the first valid signal and the second valid signal are low levels. Of course, the above examples are only for illustration and do not limit the specific setting of the levels of the first valid signal and the second valid signal. The levels of the first valid signal and the second valid signal can be set according to actual needs and will not be elaborated here.

[0064] In one embodiment, as Figure 2 shown, the above-mentioned first analog-to-digital conversion module 104 includes a first trigger module 1042, a first carrier module 1044, and a first shaping module 1046.

[0065] Among them, the input end of the first trigger module 1042 is connected to the output end of the first communication module 102, and the controlled end of the first trigger module 1042 is connected to the control end of the first enable module 106. The first trigger module 1042 is used to generate and output a first trigger signal when continuously receiving the first enable signal and continuously receiving the output signal of the first communication module for a third preset time.

[0066] The third preset time is an arbitrary time period to ensure that the first shaping module 1046 can output a correct signal. For example, the third preset time is less than 1 pulse width time. Optionally, the third preset time can be 0.25 times the pulse width time of consecutive input signals, can be 0.5 times the pulse width time of consecutive input signals, or can be other numbers of consecutive input signal pulse width times, to ensure that the edge difference between the output signal of the first communication module 102 and the output signal of the first carrier module 1044 is less than 1 pulse width time, so as to ensure that the first shaping module 1046 can output a correct signal. Specifically, the third preset time can be 0.5 times the pulse width time of the output signal of the first communication module 102. Of course, the above examples are only for illustration and do not limit the specific setting of the third preset time, which can be set according to actual needs and will not be elaborated here.

[0067] The first trigger module 1042 can generate and output a first trigger signal when continuously receiving the first enable signal and continuously receiving the output signal of the first communication module for a third preset time, which can avoid the first enable signal from accidentally triggering the first trigger module 1042 to work, and improve the stability and reliability of the signal strengthening board. Specifically, when the first trigger module 1042 receives the first enable signal, the first trigger module 1042 can monitor its input signal in real time. After the input signal is different from the idle level of the communication bus and lasts for a period of time, the first trigger module 1042 generates a first trigger signal according to the input signal.

[0068] To ensure the real-time performance and reliability of the input signal, the above-mentioned duration can be 0.5 times the pulse width time of the output signal of the first communication module 102. Of course, it can also be set to other time values, and the specific setting can be determined according to the requirements of actual applications and will not be elaborated here. It should be noted that the smaller the setting of this duration, the more beneficial it is to improve the real-time performance of the signal strengthening board, and the larger the setting of this duration, the more beneficial it is to improve the anti-interference ability of the signal strengthening board.

[0069] Of course, to avoid the first trigger module 1042 continuously and erroneously generating the first trigger signal, the first trigger module 1042 also has the function of canceling the first trigger signal. Specifically, when the first trigger module 1042 receives the first enable signal, the first trigger module 1042 can monitor its input signal in real time. After the input signal is the same as the idle level of the communication bus and lasts for a period of time, the first trigger module 1042 can cancel the first trigger signal. To avoid the mis-cancellation of the first trigger signal, the above-mentioned duration can be the pulse width time of the output signals of 10 consecutive first communication modules 102. Of course, it can also be set to other time values, and the specific setting can be determined according to the requirements of actual applications, which will not be elaborated here.

[0070] The first trigger module 1042 can ensure the correctness of the signal reception timing, effectively avoid signal reflux, and thus improve the accuracy and reliability of the signal strengthening board.

[0071] The input end of the first carrier module 1044 is connected to the output end of the first trigger module 1042. The first carrier module 1044 is used to generate a first pulse width modulation signal according to a preset baud rate when receiving the first trigger signal.

[0072] The first pulse width modulation signal is a signal with a constant pulse frequency and adjustable pulse width.

[0073] The first input end of the first shaping module 1046 is connected to the first communication module 102, the second input end of the first shaping module 1046 is connected to the output end of the first carrier module 1044, and the output end of the first shaping module 1046 is connected to the input end of the second digital-to-analog conversion module 116. The first shaping module 1046 is used to generate a first digital signal according to the output signal of the first communication module 102 and the first pulse width modulation signal.

[0074] The first shaping module 1046 can generate a first digital signal according to the output signal of the first communication module 102 and the first pulse width modulation signal. Specifically, the first shaping module 1046 can sample the output signal of the first communication module 102 according to the first pulse width modulation signal. This sampling can be rising edge sampling or falling edge sampling, and the specific sampling method needs to be determined according to the requirements of actual applications.

[0075] Through the coordinated work of the first trigger module 1042, the first carrier module 1044, and the first shaping module 1046, a stable and reliable first digital signal can be generated when the first trigger module 1042 continuously receives the first enable signal and continuously receives the output signal of the first communication module for a third preset time.

[0076] In one embodiment, as Figure 2As shown, the second analog-to-digital conversion module 112 includes a second trigger module 1122, a second carrier module 1124, and a second shaping module 1126.

[0077] Among them, the input end of the second trigger module 1122 is connected to the output end of the second communication module 110, and the controlled end of the second trigger module 1122 is connected to the control end of the second enable module 114. The second trigger module 1122 is used to generate and output a second trigger signal when continuously receiving the second enable signal and continuously receiving the output signal of the second communication module for a fourth preset time.

[0078] Similar to the third preset time, the fourth preset time is an arbitrary time period to ensure that the second shaping module 1126 can output a correct signal. For example, the fourth preset time is less than 1 pulse width time. Optionally, the fourth preset time can be 0.25 times the pulse width time of consecutive input signals, can be 0.5 times the pulse width time of consecutive input signals, or can be other numbers of consecutive input signal pulse width times, ensuring that the edge difference between the output signal of the second communication module 110 and the output signal of the second carrier module 1124 is less than 1 pulse width time to ensure that the second shaping module 1126 can output a correct signal. Specifically, the fourth preset time can be 0.5 times the pulse width time of the output signal of the second communication module 110. Of course, the above examples are only for illustration and do not limit the specific setting of the fourth preset time. The fourth preset time can be set according to actual needs and will not be elaborated here.

[0079] Similarly, the specific function of the second trigger module 1122 is the same as that of the first trigger module 1042. For details, refer to the first trigger module 1042 and will not be elaborated here.

[0080] The input end of the second carrier module 1124 is connected to the output end of the second trigger module 1122. The second carrier module 1124 is used to generate a second pulse width modulation signal according to a preset baud rate when receiving the second trigger signal.

[0081] Similar to the first pulse width modulation signal, the second pulse width modulation signal has a constant pulse frequency and an adjustable pulse width.

[0082] The second input end of the second shaping module 1126 is connected to the second communication module 110, the first input end of the second shaping module 1126 is connected to the output end of the second carrier module 1124, and the output end of the second shaping module 1126 is connected to the input end of the first digital-to-analog conversion module 108. The second shaping module 1126 is used to generate a second digital signal according to the output signal of the second communication module 110 and the second pulse width modulation signal.

[0083] Similarly, the specific function of the second shaping module 1126 is the same as that of the first shaping module 1046. For details, please refer to the first shaping module 1046 and will not be elaborated here.

[0084] Through the coordinated operation of the second trigger module 1122, the second carrier module 1124, and the second shaping module 1126, a stable and reliable second digital signal can be generated when the second trigger module 1122 receives a second enable signal.

[0085] In one embodiment, the first carrier module 1044 is further configured to be in a reset state when the first trigger signal is not received.

[0086] When the first carrier module 1044 does not receive the first trigger signal, it does not generate the first pulse width modulation signal. At the same time, it resets the timer of the first pulse width modulation signal and resets the current count value of the timer to 0, so as to ensure that when processing the next frame of signal data, the time difference between the first pulse width modulation signal and the output signal of the first communication module 102 is consistent, so as to ensure that the first shaping module 1046 generates and outputs an accurate and reliable first digital signal.

[0087] In one embodiment, the second carrier module 1124 is further configured to be in a reset state when the second trigger signal is not received.

[0088] When the second carrier module 1124 does not receive the second trigger signal, it does not generate the second pulse width modulation signal. At the same time, it resets the timer of the second pulse width modulation signal and resets the current count value of the timer to 0, so as to ensure that when processing the next frame of signal data, the time difference between the second pulse width modulation signal and the output signal of the second communication module 110 is consistent, so as to ensure that the second shaping module 1126 generates and outputs an accurate and reliable second digital signal.

[0089] In one embodiment, the preset baud rate is the same as the baud rate of the input signal of the first communication module 102 and the baud rate of the input signal of the second communication module 110.

[0090] The baud rate refers to the number of bits transmitted per second in signal transmission, which determines the transmission speed of the signal. When the baud rates of two different signals are the same, their transmission speeds are the same, and the receiving end can receive and decode at the same rate to ensure correct identification and processing of the transmitted information.

[0091] The preset baud rate being the same as the baud rate of the input signal of the first communication module 102 and the baud rate of the input signal of the second communication module 110 is to ensure the stability and correctness of signal transmission. The same baud rate can make the waveform frequency of the first digital signal consistent with the input signal of the first communication module 102, and the waveform frequency of the second digital signal consistent with the input signal of the second communication module 110.

[0092] In one embodiment, when the first carrier module 1044 is included, there is a first preset time difference between the edge of the first pulse width modulation signal and the edge of the output signal of the first communication module 102.

[0093] The duty cycle of the first pulse width modulation signal can cause the sampling edge of the first pulse width modulation signal to have a first preset time difference from the edge of the output signal of the first communication module 102. A reasonable first preset time difference can reduce the distortion of the first digital signal. Optionally, the above time difference can be 0.5 times the pulse width time of the output signal of the first communication module 102. Of course, it can also be set to other time values, and the specific setting can be determined according to the requirements of actual applications, which will not be elaborated here.

[0094] When the second carrier module 1124 is included, there is a second preset time difference between the edge of the second pulse width modulation signal and the edge of the output signal of the second communication module 110.

[0095] The duty cycle of the second pulse width modulation signal can cause the sampling edge of the second pulse width modulation signal to have a second preset time difference from the edge of the output signal of the second communication module 110. A reasonable second preset time difference can reduce the distortion of the second digital signal. Optionally, the above time difference can be 0.5 times the pulse width time of the output signal of the second communication module 110. Of course, it can also be set to other time values, and the specific setting can be determined according to the requirements of actual applications, which will not be elaborated here.

[0096] In one embodiment, each component on the signal strengthening board is encapsulated in the same device.

[0097] In one embodiment, a circuit board is provided, including the above-mentioned signal strengthening board and four input / output pins, where two input / output pins are connected to the two input / output ends of the first communication module 102, and the other two input / output pins are connected to the two input / output ends of the second communication module 110.

[0098] In one embodiment, as Figure 3 shown, an elevator hall external communication system is provided, which is characterized by including a plurality of signal strengthening boards 100 as described above, a plurality of call boxes 200, and a control cabinet 300.

[0099] Among them, multiple signal strengthening boards 100 are connected in series at multiple levels.

[0100] The signal strengthening board strengthens and transmits the signal input to its input end. Through series connection, the signal strengthening board 100 physically divides the communication bus into multiple independent sub-communication loops. To ensure the quality of signal transmission, the number of nodes, communication distance, and cumulative total length of branch cables in each sub-communication loop need to meet the actual requirements. Optionally, the number of nodes in the sub-communication loop may not be greater than 30, the communication distance may not be greater than 150 meters, and the cumulative total length of branch cables is not greater than 150 meters. Of course, the above numerical requirements are only for illustrative purposes. The number of nodes and communication distance in the sub-communication loop can be determined according to the environment, circuit devices, etc., to control the influence degree of reflection and dielectric loss on signal transmission, prevent serious distortion of the transmitted signal, and balance cost and communication quality.

[0101] Multiple call boxes 200 are connected in series on the series connection path of multiple signal strengthening boards 100 through the communication bus; multiple call boxes 200 are used to generate and send ladder request signals to the communication bus. The call box 200 can generate a ladder request signal and send the ladder request signal to the communication bus.

[0102] The control cabinet 300 is connected to the first-level signal strengthening board 100 in the multi-level signal strengthening board 100 through the communication bus. The control cabinet 300 is used to receive the ladder request signal and generate an elevator response signal to the communication bus according to the ladder request signal.

[0103] When the control cabinet 300 receives the ladder request signal, it generates an elevator response signal to the communication bus according to the ladder request signal. Each signal strengthening board 100 receives the elevator response signal, strengthens it, and transmits it.

[0104] In one embodiment, the system further includes a motor.

[0105] Among them, the motor is connected to the control cabinet, and the motor drags the elevator car to move to the corresponding call position according to the scheduling control signal; among them, the scheduling control signal is a signal generated by the control cabinet according to the elevator response signal.

[0106] The control cabinet converts the scheduling control signal into a motor control signal, and drives the motor through the drive circuit of the elevator to control the operating state of the elevator car, such as starting, stopping, accelerating, decelerating, etc., until the elevator car is dragged to move to the corresponding call position. The control cabinet realizes the efficient operation of the elevator by continuously receiving and processing the scheduling control signal.

[0107] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", "ideal embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0108] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0109] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A signal strengthening board for an elevator, characterized in that, the signal strengthening board includes: a first communication module, a first analog-to-digital conversion module, a first enabling module, a first digital-to-analog conversion module, a second communication module, a second analog-to-digital conversion module, a second enabling module, and a second digital-to-analog conversion module; the first communication module, the first analog-to-digital conversion module, and the second digital-to-analog conversion module are connected in series in sequence, and the output end of the second digital-to-analog conversion module is respectively connected to the second enabling module and the second communication module; the second communication module, the second analog-to-digital conversion module, and the first digital-to-analog conversion module are connected in series in sequence, and the output end of the first digital-to-analog conversion module is respectively connected to the first enabling module and the first communication module; the control end of the first enabling module is connected to the controlled end of the first analog-to-digital conversion module, and the control end of the second enabling module is connected to the controlled end of the second analog-to-digital conversion module, so that when the first enabling module receives the output signal of the first digital-to-analog conversion module, it prohibits the first analog-to-digital conversion module from working, and when the second enabling module receives the output signal of the second digital-to-analog conversion module, it prohibits the second analog-to-digital conversion module from working.

2. The signal strengthening board according to claim 1, characterized in that, the first enabling module is used to prohibit the output of the first enabling signal within a first preset time when receiving that the output signal of the first digital-to-analog conversion module is a first valid signal, so as to prohibit the first analog-to-digital conversion module from working; the second enabling module is used to prohibit the output of the second enabling signal within a second preset time when receiving that the output signal of the second digital-to-analog conversion module is a second valid signal, so as to prohibit the second analog-to-digital conversion module from working; wherein, both the first valid signal and the second valid signal are signals inconsistent with the idle level of the communication bus.

3. The signal strengthening board according to claim 2, characterized in that, the first analog-to-digital conversion module includes: a first trigger module, the input end of the first trigger module is connected to the output end of the first communication module, the controlled end of the first trigger module is connected to the control end of the first enabling module, and the first trigger module is used to generate and output a first trigger signal when continuously receiving the first enabling signal and continuously receiving the output signal of the first communication module within a third preset time; a first carrier module, the input end of the first carrier module is connected to the output end of the first trigger module, and the first carrier module is used to generate a first pulse width modulation signal according to a preset baud rate when receiving the first trigger signal; a first shaping module, the first input end of the first shaping module is connected to the first communication module, the second input end of the first shaping module is connected to the output end of the first carrier module, and the output end of the first shaping module is connected to the input end of the second digital-to-analog conversion module. The first shaping module is used to generate a first digital signal according to the output signal of the first communication module and the first pulse width modulation signal.

4. The signal strengthening board according to claim 2, wherein, the second analog-to-digital conversion module includes: a second trigger module, the input end of the second trigger module is connected to the output end of the second communication module, the controlled end of the second trigger module is connected to the control end of the second enabling module, and the second trigger module is configured to generate and output a second trigger signal when continuously receiving the second enabling signal and continuously receiving the output signal of the second communication module for a fourth preset time; a second carrier module, the input end of the second carrier module is connected to the output end of the second trigger module, and the second carrier module is configured to generate a second pulse width modulation signal according to a preset baud rate when receiving the second trigger signal; a second shaping module, the second input end of the second shaping module is connected to the second communication module, the first input end of the second shaping module is connected to the output end of the second carrier module, the output end of the second shaping module is connected to the input end of the first digital-to-analog conversion module, and the second shaping module is configured to generate a second digital signal according to the output signal of the second communication module and the second pulse width modulation signal.

5. The signal strengthening board according to claim 3, wherein, the first carrier module is further configured to be in a reset state when not receiving the first trigger signal.

6. The signal strengthening board according to claim 4, wherein, the second carrier module is further configured to be in a reset state when not receiving the second trigger signal.

7. The signal strengthening board according to any one of claims 3-6, wherein, the preset baud rate is the same as the baud rate of the input signal of the first communication module and the baud rate of the input signal of the second communication module.

8. The signal strengthening board according to any one of claims 3-6, wherein, when the first carrier module is included, there is a first preset time difference between the edge of the first pulse width modulation signal and the edge of the output signal of the first communication module; when the second carrier module is included, there is a second preset time difference between the edge of the second pulse width modulation signal and the edge of the output signal of the second communication module.

9. An elevator hall external communication system, wherein, it includes: a plurality of signal strengthening boards according to any one of claims 1-8, and the plurality of signal strengthening boards are connected in series in multiple levels; a plurality of call boxes, and the plurality of call boxes are connected in series through a communication bus on the series connection path of the plurality of signal strengthening boards; the plurality of call boxes are configured to generate and send a lift request signal to the communication bus; a control cabinet, the control cabinet is connected to the first-level signal strengthening board in the multi-level signal strengthening board through the communication bus, and the control cabinet is configured to receive the lift request signal and generate an elevator response signal to the communication bus according to the lift request signal.

10. The elevator hall external communication system according to claim 9, wherein, the system further includes: A motor, the motor is connected to the control cabinet, and the motor drags the elevator car to move to the corresponding call position according to the scheduling control signal; wherein, the scheduling control signal is a signal generated by the control cabinet according to the elevator response signal.

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