A minimalist elevator intercom device

Abstract

The utility model aims at providing a kind of minimalist elevator intercom device, circuit is simple, low in cost, installation is simple, adopts two-wire system communication, power amplification mode interfaces elevator intercom analog intercom circuit, realizes the talk construction between outside line equipment and elevator intercom and voice transmission.The utility model includes single-chip microcomputer master control module, and the single-chip microcomputer master control module is connected with audio frequency interaction module, and the audio frequency interaction module includes audio interface chip, audio power amplifier and loudspeaker microphone, the QR pin of audio interface chip is connected with the INN pin of audio power amplifier, the SPK+ pin of audio power amplifier,SPK- pin is connected with the pin corresponding to loudspeaker microphone, the VCC-U1 pin of audio power amplifier is connected with the pin corresponding to single-chip microcomputer master control module.The utility model is applied to the technical field of digital transmission.

Description

Technical Field

[0001] This invention relates to the field of digital transmission technology, and in particular to a very simple elevator intercom device. Background Technology

[0002] Elevator intercom systems, as a crucial component for safe elevator operation, are widely used in various types of elevators. They primarily facilitate communication between the elevator car, machine room, car top, pit, and elevator control center. Traditional elevator intercom systems mostly employ digital communication technology or multi-wire analog communication, using complex wiring layouts and multi-wire transmission methods to achieve signal transmission and functional control. Such systems typically include multiple modular components, such as voice processing modules, signal conversion modules, and communication interface modules, to ensure communication stability and functional integrity.

[0003] For example, Chinese patent CN206686182U discloses an elevator digital voice intercom system. This system includes a microphone, speaker, buttons, and analog-to-digital (ADC) / digital-to-analog (DAC) module installed in the elevator car, and a microprocessor module, radio frequency (RF) module, antenna, and power supply module installed in the machine room. The ADC and RF modules are connected via a transmission cable. The microphone acquires analog signals, the ADC receives these analog signals and converts them into digital signals, which are then transmitted to the RF module via the transmission cable. The RF module modulates the digital signals and transmits them through the antenna. The RF module demodulates the incoming digital signals and transmits them back to the ADC via the transmission cable. The ADC converts the demodulated digital signals back into analog signals and then transmits the analog signals to the speaker. However, this system has the following drawbacks: High Cost: Traditional elevator intercom systems, employing complex digital communication technologies or multi-wire analog communication, require high-performance processors, memory, and various communication interfaces, resulting in high hardware procurement costs. Furthermore, the complex installation and commissioning process necessitates specialized technicians, further increasing labor costs. In addition, the complex wiring layout significantly raises material costs, leading to a persistently high overall cost for the intercom system, making it unaffordable for small elevator projects or venues with limited budgets.

[0004] Installation is complex: Traditional elevator intercom systems typically use a multi-wire transmission method, requiring the laying of numerous communication lines, including voice signal lines, control signal lines, and power lines. Laying these lines not only demands precise wiring planning but also necessitates consideration of electromagnetic interference between lines, making the installation process cumbersome and time-consuming. Within the elevator shaft, the confined space and complex environment further complicate the installation and securing of the wiring, increasing the risk of problems such as wire crossings and short circuits, which can affect the normal operation of the system. Moreover, once a problem occurs with the wiring, repair and replacement are difficult and require significant time and effort.

[0005] Maintenance difficulties: Traditional elevator intercom systems have complex internal circuits, containing multiple modules and numerous electronic components, which are prone to failure during long-term operation. A problem with even one module or component can cause the entire system to malfunction, affecting the safe operation of the elevator. Furthermore, system maintenance requires specialized technicians who must meticulously inspect each module and component to locate and repair the fault. This complex maintenance process is not only time-consuming and labor-intensive but can also lead to prolonged elevator downtime, causing inconvenience to users.

[0006] Insufficient Communication Stability: Although traditional elevator intercom systems employ digital communication technology, in certain environments, such as strong electromagnetic interference within the elevator shaft or excessively long signal transmission distances, communication signals are still susceptible to interference, leading to unclear voice communication and signal interruptions. Furthermore, digital communication systems require encoding and decoding during signal transmission, which may introduce delays, affecting the real-time nature of communication. Especially in emergencies, this can delay rescue efforts and threaten passenger safety.

[0007] Therefore, it is necessary to provide a very simple elevator intercom device with simple circuitry, low cost, and easy installation. It adopts two-wire communication and power amplification to connect to the elevator intercom's analog intercom circuit, realizing the establishment of communication and voice transmission between the external equipment and the elevator intercom. Utility Model Content

[0008] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a very simple elevator intercom device with simple circuit, low cost and easy installation. It adopts two-wire communication and power amplification to connect to the elevator intercom analog intercom circuit to realize the construction of communication and voice transmission between the external equipment and the elevator intercom.

[0009] The technical solution adopted by this utility model is as follows: This utility model includes a microcontroller main control module, which is connected to an audio interaction module. The audio interaction module includes an audio interface chip, an audio power amplifier, and a speaker microphone. The QR pin of the audio interface chip is connected to the INN pin of the audio power amplifier. The SPK+ and SPK- pins of the audio power amplifier are connected to the corresponding pins of the speaker microphone. The VCC-U1 pin of the audio power amplifier is connected to the corresponding pin of the microcontroller main control module.

[0010] As described above, the audio interaction module uses two-wire communication and power amplification to connect to the elevator intercom's analog intercom circuit, enabling call establishment and voice transmission between the external device and the elevator intercom. This application has the following advantages: 1. Cost reduction Hardware costs: By using software-simulated communication technology to replace complex digital communication technology or multi-wire analog communication, the reliance on hardware devices such as high-performance processors, memory and multiple communication interfaces is reduced, thus lowering hardware procurement costs. Installation Costs: Analog two-wire communication technology simplifies wiring layout, requiring only two wires for communication, significantly reducing the use of wiring materials and lowering material costs. Simultaneously, the installation process eliminates the need for complex wiring planning and specialized technicians, reducing labor costs. Maintenance costs: The simplified internal circuitry and reduced number of electronic components lower the probability of component failure, thus reducing maintenance workload and costs.

[0011] 2. Easy to install Simplified wiring: Only two lines need to be laid, which greatly reduces the number of lines compared to the traditional multi-line transmission method, simplifies wiring planning, and reduces wiring difficulty; Spatial adaptability: In the confined space of the elevator shaft, the installation and fixing of the two-line communication lines is easier, reducing the probability of problems such as line crossing and short circuit, and improving installation efficiency; Easy to maintain: Once a problem occurs with the circuit, the simple circuit makes repair and replacement easier, reducing the time and effort required for maintenance.

[0012] In a preferred embodiment, the simplified elevator intercom device further includes a system power supply module, which includes a step-down DC / DC converter, and the VCC-U1 pin of the step-down DC / DC converter is connected to the corresponding pin of the microcontroller main control module.

[0013] In a preferred embodiment, the simplified elevator intercom device further includes an indicator light module, which includes a first LED, a second LED, a third LED, a fourth LED, and a fifth LED. The VCC-U1 pins of the first LED, the second LED, the third LED, the fourth LED, and the fifth LED are all connected to the corresponding pins of the microcontroller main control module.

[0014] In a preferred embodiment, the simplified elevator intercom device further includes an analog communication circuit, wherein the PA06 pin of the analog communication circuit is connected to the corresponding pin of the microcontroller main control module. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the present invention; Figure 2 This is the circuit schematic diagram of the microcontroller main control module. Figure 3 This is the circuit schematic of the audio interaction module; Figure 4 This is the circuit schematic diagram of the power supply module of the system; Figure 5 This is the circuit schematic of the analog communication circuit. Figure 6 This is the circuit diagram of the indicator light module. Detailed Implementation

[0016] like Figures 1 to 3 As shown, in this embodiment, the present invention includes a microcontroller main control module 1, which is connected to an audio interaction module 2. The audio interaction module 2 includes an audio interface chip U1, an audio power amplifier U5, and a speaker microphone CN2. The QR pin of the audio interface chip U1 is connected to the INN pin of the audio power amplifier U5. The SPK+ and SPK- pins of the audio power amplifier U5 are connected to the corresponding pins of the speaker microphone CN2. The VCC-U1 pin of the audio power amplifier U5 is connected to the corresponding pin of the microcontroller main control module 1.

[0017] The microcontroller main control module 1 is model CW32L011K8T6, the audio interface chip U1 is model TEA1062A, and the audio power amplifier U5 is model LM8002. The microcontroller main control module 1 constructs an internal and external interactive signal channel, captures external trigger information, and notifies the main control MCU to trigger an alarm. The audio interaction module 2 adopts two-wire communication and uses power amplification to connect to the elevator intercom's analog intercom circuit, realizing the establishment of communication and voice transmission between the external equipment and the elevator intercom.

[0018] like Figure 4 As shown, in this embodiment, the simplified elevator intercom device also includes a system power supply module 3, which includes a step-down DC / DC converter U2. The VCC-U1 pin of the step-down DC / DC converter U2 is connected to the corresponding pin of the microcontroller main control module 1. The step-down DC / DC converter U2 is a BL8032, with a wide voltage input, and provides the DC power required for system conversion through internal multi-stage linear voltage regulation and filtering.

[0019] like Figure 6 As shown, in this embodiment, the simplified elevator intercom device further includes an indicator light module 5. The indicator light module 5 includes a first LED1, a second LED2, a third LED3, a fourth LED4, and a fifth LED5. The VCC-U1 pins of the first LED1, the second LED2, the third LED3, the fourth LED4, and the fifth LED5 are all connected to the corresponding pins of the microcontroller main control module 1. The indicator light module 5 visually displays the device's power supply information and operating status to external personnel, such as power status, undervoltage status, call status, alarm filtering status, and alarm light status.

[0020] like Figure 5 As shown, in this embodiment, the simplified elevator intercom device further includes an analog communication circuit 4. The PA06 pin of the analog communication circuit 4 is connected to the corresponding pin of the microcontroller main control module 1. The analog communication circuit 4 outputs signals through the microcontroller's I / O port and generates analog communication signals through an RC oscillation circuit. The analog communication circuit 4 serves to identify signals and facilitate communication within the entire device.

[0021] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.

Claims

1. A minimalist elevator intercom device, comprising a microcontroller main control module (1), characterized in that: The microcontroller main control module (1) is connected to an audio interaction module (2). The audio interaction module (2) includes an audio interface chip (U1), an audio power amplifier (U5), and a speaker microphone (CN2). The QR pin of the audio interface chip (U1) is connected to the INN pin of the audio power amplifier (U5). The SPK+ and SPK- pins of the audio power amplifier (U5) are connected to the corresponding pins of the speaker microphone (CN2). The VCC-U1 pin of the audio power amplifier (U5) is connected to the corresponding pin of the microcontroller main control module (1).

2. The simplified elevator intercom device according to claim 1, characterized in that: The simplified elevator intercom device also includes a system power supply module (3), which includes a step-down DC / DC converter (U2). The VCC-U1 pin of the step-down DC / DC converter (U2) is connected to the corresponding pin of the microcontroller main control module (1).

3. The simplified elevator intercom device according to claim 1, characterized in that: The simplified elevator intercom device also includes an indicator light module (5), which includes a first light-emitting diode (LED1), a second light-emitting diode (LED2), a third light-emitting diode (LED3), a fourth light-emitting diode (LED4), and a fifth light-emitting diode (LED5). The VCC-U1 pins of the first light-emitting diode (LED1), the second light-emitting diode (LED2), the third light-emitting diode (LED3), the fourth light-emitting diode (LED4), and the fifth light-emitting diode (LED5) are all connected to the corresponding pins of the microcontroller main control module (1).

4. The simplified elevator intercom device according to claim 1, characterized in that: The simplified elevator intercom device also includes an analog communication circuit (4), the PA06 pin of which is connected to the corresponding pin of the microcontroller main control module (1).

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