Electronic limiting stopper

Abstract

The utility model discloses an electronic limiter, which relates to the technical field of limiting devices and comprises a shell, a metering element arranged in the shell, a sound-light alarm module and a detection control module, the metering element is installed at one end of the rotating shaft, the other end of the rotating shaft extends out of the shell to be connected with the gear assembly outside the shell, the sound-light alarm module is electrically connected with the detection control module and used for conducting limiting abnormity alarm, and the detection control module comprises a controller chip, a remote control receiving module and a power module. The output end of the metering element is electrically connected with the input end of the controller chip, the power module is used for providing required power for the controller chip and the remote control receiving module, the controller chip is connected with the remote control receiving module through a serial port, and the remote control receiving module is used for receiving remote control signals sent by the remote control transmitting device. The upper and lower limit positions can be accurately detected, so that the detection is more accurate, the operation is more stable, remote limit regulation and control can be carried out, and the application is safer and more convenient.

Description

Technical Field

[0001] This application relates to the field of limit device technology, specifically to an electronic limiter. Background Art

[0002] Currently, the limit devices of electric roller shutters generally rely on mechanical limit switches. Therefore, during installation, these mechanical limit switches must be manually adjusted to the appropriate height. Because the limit devices are installed at a high position, there are some safety risks associated with adjusting them. Furthermore, mechanical limit switches consist of simple nuts, sliders, and up / down switches; the nuts and sliders may malfunction or become inaccurate due to long-term wear or gas corrosion. Although electronic limit switches have been adopted to simplify the installation process of roller shutters, existing electronic limit switches on the market still suffer from unstable operation, complex construction, and poor practical application results. Utility Model Content

[0003] In view of this, this application provides an electronic limit switch to solve the technical problems of existing mechanical limit switches that may malfunction or become inaccurate due to long-term wear or gas corrosion, as well as the problems of unstable operation, complex structure, and poor practical application effect of existing electronic limit switches on the market.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electronic limiter, comprising: a housing, a measuring element disposed within the housing, an audible and visual alarm module, and a detection and control module;

[0005] The measuring element is installed at one end of the rotating shaft, and the other end of the rotating shaft extends out of the housing and is connected to the gear assembly outside the housing. The audible and visual alarm module is electrically connected to the detection and control module. The audible and visual alarm module is used to perform limit abnormality alarm. The measuring element adopts an encoder.

[0006] The detection and control module includes a controller chip, a remote control receiver module, and a power supply module. The output terminal of the metering element is electrically connected to the input terminal of the controller chip. The power supply module provides the necessary power to the controller chip and the remote control receiver module. The controller chip and the remote control receiver module are connected via a serial port. The remote control receiver module is used to receive remote control signals sent by the remote control transmitter.

[0007] Furthermore, the shell is cylindrical.

[0008] Furthermore, it also includes a display screen, which is electrically connected to the controller chip.

[0009] Furthermore, the sound and light alarm module includes an LED light control unit, a buzzer alarm control unit, and a voice module. The LED light control unit is electrically connected to the controller chip, the buzzer alarm control unit is electrically connected to the controller chip, and the voice module includes a voice chip and a speaker. The control terminal of the speaker is electrically connected to the signal output terminal of the voice chip, and the voice chip is connected to the controller chip via a serial port.

[0010] Furthermore, the power module includes a transformer T1, a bridge rectifier A1, a voltage conversion chip U1, capacitors C1, C2, and C3. The primary coil of transformer T1 is electrically connected to the AC output terminal, and the secondary coil of transformer T1 is electrically connected to the AC side of bridge rectifier A1. One end of the DC side of bridge rectifier A1 is electrically connected to one end of capacitor C1, one end of capacitor C2, and the input terminal of voltage conversion chip U1. The other ends of capacitors C1 and C2 are grounded, and capacitor C3 is connected between the output terminal of voltage conversion chip U1 and ground.

[0011] Furthermore, the remote control receiver module includes an infrared receiver head, a resistor R1, and a capacitor C4. The power supply pin of the infrared receiver head is connected to one end of the resistor R1 and one end of the capacitor C4. The other end of the resistor R1 is connected to the power supply, and the other end of the capacitor C4 is grounded. The output terminal of the infrared receiver head is electrically connected to the signal input terminal of the controller chip.

[0012] As can be seen from the above technical solution, the advantages of this utility model are:

[0013] This application employs high-precision sensing technology, enabling real-time monitoring and recording of the shaft's operating position, and detecting upper and lower limit positions. This results in more accurate detection, helps reduce equipment malfunctions and abnormal shutdowns, and promotes more stable operation. Furthermore, it allows for remote limit control, making the application safer and more convenient. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0015] Figure 1 This is a schematic diagram of the composition and structure of an electronic limiter according to the present invention.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the circuit structure of the detection and control module of this utility model.

[0018] Figure 4 This is a schematic diagram of the circuit structure of the buzzer alarm control unit of this utility model.

[0019] Figure label:

[0020] Housing-1, Measuring element-2, Rotating shaft-3, Gear assembly-4. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0022] Electronic limit switches precisely control the movement range of mechanical equipment, preventing it from exceeding its predetermined movement trajectory, thereby ensuring the stability and safety of the production process. This embodiment provides an electronic limit switch that can accurately detect upper and lower limit positions, making detection more precise and operation more stable, and also allows for remote limit control. (See reference...) Figures 1 to 4 The device mainly includes: a housing 1, a measuring element 2 housed within the housing 1, an audible and visual alarm module, and a detection and control module. The housing 1 is cylindrical. The measuring element 2 is mounted on one end of a rotating shaft 3, the other end of which extends out of the housing 1 and connects to a gear assembly 4 outside the housing 1. The audible and visual alarm module is electrically connected to the detection and control module and is used for limit switch malfunction alarms. The measuring element 2 is an encoder. The detection and control module includes a controller chip, a remote control receiver module, and a power supply module. The output of the measuring element 2 is electrically connected to the input of the controller chip. The power supply module provides the necessary power to the controller chip and the remote control receiver module. The controller chip and the remote control receiver module are connected via a serial port, and the remote control receiver module receives remote control signals sent by the remote control transmitter. The controller chip and the power supply module are housed within a housing, and the remote control receiver module and the audible and visual alarm module are embedded in this housing, which is mounted on the top of the roller shutter door's casing.

[0023] In this embodiment, a display screen is also included, which is electrically connected to the controller chip. The display screen is embedded in the housing and is used to display current adjustment parameter information.

[0024] In use, the housing 1 containing the measuring element 2 is fixed to the side of the roller shutter door motor box, so that the gear assembly 4 and the gear on the output shaft of the motor box mesh, causing the output shaft of the motor box to drive the gear assembly 4 to rotate. When the limit device is working, the automatic stop position of the roller shutter door needs to be set. First, the roller shutter door is stopped at the desired initial position using the remote control. Then, the button corresponding to the up or down function on the remote control is pressed. The remote control receiving module receives the signal and sends it to the controller chip. The controller chip sends an electrical signal to the motor control circuit to drive the roller shutter door motor to start working and counts the number of revolutions of the encoder. When the roller shutter door rises or falls to the predetermined stop position, the stop button is pressed. The remote control receiving module receives the signal and sends it to the controller chip. The controller chip sends an electrical signal to the motor control circuit to drive the roller shutter door motor to stop working and stops counting, storing the corresponding counting parameters as the upper and lower limit position parameters. This achieves the effect of precise control of the roller shutter door position without the need for height adjustment.

[0025] If a limit switch malfunction occurs during use, the controller chip will activate the audible and visual alarm module. Specifically, the audible and visual alarm module includes an LED light control unit, a buzzer alarm control unit, and a voice module. The LED light control unit and the buzzer alarm control unit are electrically connected to the controller chip. The voice module includes a voice chip and a speaker. The speaker's control terminal is electrically connected to the voice chip's signal output terminal, and the voice chip is connected to the controller chip via a serial port. The voice synthesizer is model XFS3031CNPEVB, and the communication interface pins of the voice synthesis chip are connected to the serial port on the controller chip via a connecting cable. The controller chip is model STM32F407VGT6. When a voice alarm is triggered, the controller chip controls the voice synthesis chip to output a preset voice signal, which is then played through the speaker. The LED is a red and blue dual-color flashing LED, triggered by the controller chip's control signal during an alarm.

[0026] Specifically, in this embodiment, the LED light control unit includes an LED light and an LED driving circuit. The LED driving circuit is a monostable circuit composed of a 555 timer chip, which drives the LED light to emit light via PWM. The LED driving circuit is communicatively connected to the controller chip. The LED light is a red and blue alternating flashing LED light. If the rotating shaft 3 continues to rotate when it exceeds the upper or lower limit position, the LED light can be controlled to emit an alarm signal. Figure 4As shown, the buzzer alarm control unit includes an amplification drive circuit and a buzzer. The amplification drive circuit includes a transistor Q1, a diode D1, a resistor R2, and a filter capacitor C5. The base of transistor Q1 is electrically connected to the I / O terminal of the controller chip through the resistor R2. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected to the positive terminal of diode D1. The negative terminal of diode D1 is connected to the power supply terminal. The filter capacitor C5 is connected between the power supply and ground. The buzzer is connected across diode D1.

[0027] like Figure 3 As shown, the power module includes a transformer T1, a bridge rectifier A1, a voltage conversion chip U1, capacitors C1, C2, and C3. The primary coil of transformer T1 is electrically connected to the AC output terminal, and the secondary coil of transformer T1 is electrically connected to the AC side of bridge rectifier A1. One end of the DC side of bridge rectifier A1 is electrically connected to one end of capacitor C1, one end of capacitor C2, and the input terminal of voltage conversion chip U1. The other ends of capacitors C1 and C2 are grounded. Capacitor C3 is connected between the output terminal of voltage conversion chip U1 and ground. The voltage conversion chip U1 is model L78L33. The AC power is stepped down to 12V by the transformer, then rectified by bridge rectifier A1, and finally stepped down and regulated by voltage conversion chip and external circuitry before being output to the device.

[0028] like Figure 3 As shown, the remote control receiver module includes an infrared receiver head, a resistor R1, and a capacitor C4. The power supply pin of the infrared receiver head is connected to one end of the resistor R1 and one end of the capacitor C4. The other end of the resistor R1 is connected to the power supply, and the other end of the capacitor C4 is grounded. The output terminal of the infrared receiver head is electrically connected to the signal input terminal of the controller chip. The infrared receiver head uses a universal infrared receiver head IR1838.

[0029] When setting the upper and lower limit positions, the user needs to send a preset signal via a remote control. In this embodiment, a conventional universal remote control is used, and its transmission frequency can be adjusted. This remote control generally consists of an encoding modulation module and a main controller. The encoding modulation module consists of a modulator, a signal amplifier, and an infrared diode. The modulator and signal amplifier are connected, and the output of the signal amplifier is connected to the positive terminal of the infrared diode, driving the infrared diode to emit a pulse modulation signal. The high-frequency oscillation signal generated by the main controller is processed and modulated onto the carrier signal by the modulator to form a high-frequency pulse train containing functional information. After being amplified by the signal amplifier, it drives the infrared LED to emit a pulse modulation signal, which is then received by the remote control receiving module to control the limit switch. It is convenient and safe to use.

[0030] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electronic limiter, characterized in that, include: Housing (1), metering element (2) disposed within the housing (1), audible and visual alarm module and detection control module; The metering element (2) is installed at one end of the rotating shaft (3), and the other end of the rotating shaft (3) extends out of the housing (1) and is connected to the gear assembly (4) outside the housing (1). The sound and light alarm module is electrically connected to the detection and control module. The sound and light alarm module is used to perform limit abnormality alarm. The detection and control module includes a controller chip, a remote control receiver module and a power supply module. The output terminal of the metering element (2) is electrically connected to the input terminal of the controller chip. The power supply module is used to provide the required power to the controller chip and the remote control receiver module. The controller chip and the remote control receiver module are connected through a serial port. The remote control receiver module is used to receive the remote control signal sent by the remote control transmitter.

2. The electronic limiter as described in claim 1, characterized in that, The shell (1) is cylindrical.

3. The electronic limiter as described in claim 1, characterized in that, It also includes a display screen, which is electrically connected to the controller chip.

4. The electronic limiter as described in claim 1, characterized in that, The sound and light alarm module includes an LED light control unit, a buzzer alarm control unit, and a voice module. The LED light control unit is electrically connected to the controller chip, the buzzer alarm control unit is electrically connected to the controller chip, and the voice module includes a voice chip and a speaker. The control terminal of the speaker is electrically connected to the signal output terminal of the voice chip, and the voice chip is connected to the controller chip via a serial port.

5. The electronic limiter as described in claim 1, characterized in that, The power module includes a transformer T1, a bridge rectifier A1, a voltage conversion chip U1, capacitors C1, C2, and C3. The primary coil of the transformer T1 is electrically connected to the AC output terminal, and the secondary coil of the transformer T1 is electrically connected to the AC side of the bridge rectifier A1. One end of the DC side of the bridge rectifier A1 is electrically connected to one end of capacitor C1, one end of capacitor C2, and the input terminal of the voltage conversion chip U1. The other ends of capacitors C1 and C2 are grounded, and capacitor C3 is connected between the output terminal of the voltage conversion chip U1 and ground.

6. The electronic limiter as described in claim 1, characterized in that, The remote control receiver module includes an infrared receiver head, a resistor R1, and a capacitor C4. The power supply pin of the infrared receiver head is connected to one end of the resistor R1 and one end of the capacitor C4. The other end of the resistor R1 is connected to the power supply, and the other end of the capacitor C4 is grounded. The output terminal of the infrared receiver head is electrically connected to the signal input terminal of the controller chip.

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