Anti-collision control panel of freight elevator

Abstract

The utility model discloses an anti-collision control panel for a freight elevator, which is characterized in that a chip is arranged on the control panel and is used for receiving an input signal of a sensor and outputting an execution signal to an actuator and a main control system for data communication; the input end of the power supply module is connected with an alternating-current power supply to convert alternating-current voltage into direct-current voltage and output the direct-current voltage to provide electric energy and voltage signals; the signal output module is connected with the chip and is used for converting the level signal output by the chip into an on-off signal to be output; the signal input module is connected with the chip and is used for converting an on-off signal input by the inductor into a level signal to be input; and the serial port communication module is respectively connected with the chip and the main control system and is used for data communication.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to an anti-collision control board for freight elevators. Background Technology

[0002] Freight elevators are a type of elevator primarily designed for transporting goods. They are designed and equipped with additional functions and specifications to meet the standards for both cargo carrying and safety, based on the basic functions of a regular elevator.

[0003] Freight elevators typically transport goods and staff. During transport, it is common to encounter situations where staff are working together to move goods and there are no available personnel to press the elevator button. In such cases, staff either have to call for help or put down the goods, which affects work efficiency.

[0004] Thus, some people have designed elevators that can be called without contact. When staff arrive at the elevator floor, the detector in front of the elevator detects the staff and calls the elevator. For example, Chinese patent with authorization announcement number CN 207618806 U discloses the installation of an infrared sensor switch on the elevator door frame. When the infrared sensor switch detects a person in front of the elevator door, the controller controls the elevator button to call the elevator to stop at that floor. Utility Model Content

[0005] The purpose of this utility model is to provide a collision avoidance control board for a freight elevator. The control board has a chip, a signal input module, and a signal output module. The signal input module is connected to the sensor outside the elevator door. When a person signal is input, the elevator is activated, so that the staff does not need to press the elevator button when moving goods, which improves work efficiency and avoids the collision of goods with the elevator door.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a freight elevator anti-collision control board, wherein the control board is equipped with...

[0007] The chip is used to receive sensor input signals and output execution signals to the actuator and the main control system for data communication.

[0008] The power module has an input terminal connected to an AC power source to convert AC voltage into DC voltage output to provide electrical energy and voltage signals.

[0009] A signal output module, which is connected to a chip, converts the level signal output by the chip into an on / off signal output.

[0010] A signal input module, which is connected to a chip, converts the on / off signal input from the sensor into a level signal input;

[0011] A serial communication module is provided, which is connected to both the chip and the main control system for data communication.

[0012] A further feature of this invention is that the chip is an MCU with model number CMS32L051QN20.

[0013] A further feature of this invention is that the DC voltage output by the power module is 24V and 3.3V.

[0014] A further feature of this invention is that the signal output module includes a signal relay, a first optocoupler, and a transistor. The positive terminal of the power supply pin of the signal relay is connected to the DC voltage output by the power supply module, the negative terminal of the power supply pin of the signal relay is connected to the collector of the transistor, the emitter of the transistor is connected to the ground point, the base of the transistor is connected to the output terminal of the first optocoupler, and the input terminal of the first optocoupler is connected to the pin of the chip.

[0015] A further configuration of this invention is as follows: the LED anode of the first optocoupler is connected to the DC voltage output by the power supply module, the cathode of the first optocoupler is connected to the pin of the chip, the collector of the first optocoupler is connected to the DC voltage output by the power supply module, and the emitter of the first optocoupler is connected to the base of the transistor.

[0016] A further feature of this invention is that the number of signal output modules is two, and the signal output modules are used for door opening signal output or other purposes.

[0017] A further feature of this invention is that the signal input module includes a second optocoupler, the second optocoupler being an LTV-354T or other equivalent optocoupler, the input terminal of the second optocoupler being connected to the DC voltage output by the power module and the sensor input terminal respectively, and the output terminal of the second optocoupler being connected to the chip pins and the ground point respectively.

[0018] A further feature of this invention is that the sensor includes one or more of the following: a microwave sensor, an infrared sensor, a door closing sensor, and a button.

[0019] A further feature of this invention is that the serial communication module includes a third optocoupler, which is an ELM600(TA) or other equivalent optocoupler.

[0020] This utility model has the following beneficial effects: 1. The control board has four sets of signal input modules and two sets of signal output modules. The signal input modules convert on / off signals into level signals for input, and the signal output modules convert level signals into on / off signals for output; 2. The signal input modules are connected to sensors outside the elevator doors. The sensors detect whether there is a person outside the elevator doors and input a person signal to start the elevator. When workers are moving goods, they do not need to press elevator buttons, which improves work efficiency and avoids collisions between goods and elevator doors. Attached Figure Description

[0021] Figure 1This is a structural block diagram of the control board in the embodiment.

[0022] Figure 2 This is a PCB structure diagram of the control board in the embodiment.

[0023] Figure 3 This is a circuit schematic diagram of the chip, signal input module, and serial communication module in the embodiment.

[0024] Figure 4 This is a circuit diagram of the power supply module and signal output module in the embodiment.

[0025] Figure 5 This is a schematic diagram of the signal output module circuit in the embodiment.

[0026] Figure 6 This is a schematic diagram of the signal input module circuit in the embodiment.

[0027] Figure 7 This is a schematic diagram of the serial communication module circuit in the embodiment.

[0028] In the diagram: 11. Chip; 12. Power module; 13. Signal output module; 14. Signal input module; 15. Serial communication module. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] This embodiment discloses a collision avoidance control board for a freight elevator. The control board is used for the collision avoidance function of the freight elevator. In use, the control board is installed on each floor of the freight elevator. The control board is connected to the main control system of the freight elevator via a data cable for data communication. The control board is connected to sensors installed on each floor. The sensors can detect whether there are people outside the elevator door. The control board receives the sensor signals and transmits the signal information of whether there are people on the floor where the control board is located who need to take the elevator to the main control system of the freight elevator through data communication, so that the freight elevator reaches the designated floor.

[0031] like Figure 1-4As shown, the control board includes a chip 11, a power module 12, a signal output module 13, a signal input module 14, and a serial communication module 15. The power module 12 connects to an AC power source, converting AC voltage into DC voltage to provide power to the control chip 11 or to provide a voltage signal source for the signal outputs of the signal output modules 13, 14, and 15. The signal output module 13, 14, and 15 are connected to the chip 11. The signal input to the signal input module 14 is converted into a level signal input, the signal output module 13 converts the level signal output from the chip 11 into an on / off signal output, and the serial communication module 15 is used for data communication.

[0032] like Figure 3 As shown, in this embodiment, chip 11 is chip 11U2, model CMS32L051QN20, which is a 20-pin ARM in QN package of CMS32L051 series.

[0033] like Figure 4 As shown, the power module 12 rectifies and filters the input AC power and converts it into DC 24V and DC 3.3V voltage outputs.

[0034] like Figure 2 , Figure 4 As shown, two sets of signal output modules 13 are arranged on the control board. In actual use, one set of signal output modules 13 is used as the output of the door opening signal and connected to the door opening actuator to output a signal that is on or off so that the door opening actuator receives the signal and opens the elevator door after the elevator arrives at the floor. The other set of signal output modules 13 is temporarily used as a spare signal output and is reserved. When needed, it is connected to this through the output terminal.

[0035] like Figure 5A set of signal output modules 13 on the control board serves as the door opening signal output. It includes a signal relay KM1, an optocoupler U11, and a transistor Q2. The positive terminal of the power supply pin of signal relay KM1 is connected to the 3.3V DC voltage output by power supply module 12. The negative terminal of the power supply pin of signal relay KM1 is connected to the collector of transistor Q2. The emitter of transistor Q2 is connected to ground. The base of transistor Q2 is connected to the emitter of optocoupler U11. A resistor R27 is connected between the base and emitter of transistor Q2 to limit the circuit current. A resistor R28 is also connected between the emitter and base of transistor Q2. The collector of optocoupler U11 is connected to the 3.3V DC voltage output by power supply module 12 via resistor R21. The LED anode of optocoupler U11 is connected to the 3.3V DC voltage output by power supply module 12 via resistor R22. The LED cathode of optocoupler U11 is connected to pin OUT0 of chip 11. The output terminals of signal output module 13 are divided into normally open, normally closed, and... The common point, normally closed and connected, is normally open, and disconnected from the common point. It serves as the door opening signal output terminal connected to the door opening actuator. When the floor is not open, the normally closed and common points are normally connected ("1"), and the normally open and common points are disconnected ("0"). When the door needs to be opened, chip 11 outputs a low-level signal, the LED anode and cathode of optocoupler U11 are connected, optocoupler U11 is turned on, and the 3.3V DC voltage forms a path through resistor R21, optocoupler U11, resistor R27, resistor R28 and ground point in sequence. There is voltage on the base of transistor Q2, transistor Q2 is turned on, the power pin of signal relay KM1 is energized, signal relay KM1 switches, the normally closed and common points are disconnected, and the normally open and common points are connected. The signal becomes "0" when the normally closed and common points are normally connected, and "1" when the normally open and common points are disconnected. In this way, signal output module 13 converts the level signal output by chip 11 into an on / off signal and outputs it, causing the door opening actuator to open the elevator door.

[0036] In this embodiment, two sets of signal output modules 13 are provided. The circuit structures of the signal output modules 13 are the same and will not be described in detail.

[0037] like Figure 2 , Figure 3As shown, four sets of signal input modules 14 are arranged on the control board. In actual use, one set of signal input modules 14 is used as the input for the person signal, connected to the sensor, and the signal output by the sensor is input to the chip 11 through the signal input module 14. In actual use, the second set of signal input modules 14 is used as the input for the door closing contact signal, connected to the door closing sensor, and the signal of the elevator door closing confirmation detected by the door closing sensor is input to the chip 11 through the signal input module 14. The chip 11 can transmit the elevator door closing confirmation signal to the main control system of the freight elevator through the serial communication module 15. The other two sets of signal input modules 14 are reserved and connected when signal input is needed. For example, the third set of signal input modules 14 is used as the input for the elevator buttons, connected to the elevator door buttons on the floors, and the signal output by the buttons is input to the chip 11 through the signal input module 14. The fourth set of signal input modules 14 is used as the input for the infrared sensor, and the infrared sensor is installed in the elevator car to sense whether there are people in the elevator.

[0038] like Figure 6 A set of signal input modules 14 is used as the door closing contact signal module, including optocoupler U6, model LTV-354T, which can be replaced by an optocoupler with the same function. The LED anode of optocoupler U6 is connected to a 24V DC voltage, and the LED cathode of optocoupler U6 is connected to the input terminal of the door closing contact signal module. A resistor R16 is connected for current limiting. The emitter of optocoupler U6 is connected to the ground point, and the collector of optocoupler U6 is connected to chip 11. The door closing contact signal module has three connection terminals. The first connection terminal is connected to a 24V DC voltage, the second... The second connection terminal is connected to the LED cathode of optocoupler U6, and the third connection terminal is connected to the ground point. The connection terminal is connected to the door closing sensor. When the elevator door is not closed, the first and second connection terminals are connected. At this time, the potential of the LED anode and cathode of optocoupler U6 is the same, and optocoupler U6 is disconnected. When the elevator door closes, the door closing sensor switches the second connection terminal to the third connection terminal, and the LED anode and cathode of optocoupler U6 conduct and emit light, triggering the collector and emitter of optocoupler U6 to conduct. Current flows to the ground point, and the voltage of pin 11 of chip is pulled low, reaching the signal input.

[0039] like Figure 6 A capacitor C11 is connected in parallel between the LED anode and cathode of the optocoupler U6. At the same time, a capacitor C10 is connected to the LED cathode of the optocoupler U6, and a capacitor C9 is connected to the collector of the optocoupler U6 to filter out interference and stabilize the signal.

[0040] In this embodiment, four signal input modules 14 are provided. The circuit structures of the signal input modules 14 are all the same and will not be described in detail.

[0041] The serial communication module 15 uses a logic output optocoupler to achieve signal and data communication, such as... Figure 7The serial communication module 15 includes optocoupler U1 and optocoupler U3. Optocouplers U1 and U3 are both ELM600(TA) logic output optocouplers, or they can be replaced with logic output optocouplers of the same function. 3.3V DC voltage is used as the energy source for the signal. The positive terminal of the input of optocoupler U1 is connected to the 3.3V DC voltage, and the negative terminal of the input of optocoupler U1 is connected to the pin of chip 11. The positive terminal of the input of optocoupler U2 is connected to the 3.3V DC voltage, and the negative terminal of the input of optocoupler U2 is connected to the main control system of the freight elevator. When chip 11 communicates with the main control system of the freight elevator, chip 11 sends data. Chip 11 intermittently sends low or high voltage to turn on or off optocoupler U1. The 3.3V DC voltage delivered to the main control system of the freight elevator will be pulled down to 0V due to the conduction of optocoupler U1. The signal above 3V is set as "1" for high voltage and below 1V is set as "0" for low voltage. In this way, data signals can be transmitted for communication.

[0042] In practical use, the freight elevator using the anti-collision control board of this utility model has an electrical box installed on each floor, and the control board is installed inside the electrical box. Sensors are installed on each floor of the freight elevator to detect whether there are people in the elevator. When a person is detected, the sensor transmits the information to the control chip 11 through a signal input circuit. The sensor can be a microwave sensor, which emits microwaves and receives reflected microwaves. When there is a moving target in the detection area, the microwave sensor can detect it and output a signal. Alternatively, the sensor can be an infrared sensor, which detects whether there are people outside the elevator door. When workers are carrying goods and their hands are inconvenient, making it difficult to press the elevator buttons, the microwave sensor detects a person and transmits the information to the control chip 11 through the signal input circuit. The control chip 11 then transmits the information to the main controller through a serial communication circuit, indicating that someone wants to take the elevator. The elevator then goes to that floor to pick up the person.

[0043] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A collision avoidance control board for a freight elevator, characterized in that: The control panel is equipped with Chip (11), the chip (11) is used to receive sensor input signals and output execution signals to the actuator and the main control system for data communication; The power module (12) is connected to an AC power source at its input terminal to convert AC voltage into DC voltage and output it to provide electrical energy and voltage signals. Signal output module (13), which is connected to chip (11), converts the level signal output by chip (11) into an on / off signal output; The signal input module (14) is connected to the chip (11) and converts the on / off signal input by the sensor into a level signal input. A serial communication module (15) is connected to the chip (11) and the main control system respectively for data communication.

2. The anti-collision control board for a freight elevator according to claim 1, characterized in that: The chip (11) is an MCU with the model number CMS32L051QN20.

3. The anti-collision control board for a freight elevator according to claim 1, characterized in that: The power module (12) outputs DC voltages of 24V and 3.3V.

4. The anti-collision control board for a freight elevator according to claim 1, characterized in that: The signal output module (13) includes a signal relay, a first optocoupler and a transistor. The positive terminal of the power supply pin of the signal relay is connected to the DC voltage output by the power supply module (12). The negative terminal of the power supply pin of the signal relay is connected to the collector of the transistor. The emitter of the transistor is connected to the ground point. The base of the transistor is connected to the output terminal of the first optocoupler. The input terminal of the first optocoupler is connected to the pin of the chip (11).

5. The anti-collision control board for a freight elevator according to claim 4, characterized in that: The LED anode of the first optocoupler is connected to the DC voltage output by the power module (12), the cathode of the first optocoupler is connected to the pin of the chip (11), the collector of the first optocoupler is connected to the DC voltage output by the power module (12), and the emitter of the first optocoupler is connected to the base of the transistor.

6. The anti-collision control board for a freight elevator according to claim 5, characterized in that: The signal output module (13) is configured in two quantities, and the signal output module (13) is used for door opening signal output or other purposes.

7. The anti-collision control board for a freight elevator according to claim 1, characterized in that: The signal input module (14) includes a second optocoupler, which is an LTV-354T or other equivalent optocoupler. The input terminal of the second optocoupler is connected to the DC voltage output by the power module (12) and the sensor input terminal, respectively. The output terminal of the second optocoupler is connected to the pin of the chip (11) and the ground point, respectively.

8. The anti-collision control board for a freight elevator according to claim 7, characterized in that: The sensors include a microwave sensor, an infrared sensor, a door closing sensor, and one or more buttons.

9. The anti-collision control board for a freight elevator according to claim 1, characterized in that: The serial communication module (15) includes a third optocoupler, which is an ELM600(TA) or other equivalent optocoupler.

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