Elevator safety control system, elevator and control method

Abstract

The application discloses an elevator safety control system, an elevator and a control method, and relates to the technical field of elevators, and specifically discloses an elevator safety control system, which comprises a power supply, a non-bypass branch, a bypass branch, a safety control module and an execution component. In the safety control module, a switch control unit outputs a state signal of a bypass switch in response to a bypass switch selection operation, a logic circuit performs logical operation on the state signal and a target signal of the bypass branch to obtain an operation result, and an output circuit controls the execution component to perform a safety operation according to the operation result. The switch control unit outputs the state signal of the bypass switch in response to the bypass switch selection operation, and the bypass switch does not need to be bypassed through a bypass switch. The problem that the use of the bypass switch increases cost due to high requirements on specifications and electrical spacing is solved, and the cost of using the bypass switch is reduced.

Description

Technical Field

[0001] The present invention relates to the field of elevator technology, and in particular to an elevator safety control system, an elevator, and a control method. Background Technology

[0002] In elevator control, to ensure elevator safety and maintenance needs, elevator safety control systems are usually equipped with non-bypass switches and bypass switches. The status of the non-bypass switches and bypass switches controls elevator safety actuators such as motors and brakes.

[0003] like Figure 1 This is a schematic diagram of an existing elevator safety control system. A non-bypass branch and multiple bypassable branches are positioned between the power supply and the safety control module. The branch containing the bypass switch has two contacts for bypass short-circuiting. In elevator applications, especially in high-rise buildings, non-bypass switches may be installed on different floors. The line from the non-bypass branch connected to the power supply to the end connected to the safety control system is relatively long. To avoid high voltage loss due to the long line, which could prevent the non-bypass branch from outputting signals to the safety control system, a higher voltage power supply is typically used. For the bypass switch, a higher power supply voltage increases the requirements for the specifications and electrical spacing of the bypass switch, leading to increased costs. Summary of the Invention

[0004] This invention provides an elevator safety control system, an elevator, and a control method to solve the problem that the high requirements for the specifications and electrical spacing of the bypass safety switch in existing elevator safety control systems increase the cost of the bypass safety switch.

[0005] In a first aspect, the present invention provides an elevator safety control system, including a power supply, a non-bypassable branch, at least one bypassable branch, a safety control module, and an execution component. The safety control module includes a logic circuit, a voltage conversion unit, a switch control unit, and an output circuit, all connected to the logic circuit. The power supply is connected to the voltage conversion unit through the non-bypassable branch. One end of each bypassable branch is connected to the logic circuit, and the other end of each bypassable branch is connected to the power supply.

[0006] The voltage conversion unit is used to supply power to the safety control module;

[0007] The switch control unit is used to respond to the bypass switch selection operation and output the status signal of the bypass switch in the bypass branch;

[0008] The bypass branch is used to output the target signal to the logic circuit;

[0009] The logic circuit is used to perform logical operations based on the state signal and the target signal, and output the operation result to the output circuit.

[0010] The output circuit is used to control the execution unit to perform safe operations based on the calculation result.

[0011] Optionally, the safety control module further includes an isolation circuit, through which the bypass branch is connected to the logic circuit.

[0012] Optionally, the output circuit is a circuit that includes isolation devices.

[0013] Optionally, it also includes a processor, and the switch control unit is connected to the logic circuit through the processor;

[0014] The processor is used to perform logical operations based on the status signal and output a first operation result to the logic circuit;

[0015] The logic circuit is used to perform logical operations based on the first operation result to obtain a second operation result, and output the second operation result to the output circuit.

[0016] Optionally, the bypass switch in the bypass branch is the elevator door lock switch.

[0017] Optionally, the actuating component includes at least one of a contactor, a contactor-type relay, a safety circuit, and a programmable electronic safety circuit.

[0018] Secondly, embodiments of the present invention provide an elevator safety control system, including a power supply, a non-bypassable branch, at least one bypassable branch, a safety control module, and an execution component. The safety control module includes a logic circuit, an output circuit, a power switch, and a switch control unit, all connected to the logic circuit. The power supply is connected to the power switch through the non-bypassable branch, and the power switch is connected to the output circuit. One end of each bypassable branch is connected to the logic circuit, and the other end of each bypassable branch is connected to the power supply.

[0019] The switch control unit is used to respond to the bypass switch selection operation and output the status signal of the bypass switch in the bypass branch;

[0020] The bypass branch is used to output the target signal to the logic circuit;

[0021] The logic circuit is used to perform logical operations based on the status signal and the target signal, and to control the power switch to close or open based on the operation result;

[0022] The output circuit is used to control the actuator to perform a safety operation when the non-bypass branch is turned on and the power switch is closed.

[0023] Thirdly, embodiments of the present invention provide an elevator, the elevator including the elevator safety control system described in either the first aspect or the second aspect.

[0024] Fourthly, embodiments of the present invention provide an elevator safety control method, applied to the elevator safety control system described in any one of the first aspects, comprising:

[0025] In response to the bypass switch selection operation, output the status signal of the bypass switch in the bypass branch;

[0026] The result is obtained by performing logical operations based on the state signal and the target signal of the bypassable branch.

[0027] The execution component is controlled to perform safe operations based on the calculation results.

[0028] Fifthly, embodiments of the present invention provide an elevator safety control method, applied to the elevator safety control system described in the second aspect, comprising:

[0029] In response to the bypass switch selection operation, output the status signal of the bypass switch in the bypass branch;

[0030] The result is obtained by performing logical operations based on the state signal and the target signal of the bypassable branch.

[0031] The power switch is controlled to close or open based on the calculation result;

[0032] When the non-bypass branch is turned on and the power switch is closed, the actuator is controlled to perform a safety operation.

[0033] In the safety control module of this invention, the logic circuit draws power from the power supply through a voltage conversion unit and a non-bypass branch. The switch control unit responds to the bypassable switch selection operation and outputs a status signal for the bypassable switch. The logic circuit performs logical operations based on the status signal and the target signal output by the bypassable branch. After outputting the operation result to the output circuit, the output circuit controls the execution unit to perform a safety operation. This achieves the goal of outputting the bypassable switch status signal through the switch control unit in response to the bypassable switch selection operation, eliminating the need to bypass the bypassable switch. This solves the problem of increased costs due to high specifications and electrical spacing requirements associated with using bypass switches, thus reducing the cost of using bypass switches. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a traditional elevator safety control system.

[0035] Figure 2 A schematic diagram of an elevator safety control system provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the logic circuit performing logic operations in an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of an elevator safety control system provided for another embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of an elevator safety control system provided in another embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of an elevator safety control system provided in another embodiment of the present invention;

[0040] Figure 7 This is a flowchart of an elevator safety control method provided in one embodiment of the present invention;

[0041] Figure 8 This is a flowchart of an elevator safety control method provided in another embodiment of the present invention. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0043] like Figure 1 As shown, in traditional elevator safety control systems, the outputs of non-bypassable and bypassable branches are directly input to the safety control module for diagnosis, so that the module can control the actuators. When bypassing, a bypass switch needs to be connected in parallel with the bypassable switch. Typically, two long cables need to be run from the power supply and one end of the bypassable switch to the bypass switch. When there are many non-bypassable switches and long lines in the non-bypassable branches, a high-voltage power supply, such as 36V, 48V, or even higher, is usually used to ensure a sufficiently large voltage signal is input to the safety control module after passing through the non-bypassable branches. This results in excessively high voltage applied to the bypass switch, requiring high specifications for the bypass switch and strict electrical spacing of the connecting cables, thus increasing the cost of the bypass safety switch. To solve these technical problems, this invention provides an elevator safety control system that reduces the cost associated with using bypass safety switches that have high requirements for specifications and electrical spacing.

[0044] Example 1

[0045] Figure 2 This is a schematic diagram of the structure of an elevator safety control system provided in Embodiment 1 of the present invention, as shown below. Figure 2 As shown, the elevator safety control system of this embodiment may include a power supply 1, a non-bypass branch 2, at least one bypassable branch 3, a safety control module 4, and an execution component 5.

[0046] In one embodiment, power supply 1 can be a DC power supply, such as a DC power supply obtained by converting AC power. The voltage of power supply 1 can be 36V, 48V, or even higher. The non-bypass branch 2 can be a branch formed by multiple non-bypass switches in series in the elevator system. The non-bypass switches can be switches that prohibit bypassing. The bypassable branch 3 can be a branch formed by one or more bypassable switches in series in the elevator system. The bypassable switches can be switches that allow bypassing. The number of bypassable branches 3 can be one or more. The safety control module 4 can be a circuit that performs logical operations on the signals output by multiple bypassable branches 3 and the signals output by the switch control unit 42 and outputs the operation result. The execution component 5 can be a component that performs safety operations in the elevator system. In one embodiment, the execution component 5 can be a motor that drives the elevator car, an elevator brake, etc., and can also include components such as audible and visual alarms.

[0047] like Figure 2 As shown, in one embodiment, the safety control module 4 includes a logic circuit 40, a voltage conversion unit 41 connected to the logic circuit 40, a switch control unit 42, and an output circuit 43. The power supply 1 is connected to the voltage conversion unit 41 through a non-bypass branch 2 to supply power to the voltage conversion unit 41. One end of each bypass branch 3 is connected to the logic circuit 40, and the other end of each bypass branch 3 is connected to the power supply 1.

[0048] The voltage conversion unit 41 can be a voltage conversion circuit. The voltage conversion unit 41 is used to supply power to the entire safety control module 4. That is, the voltage conversion unit 41 draws power from the power supply 1 through the non-bypass branch 2 and converts it into the voltage required for the operation of the safety control module 4 to supply power to the various circuit units in the safety control module 4. The voltage conversion unit 41 can be a DC-DC circuit with step-down or step-up functions, such as various Boots and Buck circuits. This embodiment does not limit the specific circuit structure of the voltage conversion unit 41.

[0049] The switch control unit 42 can be used to respond to the bypassable switch selection operation and output the status signal of the bypassable switch in the bypassable branch 3, which indicates whether the bypassable switch needs to be bypassed or not.

[0050] The logic circuit 40 can be an editable logic circuit, such as various existing programmable logic controllers. The logic circuit 40 is used to perform logical operations based on the status signal of the bypass switch and the target signal output by the bypass branch 3, and output the operation result to the output circuit 43. The logical operation can be "AND", "OR", "NOT" or other operations, and the result can be represented by high and low levels. Those skilled in the art can set the operation logic of the logic circuit 40 according to the function of the bypass branch in the elevator system control and the safety control logic.

[0051] like Figure 3 The diagram shows the operational logic of logic circuit 40. For each bypassable switch, the switch control unit responds to the selection operation of the bypassable switch and outputs a status signal for each bypassable switch. Additionally, each bypassable switch is located in a bypassable branch, and each bypassable branch itself outputs a target signal from the power supply to the logic circuit. For a bypassable branch, the final output signal of the bypassable branch can be determined by the status signal of the bypassable switch output by the switch control unit and the target signal. The final output signals of multiple bypassable branches are then subjected to logical operations to obtain the calculation result. Figure 3 Taking the bypass branch containing bypass switch 11 and bypass branch containing bypass switch 12 as examples, when bypass switch 11 needs to be in bypass state, bypass switch 11 can be selected by switch control unit 42 so that switch control unit 42 outputs a status signal of bypass switch 11 of 1, indicating that bypass switch 11 needs to be bypassed. By not selecting bypass switch 12 by switch control unit 42, the status signal of bypass switch 12 of switch control unit 42 of bypass switch 12 of 0 is output by switch control unit 42, indicating that bypass switch 12 does not need to be bypassed. For the branch containing bypass switch 11, since the status signal of bypass switch 11 output by switch control unit 42 of bypass switch 11 of 1, whether bypass switch 11 is closed or open, the target signal of bypass switch 11 of bypass switch 11 is 1 or 0. After the status signal and the target signal are calculated, the output is 1. That is, the final output signal of bypass branch containing bypass switch 11 of bypass switch 11 is 1, that is, the status signal output by switch control unit is the main signal. Similarly, the final output signal of bypass branch containing bypass switch 12 of ...

[0052] The output circuit 43 can be used to control the execution unit 5 according to the calculation result, so that the execution unit 5 performs a safety operation. For example, the output circuit 43 can be a circuit that outputs high and low levels as control signals, so that the execution unit 5 performs a safety operation when it receives high and low level signals. Of course, the output circuit 43 can also be a circuit that directly outputs a preset current, so as to drive the execution unit 5 to perform a safety operation through the current. For example, it can output current to the coil of the brake contactor, so that the contactor engages and applies the brake.

[0053] like Figure 4 As shown, the safety control module 4 also includes an isolation circuit 44. The bypass branch 3 is connected to the logic circuit 40 through the isolation circuit 44. The isolation circuit 44 can be a circuit used to isolate the signal output by the bypass branch 3 and output the target signal to the logic circuit 40. For example, the isolation circuit 44 can be a circuit including isolation devices such as optocouplers, capacitor isolators, transformers, and relays. The isolation circuit 44 can improve the stability of the target signal output by the bypass branch 3 to the logic circuit 40, prevent the logic circuit 40 from receiving interference signals, and improve the reliability of the safety control module.

[0054] In an optional embodiment, the output circuit 43 may be a circuit that includes isolation devices, such as an output circuit that includes electronic devices such as optocouplers, isolation capacitors, and isolation transformers, so that the output circuit 43 is connected to the logic circuit 40 through the isolation devices, thereby improving the anti-interference performance of the output circuit 43.

[0055] like Figure 4 As shown, taking the bypass switch in one of the bypassable branch circuits as an example of the elevator door lock, the actuator 5 may include an elevator contactor and a brake contactor, and its specific working principle is as follows:

[0056] A non-bypass branch can be an elevator's safety circuit, in one situation where the safety circuit is abnormally disconnected, i.e. Figure 4 When the non-bypass branch 2 in the power supply is disconnected, the voltage of the power supply 1 cannot be output to the voltage conversion unit 41 through the non-bypass branch 2. The voltage conversion unit 41 cannot supply power to the safety control module 4, the entire safety control module 4 loses power, the output circuit 43 has no signal output to the elevator contactor and the brake contactor, the coils of the elevator contactor and the brake contactor are de-energized, the elevator contactor and the brake contactor are disconnected, the motor and the brake coil are de-energized, the motor stops rotating and the elevator brake is engaged, thus realizing the stopping of the elevator car movement by brake in case of abnormality.

[0057] In another scenario, when the safety circuit is functioning correctly, i.e. Figure 4The non-bypassable branch is turned on, and the voltage of power supply 1 is output to voltage conversion unit 41 through non-bypassable branch 2. Voltage conversion unit 41 supplies power to safety control module 4. When the car moves unexpectedly after leveling and the emergency brake is applied, in case of emergency rescue or maintenance, the switch control unit 42 selects the door lock to bypass. The switch control unit 42 outputs the status signal of the selected door lock that needs to be bypassed. The logic circuit 40 performs logical operations based on the target signal of the bypassable branch where the door lock is located and the status signal of the selected door lock, and outputs the operation result to output circuit 43. Output circuit 43 outputs control signals to control the motor operation and release the brake, so that the coils of elevator contactor and brake contactor are energized, and elevator contactor and brake contactor are closed, so that the elevator releases the brake and moves the elevator car to the level position for rescue.

[0058] In the safety control module of this invention, the logic circuit draws power from the power supply through a voltage conversion unit and a non-bypass branch. The switch control unit responds to the bypassable switch selection operation and outputs a status signal for the bypassable switch. The logic circuit performs logical operations based on the status signal and the target signal output by the bypassable branch. After outputting the operation result to the output circuit, the output circuit controls the execution unit to perform a safety operation. This achieves the goal of outputting the status signal of the bypassable switch through the switch control unit in response to the bypassable switch selection operation, eliminating the need to bypass the bypassable switch. This solves the problem of increased costs due to high specifications and electrical spacing requirements associated with using bypass switches, thus reducing the cost of using bypass switches.

[0059] like Figure 5 As shown, in one embodiment, the safety control module 4 may further include a processor 45. The switch control unit 42 is connected to the logic circuit 40 through the processor 45. The processor 45 performs logical operations on the status signals of the bypassable switches and outputs a first operation result to the logic circuit 40. The logic circuit 40 performs logical operations on the first operation result to obtain a second operation result and outputs it to the output circuit 43. For example, when there are many bypassable branches, the processor 45 can perform logical operations on the status signals and target signals of each bypassable switch to obtain the final output signal of each bypassable branch. The logic circuit 40 performs logical operations on the final output signal of each bypassable branch to obtain the final operation result. By setting the processor 45, when there are many bypassable branches 3, the processor 45 can perform logical operations on multiple bypassable branches 3, avoiding the need to design a complex logic circuit 40 to perform logical operations when there are multiple bypassable branches, thus reducing the complexity of the logic circuit.

[0060] Of course, the processor 45 can perform logical operations on the status signals and target signals of all bypassable switches of bypassable branch 3, that is, the processor 45 replaces the logic circuit 40. In another example, the processor 45 can perform logical operations on the status signals and target signals of some bypassable switches of bypassable branch 3 and output signals to the logic circuit 40. The logic circuit 40 performs logical operations on the status signals and target signals of other bypassable switches of bypassable branch 3 and then performs logical operations again in combination with the signals output by the processor 45 to obtain the final calculation result.

[0061] Example 2

[0062] like Figure 6 The image shows an elevator safety control system according to Embodiment 2 of the present invention. Figure 6 As shown, the elevator safety control system includes a power supply 1, a non-bypass branch 2, at least one bypassable branch 3, a safety control module 4, and an execution component 5. The safety control module 4 includes a logic circuit 40, an output circuit 43, a power switch 46, and a switch control unit 42, all connected to the logic circuit 40. One end of each bypassable branch 3 is connected to the logic circuit 40, and the other end of each bypassable branch 3 is connected to the power supply 1. Figure 2 Unlike the elevator safety control system in this case, power supply 1 is connected to power switch 46 through non-bypass branch 2, and power switch 46 is connected to output circuit 43.

[0063] same Figure 2 In the elevator safety control system, the switch control unit 42 is used to respond to the bypass switch selection operation and output the status signal of the bypass switch in the bypass branch 3. The bypass branch 3 outputs the target signal to the logic circuit 40. The logic circuit 40 is used to perform logical operations based on the status signal and the target signal output by the bypass branch 3. The logic circuit 40 controls the power switch 46 to close or open according to the operation result. When the non-bypass branch 2 is turned on and the power switch 46 is closed, the output circuit 43 controls the execution component 5 to perform a safety operation.

[0064] Specifically, the power switch 46 can be various electronic switches, such as MOSFETs, transistors, relays, etc. The control terminal of the power switch 46 is connected to the logic circuit 40. The power input terminal of the power switch 46 is connected to the power supply 1 through the non-bypass branch 2. The power output terminal of the power switch 46 is connected to the output circuit. In this embodiment, the circuit units in the safety control module 4 other than the output circuit 43 can be powered by other power supply circuits. Figure 2Compared to the elevator safety control system in the previous embodiment, the elevator safety control system in this embodiment not only eliminates the need for a bypass safety switch to reduce costs, but also allows the power switch 46 to be driven by the logic circuit 40 to directly power the output circuit 43. The output circuit 43 is not connected to the logic circuit 40, and the output circuit does not need to be equipped with isolation devices, simplifying the structure of the output circuit. Furthermore, the output circuit 43 controls the execution component 5 when the non-bypass branch 2 is conducting and the power switch 46 is closed, and stops controlling the execution component 5 when the non-bypass branch 2 is open or the power switch 46 is open, making its performance more reliable.

[0065] Example 3

[0066] Figure 7 This is a flowchart of an elevator safety control method provided in Embodiment 3 of the present invention. The elevator safety control method of this embodiment is applicable to the elevator safety control system of Embodiment 1. This method can be executed by the elevator safety control system of Embodiment 1, such as... Figure 7 As shown, the elevator safety control method of this embodiment of the invention may specifically include the following steps:

[0067] S701 responds to the bypass switch selection operation and outputs the status signal of the bypass switch in the bypass branch.

[0068] like Figure 2 As shown, the elevator safety control system of this embodiment may include a power supply 1, a non-bypass branch 2, at least one bypassable branch 3, a safety control module 4, and an execution component 5. The safety control module 4 includes a logic circuit 40, a voltage conversion unit 41 connected to the logic circuit 40, a switch control unit 42, and an output circuit 43. The power supply 1 is connected to the voltage conversion unit 41 through the non-bypass branch 2. One end of each bypassable branch 3 is connected to the logic circuit 40, and the other end of each bypassable branch 3 is connected to the power supply 1.

[0069] The switch control unit 42 can respond to the bypass switch selection operation by outputting a status signal of the bypass switch. This status signal indicates whether the selected bypass switch needs to be bypassed or not. The bypass switch selection operation can be a manual selection operation of the bypass switch, or it can be triggered by data detected by a sensor. For example, the displacement of the car can be detected by the car position sensor. If the distance of the car position movement is detected to be greater than a threshold when the car is level, the elevator door lock of the level floor is selected.

[0070] S702. Perform logical operations based on the status signal and the target signal of the bypass branch to obtain the operation result.

[0071] For each bypassable branch, the power supply outputs a signal to the logic circuit after passing through the bypassable branch. At the same time, the switch control unit 42 also outputs the status signals of each bypassable switch to the logic circuit. The logic circuit can perform logical operations on the status signals and the signals output by the bypassable branches.

[0072] like Figure 3 The diagram shows the operational logic of logic circuit 40. For each bypassable switch, the state signal of each bypassable switch is output through the selection operation of the switch control unit. In addition, the bypassable switch is located in the bypassable branch, and it will also output a target signal from the power supply to the logic circuit. For a bypassable branch, the final output signal of the bypassable branch can be determined by the state signal of the bypassable switch and the target signal output by the switch control unit. The final output signals of multiple bypassable branches are then subjected to logical operations to obtain the operation result, and the operation result is output to the output circuit 43.

[0073] S703: Control the execution unit to perform safe operations based on the calculation results.

[0074] The calculation result can be represented by high and low levels and output to the output circuit 43. The output circuit 43 controls the execution component 5 to perform safety operations. In one example, the execution component 5 may include an elevator contactor and a brake contactor. The bypass switch may be a door lock switch to enable the drive motor to stop working and the brake to be applied when the elevator car moves unexpectedly when leveling.

[0075] In the elevator safety control system applied in this embodiment, the logic circuit draws power from the power supply through a voltage conversion unit and a non-bypass branch. The switch control unit responds to the bypass switch selection operation and outputs the status signal of the bypass switch. The logic circuit performs logical operations based on the status signal and the target signal output by the bypass branch. After outputting the operation result to the output circuit, the output circuit controls the execution component to perform a safety operation. This achieves the goal of outputting the status signal of the bypass switch through the switch control unit in response to the bypass switch selection operation, eliminating the need to bypass the bypass switch. This solves the problem of increased costs caused by high specifications and electrical spacing requirements when using bypass switches, and reduces the cost of using bypass switches.

[0076] Example 4

[0077] Figure 8 This is a flowchart of an elevator safety control method provided in Embodiment 4 of the present invention. The elevator safety control method of this embodiment is applicable to the elevator safety control system of Embodiment 2, and the method can be executed by the elevator safety control system of Embodiment 2. Figure 8 As shown, the elevator safety control method of this embodiment of the invention may specifically include the following steps:

[0078] S801 responds to the bypass switch selection operation and outputs the status signal of the bypass switch in the bypass branch.

[0079] like Figure 6 As shown, the elevator safety control system of this embodiment may include a power supply 1, a non-bypass branch 2, at least one bypassable branch 3, a safety control module 4, and an execution component 5. The safety control module 4 includes a logic circuit 40, an output circuit 43, a power switch 46 and a switch control unit 42, all of which are connected to the logic circuit 40. One end of each bypassable branch 3 is connected to the logic circuit 40, and the other end of each bypassable branch 3 is connected to the power supply 1. The power supply 1 is connected to the power switch 46 through the non-bypass branch 2, and the power switch 46 is connected to the output circuit 43.

[0080] The switch control unit 42 can respond to the bypass switch selection operation by outputting a status signal of the bypass switch. This status signal indicates whether the selected bypass switch needs to be bypassed or not. The bypass switch selection operation can be a manual selection operation of the bypass switch, or it can be triggered by data detected by a sensor. For example, the displacement of the car can be detected by the car position sensor. If the distance of the car position movement is detected to be greater than a threshold when the car is level, the elevator door lock of the level floor is selected.

[0081] S802. Perform logical operations based on the status signal and the target signal of the bypass branch to obtain the operation result.

[0082] For each bypassable branch, the power supply outputs a signal to the logic circuit after passing through the bypassable branch. At the same time, the switch control unit 42 also outputs the status signals of each bypassable switch to the logic circuit. The logic circuit can perform logical operations on the status signals and the signals of the bypassable branches.

[0083] like Figure 3 The diagram shows the operational logic of logic circuit 40. For each bypassable switch, the state signal of each bypassable switch is output through the selection operation of the switch control unit. In addition, the bypassable switch is located in the bypassable branch, and it will also output a target signal from the power supply to the logic circuit. For a bypassable branch, the final output signal of the bypassable branch can be determined by the state signal of the bypassable switch and the target signal output by the switch control unit. The final output signals of multiple bypassable branches are then subjected to logical operations to obtain the operation result, and the operation result is output to the output circuit 43.

[0084] S803: Control the power switch to close or open based on the calculation result.

[0085] Specifically, the power switch 46 can be various electronic switches, such as MOSFETs, transistors, relays, etc. The control terminal of the power switch 46 is connected to the logic circuit 40. The power input terminal of the power switch 46 is connected to the power supply 1 through the non-bypass branch 2. The power output terminal of the power switch 46 is connected to the output circuit. The logic circuit 40 can control the power switch 46 to close or open through the control terminal of the power switch 46.

[0086] S804. When the non-bypass branch is open and the power switch is closed, the control actuator performs a safe operation.

[0087] The elevator safety control system used in this embodiment realizes that the status signal of the bypass switch is output by the switch control unit in response to the bypass switch selection operation. There is no need to bypass the bypass switch, which solves the problem of increased cost caused by the high specifications and electrical spacing requirements of the bypass switch. The cost of using the bypass switch is reduced. Furthermore, the power switch 46 can be driven by the logic circuit 40 to directly power the output circuit 43. The output circuit 43 is not connected to the logic circuit 40, and there is no need to set up an isolation circuit in the output circuit, which simplifies the output circuit structure and makes its performance more reliable.

[0088] It should be noted that, for the method embodiments, since they are basically similar to the system embodiments and have corresponding beneficial effects, the description is relatively simple, and relevant parts can be referred to the description of the system embodiments.

[0089] The present invention also provides an elevator, which includes the elevator safety control system provided in any one of the embodiments of Embodiment 1 and Embodiment 2, and has the corresponding technical effects.

[0090] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the test report generation method described in the various embodiments of the present invention.

[0091] It is worth noting that in the embodiments of the above test report generation system, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0092] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An elevator safety control system, characterized in that, The device includes a power supply, a non-bypassable branch, at least one bypassable branch, a safety control module, and an execution component. The safety control module includes a logic circuit, a voltage conversion unit, a switch control unit, and an output circuit. The voltage conversion unit, the switch control unit, and the output circuit are all connected to the logic circuit. The power supply is connected to the voltage conversion unit through the non-bypassable branch. One end of each bypassable branch is connected to the logic circuit, and the other end of each bypassable branch is connected to the power supply. The voltage conversion unit is used to supply power to the safety control module; The switch control unit is used to respond to the bypass switch selection operation and output the status signal of the bypass switch in the bypass branch; The bypass branch is used to output a target signal to the logic circuit; the logic circuit is used to perform logical operations based on the state signal and the target signal, and output the operation result to the output circuit. The output circuit is used to control the execution unit to perform safe operations based on the calculation result.

2. The elevator safety control system according to claim 1, characterized in that, The safety control module also includes an isolation circuit, through which the bypass branch is connected to the logic circuit.

3. The elevator safety control system according to claim 1, characterized in that, The output circuit is a circuit that includes isolation devices.

4. The elevator safety control system according to claim 1, characterized in that, It also includes a processor, and the switch control unit is connected to the logic circuit through the processor; The processor is used to perform logical operations based on the status signal and output a first operation result to the logic circuit; The logic circuit is used to perform logical operations based on the first operation result to obtain a second operation result, and output the second operation result to the output circuit.

5. The elevator safety control system according to any one of claims 1-4, characterized in that, The bypass switch in the bypass branch is the elevator door lock switch.

6. The elevator safety control system according to any one of claims 1-4, characterized in that, The actuating component includes at least one of a contactor, a contactor-type relay, a safety circuit, and a programmable electronic safety circuit.

7. An elevator safety control system, characterized in that, The device includes a power supply, a non-bypassable branch, at least one bypassable branch, a safety control module, and an execution component. The safety control module includes a logic circuit, an output circuit, a power switch, and a switch control unit. The power switch and the switch control unit are both connected to the logic circuit. The power supply is connected to the power switch through the non-bypassable branch. The power switch is connected to the output circuit. One end of each bypassable branch is connected to the logic circuit, and the other end of each bypassable branch is connected to the power supply. The switch control unit is used to respond to the bypass switch selection operation and output the status signal of the bypass switch in the bypass branch; The bypass branch is used to output the target signal to the logic circuit; The logic circuit is used to perform logical operations based on the status signal and the target signal, and to control the power switch to close or open based on the operation result; The output circuit is used to control the actuator to perform a safety operation when the non-bypass branch is turned on and the power switch is closed.

8. An elevator, characterized in that, The elevator includes the elevator safety control system as described in any one of claims 1-7.

9. An elevator safety control method, characterized in that, The elevator safety control system according to any one of claims 1-6 comprises: In response to the bypass switch selection operation, output the status signal of the bypass switch in the bypass branch; The result is obtained by performing logical operations based on the state signal and the target signal of the bypassable branch. The execution component is controlled to perform safe operations based on the calculation results.

10. An elevator safety control method, characterized in that, The elevator safety control system described in claim 7 includes: In response to the bypass switch selection operation, output the status signal of the bypass switch in the bypass branch; The result is obtained by performing logical operations based on the state signal and the target signal of the bypassable branch. The power switch is controlled to close or open based on the calculation result; When the non-bypass branch is turned on and the power switch is closed, the actuator is controlled to perform a safety operation.

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