A performance test system for elevator emergency rescue device

Abstract

The utility model discloses a kind of performance test system of elevator power failure emergency rescue device, including control acquisition module, to load module and man-machine interaction module.The control acquisition module includes MCU main control chip, voltage sampling module, switch module and power module, according to the signal of man-machine interaction module, control switch module completes the state transformation of conduction and cut-off, and receives the sampling data of voltage sampling module, carries out threshold value judgment and logic analysis, obtains the performance test result of the ARD to be measured, and returns to man-machine interaction module and shows.The switch module is arranged between three-phase power grid, the ARD to be measured and power module.The power module simulates the battery for the ARD to be measured when three-phase power grid anomaly supplies power.The load module to load simulates elevator car consumption ARD output electrical energy.The man-machine interaction module is used to show the ARD performance test result returned by control acquisition module.

Description

Technical Field

[0001] This utility model belongs to the field of measurement and control technology, specifically relating to a factory performance testing device for an elevator power outage emergency rescue device. Background Technology

[0002] The elevator emergency power rescue device (ARD) is a backup emergency power system designed to respond to sudden power outages or malfunctions in elevators. Its basic working principle is to provide emergency power, including a charger, battery, and inverter, with automatic power switching achieved through static point isolation technology. When the mains power supply is normal, the ARD operates in standby mode, charging the battery. After a power outage, the ARD automatically enters inverter mode, providing three-phase emergency power to the elevator control system. Driven by the emergency power, the elevator's drive system and door operator can continue to operate, allowing the car to slowly move to the nearest leveling position at a low speed. When the mains power is restored, the ARD automatically returns to standby charging mode, preparing for the next possible failure. It can be seen that the ARD plays a crucial role in elevator power outage rescue; therefore, the performance of the ARD is of great significance to the safe rescue of elevators.

[0003] Prior art 1 (CN219641881U) discloses an elevator power outage emergency rescue device and a magnetic latching relay contact adhesion detection circuit. It uses an output pulse current signal to switch the switching state of the magnetic latching relay in the main circuit and detects whether the input circuit of the optocoupler isolation circuit generates a feedback signal to determine whether the magnetic latching relay contacts in the ARD (Automatic Retrieval System) are stuck. Prior art 2 (CN114994562A) discloses a test circuit, test method, and test equipment. It uses a control module to control a switching module, disconnecting the three-phase 380V AC power from the ARD under test, and detects the ARD's performance under power outage conditions. By collecting and analyzing the data from the ARD under test, it achieves automated testing of the elevator emergency rescue device's reliability, stability, and battery life.

[0004] The above solutions are all for performance testing of ARDs already in use. However, to ensure the safe and stable operation of ARDs in elevator applications, their basic logic functions and output voltage status need to be tested before they leave the factory. When testing whether the ARD can switch states according to different power grid conditions, it needs to be connected to a three-phase 380V AC power supply. Manual testing poses a significant safety hazard.

[0005] In summary, existing technologies lack a method for testing the factory performance of elevator power outage emergency rescue devices. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention proposes a factory performance testing system for elevator power outage emergency rescue devices. By using an embedded system to control the switching circuit and data acquisition, the system automates the factory performance testing of the elevator power outage emergency rescue device. Furthermore, it allows for command input via a human-machine interface module to meet the testing requirements of different ARD (Automatic Rescue Device) models.

[0007] A factory performance testing system for an elevator power outage emergency rescue device includes a control and acquisition module, a load-bearing module, and a human-machine interaction module.

[0008] The control and acquisition module includes an MCU main control chip, a voltage sampling module, a switching module, and a power supply module.

[0009] The MCU main control chip outputs control commands based on the signals from the human-machine interaction module, controls the switch module to complete the state transition between conduction and cutoff, receives the sampling data from the voltage sampling module, performs threshold judgment and logic analysis, obtains the performance test results of the ARD under test, and returns them to the human-machine interaction module for display.

[0010] The voltage sampling module is used to collect the output voltage of the three-phase power grid, the output voltage of the power supply module, and the output voltage of the ARD under test, and transmit the collected data to the ADC sampling port of the MCU main control chip.

[0011] The switching module is located between the output terminal of the three-phase power grid and the power grid input terminal of the ARD under test, and between the output terminal of the power supply module and the battery terminal of the ARD under test.

[0012] The power module is used to simulate the battery in the elevator power outage emergency rescue device, and to simulate the battery supplying power to the ARD under test when the three-phase power grid is abnormal.

[0013] The load-bearing module is connected to the output port of the ARD under test, simulating the elevator car consuming the electrical energy output by the ARD under test.

[0014] The human-computer interaction module is used to display the test results of the ARD performance under test returned by the control acquisition module.

[0015] Preferably, the human-machine interaction module displays the wiring information between the control acquisition module, the load support module, and the ARD under test via a screen display.

[0016] Preferably, the human-computer interaction module indicates the detection result using LED lights.

[0017] Preferably, the human-machine interface module is used to input the voltage threshold range of the ARD under test and the battery power supply voltage, and transmit them to the MCU main control chip to change the threshold judgment standard of the MCU main control chip and the output voltage value of the power supply module.

[0018] This utility model has the following beneficial effects:

[0019] The device is easy to operate. After the ARD program is programmed, the operator only needs to press the corresponding button according to the model of the ARD to be tested to switch programs and complete the automated performance testing process of the ARD. Attached Figure Description

[0020] Figure 1 A block diagram of a factory performance testing system for an elevator power outage emergency rescue device;

[0021] Figure 2 This is a schematic diagram of the MCU main control chip in the embodiment;

[0022] Figure 3 This is a schematic diagram of the resistor voltage divider sampling circuit in the embodiment;

[0023] Figure 4 This is a schematic diagram of the voltage detection circuit at the RT and RN terminals of the ARD under test in the embodiment.

[0024] Figure 5 The circuit diagram of the switching module between the three-phase power grid and the ARD under test is shown in the embodiment. Detailed Implementation

[0025] The present invention will be further explained below with reference to the accompanying drawings;

[0026] like Figure 1 As shown, a factory performance testing system for an elevator power outage emergency rescue device includes a control and acquisition module, a load-bearing module, and a human-machine interaction module.

[0027] The control and acquisition module includes an MCU main control chip, a voltage sampling module, a switching module, and a power supply module.

[0028] like Figure 2 As shown, the MCU main control chip outputs control commands based on signals from the human-machine interface module, controlling the switch module to complete the on / off state transitions, and receives sampling data from the voltage sampling module, performs threshold judgment and logic analysis to obtain the performance test results of the ARD under test, which are then returned to the human-machine interface module for display. Pins 4, 29, and 39 of the MCU main control chip U43 are connected to the phase sequence short-circuit signal port, start signal port, and stop signal port of the ARD under test, respectively. Pin 40 of the MCU main control chip is connected to the control circuit of the manual power-off relay J2, and the two ends of the output circuit of the manual power-off relay J2 are connected to the manual power-off signal port of the ARD under test.

[0029] The voltage sampling module uses multiple resistor divider circuits to collect the output voltage of the power supply module, the line voltage of the three-phase power grid L1L2, the phase voltage of L1N, and the RS, RT, and RN terminal voltages of the ARD under test, and transmits the collected voltage values ​​to the ADC sampling port of the MCU main control chip. Figure 3 As shown, one end of the second and eighth resistors R2 and R8 are connected to L1 and L2 of the three-phase power grid, respectively, for initial voltage division and attenuation. The other end of the second resistor R2 is connected to the inverting input of the operational amplifier chip U1A, and the other end of the eighth resistor R8 is connected to the non-inverting input of the operational amplifier chip U1A, thereby realizing differential sampling of the line voltages of the three-phase power grid L1 and L2. The 3V reference voltage is connected to the non-inverting input of the operational amplifier chip U1A through the thirteenth resistor R13. One end of the fifth capacitor C5 and the fourteenth resistor R14 are connected to the non-inverting input of the operational amplifier chip U1A, and the other end is grounded to suppress high-frequency noise. The first capacitor C1 and the first resistor R1 are connected across the inverting input and output of the operational amplifier chip U1A to realize an active low-pass filter and proportional amplifier circuit, used to stabilize the signal and amplify the differential signal at a fixed gain. The output of the operational amplifier chip U1A is connected to one end of the fifth resistor R5. The other end of the fifth resistor R5 is grounded through the fourth capacitor C4 and connected to pin 8 of the MCU main control chip U43. By filtering the output of the operational amplifier chip U1A, the signal transmitted from the voltage sampling module to the MCU main control chip is ensured to be stable.

[0030] Similarly, when acquiring the phase voltage of L1N, the L1 phase of the three-phase power grid is connected to the inverting input of the operational amplifier chip through a voltage divider resistor, the neutral line is connected to the non-inverting input of the operational amplifier chip through a voltage divider resistor, and the output of the operational amplifier chip is connected to pin 10 of the MCU main control chip U43. When acquiring the output voltage of the power supply module, the positive and negative terminals of the power supply are connected to the non-inverting and inverting inputs of the operational amplifier chip, respectively, and the output of the operational amplifier chip is connected to pin 14 of the MCU main control chip U43. When acquiring the output voltage of the ARD under test, the S, T, and N terminals are connected to the inverting input of the operational amplifier chip in the resistor divider circuit, the R terminal is connected to the non-inverting input of the operational amplifier chip, and the output of the operational amplifier chip is connected to the ADC sampling port of the MCU main control chip.

[0031] As a preferred solution, multiple resistors are connected in series between the phase lines of the three-phase power grid and the input terminal of the voltage sampling module to attenuate the phase voltage value.

[0032] As a preferred solution, the ADC sampling port of the MCU main control chip U43 is connected to the Zener diode D1. The bidirectional voltage regulation structure clamps the input voltage obtained by the ADC sampling port within the range of ±3.3V, preventing peak voltage from damaging the analog-to-digital conversion module of the MCU main control chip U43.

[0033] As a preferred solution, considering the limited resources of the ADC sampling port on the MCU main control chip, and the generally stable voltages of the RT and RN terminals of the ARD, the actual voltage values ​​of RT and RN are not measured. Instead, the high and low levels are detected to determine the output status of RT and RN. Figure 4 As shown, when judging the output of the RT terminal, the R terminal of the ARD under test is connected to the coil of the 380V contactor KM1 through the first output circuit of relay J1. The control circuit of relay J1 receives the control signal output from pin 38 of the MCU main control chip U43 to control the on / off state of the output circuit. The other end of the coil of contactor KM1 is connected to the T terminal of the ARD under test. The input contact of contactor KM1 is connected to a 3.3V voltage, and the output contact is connected to pin 55 of the MCU main control chip U43. When the output circuit of relay J1 is on, if the voltage between RT reaches 380V, the coil of contactor KM1 will be energized, making the input and output contacts conduct, and the I / O port of the MCU main control chip detects a high level. If the voltage between RT does not reach 380V, the I / O port of the MCU main control chip detects a low level. Thus, the detection of the RT and RN output status is achieved using ordinary I / O ports, saving ADC sampling resources.

[0034] Similarly, when determining the output of the RN terminal, the R terminal of the ARD under test is connected to the coil of the 220V contactor KM2 through the second output circuit of relay J1, and the N terminal is connected to the other end of the contactor KM2 coil. The input and output contacts of contactor KM2 are connected to the 3.3V voltage and pin 56 of the MCU main control chip U43, respectively.

[0035] The switching module includes multiple contactors, relays, and a diode, positioned between the output of the three-phase power grid and the power grid input of the ARD under test, and between the output of the power supply module and the battery terminal of the ARD under test. Specifically, as shown... Figure 5As shown, the phase and neutral lines of the three-phase power grid are connected to the input terminal of the ARD under test via the contacts of contactor KM3. One end of the coil of contactor KM3 is connected to one phase line of the three-phase power grid, and the other end is connected to the other phase line of the three-phase power grid via the output circuit of relay J3. The control circuit of relay J3 receives the control signal from pin 44 of the MCU main control chip. A contactor KM4 and a diode D2 are connected in parallel between the output terminal of the power module and the battery terminal of the ARD under test. The output terminal of the power module is connected to the battery terminal of the ARD under test via the contacts of contactor KM4. One end of the coil of contactor KM4 is connected to one phase line of the three-phase power grid, and the other end is connected to the neutral line of the three-phase power grid via the output circuit of relay J4. The control circuit of relay J4 receives the control signal from pin 41 of the MCU main control chip. The positive terminal of diode D2 is connected to the output terminal of the power module, and the negative terminal is connected to the battery terminal of the ARD under test. This prevents current from flowing back into the power module and damaging the power supply when the ARD under test is charging. When the power module is outputting, the contactor coil is closed, and diode D2 is short-circuited to ensure that diode D2 is not damaged.

[0036] The power module is used to simulate the battery in the elevator power outage emergency rescue device, and to simulate the battery supplying power to the ARD under test when the three-phase power grid is abnormal.

[0037] As a preferred embodiment, to meet the battery voltage requirements of different ARD models under test, the power supply module includes multiple switching power supplies with different output voltages. The output terminal of each switching power supply is connected to the contactor KM4 near the positive terminal of diode D2 via contactor contacts. One end of the contactor coil is connected to a phase line of the three-phase power grid, and the other end is connected to the neutral line of the three-phase power grid via the output circuit of a relay. The control circuit of the relay receives control signals from the I / O output of the MCU main control chip. The MCU main control chip outputs signals to control the on / off state of the relay, thereby connecting the ARD under test to different switching power supplies and enabling adjustable output voltage of the power supply module. In this embodiment, pins 37, 50, and 53 of the MCU main control chip U43 are used to control the on / off state of the relays at the output terminals of different switching power supplies.

[0038] As a preferred option, the output of each switching power supply can be directly connected to the contactor KM4 via the switching power supply, and the output voltage of the power module can be controlled by manually opening and closing it.

[0039] The load-supporting module is connected to the output port of the ARD under test, simulating the consumption of electrical energy output by the ARD under test by an elevator car. Existing load-supporting modules can have their power adjusted via a frequency converter to accommodate variations in the rated output power of different ARD models, which will not be elaborated upon here.

[0040] The human-machine interaction module displays the control acquisition module, the wiring information between the load module and the ARD under test on the screen, as well as the performance test results of the ARD under test returned by the control acquisition module.

[0041] As a preferred embodiment, to enhance the readability of the test results, the human-machine interaction module also includes an LED array. When all performance tests of the ARD under test are passed, pin 26 of the MCU main control chip U43 outputs a signal to drive the green LED to light up; otherwise, pin 27 outputs a signal to drive the red LED to light up.

[0042] As a preferred embodiment, the human-machine interaction module inputs the voltage threshold range of the ARD under test and the battery power supply voltage through the host computer, and transmits them to the MCU main control chip through the RS485 serial communication protocol, thereby changing the threshold judgment standard of the MCU main control chip and the output voltage value of the power supply module.

[0043] As a preferred embodiment, the human-machine interaction module further includes a test switch button circuit and a test reset switch button circuit, which respectively detect the test start signal and the test reset signal through pins 3 and 30 of the MCU main control chip U43.

[0044] The following uses the 11kW power frequency ARD of HL-ARD-1K36I / T as an example to illustrate the working principle of a factory performance testing system for an elevator power outage emergency rescue device:

[0045] Step 1: Use the human-machine interface module to view the factory operation instructions for HL-ARD-1K36I / T and complete the connection between the factory performance test system and the ARD under test.

[0046] Step 2: Press the test start button. Pin 3 of the MCU main control chip U43 receives the signal and proceeds to Step 3 to start the test process.

[0047] Step 3: Pin 44 of the MCU main control chip U43 outputs a control signal to activate the output circuit of relay J3, causing the contacts of contactor KM3 to close, connecting the three-phase power grid to the input terminal of the ARD under test. Pin 41 of the MCU main control chip U43 outputs a control signal to deactivate the output circuit of relay J4, causing the contacts of KM4 to open, preventing the output current of the ARD under test from flowing back into the power module. Pin 40 of the MCU main control chip U43 outputs a control signal to activate the output circuit of manual power-off relay J2, shorting the manual power-off signal port of the ARD under test. Pin 38 of the MCU main control chip U43 outputs a control signal to activate the first and second output circuits of relay J1, causing the contacts of contactors KM1 and KM2 to close.

[0048] The voltage sampling module automatically samples the line voltage of the three-phase power grid L1L2, the phase voltage of L1N, the output voltage of the power supply module, the RS terminal voltage of the ARD under test, and the output status of the RT and RN terminals of the ARD under test, and transmits them to the MCU main control chip.

[0049] When the MCU main control chip detects that the line voltage of L1L2 is 360VAC~430VAC, the phase voltage of L1N is 210VAC~250VAC, the RS voltage range of the ARD under test is 360VAC~430VAC, and the power module output voltage is 35VDC~40VDC, and the MCU main control chip detects a high level at pins 55 and 56, it determines that the charging status and performance of the ARD under test are normal, and proceeds to step 4; otherwise, the test stops, and the MCU main control chip drives the red LED to light up. After the operator removes the defective product, they press the reset button to return to step 1.

[0050] Step 4: Open the contacts of control contactor KM3, disconnect the output circuit of control relay J1, and close the contacts of control KM4 to short-circuit diode D2, connecting the power module to the battery terminal of the ARD under test. After the output of the ARD under test stabilizes, close the output circuit of control relay J1, causing the contacts of contactors KM1 and KM2 to close.

[0051] When pins 4, 29, and 56 of the MCU main control chip U43 detect a high level, and pin 55 detects a low level, and the RS voltage range of the ARD under test is 370VAC~410VAC, the output logic of the ARD under test is considered normal, and pin 39 of the MCU main control chip U43 outputs a stop signal. If pins 4, 29, 55, and 56 of the main control chip U43 all detect a low level, and the RS voltage range of the ARD under test is 0VAC~10VAC, the stop logic of the ARD under test is considered normal, and the test proceeds to step 5; otherwise, the test stops, and the red LED driven by the MCU main control chip lights up. After the operator removes the defective product, they press the reset button to return to step 1.

[0052] Step 5: Control contactor KM3 to close and control contactor KM4 to open. After a delay, once the ARD under test is stable, control contactor KM3 to open and control contactor KM4 to close, thus disconnecting the output circuit of manual power-off relay J2. Then, control relay J1 to open its output circuit, causing the contacts of contactors KM1 and KM2 to close.

[0053] If pins 4, 29, 55, and 56 of the main control chip U43 all detect a low level, and the RS voltage range of the ARD under test is 0VAC~10VAC, then the output logic is normal in the manual power-off enabled state. Disconnect all circuits in the switch module; the MCU main control chip will drive the green LED to light up; otherwise, the MCU main control chip will drive the red LED to light up. The testing process ends. After the operator removes the product, they press the reset button. The MCU main control chip detects a test reset signal at pin 30, ending the testing program and returning to step 1.

Claims

1. A factory performance testing system for an elevator power outage emergency rescue device, characterized in that: It includes a control and acquisition module, a load-bearing module, and a human-machine interaction module; The control and acquisition module includes an MCU main control chip, a voltage sampling module, a switching module, and a power supply module; The MCU main control chip outputs control commands based on the signals from the human-machine interaction module, controls the switch module to complete the state transition between conduction and cutoff, receives the sampling data from the voltage sampling module, performs threshold judgment and logic analysis, obtains the performance test results of the ARD under test, and returns them to the human-machine interaction module for display. The voltage sampling module is used to collect the output voltage of the three-phase power grid, the output voltage of the power supply module, and the output voltage of the ARD under test, and transmit the collected data to the ADC sampling port of the MCU main control chip; The switching module is located between the output terminal of the three-phase power grid and the power grid input terminal of the ARD under test, and between the output terminal of the power supply module and the battery terminal of the ARD under test. The power module is used to simulate the battery in the elevator power outage emergency rescue device, and to simulate the battery supplying power to the ARD under test when the three-phase power grid is abnormal. The load-bearing module is connected to the output port of the ARD under test to simulate the elevator car consuming the electrical energy output by the ARD under test. The human-computer interaction module is used to display the test results of the ARD performance under test returned by the control acquisition module.

2. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 1, characterized in that: The human-machine interaction module displays the wiring information between the control acquisition module, the load support module, and the ARD under test via a screen.

3. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 1, characterized in that: The human-computer interaction module indicates the detection results via LED lights.

4. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 3, characterized in that: A red LED light indicates a failure in the performance test, while a green LED light indicates a pass.

5. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 1, characterized in that: The voltage sampling module uses multiple resistor voltage divider circuits to collect the output voltage of the power supply module, the line voltage of the three-phase power grid L1L2, the phase voltage of L1N, and the RS, RT, and RN terminal voltages of the ARD under test, and transmits the collected voltage values ​​to the ADC sampling port of the MCU main control chip.

6. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 5, characterized in that: The R terminal of the ARD under test is connected to the coil of contactor KM1 through the first output circuit of relay J1. The control circuit of relay J1 receives the control signal output from pin 38 of MCU main control chip U43. The other end of the coil of contactor KM1 is connected to the T terminal of the ARD under test. The input contacts of contactor KM1 are connected to 3.3V voltage, and the output contacts are connected to pin 55 of MCU main control chip U43. The R terminal of the ARD under test is connected to the coil of contactor KM2 through the second output circuit of relay J1, and the N terminal is connected to the other end of the coil of contactor KM2; the input and output contacts of contactor KM2 are connected to the 3.3V voltage and pin 56 of MCU main control chip U43, respectively.

7. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 1, characterized in that: The switching module includes multiple contactors, relays, and a diode. The phase and neutral lines of the three-phase power grid are connected to the input terminal of the ARD under test via the contacts of contactor KM3. One end of the coil of contactor KM3 is connected to one phase line of the three-phase power grid, and the other end is connected to another phase line of the three-phase power grid via the output circuit of relay J3. The control circuit of relay J3 receives the control signal from pin 44 of the MCU main control chip. A contactor KM4 and a diode D2 are connected in parallel between the output terminal of the power module and the battery terminal of the ARD under test. The output terminal of the power module is connected to the battery terminal of the ARD under test via the contacts of contactor KM4. One end of the coil of contactor KM4 is connected to one phase line of the three-phase power grid, and the other end is connected to the neutral line of the three-phase power grid via the output circuit of relay J4. The control circuit of relay J4 receives the control signal from pin 41 of the MCU main control chip. The positive terminal of diode D2 is connected to the output terminal of the power module, and the negative terminal is connected to the battery terminal of the ARD under test.

8. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 1, characterized in that: The human-machine interface module is used to input the voltage threshold range of the ARD under test and the battery power supply voltage, and transmit them to the MCU main control chip to change the threshold judgment standard of the MCU main control chip and the output voltage value of the power supply module.

9. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 8, characterized in that: The power supply module includes multiple switching power supplies with different output voltages. The output terminal of each switching power supply is connected to the contact of contactor KM4 near the positive terminal of diode D2 through the contactor contacts. One end of the contactor coil is connected to one phase line of the three-phase power grid, and the other end is connected to the neutral line of the three-phase power grid through the output circuit of a relay. The control circuit of the relay receives the control signal output by the I / O of the MCU main control chip, and controls the on / off state of the relay through the output signal of the MCU main control chip, thereby connecting the ARD under test to different switching power supplies and realizing the adjustable output voltage of the power supply module.

10. The factory performance testing system for an elevator power outage emergency rescue device as described in claim 9, characterized in that: The output of each switching power supply can be directly connected to contactor KM4 via the switching power supply, and the output voltage of the power module can be controlled by manually opening and closing it.

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