A portable platform door system motor state detection device and method

Abstract

The present invention belongs to the technical field of subway platform door fault detection, and specifically relates to a portable platform door system motor status detection device and method. The device includes a power supply circuit, a battery, an MCU, a touch screen display circuit, a resistance detection circuit, and a position feedback waveform detection circuit. When in use, first remove the motor plug from the DCU and connect it to the detection device. After the connection is completed, according to the detection method, the resistance detection circuit detects that the interface resistance value has changed, and the device starts automatic detection and displays the resistance value of the motor drive part through the touch screen; after the drive part test is completed, the maintenance personnel manually change the position of the sliding door, so that the motor produces forward or reverse rotation, and the position feedback waveform detection circuit displays the waveform state read through the touch screen; the maintenance personnel can directly judge whether the motor is normal according to the touch screen display, which effectively improves the efficiency of platform door system fault handling.

Description

Technical Field

[0001] The invention belongs to the technical field of subway platform door fault detection, and in particular relates to a portable platform door system motor state detection device and method. Background Art

[0002] The rail transit industry belongs to the public transportation industry, and the platform door industry is a profession that affects the operation of the train. Once the platform door equipment fails, it will directly affect the normal boarding and alighting of passengers. Therefore, the on-site timeliness of fault handling is extremely high. The motor is the power source for the platform door system. When the sliding door is opened and closed, the DCU (door control unit) drives the motor to rotate forward and reverse to realize the opening and closing of the sliding door. When a motor failure occurs on site, it will directly cause the sliding door to be unable to open and close. In the actual maintenance process, maintenance personnel generally use measurement and replacement methods to determine whether the motor is normal.

[0003] When using the measurement method, the resistance value between each pin of the motor drive part and the position feedback part is measured by a multimeter to determine whether the motor is normal. There are the following problems when using this method:

[0004] 1. The on-site detection switch is connected using an aviation plug or connector. The pin spacing of the connecting components is small, which is very inconvenient when using a multimeter to measure, and the fault handling time is long.

[0005] 2. When measuring on site, you need to be familiar with the functions and normal resistance values ​​of each pin of the motor connector, which requires a high level of technical skills.

[0006] 3. The waveform of the position feedback part cannot be displayed, which may easily lead to misjudgment.

[0007] When using the replacement method, the DCU with lower requirements for the installation position is replaced first. If the equipment does not return to normal, the motor with higher requirements for the installation position is replaced. In this way, the specific faulty component is confirmed. When using this method, the time required to replace the component is long, which cannot meet the timeliness requirements of on-site fault handling.

[0008] In view of this, in order to solve the above technical problems, it is very necessary to provide a portable platform door system motor status detection device and method. Summary of the invention

[0009] In view of the defects and problems of the current detection methods for motor faults, such as inconvenient processing, long processing time, and easy misjudgment, the present invention provides a portable platform door system motor status detection device and method.

[0010] The solution adopted by the present invention to solve the technical problem is: a portable platform door system motor state detection device, including a power supply circuit, an MCU, and a display circuit, wherein the power supply circuit and the display circuit are both connected to the MCU; and a detection circuit, wherein the detection circuit is divided into a star detection circuit and a triangle detection circuit according to the motor wiring mode;

[0011] The star detection circuit includes a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR, VR and four relays S1, S2, S3, S4; the positive terminal of the differential amplifier voltage input is connected to the positive electrode of the constant current source through the matching resistor R1, the positive terminal of the differential amplifier voltage input is connected to the U detection terminal through the contact of the relay S1, and the positive terminal of the differential amplifier voltage input is connected to the V detection terminal through the contact of the relay S2; the U detection terminal is respectively connected to the equivalent resistors WR and VR through the equivalent resistor UR, the other end of the equivalent resistor WR is connected to the W detection terminal, and the equivalent The other end of the resistor VR is connected to the V detection terminal, the W detection terminal is connected to the negative terminal of the voltage input of the differential amplifier through the contact of the relay S3, the V detection terminal is connected to the negative terminal of the voltage input of the differential amplifier through the contact of the relay S4, and the negative terminal of the voltage input of the differential amplifier is connected to the negative electrode of the constant current source through the matching resistor R2; the U detection terminal, the V detection terminal and the W detection terminal are respectively used to connect the three-phase connector of the motor for detection, the output end of the differential amplifier is connected to the signal input end of the controller, and the contacts of the relay S1, the relay S2, the relay S3 and the relay S4 are respectively controlled to open and close by the controller;

[0012] The triangle detection circuit includes a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR, VR and five relays S1, S2, S3, S4 and S5; the positive terminal of the differential amplifier voltage input is connected to the positive electrode of the constant current source through the matching resistor R1, the positive terminal of the differential amplifier voltage input is connected to the U detection terminal through the contact of the relay S1, and the positive terminal of the differential amplifier voltage input is connected to the V detection terminal through the contact of the relay S2; the U detection terminal is connected to the W detection terminal through the equivalent resistor WR, the U detection terminal is connected to the V detection terminal through the contact of the relay S3 and the equivalent resistor UR, and the W detection terminal is connected to the V detection terminal through the contact of the relay S3 and the equivalent resistor UR. The detection terminal is connected to the negative terminal of the differential amplifier voltage input through the contact of relay S5, the W detection terminal is connected to the V detection terminal through the equivalent resistor VR, the V detection terminal is connected to the negative terminal of the differential amplifier voltage input through the contact of relay S4, and the negative terminal of the differential amplifier voltage input is connected to the negative electrode of the constant current source through the matching resistor R2. The U detection terminal, V detection terminal and W detection terminal are respectively used to connect the three-phase connector of the motor for detection, the output end of the differential amplifier is connected to the signal input end of the controller, and the contacts of the relay S1, relay S2, relay S3, relay S4 and relay S5 are respectively controlled to open and close by the controller.

[0013] The above-mentioned portable platform door system motor state detection device also includes a motor position detection circuit connected to the MCU to detect the position feedback waveform, the motor position detection circuit includes a primary inverter U1A, a secondary inverter U2A and an optocoupler, the optocoupler includes a light-emitting diode and a transistor, the positive electrode of the constant current source is connected to the negative electrode of the light-emitting diode through the primary inverter U1A, the secondary inverter U2A and the resistor R3, and the negative electrode of the constant current source is grounded; the base of the transistor is connected in series with the resistor R4 and then connected to the MCU, the collector of the transistor is connected to the MCU, and the emitter of the transistor is grounded.

[0014] The above-mentioned portable platform door system motor status detection device also includes an SD card, and the SD card is connected to the MCU for updating the program.

[0015] The above-mentioned portable platform door system motor state detection device also includes a touch display screen, and the touch display screen is connected to the MCU.

[0016] The above-mentioned portable platform door system motor status detection device also includes an alarm connected to the MCU for warning, and the alarm is a kind of sound and light alarm or buzzer.

[0017] The above-mentioned portable platform door system motor state detection device also includes a battery and a power management circuit. The battery and the power management circuit are both connected to the MCU. The battery is a polymer lithium battery.

[0018] The above-mentioned portable platform door system motor status detection device also includes a status indicator light, and the status indicator light is connected to the MCU.

[0019] The above-mentioned portable platform door system motor status detection device also includes a USB interface, and the USB interface is connected to the MCU for communicating with a PC.

[0020] The present invention also provides a motor state detection method using the above-mentioned portable platform door system motor state detection device, the method detects the star-connected motor and the delta-connected motor respectively, wherein the star-connected motor detection method comprises the following steps:

[0021] (1) The controller controls the contacts of relays S1, S2, and S3 to close, and the other contacts to open, and the device enters the test state; the motor coil is connected, and the device starts to detect the status of the UW and VW coils at the same time. When any one of the two sets of coils forms a path, the MCU can detect this state. After detecting this state, the contacts of relays S1, S2, and S3 are controlled to open, and the three sets of coils are tested one by one;

[0022] (2) The controller controls the contacts of relays S1 and S4 to close and the other contacts to disconnect. The voltage forms a path through matching resistors R1, S1, UR, VR, S4, and matching resistor R2. The voltage across UV is detected at both ends of the differential amplifier and the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the relay is controlled to disconnect S1 and S4. If the resistance exceeds the allowable range, a motor fault is displayed and maintenance is notified.

[0023] (3) The controller controls the contacts of relays S1 and S3 to close and the other contacts to open. The voltage forms a path through matching resistors R1, S1, UR, WR, S3, and matching resistor R2. The voltage across UW is detected at both ends of the differential amplifier and the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S1 and S3 are controlled to open. If the resistance exceeds the allowable range, a motor fault is displayed and maintenance is notified.

[0024] (4) The controller controls the contacts of relays S2 and S3 to close and the other contacts to open. At this time, the voltage forms a path through matching resistors R1, S2, VR, WR, S3, and matching resistor R2. The voltage across VW is detected at both ends of the differential amplifier and the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S2 and S3 are controlled to open. If the resistance exceeds the allowable range, the motor fault is displayed and maintenance is notified.

[0025] The delta connection motor detection method includes the following steps:

[0026] (1) The controller controls the contacts of relays S1, S2, and S5 to close, and the other contacts to open. The detection device enters the test state, the motor coil is connected, and the UW and VW coils are detected at the same time. Any one of the paths forms a path to transmit the signal to the MCU, and the MCU can detect this state. After detecting this state, the contacts of control relays S1, S2, and S5 are opened, and the three groups of coils are tested one by one;

[0027] (2) The controller controls the contacts of relays S1, S3 and S4 to close and the other contacts to open. The voltage forms a path through matching resistors R1, S1, S3, UR, S4 and matching resistor R2. After the voltage across UV is detected at both ends of the differential amplifier, the voltage state is sent to the MCU, which converts the voltage state into a resistance value for display. If the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S1, S3 and S4 are controlled to open. If the resistance is detected to exceed the allowable range, a motor fault is displayed.

[0028] (3) The controller controls the contacts of relays S1 and S5 to close and the other contacts to open. The voltage forms a path through matching resistors R1, S1, WR, S5, and matching resistor R2. The voltage across UW is detected at both ends of the differential amplifier and the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S1 and S5 are controlled to open. If the resistance exceeds the allowable range, a motor fault is displayed.

[0029] (4) The controller controls the contacts of relays S2 and S5 to close and the other contacts to open. At this time, the voltage forms a path through matching resistors R1, S2, VR, S5, and matching resistor R2. After the voltage across VW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU, which converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S2 and S5 are controlled to open. If the resistance is detected to exceed the allowable range, a motor fault is displayed.

[0030] Beneficial effects of the present invention:

[0031] 1. This detection device is composed of a control circuit composed of multiple relays to complete the detection of the internal resistance of multiple coils under different wiring modes of the motor.

[0032] 2. There are multiple groups of different parameters set inside this detection device. You can select the corresponding parameters for different loads to meet the maintenance and detection needs of different motors.

[0033] 3. This detection device can determine the number of revolutions and the forward and reverse direction of the motor based on the position feedback waveform detection circuit, which is convenient for maintenance personnel to observe.

[0034] 4. This detection device has the function of maintaining the resistance state. After completing the resistance test of the motor drive part, the device will maintain the resistance value. When the external resistance value changes again, it will not affect the display of the resistance state of this part.

[0035] 5. This detection device is equipped with a buzzer, which is connected to the MCU. When the threshold or waveform of the detection received by the MCU is inconsistent with the setting, it can automatically alarm and respond with a sound prompt.

[0036] 6. This detection device is provided with a status indicator light. When the device is in the resistance test state of the motor drive part, the indicator light is red, and it is forbidden to change the position of the sliding door at this time; after the resistance test of the motor drive part is completed, the resistance display result is maintained, and the internal relay of the device is disconnected to prevent the voltage generated by changing the position of the sliding door from affecting the measurement result. The status indicator light is green, and the buzzer emits a prompt sound at the same time, and the device enters the position feedback waveform detection state.

[0037] 7. This detection device has an SD card upgrade function. When the device updates the program, it can be upgraded through the SD card. At the same time, if the upgrade fails, it will not affect the SD card upgrade function and the device. The USB interface of this detection device can communicate with the PC, realize the OTG firmware upgrade of the instrument program, and realize the export function of stored data.

[0038] 8. This detection device has automatic detection and manual detection functions. When it detects that the tested component is connected, it will automatically start the detection. When the tested component is disconnected, it can automatically stop the measurement. When the automatic detection is invalid, it can be controlled by manual control.

[0039] 9. This detection device uses a polymer lithium-ion battery as a power source, and has a lithium battery charging management circuit and a power management circuit inside. Under the premise of ensuring the use time of the device, the size of the device can be greatly reduced, making the device easier to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structural block diagram of the present invention.

[0041] Figure 2 This is the schematic diagram of motor coil resistance detection.

[0042] Figure 3 This is the schematic diagram of star-connected motor detection.

[0043] Figure 4 This is the schematic diagram of the delta-connected motor detection.

[0044] Figure 5 This is the schematic diagram of the position feedback waveform detection principle.

[0045] Figure 6 This is the switching schematic diagram for star-connected motor detection and delta-connected motor detection.

[0046] Figure 7 This is the switching control diagram of the detection circuit of the present invention.

[0047] The numbers in the figure are: 1 is the first stationary contact of the switching switch K1, 2 is the second stationary contact of the switching switch K1, 3 is the first stationary contact of the switching switch K2, 4 is the second stationary contact of the switching switch K2, 5 is the first stationary contact of the switching switch K4, and 6 is the second stationary contact of the switching switch K4. DETAILED DESCRIPTION

[0048] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0049] Embodiment 1: This embodiment is designed for the motor state in the platform door system failure. Figure 1The detection device shown includes a power supply circuit, a battery, an MCU, a touch display circuit, a motor detection circuit and an alarm. The alarm can be an audible and visual alarm or a buzzer according to the needs. The battery can be a polymer lithium battery. The power supply circuit, the touch screen display circuit, the resistance detection circuit and the alarm are all connected to the MCU. The MCU feeds back the detection situation to the display screen to facilitate the judgment of whether a fault occurs. The device can set multiple groups of different parameters internally, and select corresponding parameters for different loads to meet the maintenance and detection needs of different motors.

[0050] The motor detection circuit is divided into star detection circuit and triangle detection circuit according to the motor wiring method.

[0051] Before use, first determine whether the motor connection method is star connection or triangle connection and select the corresponding detection circuit. The QR code information can be printed on the motor casing. By scanning the QR code, the specific wiring method of the motor can be displayed on the display screen, which is convenient for selecting the detection circuit.

[0052] If the connection is star-shaped, a star-shaped detection circuit is selected, and its detection structure is as follows: Figure 2 and Figure 3 As shown, the star detection circuit includes a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR, VR and four relays S1, S2, S3, S4; the positive terminal of the differential amplifier voltage input is connected to the positive electrode of the constant current source through the matching resistor R1, the positive terminal of the differential amplifier voltage input is connected to the U detection terminal through the contact of the relay S1, and the positive terminal of the differential amplifier voltage input is connected to the V detection terminal through the contact of the relay S2; the U detection terminal is respectively connected to the equivalent resistors WR and VR through the equivalent resistor UR, the other end of the equivalent resistor WR is connected to the W detection terminal, and the equivalent The other end of the resistor VR is connected to the V detection terminal, the W detection terminal is connected to the negative terminal of the differential amplifier voltage input through the contact of the relay S3, the V detection terminal is connected to the negative terminal of the differential amplifier voltage input through the contact of the relay S4, and the negative terminal of the differential amplifier voltage input is connected to the negative electrode of the constant current source through the matching resistor R2; the U detection terminal, the V detection terminal and the W detection terminal are respectively used to connect the three-phase connector of the motor for detection, the output end of the differential amplifier is connected to the signal input end of the controller, and the contacts of the relay S1, the relay S2, the relay S3 and the relay S4 are respectively controlled to open and close by the controller.

[0053] When in use, first remove the motor plug from the DCU and connect it to this detection device. For the convenience of introduction, we define the equivalent resistance of the three groups of motor coils as UR, WR and VR respectively. Since the motor cannot measure the resistance of a single coil when it is star-connected without a neutral point connection, the device measures the sum of the resistance of two groups of coils between the three groups of coils during measurement, and displays three groups of states: UV, UW, and VW.

[0054] When power is turned on or the manual state is switched to the motor coil state detection, the controller controls the contacts of relays S1, S2, and S3 to close, and the other contacts to disconnect, and the device enters the test state. When the motor coil is connected, the device starts to detect the UW and VW coil states at the same time. When any one of the two sets of coils forms a path, the MCU can detect this state. After detecting this state, the contacts of control relays S1, S2, and S5 are disconnected, and the three sets of coils are tested one by one.

[0055] When UV is detected, the controller controls the contacts of relays S1 and S4 to close and the other contacts to disconnect. At this time, the voltage forms a path through matching resistors 1, S1, UR, VR, S4, and matching resistor 2. After the voltage at both ends of UV is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the relay control switches S1 and S4 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0056] After UV detection is completed, UW detection starts automatically. During detection, the controller controls the S1 and S3 contacts of the relay to close and the other contacts to disconnect. At this time, the voltage forms a path through matching resistors 1, S1, UR, WR, S3, and matching resistor 2. After the voltage at both ends of UW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the relay control switches S1 and S3 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0057] After the UW detection is completed, VW detection starts automatically. During the detection, the controller controls the contacts of relays S2 and S3 to close and the other contacts to disconnect. At this time, the voltage forms a path through matching resistors 1, S2, VR, WR, S3, and matching resistor 2. After the voltage at both ends of VW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the relay control switches S2 and S3 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0058] Through the above process, the detection of the state of the star-connected motor coil can be completed. After the detection is completed, the S1-S4 switches are all in the disconnected state, the device control indicator light is displayed green, and the buzzer emits a prompt sound, prompting the maintenance personnel to change the sliding door state for position feedback waveform detection.

[0059] If the connection is in triangle, use triangle detection circuit, such as Figure 2 and Figure 4 shown.

[0060] The triangle detection circuit includes a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR, VR and five relays S1, S2, S3, S4 and S5; the positive terminal of the differential amplifier voltage input is connected to the positive electrode of the constant current source through the matching resistor R1, the positive terminal of the differential amplifier voltage input is connected to the U detection terminal through the contact of the relay S1, and the positive terminal of the differential amplifier voltage input is connected to the V detection terminal through the contact of the relay S2; the U detection terminal is connected to the W detection terminal through the equivalent resistor WR, the U detection terminal is connected to the V detection terminal through the contact of the relay S3 and the equivalent resistor UR, and the W detection terminal is connected to the V detection terminal. The terminal is connected to the negative terminal of the differential amplifier voltage input through the contact of relay S5, the W detection terminal is connected to the V detection terminal through the equivalent resistor VR, the V detection terminal is connected to the negative terminal of the differential amplifier voltage input through the contact of relay S4, and the negative terminal of the differential amplifier voltage input is connected to the negative electrode of the constant current source through the matching resistor R2. The U detection terminal, V detection terminal and W detection terminal are respectively used to connect the three-phase connector of the motor for detection, the output end of the differential amplifier is connected to the signal input end of the controller, and the contacts of the relays S1, S2, S3, S4 and S5 are respectively controlled to open and close by the controller.

[0061] For the convenience of introduction, we define the equivalent resistance of the three groups of motor coils as UR, WR and VR respectively, and display three groups of states: UV, UW and VW.

[0062] When power is turned on or the manual state is switched to the motor coil state detection, the controller controls the contacts of relays S1, S2, and S5 to close, and the other contacts to disconnect, and the device enters the test state. When the motor coil is connected, the device starts to detect the UW and VW coil states at the same time. When any one of the two sets of coils forms a path, the MCU can detect this state. After detecting this state, the contacts of control relays S1, S2, and S5 are disconnected, and the three sets of coils are tested one by one.

[0063] When UV is detected, the controller controls the contacts of relays S1, S3 and S4 to close, and the other contacts to disconnect. At this time, the voltage forms a path through matching resistors 1, S1, S3, UR, S4, and matching resistor 2. After the voltage across UV is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S1, S3 and S4 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0064] After UV detection is completed, UW detection starts automatically. During detection, the controller controls the contacts of relays S1 and S5 to close and the other contacts to disconnect. At this time, the voltage forms a path through matching resistors 1, S1, WR, S5, and matching resistor 2. After the voltage at both ends of UW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S1 and S5 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0065] After the UW detection is completed, VW detection starts automatically. During the detection, the controller controls the contacts of relays S2 and S5 to close and the other contacts to disconnect. At this time, the voltage forms a path through matching resistors 1, S2, VR, S5, and matching resistor 2. After the voltage at both ends of VW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S2 and S5 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0066] Through the above process, the detection of the state of the star-connected motor coil can be completed. After the detection is completed, the S1-S5 switches are all in the disconnected state, the device control indicator light is displayed green, and the buzzer emits a prompt sound, prompting the maintenance personnel to change the sliding door state for position feedback waveform detection.

[0067] Example 2: In order to further improve the performance of the detection device, a motor position waveform detection circuit and a status indicator light are also provided. The status indicator light is connected to the MCU. When the device is in the resistance test state of the motor drive part, the indicator light is displayed in red, and it is forbidden to change the position of the sliding door at this time; after the resistance test of the motor drive part is completed, the resistance display result is maintained, and the internal relay of the device is disconnected to prevent the voltage generated by changing the position of the sliding door from affecting the measurement result. The status indicator light is displayed in green, and the buzzer emits a prompt sound, and the device enters the position feedback waveform detection state.

[0068] The motor position waveform detection circuit can be connected to the MCU to detect Figure 5 As shown, it includes a primary inverter U1A, a secondary inverter U2A, an optocoupler and a current limiting resistor, the optocoupler includes a light emitting diode and a transistor, the positive electrode of the constant current source is connected to the power supply end through the current limiting resistors R1 and R2; the positive electrode of the constant current source is connected to the negative electrode of the light emitting diode through the primary inverter U1A, the secondary inverter U2A and the resistor R3, and the negative electrode of the constant current source is grounded; the base of the transistor is connected in series with the resistor R4 and then connected to the MCU, the collector of the transistor is connected to the MCU, and the emitter of the transistor is grounded.

[0069] When performing position feedback waveform detection, by manually changing the position of the sliding door, the motor position detection circuit will output a switch level signal, which is amplified by a two-stage inverter and then drives the optocoupler. The optocoupler feeds back the motor position status to the MCU. The MCU determines the motor speed and direction after analyzing the status signals of all channels. When the data of one channel cannot be uploaded, it can be determined that there is a fault in the motor position feedback circuit, and an alarm is sounded through the buzzer, and the display shows a motor fault, notifying the maintenance personnel to replace the motor.

[0070] The above design for judging the motor status during the platform door system failure process can solve the problem of difficulty in judging faults using general tools during on-site maintenance, and can greatly improve the efficiency of fault handling. This detection device can be a special device, mainly for detecting motors using the same control method, and can also use multiple groups of interfaces to detect motors with different control methods, with strong versatility.

[0071] Example 3: Based on Example 1 and Example 2, this example also has an SD card upgrade function. The SD card is connected to the MCU for updating the program. When the device updates the program, it can be upgraded through the SD card. At the same time, it is guaranteed that if the upgrade fails, it will not affect the SD card upgrade function and the device. The USB interface of this detection device can communicate with a PC, realize OTG firmware upgrade of the instrument program, and realize the export function of stored data.

[0072] At the same time, the detection device has automatic detection and manual detection functions. When it detects that the tested component is connected, it automatically starts to detect. When the tested component is disconnected, the measurement can be automatically stopped. When automatic detection is invalid, control can be achieved through manual control.

[0073] Embodiment 4: Embodiment 1 of the present invention can select different detection circuits for detection according to different wiring methods, and can solve the existing problems of inconvenient measurement, long processing time and easy misjudgment of multimeter. However, a subway line is provided with multiple platform doors, and the motor wiring methods of multiple platform doors of a station line are sometimes not completely consistent. In many cases, the motor needs to be replaced due to motor failure, resulting in different motor purchase batches and different motor wiring methods. This requires that when testing the motor, it is necessary to choose between the two tests according to the different motor wiring methods. However, since the number of devices that an individual can carry is limited, carrying two devices will cause problems such as troublesome replacement, space occupation and inconvenience in carrying.

[0074] In order to solve the above problems, this embodiment is improved on the basis of embodiment 1 to realize the arbitrary switching of the star detection circuit and the triangle detection circuit, which can effectively solve the problems of inconvenience in carrying and troublesome replacement. Figure 2 , Figure 6 and Figure 7 .

[0075] As shown in the figure, the detection device includes a power supply circuit, an MCU, a display circuit and a detection circuit. The power supply circuit and the display circuit are both connected to the MCU.

[0076] The detection circuit includes a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR, VR, relays S1, S2, S3, S4, S5 and S30, and switching switches K1, K2, K3 and K4; the positive terminal of the differential amplifier voltage input is connected to the positive electrode of the constant current source through the matching resistor R1, the positive terminal of the differential amplifier voltage input is connected to the U detection terminal through the contact of the relay S1, and the positive terminal of the differential amplifier voltage input is connected to the V detection terminal through the contact of the relay S2; the U detection terminal is connected to the equivalent resistor UR through the first static contact 1 of the switching switch K1, and the other end of the equivalent resistor UR is connected to the equivalent resistor WR through the contact of the relay S3; the other end of the equivalent resistor WR is connected to the W detection terminal and is grounded through the contact of the relay S30 and the matching resistor R2; the first static contact 3 and the second static contact 4 of the switching switch K2 are respectively connected to the two ends of the equivalent resistor UR.

[0077] The V detection terminal is connected to the equivalent resistor VR through the switching switch K3, and the other end of the equivalent resistor VR is connected to the negative electrode of the constant current source through the first static contact 5 of the switching switch K4 and the matching resistor R2, and the second static contact 6 of the switching switch K4 and the contact of the relay S4 are connected to the negative terminal of the differential amplifier voltage input; the V detection terminal is connected to the negative terminal of the differential amplifier voltage input through the contact of the relay S4.

[0078] The negative terminal of the voltage input of the differential amplifier is connected to the negative terminal of the constant current source through the contact of the relay S5 and the matching resistor R2; the U detection terminal, the V detection terminal and the W detection terminal are respectively used to connect the three-phase connector of the motor for detection, the output end of the differential amplifier is connected to the signal input end of the controller, and the contacts of the relay S1, the relay S2, the relay S3, the relay S4, the relay S5 and the relay S30 are respectively controlled to open and close by the controller; the switching switches K1-K4 are controlled by the controller to switch with one button.

[0079] Scan the code to verify the motor wiring method. If it is a star wiring method, switch to Figure 6 In the detection circuit a, at this time, the switch K3 is disconnected, the moving contact of the single-pole double-throw switch K1 is connected to the first static contact, and the moving contacts of the single-pole double-throw switches K2 and K4 are both connected to the second static contact.

[0080] When measuring, when the power is turned on or the manual state is switched to the motor coil state detection, the controller controls the contacts of relays S1, S2, and S3 to close, and other contacts to disconnect, and the device enters the test state. When the motor coil is connected, the device starts to detect the UW and VW coil states at the same time. When any one of the two sets of coils forms a path, the MCU can detect this state. After detecting this state, the contacts of control relays S1, S2, and S3 are disconnected, and the three sets of coils are tested one by one.

[0081] When UV is detected, the controller controls the contacts of relays S1 and S4 to close and the other contacts to disconnect. At this time, the voltage forms a path through matching resistors R1, S1, K1, UR, K2, VR, K4, S4, and matching resistor R2. After the voltage at both ends of UV is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S1 and S4 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0082] After UV detection is completed, UW detection starts automatically. During detection, the controller controls the contacts of relays S1, S3, and S30 to close, and other contacts to disconnect. At this time, the voltage forms a path through matching resistors R1, S1, K1, UR, S3, WR, S30 and matching resistor R2. After the voltage at both ends of UW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S1, S3 and S30 are controlled to disconnect. When the resistance is detected to exceed the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0083] After the UW detection is completed, VW detection starts automatically. During the detection, the controller controls the contacts of relays S2, S3 and S30 to close, and the other contacts to disconnect. At this time, the voltage passes through the matching resistors R1, S2, K4, VR, K2, WR, S3, WR, S30, and the matching resistor R2 to form a path. After the voltage at both ends of VW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When it is detected that the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S2, S3 and S30 are controlled to disconnect. When it is detected that the resistance exceeds the allowable range, an alarm is sounded through the buzzer, and the display shows that the motor is faulty, notifying the maintenance personnel to replace the motor.

[0084] Through the above process, the detection of the state of the star-connected motor coil can be completed. After the detection is completed, the contacts of relays S1, S2, S3, S4 and S30 are all in the disconnected state, the device control indicator light is displayed green, and the buzzer emits a prompt sound, prompting the maintenance personnel to change the sliding door state for position feedback waveform detection.

[0085] After scanning the code for verification, if it is a triangle wiring method, the controller controls the switching switch to switch from the star wiring detection circuit to the triangle wiring method with one click. At this time, the switch K3 is closed, the moving contact of the single-pole double-throw switch K1 is connected to the second static contact, and the moving contacts of the single-pole double-throw switches K2 and K4 are both connected to the first static contact.

[0086] When the power is turned on or the manual state is switched to the motor coil state detection, the controller controls the contacts of relays S1, S2, S5 and S30 to close, and other contacts to disconnect, and the device enters the test state. When the motor coil is connected, the device starts to detect the UW and VW coil states at the same time. When any one of the two sets of coils forms a path, the MCU can detect this state. After detecting this state, the contacts of control relays S1, S2, S5 and S30 are disconnected, and the three sets of coils are tested one by one.

[0087] When UV is detected, the controller controls the contacts of relays S1, S3 and S4 to close and the other contacts to disconnect. At this time, the voltage forms a path through matching resistors R1, S1, K1, S3, UR, K2, K3, S4, S5 and matching resistor R2. After the voltage at both ends of UV is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S1, S3 and S4 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0088] After UV detection is completed, UW detection starts automatically. During detection, the controller controls the contacts of relays S1, S5, and S30 to close, and other contacts to disconnect. At this time, the voltage passes through matching resistors R1, S1, K1, WR, S30, S5, and matching resistor R2 to form a path. After the voltage at both ends of UW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S1, S5, and S30 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0089] After the UW detection is completed, VW detection starts automatically. During the detection, the controller controls the contacts of relays S2 and S5 to close and the other contacts to disconnect. At this time, the voltage forms a path through the matching resistors R1, S2, K3, VR, K4, S5 and the matching resistor R2. After the voltage at both ends of VW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. When the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S2 and S5 are controlled to disconnect. When the resistance is detected to be beyond the allowable range, an alarm is sounded through the buzzer, and the display shows a motor failure, notifying the maintenance personnel to replace the motor.

[0090] Through the above process, the detection of the state of the star-connected motor coil can be completed. After the detection is completed, the contacts of S1, S2, S3, S4, S5 and S30 are all in the disconnected state, the device control indicator light is displayed green, and the buzzer emits a prompt sound, prompting the maintenance personnel to change the sliding door state for position feedback waveform detection.

[0091] The controller controls the electric shock position of the switching switch, thereby realizing one-key switching of the star-connected motor detection circuit and the triangle-connected motor detection circuit. The operator does not need to carry two detection devices when using them. It only needs to control the electric shock position of the switching switch to realize real-time switching of the two detection circuits, which is more convenient.

[0092] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable platform door system motor status detection device, comprising a power supply circuit, an MCU, and a display circuit, wherein the power supply circuit and the display circuit are both connected to the MCU, and characterized in that: It also includes a detection circuit, which is divided into a star detection circuit and a triangle detection circuit according to the motor wiring mode; The star detection circuit includes a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR, VR and four relays S1, S2, S3, S4; the positive terminal of the differential amplifier voltage input is connected to the positive electrode of the constant current source through the matching resistor R1, the positive terminal of the differential amplifier voltage input is connected to the U detection terminal through the contact of the relay S1, and the positive terminal of the differential amplifier voltage input is connected to the V detection terminal through the contact of the relay S2; the U detection terminal is respectively connected to the equivalent resistors WR and VR through the equivalent resistor UR, the other end of the equivalent resistor WR is connected to the W detection terminal, and the equivalent The other end of the resistor VR is connected to the V detection terminal, the W detection terminal is connected to the negative terminal of the voltage input of the differential amplifier through the contact of the relay S3, the V detection terminal is connected to the negative terminal of the voltage input of the differential amplifier through the contact of the relay S4, and the negative terminal of the voltage input of the differential amplifier is connected to the negative electrode of the constant current source through the matching resistor R2; the U detection terminal, the V detection terminal and the W detection terminal are respectively used to connect the three-phase connector of the motor for detection, the output end of the differential amplifier is connected to the signal input end of the controller, and the contacts of the relay S1, the relay S2, the relay S3 and the relay S4 are respectively controlled to open and close by the controller; The triangle detection circuit includes a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR, VR and five relays S1, S2, S3, S4 and S5; the positive terminal of the voltage input of the differential amplifier is connected to the positive electrode of the constant current source through the matching resistor R1, the positive terminal of the voltage input of the differential amplifier is connected to the U detection terminal through the contact of the relay S1, and the positive terminal of the voltage input of the differential amplifier is connected to the V detection terminal through the contact of the relay S2; the U detection terminal is connected to the W detection terminal through the equivalent resistor WR, the U detection terminal is connected to the V detection terminal through the contact of the relay S3 and the equivalent resistor UR, and the W detection terminal is connected to the V detection terminal through the contact of the relay S3 and the equivalent resistor UR. The detection terminal is connected to the negative terminal of the voltage input of the differential amplifier through the contact of the relay S5, the W detection terminal is connected to the V detection terminal through the equivalent resistor VR, the V detection terminal is connected to the negative terminal of the voltage input of the differential amplifier through the contact of the relay S4, and the negative terminal of the voltage input of the differential amplifier is connected to the negative electrode of the constant current source through the matching resistor R2. The U detection terminal, the V detection terminal and the W detection terminal are respectively used to connect the three-phase connector of the motor for detection, the output end of the differential amplifier is connected to the signal input end of the controller, and the contacts of the relays S1, S2, S3, S4 and S5 are respectively controlled to open and close by the controller; The detection circuit also includes a relay S30 and switching switches K1, K2, K3 and K4; the U detection terminal is connected to the equivalent resistor UR through the first static contact 1 of the switching switch K1, and the other end of the equivalent resistor UR is connected to the equivalent resistor WR through the contact of the relay S3; the other end of the equivalent resistor WR is connected to the W detection terminal and is grounded through the contact of the relay S30 and the matching resistor R2; the first static contact 3 and the second static contact 4 of the switching switch K2 are respectively connected to both ends of the equivalent resistor UR; The V detection terminal is connected to the equivalent resistor VR through the switching switch K3, and the other end of the equivalent resistor VR is connected to the negative electrode of the constant current source through the first static contact 5 of the switching switch K4 and the matching resistor R2, and the second static contact 6 of the switching switch K4 and the contact of the relay S4 are connected to the negative terminal of the voltage input of the differential amplifier; the negative terminal of the voltage input of the differential amplifier is connected to the negative electrode of the constant current source through the contact of the relay S5 and the matching resistor R2; the switching switches K1-K4 are controlled by the controller to switch with one key; It also includes a motor position detection circuit connected to the MCU for detecting a position feedback waveform, the motor position detection circuit includes a primary inverter U1A, a secondary inverter U2A and an optocoupler, the optocoupler includes a light emitting diode and a transistor, the positive electrode of the constant current source is connected to the negative electrode of the light emitting diode through the primary inverter U1A, the secondary inverter U2A and the resistor R3, and the negative electrode of the constant current source is grounded; the base of the transistor is connected in series with the resistor R4 and then connected to the MCU, the collector of the transistor is connected to the MCU, and the emitter of the transistor is grounded.

2. The portable platform door system motor status detection device according to claim 1, characterized in that: QR code information is printed on the motor casing. By scanning the QR code, the specific wiring method of the motor can be displayed on the display screen.

3. The portable platform door system motor status detection device according to claim 1, characterized in that: It also includes an SD card, which is connected to the MCU for updating the program. When the device updates the program, it can be upgraded through the SD card. At the same time, it is guaranteed that if the upgrade fails, it will not affect the SD card upgrade function and the device.

4. The portable platform door system motor status detection device according to claim 1, characterized in that: It also includes a touch display screen, which is connected to the MCU.

5. The portable platform door system motor status detection device according to claim 1, characterized in that: It also includes an alarm connected to the MCU for warning, and the alarm is a sound and light alarm or a buzzer.

6. The portable platform door system motor status detection device according to claim 1, characterized in that: It also includes a battery and a power management circuit, both of which are connected to the MCU, and the battery is a polymer lithium battery.

7. The portable platform door system motor status detection device according to claim 1, characterized in that: It also includes a status indicator light, which is connected to the MCU.

8. The portable platform door system motor status detection device according to claim 1, characterized in that: It also includes a USB interface, which is connected to the MCU for communicating with a PC to achieve OTG firmware upgrades of the instrument program and export functions of stored data.

9. A motor state detection method of the portable platform door system motor state detection device as claimed in claim 1, characterized in that: The star-connected motor and the delta-connected motor are tested respectively, wherein the star-connected motor testing method comprises the following steps: (1) The controller controls the contacts of relays S1, S2, and S3 to close, and the other contacts to open, and the device enters the test state; the motor coil is connected, and the device starts to detect the status of the UW and VW coils at the same time. When any one of the two sets of coils forms a path, the MCU can detect this state. After detecting this state, the contacts of relays S1, S2, and S3 are controlled to open, and the three sets of coils are tested one by one; (2) The controller controls the contacts of relays S1 and S4 to close and the other contacts to open. The voltage forms a path through matching resistors R1, S1, UR, VR, S4, and matching resistor R2. The voltage across UV is detected at both ends of the differential amplifier and the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S1 and S4 are controlled to open. If the resistance exceeds the allowable range, a motor fault is displayed and maintenance is notified. (3) The controller controls the contacts of relays S1 and S3 to close and the other contacts to open. The voltage forms a path through matching resistors R1, S1, UR, WR, S3, and matching resistor R2. The voltage across UW is detected at both ends of the differential amplifier and the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S1 and S3 are controlled to open. If the resistance exceeds the allowable range, a motor fault is displayed and maintenance is notified. (4) The controller controls the contacts of relays S2 and S3 to close and the other contacts to open. At this time, the voltage forms a path through matching resistors R1, S2, VR, WR, S3, and matching resistor R2. The voltage across VW is detected at both ends of the differential amplifier and the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S2 and S3 are controlled to open. If the resistance exceeds the allowable range, the motor fault is displayed and maintenance is notified. The delta connection motor detection method includes the following steps: (1) The controller controls the contacts of relays S1, S2, and S5 to close, and the other contacts to open. The detection device enters the test state, the motor coil is connected, and the UW and VW coils are detected at the same time. Any one of the paths forms a path to transmit the signal to the MCU, and the MCU can detect this state. After detecting this state, the contacts of control relays S1, S2, and S5 are opened, and the three groups of coils are tested one by one; (2) The controller controls the contacts of relays S1, S3 and S4 to close and the other contacts to open. The voltage forms a path through matching resistors R1, S1, S3, UR, S4 and matching resistor R2. After the voltage across UV is detected at both ends of the differential amplifier, the voltage state is sent to the MCU, which converts the voltage state into a resistance value for display. If the resistance is detected to be within the allowable range, the resistance value is displayed and the contacts of relays S1, S3 and S4 are controlled to open. If the resistance is detected to exceed the allowable range, a motor fault is displayed. (3) The controller controls the contacts of relays S1 and S5 to close and the other contacts to open. The voltage forms a path through matching resistors R1, S1, WR, S5, and matching resistor R2. The voltage across UW is detected at both ends of the differential amplifier and the voltage state is sent to the MCU. The MCU converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S1 and S5 are controlled to open. If the resistance exceeds the allowable range, a motor fault is displayed. (4) The controller controls the contacts of relays S2 and S5 to close and the other contacts to open. At this time, the voltage forms a path through the matching resistors R1, S2, VR, S5, and matching resistor R2. After the voltage across VW is detected at both ends of the differential amplifier, the voltage state is sent to the MCU, which converts the voltage state into a resistance value for display. If the resistance is within the allowable range, the resistance value is displayed and the contacts of relays S2 and S5 are controlled to open. If the resistance is detected to exceed the allowable range, a motor fault is displayed.

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