CN111522279A - PDU controller based on thick film circuit and control method thereof - Google Patents
PDU controller based on thick film circuit and control method thereof Download PDFInfo
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- CN111522279A CN111522279A CN202010454506.5A CN202010454506A CN111522279A CN 111522279 A CN111522279 A CN 111522279A CN 202010454506 A CN202010454506 A CN 202010454506A CN 111522279 A CN111522279 A CN 111522279A
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- 238000000034 method Methods 0.000 title claims description 14
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 238000004806 packaging method and process Methods 0.000 claims abstract description 18
- 238000004891 communication Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000013021 overheating Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000012611 container material Substances 0.000 description 1
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- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The invention provides a PDU controller based on thick film circuit, comprising: the MCU control unit receives a control signal sent by the system controller; the photoelectric detection module is used for detecting whether the packaging unit is in place or not and feeding back an in-place signal to the MCU control unit; the temperature detection module is connected with the motor, detects the temperature of the motor and feeds a temperature signal back to the MCU control unit; the current detection module detects the current in the motor and feeds a current signal back to the MCU control unit; the power supply module supplies power to the MCU control unit and the photoelectric detection module; and the motor is connected with the MCU control unit. The invention adds a judgment logic signal, adopts various control logics and is used for reducing the failure probability of the power driving device in the actual work, namely when a photoelectric detection module of a product fails, the controller can also normally operate by receiving the control signal of the system controller.
Description
Technical Field
The invention belongs to the technical field of automatic container material loading and unloading of civil aircrafts, relates to a power driving device controller of an aircraft container type cargo loading system, and particularly relates to a PDU (Power data Unit) controller based on a thick film circuit and a control method thereof.
Background
The power driving device matched with the aircraft cargo loading system is integrated with a driving motor and a controller, and when the container unit of the civil aircraft is loaded and unloaded, the motor drives the container unit to transmit power, so that the controller of the power driving device needs to have a function of controlling the start and stop of the motor by a set of control logic. And because the controller is installed in the casing of power drive arrangement, installation space is limited, so the controller need reduce its size as far as possible under the prerequisite that does not influence functional performance. However, the existing controller has the problems of simple function, large volume, short service life, low reliability and the like.
Disclosure of Invention
The purpose of the invention is as follows: the thick film circuit-based PDU controller and the control method thereof solve the problems of single function, short service life, low task reliability and the like of the traditional controller, improve the task reliability of the controller and reduce the failure rate of products.
The technical scheme of the invention is as follows: provided is a thick film circuit-based PDU controller including: the MCU control unit receives a control signal sent by the system controller; the photoelectric detection module is used for detecting whether the packaging unit is in place or not and feeding back an in-place signal to the MCU control unit; the temperature detection module is connected with the motor, detects the temperature of the motor and feeds a temperature signal back to the MCU control unit; the current detection module detects the current in the motor and feeds a current signal back to the MCU control unit; the power supply module supplies power to the MCU control unit and the photoelectric detection module; the motor is connected with the MCU control unit;
after the MCU control unit receives a packaging unit in-place signal fed back by the photoelectric detection module and a microswitch off-signal sent by the system controller, or after the MCU control unit receives a microswitch off-signal sent by the system controller and a packaging unit in-place signal fed back by the photoelectric detection module sent by the system controller, if the MCU control unit judges that the current value and the temperature value of the motor are below the set values, the MCU control unit controls the motor to be electrified and operated.
And the system further comprises a CAN bus communication module which provides a CAN bus communication interface and connects the system controller with the MCU control unit in a communication way.
Further, the MCU control unit feeds the received in-place signal, the temperature signal and the current signal back to the system controller through a CAN bus; the control signal comprises a micro switch disconnection signal and a packaging unit in-place signal.
Further, the device also comprises a storage unit which is connected with the MCU control unit; and after reading the address in the storage unit, the MCU control unit starts to judge the current value and the temperature value of the motor.
Further, the device also comprises a motor driving module which is electrically connected with the MCU control unit, the current detection module and the motor; the current detection module detects the current of the motor driving module so as to detect the current value of the motor; the MCU control unit controls the power supply of the motor driving module to be switched on and off so as to work the working motor.
Furthermore, the motor driving module is controlled by combining an optical coupler and a silicon controlled rectifier, so that the service life is prolonged.
The temperature detection module is connected with the MCU control unit through the AD conversion module, and the current detection module is connected with the MCU control unit through the AD conversion module; the AD conversion module is used for converting the detected temperature value and the detected current value into corresponding temperature signals and current signals.
In another aspect, there is provided a control method of a PDU controller based on a thick film circuit, using the controller as described above, the method including:
the MCU control unit reads the address in the storage unit, and the address is read successfully;
after the MCU control unit receives a packaging unit in-place signal fed back by the photoelectric detection module and a microswitch off signal sent by the system controller, or after the MCU control unit receives a microswitch off signal sent by the system controller and a packaging unit in-place signal fed back by the photoelectric detection module sent by the system controller; judging whether the current value of the motor is over-current or not, if so, controlling the motor to be powered off, and feeding back an over-current state signal to a system controller; if the current value is not over-current, judging whether the temperature value of the motor exceeds a set value or not, if the temperature value exceeds the set value, controlling the motor to be powered off, and feeding back an overheating state signal to a system controller; if the temperature value does not exceed the set value, the motor is controlled to be electrified and work.
Further, the air conditioner is provided with a fan,
the MCU control unit simultaneously receives a signal sent by the system controller and an in-place signal fed back by the photoelectric detection module, and feeds back the in-place signal sent by the photoelectric detection module to the system controller so as to cover an initial in-place signal in the system controller;
the MCU control unit sequentially judges whether the current value of the motor is overcurrent and whether the temperature value exceeds a set value; if the current value is not overcurrent and the temperature value is not more than the set value, the MCU control unit controls the motor to be electrified and work.
The invention has the technical effects that:
the invention adds a judgment logic signal, adopts various control logics and is used for reducing the failure probability of the power driving device in the actual work, namely when a photoelectric detection module of a product fails, the controller can normally operate by receiving the control signal of the system controller;
CAN bus communication is adopted for bidirectional information transmission with a system controller; and a silicon controlled rectifier control circuit is adopted, so that the service life of the product is prolonged.
Drawings
FIG. 1 is a general block diagram of a hardware system;
fig. 2 is a logic block diagram of the controller.
Detailed Description
Example 1
Fig. 1 is a general block diagram of a hardware system, as shown in fig. 1, which is a thick film circuit-based PDU controller of this embodiment, and includes: the MCU control unit receives a control signal sent by the system controller; the photoelectric detection module is used for detecting whether the packaging unit is in place or not and feeding back an in-place signal to the MCU control unit; the temperature detection module is connected with the motor, detects the temperature of the motor and feeds a temperature signal back to the MCU control unit; the current detection module detects the current in the motor and feeds a current signal back to the MCU control unit; the power supply module supplies power to the MCU control unit and the photoelectric detection module; the motor is connected with the MCU control unit;
after the MCU control unit receives a packaging unit in-place signal fed back by the photoelectric detection module and a microswitch off-signal sent by the system controller, or after the MCU control unit receives a microswitch off-signal sent by the system controller and a packaging unit in-place signal fed back by the photoelectric detection module sent by the system controller, if the MCU control unit judges that the current value and the temperature value of the motor are below the set values, the MCU control unit controls the motor to be electrified and operated.
In this embodiment, a control logic is provided for reducing the failure probability of the power driving apparatus in actual operation, that is, when the product photoelectric sensor fails, the controller can also operate normally by receiving the photoelectric sensor signal from the system controller.
In this embodiment, the MCU control unit module adopts a 32-bit embedded microcontroller of model STM32F103C8T6, and has a CAN bus communication function. The hardware-minimum system of the MCU refers to the lowest-scale peripheral circuit necessary to enable the internal program to run. Generally, the MCU hardware minimum system is composed of an MCU, a crystal oscillator circuit, and a reset circuit. Based on the idea, the STM32F103C8T6 minimum system hardware system comprises an MCU, a crystal oscillator circuit and a reset circuit.
In this embodiment, the temperature detection module is designed to prevent the power driving device from being burnt out due to an excessively high internal temperature of the motor during operation. The temperature detection module collects the internal temperature of the motor through the temperature sensor, converts an analog signal into a digital signal through the signal conversion circuit and transmits the digital signal to the MCU control unit. Specifically, the integrated MAX31865 chip is adopted, signals at two ends of a thermistor on a motor of the power driving device are directly collected, the circuit of the method is simple, the use is convenient, the precision is high, and the PT100 thermal resistor is calibrated without a later test.
In this embodiment, the related photoelectric detection module is used for detecting whether the container unit is in place, and after the MCU control unit receives the container unit in-place signal fed back by the photoelectric detection module and the micro-switch off signal sent by the system controller, the current value and the temperature value of the motor are determined, and the motor is powered. Or when the MCU control unit receives a micro switch off signal sent by the system controller and a container unit in-place signal fed back by the photoelectric detection module sent by the system controller, the current value and the temperature value of the motor are judged, and the motor is powered. At this time, the MCU control unit will supply power to the motor of the power driving device. The photoelectric detection module is a photoelectric sensor, and the photoelectric sensor selects CNY 70. The infrared light emitting diode of the photoelectric sensor emits light, the light is reflected back by the packaging unit, the phototriode is conducted by light, voltage signals of a collector electrode of the phototriode are collected and transmitted to the AD converter, analog signals are converted into digital signals, and the digital signals are transmitted to the MCU control unit.
Furthermore, the PDU controller based on the thick film circuit also comprises a CAN bus communication module which provides a CAN bus communication interface and connects the system controller with the MCU control unit in a communication way. The MCU control unit feeds the received in-place signal, the temperature signal and the current signal back to the system controller through a CAN bus; the control signal comprises a micro switch disconnection signal and a packaging unit in-place signal.
In this embodiment, a CAN bus communication module is used for bidirectional information transmission between the power driving device controller and the system controller. The system controller sends the micro switch signal and the photoelectric sensor signals of other units to the MCU control unit through the CAN bus, and the MCU control unit feeds back the photoelectric sensor signals of the MCU control unit and the state information of the motor and the controller to the system controller through the CAN bus. In this embodiment, the MCP2551 is a CAN bus transceiver, and is connected to the STM32F103RCT6 of the built-in CAN controller through the pin TXD and the pin RXD. The MCP2551 is a standard high-speed CAN transceiver element, has the speed of 1Mbps, CAN provide differential transmission performance for a CAN bus and differential receiving performance for a CAN controller, has extremely low electromagnetic radiation, and CAN be connected with 110 nodes at most.
Furthermore, the thick film circuit-based PDU controller also comprises a storage unit which is connected with the MCU control unit; and after reading the address in the storage unit, the MCU control unit starts to judge the current value and the temperature value of the motor. When the MCU control unit is powered on, the MCU control unit is initialized, self-checking is started, an address in a memory in the cable is read, and after the address is successfully read, the MCU control unit can enter a logic judgment process all the time.
Furthermore, the thick film circuit-based PDU controller also comprises a motor driving module which is electrically connected with the MCU control unit, the current detection module and the motor; the current detection module detects the current of the motor driving module so as to detect the current value of the motor; the MCU control unit controls the power supply of the motor driving module to be switched on and off so as to control the motor to work. The motor driving module is controlled by combining an optical coupler and a silicon controlled rectifier, so that the service life is prolonged.
In this embodiment, what motor drive module adopted is the combination control mode of opto-coupler and silicon controlled rectifier, compares in the relay control motor drive's that traditional controller adopted mode, and the silicon controlled rectifier is a security performance higher, can not produce instantaneous current, and the higher electronic components of cost completely. The controllable silicon is used for regulating and controlling the driving power, so that the non-contact control is realized in the working process, the phenomena of spark (namely instantaneous current) and contact burning are avoided, and all loads in the circuit work together all the time no matter the power, thereby reducing the load of the load, prolonging the service life of the load and reducing the power attenuation; and sparks are avoided, and the stability of a control system is improved. Specifically, in the present embodiment, the TLP161G element is used as a photocoupler, and the TLP with three-terminal bidirectional output is suitable for low-current switching application. The input and the output of the photoelectric coupler are isolated from each other, the electric signal transmission has the characteristic of unidirectionality, and the photoelectric coupler has good electric insulation capacity and anti-interference capacity, can prevent the power current in the three-phase motor coil from influencing the control circuit, and protects the control circuit.
Example 2
Fig. 2 is a logic block diagram of a controller, as shown in fig. 2, according to the present embodiment. When the MCU control unit is powered on, the MCU control unit is initialized and starts self-checking. And reading the address in the memory in the cable, and after the address is successfully read, the MCU control unit can enter the logic judgment process all the time.
When the system controller sends a micro switch off signal and a packaging unit in-place signal to the MCU control unit, the photoelectric detection module does not detect the packaging unit, namely when an event A occurs; the MCU control unit judges whether the current value of the motor is over-current or not, controls the motor to be powered off if the current value is over-current, and feeds back an over-current state signal to the system controller; if the current value is not over-current, judging whether the temperature value of the motor exceeds a set value or not, if the temperature value exceeds the set value, controlling the motor to be powered off, and feeding back an overheating state signal to a system controller; if the temperature value does not exceed the set value, the motor is controlled to be electrified and work.
After the system controller sends a micro switch off signal and a container unit in-place signal to the MCU control unit, and the photoelectric detection module detects the container unit, namely when an event B occurs: the MCU control unit feeds back the in-place signal sent by the photoelectric detection module to the system controller so as to cover the initial in-place signal in the system controller and reset the initial packaging unit in-place signal in the system controller. Then, the MCU control unit judges whether the current value of the motor is over-current, if so, the motor is controlled to be powered off, and an over-current state signal is fed back to the system controller; if the current value is not over-current, judging whether the temperature value of the motor exceeds a set value or not, if the temperature value exceeds the set value, controlling the motor to be powered off, and feeding back an overheating state signal to a system controller; if the temperature value does not exceed the set value, the motor is controlled to be electrified and work.
When the system controller sends a micro switch off signal and does not send a container unit in-place signal to the MCU control unit, the photoelectric detection module detects the container unit, namely when an event C occurs: the MCU control unit judges whether the current value of the motor is over-current or not, controls the motor to be powered off if the current value is over-current, and feeds back an over-current state signal to the system controller; if the current value is not over-current, judging whether the temperature value of the motor exceeds a set value or not, if the temperature value exceeds the set value, controlling the motor to be powered off, and feeding back an overheating state signal to a system controller; if the temperature value does not exceed the set value, the motor is controlled to be electrified and work.
In addition, in this embodiment, the MCU control unit further includes two timer interrupt modules, a CAN receive interrupt module, and a USART receive interrupt module. As shown in fig. 2, the timer 2 interrupt module and the timer 3 interrupt module are used to send motor status signals to the system controller at regular time intervals. The CAN reception interrupt is used for receiving an instruction sent by a system controller. When the USART interruption is used for debugging the control assembly, the upper and lower threshold values of the temperature (for example, 90-120 ℃), the photoelectric detection reference value and the upper and lower threshold values of the motor current (for example, 7.5-8.0A) are dynamically changed, so that the debugging of the control assembly is facilitated.
Claims (9)
1. A PDU controller based on thick film circuitry, comprising: the MCU control unit receives a control signal sent by the system controller; the photoelectric detection module is used for detecting whether the packaging unit is in place or not and feeding back an in-place signal to the MCU control unit; the temperature detection module is connected with the motor, detects the temperature of the motor and feeds a temperature signal back to the MCU control unit; the current detection module detects the current in the motor and feeds a current signal back to the MCU control unit; the power supply module supplies power to the MCU control unit and the photoelectric detection module; the motor is connected with the MCU control unit;
after the MCU control unit receives a container unit in-place signal fed back by the photoelectric detection module and a microswitch off-signal sent by the system controller, or after the MCU control unit receives the microswitch off-signal sent by the system controller and a container unit in-place signal fed back by the photoelectric detection module sent by the system controller, if the MCU control unit judges that the current value and the temperature value of the motor are below the set values, the MCU control unit controls the motor to be electrified to work.
2. The PDU controller of claim 1 further comprising a CAN bus communication module providing a CAN bus communication interface for communicatively coupling the system controller with the MCU control unit.
3. The PDU controller of claim 2 wherein the MCU control unit feeds back the received in-place signal, temperature signal and current signal to the system controller through the CAN bus.
4. The PDU controller of claim 1 further comprising a memory unit connected to the MCU control unit; and after reading the address in the storage unit, the MCU control unit starts to judge the current value and the temperature value of the motor.
5. The PDU controller of claim 1, further comprising a motor driving module electrically connected to the MCU control unit, the current detection module and the motor; the current detection module detects the current of the motor driving module so as to detect the current value of the motor; the MCU control unit controls the power supply of the motor driving module to be switched on and off so as to control the motor to work.
6. The PDU controller of claim 5 wherein the motor drive module is controlled by a combination of an optocoupler and a thyristor to improve service life.
7. The PDU controller of claim 1, further comprising a plurality of AD conversion modules, wherein the temperature detection module is connected with the MCU control unit through the AD conversion module, and the current detection module is connected with the MCU control unit through the AD conversion module; the AD conversion module is used for converting the detected temperature value and the detected current value into corresponding temperature signals and current signals.
8. A control method of a PDU controller based on a thick film circuit, using the controller of any one of claims 1 to 7, the method comprising:
the MCU control unit reads the address in the storage unit, and the address is read successfully;
after the MCU control unit receives a packaging unit in-place signal fed back by the photoelectric detection module and a microswitch off signal sent by the system controller, or after the MCU control unit receives a microswitch off signal sent by the system controller and a packaging unit in-place signal fed back by the photoelectric detection module sent by the system controller; judging whether the current value of the motor is over-current or not, if so, controlling the motor to be powered off, and feeding back an over-current state signal to a system controller; if the current value is not over-current, judging whether the temperature value of the motor exceeds a set value or not, if the temperature value exceeds the set value, controlling the motor to be powered off, and feeding back an overheating state signal to a system controller; if the temperature value does not exceed the set value, the motor is controlled to be electrified and work.
9. The control method according to claim 8, characterized in that the method further comprises:
the MCU control unit simultaneously receives a signal sent by the system controller and an in-place signal fed back by the photoelectric detection module, and feeds back the in-place signal sent by the photoelectric detection module to the system controller so as to cover an initial in-place signal in the system controller;
the MCU control unit sequentially judges whether the current value of the motor is overcurrent and whether the temperature value exceeds a set value; if the current value is not overcurrent and the temperature value is not more than the set value, the MCU control unit controls the motor to be electrified and work.
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| CN202010454506.5A CN111522279A (en) | 2020-05-26 | 2020-05-26 | PDU controller based on thick film circuit and control method thereof |
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| CN202010454506.5A CN111522279A (en) | 2020-05-26 | 2020-05-26 | PDU controller based on thick film circuit and control method thereof |
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| CN210225051U (en) * | 2019-07-15 | 2020-03-31 | 浙江正泰电器股份有限公司 | Automatic change-over switch electric appliance |
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| CN1827928A (en) * | 2005-03-04 | 2006-09-06 | 日立建机株式会社 | Safety device and service system for operation mechanism |
| CN201793327U (en) * | 2010-09-08 | 2011-04-13 | 鞍钢股份有限公司 | Waiting position signal device of dry quenching hoister |
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Application publication date: 20200811 |