CN109828175B - Built-in test method for electronic sequential assembly - Google Patents
Built-in test method for electronic sequential assembly Download PDFInfo
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- CN109828175B CN109828175B CN201910194381.4A CN201910194381A CN109828175B CN 109828175 B CN109828175 B CN 109828175B CN 201910194381 A CN201910194381 A CN 201910194381A CN 109828175 B CN109828175 B CN 109828175B
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Abstract
The invention discloses a built-in test method of an electronic sequence assembly, wherein a pin 1 of an IC4A of the electronic sequence assembly receives a sequence pulse sent by a dongle through an IC5, the pin 4 of the IC4A is always in a low level state, when a printed board fails, the dongle does not work, the IC5 stops sending the sequence pulse, the pin 4 of the IC4A becomes a high level, and at the moment, a magnetic indicator lamp 1 is lightened, and the printed board with an error number of 0x01 is failed. The invention realizes the monitoring, parameter limiting, automatic parking protection, fault detection and isolation of the starting and running parameters of the APU by the electronic sequence component through self-checking of the electronic sequence component, and has the functions of fault warning and fault indication.
Description
Technical Field
The invention belongs to the technical field of control and monitoring of Auxiliary Power Units (APU) of an electronic sequential assembly, and particularly relates to an internal test method of the electronic sequential assembly.
Background
Modern electronic equipment is more and more complex, and particularly, new technologies such as large-scale integrated circuits are increasingly used in numerous large-scale electronic equipment, once the equipment is obstructed, fault detection and isolation time is long, and maintenance workload is rapidly increased, so that safe and reliable operation and rapid maintenance of the equipment are very important. With the application and development of computer technology, a technology (BIT: build-in test) that relies on the circuit and program of the electronic equipment to perform fault diagnosis and fault isolation is also widely used. The fault diagnosis system can automatically detect, diagnose and isolate the internal obstacles of the equipment/system, and greatly improves the fault diagnosis efficiency and accuracy in the electronic equipment, thereby reducing the maintenance cost and improving the usability of the electronic equipment. The equipment that accomplishes this function is called built-in self test equipment (BITE).
Disclosure of Invention
The invention aims to provide an electronic sequence assembly built-in test method, which realizes the monitoring, parameter limitation, automatic parking protection, fault detection and isolation of the starting and running parameters of an APU (auxiliary Power Unit) by an electronic sequence assembly through self-checking of the electronic sequence assembly, and has the functions of fault warning and fault indication.
The invention is mainly realized by the following technical scheme: a pin 1 of an IC4A of an electronic sequence assembly receives a sequence pulse sent by a dongle through an IC5, a pin 4 of an IC4A is always in a low level state, when a printed board has a fault, the dongle does not work, the IC5 stops sending the sequence pulse, the pin 4 of the IC4A becomes a high level, and at the moment, a magnetic indicator lamp 1 is lightened, and the printed board with an error number of 0x01 is reported.
In the using process, when hardware fails, the fault reporting number 0x01 can directly feed back that the hardware has a problem, and a maintainer can quickly determine the fault position through fault indication to accelerate the processing speed; through direct feedback on the hardware, the electronic sequence assembly is enabled to detect and distinguish whether it is malfunctioning itself or the APU is malfunctioning. The invention sends the fault code when the fault occurs, so that a maintainer can quickly determine the position of the fault, judge the cause of the fault and accelerate the processing speed of the fault.
In order to better implement the invention, further, the self-detection of the electronic sequential assembly comprises operation instruction detection, timer self-detection, RAM self-detection and acquisition frequency circuit inspection; the operation instruction detection, the timer self-detection and the RAM self-detection are automatically performed when the electronic sequence assembly is powered on; the acquisition frequency circuit check is a self-check performed during the starting process of the electronic sequential assembly, and if an error occurs, a 0x02 fault is reported.
The invention carries out self-checking in the process of electrifying and starting the electronic sequence assembly, and when an error occurs, the problem occurs by reporting the error number 0x02 to feed back software; the electronic sequence component is detected during power-on and starting, so that the influence on the pneumatic sequence of the APU and the monitoring of the working state of the APU after starting when the electronic sequence component which is matched and arranged on the APU breaks down is avoided; ensure to report the error when APU monitors, the electron sequence subassembly can report the error fast and show, confirms fast and reports the error position, the analysis and the maintenance of the trouble of being convenient for.
In order to better implement the invention, the electronic sequence component is further designed by adopting an LRU level, can monitor self faults and APU operation faults, and can transmit fault information to the helicopter in the LRU level indication and APU fault information. According to the invention, through carrying out LRU level indication on the fault, fault information is indicated in the LRU level and the APU fault information is sent to the helicopter, so that the helicopter can quickly confirm the fault of the APU, and the fault processing rate is improved.
In order to better implement the invention, further, before the task: after power-on, self-checking, wherein the self-checking comprises an electronic sequence assembly for detecting whether an internal RAM, a singlechip instruction, a frequency measurement channel and a low oil pressure switch are disconnected or not, if the detection is abnormal, the system is stopped, and a fault code is given; in the task: in the whole process of starting and running of the APU, the internal part is continuously self-checked and the starting and running states of the APU are monitored, if the APU breaks down, the APU is immediately closed, and the fault state is reported to a pilot; after the task: and indicating the operation information of the APU after the APU stops operating and after the power is cut off.
The invention always monitors the APU through the electronic sequence component, ensures real-time feedback, assists the APU to work, immediately closes the APU when the APU breaks down, reduces the damage to the APU caused by continuous operation of the APU when the APU breaks down or influences the flight condition of the helicopter, and simultaneously, after the APU is powered off after a task, the electronic sequence component can indicate the operation information of the APU, check the whole operation process of the APU, facilitate the analysis of problems occurring in the operation of the APU and improve the practicability of the test of the electronic sequence component.
In order to better implement the invention, sensors of rotating speed, temperature, oil pressure and oil temperature are further installed on the APU to monitor the starting sequence and the working state of the APU. The invention can monitor the working state of each sensor of the APU by the electronic sequence component matching with the APU, and the faults occurring in the APU are respectively fed back to the corresponding fault indicator lamps by the electronic sequence component, so that the faults can be rapidly distinguished, and the analysis and the maintenance of the faults are accelerated.
In order to better realize the invention, further, a magnetic indicator is adopted to record and indicate information and store the information; when the APU breaks down, an APU function failure indicator lamp alarm signal is sent to the helicopter; when the APU lubricating oil temperature is high, an APU lubricating oil temperature high indicator lamp alarm signal is sent to the helicopter. The invention records and indicates signals through the magnetic indicator, and the electronic sequence component can keep storing information after power failure through the performance of the magnetic indicator.
In order to better realize the invention, a software and hardware filtering method is further adopted in the false alarm prevention of the electronic sequence component, so that the acquisition accuracy is increased; carrying out comprehensive self-detection after electrification; periodically detecting a peripheral circuit; the modules are independent, and the modules adopt a control structure with a single inlet and a single outlet; initializing and setting the memory to be 0; no unreferenced variables; without unused execution code.
According to the invention, through the false alarm prevention design, the electronic sequence component can not give an alarm due to false situations, the alarm quality is improved, unnecessary maintenance caused by false alarms is avoided, and the practicability of the invention is improved.
In order to better realize the invention, further comprising state monitoring, fault monitoring and fault isolation, the starting of the APU is controlled according to the starting sequence of the auxiliary power unit APU and the starting sequence state of the APU is indicated; monitoring starting and operating parameters of the APU, and performing parameter limitation and automatic parking protection; carrying out fault monitoring and isolation on the APU, and setting fault alarm and fault indication; self-testing the electronic sequential component. The invention can better perform control or monitoring of the APU through the self-detection of the electronic sequence assembly, perform parameter limitation and automatic parking protection on the APU through the electronic sequence assembly, quickly detect and isolate when a fault occurs, and quickly perform fault processing through fault codes and indication functions.
The invention has the beneficial effects that:
(1) when the hardware fails, the fault occurrence of the hardware can be directly fed back through reporting the error number 0x01, and a maintainer can quickly determine the fault position through fault indication to accelerate the processing speed; through direct feedback on the hardware, the electronic sequence assembly is enabled to detect and distinguish whether it is malfunctioning itself or the APU is malfunctioning. The invention sends the fault code when the fault occurs, so that a maintainer can quickly determine the position of the fault, judge the cause of the fault and accelerate the processing speed of the fault.
(2) By self-checking the electronic sequence assembly in the power-on and starting processes, when an error occurs, the software is fed back to cause a problem by reporting an error number 0x 02; the electronic sequence component is detected during power-on and starting, so that the influence on the pneumatic sequence of the APU and the monitoring of the working state of the APU after starting when the electronic sequence component which is matched and arranged on the APU breaks down is avoided; ensure to report the error when APU monitors, the electron sequence subassembly can report the error fast and show, confirms fast and reports the error position, the analysis and the maintenance of the trouble of being convenient for.
(3) The APU is monitored all the time through the electronic sequence assembly, real-time feedback is ensured, the auxiliary APU works, the APU is closed immediately when the APU breaks down, the damage to the APU or the flight condition of the helicopter caused by continuous operation of the APU when the APU breaks down is reduced, and meanwhile, after the APU is powered off after a task, the electronic sequence assembly can indicate the operation information of the APU, the whole operation process of the APU is checked, and the practicability of the test of the electronic sequence assembly is improved.
(4) And sensors of rotating speed, temperature, lubricating oil pressure and lubricating oil temperature are mounted on the APU to monitor the starting sequence and the working state of the APU. The invention can monitor the working state of each sensor of the APU by the electronic sequence component matching with the APU, and the faults occurring in the APU are respectively fed back to the corresponding fault indicator lamps by the electronic sequence component, so that the faults can be rapidly distinguished, and the analysis and the maintenance of the faults are accelerated.
(5) The magnetic indicator is adopted to record and indicate information, and the information is stored; when the APU breaks down, an APU function failure indicator lamp alarm signal is sent to the helicopter; when the APU lubricating oil temperature is high, an APU lubricating oil temperature high indicator lamp alarm signal is sent to the helicopter. The invention records and indicates signals through the magnetic indicator, and the electronic sequence component can keep storing information after power failure through the performance of the magnetic indicator.
(6) Through the false alarm prevention design, the electronic sequence component can not give an alarm due to false situations, the alarm quality is improved, unnecessary maintenance caused by false alarms is avoided, and the practicability of the electronic sequence component is improved.
Drawings
Fig. 1 is a BIT hardware circuit diagram.
Detailed Description
Example 1:
a built-in test method of an electronic sequential assembly is disclosed, as shown in figure 1, pin 1 of IC4A of the electronic sequential assembly receives a sequence pulse sent by a dongle through IC5, pin 4 of IC4A is always in a low level state, when a printed board has a fault, the dongle does not work, IC5 stops sending the sequence pulse, pin 4 of IC4A becomes a high level, at this time, a magnetic indicator light 1 is lighted, and the printed board with an error number of 0x01 is reported.
In the using process, when hardware fails, the fault reporting number 0x01 can directly feed back that the hardware has a problem, and a maintainer can quickly determine the fault position through fault indication to accelerate the processing speed; through direct feedback on the hardware, the electronic sequence assembly is enabled to detect and distinguish whether it is malfunctioning itself or the APU is malfunctioning. The invention sends the fault code when the fault occurs, so that a maintainer can quickly determine the position of the fault, judge the cause of the fault and accelerate the processing speed of the fault.
Example 2:
the embodiment is further optimized on the basis of embodiment 1, and the self-detection of the electronic sequential assembly comprises operation instruction detection, timer self-detection, RAM self-detection and acquisition frequency circuit inspection; the operation instruction detection, the timer self-detection and the RAM self-detection are automatically performed when the electronic sequence assembly is powered on; the acquisition frequency circuit check is a self-check performed during the starting process of the electronic sequential assembly, and if an error occurs, a 0x02 fault is reported.
The invention carries out self-checking in the process of electrifying and starting the electronic sequence assembly, and when an error occurs, the problem occurs by reporting the error number 0x02 to feed back software; the electronic sequence component is detected during power-on and starting, so that the influence on the pneumatic sequence of the APU and the monitoring of the working state of the APU after starting when the electronic sequence component which is matched and arranged on the APU breaks down is avoided; ensure to report the error when APU monitors, the electron sequence subassembly can report the error fast and show, confirms fast and reports the error position, the analysis and the maintenance of the trouble of being convenient for.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
the embodiment is further optimized on the basis of the embodiment 2, and before the task: after power-on, self-checking, wherein the self-checking comprises an electronic sequence assembly for detecting whether an internal RAM, a singlechip instruction, a frequency measurement channel and a low oil pressure switch are disconnected or not, if the detection is abnormal, the system is stopped, and a fault code is given; in the task: in the whole process of starting and running of the APU, the internal part is continuously self-checked and the starting and running states of the APU are monitored, if the APU breaks down, the APU is immediately closed, and the fault state is reported to a pilot; after the task: and indicating the operation information of the APU after the APU stops operating and after the power is cut off.
The invention always monitors the APU through the electronic sequence component, ensures real-time feedback, assists the APU to work, immediately closes the APU when the APU breaks down, reduces the damage to the APU caused by continuous operation of the APU when the APU breaks down or influences the flight condition of the helicopter, and simultaneously, after the APU is powered off after a task, the electronic sequence component can indicate the operation information of the APU, check the whole operation process of the APU, facilitate the analysis of problems occurring in the operation of the APU and improve the practicability of the test of the electronic sequence component.
The other parts of this embodiment are the same as those of embodiment 2, and thus are not described again.
Example 4:
the embodiment is further optimized on the basis of the embodiment 3, and the APU is provided with sensors of the rotating speed, the temperature, the lubricating oil pressure and the lubricating oil temperature so as to monitor the starting sequence and the working state of the APU; the magnetic indicator is adopted to record and indicate information, and the information is stored; when the APU breaks down, an APU function failure indicator lamp alarm signal is sent to the helicopter; when the APU lubricating oil temperature is high, an APU lubricating oil temperature high indicator lamp alarm signal is sent to the helicopter.
The invention can monitor the working state of each sensor of the APU by the electronic sequence component matching with the APU, and the faults occurring in the APU are respectively fed back to the corresponding fault indicator lamps by the electronic sequence component, so that the faults can be rapidly distinguished, and the analysis and the maintenance of the faults are accelerated; the recording and indication of signals is performed by magnetic indicators, the performance of which enables the electronic sequence assembly to maintain the storage of information after a power loss.
The other parts of this embodiment are the same as those of embodiment 3, and thus are not described again.
Example 5:
the embodiment is further optimized on the basis of any one of embodiments 1 to 4, and a software and hardware filtering method is adopted in the false alarm prevention of the electronic sequence component, so that the acquisition accuracy is increased; carrying out comprehensive self-detection after electrification; periodically detecting a peripheral circuit; the modules are independent, and the modules adopt a control structure with a single inlet and a single outlet; initializing and setting the memory to be 0; no unreferenced variables; without unused execution code.
According to the invention, through the false alarm prevention design, the electronic sequence component can not give an alarm due to false situations, the alarm quality is improved, unnecessary maintenance caused by false alarms is avoided, and the practicability of the invention is improved.
Other parts of this embodiment are the same as any of embodiments 1 to 4, and thus are not described again.
Example 6:
the method is further optimized on the basis of the embodiment 1, and comprises the steps of state monitoring, fault monitoring and fault isolation, wherein the starting of the APU is controlled according to the starting sequence of the auxiliary power unit APU, and the starting sequence state of the APU is indicated; monitoring starting and operating parameters of the APU, and performing parameter limitation and automatic parking protection; carrying out fault monitoring and isolation on the APU, and setting fault alarm and fault indication; self-testing the electronic sequential component. The invention can better perform control or monitoring of the APU through the self-detection of the electronic sequence assembly, perform parameter limitation and automatic parking protection on the APU through the electronic sequence assembly, quickly detect and isolate when a fault occurs, and quickly perform fault processing through fault codes and indication functions.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (5)
1. A built-in test method of an electronic sequential assembly is characterized in that a pin 1 of an IC4A of the electronic sequential assembly receives a sequence pulse sent by a dongle through an IC5, the pin 4 of the IC4A is always in a low level state, when a printed board fails, the dongle does not work, the IC5 stops sending the sequence pulse, the pin 4 of the IC4A becomes a high level, and at the moment, a magnetic indicator lamp 1 is lightened, and the printed board with an error number of 0x01 is failed;
the electronic sequence component self-detection comprises operation instruction detection, timer self-detection, RAM self-detection and acquisition frequency circuit inspection; the operation instruction detection, the timer self-detection and the RAM self-detection are automatically performed when the electronic sequence assembly is powered on; the acquisition frequency circuit check is self-check in the starting process of the electronic sequence assembly, and if an error occurs, a 0x02 fault is reported;
before the task: after power-on, self-checking, wherein the self-checking comprises an electronic sequence assembly for detecting whether an internal RAM, a singlechip instruction, a frequency measurement channel and a low oil pressure switch are disconnected or not, if the detection is abnormal, the system is stopped, and a fault code is given; in the task: in the whole process of starting and running of the APU, the internal part is continuously self-checked and the starting and running states of the APU are monitored, if the APU breaks down, the APU is immediately closed, and the fault state is reported to a pilot; after the task: and indicating the operation information of the APU after the APU stops operating and after the power is cut off.
2. The method of claim 1 wherein the APU is equipped with speed, temperature, oil pressure and oil temperature sensors to monitor the starting sequence and operating status of the APU.
3. The built-in test method for the electronic sequential assembly according to claim 2, wherein a magnetic indicator is used for recording and indicating information and storing; when the APU breaks down, an APU function failure indicator lamp alarm signal is sent to the helicopter; when the APU lubricating oil temperature is high, an APU lubricating oil temperature high indicator lamp alarm signal is sent to the helicopter.
4. The method for testing the electronic sequential component in the machine according to any one of claims 1 to 3, wherein software and hardware filtering is adopted in the false alarm prevention of the electronic sequential component, so that the acquisition accuracy is increased; carrying out comprehensive self-detection after electrification; periodically detecting a peripheral circuit; the modules are independent, and the modules adopt a control structure with a single inlet and a single outlet; initializing and setting the memory to be 0; no unreferenced variables; without unused execution code.
5. The method of claim 1, comprising the steps of monitoring status, monitoring faults, and isolating faults, wherein the method comprises controlling the start of the APU according to the start timing of the APU and indicating the status of the APU start timing; monitoring starting and operating parameters of the APU, and performing parameter limitation and automatic parking protection; carrying out fault monitoring and isolation on the APU, and setting fault alarm and fault indication; self-testing the electronic sequential component.
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