CN110596614B

CN110596614B - BIT method for protecting independent power supply module in recorder

Info

Publication number: CN110596614B
Application number: CN201910647275.7A
Authority: CN
Inventors: 郭锁林; 屠晓涛; 傅康毅
Original assignee: Shaanxi Qianshan Avionics Co Ltd
Current assignee: Shaanxi Qianshan Avionics Co Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2022-03-08
Anticipated expiration: 2039-07-17
Also published as: CN110596614A

Abstract

The invention provides a BIT method for protecting an independent power module in a recorder, which comprises the following steps: step 1: setting a power failure indication signal; step 2: detecting an independent power supply BIT in data management module software in a protection recorder; and step 3: and judging the failure of the independent power supply function of the protection recorder. The invention can conveniently and quickly detect whether the function of the independent power supply module in the product is invalid or not through the BIT function setting of the product under the condition that the case is not disassembled, thereby being convenient for the maintenance of the product.

Description

BIT method for protecting independent power supply module in recorder

Technical Field

The invention belongs to the technical field of avionics, and particularly relates to a BIT method for protecting an internal independent power module of a recorder (commonly called a black box).

Background

The protection recorder is used for the avionic equipment which is used for completing the task of acquiring and recording the flight data information of the whole operation process of the aircraft, and the crash protection component in the protection recorder has the protection capabilities of impact resistance, fire resistance, corrosion resistance and the like so as to store the recorded information after a flight accident happens. The device is mainly used for maintenance of aircrafts, flight training and examination, accident investigation and analysis and the like.

At present, the novel protection recorder has an independent power supply function. As the minimum performance requirement, the independent power supply function of the protection recorder can independently support the protection recorder and the microphone in the cockpit area matched with the protection recorder to continuously work within a short time period (10 minutes) after the power failure of the power supply of the aircraft, so that the acquisition, recording and storage of the cockpit voice data information at the key moment are completed, and a scientific basis is provided for accident analysis. But at present, whether the function of the independent power supply module in the product fails or not can be detected only by a manual mode, which is very inconvenient.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a BIT method for protecting an independent power module in a recorder, which can conveniently and quickly detect whether the function of the independent power module in the product fails or not through the BIT function setting of the product under the condition that a case is not disassembled, and is convenient for product maintenance.

The technical scheme is as follows:

a BIT method for protecting an independent power module in a recorder specifically comprises the following steps:

step 1: setting a power failure indication signal;

step 2: detecting an independent power supply BIT in data management module software in a protection recorder;

and step 3: and judging the failure of the independent power supply function of the protection recorder.

The step 1 specifically comprises the following steps: A28V direct current power supply monitoring circuit of an aircraft is designed in an internal power supply module of the protection recorder, and a power failure indication signal is output when the power failure monitoring circuit is powered down.

Step 2, designing a BIT detection function in the data management module software in the protection recorder, specifically:

1) powering up the protection recorder;

1) designing a BIT detection function in data management module software in a protection recorder:

a) setting the variable x to be 0 invalid and the variable y to be 0 invalid; setting timers T1 and T2, wherein T1 starts to count time;

b) when a timer T1 times N1 minutes, setting a variable x to be 1 valid, and writing the variable x to be 1 valid into a flash data storage area of the protective recorder;

c) monitoring the state of the power-down indication signal in real time, and starting a timer T2 to start timing after the power-down indication signal is effective;

d) when the timer T2 times N2 minutes, the variable y is set to 1 valid, and the variable y is written into the guard recorder flash data storage area in a valid state of 1.

The step 3 specifically comprises the following steps: after the protection recorder is electrified, the data management module software reads the states of variables x and y in the flash data storage area; and simultaneously, resetting the information of the variables x and y in the flash data storage area. When the variable x is judged to be valid as 1 and the variable y is judged to be valid as 1, setting the independent power supply function state of the protection recorder to be normal; and when the variable x is judged to be valid at 1 and the variable y is judged to be invalid at 0, the independent power supply function of the protection recorder is set to be invalid.

Has the advantages that: the invention can conveniently and effectively solve the problem of detecting the function of the independent power supply in the aircraft protection recorder. The method has the following beneficial effects:

a) the invention can effectively solve the problem of detecting the function of the independent power supply in the aircraft protection recorder, and can finish the detection of the function of the independent power supply in the product under the conditions that the product is not detached from the aircraft, the cover plate is not disassembled, and the manual auxiliary detection is not needed;

b) the invention improves the product maintainability, can find the failure problem of the independent power supply function of the protection recorder in time, solves the problem of inconvenient detection and effectively ensures the integrity of the product function.

Drawings

Fig. 1 is a schematic diagram of a power down detection circuit for an aircraft power supply of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings, which refer to fig. 1.

1) Setting a power-down indication signal: designing an aircraft 28V direct current power supply monitoring circuit in an internal power supply module of the protection recorder, and outputting a power failure indication signal when the aircraft is powered down;

2) designing a BIT detection function in data management module software in a protection recorder:

a) after the product is electrified and the initialization function is completed, setting a variable x to be 0 invalid and setting a variable y to be 0 invalid; setting timers T1 and T2, wherein T1 starts to count time;

b) when the timer T1 times for 15 minutes, setting a variable x to be 1 valid, writing the variable x into a flash data storage area of a protection recorder, indicating that the charging time of the independent power supply is enough after the product is electrified, and achieving the judgment condition of the function failure of the independent power supply, so as to prevent the product from triggering a false alarm due to the fact that the independent power supply does not finish charging under the condition that the product is repeatedly electrified within a short time (15 minutes);

c) and monitoring the power failure indication signal state in real time in the running process of software. After the power supply of the aircraft is powered off, namely a power-off indication signal is effective, starting a timer T2 to start timing;

d) when the timer T2 times for 10 minutes, setting the variable y to be 1 valid, which indicates that the discharge time of the independent power supply of the protection recorder reaches 10 minutes and meets the requirement; and writing the valid state of y 1 into a flash data storage area of the protection recorder (the actual writing takes 0.6 milliseconds), so that the next time of power-on reading and distinguishing of the product are facilitated. The output power supply time of the independent power supply of the protection recorder is set to 10 minutes and 5 seconds, namely, information can be written in before the output power supply of the independent power supply of the protection recorder is disconnected;

f) the independent power supply of the protection recorder is automatically disconnected after 10 minutes and 5 seconds, namely the protection recorder stops working;

3) and (3) judging the functional failure of the independent power supply of the protection recorder: after the protection recorder is electrified, the data management module software reads the states of variables x and y in the flash data storage area; and simultaneously, resetting the information of the variables x and y in the flash data storage area. When the variable x is judged to be valid as 1 and the variable y is judged to be valid as 1, setting the independent power supply function state of the protection recorder to be normal; and if the judgment variable x is 1 valid and y is 0 invalid, otherwise, the function of the independent power supply of the protection recorder is set to be invalid, and the product lights a fault lamp and outputs failure fault information of the function of the independent power supply of the protection recorder when BIT (BIT detection).

Claims

1. A BIT method for protecting an independent power module in a recorder is characterized in that the BIT detection method comprises the following steps:

step 1: setting a power failure indication signal;

and step 3: judging the functional failure of the independent power supply of the protection recorder;

the step 2 is used for designing a BIT detection function in data management module software in the protection recorder, and specifically comprises the following steps:

1) powering up the protection recorder;

d) when the timer T2 times N2 minutes, setting the variable y to be 1 valid, and writing the variable y to be 1 valid into the flash data storage area of the protective recorder;

the step 3 specifically comprises the following steps: after the protection recorder is electrified, the data management module software reads the states of the variables x and y in the flash data storage area and clears the information of the variables x and y in the flash data storage area; when the variable x is judged to be valid as 1 and the variable y is judged to be valid as 1, setting the independent power supply function state of the protection recorder to be normal; and when the variable x is judged to be valid at 1 and the variable y is judged to be invalid at 0, the independent power supply function of the protection recorder is set to be invalid.

2. The BIT method for protecting an independent power module inside a recorder as claimed in claim 1, wherein the step 1 is specifically as follows: A28V direct current power supply monitoring circuit of an aircraft is designed in an internal power supply module of the protection recorder, and a power failure indication signal is output when the power failure monitoring circuit is powered down.