Solid recorder for posture measuring

[0024] The attitude measurement solid-state recorder, as shown in Figures 1 and 2, includes a stepped cylindrical protective body composed of an upper cylindrical body 1, a baffle 2 and a lower cylindrical body 3, and a protective cover 4 is provided at both ends of the protective body. The upper cylinder 1 is equipped with a recorder. The recorder is composed of a recorder shell 5, a recorder liner 6 installed therein, and a recorder top cover 7 threaded with the recorder shell. The recorder liner 6 It is equipped with a collection, storage circuit board 8 and a power supply battery for powering it. The power supply battery includes a rechargeable battery 17 and a non-rechargeable battery 18, such as Figure 8 As shown, in the recorder inner tank 6, a partition 15 is provided between the acquisition and editing storage circuit board 8 and the power supply battery, and the recorder inner container 6 is provided between the acquisition and editing, storage circuit board 8, the power supply battery and the recorder housing 5. There is a potting buffer layer 16; the recorder shell 5 is made of steel, the protective body is made of aluminum, and a buffer layer is added between the recorder shell and the protective body. The upper cylinder body 1 is also provided with an insulating sleeve 9 that cooperates with the lower cylinder body 3, and the top side of the insulating sleeve 9 is provided with a charging port 19 and a protective cover 20 that are connected to the power module 11 by a wire. The side is provided with a test port 21 and a protective cover 22; the lower cylindrical body 3 is sequentially equipped with an inertial measurement unit 10 and a power module 11 connected to it by a wire and its end cover 12, and the power module 11 is provided with a power supply battery connection The power supply module 11 is also provided with a starting circuit board for triggering its work. The control circuit that realizes the function of the starting circuit board can be implemented in various forms. The present invention provides the following implementation forms: integrated on the circuit board Circuit chip BTS428LS (package TO 252-5-11), several diodes (model MMSD4148LT1, 0805 package), several capacitors (its capacitance value is 104,0805 package) and several resistors (resistance value is 3K, package 0805), For the integrated circuit chip BTS428LS, its function is to supply power to the inertial measurement unit when the chip is at a high level (the voltage value is greater than 1.6V and less than 3.3V); otherwise, the circuit is in a low-power waiting state ;

[0025] The top cover 7 of the recorder, the outer wall of the insulating sleeve 9 and the lower cylindrical body 3 are respectively provided with wiring grooves 14, and the collection and storage circuit board 8 is connected to the inertial measurement assembly 10 through the wires passing through the wiring grooves. Use high-temperature silver-plated wires.

[0026] Such as image 3 As shown, the acquisition and storage circuit board 8 adopts a folding structure. The size of a single circuit board is 28mm×22.5mm×1.5mm, and the volume of the connection will not exceed 28mm×22.5mm×8mm. The two layers are connected by resistance legs. , The first layer is the analog part, which mainly includes analog signal conditioning circuits; the second layer is the digital part, including A/D conversion circuits, control circuits, etc., which are mainly responsible for completing data control and storage, and can be programmed online; in specific implementation, The acquisition and control of the circuit board can be realized by FPGA. By changing the internal logic program of FPGA, the channel sampling rate of the recorder can be flexibly adjusted; and the storage medium on the circuit board adopts Flash Memory, which has small size and large single chip capacity , Low cost, non-volatile, strong anti-overload ability, etc.; the storage method adopts, the memory block recording method. For example, a piece of FLASH memory has a storage capacity of 128M Bytes. According to the calculation of the capacity of 32M Bytes, all the data of the whole process can be recorded. Then the FLASH internal storage method is divided into 4 blocks according to the order of the block address, each block is 32M Bytes. When data is stored, check whether there is data in the first block each time. If not, write the recorded data started in the first block sequentially until the first block is full, then stop recording and the system is shut down. Electricity. After the power is turned off, the next time the recording is started, it will also check whether there is data in the first block. If there is data, then check whether there is data in the next block. If there is no data, then write in order. If there is data, then the address will jump to the next one in order. One block, the recording is full, stop, and so on, until all 4 blocks are written with data, no matter how the recording is started, the data will not be overwritten and written again, unless the data in the recorder is cleared by the erase operation. This multi-start recorder, memory block recording technology has a certain redundancy design, which can prevent the failure of the entire test caused by false start. This technology has very important significance in the actual test.

[0027] Such as Figure 4 As shown, the wiring groove on the top cover 7 of the recorder is fan-shaped. Because it is fan-shaped, it can be “S-shaped” and completed through assembly process. Using the "S-type" wiring method, the purpose is to have a margin for elongation when the high-temperature silver-plated wire is subjected to a large external force, and to prevent the high-temperature silver-plated wire from being broken under high overload conditions.

[0028] Such as Figure 5 , 6 As shown in 7, the center and periphery of the baffle 2 are respectively provided with assembling holes 23, rectangular holes 24 are opened on both sides of the center of the baffle, and an inertial measurement combination outlet hole 25 is opened on the center line perpendicular to the rectangular hole.

[0029] The specific working process of the present invention is as follows: install the attitude measurement solid-state recorder on the aircraft, check whether its working status is normal through the test port, and perform debugging. Due to the transmission overload of the aircraft, the overload switch is closed for more than 3 seconds (3 seconds). The following systems do not work), the power supply battery on the recorder starts to supply power to the recorder, and the recorder starts to work. When the recorder starts to work, even if the overload switch is turned off, it will not affect the working state of the system, thus ensuring the reliability of the system after startup. When the recorder is working, the power module also starts to work under the action of its internal startup circuit board, and continuously powers the inertial measurement unit. At this time, the inertial measurement unit obtains various attitude parameters of the external weapon and transmits the signal through the wire For the recorder, through the FPGA internal logic program control, the recorder enters to collect the output signals of the inertial measurement combination, and encode and store these output signals, so as to realize the acquisition, editing and storage functions of the recorder; when the recorder is full, The system is automatically powered off and is in a low-power waiting state. After the aircraft landed, the recorder was recovered, and the data in the recorder was read out and saved through the ground test system, thereby completing the record of the weapon's entire flight attitude and the record of the weapon's penetration angle on the ground.