Some standard content:
Military standard for the electronics industry of the People's Republic of China FL1427
SJ20703—1998
General specification for TV seeker1998-03-18 Issued
1998-05-01 Implementation
Approved by the Ministry of Electronics Industry of the People's Republic of China1, Model
Referenced documents
Qualification appraisal·
Design requirements…
Performance characteristics requirements,
Environmental adaptability requirements·
Reliability
Maintainability
Requirements for parts and components…
Electromagnetic compatibility…
Dimensions
Appearance quality
Marks and codes
Quality assurance regulations||tt ||Inspection responsibility
Inspection classification
Inspection conditions…
Identification inspection
Quality consistency inspection.
Inspection method
Delivery preparation
Sealing and packaging…
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Warranty period
Notes
6.1 Intended use
6.2 Contents of order documents.
6.3 Definition
1 Scope
General specification for TV seeker, military standard of the electronics industry of the People's Republic of China
General specification for TV seeker 1.1 Subject content
This specification specifies the requirements, quality assurance provisions and delivery preparation for TV seekers. 1.2 Scope of application
SJ20703-1998
This specification applies to the design, production, testing and inspection of television guidance heads for various aircraft using television image guidance.
2 Reference documents
GB191—90 Packaging, storage and transportation pictorial symbols
GB2681—81: Wire colors in electrical complete setsGB5048—85 Moisture-proof packaging
GB6996.1--86 Transmission television comprehensive test chartGJB74.9—85 Acceptance rules for general technical conditions for ground radarGJB74.14-85 General technical conditions for ground radarMarking packaging, transportation and storageGJB150.3---86 Environmental test methods for military equipmentHigh temperature test
GJB150.4-—86 Environmental test methods for military equipmentLow temperature test
GJB150.5--86 Environmental test methods for military equipmentTemperature shock test
GJB150.6—86 Environmental test methods for military equipment Test methods Temperature-altitude test
GJB150.986 Environmental test methods for military equipment Swirl heat test GJB150.10—86 Environmental test methods for military equipment Fungal test GJB150.11—86 Environmental test methods for military equipment Salt spray test GJB150.15—86 Environmental test methods for military equipment Acceleration test GJB150.16--86 Environmental test methods for military equipment Vibration test GJB150.18--86 Environmental test methods for military equipment Shock test GJB151A--97 Requirements for electromagnetic emission and sensitivity of military equipment and subsystems Issued by the Ministry of Electronics Industry of the People's Republic of China on March 18, 1998 TiiKAoNrkAca
Implementation on May 1, 1998
SJ 20703—1998
GJB152A—97 Measurement of electromagnetic emission and sensitivity of military equipment and subsystemsGJB368.2—87 General specification for equipment maintainability Basic requirements for maintainabilityGJB368.5—87 General specification for equipment maintainability Test and evaluation of maintainabilityGJB369--87 General technical conditions for artillery optical instrumentsGJB437-—88 Military software development specification
GJB438—88 Military software documentation compilation specificationGJB439—88 Military software quality assurance specificationGJB450--88
General outline for reliability of equipment development and productionGJB899--90 Reliability appraisal and acceptance testQJ897 General specification for controlling product excess
3 Requirements
3.1 Qualification appraisal
Products submitted in accordance with this specification should be qualified products or approved products. 3.2 Design requirements
3.2.1 Reliability design
The reliability outline for the development and production of TV guidance heads should be prepared in accordance with the provisions of GJB450, and reliability design should be carried out.
3.2.2 Maintainability design
The maintainability design of TV guidance heads should be carried out in accordance with the provisions of GJB368.2. 3.2.3 Standardization design
3.2.3.1 The design of products and their parts and components must implement standardization requirements. 3.2.3.2 The selection and screening of all installed components should comply with the requirements of national standards, national military standards, professional standards and detailed specifications.
3.2.4 Structural design
3.2.4.1 The structural design of the product should be scientific, reasonable and applicable, with good process structure and meet the requirements of ergonomics.
3.2.4.2 The structural design of the product optical lens camera unit should take into account the requirements for adjusting the photoelectric axis and have sufficient rigidity to ensure the stability of the photoelectric axis. Under the condition of meeting the tactical performance requirements, the mass and size of the optical lens should be minimized.
3.2.4.3 The product design should be easy to install, debug, maintain, use and transport. The assembled parts and compartments of the product should be cleaned of excess materials according to the requirements of QJ897, and then the hatch cover should be closed. 3.3 Performance characteristics requirements
3.3.1 Terminal guidance distance
SJ20703—1998
The terminal guidance distance requirements for typical targets are as follows: a. For large and medium-sized ships, large ground buildings, and bridges: 10~15km; b. For small ships: 5~10km:
c. For tanks and military transport vehicles: 2~3km; Specific requirements and conditions are specified by detailed specifications. 3.3.2 Terminal guidance loss of control distance
Terminal guidance loss of control distance has different requirements for seekers of different types of targets. a. For large and medium-sized ships, large ground buildings, bridges, 150m; b. For small ships <100m;
c. For tanks <30m
3.3.3 Field of view
The field of view of the TV seeker is generally selected between 3 and 18°, and the specific value is specified by the detailed specifications. 3.3.4 Tracking angular velocity
The maximum tracking angular velocity of the TV seeker can be selected between 10 and 20°/s, and the specific value is specified by the detailed specifications. 3.3.5 Tracking accuracy
The angular tracking accuracy of the TV seeker is specified by the detailed specifications. 3.3.6 Probability of interception
Under the condition of human participation, the probability of the TV seeker intercepting the target should be 98%. The image metrics required for the test (such as S/N or contrast) are specified by the detailed specifications. 3.3.7 Motion capture capability
Under simple background and single target conditions, the TV seeker should be able to automatically search and capture targets with contrast that meets the specifications within the specified search range and distance at a certain search speed. Specific requirements are specified by the detailed specifications.
3.3.8 Image resolution
The image resolution (horizontal center) of the TV seeker should be ≥500 TV lines. 3.3.9 Video signal processing capability
The TV seeker should be able to automatically and reliably extract target signals with a contrast ≥10% and a size of not less than 3×3 pixels. The target image unit size is specified by the detailed specifications. Target contrast refers to the difference in optical brightness characteristics between the target and the adjacent background. In optoelectronic tracking measurement, it is usually expressed by formula (1):
Yz-Vgx100%
Yw-VBL
Wherein: C target contrast;
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V—self-standard video signal amplitude:
V—background video signal amplitude;
SJ20703—1998
Vw—-video signal peak level:
VBr—video signal blanking level:
Vt-V>0 When the target is brighter than the background, it is called a white target. When Vr-V<0, the target is darker than the background, it is called a black target. 3.3.10 Anti-background interference capability
The TV seeker should have a certain anti-background interference capability against the following interferences: a. Skyline:
b. Shadows formed by clouds in the sky:
c. Reflections on the sea surface:
d. Clouds in the sky:
e. Some ground background.
3.3.11 Self-check function
The TV seeker shall have the ability to conduct qualitative or quantitative self-checks of specified items according to functional characteristics and operational procedures.
3.3.12 Tracking mode
Depending on the purpose, the detailed specification may specify that the TV seeker shall have one or more of the following automatic tracking modes: 8. a. Point tracking (including centroid and edge tracking); b. Surface tracking (including correlation and feature matching tracking); c. Multi-mode tracking.
3.3.13 Signal processing time
3.3.13.1 The signal processing time in the search state can be selected within 20 to 200 ms, and the actual time shall be specified by the detailed specification.
3.3.13.2 The typical value of the signal processing time in the tracking state is stipulated as 20ms: 3.3.14 Lifespan
The service life of a TV guidance head is generally not less than 200h3.4 Environmental adaptability requirements
3.4.1 High temperature test
The TV guidance head should be able to work normally under a high temperature of 50℃. The TV guidance head is stored under 70"C high temperature conditions and should be able to work normally after returning to normal temperature. The storage time is specified in the detailed specifications.
3.4.2 Low temperature test
SJ20703-1998
The low temperature working conditions and storage conditions of the TV guidance head are selected from Table 1 according to the type of its carrier. The product should be able to work normally under the specified low temperature conditions and after the specified low temperature storage. Table 1bzxz.net
Missile type
Ship-mounted missile
Other missiles
3.4.3 Temperature shock test
Working temperature
Storage conditions
The overflow shock requirements of the TV guidance head are specified in the detailed specifications according to the type and purpose of its carrier and the requirements of Chapter 2 of GB150.5.
3.4.4 Temperature-altitude test
The temperature-altitude requirements of the TV guidance head shall be specified in accordance with the requirements of Chapter 2 of GJB150.6 and the detailed specifications according to the maximum flight altitude of its carrier (including the carrier of the missile). 3.4.5 Heat avoidance test
3.4.5.1 The test conditions shall be specified in the detailed specifications according to the requirements of Chapter 2 of GJB150.9. 3.4.5.2 Whether the guidance head is powered on during the test shall be specified in the detailed specifications. 3.4.5.3 After the test, the insulation resistance shall meet the requirements of Table 2, and the appearance shall meet the requirements of Article 3.14, Table 2
Environmental conditions
Standard atmospheric conditions for the test
Heat conditions
3.4.6 Fungus test
Insulation resistance
The TV guidance head shall be tested for 28 hours in accordance with the provisions of GJB150.10. d After the mold test, the degree of mold growth on its surface shall meet the requirements of Table 2 of this regulation, and its performance and appearance shall meet the requirements of Articles 3.3.1~3.3.13 and 3.14. 3.4.7 Salt spray test
3.4.7.1 Test conditions shall be carried out in accordance with the provisions of Chapter 2 of GJB150.11. 3.4.7.2 The test time shall be 48h or 96h according to the performance of the seeker, which shall be specified by the detailed specifications. 3.4.7.3 After the test, its performance shall meet the requirements of Articles 3.3.1~3.3.13, and its appearance shall meet the following requirements: a: The surface of metal parts should not be corroded; b. There should be no traces of electrochemical corrosion on the joints of metal parts; c. There shall be no cracks, bubbles, etc. on the surface coating. 3.4.8 Acceleration test
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SJ 207031998
3.4.8.1 The type and conditions of the acceleration test to which the TV seeker is subjected shall be specified in the detailed specifications according to the requirements of Chapter 2 of GJB 150.15 based on the type of missile and carrier. 3.4.8.2 After the test, a performance and appearance inspection shall be carried out, which shall comply with the requirements of Articles 3.3.1 to 3.3.13 and 3.14 respectively.
3.4.9 Vibration test
3.4.9.1 The type and conditions of the vibration test to which the TV seeker is subjected shall be specified in the detailed specifications according to the requirements of Chapter 2 of GJB150.16 based on the type of missile and carrier. 3.4.9.2 Whether the seeker is in working condition during the test shall be determined by the detailed specifications. 3.4.9.3 After the test, a performance and appearance inspection shall be carried out, which shall comply with the requirements of Articles 3.3.1 to 3.3.13 and 3.14 respectively. 3.4.10 Impact test
3.4.10.1 The type and conditions of the impact test of the TV guidance head shall be specified in detailed specifications according to the impact environment and purpose of the carrier.
3. 4. 10.2 After the test, the performance and appearance inspection shall be carried out, and the requirements of 3.3.1~3.3.13 and 3,14 shall be met respectively. 3.4.11 Transportation test
3.4.11.1 The level and conditions of the transportation test of the TV guidance head shall be specified in detailed specifications according to the requirements of Article 2.3.1 of GJB150.16
3.4.11.2 After the test, the performance and appearance inspection shall be carried out, and the requirements of 3.3.1~3.3.13 and 3.14 shall be met respectively. 3.5 Reliability
The reliability of the TV seeker is expressed by the mean time between failures (MTBF), and its lower limit (6,) should not be less than 100ha
3.6 Maintainability
3.6.1 The mean time to repair (MTTR) of the TV seeker is specified by the detailed specifications. 3.6.2 The TV seeker should have self-test and fault diagnosis functions. 3.B.3 The TV seeker should adopt a modular design and have interfaces for debugging and testing. Its structure and electrical connections should be easy to detect, quickly replace and repair. 3.6.4 In principle, the maintenance and inspection of the TV seeker can be carried out with ordinary test instruments such as multimeters, oscilloscopes and general tools. Special tools and maintenance equipment should be randomly equipped. 3.7 Requirements for parts and components
3.7.1 Optical and mechanical parts and components
Optical and mechanical parts and components should comply with the provisions of Articles 1.3 and 1.5 of GJB369 and the detailed specifications. 3.7.2 Interchangeability
The fixed parts in the product shall have good mechanical and electrical interchangeability (fine-tuning is allowed). 3.B Power supply
SJ 20703--1998
The primary power supply used by the TV seeker shall be selected according to Table 3. When the voltage and frequency of the power supply vary within the range specified in the table, its performance shall meet the requirements of 3.3.1 to 3.3.13. Its energy consumption value shall be specified by the detailed group specification. Table 3
Power supply name
AC single-phase power supply
First-class power supply
3.9 Electromagnetic compatibility
3. 9. 1 Electromagnetic emission
The electromagnetic emission intensity of the TV seeker power supply line shall not exceed the limit value specified in Figure CE102-1 of GJB151A.
3.9.2 Electromagnetic sensitivity
3.9.2.1 When the signal specified in Figure CS101-1 of GJB151A is injected into the power line of the TV seeker, the system should be able to work normally. The specific requirements are specified by the detailed specifications. 3.9.2.2 When the peak signal specified in Figure CS106-1 of GJB151A is injected into the power line of the TV seeker, the system should be able to work normally. The specific requirements are specified by the detailed specifications. 3.9.2.3 When the TV seeker is in the radiation electric field specified in Table 5 of GJB151A, it should be able to work normally. The specific requirements are specified by the detailed specifications.
3.10 Software
3.10.1 The software design should comply with the requirements of GJB437, GJB438, and GJB439. 3.10.2 The software system structure should be clear and should be able to operate reliably under the electromagnetic environment conditions on the missile. 3.11 Dimensions
The dimensions of the TV seeker shall be specified in the detailed specifications. 3.12 Quality
The quality of the TV seeker shall be specified in the detailed specifications. 3.13 Appearance Quality
3.13.1 The surface of the TV seeker shall not have defects such as corrosion, coating shedding, bubbles, cracks, mechanical damage, loose fasteners, etc.
3.13.2 The aerodynamic shape, fairing, optical window and the connection of the transition section of the TV seeker optical cabin shall be continuous and smooth, and shall not have any unevenness. The body requirements of the cabin section of the TV seeker that needs to be sealed shall be specified in the detailed specifications.
3.13.3 The signs, symbols and signs of the TV seeker shall be clear, bright, firm and the writing shall be precise. 3.13.4 The surface of the optical components of the TV guidance head should be clean and free from dust, oil, stains, fingerprints, liquid residues and other contamination.
3.14 Color
3.14.1 Product color
Product color is specified in the detailed specifications.
3.14.2 Identification color
SJ 20703--1998
3.14.2.1 The color of the conductor shall comply with the provisions of GB2681. 3.14.2.2 The characters, marks and scales on the TV guidance head shall have a clear color difference with the background color. 3.15 Signs and codes
3.15.1 The combination, independent unit and compartment of the TV guidance head shall be equipped with signs. The format and size of the signs shall be specified by the detailed specifications.
3.15.2 The switches, indicator lights, debugging potentiometers, detection holes, etc. on the product shall have signs and codes indicating their functions.
3.15.3 Socket number marks shall be set near the sockets. 3.15.4 Both ends of the connecting cable shall have marks indicating the cable number and connection relationship. 4 Quality assurance regulations
4.1 Inspection responsibilities
Unless otherwise specified in the contract or order, the contractor shall be responsible for completing all inspections specified in this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any inspection item described in the specification. 4.1.1 Responsibility for Conformity
All products must comply with all requirements of Chapters 3 and 5 of this specification. The inspections specified in this specification shall become an integral part of the contractor's inspection system or quality program. If the contract includes inspection requirements not specified in this specification, the contractor shall also ensure that the products submitted for acceptance meet the contract requirements. Quality consistency sampling does not allow the submission of products that are known to be defective, nor can the ordering party be required to accept defective products. 4.2 Inspection Classification
The inspections specified in this specification are divided into:
a. Identification inspection (type inspection):
b. Quality consistency inspection.
4.3 Test conditions
4.3.1 Standard atmospheric conditions
Unless otherwise specified, the performance test and test of the TV guidance head shall be carried out under the following standard atmospheric conditions:
Temperature: generally 15~35°C
Relative humidity: 20%80%
Atmospheric pressure: the air pressure of the test site.
SJ 20703—1998
4.3.2. Test equipment, instruments and test sites The instruments, equipment and their accuracy for testing products shall comply with the detailed specifications and shall be inspected in accordance with the metrological requirements stipulated by the state and within the valid qualified period. The requirements for the test site shall be specified by the detailed specifications. 4.4 Appraisal and inspection
Products that meet any of the following conditions shall be subject to appraisal and inspection: a.
Newly developed products:
b. When the main design and process are changed.
4.4.1 Inspection items and sequence
Unless otherwise specified, the inspection items and sequence may be carried out in accordance with the provisions of Table 4. Table 4
Inspection items
Unguided distance
Terminal guidance first control distance
Tracking angular velocity
Tracking accuracy
Probability of interception
Automatic capture capability
Image resolution
Video signal processing capability
Anti-background interference capability
White detection function
Tracking mode
Signal processing time
Temperature impact
Quality consistency inspection
Group B Group C
Chapter number
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Inspection method
Chapter number
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