Some standard content:
Military Standard of the Electronic Industry of the People's Republic of China FL5840
SJ20046-92
Portable non-metallic mine detectors
General specification
General spcification for portablenon-metallic mine detectors
Published on February 1, 1992
China Electronics Industry Corporation
Implemented on May 1, 1992
Military Standard of the Electronic Industry of the People's Republic of China General specification for portablenonmetallic mine detectors
Subject content and scope of application
SJ2004692
This specification specifies the basic requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements for portable non-metallic mine detectors.
This specification applies to portable non-metallic mine detectors (hereinafter referred to as mine detectors). 2 Reference standards
GB191--90
GB5080.1-86
GB5080.2—86
GB5080.4—85
GB5080.5—85
GB5080.6—85
GB5080.7-86
GB7288—87
GJB150.1—86
GJB150.386
GJB150.4—86
GJB150.5—86
GJB 150.786
GJB150.8—86
GJB 150.9--86
GJB150.10—86
GJB150.11—86
GJB:150.14-—86
GJB150.16—86
GJB150.18—86
Packaging storage and transportation pictorial signs
Equipment reliability test
General requirements
Equipment reliability test
Equipment reliability test
(Exponential distribution)
Equipment reliability test
Equipment reliability test
Equipment reliability test
Verification test plan
Test cycle design guide
Test plan for success rate of point estimation and interval estimation methods for reliability determination test
Validity test of constant failure rate assumption
Efficiency rate and mean time between failures under constant failure rate assumptionRecommended test conditions for equipment reliability testGeneral principles for environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Environmental test methods for military equipment
Published by China Electronics Industry Corporation on February 1, 1992High temperature test
Low temperature test||t t||Temperature shock test
Solar radiation test
Rain test
Wet heat test
Dancing fungus test
Salt test
Immersion test
Vibration test
Impact test
1992-05-01Implementation
GB387-87www.bzxz.net
3Terms
SJ20046—92
Terms of mine detector
Terms not defined in this specification shall be in accordance with the provisions of GJB387. 3.1 Non-metallic mine detector non-metallic mine detector A mine detector that uses radio technology to obtain mine information by utilizing the inhomogeneity of the dielectric constant of the soil where the mines are buried. 3.2 Mine detection figure The number of mines detected by the mine detector (including the positioning points within 10cm around the buried mines). 4 Product classification
4.1 Product types
According to the signal processing method, it can be divided into:
Analog circuit processing;
Analog digital circuit processing;
Microprocessor processing;
d. Others.
4.2 Product model representation method
The model representation method of the finalized mine detector is shown in Table 1. Table 1
The first letter
indicates the engineering category
The second and third letters
indicate the category characteristics
TL (mine detection equipment)
The first digit
indicates the purpose
1 (portable
mine detector)
The second digit
indicates the structural performance
2 (detecting non-
metal mines)
Example: The model of the Type 82 improved non-metallic mine detector is GTL121A. 5 Technical requirements
5.1 Performance requirements
5.1.1 Initial working state
The third digit
indicates the serial number
The last letter
indicates the improved type
When the mine detector is in the initial working state, its output signal shall comply with the provisions of the product specifications and shall be clearly different from the alarm signal.
5.1.2 Drift of the initial working state
Within 30 minutes, the output signal of the mine detector shall comply with the provisions of the product specifications. 5.1.3 Drift of solar radiation and sunshade
After the mine detector probe (hereinafter referred to as the probe) has been subjected to the test specified in Article 6.5, the output signal of the mine detector shall comply with the provisions of the product specifications.
5.1.4 Overload recovery time
The overload recovery time of the mine detector shall comply with the provisions of the product specifications. 5.1.5 Detection capability
In the field simulator, the mine detector should be able to detect GLD212 anti-tank mines and GLD111 anti-infantry mines. 2
SJ20046-92
For non-microprocessor mine detectors, the maximum distance between the probe and the soil surface is greater than or equal to 5cm. a.
b. For microprocessor mine detectors, the maximum distance between the probe and the soil surface is greater than or equal to 10cm. 5.1.6 Anti-interference capability
5.1.6.1 Anti-interference capability of foreign objects
The mine detector's suppression capability for objects such as holes, stones, tree roots, and shrapnel should comply with the provisions of the product specifications. 5.1.6.2 Anti-interference capability of hetero-frequency electromagnetic waves
The mine detector's suppression capability for hetero-frequency electromagnetic fields (field strength less than or equal to 2mV/m) outside the 20% bandwidth of the design center frequency should comply with the provisions of the product specifications. 5.1.7 Power consumption
Under the specified working voltage, the power consumption of the mine detector shall comply with the provisions of the product specifications. 5.1.8 Undervoltage alarm
When the power supply voltage of the mine detector drops to the minimum working voltage specified in the product specifications, the mine detector shall issue an undervoltage alarm signal.
5.1.9 Continuous working time
The continuous working time shall not be less than 10h.
5.1.10 Average detection rate
The average detection rate shall not be less than 85%.
5.1.11 Minimum allowable working distance
The minimum allowable working distance shall not exceed 6m.
5.1.12 Working quality
The working quality shall not exceed 3.5kg.
5.1.13 Reliability
The mean time between failures (MTBF) of the mine detector; Class A shall not be less than 1000h.
B level shall not be less than 500h.
5.2 Maintainability
5.2.1 The mine detector shall require only very simple maintenance. 5.2.2 The design, appearance and assembly of the mine detector shall take into account interchangeability. 5.3 Safety
When designing, sharp angles and convex edges shall be avoided, and fasteners shall not be too long. 5.4 Coating
The surface coating of the mine detector shall comply with the requirements of the product design documents. 5.5 Design and manufacturing requirements
The design and manufacturing requirements of a complete set of mine detectors shall comply with the requirements of this specification and product design documents. 5.6 Environmental conditions
5.6.1 Temperature
Working temperature: -40~+55℃;
Relative humidity: 5%~95%;
Storage temperature: ~55~+70℃.
5.6.2 Temperature shock
SJ20046—92
After the mine detector is subjected to the temperature shock of high temperature of +70℃ and low temperature of -55℃, it shall meet the requirements of 5.1.1, 5.1.5, 5.1.7 and 5.1.8.
5.6.3 Immersion
After the probe is subjected to the test of 6.24, the mine detector shall meet the requirements of 5.1.5. 5.6.4 Impact
After the mine detector is subjected to the test of 6.25 under the packaging condition, it shall meet the requirements of 5.1.5. 5.6.5 Vibration
After the mine detector is subjected to the test of 6.26, it shall meet the requirements of 5.1.5. 5.6.6 Rain
After the mine detector is subjected to the test of 6.27, it shall meet the requirements of 5.1.5. 5.6.6 Damp heat
After being subjected to the test in Article 6.28, the mine detector shall meet the requirements of Article 5.1.5. 5.6.8 Bacteria
After the mine detector is subjected to the test in Article 6.29, the length of the mark level shall not exceed Level 2 specified in GJB150.10. 5.6.9 Salt spray
After the mine detector is subjected to the test in Article 6.30, it shall meet the requirements of Article 5.1.5. 6 Test methods
6.1 Standard atmospheric conditions and test instruments and equipment 6.1.1 Standard atmospheric conditions for the test
Temperature: 15~35℃,
Relative humidity: 20%~80%;
Air pressure: the air pressure of the test site.
6.1.2 Test instruments and equipment
The models and performance of the instruments and equipment used in the test shall meet the requirements of the test items of this specification. 6.2 Field simulator
6.2.1 Composition
It consists of standard targets, standard background, test equipment and buried interference objects. 6.2.2 Standard Beijing
Fine loam without debris, with a humidity of 16%-20%, which should be dense and compact with a flat surface. 6.2.3 Size
Standard targets and interference objects should be more than 1 product working wavelength away from the surrounding wall. 6.2.4 Standard target
There should be at least one GLD212 anti-tank mine, and the top of the mine pressure cover should be 8cm away from the soil surface. Or there should be at least one GLD111 anti-infantry mine, and the mine rubber cover should be 2cm away from the soil surface. 6.2.5 Interference objects
The buried interference objects should be closely integrated with the soil, similar to the natural conditions in the field, and their volume and burial depth should comply with the provisions of the product specifications.
6.2.6 Electrical and mechanical properties of the field simulator The electrical and mechanical properties of the field simulator should be stable and reliable, and the pulley speed can be adjusted arbitrarily within 0.1~0.8m/s. 4
6.3 Initial working state
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The bottom surface of the probe is parallel to the soil surface of the field simulator, and the distance is in accordance with the provisions of Article 5.1.5. The mine detector is in the search state. After 5s of rest, measure its output signal. Its output signal should meet the requirements of Article 5.1.1. 6.4 Drift of the initial working state
After testing for 30mi in accordance with Article 6.3, re-measure its output signal, which should meet the requirements of Article 5.1.2. 6.5 Drift of solar radiation and sunshade
Place the mine detector in the test site and adjust it to the initial working state. The total intensity of light radiation is in accordance with the provisions of Article 2.1.1 of GJB150.7 and is perpendicular to the probe surface. Irradiation for 10 minutes and sunshade for 30 minutes is a cycle. The mine detector undergoes four consecutive cycles. Measure its output signal after each cycle. Its value should meet the requirements of Article 5.1.3. 6.6 Overload recovery time
Use any means to force the probe nozzle into the positioning state, the probe is stationary, and the recovery time should meet the requirements of Article 5.1.4. 6.7 Detection capability
The mine detector is in the search state, and the bottom surface of the probe is parallel to the soil surface of the field simulator and sweeps left and right at the distance specified in Article 5.1.5. When passing over the standard target, there should be an output signal and its output signal should meet the requirements of the product specification. 6.8 Anti-interference capability
Test according to Article 6.7, and the test results should meet the requirements of Article 5.1.6.1. 6.9 Anti-interference of electromagnetic waves of different frequencies
Test according to Article 6.7, and apply the electromagnetic field required by Article 5.1.6.2. It should meet the requirements of Article 5.1.6.2. 6.10 Power consumption
The mine detector is in the search state, the power supply voltage is the specified value, and the current value at this time is measured. Its value should meet the requirements of Article 5.1.7.
6.11 Undervoltage alarm
The power supply voltage is adjusted to the highest working voltage, the mine detector is adjusted to the initial working state, and then the power supply voltage is reduced until the undervoltage alarm signal is issued. Measure the power supply voltage value at this time, and its value should meet the requirements of Article 5.1.8. 6.12 Continuous working time
When using the internal power supply, the time interval from the start of continuous operation of the mine detector to the activation of the undervoltage alarm device should meet the requirements of Article 5.1.9.
6.13 Average detection rate
6.13.1 Minefield setting
6.13.1.1 Soil type: loam, salt-slip sand, magnetic soil. 6.13.1.2 Minefield area: 30m×2.4m. 6.13.1.3 Number of mines and requirements for burial: a. Number of mines, 30~50
Among them: GLD212 anti-tank mines account for 30% of the total number of mines; GLD111 anti-infantry mines account for 70% of the total number of mines. b. Buried depth:
The rubber cover of GLD111 anti-infantry mine is 1~2cm away from the soil surface. The pressure cover of GLD212 anti-tank mine is 6~8cm away from the soil surface. The buried distance between mines shall not be less than one product working wavelength. 6.13.1.4 Number of interference objects and burial requirements 5
The number of interference objects is 50% of the number of buried mines.
SJ20046—92
Buried requirements: It should meet natural conditions and be buried for several weeks to withstand the influence of wind and rain erosion. 6.13.1.5 Surface conditions
Sparse weeds are allowed, and it should not be damaged by human beings. 6.13.2 Mine detection operation
Three trained operators take turns to operate each mine detector, and each 20-minute detection and 3-minute rest is a working cycle. The number of mine detection fields shall not be less than 3.
6.13.3 Calculation of average detection rate
The average detection rate shall be calculated according to the provisions of the product specifications, and its value shall meet the requirements of Article 5.1.10. 6.14 Minimum operating distance
Two mine detectors of the same type are 6m apart and when working at the same time, the requirements of Article 5.1.11 shall be met. 6.15 Operating quality
The mine detector in working state shall be measured vertically in the scale, and its quality shall meet the requirements of Article 5.1.12. 6.16 Reliability
It shall be carried out in accordance with the provisions of GB5080.1~5080.2 and GB5080.4~GB5080.7 and GB7288. The test plan shall be specified by the product specification, and the test results shall meet the requirements of Article 5.1.13. The reliability failure criterion is shown in Appendix A. 6.17 Maintainability
It shall be inspected in accordance with the provisions of the product specification. The inspection results shall meet the requirements of Article 5.2. 6.18 Safety
It shall be inspected by the appearance method and shall meet the requirements of Article 5.3. 6.19 Coating
It shall be inspected in accordance with the provisions of the product specification. It shall meet the requirements of Article 5.4. 6.20 Design and manufacturing requirements
Inspect according to the provisions of the product specification and meet the requirements of Article 5.5. 6.21 Low temperature test
Perform according to the test method specified in GJB150.4. After the test, inspect according to the provisions of Articles 6.3, 6.7, 6.10 and 6.11. The results shall meet the requirements of the corresponding Articles 5.1.1, 5.1.5, 5.1.7 and 5.1.8. 6.22 High temperature test
Perform according to the test method specified in GJB150.3. After the test, inspect according to the provisions of Articles 6.3, 6.7, 6.10 and 6.11. The results shall meet the requirements of the corresponding Articles 5.1.1, 5.1.5, 5.1.7 and 5.1.8. 6.23 Temperature shock test
Perform according to the test method specified in GJB150.5. After the test, check according to the provisions of 6.3, 6.7, 6.10 and 6.11. The results should meet the requirements of 5.6.2.
6.24 Immersion test
Place the probe in water with its highest point 1m away from the water surface. The test is carried out in accordance with GJB150.14. After the test, take out the probe, wipe off the surface water, and then check according to the provisions of 6.7. The results should meet the requirements of 5.6.3. 6.25 Impact test
Carry out according to the test methods specified in Tests 1, 4 and 2 in GJB150.18. After the test, check according to the provisions of 6.7, and the results should meet the requirements of 5.1.5. 6.26 Vibration test
SJ20046--92
According to GJB150.16. The test method specified in Article 2.3.3 and Article 2.3.12 shall be followed. During the test, the mine detector shall be equipped with batteries but the switch shall not be turned on. After the test, it shall be checked in accordance with Article 6.7, and the results shall meet the requirements of Article 5.1.5. 6.27 Rain test
shall be carried out in accordance with the test method specified in Article 2.1 of GJB150.8. During the test, the probe rod of the mine detector is 45° to the ground, and the rainfall intensity is 12cm/h. After the test, it shall be checked in accordance with Article 6.7, and the results shall meet the requirements of Article 5.1.5. 6.28 Wet heat test
shall be carried out in accordance with the test method specified in GJB150.9. After the test, it shall be checked in accordance with Article 6.7. The results shall meet the requirements of Article 5.1.5.
6.29 Fungus test
shall be carried out in accordance with the test method specified in GJB150.10. After the test, the grade of the long strip shall meet the requirements of Article 5.6.8. 6.30 Salt spray test
Perform the test method specified in GJB150.11. After the test, it shall meet the requirements of Article 5.6.9. 7 Inspection rules
7.1 Inspection classification
a. Finalization inspection;
b. Acceptance inspection;
c. Routine inspection.
7.2 Finalization inspection
7.2.1 The product must pass the finalization inspection when it is finalized in design and production. 7.2.2 The number of prototypes for finalization inspection shall not be less than 3. 7.2.3 Finalization inspection items include all inspection items specified in these regulations, see Table 2 for details. 7.2.4 If a fault occurs during the inspection or a certain inspection fails, the inspection shall be interrupted. After finding out the cause, eliminating the fault and submitting a fault analysis report, the inspection shall be carried out again. If a fault recurs or a certain item fails in the subsequent inspection, the inspection shall be stopped. After the cause is found, the fault is eliminated, and a fault analysis report is submitted, the inspection shall be repeated. 7.3 Acceptance inspection
7.3.1 Products must pass acceptance inspection when they are delivered. 7.3.2 Products provided by the manufacturer to the representative of the consignor must be products that have been inspected and issued with a certificate of conformity. 7.3.3 During acceptance inspection, the representative of the ordering party shall randomly select 10% (not less than 2 units) of the products from each batch of products for inspection. If necessary, the number of inspections may be increased through negotiation between the manufacturer and the ordering party until all products are inspected. 7.3.4 The items and sequence of acceptance inspection shall be carried out in accordance with the provisions of Table 2. 7.4 Routine inspection
7.4.1 Routine inspection shall be carried out for each batch of products produced in batches. Routine inspection shall be carried out at least once a year for products produced continuously. Routine inspection shall also be carried out when production is resumed after a suspension of more than one year. Routine inspection shall be conducted when major design changes, major process changes or major components and materials are replaced. 7.4.2 Routine inspection shall be the responsibility of the quality inspection department of the production unit and shall be conducted under the supervision of the ordering party's representative, or by the unit designated by the superior competent department, and the ordering party's representative shall be invited to participate. 7.4.3 The samples for routine inspection shall be randomly selected from the products that have passed the delivery inspection, and the number shall not be less than 3. 7.4.4 The items and sequence of routine inspection shall be carried out in accordance with the provisions of Table 2. 7.4.5 If a failure or any item fails during the test, the cause shall be found out, the product shall be repaired, and the number of doubled items shall be re-inspected for the unqualified item. If it passes, it shall pass. If a failure or a certain item fails again, the cause of the failure shall be found out, the failure shall be eliminated, and a failure analysis report shall be submitted before re-conducting routine inspection. If a certain item fails again during the re-inspection, the batch of products shall fail.
Inspection items
Initial working state
Drift of initial working state
Drift of solar radiation and shading
Overload recovery time
Detection capability
Anti-interference capability
Undervoltage alarm
Continuous working time
Average detection rate
Minimum allowable working distance
Work quality
Maintainability
Safety
Temperature shock
Design and manufacturing requirements
Reliability
Testing method
Note: "\○" in the table indicates the inspection items that should be carried out in this type of inspection. 8
Type inspection
Delivery inspection||t t||Routine inspection
8 Marking, packaging, transportation and storage
8.1 Marking
SJ20046—92
The marking method shall be in accordance with the provisions of GB191. In special circumstances, marking can also be carried out according to the requirements of the ordering party. 8.1.1 The product nameplate shall have the following markings:
The name (or abbreviation) and trademark of the manufacturer; b.
The model and name of the mine detector;
The date of manufacture and serial number.
8.1.2 The surface of the mine detector packaging box shall have the following markings: a.
The name (or abbreviation) of the manufacturer;
The model and name of the mine detector:
The year and month of manufacture,
The volume, mass and number of units;||tt ||Marked with signs or words such as "afraid of moisture", "upward", "handle with care". Serial number (batch, batch number, serial number)
Under special circumstances, it can be marked according to the requirements of the ordering party. 8.2 Packaging
8.2.1 Packaging
After the qualified mine detectors are cleaned, they shall be packed together with the product certificate, spare parts list, operating and maintenance instructions, packing list, etc. in accordance with the provisions of relevant documents. During the transportation of the products, rainproof, moisture-proof and mildew-proof packaging measures shall be taken according to climatic conditions and means of transportation. 8.2.2 Lead sealing
A complete set of mine detectors shall be lead sealed when leaving the factory.
8.3 Transportation
The fully packaged mine detectors can be transported by normal land, sea and air transportation, and must be protected from direct rain and snow. Rain and mechanical damage.
8.4 Storage
The packaged mine detector packaging box should be stored in a warehouse without acid or harmful gas around. The warehouse should be well ventilated and have dust prevention measures. The storage period is 10 years. Within the specified storage period and storage conditions, the performance of the mine detector should meet the requirements of the product specifications and there should be no rust and mildew. During storage, batteries shall not be installed in the mine detector. A1 Failure Criteria
SJ20046-92
Appendix A
Reliability Failure Criteria
(Supplement)
A1.1 The drift of the initial working state exceeds the technical conditions and is considered a failure. A1.2 In the field simulator, the mine detector fails to detect mines under the specified conditions and is considered a failure. A1.3 Under the specified conditions, when the mine detector's suppression ability to objects such as holes, stones, tree roots, shrapnel, etc. exceeds the value specified in the product standard, it is considered a failure.
A1.4 If the static power consumption of the mine detector exceeds the specified value of the product three times, it will be considered as one failure. A1.5 If the mine detector cannot alarm under voltage within the specified voltage range, it will be considered as one failure. A1.6 If the continuous working time of the mine detector is less than the product standard three times, it will be considered as one failure. A1.7 If the average detection rate of the mine detector is lower than the product standard, it will be considered as one failure. A2 Calculation of failures
Independent failures are counted in the number of failures.
Dependent failures are not counted in the number of failures.
Vulnerable components are damaged after reaching the life of the component, and replacement is allowed without failure treatment. A2.4
Active fasteners are not considered as failures after being loosened during the test and tightened. A2.5
Failures caused by operating errors or improper use during the test will not be considered as failures. A2.6 In the test, three failures are considered as one failure. If the number is less than three, round it up. A3 Failure Analysis and Treatment
A3.1 When the test device fails, the test personnel shall carefully analyze the failure, check the reasons for the failure, the conditions and the relationship with other failures in detail, propose improvement measures for the design process and components based on the analysis, and immediately repair them. After the repair, the test shall continue, and the time taken for the repair shall not be included in the total cumulative test time. A3.2 During the repair, only the failed components shall be adjusted, repaired and replaced. The model and specifications of the replaced components shall comply with the requirements of the design documents, and high-end components shall not be used as substitutes. Components whose performance has degraded but has not exceeded the specified value shall not be adjusted, repaired or replaced, otherwise they will be counted in the number of failures. The failed components shall be properly preserved and handed over to relevant personnel for analysis and treatment. A3.3 If a component or part fails repeatedly, the test should be stopped immediately and effective measures must be taken until the above situation is eliminated before the test can be carried out again.
Additional Notes:
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard was drafted by the 50th Institute of the Ministry of Machinery and Electronics Industry, and the Engineering Corps of the General Staff of the Chinese People's Liberation Army participated in the drafting. The main drafters of this standard are Liu Xiuzhen, Zhang Jinbo, Zhou Zongyue, and Wang Chuanhua. Project code: B93032.
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