This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of near-infrared television cameras. This standard is only applicable to near-infrared television cameras using camera tubes. GB/T 15641-1995 General Technical Requirements for Near-Infrared Television Cameras GB/T15641-1995 Standard download decompression password: www.bzxz.net

UDC621.397.61
National Standard of the People's Republic of China
GB/T15641—1995
General specification for near infrared television cameras
Published on July 24, 1995
Implemented on March 1, 1996
Published by the State Administration of Technical Supervision
National Standard of the People's Republic of China
General specification for near infrared television cameras
1 Subject content and scope of application
GB/T15641—1995
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of near infrared television cameras. This standard is only applicable to near infrared television cameras using video tubes (hereinafter referred to as cameras). 2 Reference standards
GB191 Packaging, storage and transportation pictorial marking
GB2423.5 Basic environmental testing procedures for electric and electronic products Test Ea: Impact test method
Test Fc: Vibration (sinusoidal) test method GB2423.10 Basic environmental testing procedures for electric and electronic products GB4857.5 Packaging and transportation Package drop test method GB12322
Reliability test method for general-purpose application television equipment GB12338
GB14861
Measurement method for black and white general-purpose application television camera Safety requirements and test methods for application television equipment GB/T15466 Application television terminology
3 Terms
Except for the terms specified in this standard, other terms shall comply with the provisions of GB/T15466. 3.1 Near infrarednearinfrared
Electromagnetic waves with a wavelength of 0.76~3μm.
3.2 Infrared filter infraredfilter
An optical filter element that can separate the infrared spectrum or infrared wavelength is called an infrared filter. 3.3 Continuous working time continuousworktime refers to the continuous working time during which the camera can meet the performance indicators. 4 Technical requirements and test methods
4.1 Appearance, structure
4.1.1 Requirements
The appearance of the camera should be free of obvious mechanical damage, peeling, scratches, and rust of the coating layer. The logos and text symbols on the panel should be clear. Plastic parts should not have blistering, cracking, deformation, and overflow of injection materials. The control mechanism should be flexible and the fastening parts should not be loose. 4.1.2 Inspection method
Inspect by visual inspection and hand feel, and it should comply with the provisions of Article 4.1.1. Approved by the State Bureau of Technical Supervision on July 24, 1995 and implemented on March 1, 1996
4.2 Optoelectronic performance
4.2.1 Requirements
GB/T15641—1995
The optoelectronic performance requirements of cameras shall comply with the requirements of Table 1. Table 1
Basic parameters
Full television signal amplitude
Definition (center level)
Gray scale
Scanning frequency accuracy:
Image geometric position distortion:
Inside 80% image height circle
Outside 80% image height circle
Signal-to-noise ratio
4.2.2 Measurement method
a. Blanking level (reference level): 0,
b. Peak white level: 0.7±0.14,
c. Synchronous pulse level: -0.3±8
≥450
15625±156.25
Perform as specified in GB12338, and add an infrared filter of 0.851.8um during measurement. 4.3 Continuous working time
4.3.1 Requirements
The continuous working time of the camera should be no less than 24h. 4.3.2 Test method
Under the standard measurement conditions specified in GB12338, the camera captures a scene and is tested immediately after 24h. The camera should be able to meet the requirements of Table 1.
4.4 Safety
The safety requirements and test methods of the camera should comply with the provisions of GB14861. 4.5 Environmental adaptability
4.5.1 Temperature
4.5.1.1 Requirements
The ambient temperature of the camera is divided into three groups, see Table 2, and the selected group should be specified in the product standard; a.
Storage temperature
Limit temperature
Working temperature
Working.
-40～60
-40~60
-10~60
-40～65
-25~60
-10~50
Within the working temperature range, the optical and electrical performance of the camera shall comply with the provisions of Article 4.2.1. At the extreme temperature, the product shall be able to work according to GB/T15641-1995
The product can work means that the image of the product is clear, real and has distinct levels. Note: ① Image clarity means that the image clarity is not less than 80% of the rated value. ② Image reality means that the geometric position distortion of the image is not greater than 140% of the rated value. ③ Image distinct levels means that the gray level of the image is not less than level 5. 4.5.1.2 Test method
According to the selected temperature group, the temperature cycle timing diagram (hereinafter referred to as the timing diagram) in Figure 1 shall be followed. After the product is put on the market, it shall be operated at the following limits: 4.5.1.2.1 Benchmark working condition temperature test 1 Temperature cycle test timing chart Place the product under test in the normal working position in the test box (room), when the temperature is 20 ± 2 ° C, connect the power supply of the product under test after thermal equilibrium, and conduct the following tests: a. Test the contents specified in Article 4.2, b. Test the contents specified in Article 4.2 at the upper and lower limits of the power supply. 4.5.1.2.2 Working lower limit temperature test The power supply of the product under test is in the disconnected position, and the temperature in the test box (room) is lowered to the temperature value of the corresponding step in the timing chart at an average rate of 20 ° C / h. After 2 hours, the power supply is connected, and the test product shall meet the requirements of Article 4.5.1.1b. 4.5.1.2.3 Extreme lower limit temperature test
The power supply of the test product is in the disconnected position, and the temperature in the test box (room) is lowered to the temperature value of the corresponding step in Figure 1. After 2 hours, the power supply is turned on. The test product should meet the requirements of Article 4.5.1.1b. 4.5.1.2.4 Storage lower limit temperature test
The power supply of the test product is in the disconnected position, and the temperature in the test box (room) is lowered to the temperature value of the corresponding step in Figure 1, and maintained for 4 hours. 4.5.1.2.5 Reference working condition temperature test The temperature in the test box (room) is raised to the reference temperature at an average rate of 20℃/h. After 2 hours of thermal equilibrium, the power supply of the test product is turned on. The test product should meet the requirements of Article 4.5.1.1b. 4.5.1.2.6 Working upper limit temperature test
The tested product is powered on, and the temperature in the test box (room) is raised to the temperature value of the corresponding step in Figure 1. After 2 hours, the tested product shall comply with the provisions of Article 4.5.1.1b.
4.5.1.2.7 Extreme upper limit temperature test
GB/T15641—1995
The tested product is powered on, and the temperature in the test box (room) is raised to the temperature value of the corresponding step in Figure 1. After 2 hours, the tested product shall comply with the provisions of Article 4.5.1.1b.
4.5.1.2.8 Purchase and storage upper limit temperature test
The tested product power is disconnected, and the temperature in the test box (room) is raised to the temperature value of the corresponding step in Figure 1 and maintained for 4 hours. 4.5.1.2.9 Operating upper limit temperature operation test The power of the test product is in the disconnected position, and the temperature in the test box (room) is lowered to the temperature value of the corresponding step in Figure 1. The power is turned on and it runs for 16 hours. At 8 hours and 16 hours, the test should comply with the provisions of Article 4.5.1.1b. 4.5.1.2.10 Reference working condition temperature test The test product is still in the power-on state, and the temperature in the test box (room) is lowered to the reference temperature. After 2 hours, the contents specified in Articles 4.1.1 and 4.2.1 are tested.
4.5.2 Humidity and heat
4.5.2.1 Requirements
The environmental humidity and heat conditions of the camera are divided into three groups as shown in Table 3. The selected group should be specified in the product standard; a.
Working damp heat
Storage damp heat
75%RH(30℃)
90%RH（40℃）
80%RH（40℃)
90%RH（50℃）
Within the working damp heat range, the photoelectric performance of the camera shall comply with the provisions of Article 4.2.1. b.
4.5.2.2 Test method
According to the selected damp heat group, the damp heat cycle test timing diagram shown in Figure 2 shall be followed. (
Miscellaneous vehicle matching
21 c1)
Wet heat cycle test timing chart
90%RH(50℃)
90%RH(60℃)
til chi
Comparison standard 1. Working system
FI time:ht
4.5.2.2.1 Reference working conditions Wet heat test GB/T15641—1995
Under the conditions of temperature 20±5℃ and relative humidity 50%RH. Power on the test product placed in the normal position in the test box (room), and conduct the following tests:
a. Test the contents of Article 4.2;
b. Test the contents specified in Article 4.2 at the upper and lower limits of the power supply. 4.5.2.2.2 Working damp heat test
The product under test is still powered on. The temperature and humidity in the test box (room) are raised to the values ​​of the corresponding steps in Figure 2. After 12 hours (24 hours), the content of 4.2.1 is tested. 4.5.2.2.3 Storage damp heat test
The power switch of the product under test is turned on, but it is not powered on. The temperature and humidity in the test box (room) are raised to the values ​​of the corresponding steps in Figure 2. After 24 hours (48 hours) of storage, the dielectric strength specified in 4.4 and the insulation resistance under damp heat conditions are immediately tested.
4.5.2.2.4 Reference condition damp heat test
The product under test is still powered on. The temperature and humidity in the test box (room) are lowered to the reference working conditions. After 2 hours of recovery, the contents of 4.1.1, 4.2.1, dielectric strength and insulation resistance under damp heat conditions are tested. 4.5.3 Vibration
4.5.3.1 Requirements
Unpackaged test products shall be able to withstand vertical vibration with a vibration amplitude (peak value) of 0.15mm, a sweep frequency range of 5~35~5Hz, a sweep frequency rate less than or equal to 1oct/min, and a duration of 5min. 4.5.3.2 Test method
The vibration test method shall be carried out in accordance with the provisions of GB2423.10. After the test, the camera shall comply with the provisions of Articles 4.1.1 and 4.2.1.
4.5.4 Vertical impact drop
4.5.4.1 Requirements
Packaged test products shall be able to withstand a vertical impact drop test with a drop height of 800mm and a drop number of one drop on each of the specified test surfaces. The drop surface shall be specified in the product standard. 4.5.4.2 Test method
The vertical impact drop test method shall be carried out in accordance with the provisions of Article 3.5.2.1 of GB4857.5. After the test, the camera shall comply with the provisions of Articles 4.1.1 and 4.2.1.
4.5.5 Shock
4.5.5.1 Requirements
The unpackaged test product shall be able to withstand an acceleration of 150m/s2, three consecutive shocks in the specified direction, a pulse duration of 11ms, and a shock pulse waveform of a half-sine wave. The shock direction shall be specified in the product standard. 4.5.5.2 Test method
The impact test method shall be carried out in accordance with the provisions of GB2423.5. After the test, the camera shall comply with the provisions of Articles 4.1.1 and 4.2.1.
4.6 Reliability
4.6.1 Requirements
The lower limit value (9) of the mean time between failures (MTBF) of the camera shall not be less than 1000h. 4.6.2 Test method
The test method for camera reliability shall be carried out in accordance with the provisions of this standard and GB12322. 4.6.2.1 Test plan
The test plan shall be carried out in accordance with the "Timed Truncation Test Plan 4" in Table 1 of GB12322, and the number of test samples shall be selected in accordance with the provisions of Table 4 of GB123225
.
4.6.2.2 Test conditions and test cycle
GB/T15641—1995
The test conditions and test cycle shall comply with the provisions of Chapter 6 of GB12322. Thermal stress shall be specified in the product standard. 4.6.2.3 Failure criteria
4.6.2.3.1 Fatal failure
The camera housing is electrified;
The camera has open flames.
4.6.2.3.2 Serious failure
The camera has no video output;
The image clarity (center level) is lower than 80% of the product standard rated value; the image geometric position distortion is greater than 140% of the product standard rated value and the grayscale is inferior to level 5.
4.6.2.3.3 Minor failure
The video output amplitude exceeds the rated value by ±40%; the fuse is burned, the indicator light is not on, etc.
5 Inspection rules
5.1 Inspection classification
The inspections specified in this standard are divided into finalization inspections (design finalization inspections, production finalization inspections), acceptance inspections and routine inspections. 5.2 Finalization test
5.2.1 Finalization test items, requirements and methods The finalization test items, requirements and methods are shown in Table 4. Table 4
Appearance, structure
Optoelectronic performance
Continuous working time
Environmental adaptability
Reliability
According to the provisions of Article 4.4
According to the provisions of Article 4.5
According to the provisions of Article 4.6
Testing methods
For products with different specifications, different shapes and added functions derived from the designed finalized products, the design and production can be finalized at one time under the premise of ensuring quality, and the test items with constant stress can be simplified. 5.2.2 Sampling and quantity of finalization test samples Samples for finalization test should be randomly selected from the finalized batch products. The number of samples for each test group of the finalization inspection is shown in Table 5.6
5.2.3 Inspection procedures
GB/T15641—1995
Appearance and structure inspection
Measurement of photoelectric performance parameters
Continuous working time test
Safety test
Environmental adaptability test
Reliability test
The procedures for finalization inspection shall be carried out as follows. a.
Randomly select samples from the batch of products for finalization inspection; appearance and structure inspection;
Measurement of photoelectric performance;
Continuous working time test,
Safety test;
Environmental adaptability test;
Reliability test.
5.2.4 Determination of finalization test results
Number of samples (sets)
Should comply with the provisions of Article 4.6 of this standard
In the design finalization test, if there are unqualified items, the reasons should be found out in time and measures should be taken. And re-test the item and related items until they are qualified.
In the production finalization test, if there are unqualified items, they should be re-submitted for inspection. If unqualified items still appear, the production finalization is judged to be unqualified.
Delivery inspection
Delivery inspection shall be carried out by the quality inspection and supervision department of the manufacturer. The ordering party may send representatives to participate, and the results will be used as the basis for determining whether the product can be shipped.
5.3.1 Inspection items, requirements and methods
5.3.1.1 Unpacking inspection
The inspection contents are shown in Table 6.
5.3.1.2 Photoelectric performance inspection
Packaging inspection
Appearance inspection
Inspection contents
a. Other models of products are missing or wrongly packed in the packaging box; b. Lack of certificate of conformity, instruction manual, packing list or other accessories; C. The manufacturer's name, product model, name, trademark, manufacturing date, serial number, product standard number, production license number, etc. are missing on the product.
d. The product is seriously cracked or deformed;
e. The coating is peeled off, rusted, and the plastic parts are bubbling; f. The filling material overflows;
g. The panel marking is unclear;
h. The fastening screws are loose and the control mechanism is not active; 1. The product has obvious scratches and damage.
GB/T15641—1995
The inspection contents of photoelectric performance are shown in Table 1, and the measurement methods are shown in Article 4.2.2. 5.3.1.3 Continuous working time test
The continuous working time test shall be carried out in accordance with the provisions of Article 4.3 of this standard. 5.3.1.4 Safety test
The content and method of the safety test shall be carried out in accordance with the relevant provisions of GB14861. 5.3.2 Sample Sampling
Generally, all products should be inspected for delivery inspection. bzxz.net
5.3.3 Inspection Procedure
The inspection procedure includes unpacking inspection, photoelectric performance measurement, continuous working time test and safety test. 5.3.4 Determination of Inspection Result
All inspection items in delivery inspection should be qualified. In case of unqualified items, the reasons should be found out and measures should be taken until the products are qualified. 5.4 Routine Inspection
Routine inspection should be carried out in qualified laboratories. 5.4.1 Items, requirements and methods of routine inspection The items, requirements and methods of routine inspection are shown in Table 45.4.2 Sample Sampling
Two samples for routine inspection should be randomly selected from the qualified products of delivery inspection (the number of samples for reliability test shall be in accordance with the provisions of Article 4.6 of this standard). First, they should be inspected according to the items specified in Article 5.3.1 of this standard. If unqualified products are found, they should be replaced with qualified products randomly selected. At the same time, the reasons are analyzed and written into the routine inspection report, but they are not used as the judgment basis for the routine inspection results. 5.4.3 Inspection procedure
The routine inspection procedure shall be carried out in accordance with the provisions of Article 5.2.3 of this standard. 5.4.4 Inspection cycle
For products produced in isolated batches, routine inspection shall be carried out for each batch. For products produced in continuous batches, routine inspection shall be carried out once a year. When there are major changes in design, process, materials, etc., routine inspection shall also be carried out. 5.4.5 Determination of inspection results
If all routine inspection items are qualified, the routine inspection of the batch of products shall be judged to be qualified. When a fault or unqualified item occurs in the routine inspection, the cause shall be analyzed immediately, the fault shall be eliminated, and the number of unqualified items shall be doubled for testing. After passing, the remaining items shall be carried out. If the item is still found to be unqualified in the doubled test, the test shall be stopped and the routine inspection of the batch of products shall be judged to be unqualified. At this time, the cause shall be found out and measures shall be taken to completely eliminate the unqualified factors until the routine inspection is passed. At the same time, corresponding measures shall be taken for all products in the batch. 5.4.6 Handling of samples
Samples that have undergone routine inspection cannot be shipped as qualified products. 6 Marking, packaging, transportation and storage
6.1 Marking
There should be eye-catching, neat, sun-proof and rain-proof product markings and packaging storage and transportation markings. 6.1.1 Product markings
Manufacturer name;
Product model, name, production license number; b.
Trademark,
Manufacturing date, number (or production batch number); product standard number.
Packaging markings
GB/T15641—1995
The packaging storage and transportation pictorial markings should comply with the provisions of GB191. Handle with care;
b. Afraid of moisture,
Upward,
dMass, kg,
Volume, cm.
6.2 Packaging
The product should be placed in a shockproof cushioned box, which should be accompanied by a product certificate, packing list, product technical instructions, accessories, etc.
6.3 Transportation
The packaged product should be placed in the correct position shown in the box on a commonly used means of transportation for transportation, but should avoid mechanical collision and direct exposure to rain and snow.
6.4 Storage
The packaged product should be stored in a warehouse with an ambient temperature of -10 to 40°C and a relative humidity of 50% to 80%. The warehouse should be ventilated and free of acidic, alkaline or other corrosive gases, and without strong mechanical vibration. Under this condition, the storage period is one year (the product should be powered on at least once every six months).
Additional Notes:
This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by the 55th Nanjing Institute of the Ministry of Electronics. The main drafters of this standard are Yu Hanping, Zhu Shengliang and Xi Shucun.
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