1、NIL-C-4Bbb5 13 I 797770h 0322787 5 eneficiai mmments (recommendations, additions, deletions) Md any pertinent dita which may be of use ln improving this document should be ciadressed to: Commander, US Army Armament Research and Development Center, Attn: AMSMC-QA, Dover, Neu Jew 07803-5001 by udng th
2、e re-addressed Standardizath Document rnprovammt R-D6-f93 MIL-C-48665 (AR) 28 April 1986 MILITARY SPECIFICATION CORE, TOROID This specification is approved for use within the U.S. Army Armament , Mun it ions and Chemical Command , and is available for use by all Departments and Agencies of the Depar
3、tment of Defense. 1. SCOPE 1.1 Scope. This specification contain requirements not normally covered by drawings and provide quality assurance provision for the core, toroid for use on Mine, AT, in the FASCAM Systems. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards
4、. The following specifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement there
5、to, listed in the solicitation. SPEC IF IC AT IONS MILITARY MIL-A-4807 Ammunition, Standard Quality Assurance Provision, General Specification for FSC 1345 o DISTRIBUTION STATEMENT A. Approved for public release; distribution Is unlimited. AMSMC N/A THIS DOCUMENT CONTAINS 2gL PAGES. Provided by IHSN
6、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-48665 (AR) STANDARDS MILITARY MIL-STD-105 Sampling Procedures and Tables for MIL-STD-1169 Packaging, Packing and Marking for Shipment Inspection by Attributes . of Inert Ammunition Components . (Copies of specifi
7、cations, standards, drawings, publication and other Government documents required by the suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the Contracting Officer .) 2.1.2 Other Government documents, drawings, and . ublicatio
8、ns. The following other GoVernment documents, drawings, End publication form a part of this specification to the extent specified herein. Unless otherwise specified, the issues shall be those in effect on the date of the solicitation. DRAWINGS U.S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING
9、 CENTER (ARDEC) 9287094 Core, Toroid PUBLICATIONS 49 CFR 100-199 - Transportation, Parts (The Code of Federal Regulations is available from the Superintendent of Documents, US Government Printing Office, Washington, DC 20402. Orders should specify “49 CFR 100-199 (latest rev is ion) . ) 2.2 Order of
10、 precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained.
11、 3 . REQUIREMENTS 3.1 Materials. Material shall be accordance with the applicable drawings and specifications. 3.2 Components and. assemblies. The components and assemblies shall comply, with all requirgments specified on drawing 9287094 2 Provided by IHSNot for ResaleNo reproduction or networking p
12、ermitted without license from IHS-,-,-MIL-C-ibb5 13 7797906 0322973 3 M -= MIL-C-48665 (AR) and associated drawings and with all requirements specified in applicable specifications and standards. 3.3 Core requ irements. 3.3.1 Core sensitivity. With an input drive signal of 1.0 oersted zero to peak,
13、10 Hertz sine wave, at Z=O, the core shall I produce a minimum signal of 800 millivolt, O to peak. i 3.3.2 Core linearity. Core sensitivity at Z= + 0.45 oersteds shall not vary in excess of - + 11% from the core sensitivity at Z=O I oersteds. 3.4 First article inspection. When specified in the contr
14、act - or purchase order, a sample shall be subject to first article 1 . inspection in accordance with the technical provisions herein. 1 I (See 4.3) 3.5 Workmanship. The toroid core shall be fabricated, finished and tested in a thorough workmanlike manner. They shall be free of burrs, chips, sharp e
15、dges, cracks, unblended radii, . surface defect, dirt, grease, rust, corrosion and other foreign matter. The cleaning method used shall not be injurious to any part, nor shall the part be contaminated by the cleaning agents. All markings and stamping shall be neat and sharply defined. a - 4. QUALITY
16、 ASSURANCE PROVISIONS 4.1 Responsibility for inspection and standard quality assurance provisions. Unless otherwise specified herein, or in the contract, the provisions of MIL-A-48078 shall apply, and are hereby made a part of this detail specification. 4.1.1 Responsibility for compliance. All items
17、 must meet al1 requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that al
18、l products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material
19、. The absence of any 4.2 Classification of inspections. The following types of inspection shall be conducted on this item. a. First article inspection b. Quality conformance inspection 3 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ar NIL-C-4bb5
20、 13 W 7779706 0322772 5 = MIL-C-48665 (AR) 4.3 First article inspection, 4.3.1 Submission. The contractor shall submit a first icle sample as designated by the Contracting Offic I: for evaluation in accordance with provisions of 4.3.2. The first article sample shall consist of one hundred (100) toro
21、id cores. 4.3.2 Inspection to be performed. The first article parts submitted in accordance with paragraph 4.3.1, will be subjected to all the requirements of the applicable drawings, and to the inspections and tests of Table I. See also MIL-A-48078. 4.3.3 Rejection. See MIL-A-48078. If any items fa
22、ils to comply with any of the applicable requirements, the first article sample shall be rejected. 4.3.4 Requalification. The device, shall be subjected to another First Article as stipulated in the contract if: a. The manufacturing techniques or process controls which affect the form, fit, function
23、 or internal geometry of the device are revised by either the contractor or one of his sub-con tr ac tor s supplying parts or assemblies , b. c. The uses of a new sub-contractor for material, parts, d. A change occurs in devices material, performance or The relocationof his assembly facilities. or a
24、ssembly. assembly. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-e I Li1 -4 I hl . H w 4 8 t ri a MIL-C-48665 13 I 777770b 0322773 7 W o .4 O Li O E a, Li O u h rlclcu NNNW mmm mmmm mmm . e O O Ln In w O N a, u O z c O n U -4 u/ z 3c Li0 it is a
25、biquad design. 30.3 Calibration 30.3.1 Test circuit frequency calibration. The biquad filter of Figure 6 is tuned by inputting a 40 millivolt peak to peak 10 Hz ac test signal across TP3 and ground. The output voltage at TP4 is monitored. The frequency of the signal at TP4 will be the same as that o
26、f the input signal. An adjustment is made at the first stage of the filter (R7) such that a maximum voltage is attained at TP4 (the exact amplitude being of no importance). Subsequent adjustments made at R(14), and R(21) will properly tune the second and third stages of the filter to the 10 Hz input
27、 11 signal. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-48665 13- 7777906 0323000 7 = MIL-C-48665 (AR) 30.3.2 Test circuit gain calibration. Gain calibration of the filter can be accomplished by use of the circuit show in Figure 7 (Note: T
28、o use this circuit, the excitation circuit and 14 turn magnetometer must be disconnect-ed from the test circuit at TPl). The test signal of the circuit in .Figure 7 closely approximates the flyback voltage and input signal normally seen at TP1. The test signal, as -measured at TP1, shall be a 1 kilo
29、hertz, 4 volt, negative ramp with LO hertz, 20 millivolt peak to peqk modulation. For the circuit in Figure 6, the normal gain of the biquad filter is 250. R27 is adjusted so that the overall gain at TP4 is 250. That is, the output at TP4 is a 10 Hz ac signal whose peak value is 250 times the peak v
30、alue of the 10 Hz ac input signal at TP3. 30.4 Magnetic environment. The magnetic environment for the core test must be resistant to externally time varying and random magnetic signals. The probe fixture is to be located at a depth equivalent to one diameter of a suitable magnetic shield. A typical
31、implementation is shown in Figure 8. The DC bias test fields, and the i0 Hz ac drive signal field must be generated by coils within the magnetically shielded volume. All magnetic calibration measurements shall be made at the probe head for both the bias and drive signal calibration. c 40. Methods of
32、 inspection. 40.1 Test qeometry. Core orientation in the test fixture shall be as follows. The dot, which signifies the location of the weld mark, shall lie in the plane of the magnetometer coils and be placed as far away from the interconnect assembly as possible, as shown in Figure 9. This is to r
33、educe the influence of the magnetic discontinuity of the weld mark. The plane of the probe head test coils shall be perpendicular to the axis of the bias and drive coils, but offset to allow the core to be at the coils axis to reduce magnetic field strength gradients. 40.2 Core sensitivity. Core sen
34、sitivity shall be measured using the test circuit described and caX2brated. herein. The magnetometer shall be oriented as shown in Figure 9. Output at. TP4 shall meet the requirements of 3.3.1 with 2 = O. The waveform across the 14 turns (TP1 of Figure 1 and Figure 2) should be as in Figure 5. The w
35、aveform shall reach zero volts before 30 microseconds to ensure core saturation. 40.2.2 Core linearity. Core linearity shall meet the requirements of 3.3.2 using the test described in 402 except Z = t0.45, and 2 = -0.45 oersteds. 12 Provided by IHSNot for ResaleNo reproduction or networking permitte
36、d without license from IHS-,-,-MIL-C-48665 (AR) 50. NOTES 50.1 Definit ions. 50.1.1 Z. Vertical component of the earths magnetic field, as used Z is-the simulated vertical component of the earths magnetic field. Z is a fixed value that is time invariant. 50.1.2 Core sensitivity. The amount of filter
37、ed, amplified signal the core will pick up as a 14 turn magnetometer (formed when a core is placed in the test fixture which provides the magnetic environment for the test circuit of Figure 1) from the calibrated 10 hertz sinusoidal signature present in the test fixture. 50.1.3 Core linearity. The p
38、ercentage difference between the core sensitivity at O-bias (Z = O oersted) and N-bias (Z= +.450 oersted) or S-bias (2 = -.450 oersted). 50.1.4 Bias coils. The set of Helmholtz coils that provide the Dc magnetic field (Z) for determining the DC magnetic offset for the 10hz magnetic signature. 50.1.5
39、 Drive coils. A secondary set of Helmholtz coils that produces the 10 hz magnetic signature. 13 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-C-4bbS 13 W 9999906 0323002 2 W MIL-C-48665 (AR) .- . T- L w u o O E b t w 14 Provided by IHSNot for R
40、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-48bb5 13 m 779790b 0323003 4 MIL-C-48665 (AR) ai PULSE 6 t-TPi TO ENVELOPE DETECTOR Core114 Turn Magnetometer Under Test 9 FIGURE 2. EXCITATION CIRCUIT 15 Provided by IHSNot for ResaleNo reproduction or networking permit
41、ted without license from IHS-,-,-NIL-C-4bb5 13 777790b 0323004 b 9 MIL-C-48665 (AR) r. FIGURE 3. EXCITATION CURRENT WAVfFORM 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-T NIL-C-VBbb5 13 I 377730b 0323005 B TO Cor e/M ag n e t o met e r Under T
42、est MIL-6-48665 (AR) FIGURE 4. ENVELOPE DETECTOR 17 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-Ybb5 L3 W 777770b 032300b T W MIL-C-48665 (AR) O VOLTS 18 FIGURE 5. TYPICAL CORE OUTPUT AT TPf Provided by IHSNot for ResaleNo reproduction or n
43、etworking permitted without license from IHS-,-,-MIL-C-Vbb5 13 W 7777706 0323007 1 i MIL-C-48665 (AR) Detector f FIGURE 6. BIQUAD IMPLEMENTATION OF DESIRED FILTER 19 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-4bbS 13 m 9999906 0323008 3 m
44、10 HZ SINEWAVE GENERATOR - MIL-C-48665 (AR) FIGURE 7 CALIBRATION TEST CIRCUIT e 20 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c I =T - MIL-C-L+8665 23 7777706 0323007 5 MIL-C-48665 (AR) 1 21 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-qbbS 13 W 9977906 O323030 1 a MIL-C-48665 (AR) O U w 22 O I- s O F v) O e w Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
