【正文】 在載頻的高端時(shí)（），上邊頻與下邊頻周期差僅為3uS，這個(gè)差值決定了很難再用原來的CPU的計(jì)數(shù)分辨率方法來區(qū)分上、下邊頻，也無法判斷低頻信息。不同的信號(hào)機(jī)主燈絲斷絲接入的測(cè)試電阻不同，故分壓亦不同，采集機(jī)判別電壓數(shù)值不同，從而確定哪架信號(hào)機(jī)主燈絲斷絲。電路示意圖如下：二. 各站熔絲報(bào)警電路設(shè)計(jì)結(jié)構(gòu)不同，共有5種表現(xiàn)形式：電路電源為直流12V；電路電源為直流24V；電路電源為直流50V；公共電源線為正；公共電源線為負(fù)。特殊情況下，當(dāng)某個(gè)站被測(cè)電纜絕緣路數(shù)大于768路時(shí)，應(yīng)通知設(shè)計(jì)、工廠增加容量或增加一臺(tái)采集機(jī)。 500V 模數(shù)轉(zhuǎn)換電纜絕緣采樣 高阻放大被測(cè)電纜芯線繼電器接點(diǎn)網(wǎng)絡(luò)限幅 模數(shù)轉(zhuǎn)換 整流放大 阻抗變換 漏流采樣一. 測(cè)試原理：將特制的500V直流高壓加至電纜芯線上，把電纜芯線全程對(duì)地絕緣電阻Rx接入測(cè)試回路（安裝在E10的電纜絕緣測(cè)試電路），和回路內(nèi)取樣電阻串聯(lián)，從取樣電阻上獲得取樣電壓。J6 ——（有380電源時(shí)）掉電、相序、缺相 測(cè)試轉(zhuǎn)換單元。綜合采集機(jī)CPU按高速掃描方式監(jiān)測(cè)開關(guān)量的狀態(tài)變化，當(dāng)開關(guān)量消失或低電平持續(xù)時(shí)間超過140mS，規(guī)定輸入電源為斷電狀態(tài)，以描點(diǎn)的方式記錄斷電過程。4. 監(jiān)測(cè)相應(yīng)的道岔定位/反位表示燈和1DQJ、2DQJ狀態(tài)，邏輯判別道岔的動(dòng)作位置和道岔動(dòng)作狀況，在確認(rèn)道岔轉(zhuǎn)變到位后停止A/D采樣。如下圖所示。五. 鎖閉繼電器SJ第8組接點(diǎn)動(dòng)態(tài)檢測(cè) （違章封連報(bào)警）在排列進(jìn)路后，道岔是否確實(shí)鎖閉，是一個(gè)有關(guān)行車安全的重大問題。無奈，只好利用光電原理監(jiān)測(cè)繼電器的銜鐵位置，既不影響繼電電路的正常工作，又達(dá)到采集2DQJ繼電器位置狀態(tài)的目的。其二：利用電氣集中控制電源的電流必須是受限制的，以避免產(chǎn)生有害影響。A、B、C三相動(dòng)作線分別對(duì)應(yīng)穿入3個(gè)孔。其主程序流程圖如下。1. 電源板DY：提供獨(dú)立的穩(wěn)定的工作電源。
1= SFBDL, 0, 128, 0, 19,
2= SJBDU, 1, 128, 0, 19,
3= SJBDH, 2, 128, 0, 19,
4= SJBDL, 3, 128, 0, 19,
5= SFBDU, 4, 128, 0, 19,
6= SFBDH, 5, 128, 0, 19,
7= SNFBDL, 6, 128, 0, 19,
8= SNJBDU, 7, 128, 0, 19,
9= SNJBDH, 8, 128, 0, 19,
10= SNJBDL, 9, 128, 0, 19,
11= SNFBDU, 10, 128, 0, 19,
12= SNFBDH, 11, 128, 0, 19,
13= SJGH, 12, 01, 0, 19,
14= STAL, 13, 03, 0, 19,STAJ
15= SYAB, 14, 00, 0, 19,
16= IIBGH, 15, 01, 0, 19,
17= IIBGB, 16, 128, 0, 19,
18= SLAL, 17, 03, 0, 19,SLAJ
19= D2AB, 18, 03, 0, 19,D2AJ
20= D2B, 19, 02, 0, 19,
21= SL, 20, 02, 0, 19,
22= SYXB, 21, 02, 0, 19,
23= SNJGH, 22, 01, 0, 19,
24= SNTAL, 23, 03, 0, 19,SNTAJ
25= SNYAB, 24, 00, 0, 19,
26= SNLAL, 25, 03, 0, 19,SNLAJ
27= XDZAB, 26, 03, 0, 19,XDZAJ
28= SNL, 27, 02, 0, 19,
29= SNYXB, 28, 02, 0, 19,
30= 2QB, 29, 128, 0, 19,
31= 2QH, 30, 01, 0, 19,
32= 4QB, 31, 128, 0, 19,
33= 4QH, 32, 01, 0, 19,
34= 6QB, 33, 128, 0, 19,
35= 6QH, 34, 01, 0, 19,
36= D4AB, 35, 03, 0, 19,D4AJ
37= D4B, 36, 02, 0, 19,
38= 8QB, 37, 128, 0, 19,
39= 8QH, 38, 01, 0, 19,
40= D6AB, 39, 03, 0, 19,D6AJ
41= D6B, 40, 02, 0, 19,
42= SIILAL, 41, 03, 0, 19,SIILAJ
43= SIIDAB, 42, 03, 0, 19,SIIDAJ
44= SIIB, 43, 02, 0, 19,
45= SIIL, 44, 02, 0, 19,
46= SILAL, 45, 03, 0, 19,SILAJ
47= SIDAB, 46, 03, 0, 19,SIDAJ
48= SIB, 47, 02, 0, 19,
49= SIL, 48, 02, 0, 19,
50= S3LAL, 49, 03, 0, 19,S3LAJ
51= S3DAB, 50, 03, 0, 19,S3DAJ
52= S3B, 51, 02, 0, 19,
53= S3L, 52, 02, 0, 19,
54= S5LAL, 53, 03, 0, 19,S5LAJ
55= S5DAB, 54, 03, 0, 19,S5DAJ
56= S5B, 55, 02, 0, 19,
57= S5L, 56, 02, 0, 19,
58= 11QB, 57, 128, 0, 19,
59= 11QH, 58, 01, 0, 19,
60= D7AB, 59, 03, 0, 19,D7AJ
61= D7B, 60, 02, 0, 19,
62= 7QB, 61, 128, 0, 19,
63= 7QH, 62, 01, 0, 19,
64= D5AB, 63, 03, 0, 19,D5AJ
65= D5B, 64, 02, 0, 19,
66= 5QB, 65, 128, 0, 19,
67= 5QH, 66, 01, 0, 19,
68= XFBDL, 67, 128, 0, 19,
69= XJBDU, 68, 128, 0, 19,
70= XJBDH, 69, 128, 0, 19,
71= XJBDL, 70, 128, 0, 19,
72= XFBDU, 71, 128, 0, 19,
73= XFBDH, 72, 128, 0, 19,
74= X4LAL, 73, 03, 0, 19,X4LAJ
75= X4DAB, 74, 03, 0, 19,X4DAJ
76= X4B, 75, 02, 0, 19,
77= X4L, 76, 02, 0, 19,
78= IGH, 77, 01, 0, 19,
79= IGB, 78, 128, 0, 19,
80= IIGH, 79, 01, 0, 19,
81= IIGB, 80, 128, 0, 19,
82= 3GH, 81, 01, 0, 19,
83= 3GB, 82, 128, 0, 19,
84= 4GH, 83, 01, 0, 19,
85= 4GB, 84, 128, 0, 19,
86= 5GH, 85, 01, 0, 19,
87= 5GB, 86, 128, 0, 19,
88= 16/18GB, 87, 128, 0, 19,
89= 16/18GH, 88, 01, 0, 19,
90= D10GH, 89, 01, 0, 19,
91= D14GH, 90, 01, 0, 19,
92= SZRH, 91, 00, 0, 19,
93= SZQH, 92, 03, 0, 19,SZQJ
94= SPLH, 93, 128, 0, 19,
95= SZDL, 94, 128, 0, 19,
96= SZFU, 95, 128, 0, 19,
97=