Method of Calibrating Target Distance Using Dual Zone-block Light Screen Velocity Measuring Device

Firing sequence	$v_{23}$ /（m·s^-1）	$t_{G H}$ /μs	$t_{H K}$ /μs	$S_{G H 1}$ /mm	$S_{H K 1}$ /mm
Average value				74.88	74.87
1	117.13	638.6	638.6	74.80	74.80
2	154.60	485.6	483.6	75.07	74.76
3	164.91	454.0	454.0	74.87	74.87
4	169.84	440.8	441.6	74.86	75.00
5	166.29	449.8	450.6	74.80	74.93

Table 2. Results of velocity measurement used single zone-block calibration method

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Table 2. Results of velocity measurement used single zone-block calibration method

Firing sequence	$v_{23}$ /（m·s^-1）	$v_{G K 1}$ /（m·s^-1）	$Δ v_{G K 1}$ /（m·s^-1）	$δ v_{G K 1}$ /（‰）
Average value			0.22	1.55
1	117.13	117.02	0.11	0.95
2	154.60	154.24	0.36	2.31
3	164.91	164.69	0.22	1.31
4	169.84	169.58	0.25	1.50
5	166.29	166.01	0.28	1.69

Table 3. Times value sequence of projectile pass through screen

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Table 3. Times value sequence of projectile pass through screen

Firing sequence	$t_{12}$ /μs	$t_{34}$ /μs	$t_{1 G}$ /μs	$t_{1 H}$ /μs	$t_{G H}^{'}$ /μs	$t_{H K}^{'}$ /μs
1	862 2	881 6	153 23	158 52	528.6	528.6
2	127 79	130 44	227 05	234 88	782.4	782.6
3	883 9	903 5	157 06	162 49	541.6	541.8
4	100 14	102 28	177 95	184 09	613.4	613.6
5	808 9	826 9	143 76	148 71	495.8	496.0

Table 4. Results of calibration by dual zone-block device
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Table 4. Results of calibration by dual zone-block device
Firing sequence $S_{G H 2}$ /mm $S_{H K 2}$ /mm $Δ S_{1}$ /mm $Δ S_{2}$ /mm
Average value 74.98 74.98 0.06 0.06
1 75.00 74.96 0.06 0.06
2 74.97 75.01 0.05 0.05
3 74.97 74.96 0.06 0.06
4 74.98 74.97 0.06 0.06
5 74.99 74.99 0.06 0.06

Table 5. Results of velocity measurement used dual zone-block calibration method

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Table 5. Results of velocity measurement used dual zone-block calibration method

Firing sequence	$v_{23}$ /（m·s^-1）	$v_{G K 2}$ /（m·s^-1）	$Δ v_{G K 2}$ /（m·s^-1）	$δ v_{G K 2}$ /（‰）
Average value			0.05	0.37
1	117.13	117.21	0.08	0.66
2	154.60	154.49	0.11	0.70
3	164.91	164.96	0.05	0.30
4	169.84	169.86	0.02	0.12
5	166.29	166.28	0.01	0.07

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Jing LI, Zhonghui SUN, Jinping NI, Hui TIAN. Method of Calibrating Target Distance Using Dual Zone-block Light Screen Velocity Measuring Device[J]. Acta Photonica Sinica, 2024, 53(2): 0212004

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