? 01红外光电管
今天（2020-10-12 14:13:59收到 。红外光电传感器原本是 根据博文 中介方法，对γ光电传感器进行射线检测。
1.基本信息
▲ BPW34F红外光电传感器
显示他的感光范围为红外(780nm - 1100nm），感光灵敏度参数如下：
▲ BPW34F灵敏度
以下是对光电管的初步测试：
- 反向电容与电压的关系；
- 正反伏安特性；
- 感光特性测试初步；
2.封装
(1) 根据端口电压
(2) 管脚标志
光电二极管脚有阴极标志。如下图所示：
▲ BPW34F正负极性标记
▲ 光电二级极性
? 02初步测试特征
1.反向电容电压关系
▲ BPW34F结电容与反向电压在数据手册中的关系
(1) 测量方法
以下用于测量电容LC100-A电感、电容测量模块。
▲ 测量电容的
(2) 测量数据
在未遮光状态下，电容约为128.6pF。电容在阴影下约80pF。
▲ 结电容与电压的关系
使用对数电压表绘制曲线时，可以比较前面数据手册中的电容电压关系，看到它们相似。
▲ 使用LOG电压标尺显示曲线
v=[0.00,0.12,0.24,0.37,0.49,0.61,0.73,0.86,0.98,1.10,1.22,1.35,1.47,1.59,1.71,1.84,1.96,2.08,2.20,2.33,2.45,2.5,2.69,2.82,2.94,3.06,3.18,3.31,3.43,3.55,3.67,3.80,3.92,4.04,4.16,4.29,4.41,4.53,4.65,4.78,4.90,5.02,5.14,5.27,5.39,5.51,5.63,5.76,5.88,6.00]
c=[76.13,66.30,62.33,56.48,53.45,51.12,49.21,48.13,46.34,45.17,45.15,43.68,42.78,41.76,41.14,40.54,40.02,39.69,39.05,38.63,38.26,37.85,37.50,37.16,36.86,36.54,36.53,36.19,35.77,35.59,35.32,35.14,34.90,34.75,34.54,34.31,34.29,34.00,33.84,33.68,33.52,33.55,33.26,33.12,32.99,32.94,32.74,32.63,32.63,32.44]
(3) 结果分析
通过测量结果来看，在输出电压在6V的时候，电容大约为32.44pF，这个数值比起数据手册中的电压对应的结电容显得大了一些。
2.VA特性
#!/usr/local/bin/python
# -*- coding: gbk -*-
#============================================================
# TEST2.PY -- by Dr. ZhuoQing 2020-10-12
#
# Note:
#============================================================
from headm import *
from tsmodule.tsstm32 import *
from tsmodule.tsvisa import *
dp1308open(110)
setv = linspace(0, 5, 50)
cdim = []
vdim = []
for v in setv:
dp1308p6v(v)
time.sleep(1)
meter = meterval()
c = meter[0] / 10 # unit mA
v = meter[2]
cdim.append(c)
vdim.append(v)
printff(v, c)
tspsave('avdata1', v=vdim, c=cdim)
plt.plot(vdim, cdim)
plt.xlabel("Voltage(V)")
plt.ylabel("Current(mA)")
plt.grid(True)
plt.tight_layout()
plt.show()
#------------------------------------------------------------
# END OF FILE : TEST2.PY
#============================================================
(1) 正向VA特性
v=[0.001,0.102,0.197,0.254,0.281,0.298,0.311,0.321,0.329,0.337,0.343,0.348,0.354,0.358,0.363,0.367,0.370,0.374,0.377,0.381,0.384,0.386,0.389,0.392,0.394,0.397,0.399,0.401,0.404,0.406,0.408,0.410,0.412,0.414,0.416,0.417,0.419,0.421,0.423,0.424,0.426,0.427,0.429,0.430,0.432,0.433,0.435,0.436,0.438,0.439]
c=[-0.000,0.000,0.001,0.005,0.013,0.021,0.030,0.039,0.049,0.058,0.068,0.077,0.087,0.097,0.107,0.116,0.126,0.136,0.146,0.156,0.166,0.176,0.186,0.196,0.205,0.215,0.225,0.235,0.245,0.255,0.265,0.275,0.285,0.295,0.305,0.315,0.325,0.336,0.346,0.356,0.366,0.376,0.386,0.396,0.406,0.416,0.426,0.436,0.446,0.456]
▲ 正向VA特性
(2) 反向VA特性
v=[0.001,0.102,0.204,0.306,0.408,0.509,0.611,0.713,0.815,0.916,1.018,1.120,1.222,1.325,1.427,1.528,1.630,1.732,1.834,1.935,2.037,2.139,2.241,2.344,2.444,2.546,2.648,2.749,2.851,2.953,3.055,3.157,3.258,3.360,3.462,3.564,3.666,3.768,3.871,3.972,4.074,4.176,4.277,4.379,4.481,4.583,4.685,4.787,4.889,4.991]
c=[0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001,0.001]
▲ 反向VA特性
3.感光测量
(1) 测量方案
使用一个红外LED针对这光电二极管BPW34F，测量BPW34F反向电流。
在BPW34F施加反向电压+5V，使用R1:10k电阻测量输出电流 I o u t I_{out} Iout。 通过采集R2:1k上的电压，可以测量到IRLED的工作电流 I i n I_{in} Iin.
▲ 测量电路
(2) 测量结果
In=[-0.000,-0.000,-0.000,-0.000,-0.000,-0.000,-0.000,0.000,0.003,0.021,0.070,0.141,0.224,0.312,0.402,0.495,0.591,0.686,0.782,0.879,0.977,1.075,1.173,1.271,1.369,1.468,1.569,1.668,1.767,1.866,1.966,2.066,2.166,2.267,2.365,2.467,2.567,2.667,2.767,2.869,2.969,3.069,3.170,3.270,3.370,3.471,3.571,3.672,3.774,3.874]
Out=[0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.001,0.001,0.002,0.003,0.004,0.005,0.007,0.008,0.010,0.011,0.013,0.015,0.016,0.018,0.020,0.022,0.024,0.026,0.028,0.031,0.033,0.035,0.037,0.039,0.042,0.044,0.046,0.049,0.051,0.054,0.056,0.059,0.061,0.064,0.066,0.069,0.071,0.074,0.076]
▲ 红外LED电流与BPW34F的反相电流
#!/usr/local/bin/python
# -*- coding: gbk -*-
#============================================================
# MEAS2.PY -- by Dr. ZhuoQing 2020-10-12
#
# Note:
#============================================================
from headm import *
from tsmodule.tsstm32 import *
from tsmodule.tsvisa import *
dp1308open(110)
setv = linspace(0, 5, 50)
Idim = []
Odim = []
for v in setv:
dp1308p25v(v)
time.sleep(1)
meter = meterval()
In = meter[2]
Out = meter[0] / 10
Idim.append(In)
Odim.append(Out)
printff(v, In, Out)
tspsave('measdata', In=Idim, Out=Odim)
plt.plot(Idim, Odim)
plt.xlabel("Input(mA)")
plt.ylabel("Output(mA)")
plt.grid(True)
plt.tight_layout()
plt.show()
#------------------------------------------------------------
# END OF FILE : MEAS2.PY
#============================================================
通过上面测量结果可以看到，它的变化规律与 中测量红色LED相似。 与 测试的红外LED发光强度是一致的。
4.动态特性
使用信号源发送方波驱动IRLED发光，测量BPW34F的输出电流波形。测量电路和前面前面感光测量方案是一样的。
下面是测量的输入IRLED驱动电压（青色）与BPW34F输出电流（蓝色）信号波形。
可以看到在这种情况下，信号上升沿和下降沿大约为2us。
▲ 驱动IRLED电压与光电二极管输出电流
将R1由原来的10k下盖为1k，输出特性上升时间和下降时间降低了大约1倍。
▲ 下拉电阻为1k时输出波形
注意：在BPW34F中对于上升时间和下降时间特性如下：
▲ 动态特性
➤ ※ 总结
对于购买到的BPW34F红外光电管的特性进行测量，初步获得它的基本特性：
- 结电容与反向电压之间的关系；这个关系与在 用于粒子检测所使用到的BPX61，BPW31基本一致，他们都属于结电容很小的光电管。
- 它的VA特性与普通的二极管类似；
- 通过IRLED可以测量到它能够对红外光有很好的感光特性；
- 它的动态特性通过施加方波LED可以测量到。但是与数据手册中所表明的0.02us的时间常数还是有很大的区别的。
- TB(￥8.75）购买到的BPWS34F
- DIY一个粒子检测器 2020-10
- 怎么DIY一个粒子检测器
- BPW34F数据手册
- 测量几个光电传感器反向电容
- LED亮度与电流之间的关系？
- SP-45ML光电二极管放大电路设计