基于C语言实现信号失真度测量源码+方案报告.zip

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基于C语言实现信号失真度测量源码+方案报告.zip 一、系统方案设计与论证 1.方案分析与选择 1）自动增益控制（AGC）电路设计方案基于 VCA821 的 AGC 电路。VCA821 是一款直流耦合、宽带、dB线性的压控增益放大器。VCA821 之后增加OPA695作为后级放大，输出信号再经过OPA820积分器，连接至 VCA821的VG引脚形成闭环，从而保证输出信号的稳定性。该方案的优点是原理清晰，且输入信号电压范围广、频率响应好、输出电压稳定性好，缺点是电路较为复杂 2）ADC 前端调理电路设计方案采用同相加法器，对 AGC 电路输出信号跟随后进行抬升 1.65V，同相放大器输入阻抗高，对前级影响小。 3）信号采样设计方案利用stm32顺序采样。顺序采样方式主要用于数字示波器中，这种方式能以极低的采样速率（100 kHz ~200kHz）获得极高的带宽（高达 50GHz），并且垂直分辨率一般都在 10bit 以上。由于在每个采样周期只取波形上的一个样点，每次延迟一个已知的时间，因此采集足够多的样点，需要更长的时间。该方案的优点是可以使用较小的采样频率采集频率较高的信号，缺点是测量一次所花时间较长。 2.总体方案描述本系统采用AGC电路对输入周期信号进行前级处理，结合ADC前端调理电路，将信号变换至ADC采集范围内，采用单片机的内部ADC 对输出信号进行采样，经FFT 算法分析得到基波与谐波的归一化幅值，运算处理得到 THD，并在串口屏上进行显示。四、测试方案与测试结果 1. 信号失真度 THD 测量 | 基频/khz|峰峰值/mv|实际THD |测试THD| |:--------:| :---------:|:--------:|:--------:| | 1kHz | 500mv |40%|40%| | 37kHz | 500mv |40%|41%| | 10kHz | 500mv |40%|40%| | 89kHz | 500mv |40%|41%| | 250kHz | 500mv |40%|40%| | 1kHz | 15mv |40%|40%| | 1kHz | 7mv |40%|41%| | 1kHz | 2mv |90%|92%| 2. 数据显示测试 | 测量信息显示设备 |失真度测量值THD|归一化幅值 |一个周期波形| |:--------:| :---------:|:--------:|:--------:| | 串口屏 | 正常 |正常|正常| 五、总结本系统通过理论分析得到合理的方案，以 STM32和ESP32为控制核心，结合基于VCA821的 AGC电路和ADC前端调理电路，设计并实现了信号失真度测量装置，完成了对输入周期信号的总谐波失真度和归一化幅值的测量与显示，且各项指标均满足设计要求

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基于C语言实现信号失真度测量源码+方案报告.zip （2000个子文件）

libdriver.a 5.77MB

libwpa_supplicant.a 4.23MB

libmbedcrypto.a 3.94MB

liblwip.a 3.02MB

libhal.a 1.57MB

libnvs_flash.a 1.35MB

libmbedtls.a 1.06MB

libfreertos.a 870KB

libesp_hw_support.a 823KB

libesp_system.a 783KB

libconsole.a 736KB

libspiffs.a 722KB

libspi_flash.a 708KB

libprotocomm.a 605KB

libwifi_provisioning.a 589KB

libesp_eth.a 581KB

libvfs.a 572KB

libfatfs.a 569KB

libmbedx509.a 557KB

libbootloader_support.a 445KB

libprotobuf-c.a 427KB

libheap.a 415KB

libesp_lcd.a 400KB

libsdmmc.a 399KB

libesp_netif.a 398KB

libesp_http_server.a 386KB

libmqtt.a 380KB

libjson.a 366KB

libnewlib.a 338KB

libesp_wifi.a 296KB

libwear_levelling.a 295KB

libesp_http_client.a 281KB

libtcp_transport.a 275KB

libesp_adc.a 273KB

libunity.a 247KB

libefuse.a 236KB

libesp-tls.a 228KB

libhttp_parser.a 213KB

libesp_local_ctrl.a 211KB

libesp_hid.a 201KB

libpthread.a 173KB

libesp_gdbstub.a 172KB

libesp_ringbuf.a 151KB

libprotocol_examples_common.a 141KB

libesp_timer.a 136KB

libesp_event.a 132KB

libsoc.a 119KB

libesp_rom.a 111KB

libmbedtls.a 109KB

libapp_trace.a 109KB

libapp_update.a 104KB

libesp_pm.a 95KB

libesp_phy.a 90KB

libesp_partition.a 88KB

libesp_https_ota.a 86KB

libcxx.a 86KB

liblog.a 69KB

libWiFi.a 67KB

libperfmon.a 48KB

libUART_HMI.a 46KB

libFFT.a 40KB

libespcoredump.a 36KB

libxtensa.a 35KB

libADC.a 31KB

libcmock.a 23KB

libmain.a 20KB

libesp_common.a 20KB

libesp_app_format.a 11KB

libulp.a 11KB

app-flash_args 77B

CMakeDetermineCompilerABI_CXX.bin 4KB

CMakeDetermineCompilerABI_C.bin 4KB

TIME_T_SIZE.bin 4KB

.bin_timestamp 115B

.bin_timestamp 107B

bootloader-complete 0B

bootloader-configure 0B

bootloader-done 0B

bootloader-download 0B

bootloader-flash_args 84B

bootloader-install 0B

bootloader-mkdir 0B

bootloader-patch 0B

bootloader-update 0B

arm_linear_interp_data.c 4.1MB

arm_common_tables.c 965KB

arm_dct4_init_f32.c 793KB

arm_dct4_init_q31.c 630KB

arm_dct4_init_q15.c 490KB

arm_rfft_init_f32.c 337KB

arm_rfft_init_q31.c 322KB

transform_tests_common_data.c 270KB

arm_rfft_init_q15.c 250KB

共 2000 条

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