CN110334048A - A strong impact load wireless acquisition and storage circuit - Google Patents
A strong impact load wireless acquisition and storage circuit Download PDFInfo
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Abstract
本发明提供了一种强冲击载荷无线采集存储电路，该电路包括电源管理电路、信号调理电路、模数转换电路、CPU和数据存储电路；所述信号调理电路、模数转换电路、CPU和数据存储电路依次连接；所述电源管路电路与信号调理电路、模数转换电路、CPU和数据存储电路分别连接；所述模数转换电路与所述信号调理电路连接。本发明提供的电路可进行充放电管理，同时该电路采集塑速率高、体积小、功率低、可长时间保存数据，并可对存储模块进行重复擦写，提高了可重复利用性，降低了成本。
The invention provides a strong impact load wireless acquisition and storage circuit, the circuit includes a power management circuit, a signal conditioning circuit, an analog-to-digital conversion circuit, a CPU and a data storage circuit; the signal conditioning circuit, an analog-to-digital conversion circuit, a CPU and a data storage circuit The storage circuit is connected in sequence; the power pipeline circuit is connected to the signal conditioning circuit, the analog-to-digital conversion circuit, the CPU and the data storage circuit respectively; the analog-to-digital conversion circuit is connected to the signal conditioning circuit. The circuit provided by the present invention can manage charging and discharging. At the same time, the circuit has high plastic collection rate, small size, low power, can store data for a long time, and can repeatedly erase and write the storage module, which improves the reusability and reduces the cost.
Description
技术领域：Technical field:
本发明属于航空电子技术领域，具体涉及一种强冲击载荷无线采集存储电路。The invention belongs to the technical field of avionics, and in particular relates to a strong impact load wireless acquisition and storage circuit.
背景技术：Background technique:
随着战机飞行速度的提升，在飞机坠毁时，对防护记录器的抗坠毁幸存能力也有更高的要求，强冲击载荷测试装置作为抗坠毁幸存能力的标尺也应用而生。面对如何准确衡量抗坠毁幸存能力，如何准确标定强冲击载荷测试装置，那么一种能够满足耐恶劣环境、长时间保存数据、可重复利用的强冲击载荷采集存储电路必不可少。With the improvement of the flight speed of fighter jets, when the plane crashes, there are higher requirements for the anti-crash survivability of the protective recorder. The strong impact load test device is also used as a yardstick for the anti-crash survivability. Faced with how to accurately measure the crash survivability and how to accurately calibrate the strong impact load test device, a strong impact load acquisition and storage circuit that can withstand harsh environments, store data for a long time, and be reusable is essential.
发明内容：Invention content:
本发明的目的：提供一种可重复利用的强冲击载荷无线采集存储电路。The purpose of the present invention is to provide a reusable wireless acquisition and storage circuit for strong impact loads.
本发明的技术方案：Technical scheme of the present invention:
为了达成上述目的，本发明提供了如下技术方案：In order to achieve the above object, the present invention provides the following technical solutions:
一种强冲击载荷无线采集存储电路，所述电路包括电源管理电路、信号调理电路、模数转换电路、CPU和数据存储电路。A wireless acquisition and storage circuit with strong impact load, the circuit includes a power management circuit, a signal conditioning circuit, an analog-to-digital conversion circuit, a CPU and a data storage circuit.
所述信号调理电路、模数转换电路、CPU和数据存储电路依次连接；The signal conditioning circuit, the analog-to-digital conversion circuit, the CPU and the data storage circuit are sequentially connected;
所述电源管路电路与信号调理电路、模数转换电路、CPU和数据存储电路分别连接；The power pipeline circuit is respectively connected with the signal conditioning circuit, the analog-to-digital conversion circuit, the CPU and the data storage circuit;
所述模数转换电路与所述信号调理电路连接。The analog-to-digital conversion circuit is connected to the signal conditioning circuit.
优选的，所述电源管理电路包括顺次连接的电池电源管理电路、电源表决电路、电压转换电路和恒流源电路。Preferably, the power management circuit includes a battery power management circuit, a power voting circuit, a voltage conversion circuit and a constant current source circuit connected in sequence.
优选的，所述电池电源管理电路采用专用电池管理芯片，实现对可充放电锂电池的充放电管理。Preferably, the battery power management circuit uses a dedicated battery management chip to realize the charge and discharge management of the rechargeable lithium battery.
优选的，所述电源表决电路主要用于实现锂电池与外部电源供电的选择功能，当接入外部电源时，该电路将切断电池供电回路，并对电池进行充电。Preferably, the power voting circuit is mainly used to realize the selection function of the lithium battery and the external power supply. When the external power supply is connected, the circuit will cut off the battery power supply circuit and charge the battery.
优选的，所述电压转换电路主要用于电源电压转换，将电源电压转换为CPU、模数转换器等采集电路器件所需要的电源电压，为采集电路提供工作电源。Preferably, the voltage conversion circuit is mainly used for power supply voltage conversion, converting the power supply voltage to the power supply voltage required by acquisition circuit components such as CPU and analog-to-digital converter, and providing working power for the acquisition circuit.
优选的，所述恒流源电路主要用于为冲击传感器提供恒流源激励，驱动冲击传感器将冲击信号转换为电压信号。Preferably, the constant current source circuit is mainly used to provide constant current source excitation for the shock sensor, and drive the shock sensor to convert the shock signal into a voltage signal.
优选的，所述信号调理电路由依次连接的高通滤波电路、电压跟随电路、可编程放大电路、低通滤波电路等组成。Preferably, the signal conditioning circuit is composed of a high-pass filter circuit, a voltage follower circuit, a programmable amplifier circuit, a low-pass filter circuit and the like connected in sequence.
优选的，所述高通滤波器电路为一阶RC高通滤波器。Preferably, the high-pass filter circuit is a first-order RC high-pass filter.
冲击传感器输出信号经过高通滤波器，滤除信号中的直流分量，避免信号中直流分量影响通道增益设置及有效信号的采集。The output signal of the shock sensor passes through a high-pass filter to filter out the DC component in the signal, so as to prevent the DC component in the signal from affecting the channel gain setting and the acquisition of effective signals.
优选的，所述可编程放大电路用于对冲击信号适当放大，实现模数转换电路在不同量程范围下的信号采集要求。Preferably, the programmable amplifying circuit is used to appropriately amplify the impact signal to meet the signal acquisition requirements of the analog-to-digital conversion circuit in different ranges.
可编程放大器选用AD公司的AD8253，该芯片分为差分仪器放大器，具有输入阻抗高、低噪声、增益可编程等特性。放大倍数可选1、 10、100、1000。根据地面配置由CPU设置采集通道增益。Programmable amplifier selects AD8253 of AD Company, this chip is divided into differential instrument amplifier, has the characteristics of high input impedance, low noise, programmable gain and so on. The magnification can be selected from 1, 10, 100, 1000. The acquisition channel gain is set by the CPU according to the ground configuration.
优选的，所述低通滤波电路采用截止频率为20kHz的2阶巴特沃斯低通滤波器，用于滤除外部干扰信号。Preferably, the low-pass filter circuit adopts a second-order Butterworth low-pass filter with a cut-off frequency of 20 kHz to filter out external interference signals.
优选的，所述模数转换电路包含2通道、16位、高速、低功耗、逐次逼近型A/D转换器，采样率可达250kbps，供电电压±5V～±15V。Preferably, the analog-to-digital conversion circuit includes a 2-channel, 16-bit, high-speed, low-power, successive approximation A/D converter with a sampling rate of up to 250kbps and a power supply voltage of ±5V-±15V.
模数转换电路可以以并行和串行的方式与CPU连接，输入信号兼容3.3V或5V电平。The analog-to-digital conversion circuit can be connected with the CPU in a parallel or serial manner, and the input signal is compatible with 3.3V or 5V levels.
优选的，所述CPU具有高速数据访问接口，能够将模数转换器转换的数字信号快速的发送至数据存储电路中，对数据进行存储。Preferably, the CPU has a high-speed data access interface, which can quickly send the digital signal converted by the analog-to-digital converter to the data storage circuit to store the data.
优选的，所述数据存储电路采用NAND FLASH芯片。Preferably, the data storage circuit uses a NAND FLASH chip.
该芯片存储容量大，改写速度快，适用于长时间、高采样率冲击数据的存储。The chip has large storage capacity and fast rewriting speed, and is suitable for storage of long-term, high-sampling-rate impact data.
本发明的有益效果：本发明提供的电路可进行充放电管理，同时该电路采集塑速率高、体积小、功率低、可长时间保存数据，并可对存储模块进行重复擦写，提高了可重复利用性，降低了成本。Beneficial effects of the present invention: the circuit provided by the present invention can manage charging and discharging, and at the same time, the circuit has high plastic collection rate, small size, low power, can store data for a long time, and can repeatedly erase and write the storage module, which improves the reliability Reusability reduces costs.
本发明提供的电路通过可编程增益控制，可实现不同信号范围的采集，使用范围宽。The circuit provided by the invention can realize the acquisition of different signal ranges through programmable gain control, and has a wide application range.
附图说明：Description of drawings:
图1本发明提供的强冲击载荷无线采集存储电路示意图；Fig. 1 schematic diagram of the strong impact load wireless acquisition and storage circuit provided by the present invention;
图2本发明电源管理电路示意图；Fig. 2 schematic diagram of the power management circuit of the present invention;
图3本发明信号调理电路示意图。Fig. 3 is a schematic diagram of the signal conditioning circuit of the present invention.
其中：1：电源管理电路；2：信号调理电路；3：模数转换电路；4：CPU；5：数据存储电路；6：电池电源管理电路；7：电源表决电路；8：电压转换电路；9：恒流源电路；10：高通滤波电路；11：电压跟随电路；12：可编程放大电路；13：低通滤波电路。Among them: 1: power management circuit; 2: signal conditioning circuit; 3: analog-to-digital conversion circuit; 4: CPU; 5: data storage circuit; 6: battery power management circuit; 7: power voting circuit; 8: voltage conversion circuit; 9: Constant current source circuit; 10: High-pass filter circuit; 11: Voltage follower circuit; 12: Programmable amplifier circuit; 13: Low-pass filter circuit.
具体实施例：Specific examples:
下面结合附图对本发明做进一步的详细描述，Below in conjunction with accompanying drawing, the present invention is described in further detail,
如图1所示，为本发明提供的强冲击载荷无线采集存储电路示意图，As shown in Figure 1, it is a schematic diagram of a strong impact load wireless acquisition and storage circuit provided by the present invention,
该电路主要由电源管理电路1、信号调理电路2、模数转换电路 3、CPU 4、数据存储电路5组成。该电路在强冲击环境下工作时，无需连接外部设备，采用电池为采集存储电路进行供电，当冲击碰撞发生时，冲击传感器产生的电压信号经过信号调理电路2调理后，由模数转换电路3完成信号采集和转换，并将转换后的数据通过CPU 4发送给数据存储电路5进行数据的长时间存储。The circuit is mainly composed of a power management circuit 1, a signal conditioning circuit 2, an analog-to-digital conversion circuit 3, a CPU 4, and a data storage circuit 5. When the circuit works in a strong impact environment, there is no need to connect external devices, and the battery is used to supply power for the acquisition and storage circuit. Complete signal acquisition and conversion, and send the converted data to the data storage circuit 5 through the CPU 4 for long-term data storage.
如图2所示，为本发明的电源管理电路示意图，As shown in Figure 2, it is a schematic diagram of the power management circuit of the present invention,
该电源管理电路1主要由顺次连接的电池电源管理电路6、电源表决电路7、电压转换电路8和恒流源电路9等组成。电池电源管理电路6采用专用电池管理芯片实现对可充放电锂电池的充放电管理，以延长电池供电时间及使用寿命。电源表决电路7主要用于实现锂电池与外部电源供电的选择功能，当接入外部电源时，该电路将切断电源供电回路，并对电池进行充电。电压转换电路8主要用于电源电压转换，将电源电压转换为CPU、模数转换器等采集电路器件所需要的电源电压，为采集电路提供工作电源。恒流源电路9主要用于为冲击传感器提供恒流源激励，驱动冲击传感器将冲击信号转换为电压信号。The power management circuit 1 is mainly composed of a battery power management circuit 6 , a power voting circuit 7 , a voltage conversion circuit 8 and a constant current source circuit 9 connected in sequence. The battery power management circuit 6 adopts a dedicated battery management chip to realize the charge and discharge management of the rechargeable and dischargeable lithium battery, so as to prolong the power supply time and service life of the battery. The power voting circuit 7 is mainly used to realize the selection function of the lithium battery and the external power supply. When the external power supply is connected, the circuit will cut off the power supply circuit and charge the battery. The voltage conversion circuit 8 is mainly used for power supply voltage conversion, and converts the power supply voltage to the power supply voltage required by acquisition circuit devices such as CPU and analog-to-digital converter, and provides working power for the acquisition circuit. The constant current source circuit 9 is mainly used to provide constant current source excitation for the shock sensor, and drive the shock sensor to convert the shock signal into a voltage signal.
如图3所示，为本发明信号调理电路示意图，As shown in Figure 3, it is a schematic diagram of the signal conditioning circuit of the present invention,
冲击信号在进行模数转换之前，均需进行信号适调。该信号调理电路2由顺次连接的高通滤波电路10、电压跟随电路11、可编程放大电路12、低通滤波电路13等组成。所述高通滤波电路10为一阶 RC高通滤波器，冲击传感器输出信号经过高通滤波器，滤除信号中的直流分量，避免信号中直流分量影响通道增益设置及有效信号的采集。可编程放大电路12对冲击信号适当放大，实现模数转换电路在不同量程范围下的信号采集要求。可编程放大电路12包括AD公司的 AD8253芯片，该芯片为差分仪器放大器，具有输入阻抗高、低噪声、增益可编程等特性。放大倍数可选1、10、100、1000。根据地面配置由CPU设置采集通道增益。所述的低通滤波电路13采用2阶巴特沃斯低通滤波器，巴特沃斯低通滤波器的截止频率为20kHz，滤除外部干扰信号。Before the analog-to-digital conversion of the impact signal, signal conditioning is required. The signal conditioning circuit 2 is composed of a high-pass filter circuit 10 , a voltage follower circuit 11 , a programmable amplifier circuit 12 , and a low-pass filter circuit 13 connected in sequence. The high-pass filter circuit 10 is a first-order RC high-pass filter. The output signal of the impact sensor passes through the high-pass filter to filter out the DC component in the signal, so as to avoid the DC component in the signal from affecting the channel gain setting and the acquisition of effective signals. The programmable amplifying circuit 12 appropriately amplifies the impact signal to realize the signal acquisition requirements of the analog-to-digital conversion circuit in different ranges. Programmable amplifying circuit 12 includes AD8253 chip of AD Company, which is a differential instrument amplifier with high input impedance, low noise, programmable gain and other characteristics. The magnification can be 1, 10, 100, 1000. The acquisition channel gain is set by the CPU according to the ground configuration. The low-pass filter circuit 13 adopts a second-order Butterworth low-pass filter, and the cut-off frequency of the Butterworth low-pass filter is 20 kHz to filter out external interference signals.
冲击信号经过调理后，进入模数转换电路3和CPU 4组成的数据采集电路中，对信号进行模数转换和采集。After the impact signal is conditioned, it enters the data acquisition circuit composed of the analog-to-digital conversion circuit 3 and the CPU 4 to perform analog-to-digital conversion and acquisition on the signal.
所述模数转换电路3包括2通道、16位、高速、低功耗、逐次逼近型A/D转换器，采样率可达250kbps，供电电压±5V～±15V。可以以并行或串行的方式与CPU连接，输出信号兼容3.3V和5V电平。The analog-to-digital conversion circuit 3 includes a 2-channel, 16-bit, high-speed, low-power, successive-approximation A/D converter with a sampling rate of up to 250 kbps and a power supply voltage of ±5V˜±15V. It can be connected to the CPU in parallel or serial, and the output signal is compatible with 3.3V and 5V levels.
所述CPU 4为高性能CPU具有高速数据访问接口，能够将模数转换器转换成的数字信号快速的发送至数据存储电路中，对数据进行存储。The CPU 4 is a high-performance CPU with a high-speed data access interface, which can quickly send the digital signal converted by the analog-to-digital converter to the data storage circuit to store the data.
数据存储电路5采用NAND FLASH芯片，该芯片存储容量大，改写速度快，用于长时间、高采样率冲击数据存储。The data storage circuit 5 adopts a NAND FLASH chip, which has a large storage capacity and a fast rewriting speed, and is used for long-time and high sampling rate impact data storage.
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.
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Application publication date: 20191015 |