CN115265812A - Zynq-based high-throughput spectrum data acquisition and transmission device and method - Google Patents
Zynq-based high-throughput spectrum data acquisition and transmission device and method Download PDFInfo
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- CN115265812A CN115265812A CN202210868696.4A CN202210868696A CN115265812A CN 115265812 A CN115265812 A CN 115265812A CN 202210868696 A CN202210868696 A CN 202210868696A CN 115265812 A CN115265812 A CN 115265812A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 238000001228 spectrum Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003595 spectral effect Effects 0.000 claims abstract description 37
- 238000013139 quantization Methods 0.000 claims abstract description 22
- 238000011002 quantification Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 10
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- 230000003993 interaction Effects 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 4
- 238000012935 Averaging Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000004148 unit process Methods 0.000 claims description 3
- 238000013480 data collection Methods 0.000 claims 5
- 238000011897 real-time detection Methods 0.000 abstract description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/30—Arrangements in telecontrol or telemetry systems using a wired architecture
Abstract
The invention discloses a Zynq-based high-throughput spectrum data acquisition and transmission device and a Zynq-based high-throughput spectrum data acquisition and transmission method, wherein the device comprises a Zynq chip, a CCD (charge coupled device) driving module, an AD (analog-to-digital) quantization module and a Laser control module; the Zynq chip comprises an FPGA unit and an ARM unit which are connected through an AXI bus; the FPGA unit is respectively connected with the CCD driving module and the AD quantization module; the CCD driving module drives the CCD detector and obtains analog quantity spectral data collected by the CCD detector; the AD quantification module is connected with the CCD driving module to process the spectrum data of the analog quantity into the spectrum data of the digital quantity; the FPGA unit controls the AD quantization module and acquires spectral data of digital quantity; the ARM unit acquires temperature data from the Laser control module and controls the Laser control module. The invention realizes the real-time acquisition and high-flux transmission of spectral data and the real-time detection of short pulse signals.
Description
Technical Field
The invention relates to the field of spectral data acquisition and transmission, in particular to a Zynq-based high-throughput spectral data acquisition and transmission device and method.
Background
The existing spectrometers such as Raman spectrometers and fiber optic spectrometers mostly adopt a multi-chip scheme with architectures such as ARM + FPGA, ARM + DSP, DSP + FPGA, etc., the scheme has a complex system structure and is difficult to develop and maintain, and communication and data transmission among multiple chips are limited by the number of interconnected pins among the multiple chips, so that the transmission speed is influenced; at present, the SPI protocol adopted by the spectrometer is 4-wire single-wire transmission; when the requirement on the transmission speed is not high, the transmission mode can meet the requirement, but when the requirement on the transmission speed is high, high flux is particularly required, and when the frame frequency is high, the requirement cannot be met due to the limitation of a transmission format. In addition, when the spectrometer detects the short pulse signal, the CCD detector is required to enter a working state (i.e. start integration) within a short time to detect the short pulse signal; the existing CCD detector needs a certain starting time when entering a working state after receiving a signal, and can not meet the requirement. Thus, there is a need for improvements and enhancements in the art.
Disclosure of Invention
The invention aims to solve the technical problem of providing a Zynq-based high-flux spectral data acquisition and transmission device and method, and solving the problems of complex structure and low transmission rate of the existing spectrometer due to the adoption of a multi-chip structure.
The invention provides a Zynq-based high-flux spectral data acquisition and transmission device for solving the technical problems, which comprises a Zynq chip, a CCD driving module, an AD quantization module and a Laser control module; the Zynq chip comprises an FPGA unit and an ARM unit; the FPGA unit and the ARM unit are connected through an AXI bus and perform data interaction; the FPGA unit is respectively connected with the CCD driving module and the AD quantization module; the CCD driving module drives the CCD detector and obtains analog quantity spectral data collected by the CCD detector; the FPGA unit controls the CCD driving module; the AD quantization module is connected with the CCD driving module to process the spectrum data of the analog quantity into the spectrum data of the digital quantity; the FPGA unit controls the AD quantization module and acquires spectral data of digital quantity; the ARM unit is connected with the Laser control module; the Laser control module controls the Laser and obtains a temperature signal fed back by the Laser; and the ARM unit acquires temperature data from the Laser control module and controls the Laser control module.
The ARM unit is connected with the USB transmission module, and the USB transmission module is connected with the PC through the USB interface; the ARM unit obtains a control command from the PC through the USB transmission module and transmits the obtained spectrum data to the PC.
Furthermore, the device also comprises a CCD interface and a Laser interface, wherein the CCD driving module is connected to the CCD detector through the CCD interface; the Laser control module is connected to the Laser through a Laser interface.
Furthermore, the Zynq chip power supply device further comprises a power supply module, and the power supply module supplies power to the Zynq chip, the CCD driving module, the AD quantization module and the Laser control module.
The invention adopts another technical scheme to solve the technical problems and provides a Zynq-based high-throughput spectrum data acquisition and transmission method, which comprises the following steps: step S1: initializing configuration, wherein the ARM unit sends an initialization command, and the FPGA unit receives the initialization command and updates a register; the FPGA is pre-started to generate a pre-starting time sequence, and the CDD detector is driven by the CCD driving module to be in a state to be detected; step S2: the ARM unit receives a starting command, sends out a Laser driving signal to drive the Laser to work, and sends out a CCD control signal to drive the CDD detector to work; and step S3: laser generated by the laser irradiates on a detected object to be scattered, part of scattered light generates red shift, and the CDD detector collects the spectrum of the scattered light after the red shift to obtain the spectrum data of analog quantity; and step S4: the CCD driving module acquires the spectrum data of the analog quantity, and the AD quantification module converts the spectrum data of the analog quantity into the spectrum data of the digital quantity and transmits the spectrum data to the FPGA unit; step S5: the FPGA unit processes the digital quantity of spectrum data and transmits the processed spectrum data to the ARM unit through the AXI bus.
Further, the step S2 includes: step S21: the ARM unit receives a starting command and sends out a Laser driving signal, and the Laser control module drives the Laser to work according to the Laser driving signal; step S22: after the laser responds, the ARM unit sends out a CCD control signal, and the FPGA unit acquires the CCD control signal through an AXI bus; the FPGA unit generates a starting time sequence for driving the CCD detector after receiving the CCD control signal, generates a time sequence for the CCD detector to work through the CCD driving module, outputs the time sequence to the CCD detector through the CCD interface, and starts integration by the detector; step S23: the Laser control module receives a temperature measurement voltage signal of the Laser, converts the temperature measurement voltage signal into temperature data and sends the temperature data to the ARM unit, and the ARM unit controls the Laser to refrigerate through PID adjustment through a soft core processor of the ARM unit according to the temperature data, so that the Laser works within a set temperature range.
Further, the step S4 further includes: the AD quantization module adjusts the sampling position when the spectrum data of the analog quantity is converted into the spectrum data of the digital quantity according to the received sampling adjustment instruction; and the sampling adjustment instruction is sent out by the ARM unit and is transmitted to the AD quantization module through the FPGA unit.
Further, the processing of the digital amount of spectrum data by the FPGA unit in step S5 includes summing spectrum data of 1 to 65535 frames and averaging spectrum data of any frame in a range of 1 to 65535 frames.
Furthermore, the ARM unit performs data interaction with the PC through the USB transmission module, and the ARM unit acquires a control command from the PC; and the ARM unit transmits the processed spectral data to a PC.
Compared with the prior art, the invention has the following beneficial effects: according to the Zynq-based high-throughput spectrum data acquisition and transmission device and method, a Zynq chip is adopted to replace a multi-chip framework of an FPGA and an ARM, the structure is simplified, and the data transmission process is simplified; the acquired data are processed by the FPGA unit and then directly transmitted to the PC by the ARM unit without intermediate transfer, so that the transmission efficiency is improved, and the real-time acquisition and high-flux real-time transmission of the spectral data are realized; the short pulse signal is detected in real time by pre-starting the CCD driving module.
Drawings
FIG. 1 is a schematic diagram of a Zynq-based high-throughput spectral data acquisition and transmission device according to an embodiment of the invention;
fig. 2 is a flow chart of a method for acquiring and transmitting high-throughput spectral data based on Zynq according to an embodiment of the invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
Fig. 1 is a schematic diagram of a Zynq-based high-throughput spectral data acquisition and transmission device implemented in the present invention.
Referring to fig. 1, the high-throughput spectrum data acquisition and transmission device based on Zynq according to the embodiment of the present invention includes a Zynq chip, a CCD driving module, an AD quantization module, and a Laser control module;
the Zynq chip is an SoC integrated with an FPGA and a microprocessor, which is released by the company Sailing, and comprises an FPGA unit and an ARM unit; the FPGA unit and the ARM unit are connected through an AXI (Advanced eXtensible Interface) bus and perform data interaction;
the FPGA unit is respectively connected with the CCD driving module and the AD quantization module;
the CCD driving module drives the CCD detector and obtains analog quantity spectral data collected by the CCD detector, and the CCD driving module is connected to the CCD detector through a CCD interface; the FPGA unit controls the CCD driving module;
the AD quantification module is connected with the CCD driving module to process the spectrum data of the analog quantity into the spectrum data of the digital quantity; the FPGA unit controls the AD quantization module and acquires spectral data of digital quantity; the AD quantification module adopts an AD4000 or AD9826 chip;
the ARM unit is connected with the Laser control module;
the Laser control module controls the Laser and obtains a temperature signal fed back by the Laser, and the Laser control module is connected to the Laser through a Laser interface; the ARM unit acquires temperature data from the Laser control module and controls the Laser control module, wherein the Laser control module mainly uses TS5A3159QDBVRQ and TLV62565DBV chips.
The ARM unit is connected with the USB transmission module, and the USB transmission module is connected with the PC through the USB interface; the ARM unit obtains a control command from the PC through the USB transmission module, and transmits the obtained spectrum data to the PC, and the USB transmission module mainly uses a USB3320C-EZK chip. The Zynq chip power supply device further comprises a power supply module, and the power supply module supplies power to the Zynq chip, the CCD driving module, the AD quantization module and the Laser control module.
Referring to fig. 2, the method for acquiring and transmitting high-throughput spectrum data based on Zynq according to the embodiment of the present invention includes the following steps:
step S1: initializing configuration, namely sending an initialization command by an ARM unit, and receiving the initialization command by an FPGA unit to update a register; the FPGA is pre-started to generate a pre-starting time sequence, and the CDD detector is driven by the CCD driving module to be in a state to be detected, namely in a state to be integrated;
step S2: the ARM unit receives a starting command, sends out a Laser driving signal to drive the Laser to work, and sends out a CCD control signal to drive the CDD detector to work; the method specifically comprises the following steps:
step S21: the ARM unit receives a starting command and sends out a Laser driving signal, and the Laser control module drives the Laser to work according to the Laser driving signal;
step S22: after the laser responds, the ARM unit sends out a CCD control signal, and the FPGA unit acquires the CCD control signal through an AXI bus; after receiving the CCD control signal, the FPGA unit generates a starting time sequence for driving the CCD detector, generates a time sequence for the CCD detector to work through the CCD driving module, outputs the time sequence to the CCD detector through the CCD interface, and starts integration by the detector; and the real-time detection of the short pulse signal is realized.
The ARM unit can set the time for generating the Laser driving signal according to the response time of the Laser, and if the response time of the Laser is 1ms, the generated Laser driving signal is 1ms earlier than the generated CCD control signal.
Step S23: the Laser control module receives a temperature measurement voltage signal of the Laser, converts the temperature measurement voltage signal into temperature data and sends the temperature data to the ARM unit, and the ARM unit controls the Laser to refrigerate through PID adjustment through a soft core processor of the ARM unit according to the temperature data, so that the Laser works within a set temperature range.
After the working temperature (such as 25 ℃) of the Laser is set, and the working temperature is higher than the set working temperature, the temperature measurement signal of the Laser is sent to the ARM unit through the Laser control module, and the Laser is refrigerated through the PID control of the soft-core processor to form negative feedback, so that the working temperature of the Laser is always maintained at the set temperature (such as 25 +/-0.2 ℃).
And step S3: laser generated by a laser irradiates on a detected object to be scattered, part of scattered light generates red shift, namely Raman shift, and a CDD (complementary double-detector) collects spectrum of the scattered light after the red shift to obtain spectrum data of analog quantity;
and step S4: the CCD driving module acquires the spectrum data of the analog quantity, and the AD quantification module converts the spectrum data of the analog quantity into the spectrum data of the digital quantity and transmits the spectrum data to the FPGA unit;
the AD quantization module adjusts the sampling position when the spectrum data of the analog quantity is converted into the spectrum data of the digital quantity according to the received sampling adjustment instruction, so that the sampling position of the effective pixel signal of the spectrum data can be adjusted in real time; and the sampling adjustment instruction is sent out by the ARM unit and is transmitted to the AD quantization module through the FPGA unit.
Step S5: the FPGA unit processes the digital spectrum data and transmits the processed spectrum data to the ARM unit through the AXI bus. The processing of the digital quantity of spectral data by the FPGA unit includes summing 1 to 65535 frames of spectral data and averaging any frame of spectral data in the range of 1 to 65535 frames.
The AXI bus has a clock of 100MHz, a bit width of transmitted data of 32 bits and a bandwidth of 3.2Gbps, and can meet the requirement of high-throughput transmission.
Preferably, the ARM unit performs data interaction with the PC through the USB transmission module, and the ARM unit acquires a control command from the PC; and the ARM unit transmits the processed spectral data to the PC. The USB transmission module can be USB2.0 or USB3.0, wherein the USB2.0 can reach 480Mbps at high speed, and the USB3.0 can reach 5.0Gbps, so that the high-throughput transmission requirement can be met.
In summary, in the high-throughput spectrum data acquisition and transmission device and method based on Zynq of the embodiments of the present invention, a multi-chip architecture of FPGA + ARM is replaced with a Zynq chip, so that the structure is simplified, and the data transmission process is simplified; the acquired data are processed by the FPGA unit and then directly transmitted to the PC by the ARM unit without intermediate transfer, so that the transmission efficiency is improved, and the real-time acquisition and high-flux real-time transmission of the spectral data are realized; the short pulse signals are detected in real time by pre-starting the CCD driving module.
Although the present invention has been described with respect to one or more embodiments thereof, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (9)
1. A Zynq-based high-throughput spectral data acquisition and transmission device is characterized by comprising a Zynq chip, a CCD driving module, an AD quantization module and a Laser control module;
the Zynq chip comprises an FPGA unit and an ARM unit; the FPGA unit and the ARM unit are connected through an AXI bus and perform data interaction;
the FPGA unit is respectively connected with the CCD driving module and the AD quantization module;
the CCD driving module drives the CCD detector and obtains analog quantity spectral data collected by the CCD detector; the FPGA unit controls the CCD driving module;
the AD quantification module is connected with the CCD driving module to process the spectrum data of the analog quantity into the spectrum data of the digital quantity; the FPGA unit controls the AD quantization module and acquires spectral data of digital quantity;
the ARM unit is connected with the Laser control module;
the Laser control module controls the Laser and acquires a temperature signal fed back by the Laser; and the ARM unit acquires temperature data from the Laser control module and controls the Laser control module.
2. The Zynq-based high-throughput spectral data collection and transmission device of claim 1, further comprising a USB transmission module and a USB interface, wherein the ARM unit is connected with the USB transmission module, and the USB transmission module is connected with a PC through the USB interface; the ARM unit obtains a control command from the PC through the USB transmission module and transmits the obtained spectrum data to the PC.
3. The Zynq-based high-throughput spectral data acquisition and transmission apparatus according to claim 1, further comprising a CCD interface and a Laser interface, wherein said CCD drive module is connected to a CCD detector through the CCD interface; the Laser control module is connected to the Laser through a Laser interface.
4. The Zynq-based high-throughput spectral data acquisition and transmission apparatus according to claim 1, further comprising a power supply module that supplies power to the Zynq chip, the CCD drive module, the AD quantization module and the Laser control module.
5. A Zynq-based high-throughput spectral data acquisition and transmission method, which is applied to the spectral data real-time acquisition and transmission device according to any one of claims 1-4, and is characterized by comprising the following steps:
step S1: initializing configuration, wherein the ARM unit sends an initialization command, and the FPGA unit receives the initialization command and updates a register; the FPGA is pre-started to generate a pre-starting time sequence, and the CDD detector is driven by the CCD driving module to be in a state to be detected;
step S2: the ARM unit receives a starting command, sends out a Laser driving signal to drive the Laser to work, and sends out a CCD control signal to drive the CDD detector to work;
and step S3: laser generated by the laser irradiates on a detected object to be scattered, part of scattered light generates red shift, and the CDD detector collects the spectrum of the scattered light after the red shift to obtain the spectrum data of analog quantity;
and step S4: the CCD driving module acquires the spectrum data of the analog quantity, and the AD quantification module converts the spectrum data of the analog quantity into the spectrum data of the digital quantity and transmits the spectrum data to the FPGA unit;
step S5: the FPGA unit processes the digital quantity of spectrum data and transmits the processed spectrum data to the ARM unit through the AXI bus.
6. The Zynq-based high throughput spectral data collection and transmission method of claim 5, wherein the step S2 comprises:
step S21: the ARM unit receives a starting command and sends out a Laser driving signal, and the Laser control module drives the Laser to work according to the Laser driving signal;
step S22: after the laser responds, the ARM unit sends out a CCD control signal, and the FPGA unit acquires the CCD control signal through an AXI bus; the FPGA unit generates a starting time sequence for driving the CCD detector after receiving the CCD control signal, generates a time sequence for the CCD detector to work through the CCD driving module, outputs the time sequence to the CCD detector through the CCD interface, and starts integration by the detector;
step S23: the Laser control module receives a temperature measurement voltage signal of the Laser, converts the temperature measurement voltage signal into temperature data and sends the temperature data to the ARM unit, and the ARM unit controls the Laser to refrigerate through PID adjustment through a soft core processor of the ARM unit according to the temperature data, so that the Laser works within a set temperature range.
7. The Zynq-based high-throughput spectral data collection and transmission method according to claim 5, wherein said step S4 further comprises: the AD quantization module adjusts the sampling position when the spectrum data of the analog quantity is converted into the spectrum data of the digital quantity according to the received sampling adjustment instruction; and the sampling adjustment instruction is sent out by the ARM unit and is transmitted to the AD quantization module through the FPGA unit.
8. The Zynq-based high-throughput spectral data collection and transmission method of claim 5, wherein the FPGA unit processing the digital amount of spectral data in step S5 comprises summing 1 to 65535 frames of spectral data and averaging any frame of spectral data in the range of 1 to 65535 frames.
9. The Zynq-based high-throughput spectral data collection and transmission method of claim 5, wherein the ARM unit performs data interaction with a PC through a USB transmission module, and the ARM unit obtains control commands from the PC; and the ARM unit transmits the processed spectral data to a PC.
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