CN216286274U - Digital signal processor for laser spectrum signal analysis - Google Patents

Abstract

The utility model provides a digital signal processor for laser spectrum signal analysis, comprising: the device comprises a main controller, a first ADC (analog to digital converter) driver, a first analog-to-digital conversion chip and a USB (universal serial bus) data port; the first ADC driver is connected with the main controller; the first analog-to-digital conversion chip is respectively connected with the first ADC driver and the first ADC input port and is used for converting the analog electric signal generated by the laser into a digital signal; and the USB data port is connected with the main controller and is used for transmitting the digital signal to the upper computer. The digital signal generated by the utility model can be directly read by the upper computer by using the USB data port without installing various analysis software on the upper computer, so that signal acquisition personnel can get rid of complicated board card connection and upper computer configuration, and one-click data acquisition and analysis can be realized.

Description

Digital signal processor for laser spectrum signal analysis

Technical Field

The utility model relates to the technical field of signal transmission, in particular to a digital signal processor for laser spectrum signal analysis.

Background

In the laser spectrum gas analysis technology, after light with different wavelengths reacts with gas to be detected, a weak electric signal can be generated through a high-sensitivity sensing module, the electric signal can be collected into an upper computer after primary amplification, and the upper computer generates readable data after being processed through a complex algorithm, so that the gas analysis process is completed. Meanwhile, in the detection process, a corresponding analog signal needs to be generated to control the output of the laser, so that the laser is tuned.

An important device needed in the above process is a data acquisition card, commonly called a board card. The board card can generate a digital signal from the acquired analog signal, and can convert the set digital signal into a corresponding analog signal for output, thereby realizing data conversion between a digital computer and an analog device. However, the existing data acquisition card has the following limitations: (1) the volume is large, the number of channels is excessive, the energy consumption is large, and some channels even need to be supplied with power by a separate power supply system. (2) It is expensive, often thousands to tens of thousands of dollars. (3) Only analog-to-digital conversion, digital-to-analog conversion and a general I/O interface are needed, and no independent data analysis function is provided, so that the system is required to be matched with upper computer software for use.

SUMMERY OF THE UTILITY MODEL

To solve the above problems, an embodiment of the present invention provides a digital signal processor for laser spectrum signal analysis.

A digital signal processor for laser spectral signal analysis, comprising:

a main controller;

a first ADC driver connected with the main controller;

the first analog-to-digital conversion chip is respectively connected with the first ADC driver and the first ADC input port, and is used for converting an analog electric signal generated in laser spectrum measurement into a digital signal and transmitting the digital signal to the main controller for processing;

and the data transmission port is connected with the main controller and is used for transmitting the processed digital signals to the upper computer.

Preferably, the method further comprises the following steps:

and the digital-to-analog conversion chip is connected with the main controller and is used for converting the digital frequency modulation signal generated by the main controller into an analog frequency modulation signal.

Preferably, the method further comprises the following steps:

and the DAC output port is connected with the digital-to-analog conversion chip and used for transmitting the analog frequency modulation signal to a laser controller for laser modulation.

Preferably, the method further comprises the following steps:

and the laser current output port is connected with the main controller and is used for transmitting the current signal generated by the main controller to the laser.

Preferably, the method further comprises the following steps:

GPIO connected to the main controller;

and the JTAG interface is connected with the main controller.

Preferably, the method further comprises the following steps:

and the laser controller connecting port is connected with the main controller.

Preferably, the method further comprises the following steps:

the temperature controller connecting port is used for connecting with a temperature controller;

and the laser connecting port is connected with the temperature controller connecting port and is used for being connected with a laser.

Preferably, the data transmission port is a USB data port.

The digital signal processor for laser spectrum signal analysis provided by the utility model has the beneficial effects that: compared with the prior art, the digital signal generated by the utility model can be directly read by the upper computer by using the USB data port without installing various analysis software on the upper computer, so that signal acquisition personnel can get rid of complicated board card connection procedures and upper computer configuration, and one-click data acquisition and analysis are realized.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 illustrates a perspective view of a digital signal processor for laser spectral signal analysis provided by an embodiment of the present invention;

FIG. 2 illustrates a top view of a digital signal processor for laser spectral signal analysis provided by an embodiment of the present invention;

FIG. 3 illustrates a back view of a digital signal processor for laser spectral signal analysis provided by an embodiment of the present invention;

fig. 4 shows a schematic diagram of a digital signal processor for laser spectral signal analysis according to an embodiment of the present invention.

1. GPIO; 2. a main controller; 3. a JTAG interface; 4. a first analog-to-digital conversion chip; 5. a first ADC input port; 6. a second ADC input port; 7. a third ADC input port; 8. a second analog-to-digital conversion chip; 9. a DAC output port; 10. a digital-to-analog conversion chip; 11. a laser current output port; 12. a laser connection port; 13. a temperature controller connection port; 14. the laser controller is connected with the port; 15. a power outlet; 16. a power switch; 17. a USB data port; 18. an external control key; 19. resetting the key; 20. a test indicator light; 21. a first ADC driver; 22. a second ADC driver; 23. an external memory; 24. a reset circuit; 25. and a serial communication chip.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The embodiment of the utility model aims to provide a digital signal processor for laser spectrum signal analysis, so as to solve the problem that the existing laser acquisition board card needs to rely on an upper computer to process spectrum signals in real time.

Referring to fig. 1-3, a digital signal processor for laser spectrum signal analysis includes: the device comprises a main controller 2, a first ADC driver 21, a second ADC driver 22, a first ADC input port 5, a second ADC input port 6, a third ADC input port 7, a first analog-to-digital conversion chip 4, a second analog-to-digital conversion chip 8 and a data transmission port.

A first ADC driver 21 connected to the main controller 2; the first analog-to-digital conversion chip 4 is respectively connected with the first ADC driver 21, the first ADC input port 5 and the second ADC input port 6, and is used for converting analog electric signals generated in laser spectrum measurement into digital signals and transmitting the digital signals to the main controller 2 for processing; and the data transmission port is connected with the main controller 2 and is used for transmitting the processed digital signals to an upper computer. Further, the data transmission port in this embodiment is a USB data port 17.

In this embodiment, the model of the main controller 2 is preferably TMS320F28335PTP, and the model of the first analog-to-digital conversion chip 4 is preferably AD7903 BRQZ. The model of the second analog-to-digital conversion chip 8 is preferably AD7915 BCPZ. The second ADC driver 22 is connected to the main controller 2, and the second ADC chip 8 is connected to the second ADC driver 22 and the third ADC input port 7, respectively, and the function of the second ADC chip is the same as that of the first ADC chip 4, which is not described again.

The digital signal generated by the utility model can be directly read by the upper computer through the USB data port 17 without installing various analysis software on the upper computer, so that signal acquisition personnel can get rid of complicated board card connection procedures and upper computer configuration, and one-click data acquisition and analysis can be realized.

Further, the present invention further includes, on the basis of the above embodiment: digital-to-analog conversion chip 10, DAC output port 9, and laser current output port 11.

The digital-to-analog conversion chip 10 is connected to the main controller 2, and is configured to convert the digital frequency modulation signal generated by the main controller 2 into an analog frequency modulation signal, and in this embodiment, the model of the digital-to-analog conversion chip 10 is preferably AD5721 BRUZ. And the DAC output port 9 is connected with the digital-to-analog conversion chip 10 and used for transmitting the analog frequency modulation signal to a laser controller for laser modulation. And the laser current output port 11 is connected with the main controller 2 and used for transmitting the current signal generated by the main controller 2 to the laser.

Further, the present invention further includes, on the basis of the above embodiment:

and the GPIO1 is connected with the main controller 2 and can be used for uniformly managing and controlling related devices for an extended interface. JTAG3 is a programming interface, which is an interface for programming a program to the host controller 2. The reset circuit 24 is connected to the main controller 2 and can restore the main controller to the initial state by pressing the reset button 19. The external control keys 18 are connected to the main controller 2 and are extension type keys. The serial port communication chip is connected with the main controller 2 and used for communication between the main controller and the upper computer.

The digital signal processor of the utility model is also provided with a laser controller connecting port 14, a temperature controller connecting port 13 and a laser connecting port 12.

And the laser controller connection port 14 is connected with the main controller 2, is a communication interface between the laser controller and the main controller 2, and is used for regulating and controlling parameters of the laser according to a control signal sent by the main controller 2. The temperature controller connection port 13 is a connection interface of a temperature controller on the laser and is used for being connected with the temperature controller; the laser connecting port 12 is connected with the temperature controller connecting port and is used for connecting the temperature controller and the laser together; the temperature controller can control the temperature of the laser and is used for dissipating heat of the laser.

Fig. 4 is a circuit diagram of a digital signal processor for laser spectrum signal analysis according to the present invention, and as shown in fig. 4, the digital signal processor of the present invention is mainly composed of an ultra-low noise power management module, an analog-to-digital/digital-to-analog conversion module, a DSP signal processing module (main controller), and a data transmission module. Further, AD7903_ SPI is communication between the first analog-to-digital conversion chip 4 and the main controller 2, AD7915_ SPI is communication between the second analog-to-digital conversion chip 8 and the main controller 2, EXT _ RAM is communication between the external memory 23 and the main controller 2, SCI _ TX and SCI _ RX are communication between the serial PORT communication chip 25 and the main controller 2, Reset is communication between the Reset circuit 24 and the main controller 2, and DAC _ PORT is communication between the digital-to-analog conversion chip 10 and the main controller 2. QCL _ PWR _ ON and QCL _ EN are communication between the main controller 2 and the laser controller connection port 14, TEST is communication between the main controller 2 and the TEST indicator lamp 20, and XINT is communication between the main controller 2 and the external control keys 18. The utility model can acquire weak electric signals in the laser spectrum technology by using the data transmission module, and quickly process the electric signals in real time by using the DSP signal processing module to generate usable digital signals and transmit the usable digital signals to the upper computer terminal.

The digital signal generated by the utility model can be directly read by using the upper computer without installing various analysis software on the upper computer, so that signal acquisition personnel can get rid of complicated board card connection procedures and upper computer configuration, and one-click data acquisition and analysis are realized. In addition, the utility model integrates each port and each chip on the double-sided six-layer PCB board, which not only can reduce the size of the digital signal processor to the size of a credit card, and is convenient to be applied to the fields of optical experiments and instrument and meter development, but also can ensure that the laser spectrum gas analysis system has the advantages of portability, easy use, low cost, low power consumption, high processing speed and the like.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and the present invention shall be covered by the claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (8)

1. A digital signal processor for laser spectral signal analysis, comprising:

a main controller;

a first ADC driver connected with the main controller;

the first analog-to-digital conversion chip is respectively connected with the first ADC driver and the first ADC input port, and is used for converting an analog electric signal generated in laser spectrum measurement into a digital signal and transmitting the digital signal to the main controller for processing;

and the data transmission port is connected with the main controller and is used for transmitting the processed digital signals to the upper computer.

2. The digital signal processor for laser spectral signal analysis of claim 1, further comprising:

and the digital-to-analog conversion chip is connected with the main controller and is used for converting the digital frequency modulation signal generated by the main controller into an analog frequency modulation signal.

3. The digital signal processor for laser spectral signal analysis of claim 2, further comprising:

and the DAC output port is connected with the digital-to-analog conversion chip and used for transmitting the analog frequency modulation signal to a laser controller for laser modulation.

4. The digital signal processor for laser spectral signal analysis of claim 1, further comprising:

and the laser current output port is connected with the main controller and is used for transmitting the current signal generated by the main controller to the laser.

5. The digital signal processor for laser spectral signal analysis of claim 1, further comprising:

GPIO connected to the main controller;

and the JTAG interface is connected with the main controller.

6. The digital signal processor for laser spectral signal analysis of claim 1, further comprising:

and the laser controller connecting port is connected with the main controller.

7. The digital signal processor for laser spectral signal analysis of claim 1, further comprising:

the temperature controller connecting port is used for connecting with a temperature controller;

and the laser connecting port is connected with the temperature controller connecting port and is used for being connected with a laser.

8. The digital signal processor for laser spectroscopy signal analysis of claim 1, wherein the data transfer port is a USB data port.

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