CN211603917U - Multifunctional pulse output module based on PC104+ platform - Google Patents

Abstract

The utility model relates to a multifunctional pulse output module based on a PC104+ platform, which comprises a receiving unit, a signal processing unit and an output unit which are connected in sequence; the receiving unit comprises a PC104+ bus interface and a bridging chip, the signal processing unit comprises an FPGA module, a power supply module, an RS232 input circuit and an RS422 differential level circuit, and the output unit comprises a D/A conversion module, a level conversion chip and an external connector interface. The multi-path and multi-amplitude pulse can be simultaneously applied to different scenes, and has the advantages of simplicity, convenience, easy realization of operation and the like, so that the multi-path and multi-amplitude pulse can be applied in various aspects.

Description

Multifunctional pulse output module based on PC104+ platform

Technical Field

The utility model belongs to the industrial measurement field especially relates to a multi-functional pulse output module based on PC104+ platform.

Background

In the field of industrial measurement, the analog quantity output by the module can be used in certain infrared measurement and comparison applications.

In industrial control, some input quantities (such as pressure, temperature, flow rate, rotating speed and the like) are analog quantities which change continuously, some actuating mechanisms (such as a servo motor, a regulating valve, a recorder and the like) require a PLC to output analog signals, and a CPU of the PLC can only process digital quantities. The analog quantity is firstly converted into standard current or voltage such as 4-20 mA, 1-5V and 0-10V by a sensor and a transmitter, and the analog quantity is converted into digital quantity by an A/D converter used by the PLC. The digital quantity may be binary or decimal, the current or voltage with sign is generally expressed by binary complement after A/D conversion, and the D/A converter converts the digital output quantity of PLC into analog voltage or current to control the executing mechanism.

The multifunctional pulse output module based on the PC104+ platform has the main task of finishing D/A conversion (analog quantity output) and then outputting an analog quantity pulse signal to other platforms for industrial control.

SUMMERY OF THE UTILITY MODEL

The utility model discloses can satisfy some needs analog quantity of industry and control and measure the professional application in professional fields such as, also have the application of higher frequency in aspects such as aerospace ground test, emulation. The multi-path and multi-amplitude pulse can be simultaneously applied to different scenes, and has the advantages of simplicity, convenience, easy realization of operation and the like, so that the multi-path and multi-amplitude pulse can be applied in various aspects.

In order to solve the problems in the background art, the present invention is realized by the following technical solutions:

a multifunctional pulse output module based on a PC104+ platform comprises a receiving unit, a signal processing unit, a storage unit and an output unit which are connected in sequence;

the receiving unit comprises a PC104+ bus interface and a bridging chip, wherein the PC104+ bus interface is connected with the bridging chip and is used for receiving a bus signal of the PC104+ and converting the bus signal into a local bus signal;

the signal processing unit comprises an FPGA module, a power supply module, an RS232 input circuit and an RS422 differential level circuit, the FPGA module is connected with the bridge chip, and the power supply module, the RS232 input circuit and the RS422 differential level circuit are also connected with the FPGA module to realize the connection control of an address bus and a data bus and the input and output of various control signals, and simultaneously control 16 analog quantity output channels, 16 TTL bidirectional digital quantity input/output, 2 RS232 communication and 4 pairs of RS422 differential levels after finishing the interaction of data and commands of the multifunctional pulse output module and the CPU board;

the output unit comprises a D/A conversion module, a level conversion chip and an external connector interface, the D/A conversion module is respectively connected with the FPGA module and the external connector interface and used for processing digital signals, converting the digital signals into analog signals and outputting the analog signals to the execution mechanism, and the level conversion chip is also respectively connected with the FPGA module and the external connector interface and used for converting voltage signals and outputting the voltage signals to the execution mechanism.

As a practical further explanation: the storage unit comprises an EEPROM storage chip respectively connected with the bridge chip and the FPGA module and an SDRAM access memory only connected with the FPGA module.

As a practical further explanation: the D/A conversion module comprises a DAC digital-to-analog conversion chip and an analog switch, one end of the DAC digital-to-analog conversion chip is connected with the FPGA, the other end of the DAC digital-to-analog conversion chip is connected with the analog switch, and the other end of the analog switch is connected with an external connector interface.

Compared with the prior art, this practicality has following profitable technological effect:

1. the utility model discloses can export 17 way pulses, its pulse signal pulse width can be established, and the time delay relation lessons are established, and the transmission cycle can be established to can export the following pulse signal of 6 types:

(1)2 paths of +12V pulse signals, and an amplitude adjusting range (12 +/-2) V;

(2)6 paths of +3.8V pulse signals, and the amplitude adjusting range (3.8 +/-1.2) V;

(3)1 path of pulse signal of-3.8V, amplitude regulation range (-3.8 +/-1.2) V;

(4)1 path of pulse signal, and the amplitude adjusting range (+1 +/-0.1V);

(5)3 paths of TTL level pulse signals;

(6)4 TTL changes RS422 level pulse signal.

Therefore, the output of multi-channel multifunctional pulses is realized through the PC104+ bus interface, the professional application of certain industrial fields requiring analog quantity to carry out control, measurement and the like is met, and the high-frequency application is realized in the aspects of space and ground testing, simulation and the like. The multi-path and multi-amplitude pulse can be simultaneously applied to different scenes, and has the advantages of simplicity, convenience, easy realization of operation and the like, so that the multi-path and multi-amplitude pulse can be applied in various aspects.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the present application product is conventionally placed in use, and are merely used for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning 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 meaning of the above terms in the present application can be understood in a specific case by those skilled in the art.

As shown in fig. 1, a multifunctional pulse output module based on a PC104+ platform includes a receiving unit, a signal processing unit, a storage unit, and an output unit, which are connected in sequence, for implementing a board setting function.

Specifically, the receiving unit comprises a PC104+ bus interface and a bridging chip, wherein the PC104+ bus interface is connected with the PC104+ bus interface in an inserting mode, and the bridging chip is connected with the PC104+ bus interface to receive a bus signal of the PC104+ and convert the bus signal into a local bus signal; the bridge chip is a PCI90054 chip.

The signal processing unit comprises an FPGA module, a power supply module, an RS232 input circuit and an RS422 differential level circuit, the FPGA module is connected with the bridge chip, and the power supply module, the RS232 input circuit and the RS422 differential level circuit are also connected with the FPGA module to realize the connection control of an address bus and a data bus and the input and output of various control signals, and simultaneously control 16 analog quantity output channels, 16 TTL bidirectional digital quantity input/output channels, 2 RS232 communication channels and 4 pairs of RS422 differential levels when finishing the interaction of data and commands of the multifunctional pulse output module and the CPU board; the FPGA module selects an XC6SLX-FGG484 chip, and the power supply module selects TPS54316PWP, TPS54312PWP, TPS54315PWP and DCP020515DU chips to convert +5V of the bus into +3.3V, +1.2V, +2.5V, +15V & -15V.

The storage unit comprises an EEPROM storage chip respectively connected with the bridge chip and the FPGA module and an SDRAM access memory only connected with the FPGA module.

The output unit comprises a D/A conversion module, a level conversion chip and an external connector interface, the D/A conversion module comprises a DAC digital-to-analog conversion chip and an analog switch, one end of the DAC digital-to-analog conversion chip is connected with the FPGA, the other end of the DAC digital-to-analog conversion chip is connected with the analog switch, the other end of the analog switch is connected with the external connector interface and used for processing digital signals, converting the digital signals into analog signals and outputting the analog signals to the execution mechanism, and the level conversion chip is also respectively connected with the FPGA module and the external connector interface and used for converting voltage signals and outputting the voltage signals to the execution mechanism; the DAC digital-to-analog conversion chip selects an AD5372 chip which is an SPI serial digital quantity, the maximum voltage output range is 4 times (20V) of the reference voltage, multiple independent output ranges can be provided, and the level conversion chip selects an SN74LV164245DGGR chip.

The interface of the external connection is a 100-pin connector with the model number of J30J-100ZKWP26-S of noble navigation, when the external connector is connected with the interface of the external connector, 16 paths of TTL digital quantity input/output signals are introduced, one group of 8 channels is provided, the two groups are provided, the direction can be set to be input or output through software, a driver selects a 74ALVC164245 chip of TI company, a bidirectional 16-bit bus transceiver is provided, and the single-channel TTL level driving current can reach 20 mA. The enable and direction of the chip can be controlled through OE and DIR pins.

The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical features of the technical solution of the present invention by those skilled in the art belong to the protection scope of the present invention.

Claims (3)

1. The utility model provides a multi-functional pulse output module based on PC104+ platform which characterized in that: the device comprises a receiving unit, a signal processing unit, a storage unit and an output unit which are connected in sequence;

the receiving unit comprises a PC104+ bus interface and a bridging chip, wherein the PC104+ bus interface is connected with the bridging chip and is used for receiving a bus signal of the PC104+ and converting the bus signal into a local bus signal;

the signal processing unit comprises an FPGA module, a power supply module, an RS232 input circuit and an RS422 differential level circuit, the FPGA module is connected with the bridge chip, and the power supply module, the RS232 input circuit and the RS422 differential level circuit are also connected with the FPGA module to realize the connection control of an address bus and a data bus and the input and output of various control signals, and simultaneously control 16 analog quantity output channels, 16 TTL bidirectional digital quantity input/output, 2 RS232 communication and 4 pairs of RS422 differential levels after finishing the interaction of data and commands of the multifunctional pulse output module and the CPU board;

the output unit comprises a D/A conversion module, a level conversion chip and an external connector interface, the D/A conversion module is respectively connected with the FPGA module and the external connector interface and used for processing digital signals, converting the digital signals into analog signals and outputting the analog signals to the execution mechanism, and the level conversion chip is also respectively connected with the FPGA module and the external connector interface and used for converting voltage signals and outputting the voltage signals to the execution mechanism.

2. The multifunctional pulse output module based on PC104+ platform of claim 1, wherein: the storage unit comprises an EEPROM storage chip respectively connected with the bridge chip and the FPGA module and an SDRAM access memory only connected with the FPGA module.

3. The multifunctional pulse output module based on PC104+ platform of claim 1, wherein: the D/A conversion module comprises a DAC digital-to-analog conversion chip and an analog switch, one end of the DAC digital-to-analog conversion chip is connected with the FPGA, the other end of the DAC digital-to-analog conversion chip is connected with the analog switch, and the other end of the analog switch is connected with an external connector interface.

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