Domestic AD acquisition board

Abstract

The invention provides a domestic AD acquisition board. The system comprises a programmable logic gate array, an off-chip program memory, a power supply module, AD acquisition chips, a level translator and an interface connector, the interface connector is connected with the two AD acquisition chips to acquire 16 paths of independent 0-5V analog quantities, the AD acquisition chips convert levels into serial bus data through the level translator, and the serial bus data is connected with the off-chip program memory. And the programmable logic gate array receives the serial bus data of the level translator and then transmits the acquired data to the Compact PCI interface bus. According to the invention, the starting program of the programmable logic gate array can be stored in a power-down manner through the off-chip program storage; and the completely localized chip is completely controllable.

Description

Technical Field

[0001] The invention relates to a domestic AD acquisition board. Background Art

[0002] AD acquisition circuits are often needed in existing computer control systems in the military industry. The main frames of AD acquisition boards on the market usually use imported programmable logic gate arrays in combination with AD acquisition chips to complete circuit design. The main components are not domestically produced and are easily restricted. At present, the military industry has strict restrictions on the types and quantities of imported components for boards. In order to realize the domestic design of AD acquisition circuits, the utility model designs a domestic AD acquisition board general circuit that supports 16 independent 0-5V analog quantity acquisition and CompactPCI interface bus interface. The selected components are domestically produced to achieve complete autonomy and control. For example, a total temperature sensor data acquisition card based on PCI bus disclosed in CN208903100U forms 4 AI analog inputs and 4 AO analog outputs IO through FPGA, PCI bridge chip, and PCI interface, but uses FPGA as the main board chip, which makes it easily restricted. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a domestically produced AD acquisition board.

[0004] The present invention is achieved through the following technical solutions.

[0005] The invention provides a domestic AD acquisition board comprising a programmable logic gate array, an off-chip program memory, a power module, an AD acquisition chip, a level converter, and an interface connector. The interface connector is connected with two AD acquisition chips to acquire 16 independent 0-5V analog quantities. The AD acquisition chip converts the level into serial bus data through the level converter. After receiving the serial bus data from the level converter, the programmable logic gate array transmits the acquired data to a CompactPCI interface bus.

[0006] The programmable logic gate array is respectively connected with a power module, an off-chip program memory, a level converter and an interface connector.

[0007] The AD acquisition chip is connected to the level converter and the interface connector respectively.

[0008] The power module can provide 3.3V, 1.8V, and 1.0V power.

[0009] The AD acquisition chip is a single-chip 8-channel 12-bit precision acquisition chip.

[0010] The off-chip program memory can save the startup program of the programmable logic gate array when power is off.

[0011] The beneficial effects of the present invention are: the startup program of the programmable logic gate array can be saved when power is off through the off-chip program storage; and the completely domestically produced chip can realize full controllability of the chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the board principle of the present invention; DETAILED DESCRIPTION

[0013] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0014] like Figure 1 As shown, the present invention provides a domestic AD acquisition board; based on the 3UCompactPCI interface bus, it can provide 16 independent 0-5V analog acquisition interfaces. The main frame includes a programmable logic gate array, an off-chip program memory, a power module, an AD acquisition chip, a level converter, and an interface connector to complete the functions of the board. The 16 independent 0-5V analog acquisition interfaces are connected to the AD acquisition chip through the interface connector, and the AD acquisition chip is connected to the programmable logic gate array after the level is converted by the level converter. The programmable logic gate array receives the serial bus data of the level converter to collect the data of the 16 independent 0-5V analog quantities, and finally transmits the collected data to the CompactPCI interface bus. The programmable logic gate array is also connected to the off-chip program memory, which is used to store the system program of the programmable logic gate array. The programmable logic gate array is also connected to the power module, and the power module supplies power to the programmable logic gate array through the interface connector.

[0015] The selected devices are 100% domestically produced components and can meet the requirements of complete independent control.

[0016] The programmable logic gate array is respectively connected with a power module, an off-chip program memory, a level converter and an interface connector.

[0017] The AD acquisition chip is connected to the level converter and the interface connector respectively.

[0018] The power module can provide 3.3V, 1.8V, and 1.0V power.

[0019] The AD acquisition chip is a single-chip 8-channel 12-bit precision acquisition chip.

[0020] The off-chip program memory can save the startup program of the programmable logic gate array when power is off.

Claims

1. A domestic AD acquisition board, characterized by: A programmable logic gate array, an off-chip program memory, a power module, an AD acquisition chip, a level converter, and an interface connector. The interface connector is connected to two AD acquisition chips to collect 16 independent 0-5V analog quantities. The AD acquisition chip converts the level into serial bus data through the level converter. After the programmable logic gate array receives the serial bus data from the level converter, it transmits the collected data to the CompactPCI interface bus.

2. The domestic AD acquisition board according to claim 1, characterized in that: The programmable logic gate array is respectively connected with a power module, an off-chip program memory, a level converter and an interface connector.

3. The domestic AD acquisition board as claimed in claim 1, characterized in that: The AD acquisition chip is connected to the level converter and the interface connector respectively.

4. The domestic AD acquisition board as claimed in claim 1, characterized in that: The power module can provide 3.3V, 1.8V, and 1.0V power.

5. The domestic AD acquisition board as claimed in claim 1, characterized in that: The AD acquisition chip is a single-chip 8-channel 12-bit precision acquisition chip.

6. The domestic AD acquisition board according to claim 1, characterized in that: The off-chip program memory can save the startup program of the programmable logic gate array when power is off.

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