High precision time interval measurement PCI card

A time interval measurement, high-precision technology, applied in the field of measurement, can solve the problems of poor scalability, slow interface speed, etc., to achieve the effect of convenient application, clear interface, and fast transmission speed

Inactive Publication Date: 2007-08-08
AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-precision time interval measurement PCI card, which solves the problems of slow interface speed, poor programmability and expandability of current high-precision time interval measurement equipment

Method used

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  • High precision time interval measurement PCI card

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Embodiment Construction

[0017] Fig. 1 is the specific embodiment of the present invention.

[0018] The hardware 4 that is made of time interval measurement module 1, PCI bus bridge module 2 and interface logic module 3 is inserted on the PCI slot 6 of computer 5, under the control of driver program and application software 7 under Linux operating system, realize high Precision time interval measurement.

[0019] The TDC-GP1 chip uses the delay line of the COMS process to realize the conversion of time intervals to digital quantities. In this patent, it is set to work in a single-channel 125 picosecond resolution mode, using the prescaler inside the chip. This enables the chip to measure time intervals around 200 milliseconds.

[0020] It can be seen from the analysis that the interface and timing of the local bus in the PCI9054C mode cannot be directly used by the local bus interface of the TDC-GP1 chip. conversion circuit.

[0021] The PCI9054 chip works in 32-bit, 33M PCI bus, 8-bit, C-mode loc...

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Abstract

A high-precision timing interval measurement PCI card belongs to the measurement technology field. Hardware (4) includes PCI bus bridging module (2) with the core PCI9054, high-precision timing interval measurement module (1) with the core TDC-GP1, and core interface logic module (3) with the core XC3S400 FPGA; the hardware (4) comprising the timing interval measurement module (1), PCI bus bridging module (2), and interface logic module (3) is inserted in the PCI slots (6) of the computer (5), and under the control of the Linux operating system drivers and application software (7), it achieves high-precision timing interval measurement. The advantages are that it has high transmission speed, meeting the high-speed timing interval measurement application; and strong programmability, with good portability; strong functional scalability, and according to different applications, designing corresponding application software to facilitate the application in other areas.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular provides a PCI card for measuring high-precision time intervals, which is suitable for measuring high-precision pulse time intervals. It has a wide range of applications in atomic physics, astronomical experiments, laser ranging, positioning and timing, aerospace telemetry and remote control, integrated circuit design, communication and other fields. Background technique [0002] In the process of laser ranging, it is necessary to accurately measure the time interval between the time when the laser is emitted and the time when the reflected laser is received, and the distance is calculated according to the measured time interval. The measurement accuracy of the time interval is the measurement accuracy of the distance. In practice, two pulse signals are used to mark the time of laser emission and reception. This patent designs a pulse time interval measurement PCI card, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04F10/00
Inventor 房庆海王金锋
Owner AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
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