Universal real-time multi-channel parallel timing measuring system

Abstract

The invention discloses a universal real-time multi-channel parallel timing measuring system. The universal real-time multi-channel parallel timing measuring system comprises an ARMSTM32 series processor, a multi-disc TDC-GPX chip, a start/stop signal input interface array, a digital/simulation diverter switch array, a multi-channel AGC amplifying circuit, a multi-channel high-speed comparison circuit, a touch LCD, an external memory, a temperature sensor and an upper computer. According to the universal real-time multi-channel parallel timing measuring system, multi-channel simultaneous parallel timing is achieved, and the real-time performance is good; simulation, digital, single-ended and difference multiple types of signal input can be supported at the same time, and the applied range is wide; wire length compensation, channel consistency correction and temperature compensation of the multi-disc TDC-GPX chip and high precision are achieved; one microprocessor can control 1-4 TDC-GPX chips to form a basic measuring unit, multiple channels are needed, a plurality of basic measuring units are stacked for use, the structure is compact, and the expansibility is strong; by the aid of upper computer software based on a LabView, the development difficulty of graphical monitoring and displaying application programs is made to be simple.

Description

technical field [0001] The invention relates to a multi-channel parallel high-precision time interval measurement technology, that is, a multi-channel parallel high-precision timing technology, in particular to a real-time multi-channel parallel general timing measurement system. Background technique [0002] TDC (time-to-digital conversion) technology is mainly used in ultrasonic flowmeter, ultrasonic heat meter, density measurement, laser range finder, laser scanner, magnetostrictive locator, TOF (time-of-flight) spectral analysis, TOF measurement and biomedical technology Wait. As a chip provider of low power consumption and small size TDC application technology in the world, German acam company has launched three series of TDC products, namely: TDC-GP1, TDC-GP2 and TDC-GPX, among which TDC-GPX is the series The most powerful of the products. [0003] Chinese patent specification "Oilfield oil flow measurement system based on TDC-GP2" (Patent No.: CN202648717U), "A lase...

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Problems solved by technology

[0003] Chinese patent specification "Oilfield oil flow measurement system based on TDC-GP2" (Patent No.: CN202648717U), "A laser distance measuring device based on TDC technology" (Patent No.: CN202182717U), "A TDC-GP2 chip-based GPS frequency standard locking time interval measurement system" (Patent No.: CN202257088U), "High-precision position signal detection device based on TDC timer" (Patent No.: CN202229774U), both disclose TDC-GP2 series products with only two measurement channels The disadvantages of these patents are: (1) they are all based on specific applications and have no universality; (2) when the application requires more channels to work at the same time, it is very difficult to expand; (3) the start signal and The stop signal only supports digital signals; (4) The measurement data is read out through the SPI (Serial Peripheral Interface) bus, which is difficult to meet real-time applications; (5) The accuracy mentioned is only the accuracy of the TDC-GP2 chip itself , did not give the overall accuracy of the invented device; (6) Although a method of averaging through multiple measurements has been proposed for the accuracy compensation problem, this method cannot adapt to real-time measurement and the measurement device carried by the motion platform

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