A pulse time interval measurement method and circuit based on an integrated phase and frequency detector
A technology of phase detector and frequency detector and pulse time, which is applied in the direction of electrical unknown time interval measurement, device for measuring time interval, phase measurement with measurement, etc. It can solve the problems of impossibly high measurement accuracy, susceptibility to external interference, and production cost. Advanced problems, to achieve the effect of high precision, expanded application field, and simple measurement circuit
Inactive Publication Date: 2017-10-17
SHANDONG JIAOTONG UNIV
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The traditional analog method is inseparable from the analog-to-digital conversion process, which is easily affected by external interference, and the measurement accuracy cannot be very high; while the digital method does not require analog-to-digital conversion and has high measurement accuracy, but requires a large-scale integrated circuit (ASIC) Circuit) support, complex process, high production cost
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] In conjunction with the accompanying drawings, the pulse time interval measurement method based on the integrated phase and frequency detector of the present invention is carried out according to the following steps:
[0018] a. Choose an integrated phase detector and frequency detector MCH12140 with ECL logic, its two pulse input terminals are R and V respectively, and the two phase detector output terminals are respectively
[0019] b. The input pulse 1 passes through the limiting circuit 1 and is input to the input terminal R of the integrated phase and frequency detector MCH12140; the input pulse 2 passes through the limiting circuit 2 and is input to the input terminal V of the integrated phase and frequency detector MCH12140. The structure and parameters of the two limiting circuits are exactly the same, and the resistors R1 and R2 take appropriate values so that figure 2 The static potentials of A and B points in the limiter circuit are both +3.8V, so that t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of electronic measurement, and particularly relates to a measuring method and circuit for a pulse time interval based on an integrated phase detection discriminator.According to the measuring method and circuit, two input pulses are subjected to amplitude limiting through an amplitude limiter, a phase difference pulse is obtained through the phase ratio of the high-frequency integrated phase detection discriminator, and after active proportional-integral filtering and A / D conversion are carried out, the phase difference between the two input pulses is calculated through an MCU; one of the two input pulses is subjected to frequency division to be input into one port of the MCU, and the period of the pulse is measured through the MCU; according to the measured phase difference and the measured pulse period, the time interval between the two pulses is calculated through the MCU, and the result is sent to be displayed.The high-speed phase detection technology, the bipolar analog-digital conversion technology and the high-speed frequency division technology are synthetically used, and under the control of the MCU, the time interval between the two same-frequency pulse signals within the wide frequency range is accurately measured.
Description
technical field [0001] The invention relates to pulse time interval measurement technology in the technical field of electronic measurement, in particular to a pulse time interval measurement method and circuit based on an integrated phase and frequency detector. Background technique [0002] Pulse time interval measurement technology is of great significance to the national economy and national defense construction, and has a wide range of applications in modern communications, positioning timing, aerospace measurement and control, digital oscilloscopes and other fields. Time interval measurement technology has a long history, and can be roughly divided into two categories: analog method and digital method, mainly including time-amplitude conversion method, time interval extension method, vernier method, tapped delay line method, etc. The traditional analog method is inseparable from the analog-to-digital conversion process, which is easily affected by external interference...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G04F10/06G04F10/04
CPCG04F10/04G04F10/06
Inventor 司朝良
Owner SHANDONG JIAOTONG UNIV