CN102594354B - Time-to-digital converter based on time-to-amplitude conversion method - Google Patents
Time-to-digital converter based on time-to-amplitude conversion method Download PDFInfo
- Publication number
- CN102594354B CN102594354B CN201210052916.2A CN201210052916A CN102594354B CN 102594354 B CN102594354 B CN 102594354B CN 201210052916 A CN201210052916 A CN 201210052916A CN 102594354 B CN102594354 B CN 102594354B
- Authority
- CN
- China
- Prior art keywords
- time
- data
- signal
- trigger pip
- wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Analogue/Digital Conversion (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
The invention discloses a time-to-digital converter based on a time-to-amplitude conversion method. A triangle wave generation device, a data collection device and a data reception and processing device are employed to measure information of time difference between a trigger edge of a first trigger signal and a trigger edge of a second trigger signal. The time-to-digital converter is characterized in that: the triangle wave generation device outputs a symmetrical positive triangle wave voltage analog signal; when the trigger edge of the first trigger signal or the trigger edge of the second trigger signal comes, an A/D converter of the data collection device collects and maintains the voltage value of the symmetrical positive triangle wave voltage analog signal at the moment; within time from the trigger edge of the first trigger signal to the trigger edge of the second trigger signal, a signal peak and valley counter of the data collection device records information of the peak and the valley of the symmetrical positive triangle wave voltage analog signal; and the data reception and processing device receives and carries out processing on the data, so that a time-to-digital conversion result is obtained. According to the invention, the time-to-digital converter can be applied to correlated fields of laser range finding and laser three-dimensional measurement.
Description
Technical field
The present invention relates to a kind of time-to-digit converter, particularly a kind of time-to-digit converter based on time-amplitude converter technique.
Background technology
In order to meet different application demand, people have been developed different time figure conversion methods, are divided into three kinds from design philosophy: direct count method, delay collimation method and time-amplitude converter technique.Direct count method principle is simple, but the clock frequency that counter works needs is difficult to accomplish very high, and this has directly affected conversion accuracy.Postpone collimation method and utilize semiconductor technology to be easy to making and integrated, conversion accuracy is high, but the dynamic range of Measuring Time is restricted.
Time-amplitude converter technique utilizes the corresponding relation of time interval length and certain physical quantity changes in amplitude amount, and by measuring amplitude variable quantity, indirect calculation goes out time interval length.The most frequently used is RC circuit, and electric capacity is discharged and recharged, and measures the variable quantity of electric capacity both end voltage.There is capacity fall off in common RC circuit, the problems such as capacitor discharge time is long, propose afterwards follow-on RC circuit and can obtain the time amplifying technique of higher conversion accuracy, but on the whole, although this method can obtain higher conversion accuracy, there is larger Dead Time (interval time of measurement) and the little shortcoming of Measuring Time dynamic range.
Summary of the invention
In order to solve the shortcomings existing in traditional time-amplitude converter technique, the invention provides a kind of time-to-digit converter based on time-amplitude conversion, utilize the characteristic of symmetrical positive triangle wave voltage simulating signal, first tested time span is converted to the voltage variety of symmetrical positive triangle wave voltage simulating signal, then process the voltage data obtaining, finally obtain the result of time figure conversion.
A kind of time-to-digit converter based on time-amplitude converter technique provided by the invention, adopts following technical scheme:
A kind of time-to-digit converter based on time-amplitude converter technique, adopt triangular wave generating means, data collector and data receiver and treating apparatus to measure the time difference information on triggering edge with the triggering edge of the second trigger pip of the first trigger pip, it is characterized in that described triangular wave generating means comprises triangular-wave generator and control circuit thereof; Described data collector comprises A/D converter and signal wave crest trough counter; Described data receiver and treating apparatus comprise data-switching transmitting device and data calculation element; Described triangular-wave generator is exported symmetrical positive triangle wave voltage simulating signal under the control of control circuit; Described data collector gathers the symmetrical positive triangle wave voltage simulating signal of described triangular-wave generator output; The triggering of described the first trigger pip along or the triggering of described the second trigger pip when arriving, described A/D converter collection also keeps the magnitude of voltage of symmetrical positive triangle wave voltage simulating signal this moment; The triggering edge of described the first trigger pip was arrived in the time on triggering edge of described the second trigger pip, crest and the trough information of the positive triangle wave voltage simulating signal of described signal wave crest trough counter records symmetry; The data that described data receiver and treating apparatus receive and processing said data harvester obtains; After the data-switching that described data-switching transmitting device obtains described data collector, pass to described data calculation element, calculate the time difference information on triggering edge with the triggering edge of the second trigger pip of the first trigger pip.
Wherein, the symmetrical positive triangle wave voltage simulating signal of described triangular-wave generator output, requires the frequency stability of output signal high, and nonlinear distortion is little.
Wherein, the duty of described triangular-wave generator control circuit control triangular-wave generator, frequency and the peak value of the symmetrical positive triangle wave voltage simulating signal that adjusting is exported.
Wherein, described A/D converter has two, and A/D conversion accuracy meets the requirement of time figure conversion accuracy, and the analog to digital conversion time meets the requirement of interval time of measurement, and possesses external trigger control function, by the duty of the first trigger pip or the second trigger pip control A/D converter.
Wherein, the type (without counting or crest or trough) of first counting of described signal wave crest trough counter records signal wave peak number, trough number and differentiation record, and possess counting and control function, by the duty of the first trigger pip and the second trigger pip control signal Wave crest and wave trough counter.
Wherein, described data-switching transmitting device possesses the function of Data Format Transform and transmission, and the data layout of output meets the requirement of described data calculation element.
Main characteristics of the present invention: have time figure conversion accuracy high, interval time of measurement is short obtains the greatly advantage of expansion with the range of dynamic measurement time.
Benefit of the present invention and application prospect: the present invention is on the basis of time-amplitude converter technique, make full use of the characteristic of symmetrical positive triangle wave voltage simulating signal, realized the large time figure conversion of high precision, short interval time of measurement and time range of dynamic measurement.The present invention can be applied to laser ranging and 3-d laser measurement association area.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the structured flowchart of a kind of time-to-digit converter based on time-amplitude converter technique of the present invention
Fig. 2 is the signal timing diagram of a kind of time-to-digit converter based on time-amplitude converter technique of the present invention
Embodiment
Fig. 1 has shown the structured flowchart of a kind of time-to-digit converter based on time-amplitude converter technique of the present invention, in invention embodiment, comprises triangular wave generating means 1, data collector 2 and data receiver and treating apparatus 3.Triangular-wave generator 12 is under the control of control circuit 11, and the positive triangle wave voltage simulating signal SGN-0 that output is symmetrical, as the data input signal of A/D converter 21 and A/D converter 22 and signal wave crest trough counter 23.The first trigger pip SGN-1 is connected with the external trigger control end of A/D converter 21 and the counting control end of signal wave crest trough counter 23.When the triggering of the first trigger pip SGN-1 is when arriving, A/D converter 21 is started working, and gathers and keep the magnitude of voltage of the positive triangle wave voltage simulating signal SNG-0 of this moment symmetry, and control signal Wave crest and wave trough counter 23 starts counting; The second trigger pip SGN-2 is connected with the external trigger control end of A/D converter 22 and the counting control end of signal wave crest trough counter 23.When the triggering of the second trigger pip SGN-2 is when arriving, A/D converter 22 is started working, and gathers and keep the magnitude of voltage of the positive triangle wave voltage simulating signal SNG-0 of this moment symmetry, and control signal Wave crest and wave trough counter 23 stops counting.The data that data-switching transmitting device 31 obtains data collector 2 are transferred to data calculation element 32 after format conversion, calculate the triggering of the first trigger pip SGN-1 along the time difference information on the triggering edge to the second trigger pip SGN-2.
Fig. 2 has shown a kind of signal timing diagram of the time-to-digit converter based on time-amplitude converter technique, and the cycle of establishing symmetrical positive triangle wave voltage simulating signal SGN-0 is T, and peak value is V
p.At t
1in the moment, the triggering of the first trigger pip SGN-1 is along arrival, and A/D converter 21 is started working, and gathers and the magnitude of voltage of the symmetrical positive triangle wave voltage simulating signal SGN-0 that keeps is V
1.At t
2in the moment, the triggering of the second trigger pip SGN-2 is along arrival, and A/D converter 22 is started working, and gathers and the magnitude of voltage of the symmetrical positive triangle wave voltage simulating signal SGN-0 that keeps is V
2.T
1time be carved into t
2in the moment, the crest number of the symmetrical positive triangle wave voltage simulating signal SGN-0 that signal wave crest trough counter 23 is recorded is n
p1, trough number is n
p2, the type of first counting is type (0 represents that 1 represents crest without counting, and 2 represent trough).T
1time be carved into t
2the mistiming T in moment
t2-t1:
The above is embodiments of the invention, and according to content disclosed by the invention, the equalization of doing changes and modifies, and all should fall within protection scope of the present invention.
Claims (6)
1. the time-to-digit converter based on time-amplitude converter technique, adopt triangular wave generating means, data collector and data receiver and treating apparatus to measure the time difference information on triggering edge with the triggering edge of the second trigger pip of the first trigger pip, it is characterized in that described triangular wave generating means comprises triangular-wave generator and control circuit thereof; Described data collector comprises A/D converter and signal wave crest trough counter; Described data receiver and treating apparatus comprise data-switching transmitting device and data calculation element; Described triangular-wave generator is exported symmetrical positive triangle wave voltage simulating signal under the control of control circuit; The cycle of the positive triangle wave voltage simulating signal of described symmetry is T, and peak voltage is V
p, trough voltage is 0; Described data collector gathers the symmetrical positive triangle wave voltage simulating signal of described triangular-wave generator output; The triggering of described the first trigger pip is when arriving, and described A/D converter collection also keeps the magnitude of voltage V of symmetrical positive triangle wave voltage simulating signal this moment
1; The triggering of described the second trigger pip is when arriving, and described A/D converter collection also keeps the magnitude of voltage V of symmetrical positive triangle wave voltage simulating signal this moment
2; The triggering of described the first trigger pip is along in the time on the triggering edge to described the second trigger pip, and the crest of the positive triangle wave voltage simulating signal of described signal wave crest trough counter records symmetry is counted n
pl, trough counts n
p2type type with first counting; The data that described data receiver and treating apparatus receive and processing said data harvester obtains; After the data-switching that described data-switching transmitting device obtains described data collector, pass to described data calculation element, according to computing formula:
Calculate the time difference information T on triggering edge with the triggering edge of the second trigger pip of the first trigger pip
t2-t1.
2. a kind of time-to-digit converter based on time-amplitude converter technique according to claim 1, is characterized in that the symmetrical positive triangle wave voltage simulating signal of described triangular-wave generator output, requires the frequency stability of output signal high, and nonlinear distortion is little.
3. a kind of time-to-digit converter based on time-amplitude converter technique according to claim 1, it is characterized in that the duty of described triangular-wave generator control circuit control triangular-wave generator, regulate frequency and the peak value of the symmetrical positive triangle wave voltage simulating signal of exporting.
4. a kind of time-to-digit converter based on time-amplitude converter technique according to claim 1, it is characterized in that described A/D converter has two, A/D conversion accuracy meets the requirement of time figure conversion accuracy, the analog to digital conversion time meets the requirement of interval time of measurement, and possesses external trigger control function, by the duty of the first trigger pip or the second trigger pip control A/D converter.
5. a kind of time-to-digit converter based on time-amplitude converter technique according to claim 1, it is characterized in that the type of first counting of described signal wave crest trough counter records signal wave peak number, trough number and differentiation record, and possess counting and control function, by the duty of the first trigger pip and the second trigger pip control signal Wave crest and wave trough counter.
6. a kind of time-to-digit converter based on time-amplitude converter technique according to claim 1, it is characterized in that described data-switching transmitting device possesses the function of Data Format Transform and transmission, the data layout of output meets the requirement of described data calculation element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052916.2A CN102594354B (en) | 2012-03-02 | 2012-03-02 | Time-to-digital converter based on time-to-amplitude conversion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052916.2A CN102594354B (en) | 2012-03-02 | 2012-03-02 | Time-to-digital converter based on time-to-amplitude conversion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102594354A CN102594354A (en) | 2012-07-18 |
| CN102594354B true CN102594354B (en) | 2014-08-20 |
Family
ID=46482610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210052916.2A Expired - Fee Related CN102594354B (en) | 2012-03-02 | 2012-03-02 | Time-to-digital converter based on time-to-amplitude conversion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102594354B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832944A (en) * | 2012-08-16 | 2012-12-19 | 北京航空航天大学 | Time-to-digital converter based on time-phase conversion method |
| CN102929123B (en) * | 2012-11-14 | 2014-04-16 | 北京理工大学 | Measurement system for start time difference between high-speed light signal acquisition equipment and high-speed electric signal acquisition equipment |
| CN108195533B (en) * | 2017-12-14 | 2019-07-19 | 北京理工大学 | A kind of system and method being accurately positioned the data acquisition moment |
| CN110568749B (en) * | 2019-08-30 | 2021-04-09 | 华中师范大学 | Time-to-digital converter circuit, time-to-digital converter device, time-to-digital converter apparatus, and method of controlling time-to-digital converter device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6999013B1 (en) * | 2003-11-06 | 2006-02-14 | Marvell International Ltd | Built-in real-time digital non-linearity measurement device and method for analog to digital converters |
| CN101515156A (en) * | 2009-04-09 | 2009-08-26 | 北京航空航天大学 | Precise time measuring method |
| CN101572551A (en) * | 2008-04-30 | 2009-11-04 | 中芯国际集成电路制造(北京)有限公司 | Time-to-digit converter and method thereof |
-
2012
- 2012-03-02 CN CN201210052916.2A patent/CN102594354B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6999013B1 (en) * | 2003-11-06 | 2006-02-14 | Marvell International Ltd | Built-in real-time digital non-linearity measurement device and method for analog to digital converters |
| CN101572551A (en) * | 2008-04-30 | 2009-11-04 | 中芯国际集成电路制造(北京)有限公司 | Time-to-digit converter and method thereof |
| CN101515156A (en) * | 2009-04-09 | 2009-08-26 | 北京航空航天大学 | Precise time measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102594354A (en) | 2012-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102594354B (en) | Time-to-digital converter based on time-to-amplitude conversion method | |
| CN105890685B (en) | A kind of device for measuring ultrasonic wave flow based on accumulated phase difference | |
| CN105527501B (en) | A kind of micro capacitance method | |
| CN102589627B (en) | Absolute propagation time measuring method for ultrasonic flow meter | |
| CN104121956B (en) | Time difference measuring method of time difference type ultrasonic flow meter | |
| CN101900761B (en) | High-accuracy non-integer-period sampled harmonic analysis and measurement method | |
| CN107728460B (en) | A kind of high-resolution time interval measurement method | |
| CN103575984A (en) | Harmonic analysis method based on Kaiser window double-spectral-line interpolation FFT | |
| CN102928677A (en) | Nano pulse signal acquiring method | |
| CN102645583A (en) | Broadband rapid frequency measuring method based on cluster period phase process | |
| CN103185837A (en) | Method for measuring frequency of power system | |
| CN105699738A (en) | PWM-based AC signal effective value measurement method | |
| CN105548667A (en) | Alternating current signal effective value measuring device | |
| CN101866165B (en) | Echoed flight time measuring method based on field programmable gate array | |
| CN102495280B (en) | Anti-noise wide-range frequency measurement method and phase locking frequency meter | |
| CN104764522A (en) | Ultrasonic power measurement method and device | |
| CN202372798U (en) | Nano-second (ns) grade time interval measurement device | |
| CN103575979B (en) | A kind of method of digitized measurement ac frequency | |
| CN203950131U (en) | A kind of high precision time interval measurement device based on FPGA | |
| CN101458278A (en) | Modulation domain analysis measuring set based on time scale phase shift and error compensation method thereof | |
| CN102914699B (en) | Modulation domain measurement system and method thereof | |
| CN203191708U (en) | Precise time-interval measuring instrument | |
| CN202393904U (en) | Error verifying device used for electric energy metering device | |
| CN101702617A (en) | High-precision +/-180 DEG digital phase distinguishing method and applying device thereof | |
| CN201387481Y (en) | Error detecting device for digital watt-hour meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20150302 |
|
| EXPY | Termination of patent right or utility model |