CN202837842U - Double-difference time interval admeasuring device - Google Patents
Double-difference time interval admeasuring device Download PDFInfo
- Publication number
- CN202837842U CN202837842U CN 201220556141 CN201220556141U CN202837842U CN 202837842 U CN202837842 U CN 202837842U CN 201220556141 CN201220556141 CN 201220556141 CN 201220556141 U CN201220556141 U CN 201220556141U CN 202837842 U CN202837842 U CN 202837842U
- Authority
- CN
- China
- Prior art keywords
- difference
- differential attachment
- coding
- differential
- time interval
- 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
Images
Landscapes
- Measurement Of Unknown Time Intervals (AREA)
Abstract
The utility model discloses a double-difference time interval admeasuring device which comprises a first difference device, second difference devices, a coding and processing circuit and a displayer, wherein the first difference device is used for first-level difference quantization, the first difference device is a difference circuit which is delayed based on quantization periods, and a plurality of routes of time signals are output by the first difference device. The second difference devices are used for second-level difference quantization, the second difference devices are difference circuits based on signal time phase relation, and the quantity of the second difference devices corresponds to that of the time signal output routes of the first difference device. Signal input of the first difference device and the second difference devices are connected with the coding and processing circuit, and time signals of the first difference device and the second difference devices are calculated by the coding and processing circuit to ensure time intervals. The double-difference time interval admeasuring device has the advantage of being high in measuring accuracy.
Description
Technical field
The utility model relates to electrical application technology, specifically refers to a kind of pair of difference time interval measuring instrucment.
Background technology
Along with modern atomic frequency standard, the development of opctical frequency standard and navigator fix technology, requirement is had higher requirement for the measuring accuracy of temporal frequency, the measuring technique of present time mostly is based on the raising of device performance, but the raising to precision of the raising of device performance is very limited, and traditional measuring instrument all is based on single quantization delay measuring technique, owing to be subjected to the restriction of device delay character, the raising of precision is also very limited.
Summary of the invention
The purpose of this utility model is the shortcoming and defect that exists in order to overcome prior art, and provides a kind of measuring accuracy high two difference time interval measuring instrucments.
For achieving the above object, the technical solution of the utility model is to comprise following assembly: the first differential attachment that is used for first order differential quantization, this first differential attachment is based on the difference channel that postpones during quantizing, this first differential attachment output multi-channel time signal;
The second differential attachment that is used for second level differential quantization, this second differential attachment be the difference channel of facies relationship during based on signal, and it is corresponding that the time signal of the quantity of this second differential attachment and the first differential attachment is exported way;
Coding and treatment circuit, the signal input of described the first differential attachment and the second differential attachment is connected on coding and the treatment circuit, and coding carries out the calculative determination time interval with treatment circuit to the first differential attachment and the second differential attachment time signal;
Display is connected in coding and treatment circuit, is used for displaying time interval numerical value;
Further arranging is that described coding and treatment circuit also are connected with the RS232 interface.
The utility model has utilized advantage between the two by the two-stage differential computing of design the first differential attachment and the second differential attachment, and the accurate measurement in the time interval of formation has improved measuring accuracy.
Below in conjunction with specification drawings and specific embodiments the utility model is done further introduction.
Description of drawings
Fig. 1 the utility model embodiment theory diagram;
The arrangenent diagram of Fig. 2 the utility model first order differential attachment;
The arrangenent diagram of Fig. 3 the utility model second level differential attachment.
Embodiment
Below by embodiment the utility model is carried out concrete description; only be used for the utility model is further specified; can not be interpreted as the restriction to the utility model protection domain, the technician in this field can make some nonessential improvement and adjustment to the utility model according to the content of above-mentioned utility model.
Embodiment of the present utility model as Figure 1-3, comprise following assembly: the first differential attachment 1 that is used for first order differential quantization, this first differential attachment is based on the difference channel that postpones during quantizing, this first differential attachment output multi-channel time signal; The system of this first differential attachment adopts the CPLD chip, and its model is EPM7128SLC84-15, and its layout connects as shown in Figure 2,
The second differential attachment 2 that is used for second level differential quantization, this second differential attachment be the difference channel of facies relationship during based on signal, and it is corresponding that the time signal of the quantity of this second differential attachment and the first differential attachment is exported way; This second differential attachment 2 of present embodiment is lag line and the gate circuit on the PCB, and its layout connects as shown in Figure 3
Coding and treatment circuit, the signal input of described the first differential attachment and the second differential attachment is connected on coding and the treatment circuit, and coding carries out the calculative determination time interval with treatment circuit to the first differential attachment and the second differential attachment time signal; Present embodiment should coding be that its model is AT89S52 based on the Fundamentals of Mono-Chip Computers design with treatment circuit.
Display is connected in coding and treatment circuit, is used for displaying time interval numerical value;
In addition, the described coding of present embodiment and treatment circuit also are connected with the RS232 interface.
Principle of work of the present utility model is that whole system is designed to be comprised of two-stage differential time interval measurement system, be based on respectively quantize difference channel that device postpones and during based on signal the difference channel of facies relationship form.Utilize the method for two differential delay line, the time interval is refined as that the differential delay line that consists of with the long time delay device quantizes and the small time is used based on the microstrip line differential delay line method of signal time-space relationship formation and measures.So both overcome device differential delay line lack of resolution and little with the narrow contradiction of lag line measurement range, utilized advantage between the two, the accurate measurement in the time interval of formation.Adopt the one-level differential system based on quantizing the device delay system, utilize the lag characteristic of CPLD device that measures of quantization is carried out in measured signal.The differential system of facies relationship utilizes wire to carry out differential quantization to the remaining immeasurable short time of the quantification differential system of previous stage again during based on signal.Utilize coding and treatment circuit to carry out computing and obtain final short time interval value obtaining two parts time interval measurement value, by display device measured value is shown in real time at last.
Claims (2)
1. two difference time interval measuring instrucment is characterized in that comprising following assembly:
The first differential attachment that is used for first order differential quantization, this first differential attachment are based on the difference channel that postpones during quantizing, this first differential attachment output multi-channel time signal;
The second differential attachment that is used for second level differential quantization, this second differential attachment be the difference channel of facies relationship during based on signal, and it is corresponding that the time signal of the quantity of this second differential attachment and the first differential attachment is exported way;
Coding and treatment circuit, the signal input of described the first differential attachment and the second differential attachment is connected on coding and the treatment circuit, and coding carries out the calculative determination time interval with treatment circuit to the first differential attachment and the second differential attachment time signal;
Display is connected in coding and treatment circuit, is used for displaying time interval numerical value.
2. a kind of pair of difference time interval measuring instrucment according to claim 1, it is characterized in that: described coding and treatment circuit also are connected with the RS232 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556141 CN202837842U (en) | 2012-10-26 | 2012-10-26 | Double-difference time interval admeasuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556141 CN202837842U (en) | 2012-10-26 | 2012-10-26 | Double-difference time interval admeasuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202837842U true CN202837842U (en) | 2013-03-27 |
Family
ID=47949506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220556141 Expired - Fee Related CN202837842U (en) | 2012-10-26 | 2012-10-26 | Double-difference time interval admeasuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202837842U (en) |
-
2012
- 2012-10-26 CN CN 201220556141 patent/CN202837842U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102841260B (en) | DC microresistivity measuring system | |
| CN103837741A (en) | Equal-precision frequency testing system based on FPGA and design method thereof | |
| CN101839931A (en) | Alternating current signal measurement device, system and method | |
| CN203224283U (en) | Liquid flow field calibration device | |
| CN203929885U (en) | Based on FPGA etc. precision frequency testing system | |
| CN106908750A (en) | A kind of electric energy meter pulse error detection method and device | |
| CN202837842U (en) | Double-difference time interval admeasuring device | |
| CN202720273U (en) | High-precision phase difference detection device | |
| CN202204872U (en) | Three-phase electric energy meter measurement component based on manganese-copper current divider sampling | |
| CN205209427U (en) | Wireless accurate strain measuring device | |
| CN203479906U (en) | Four-wire system Pt100 resistor measuring circuit | |
| CN204290943U (en) | The analog to digital conversion circuit of high dynamic range | |
| CN203178378U (en) | Electronic transformer digit quantity output calibration device | |
| CN202710695U (en) | Cable detector | |
| CN204302353U (en) | A kind of power detection system based on Hall element | |
| CN103455400A (en) | Method for testing SMI2 (intel scalable memory interface 2) signals of internal memory | |
| CN202974355U (en) | Ultrasonic flow measurement device | |
| Ren et al. | Multi-channel temperature measurement system based on LabVIEW | |
| CN102981051A (en) | Digital display type frequency meter | |
| CN103105524A (en) | Direct voltage tester and method for testing direct voltage | |
| CN103017718A (en) | Depthometer circuit | |
| CN202939204U (en) | Measuring meter for measuring current and voltage values | |
| CN105182067B (en) | SOC frequency test method | |
| CN204142837U (en) | Portable online resistance conductance detector | |
| CN201740812U (en) | Power measuring circuit in multi-functional check meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20181026 |