Summary of the invention
It is correlated with in the measurement of parameter for solving current electronic equipment sequential, the measurement problem of more tested point cannot be realized, and prior art there are certain requirements to measured signal (as altogether, common-mode voltage), and the technical problems such as time-ordered measurement scope and limitednumber, this utility model provides the time-ordered measurement device of a kind of Time-Series analysis module and composition thereof, and concrete technical scheme is as follows:
A kind of Time-Series analysis module, it is characterised in that including:
One input signal processing unit, nurses one's health to measured signal;
One Date Conversion Unit, is AD converted the measured signal after conditioning;
One comparing unit, compares with at least one the datum benchmark set respectively by the measured signal after conditioning;
One switch arrays, for the comparison signal of gating comparing unit output;
One sequential analytic unit, according to comparison signal needed for the output Signal-controlled switch array gating of Date Conversion Unit, and receives the comparison signal that switch arrays transmit and carries out Time-Series analysis;
One correction unit, according to the control signal obtained from Time-Series analysis unit, is corrected input signal processing unit.
A kind of time-ordered measurement device, described at least two, Time-Series analysis module and master controller form, and each Time-Series analysis module is connected with master controller each through bus.
Advantage of the present utility model:
1, by arranging multiple Time-Series analysis module, it is possible to realize the time-ordered measurement to the multiple test point of electronic equipment;
2, motility is higher, measures the kind wider (sequential scope is longer, and kind is more) of sequential parameter;
3, this utility model apparatus structure is simple, and extensibility is good;
4, when input conditioning amplifier is configured to instrument amplifier, the requirement of measured signal is lower measures range of signal wider (as signal contains high common-mode voltage).
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As it is shown in figure 1, this utility model time-ordered measurement device mainly comprises two large divisions: master controller and multiple Time-Series analysis module, each Time-Series analysis module is connected with master controller by bus (clock and signal).
In Time-Series analysis module such as Fig. 1 in broken box shown in, including input signal processing unit, Date Conversion Unit, correction unit, Time-Series analysis unit, comparing unit, DA and switch arrays.
Wherein input signal processing unit (such as Fig. 2) and include resistor network and operational amplifier, the measured signal of input is decayed by resistor network, bandwidth compensation, can carrying out coupling build because of the amplitude of signal, bandwidth, Time-Series analysis unit provides the switching signal of measured signal attenuation ratio. Measured signal after resistor network process is mated, amplifies by operational amplifier, for driving data converting unit. Operational amplifier can be single supply or dual power supply, it is possible to matches reasonable bandwidth, input impedance, configuration according to measured signal feature, it is possible to apolegamy instrument amplifier, it is possible to match programmable gain amplifier and unit amplifier according to AD input requirements. Time-Series analysis unit provides the control coding of programmable gain amplifier.
Date Conversion Unit is converter, the analogue signal that operational amplifier exports is converted to digital signal, and it is sent to Time-Series analysis unit with certain interface encoded mode, can according to requiring rationally to select the AD of the different parameters such as switching rate, figure place according to measured signal.
Comparing unit: be made up of multiple comparators, at least one programmable reference level benchmark that prime exports signal and the output of Time-Series analysis unit compares, and exports comparison signal.
Switch arrays, comparison signal needed for gating.
Time-Series analysis unit mainly includes arithmetic processor, and Time-Series analysis unit controls switch arrays gating desired signal according to measuring parameter (such as measuring electrifying timing sequence, power-off sequential), delivers to correlation timing analysis module by bus. Such as, the startup time of test power supply, assume there are two Time-Series analysis modules, one of them Time-Series analysis module is received power input, measure the input signal of power supply, another Time-Series analysis module receives the outfan of power supply, measures power output signal, corresponding Time-Series analysis unit control switch arrays by these two signal conditions relatively after signal deliver to bus after carry out electrifying timing sequence analysis in relevant Time-Series analysis module.
Correction unit, Time-Series analysis unit sends control signals to correction unit, and correction unit performs the correction to input signal processing unit error according to this control signal.
DA, for delivering to comparing unit after the programmable reference level benchmark that Time-Series analysis unit provides is carried out digital-to-analogue conversion, can be built in arithmetic processor, it is possible to external.
Switch arrays are crucial: (be not limited to clock in order to gate bus signal, trigger, level comparison signal, transmission direction is not limit) yet, sequential function can be realized, it is possible to be therefore expanded according to the requirement gating (such as a certain Time-Series analysis module increase ratio relatively edge and another Time-Series analysis module suppression ratio relatively edge) measuring sequential parameter.
Bus is adopted to realize synchronous transmission of signal, improve the synchronicity measured, synchronous bus is bidirectional bus, its signal comes from one or more in some Time-Series analysis modules, also can be provided by outside, and the signal in bus can transmit the arbitrary road to multiple Time-Series analysis modules or appoint N road as the synchronizing signal of Time-Series analysis, each analysis module is according to synchronizing signal, it is achieved each parameter measurement of input signal and the time-ordered measurement analytic function of complexity.
This Time-Series analysis device can realize the measurement of some parameters such as rising edge, trailing edge, can realize the sequential of complicated wave form, delay etc. simultaneously and measure.
The above is the preferred implementation of this time sequence measuring circuit, but under the premise without departing from present principles, it is also possible to making some improvement and deformation, these improve and deformation is also for institute's protection domain.
This utility model Time-Series analysis device operation principle:
Measured signal delivers to operational amplifier by the attenuation ratio that resistor network gating is suitable, zooms in or out through operational amplifier, or controlled programming gain selects range, and concrete condition is relevant with AD input range. Signal after operational amplifier is nursed one's health delivers to converter, delivers to each comparator simultaneously and compares with setting datum. The output signal of each comparator, bus is delivered to by controlling switch arrays, and the digital quantity of converter output, the arithmetic processor of data time sequence analytic unit is delivered to certain coded system, arithmetic processor carries out Digital Signal Analysis and Processing according to the data obtained.