CN105824000A - Method for calibrating output board card - Google Patents
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Abstract
The invention provides a method for calibrating an output board card. The method is suitable for calibrating the output value of an output board card. The output board card comprises a control module, a data selector, a sampling module, and multiple output ports connected with the control module, wherein the input end of the data selector can be coupled to any of the multiple output ports, the input end of the sampling module is coupled to the output end of the data selector, and the output end of the sampling module is coupled to the control module. The method comprises the following steps: S10, the data selector selects an actual output signal of one output port; S20, the sampling module collects the actual output signal of the output port selected by the data selector; and S30, the control module compares the result collected by the sampling module with a preset output signal of the output port, and judges whether the output state of the output port is correct or not, and the actual output signal of the output port is calibrated according to the judgment result if the control module judges that output state of the output port is not correct.
Description
Technical field
The present invention relates to board collimation technique field, particularly relate to a kind of method calibrating output board card, more specifically it relates to a kind of method calibrating high density dynamic analog output card.
Background technology
Output board card, such as analog output card, when, after use after a while, due to the existence of short term drift (temperature drift) problem, easily causing the deviation of board certainty of measurement.The most in actual applications, such as when Industry Control, exciter response, need to detect frequently the output state of each passage, i.e. need the output state real time monitoring function to each output channel, as fault verification, and i.e. calibrate output board card according to the real output signal of this output port of test result calibration.
The method of conventional calibration output board card state is to be calibrated producer by specialty, one by one detect for each passage and calibrate, but conventional output board card, such as high-density analog output card, veneer offer is multiple (such as, 32) analog output channel, if selecting routine, use the mode that each passage is detected and calibrates by standard detecting devices individually, then need to spend the longer time that each passage and standard detecting devices are carried out line, and detect one by one passage, the most not only can consume substantial amounts of man power and material, and detection and calibration accuracy to output board card is the highest.
Summary of the invention
Brief overview about the present invention given below, in order to the basic comprehension about certain aspects of the invention is provided.Should be appreciated that this general introduction is not that the exhaustive about the present invention is summarized.It is not intended to determine the key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its purpose is only to provide some concept in simplified form, in this, as the preamble in greater detail discussed after a while.
It is an object of the invention to provide a kind of method calibrating output board card, in order to overcome all of the above or portion of techniques shortcoming.
The present invention provides a kind of method calibrating output board card, it is adaptable to the output valve of calibration output board card, this output board card includes control module, data selector, sampling module, and the output port of the described control module of multiple connection；Wherein, the input of described data selector can connect with any one Rhizoma Nelumbinis in the plurality of output port, and the input of described sampling module connects with the outfan Rhizoma Nelumbinis of described data selector, and the outfan of described sampling module connects with described control module Rhizoma Nelumbinis；The method includes: S10, data selector select the real output signal of one of them output port；S20, sampling module gather the real output signal of this output port selected by data selector；The result that sampling module is collected by S30, control module compares with the default output signal of this output port, it is judged that the output state of this output port is the most correct, if being judged as NO, then calibrates the real output signal of this output port according to judged result.
The method of the calibration output board card that the present invention provides, by using data selector, select the signal of an output port, sampling module is used to gather the real output signal of the output port that data selector is connected, and by control module, the result collected by sampling module i.e. gathers the result that real output signal obtains, the output signal output signal that this output port is preset i.e. estimated with control module, compare, if the result according to sampling module collection carries out calculating, the real output signal judging output port is identical with the output signal preset of control module or difference is within the scope of presetting, and judges that the output state of this output port is correct；If the output signal difference preset that the result according to sampling module collection carries out calculating the real output signal judging output port and control module exceedes default scope, judge that the output state of this output port is incorrect, and calibrate the real output signal of this output port according to judged result, it is achieved that the calibration to this output port.Therefore, if the real output signal by the output port selected by switch data selector, just can detect and calibrate the output state of different output ports, sampled by sampling module and be can interpolate that the output state of each output port by control module analytical sampling result, it is thus possible to the output state of each output channel is monitored in real time and is calibrated, result is more accurate, eliminate prior art carries out the operations such as line to each output channel and standard detecting devices, saves man power and material and improves calibration accuracy.
Accompanying drawing explanation
Below with reference to the accompanying drawings illustrate embodiments of the invention, the above and other objects, features and advantages of the present invention can be more readily understood that.Parts in accompanying drawing are intended merely to illustrate the principle of the present invention.In the accompanying drawings, same or similar technical characteristic or parts will use same or similar reference to represent.
Fig. 1 calibrates the circuit block diagram of the output board card that the method for output board card is suitable for by the application；
Fig. 2 is the enlarged drawing of an output port 400 among Fig. 1；
Fig. 3 is the flow chart that the application calibrates the first embodiment of the method for output board card；
Fig. 4 is the flow chart that the application calibrates the second embodiment of the method for output board card；
Fig. 5 is the flow chart that the application calibrates the 3rd embodiment of the method for output board card.
Detailed description of the invention
Embodiments of the invention are described with reference to the accompanying drawings.Element and feature described in the accompanying drawing of the present invention or a kind of embodiment can combine with the element shown in one or more other accompanying drawing or embodiment and feature.It should be noted that, for purposes of clarity, accompanying drawing and explanation eliminate unrelated to the invention, parts known to persons of ordinary skill in the art and the expression of process and description.
The basic fundamental design of the application is, sampling module is used to gather the real output signal of the output port selected by data selector, and result sampling module collected by control module, i.e. gather the result that real output signal obtains, the output signal output signal that this output port is preset estimated in other words with control module, compare, can interpolate that the output state of single output port is the most correct, it is thus possible to the output state of single output channel is monitored in real time and calibrated, improve calibration accuracy；Just different output ports can be calibrated by the real output signal of the output port selected by switch data selector, eliminate the operations such as each passage and standard detecting devices are carried out line, save man power and material.
Fig. 1 calibrates the circuit block diagram of the output board card that the method for output board card is suitable for by the application, and Fig. 2 is the enlarged drawing of an output port 400 among Fig. 1.By first describing the circuit block diagram of output board card, it is possible to contribute to understanding the embodiment of the method that the application calibrates output board card.
As it is shown in figure 1, output board card includes control module 100, data selector 200, sampling module 300, and the output port 400 of the described control module of multiple connection.
nullControl module 100 as shown in Figure 1，For FPGA (FieldProgrammableGateArray，Field programmable gate array) control module，Rhizoma Nelumbinis is connected to SDRAM (SynchronousDynamicrandomaccessmemory，Synchronous DRAM) 101 and PROM (ProgrammableRead-OnlyMemory，Programmable read only memory) 102，And by PCI (PeripheralComponentInterconnect，External equipment interconnects) bridge module 103 Rhizoma Nelumbinis is connected to PXI (PCIeXtensionsforInstrumentation，PCI towards instrument system extends) bus 104，And by DIO (digital in-output circuit) module 105 and MFIO (Multi-FunctionIO，Multifunctional input/output interface) module 106 Rhizoma Nelumbinis is connected to front panel interface 107.Wherein, about the SDRAM101 shown in Fig. 1, PROM102, PCI Bridge module 103, PXI bus 104, DIO module 105, MFIO module 106 and front panel interface 107, here is omitted.
Output board card as shown in Figure 1, include 8 groups of (GROUP0 GROUP7) output ports 400 altogether, each group is respectively provided with four output ports 400, each output port 400, includes the DAC-circuit 410 connect with control module 100 Rhizoma Nelumbinis respectively and drives module 420.Output board card as shown in Figure 1 includes 32 analog output channels.More specifically, understand refering to Fig. 2, described driving module 420, include voltage range switching 421, voltage driver 422, current driver 423, and output selection 424 respectively, wherein, using output to select 424 can select output signal is voltage signal or current signal, therefore, single control module 100 is used just can at random to configure output voltage signal and current signal for user, it is achieved that can optionally output voltage or output electric current.It addition, output board card as shown in Figure 1 provides higher load capacity, when 32 Channel Synchronous output, still ensure that the load capacity of driving electric current (voltage output)/500 ohm (electric current outputs) of up to 10mA, and multiple range can be provided selective, such as, 0～5V, 0～10V, 0～12V can be provided, +-5V, +-10V ,+-12V, 0～20mA, nine ranges of 0～24mA, 4～20mA.
Among Fig. 1 of the present embodiment, use DAC0, DAC1 ..., DAC31 represents the DAC-circuit of 32 output ports 400, is suitable for AO0, AO1 ..., AO31 represents the output signal of 32 output ports 400.
The data selector 200 of the present embodiment, for multi-channel data selector (multiplexer, MUX), more specifically, it is 32 to select 1 data selector, the input of data selector 200 can connect with any one Rhizoma Nelumbinis in multiple output ports 400, and data selector 200 selects a road output signal among 32 tunnel output signals of 32 output ports 400, as the output of its outfan.The input of the sampling module 300 of the present embodiment connects with the outfan Rhizoma Nelumbinis of data selector 200, and the outfan of sampling module 300 connects with control module 100 Rhizoma Nelumbinis.The sampling module 300 of the present embodiment can gather a road real output signal of the output port 400 selected by data selector 200.
More specifically, the sampling module 300 of the present embodiment includes temperature drift sampling with high precision resistance 310 and adc circuit 320.Owing to the real output signal of output port 400 can be current signal or voltage signal, therefore, if the real output signal of output port 400 is voltage signal, then real output signal is inputted adc circuit 320 and is gathered signal by adc circuit 320；If the real output signal of output port 400 is current signal, then real output signal is inputted low temp rising high precision sampling resistor 310, and voltage signal (i.e. the voltage difference at low temp rising high precision sampling resistor 310 two ends) the input adc circuit 320 at low temp rising high precision sampling resistor 310 two ends is gathered the magnitude of voltage relevant to the current signal of actual output by adc circuit 320.
Owing to control module 100 can preserve the default output signal of output port 400 (such as, each output port 400 default output voltage signal or value of current signal, if the output state of output port 400 is correct, then real output signal is identical with default output signal, or difference is within the scope of presetting), so being compared with default output signal by the result that sampling module 300 is collected, can interpolate that the output state of output port 400 is the most correct, and then calibrate the real output signal of this output port according to judged result and achieve the calibration to output port；Real output signal by the output port selected by switch data selector 200, it is possible to each output channel, monitors output state in real time and calibrates in real time.
Wherein, method to the calibration of output port 400, can be the ratio between the result collected according to sampling module 300 and the default output signal of output port 400, amendment voltage driver 422 and/or the gain of current driver 423, or the output valve of amendment control module 100.I.e. by the component parameters (being equivalent to revise the gain of output port 400) of amendment output port 400, or the signal (being equivalent to revise the input signal of output port 400) that amendment control module 100 exports to output port 400, and revise the real output signal of output port 400, thus realize the calibration to output port 400.
Fig. 3 is the flow chart that the application calibrates the first embodiment of the method for output board card.Method as shown in Figure 3, including step S10 as described below, S20, and S30:
S10, data selector select the real output signal of one of them output port.
Coordinating Fig. 1 and Fig. 2 to understand, the input of data selector 200 as shown in Figure 1 can be connected to output port 400, and the real output signal of one of them output port 400 can be selected to be sent to sampling module 300 by the outfan of data selector 200.
S20, sampling module gather the real output signal of this output port selected by data selector.
Step S20 of the present embodiment, specifically include: judge that real output signal is current signal or voltage signal, if real output signal is then inputted adc circuit by voltage signal, if real output signal is then inputted low temp rising high precision sampling resistor and the voltage signal of resistance is inputted adc circuit by current signal.
Fig. 1 and Fig. 2 is coordinated to understand, sampling module 300 can gather the real output signal of the output port 400 selected by data selector 200, owing to the real output signal of output port 400 can be current signal or voltage signal, sampling module 300 includes low temp rising high precision sampling resistor 310 and adc circuit 320.Therefore, among step S20, if the real output signal of output port 400 is voltage signal, then real output signal is inputted adc circuit 320 and is gathered signal by adc circuit 320；If the real output signal of output port 400 is current signal, then real output signal is inputted low temp rising high precision sampling resistor 310, and the voltage signal input adc circuit 320 of resistance 310 is gathered the magnitude of voltage relevant to the current signal of actual output by adc circuit 320.
The result that sampling module is collected by S30, control module compares with the default output signal of this output port, it is judged that the output state of this output port is the most correct, if being judged as NO, then calibrates the real output signal of this output port according to judged result；If it is preferred that be judged as YES, represent that the output state of this output port is correct, then return step S10 and selected another one not carry out the real output signal of the output port calibrated by data selector.
The output state judging this output port of step S30 of the present embodiment is the most correct, including: the result that sampling module is collected by control module and the default output signal of this output port use predetermined computing formula to obtain result of calculation, if result of calculation is in default scope, then the output state of this output port is correct, the otherwise output state mistake of this output port.
Fig. 1 and Fig. 2 is coordinated to understand, control module 100 can preserve the default output signal of output port 400 (such as, each output port 400 default output voltage signal or value of output current signal, if the output state of output port 400 is correct, then real output signal is identical with default output signal, or difference is within the scope of presetting), so being compared with default output signal by the result that sampling module 300 is collected, it is possible to judge that the output state of output port 400 is the most correct.More specifically, control module 100 can use predetermined computing formula, gather the collection result obtained by the real output signal of output port 400 (i.e. adc circuit 320 collects with sampling module 300, output port 400 virtual voltage output or the voltage at low temp rising high precision sampling resistor 310 two ends) and the default output signal of output port 400 be that parameter carries out computing, if result of calculation is in default scope, then the output state of output port 400 is correct, the otherwise output state mistake of output port 400.
The real output signal calibrating this output port according to judged result of step S30 of the present embodiment, specifically include: the ratio between the result and the default output signal of this output port that collect according to sampling module, amendment voltage driver and/or the gain of current driver, or the output valve of amendment control module.
Fig. 1 and Fig. 2 is coordinated to understand, if the real output signal of output port 400 is less than the output signal preset, then by improving voltage driver 422 and/or the gain of current driver 423, and/or, improve the output valve of control module 100, and improve the real output signal of output port 400；Similarly, if the real output signal of output port 400 is more than the output signal preset, then by reducing voltage driver 422 and/or the gain of current driver 423, and/or, reduce the output valve of control module 100, and reduce the real output signal of output port 400.
According to the embodiment shown in Fig. 3, it is possible to judge that the output state of single output port the most correctly and calibrates single output port, and improve calibration accuracy, eliminate the operations such as each passage and standard detecting devices are carried out line, save man power and material.
Fig. 4 is the flow chart that the application calibrates the second embodiment of the method for output board card.Second embodiment of the application as shown in Figure 4, including step S00 as follows, S10, S20, and S30:
S00, judge that sampling module is whether accurate, if being judged as YES, then perform step S10, otherwise after calibration output board card, perform step S10.Wherein, judge sampling module method the most accurately, it is the input using high accuracy source to connect described sampling module, uses the signal of the outfan of the circuit tester described sampling module of collection, judge that sampling module is the most accurate by the output valve in high accuracy source and the collection result of circuit tester.
S10, data selector select the real output signal of one of them output port.
S20, sampling module gather the real output signal of this output port selected by data selector.
The result that sampling module is collected by S30, control module compares with the default output signal of this output port, judge that the output state of this output port is the most correct, if being judged as NO, the real output signal of this output port is then calibrated according to judged result, if being judged as YES, then return step S10 and selected the real output signal of another one output port by data selector.
Step S10 of the present embodiment, S20, and S30 is roughly the same with first embodiment, here is omitted.
Step S00 of the present embodiment is by using high accuracy source by high-precision input signal input sample module, circuit tester is used to gather the signal of sampling module outfan, computing is carried out according to input signal and collection result, can interpolate that whether sampling module is accurately, if sampling module is accurate, then by performing step S10, S20, and S30 to detect the output state of each output port the most correct, first calibration output board card is further by performing step S10, S20, and S30 to detect the output state of each output port the most correct.
More specifically, the calibration output board card of step S00 of the present embodiment, can there be two kinds of basic methods, a kind of method is to calibrate output board card by calibration sampling module self, another kind of method is that the computing formula by adjusting control module is (i.e. among step S30, the result that sampling module is collected by control module and the default output signal of this output port use the step for that predetermined computing formula obtains result of calculation, the computing formula used), and offset the detection mistake the most precisely caused because of sampling module self, step S10 can be performed further, S20, and S30.
Therefore, the calibration output board card of the present embodiment step S00, specifically include: calibrate described low temp rising high precision sampling resistor, and/or, the parameter of described adc circuit is revised according to the output valve in high accuracy source and the collection result of circuit tester.
Or, the output state judging this output port in step S30 the most correctly includes: the real output signal that sampling module is collected by control module and the default output signal of this output port use predetermined computing formula to obtain result of calculation, if result of calculation is in default scope, then the output state of this output port is correct, otherwise in the case of the output state mistake of this output port, the calibration output board card of the present embodiment step S00, specifically include: according to output valve and the collection result of circuit tester in high accuracy source, the predetermined computing formula of amendment control module.By revising predetermined computing formula, and offsetting the detection mistake the most precisely caused because of sampling module self, the computing formula after using amendment performs step S30 can obtain testing result accurately.
According to the embodiment shown in Fig. 4, it is possible to judge that the output state of single output port the most correctly and calibrates single output port, and improve calibration accuracy, eliminate the operations such as each passage and standard detecting devices are carried out line, save man power and material.Further, by first calibrating output board card at sampling module in the case of the most accurately, it is possible to calibrate single output port more accurately.
Fig. 5 is the flow chart that the application calibrates the 3rd embodiment of the method for output board card state.3rd embodiment of the application as shown in Figure 5, including step S01 as follows, S10, S20, S30, and S40:
S01, all sampled points judged whether under present sample interval are all calibrated, if being judged as NO, then choose unregulated sampled point and perform step S10, if being judged as YES, then choose end value and the immediate sampling interval of current sampling point and choose this end value and be sampled point and perform step S10.
Coordinating the above explanation to Fig. 1 and Fig. 2, output board card can provide multiple selective range, therefore, the method of the calibration output board card of the present embodiment, including at multiple ranges (such as, 0～5V, 0～10V, 0～12V ,+-5V, +-10V, +-12V, 0～20mA, 0～24mA, 4～20mA) under, output board card detected and calibrate so that calibration result is more accurate.It is preferred that multiple sampled point can be selected, each sampled point calibrated each output port after a selected range.Such as, in the case of selected sampling interval (the most above-mentioned range) 0～10V, select at least one sampled point, such as, select 0V, 2.5V, 5V, 7.5V and 10V as sampled point, for each sampled point, all calibrate each output port by following steps S10-S40.
Coordinate below step S40, understand among step S01, if the sampled point (the most above-mentioned 7.5V or 10V) for present sample interval (the most above-mentioned 0～10V) have detected the output state of all of output port, the all sampled points then judged whether under present sample interval all carried out detection, if all carry out detection for all sampled points, reselect sampling interval (the most above-mentioned range) and sampled point, otherwise choose the sampled point not detected that present sample is interval, further, step S10 is performed.
S10, data selector select the real output signal of one of them output port.
S20, sampling module gather the real output signal of this output port selected by data selector.
The result that sampling module is collected by S30, control module compares with the default output signal of this output port, judge that the output state of this output port is the most correct, if being judged as NO, then calibrating the real output signal of this output port according to judged result and perform step S40, if being judged as YES, performing step S40.
All of output port is all calibrated by S40, the current sampling point judged whether under present sample interval, if being judged as NO, then performing step S10 makes data selector select one of them not carry out the output signal of the output port calibrated, if being judged as YES, then performs step S01.
Among step S40 of the present embodiment, if the current sampling point (the most above-mentioned 7.5V or 10V) for present sample interval (the most above-mentioned 0～10V) has calibrated all of output port, then perform step S01, it is judged that reselect sampling interval and sampled point or select the unregulated sampled point in present sample interval；If the current sampling point interval for present sample does not calibrate all of output port, then data selector is made to select the output signal of one of them output port not carrying out calibrating and return execution step S10.
By step S40 and the cooperation of step S01, it is possible on multiple ranges and at least one sampled point of each range, each output port of calibration output board card.
Step S10 of the present embodiment, S20, and S30 is roughly the same with first embodiment, here is omitted.
More specifically, step S01 of the present embodiment choose end value and the immediate sampling interval of current sampling point, specifically include: add up two absolute differences between end value and current sampling point of each sampling interval to be calibrated；Select the sampling interval that the end value of absolute difference minimum is corresponding.Such as, it is 0～5V in present sample interval, current sampling point is 5V, sampling interval to be calibrated is 0～10V, 0～12V, +-5V, +-10V, and+-12V, need to reselect sampling interval, then add up the absolute difference between two end values and the current sampling point 5V of each sampling interval to be calibrated, i.e. statistics end value 0V, 10V, 0V, 12V,-5V, 5V,-10V, 10V,-12V, and 12V, absolute difference respectively and between current sampling point 5V, wherein the absolute difference between the end value 5V and current sampling point 5V of sampling interval+-5V is minimum, then select sampling interval+-5V, and the 5V under selection+-5V sampling interval is sampled point.Owing to using such method, front and back between twice measurement, difference between the default output signal of output port is minimum, so the working environment of the element in circuit changes little, the especially electricity of capacitive element changes little, and measurement result is more accurate, and the waiting time required for measurement is relative the least, therefore, the accuracy that can either improve calibration operation also can improve the speed of operation of calibration operation.
Preferably, selecting sampling interval+-5V, and after the 5V under selection+-5V sampling interval is sampled point, cyclically perform step S10-S40, until-the 5V under selection+-5V sampling interval is sampled point and judges when needing to reselect sampling interval among step S01, sampling interval to be calibrated is 0～10V, 0～12V, +-10V, and+-12V, end points-the 10V of the end points 0V and sampling interval+-10V of sampling interval 0～10V, equal with the absolute difference between current sampling point-5V, then can select one of them sampling interval by the voltage jump amount of simulation calculated for subsequent.Such as, if selecting sampling interval 0～10V, then subsequently selected sampling interval is 10V to-10V ,-12V to 12V successively, and 12V to 0V；If selecting sampling interval+-10V, then subsequently selected sampling interval is 10V to 0V, 0V to 12V successively, and 12V to-12V, therefore, voltage jump amount follow-up in the case of selecting sampling interval+-10V is less, and the most more preferably selection+-10V is sampling interval.
According to the embodiment shown in Fig. 5, it is possible to judge that the output state of single output port the most correctly and calibrates single output port, and improve calibration accuracy, eliminate the operations such as each passage and standard detecting devices are carried out line, save man power and material.Further, by reasonably selecting in operating process the use of each sampling interval order, improve calibration accuracy and calibration efficiency.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the method calibrating output board card, it is adaptable to the output valve of calibration output board card, this output board card includes control module, data selector, sampling module, and the output port of the described control module of multiple connection；Wherein, the input of described data selector can connect with any one Rhizoma Nelumbinis in the plurality of output port, and the input of described sampling module connects with the outfan Rhizoma Nelumbinis of described data selector, and the outfan of described sampling module connects with described control module Rhizoma Nelumbinis；
The method includes:
S10, data selector select the real output signal of one of them output port；
S20, sampling module gather the real output signal of this output port selected by data selector；
The result that sampling module is collected by S30, control module compares with the default output signal of this output port, it is judged that the output state of this output port is the most correct, if being judged as NO, then calibrates the real output signal of this output port according to judged result.
Method the most according to claim 1, it is characterised in that the method further includes at the step before step S10:
High accuracy source is used to connect the input of described sampling module, use the signal of the outfan of the circuit tester described sampling module of collection, judge that sampling module is the most accurate by the output valve in high accuracy source and the collection result of circuit tester, if being judged as YES, then perform step S10, otherwise after calibration output board card, perform step S10.
Method the most according to claim 2, it is characterised in that described sampling module includes that low temp rising high precision sampling resistor and adc circuit, the most described calibration output board card specifically include:
Calibrate described low temp rising high precision sampling resistor, and/or, the parameter of described adc circuit is revised according to the output valve in high accuracy source and the collection result of circuit tester.
Method the most according to claim 2, it is characterised in that
The output state judging this output port of described step S30 is the most correct, specifically include: the real output signal that sampling module is collected by control module and the default output signal of this output port use predetermined computing formula to obtain result of calculation, if result of calculation is in default scope, then the output state of this output port is correct, the otherwise output state mistake of this output port；
Described calibration output board card specifically includes: according to output valve and the collection result of circuit tester in high accuracy source, the predetermined computing formula of amendment control module.
5. according to the method described in Claims 1-4 any claim, it is characterised in that described output port is respectively provided with voltage driver and/or current driver；
The real output signal calibrating this output port according to judged result of described step S30, specifically include: the ratio between the result and the default output signal of this output port that collect according to sampling module, amendment voltage driver and/or the gain of current driver, or the output valve of amendment control module.
Method the most according to claim 1, it is characterised in that the real output signal of this output port is current signal or voltage signal, described sampling module includes low temp rising high precision sampling resistor and adc circuit；
Described step S20 specifically includes:
Judge that real output signal is current signal or voltage signal, if real output signal is then inputted adc circuit by voltage signal, if real output signal is then inputted low temp rising high precision sampling resistor and the voltage signal of resistance is inputted adc circuit by current signal.
7. according to the method described in claim 1 or 6, it is characterised in that the output state judging this output port of described step S30 is the most correct, including:
The result that sampling module is collected by control module and the default output signal of this output port use predetermined computing formula to obtain result of calculation, if result of calculation is in default scope, then the output state of this output port is correct, the otherwise output state mistake of this output port.
8. according to the method described in claim 1 or 6, it is characterised in that the method further includes at step S01 performed before described step S10:
The all sampled points judged whether under present sample interval are all calibrated, if being judged as NO, then choose unregulated sampled point and perform step S10, if being judged as YES, then choose end value and the immediate sampling interval of current sampling point and choose this end value and be sampled point and perform step S10.
Method the most according to claim 8, it is characterised in that the method further includes at step S40 performed after described step S30:
All of output port is all calibrated by the current sampling point judged whether under present sample interval, if being judged as NO, then performing step S10 makes data selector select one of them not carry out the output signal of the output port calibrated, if being judged as YES, then performs step S01.
Method the most according to claim 8, it is characterised in that
Described end value and the immediate sampling interval of current sampling point chosen, specifically includes: add up two absolute differences between end value and current sampling point of each sampling interval to be detected；Select the sampling interval that the end value of absolute difference minimum is corresponding.
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| CN201510002282.3A CN105824000A (en) | 2015-01-04 | 2015-01-04 | Method for calibrating output board card |
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