CN102981056A - Self-verification automatic test system, device and method for on-resistance - Google Patents
Self-verification automatic test system, device and method for on-resistance Download PDFInfo
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- CN102981056A CN102981056A CN2012105730942A CN201210573094A CN102981056A CN 102981056 A CN102981056 A CN 102981056A CN 2012105730942 A CN2012105730942 A CN 2012105730942A CN 201210573094 A CN201210573094 A CN 201210573094A CN 102981056 A CN102981056 A CN 102981056A
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Abstract
The invention discloses a self-verification automatic test system, a device and a method for on-resistance. The system comprises program-controlled multi-channel selectors, a connecting cable, a self-verification component, a digital multimeter and a control module, wherein the program-controlled multi-channel selectors are used for controlling opening or closing of channels by turning on or off a switch; the connecting cable comprises an A end, a B end and a C end; the self-verification component is used for verifying the on-resistance of a tooling; the digital multimeter is used for sending a measured value of the on-resistance of the tooling and a measured value of the on-resistance of tested equipment to the control module; the digital multimeter is set in a four-wire resistance measurement mode by the control module; the control module controls the program-controlled multi-channel selectors to change the channels, starts testing the on-resistance of the tooling and receives the measured value of the on-resistance of the tooling sent by the digital multimeter; the control module controls the program-controlled multi-channel selectors to change the channels, starts testing the on-resistance of the tested equipment, and receives the measured value of the on-resistance of the tested equipment sent by the digital multimeter; and finally a true value of the on-resistance of the tested equipment is obtained.
Description
Technical field
The present invention relates to bus modularized instrument test field, particularly relate to a kind of band from conducting resistance Auto-Test System, the device and method of calibrating.
Background technology
In the prior art, the proving installation that need to carry out the product use of conducting resistance test mainly comprises: 1, when the port number of measurand is less, take directly the probe pen contact measurand of conducting resistance testing tool to be tested, manually change test channel, realize the test of whole passages; 2, when measurand has than hyperchannel, take one by one each channel signal to be drawn and scatter with cable, manually select test channel (cable end) and connect the conducting resistance testing tool and test; 3, when measurand has a lot of passage, adopt program control MUX, cable and automatic testing software to carry out the conducting resistance test.Because program control MUX, cable have internal resistance (conducting resistance), therefore need its internal resistance is regularly tested.Different program control MUX self conducting resistance is not all identical, need to again examine and determine self conducting resistance when using different selector switchs.In the prior art, be by manual mode the resistance of frock (system refers to program control MUX and stube cable) to be examined and determine, thereby so that testing efficiency is low.
Summary of the invention
The invention provides a kind of band from conducting resistance Auto-Test System, the device and method of calibrating, to solve the problem of by manual mode the resistance of frock being examined and determine the inefficiency that causes in the prior art.
The invention provides a kind of band from the conducting resistance Auto-Test System of calibrating, comprising: at least two program control MUX are used under the control of control module by opening of switch or being switched on or switched off of Closed control passage; Stube cable comprises A end, B end and C end, and when calibrating frock conducting resistance, the A end is used for connecting the self check parts, and when the conducting resistance of calibrating equipment under test, the A end is used for connecting equipment under test; The B end is connected with C and is connected respectively a program control MUX, and with four-wire ohm test mode two lead-in wires of common interface output from corresponding program control MUX, four lead-in wires that the B end is connected with C are used for connecting digital multimeter respectively for B end and C end; The self check parts are used for calibrating frock conducting resistance; Digital multimeter, link control module sends to control module for the frock conducting resistance measured value that will detect and the conducting resistance measured value of equipment under test; Control module, be used for operating the selection self-checking function according to the user, digital multimeter is set to the four-wire ohm metering system, controls program control MUX switching channel, begin to carry out the test of frock conducting resistance, and receive the frock conducting resistance measured value that digital multimeter sends; Operate the selection test function according to the user, digital multimeter is set to the four-wire ohm metering system, control program control MUX switching channel, begin to carry out the test of the conducting resistance of equipment under test, and receive the conducting resistance measured value of the equipment under test that digital multimeter sends, finally obtain the actual value of the conducting resistance of equipment under test.
Preferably, control module is further used for: in the situation of the self-resistance of ignoring the self check parts, the frock conducting resistance measured value that digital multimeter is sent is as the frock conduction resistance value; Otherwise, obtaining the self-resistance value of self check parts, the frock conducting resistance measured value that digital multimeter is sent deducts the difference that obtains after the self-resistance value of self check parts as the frock conduction resistance value.
Preferably, control module is further used for: the mode of getting average by the frock conduction resistance value that will repeatedly measure is determined final frock conduction resistance value.
Preferably, control module is further used for: the actual value that obtains the conducting resistance of equipment under test according to following formula; The conducting resistance measured value of the actual value=equipment under test of the conducting resistance of equipment under test-frock conduction resistance value.
Preferably, control module is further used for: point out the actual value of the conducting resistance of equipment under test not satisfy the information of the passage of precision index to the user.
The present invention also provides the conducting resistance automatic testing equipment of a kind of band from calibrating, comprising: at least two program control MUX are used under the control of computing machine by opening of switch or being switched on or switched off of Closed control passage; Stube cable comprises A end, B end and C end, and when calibrating frock conducting resistance, the A end is used for connecting the self check parts, and when the conducting resistance of calibrating equipment under test, the A end is used for connecting equipment under test; The B end is connected with C and is connected respectively a program control MUX, and with four-wire ohm test mode two lead-in wires of common interface output from corresponding program control MUX, four lead-in wires that the B end is connected with C are used for connecting digital multimeter respectively for B end and C end; The self check parts are used for calibrating frock conducting resistance.
The present invention also provides the conducting resistance automatic test approach of a kind of band from calibrating, be used for above-mentioned band from the conducting resistance automatic testing equipment of calibrating, comprise: operate the selection self-checking function according to the user, digital multimeter is set to the four-wire ohm metering system, control program control MUX switching channel, begin to carry out the test of frock conducting resistance, and receive the frock conducting resistance measured value that digital multimeter sends; Operate the selection test function according to the user, digital multimeter is set to the four-wire ohm metering system, control program control MUX switching channel, begin to carry out the test of the conducting resistance of equipment under test, and receive the conducting resistance measured value of the equipment under test that digital multimeter sends; Obtain the actual value of the conducting resistance of equipment under test.
Preferably, said method further comprises: in the situation of the self-resistance of ignoring the self check parts, the frock conducting resistance measured value that digital multimeter is sent is as the frock conduction resistance value; Otherwise, obtaining the self-resistance value of self check parts, the frock conducting resistance measured value that digital multimeter is sent deducts the difference that obtains after the self-resistance value of self check parts as the frock conduction resistance value.
Preferably, said method also comprises: the mode of getting average by the frock conduction resistance value that will repeatedly measure is determined final frock conduction resistance value; Point out the actual value of the conducting resistance of equipment under test not satisfy the information of the passage of precision index to the user.
Preferably, the actual value that obtains the conducting resistance of equipment under test specifically comprises: the actual value that obtains the conducting resistance of equipment under test according to following formula; The conducting resistance measured value of the actual value=equipment under test of the conducting resistance of equipment under test-frock conduction resistance value.
Beneficial effect of the present invention is as follows:
Technical scheme by the embodiment of the invention, solved the problem of by manual mode the resistance of frock being examined and determine the inefficiency that causes in the prior art, by connecting the self check parts, use automatic testing software (above-mentioned control module) that the frock conducting resistance is tested, avoided artificial test error and the manual problem of changing passage.Use this device that frock and module conducting resistance are tested, liberated human resources, saved production cost, improved testing efficiency.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by the specific embodiment of the present invention.
Description of drawings
By reading hereinafter detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing only is used for the purpose of preferred implementation is shown, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts with identical reference symbol.In the accompanying drawings:
Fig. 1 is that the band of the embodiment of the invention is from the structural representation of the conducting resistance Auto-Test System of calibrating;
Fig. 2 is that the band of the embodiment of the invention is from the detailed construction synoptic diagram of the conducting resistance Auto-Test System of calibrating;
Fig. 3 is the connection cable of the embodiment of the invention and the annexation synoptic diagram of digital multimeter and program control MUX;
Fig. 4 is that the band of the embodiment of the invention is from the synoptic diagram of the conducting resistance automatic testing equipment of calibrating;
Fig. 5 is that the band of the embodiment of the invention is from the process flow diagram of the conducting resistance automatic test approach of calibrating.
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in the accompanying drawing, yet should be appreciated that and to realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order to understand the disclosure more thoroughly that these embodiment are provided, and can with the scope of the present disclosure complete convey to those skilled in the art.
In order to solve the problem of by manual mode the resistance of frock being examined and determine the inefficiency that causes in the prior art, the invention provides a kind of band for the test of PXI bus switch class or cable from conducting resistance Auto-Test System, the device and method of calibrating, when frock calibrating exhaustion of effect or use the program control MUX of uncertified and cable during as frock, the self check parts can be docked with connection cable, select from examining and determine function the frock conducting resistance to be examined and determine.If frock resistance need not calibrating, then cable is directly docked the conducting resistance test that to carry out product with test product.The technical scheme of the embodiment of the invention adopts computer controlled automatic to carry out the calibrating of frock resistance and conducting resistance test, has improved testing efficiency.The frock resistance value measuring accuracy index of the embodiment of the invention is less than or equal to 50 milliohms, and can arrange whether carry out the test of frock self-resistance, guaranteed reliability and the convenience of frock calibrating, thereby improved the measuring accuracy of measurand conducting resistance.Be applicable to multiple Switch, the test of cable conducting resistance.
Below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, does not limit the present invention.
System embodiment
According to embodiments of the invention, the conducting resistance Auto-Test System of a kind of band from calibrating is provided, Fig. 1 is that the band of the embodiment of the invention is from the structural representation of the conducting resistance Auto-Test System of calibrating, as shown in Figure 1, comprise according to the band of the embodiment of the invention conducting resistance Auto-Test System from calibrating: program control MUX 100, stube cable 120, self check parts 140, digital multimeter 160 and control module 180 below are described in detail the modules of the embodiment of the invention.
Particularly, at least two program control MUX 100 are used under the control of control module 180 by opening of switch or being switched on or switched off of Closed control passage;
Particularly, in embodiments of the present invention, control module 180 is obtained the actual value of the conducting resistance of equipment under test according to following formula;
The conducting resistance measured value of the actual value=equipment under test of the conducting resistance of equipment under test-frock conduction resistance value.
In embodiments of the present invention, control module 180 is further used for: in the situation of the self-resistance of ignoring self check parts 140, the frock conducting resistance measured value that digital multimeter 160 is sent is as the frock conduction resistance value; Otherwise, obtaining the self-resistance value of self check parts 140, the frock conducting resistance measured value that digital multimeter 160 is sent deducts the difference that obtains after the self-resistance value of self check parts 140 as the frock conduction resistance value.
In addition, control module 180 can be determined final frock conduction resistance value by the mode that the frock conduction resistance value that will repeatedly measure is got average; And can point out the actual value of the conducting resistance of equipment under test not satisfy the information of the passage of precision index to the user.
Below in conjunction with accompanying drawing, the technique scheme of the embodiment of the invention is elaborated.
Fig. 2 is that the band of the embodiment of the invention is from the detailed construction synoptic diagram of the conducting resistance Auto-Test System of calibrating, as shown in Figure 2, comprise: computing machine (above-mentioned control module) 1, GPIB connection cable or netting twine 2, PXI controller 3, digital multimeter 4, connection cable 5, measurand 6, PXI cabinet 7, the first program control MUX 8, self check parts 9, the second program control MUX 10, surpass five class netting twines 11, adapter 12, wherein, in embodiments of the present invention, band comprises from the conducting resistance Auto-Test System of calibrating: computing machine (above-mentioned control module) 1, digital multimeter 4, connection cable 5, measurand 6, the first program control MUX 8, self check parts 9, and the second program control MUX 10.
The conducting resistance Auto-Test System that the band of the embodiment of the invention is examined and determine is certainly utilized the four-wire ohm test mode of digital multimeter, switches tested passage by the program control MUX of computer control, test conduction resistance.
Wherein, program control MUX is the multi-channel sampling switch module based on the PXI bus, connects computing machine by the PXI bus, and is controlled by computing machine.Program control MUX can be controlled the path by the closed or disconnection of sampling switch and connect, disconnects the automatic switchover of the row of channels of going forward side by side.
Connection cable has 3 plugs, and an end is A, and the other end is divided into B and C.Fig. 3 is the connection cable of the embodiment of the invention and the annexation synoptic diagram of digital multimeter and program control MUX, as shown in Figure 3, A connects measurand or self check parts, B connects program control MUX 1, C connects program control MUX 2, and B and C are respectively with the common interface output lead of four line test modes from sampling switch.
When carrying out the test of frock conducting resistance, program control MUX is inserted the PXI cabinet, the A end of cable is connected with the self check parts, the B end of cable is connected with program control MUX 1, the C end of cable is connected with program control MUX 2, the four line test leads that B is connected with C connect digital multimeter, and digital multimeter connects computing machine with RCIs such as gpib bus.
In actual applications, owing to frock module, connection cable itself have resistance, can exert an influence to test result, therefore need to the resistance of self be detected.By the mode that adds measuring resistance (self check parts) at proving installation and carry out the test result contrast, determine the resistance of device self.
After selecting self-checking function, the Lookup protocol digital multimeter is the four-wire ohm metering system, controls 2 program control MUX switching channels, begins to carry out frock conducting resistance (R
g) test and data are preserved automatically.The information that the ejection self check was finished after self check was finished.Frock resistance precision index can reach 50 milliohms, improved the accuracy of test product conducting resistance test, is particularly useful for conducting resistance less than 5 ohm product to be measured.When the number of channels of measurand surpasses the number of channels of 1 program control MUX, can expand the quantity of MUX, to realize the passage expansion.
In actual applications, because the self check parts also have resistance value, therefore, and the resistance that needs use the four-wire ohm test mode of digital multimeter directly to test the self check parts, the resistance of testing again the self check parts, both differences are the frock conducting resistance.Can take repeatedly to test the mode such as average from the frock conducting resistance of calibrating determines.After the frock conducting resistance of installing self is determined, can removal self check parts, carry out proper testing.
When measurand being carried out passage conducting resistance (R) test, program control MUX links to each other with measurand by stube cable; After selecting test function, the program control MUX switching channel of computer control, and be the four-wire ohm function testing mode by Long-distance Control port control figure multimeter, begin to carry out the test of passage conducting resistance, and will survey resistance value (R
0) be recorded in the test chart.According to formula R=R
0-R
gCalculate each passage conduction resistance value of measurand, and the R value is saved in the test chart, the passage that conduction resistance value does not satisfy precision index will show defective information with red text.
Need to prove that the embodiment of the invention can be applied to the equipment of PXI bus, be not limited in the PXI bus apparatus.
Device embodiment
According to embodiments of the invention, the conducting resistance automatic testing equipment of a kind of band from calibrating is provided, Fig. 4 is that the band of the embodiment of the invention is from the synoptic diagram of the conducting resistance automatic testing equipment of calibrating, as shown in Figure 4, band according to the embodiment of the invention comprises from the conducting resistance automatic testing equipment of calibrating: program control MUX 400, stube cable 420 and self check parts 440, below in conjunction with accompanying drawing, the technique scheme of the embodiment of the invention is elaborated.
Particularly, at least two program control MUX 400 are used under the control of computing machine by opening of switch or being switched on or switched off of Closed control passage;
In embodiments of the present invention, band can be understood according to the associated description among the said system embodiment from the conducting resistance automatic testing equipment of calibrating, does not repeat them here.
Embodiment of the method
According to embodiments of the invention, the conducting resistance automatic test approach of a kind of band from calibrating is provided, be used for above-mentioned band from the conducting resistance automatic testing equipment of calibrating, Fig. 5 is that the band of the embodiment of the invention is from the process flow diagram of the conducting resistance automatic test approach of calibrating, as shown in Figure 5, the band according to the embodiment of the invention comprises following processing from the conducting resistance automatic test approach of calibrating:
Step 501, operate the selection self-checking function according to the user, digital multimeter is set to the four-wire ohm metering system, controls program control MUX switching channel, begin to carry out the test of frock conducting resistance, and receive the frock conducting resistance measured value that digital multimeter sends;
Step 502, operate the selection test function according to the user, digital multimeter is set to the four-wire ohm metering system, controls program control MUX switching channel, begin to carry out the test of the conducting resistance of equipment under test, and receive the conducting resistance measured value of the equipment under test that digital multimeter sends;
Preferably, in actual applications, in the situation of the self-resistance of ignoring the self check parts, the frock conducting resistance measured value that digital multimeter can be sent is as the frock conduction resistance value; Otherwise, obtaining the self-resistance value of self check parts, the frock conducting resistance measured value that digital multimeter is sent deducts the difference that obtains after the self-resistance value of self check parts as the frock conduction resistance value.
In addition, can determine final frock conduction resistance value by the mode that the frock conduction resistance value that will repeatedly measure is got average;
Step 503 is obtained the actual value of the conducting resistance of equipment under test.
Particularly, in step 503, can obtain according to following formula the actual value of the conducting resistance of equipment under test;
The conducting resistance measured value of the actual value=equipment under test of the conducting resistance of equipment under test-frock conduction resistance value.
In embodiments of the present invention, can point out the actual value of the conducting resistance of equipment under test not satisfy the information of the passage of precision index to the user.
Below in conjunction with accompanying drawing, the technique scheme of the embodiment of the invention is elaborated.
Fig. 2 is that the band of the embodiment of the invention is from the detailed construction synoptic diagram of the conducting resistance Auto-Test System of calibrating, as shown in Figure 2, comprise: computing machine (above-mentioned control module) 1, GPIB connection cable or netting twine 2, PXI controller 3, digital multimeter 4, connection cable 5, measurand 6, PXI cabinet 7, the first program control MUX 8, self check parts 9, the second program control MUX 10, surpass five class netting twines 11, adapter 12, wherein, in embodiments of the present invention, band comprises from the conducting resistance Auto-Test System of calibrating: computing machine (above-mentioned control module) 1, digital multimeter 4, connection cable 5, measurand 6, the first program control MUX 8, self check parts 9, and the second program control MUX 10.
The conducting resistance Auto-Test System that the band of the embodiment of the invention is examined and determine is certainly utilized the four-wire ohm test mode of digital multimeter, switches tested passage by the program control MUX of computer control, test conduction resistance.
Wherein, program control MUX is the multi-channel sampling switch module based on the PXI bus, connects computing machine by the PXI bus, and is controlled by computing machine.Program control MUX can be controlled the path by the closed or disconnection of sampling switch and connect, disconnects the automatic switchover of the row of channels of going forward side by side.
Connection cable has 3 plugs, and an end is A, and the other end is divided into B and C.Fig. 3 is the connection cable of the embodiment of the invention and the annexation synoptic diagram of digital multimeter and program control MUX, as shown in Figure 3, A connects measurand or self check parts, B connects program control MUX 1, C connects program control MUX 2, and B and C are respectively with the common interface output lead of four line test modes from sampling switch.
When carrying out the test of frock conducting resistance, program control MUX is inserted the PXI cabinet, the A end of cable is connected with the self check parts, the B end of cable is connected with program control MUX 1, the C end of cable is connected with program control MUX 2, the four line test leads that B is connected with C connect digital multimeter, and digital multimeter connects computing machine with RCIs such as gpib bus.
In actual applications, owing to frock module, connection cable itself have resistance, can exert an influence to test result, therefore need to the resistance of self be detected.By the mode that adds measuring resistance (self check parts) at proving installation and carry out the test result contrast, determine the resistance of device self.
After selecting self-checking function, the Lookup protocol digital multimeter is the four-wire ohm metering system, controls 2 program control MUX switching channels, begins to carry out frock conducting resistance (R
g) test and data are preserved automatically.The information that the ejection self check was finished after self check was finished.Frock resistance precision index can reach 50 milliohms, improved the accuracy of test product conducting resistance test, is particularly useful for conducting resistance less than 5 ohm product to be measured.When the number of channels of measurand surpasses the number of channels of 1 program control MUX, can expand the quantity of MUX, to realize the passage expansion.
In actual applications, because the self check parts also have resistance value, therefore, and the resistance that needs use the four-wire ohm test mode of digital multimeter directly to test the self check parts, the resistance of testing again the self check parts, both differences are the frock conducting resistance.Can take repeatedly to test the mode such as average from the frock conducting resistance of calibrating determines.After the frock conducting resistance of installing self is determined, can removal self check parts, carry out proper testing.
When measurand being carried out passage conducting resistance (R) test, program control MUX links to each other with measurand by stube cable; After selecting test function, the program control MUX switching channel of computer control, and be the four-wire ohm function testing mode by Long-distance Control port control figure multimeter, begin to carry out the test of passage conducting resistance, and will survey resistance value (R
0) be recorded in the test chart.According to formula R=R
0-R
gCalculate each passage conduction resistance value of measurand, and the R value is saved in the test chart, the passage that conduction resistance value does not satisfy precision index will show defective information with red text.
Need to prove that the embodiment of the invention can be applied to the equipment of PXI bus, be not limited in the PXI bus apparatus.
In sum, technical scheme by means of the embodiment of the invention, technical scheme by the embodiment of the invention, solved the problem of by manual mode the resistance of frock being examined and determine the inefficiency that causes in the prior art, by connecting the self check parts, use automatic testing software (above-mentioned control module) that the frock conducting resistance is tested, avoided artificial test error and the manual problem of changing passage.Use this device that frock and module conducting resistance are tested, liberated human resources, saved production cost, improved testing efficiency.
Intrinsic not relevant with any certain computer, virtual system or miscellaneous equipment with demonstration at this algorithm that provides.Various general-purpose systems also can be with using based on the teaching at this.According to top description, it is apparent constructing the desired structure of this type systematic.In addition, the present invention is not also for any certain programmed language.Should be understood that and to utilize various programming languages to realize content of the present invention described here, and the top description that language-specific is done is in order to disclose preferred forms of the present invention.
In the instructions that provides herein, a large amount of details have been described.Yet, can understand, embodiments of the invention can be put into practice in the situation of these details not having.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand one or more in each inventive aspect, in the description to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes in the above.Yet the method for the disclosure should be construed to the following intention of reflection: namely the present invention for required protection requires the more feature of feature clearly put down in writing than institute in each claim.Or rather, as following claims reflected, inventive aspect was to be less than all features of the disclosed single embodiment in front.Therefore, follow claims of embodiment and incorporate clearly thus this embodiment into, wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are appreciated that and can adaptively change and they are arranged in one or more equipment different from this embodiment the module in the equipment among the embodiment.Can be combined into a module or unit or assembly to the module among the embodiment or unit or assembly, and can be divided into a plurality of submodules or subelement or sub-component to them in addition.In such feature and/or process or unit at least some are mutually repelling, and can adopt any combination to disclosed all features in this instructions (comprising claim, summary and the accompanying drawing followed) and so all processes or the unit of disclosed any method or equipment make up.Unless in addition clearly statement, disclosed each feature can be by providing identical, being equal to or the alternative features of similar purpose replaces in this instructions (comprising claim, summary and the accompanying drawing followed).
In addition, those skilled in the art can understand, although embodiment more described herein comprise some feature rather than further feature included among other embodiment, the combination of the feature of different embodiment means and is within the scope of the present invention and forms different embodiment.For example, in the following claims, the one of any of embodiment required for protection can be used with array mode arbitrarily.
All parts embodiment of the present invention can realize with hardware, perhaps realizes with the software module of moving at one or more processor, and perhaps the combination with them realizes.It will be understood by those of skill in the art that and to use in practice microprocessor or digital signal processor (DSP) to realize according to the band of the embodiment of the invention from the conducting resistance Auto-Test System of calibrating and band some or all some or the repertoire of parts in the conducting resistance automatic testing equipment of calibrating.The present invention can also be embodied as be used to part or all equipment or the device program (for example, computer program and computer program) of carrying out method as described herein.Such realization program of the present invention can be stored on the computer-readable medium, perhaps can have the form of one or more signal.Such signal can be downloaded from internet website and obtain, and perhaps provides at carrier signal, perhaps provides with any other form.
It should be noted above-described embodiment the present invention will be described rather than limit the invention, and those skilled in the art can design alternative embodiment in the situation of the scope that does not break away from claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed in element or step in the claim.Being positioned at word " " before the element or " one " does not get rid of and has a plurality of such elements.The present invention can realize by means of the hardware that includes some different elements and by means of the computing machine of suitably programming.In having enumerated the unit claim of some devices, several in these devices can be to come imbody by same hardware branch.The use of word first, second and C grade does not represent any order.Can be title with these word explanations.
Claims (10)
1. a band is characterized in that from the conducting resistance Auto-Test System of examining and determine, and comprising:
At least two program control MUX are used under the control of control module by opening of switch or being switched on or switched off of Closed control passage;
Stube cable comprises A end, B end and C end, and when calibrating frock conducting resistance, described A end is used for connecting described self check parts, and when the conducting resistance of calibrating equipment under test, described A end is used for connecting described equipment under test; Described B end and the C of being connected hold and connect respectively a program control MUX, and, with four-wire ohm test mode two lead-in wires of common interface output from corresponding program control MUX, four lead-in wires that described B end and the C of being connected hold are for connecting described digital multimeter respectively for described B end and described C end;
The self check parts are used for examining and determine described frock conducting resistance;
Digital multimeter, link control module sends to described control module for the described frock conducting resistance measured value that will detect and the conducting resistance measured value of described equipment under test;
Control module, be used for operating the selection self-checking function according to the user, described digital multimeter is set to the four-wire ohm metering system, control described program control MUX switching channel, begin to carry out the test of described frock conducting resistance, and receive the described frock conducting resistance measured value that described digital multimeter sends; Operate the selection test function according to the user, described digital multimeter is set to the four-wire ohm metering system, control described program control MUX switching channel, begin to carry out the test of the conducting resistance of described equipment under test, and receive the conducting resistance measured value of the described equipment under test that described digital multimeter sends, finally obtain the actual value of the conducting resistance of equipment under test.
2. the system as claimed in claim 1 is characterized in that, described control module is further used for:
In the situation of the self-resistance of ignoring described self check parts, the described frock conducting resistance measured value that described digital multimeter is sent is as the frock conduction resistance value; Otherwise, obtaining the self-resistance value of described self check parts, the described frock conducting resistance measured value that described digital multimeter is sent deducts the difference that obtains after the self-resistance value of described self check parts as described frock conduction resistance value.
3. system as claimed in claim 2 is characterized in that, described control module is further used for:
Determine final frock conduction resistance value by the mode that the described frock conduction resistance value that will repeatedly measure is got average.
4. system as claimed in claim 2 or claim 3 is characterized in that described control module is further used for:
Obtain the actual value of the conducting resistance of equipment under test according to following formula;
The conducting resistance measured value of the actual value=equipment under test of the conducting resistance of equipment under test-frock conduction resistance value.
5. will go to 1 described system such as right, it is characterized in that, described control module is further used for: point out the actual value of the conducting resistance of equipment under test not satisfy the information of the passage of precision index to the user.
6. a band is characterized in that from the conducting resistance automatic testing equipment of examining and determine, and comprising:
At least two program control MUX are used under the control of computing machine by opening of switch or being switched on or switched off of Closed control passage;
Stube cable comprises A end, B end and C end, and when calibrating frock conducting resistance, described A end is used for connecting described self check parts, and when the conducting resistance of calibrating equipment under test, described A end is used for connecting described equipment under test; Described B end and the C of being connected hold and connect respectively a program control MUX, and, with four-wire ohm test mode two lead-in wires of common interface output from corresponding program control MUX, four lead-in wires that described B end and the C of being connected hold are for connecting described digital multimeter respectively for described B end and described C end;
The self check parts are used for examining and determine described frock conducting resistance.
7. a band is used for band as claimed in claim 6 from the conducting resistance automatic testing equipment of calibrating from the conducting resistance automatic test approach of examining and determine, and it is characterized in that, comprising:
Operate the selection self-checking function according to the user, described digital multimeter is set to the four-wire ohm metering system, control described program control MUX switching channel, begin to carry out the test of described frock conducting resistance, and receive the described frock conducting resistance measured value that described digital multimeter sends;
Operate the selection test function according to the user, described digital multimeter is set to the four-wire ohm metering system, control described program control MUX switching channel, begin to carry out the test of the conducting resistance of described equipment under test, and receive the conducting resistance measured value of the described equipment under test that described digital multimeter sends;
Obtain the actual value of the conducting resistance of equipment under test.
8. method as claimed in claim 7 is characterized in that, described method further comprises:
In the situation of the self-resistance of ignoring described self check parts, the described frock conducting resistance measured value that described digital multimeter is sent is as the frock conduction resistance value; Otherwise, obtaining the self-resistance value of described self check parts, the described frock conducting resistance measured value that described digital multimeter is sent deducts the difference that obtains after the self-resistance value of described self check parts as described frock conduction resistance value.
9. method as claimed in claim 8 is characterized in that, described method also comprises:
Determine final frock conduction resistance value by the mode that the described frock conduction resistance value that will repeatedly measure is got average;
Point out the actual value of the conducting resistance of equipment under test not satisfy the information of the passage of precision index to the user.
10. method as claimed in claim 8 or 9 is characterized in that the actual value that obtains the conducting resistance of equipment under test specifically comprises:
Obtain the actual value of the conducting resistance of equipment under test according to following formula;
The conducting resistance measured value of the actual value=equipment under test of the conducting resistance of equipment under test-frock conduction resistance value.
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