CN108037367A - A kind of resistive conductor resistance rate full-automatic testing instrument of DC micro - Google Patents
A kind of resistive conductor resistance rate full-automatic testing instrument of DC micro Download PDFInfo
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- CN108037367A CN108037367A CN201711324323.6A CN201711324323A CN108037367A CN 108037367 A CN108037367 A CN 108037367A CN 201711324323 A CN201711324323 A CN 201711324323A CN 108037367 A CN108037367 A CN 108037367A
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- Prior art keywords
- touch
- screen
- micro
- acquisition module
- interface
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention belongs to test equipment technical field, discloses a kind of resistive conductor resistance rate full-automatic testing instrument of DC micro, is provided with touch-screen, the main interface for display output；It is connected with COM2 (RS485) interface of touch-screen, for gathering the first signal acquisition module and secondary signal acquisition module of signal；It is connected with COM1 (RS232) interface of touch-screen, is used for realization the mini-printer of printing function；It is connected with the USB interface of touch-screen, is used for realization the USB storage device of USB flash disk store function.The voltage and current precision of the resistive conductor resistance rate full-automatic testing instrument of DC micro of the present invention is higher, it can be achieved that carrying out the function of automatically calculating, output, USB flash disk storage and printing to the resistivity of the resistive conductor of DC micro (0 2000 μ Ω of Standard resistance range).
Description
Technical field
The invention belongs to test equipment technical field, more particularly to a kind of resistive conductor resistance rate of DC micro automatically to survey
Try instrument.
Background technology
Currently marketed resistivity tester is controlled using microcontroller more, liquid crystal display is shown and electronic component detection is come structure
Into system, when needing to measure Minitype resistance, since current source capability is larger, reusing microcontroller on this basis will need to solve
The larger interference problem that certainly high current source is brought, therefore monolithic processor controlled scheme is abandoned, the control program of technical grade becomes
It is preferred.Therefore the touch-screen PC control scheme in commercial Application instantly under the modbus communications protocol of comparative maturity is selected.
In conclusion problem existing in the prior art is：
Existing conductor resistance rate tester, the voltage and current precision of test are relatively low, it is impossible to realize measured conductor resistance value, lead
The calculating and output display of body resistivity；And the feature of USB flash disk storage and printing is poor.
The content of the invention
In view of the problems of the existing technology, the present invention provides a kind of resistive conductor resistance rate of DC micro automatically to survey
Try instrument.The present invention relates to key technology have touch screen technology, mechanics of communication, interfacing, sensor technology, electronic technology
Deng automation function is strong, easy to operate.Touch screen technology is related to configuration picture, the collection of signal, display and output, data
USB is stored and the output of data printing；The modbus communications protocol technologies of commercial Application maturation are used in terms of mechanics of communication；Serial ports
Technical elements are related to RS485 and RS232 interface, for connecting detection module and printer；In terms of electronic technology, electric current and voltage
Detection is using the module for meeting modbus communications protocol, for gathering the voltage data detected on miniature resistance.
The present invention is achieved in that a kind of resistive conductor resistance rate full-automatic testing instrument of DC micro includes：
Touch-screen, the main interface for display output；
It is connected with COM2 (RS485) interface of touch-screen, for gathering the first signal acquisition module and second of signal
Signal acquisition module；
It is connected with COM1 (RS232) interface of touch-screen, is used for realization the mini-printer of printing function；
It is connected with the USB interface of touch-screen, is used for realization the USB storage device of USB flash disk store function.
Further, the display interface of the touch-screen is equipped with resistance value and calculates interface and resistivity calculating interface.
Further, first signal acquisition module and secondary signal acquisition module are by current divider and measured conductor and directly
Flow current source forming circuit.
Further, first signal acquisition module and secondary signal acquisition module use isolation a/d converter as signal
Acquisition module.
Advantages of the present invention and good effect are：The voltage electricity of the resistive conductor resistance rate full-automatic testing instrument of the DC micro
It is higher to flow precision, by the loop voltage signal for gathering current divider DC ammeter signal and measured conductor, it is possible to achieve tested
The calculating and output display of conductor resistance value, and then can realize that the calculating of conductor resistance rate and output are shown, it can be achieved that to direct current
The resistivity of miniature resistive conductor (Standard resistance range 0-2000 μ Ω) carries out automatically calculating, output, USB flash disk storage and printing
Function.
Brief description of the drawings
Fig. 1 is the structural representation of the resistive conductor resistance rate full-automatic testing instrument of DC micro provided in an embodiment of the present invention
Figure；
Fig. 2 is that the resistance value of the resistive conductor resistance rate full-automatic testing instrument of DC micro provided in an embodiment of the present invention calculates
Interface；
Fig. 3 is that the resistivity of the resistive conductor resistance rate full-automatic testing instrument of DC micro provided in an embodiment of the present invention calculates
Interface；
In figure：1st, touch-screen；2nd, the first signal acquisition module；3rd, secondary signal acquisition module；4th, mini-printer；5、
USB storage device；6th, current divider；7th, DC current source；8th, measured conductor.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Below in conjunction with the accompanying drawings and specific embodiment is further described the application principle of the present invention.
Shown in Fig. 1, the resistive conductor resistance rate full-automatic testing instrument of DC micro provided in an embodiment of the present invention includes：
Touch-screen 1, the main interface for display output；
It is connected with COM2 (RS485) interface of touch-screen 1, for gathering the first signal acquisition module 2 and of signal
Binary signal acquisition module 3；
It is connected with COM1 (RS232) interface of touch-screen 1, is used for realization the mini-printer 4 of printing function；
It is connected with the USB interface of touch-screen 1, is used for realization the USB storage device 5 of USB flash disk store function.
As the preferred embodiment of the present invention, the display interface of the touch-screen 1 is equipped with resistance value and calculates interface and resistance
Rate calculates interface.
As the preferred embodiment of the present invention, first signal acquisition module 2 and secondary signal acquisition module 3 are by dividing
Stream device 6 and measured conductor 8 are formed into a loop with DC current source 7.
As the preferred embodiment of the present invention, first signal acquisition module 2 and secondary signal acquisition module 3 using every
From a/d converter as signal acquisition module.
The resistive conductor resistance rate full-automatic testing instrument of DC micro by the use of the Kunlun on-state TPC7062Tx models touch-screen as
Show the main interface exported, the input of data is realized by the interface, calculates output, USB flash disk storage and printing function.
1st, signal acquisition
The high current of DC current source 8 needs to flow through 7 shape of the current divider 6 of 200A/75mV and measured conductor before collection
Into circuit.
On current divider 6 DC ammeter export signal using Modbus-RTU agreements the first signal acquisition module 2 into
Row collection, the voltage signal at 7 both ends of measured conductor are acquired using the secondary signal acquisition module 3 of modbus-RTU agreements.
First signal acquisition module 2 and secondary signal acquisition module 3 are isolation a/d converter, and A/D changes digit as 16, voltage accuracy
Up to 5 grades.Wherein, 2 input range scope of the first signal acquisition module is 0-150mV, for gathering the 0- of the output of current divider 6
The signal U1 of 75mV.3 input range scope of secondary signal acquisition module is 0-5V, for gathering the 0- at 7 both ends of measured conductor
The voltage signal U2 of 2000mv.
First signal acquisition module 2 and secondary signal acquisition module 3 gather what signal was communicated by supporting Modbus-RTU
RS485 interfaces are connected to the COM2 (RS485) of touch-screen 1 to form communication network.Touch-screen 1 can be directly read by the network
The value of two paths of signals acquisition module is simultaneously stored in corresponding unit, for calculating the resistance value and resistivity of measured conductor.
2nd, input and display function
Design the picture of two touch-screens.Fig. 2 show resistance value and calculates interface.
The interface indicates that area and resistance value calculate output two parts and form by detected value.Detected value instruction area is used to indicate electricity
The voltage of stream source actual output current value and loop voltage, i.e. measured conductor both ends.The wherein actual output current value of current source
Need to be converted in touch-screen shell script according to the real output value of the supporting DC ammeter of current divider.
Reduction formula is：
I=K*U1 (1)
Wherein：
K:The diverting coefficient of current divider, this project use the current divider of 200A/75mV, so coefficient is 200/75
U1:The real output value of 1 detected value of module, the i.e. supporting DC ammeter of current divider
Resistance value output can be derived as following in upper figure：
R=U2/I (2)
Bring formula 1 into formula 2, the final calculation formula 3 of resistance value can be obtained
R=U2/ (K*U1) (3)
Interface is shown in Fig. 3, and resistivity calculates interface, and boundary is realized by " the resistivity computed push-buttom " clicked in interface 1
Switching between face.The interface calculates output two parts by conductor parameter input area and resistivity and forms.
The length of conductor parameter input requirements input conductor and section, can ask according to the calculation formula of following 4 resistance of formula
Solve resistivity formula 5.
R=ρ * (L/S) (4)
ρ=R* (S/L) (5)
The part calculates and is equally completed in the shell script of touch-screen.
3rd, USB flash disk store function
USB flash disk store function, to meet the preservation of calculation of measured data.The main USB that functional hardware connection is carried using touch-screen 1
Mouth extrapolation USB flash disk is realized.
Software aspects, call respective foot to realize USB flash disk originally by " storage " button clicked in " resistivity calculating interface "
The calling of store function.Script is mainly used！SaveData (group objects name) and！TransToUSB (see, during starting by group objects name
Between, the end time, exports state, tempo instructions, produce pattern, retention parameter) two functions come realize the deposit of group objects and
Export to USB flash disk.
4th, printing function
Printing function uses the mini-printer 5 of RS232 interface, can be with COM1 (RS232) interface of touch-screen 1
Connection, realizes printing function.In terms of hardware setting, it is necessary to set the printer baud rate and serial ports working method with reality
Now with the matching of touch-screen baud rate and working method.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (4)
- A kind of 1. resistive conductor resistance rate full-automatic testing instrument of DC micro, it is characterised in that the resistive conductor of DC micro Resistivity full-automatic testing instrument includes：Touch-screen, the main interface for display output；It is connected with the COM2 interfaces of touch-screen, for gathering the first signal acquisition module and secondary signal collection mould of signal Block；It is connected with the COM1 interfaces of touch-screen, is used for realization the mini-printer of printing function；It is connected with the USB interface of touch-screen, is used for realization the USB storage device of USB flash disk store function.
- 2. the resistive conductor resistance rate full-automatic testing instrument of DC micro as claimed in claim 1, it is characterised in that the touch-screen Display interface be equipped with resistance value and calculate interface and resistivity and calculate interface.
- 3. the resistive conductor resistance rate full-automatic testing instrument of DC micro as claimed in claim 1, it is characterised in that first letter Number acquisition module and secondary signal acquisition module pass through current divider and measured conductor and are formed into a loop with DC current source.
- 4. the resistive conductor resistance rate full-automatic testing instrument of DC micro as claimed in claim 1, it is characterised in that first letter Number acquisition module and secondary signal acquisition module are using isolation a/d converter as signal acquisition module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711324323.6A CN108037367A (en) | 2017-12-13 | 2017-12-13 | A kind of resistive conductor resistance rate full-automatic testing instrument of DC micro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711324323.6A CN108037367A (en) | 2017-12-13 | 2017-12-13 | A kind of resistive conductor resistance rate full-automatic testing instrument of DC micro |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108037367A true CN108037367A (en) | 2018-05-15 |
Family
ID=62102764
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711324323.6A Pending CN108037367A (en) | 2017-12-13 | 2017-12-13 | A kind of resistive conductor resistance rate full-automatic testing instrument of DC micro |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202362386U (en) * | 2011-11-07 | 2012-08-01 | 甘肃机电职业技术学院 | High power carbon electrode resistivity measuring device |
| CN202398542U (en) * | 2011-12-21 | 2012-08-29 | 韩华新能源（启东）有限公司 | Solar-energy original silicon chip full-automatic measurement and separation equipment |
| CN203981835U (en) * | 2014-07-04 | 2014-12-03 | 深圳市普兰电子技术有限公司 | A kind of Portable Automatic testing apparatus that is applicable to PCBA test |
| CN204789759U (en) * | 2015-07-22 | 2015-11-18 | 湖北三江航天万峰科技发展有限公司 | Automatic testing arrangement of small resistance of multichannel and insulation resistance |
| CN105259413A (en) * | 2015-11-02 | 2016-01-20 | 天津卡锐智科技发展有限公司 | Automatic tester for mini resistor of mobile phone |
| CN106443190A (en) * | 2016-09-25 | 2017-02-22 | 吉林炭素有限公司 | Small current measurement method for resistivity of large size graphite electrode |
-
2017
- 2017-12-13 CN CN201711324323.6A patent/CN108037367A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202362386U (en) * | 2011-11-07 | 2012-08-01 | 甘肃机电职业技术学院 | High power carbon electrode resistivity measuring device |
| CN202398542U (en) * | 2011-12-21 | 2012-08-29 | 韩华新能源（启东）有限公司 | Solar-energy original silicon chip full-automatic measurement and separation equipment |
| CN203981835U (en) * | 2014-07-04 | 2014-12-03 | 深圳市普兰电子技术有限公司 | A kind of Portable Automatic testing apparatus that is applicable to PCBA test |
| CN204789759U (en) * | 2015-07-22 | 2015-11-18 | 湖北三江航天万峰科技发展有限公司 | Automatic testing arrangement of small resistance of multichannel and insulation resistance |
| CN105259413A (en) * | 2015-11-02 | 2016-01-20 | 天津卡锐智科技发展有限公司 | Automatic tester for mini resistor of mobile phone |
| CN106443190A (en) * | 2016-09-25 | 2017-02-22 | 吉林炭素有限公司 | Small current measurement method for resistivity of large size graphite electrode |
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Application publication date: 20180515 |