CN2833714Y - Multi-path programmed switch - Google Patents
Multi-path programmed switch Download PDFInfo
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- CN2833714Y CN2833714Y CN 200520079588 CN200520079588U CN2833714Y CN 2833714 Y CN2833714 Y CN 2833714Y CN 200520079588 CN200520079588 CN 200520079588 CN 200520079588 U CN200520079588 U CN 200520079588U CN 2833714 Y CN2833714 Y CN 2833714Y
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Abstract
The utility model provides a multi-path programmed switch for a multifunctional calibration source digital multimeter for automatic check, test and calibration. The utility model comprises an epistatic computer, a communication interface, a CPU main control part, an executing part, an output/input part and a power supply part, wherein the epistatic computer runs system software and transmits control commands; the main control part receives the control commands from the epistatic computer through the communication interface, completes the interpretation of the commands and carries out various controls on a multi-path switch according to the result of the interpreted commands. An executing plate receives control signals of a main control plate, causes the attracting of a corresponding relay, switches input to an output terminal, and realizes the automatic measure, check and calibration of instruments and meters, the output of standard equipment, as well as the automatic switch of each of the input functions of a plurality of calibration equipment to be checked. The utility model has the advantages of compact structure, multiple paths, programmed control, wide measuring range, large capacity, low power consumption, quick response speed, small input/output electric potential difference and small on-resistance.
Description
Technical field
The utility model relates to a kind of programmed switch, relates in particular to a kind of multichannel programmed switch that is used for digital multimeter automatic Verification, test, calibration system.
Background technology
Continuous development and informationalized fast development along with scientific and technological level, the pin-point accuracy digital instrument that has GPIB (IEEE-488) and RS-232C interface is widely used in scientific research, in the industry-by-industry robotization control detection, therefore, the calibrating of digital instrument, calibration and debugging work load are very big, carrying out the digital multimeter automatic calibration, test, in the calibration process, because the lead-out terminal of the multi-functional calibration source of existing standard and the input terminal of digital multimeter are not one to one, necessary manual operation incoming line when function is changed, can only reach semi-automatic, one time one, can not many detect simultaneously, calibration, labour intensity is big, inefficiency; Simultaneously because manual human factor, influenced the accuracy of detection, calibration, also be unfavorable for being worth the protection of expensive standard device.
The development of relevant multichannel programmed switch, domestic have a bibliographical information, " program control multi-way switch " as University Of Shantou's computer center development, this switch is furnished with double address and only listens the IEEE-488 interface, available system controlled by computer, also be convenient to manual operation, but according to the contact performance of used relay, its capacity only is 30VA; The innovative product of University Of Shantou has increased the multi-way switch of one group of 8 passage newly, is generally used for being elected to be voltage to be measured, has added a negative-phase relay, so that eliminate the influence of spuious electromotive force in measurement.External relevant bibliographical information, introduce a kind of computer testing operating system (CBTOS) as United States Patent (USP) 6134674, this system includes test procedure and graphic user interface, can make non-software development user edit a test procedure so that examined and determine or calibration equipment is calibrated various; United States Patent (USP) 5091657 is a kind of high speed, big electric current, has the multi-way switch circuit of JFET switch, and the gate electrode of JFET is connected on the control circuit of switch, and its input and output voltage is about 10 μ V; Jap.P. is clear-and 60-85378 is a kind of automated calibration system of digital multimeter, has the graphic presentation interface, can select the calibration micro actuator according to voltage error, shortens the alignment time.Though the above respectively has advantage, all fail to solve fully the problem that prior art exists, and complex structure, measurement range is narrow, capacity is little, power consumption is big, response speed is slow, input and output electric potential difference and conducting resistance are big.There is no both at home and abroad and the identical bibliographical information of the utility model.
Summary of the invention
The purpose of this utility model provides a kind of multichannel programmed switch that multi-functional calibration source digital multimeter detects automatically, measures, calibrates that is used for.
Multichannel programmed switch of the present utility model comprises host computer, communication interface, main control part, operating part, output importation and power unit.Described main control part is CPU, and its input end is connected with host computer by communication interface, and its output terminal is connected with operating part.Described operating part is a relay, and it is connected with the input and output terminal of input.
Described main control part is a single-chip microcomputer.
Described communication interface is gpib interface or RS232 interface.
There are a plurality of IO channel described output importation, and optional passage is as input channel, and rest channels is an output channel.
There are 12 IO channel described output importation, and each passage has 6 input and output terminals, and input and output terminal is realized the input/output function of voltage, electric current and resistance by combination.
Described CPU main control part is connected with operating part with optocoupler through electronic switch.
Described power unit is the two-way switch power supply, and one the road supplies with the CPU main control part, and one the road supplies with the execution relay.
Know-why of the present utility model:
Host computer operational system software, transmitting control commands, communication interface transmission control command; The CPU master control borad mainly by the control command of communication interface reception from host computer, is finished the explanation to order, again according to the command interpretation result, implements the various controls to multi-way switch; Carry out the control signal that plate receives master control borad, make the corresponding relays adhesive, input is switched to lead-out terminal, realize output and many automatic switchovers of being examined and determine each input function of correcting device of instrument and meter automatic gauge calibrating and calibration, standard device.
The utility model compared with prior art has the following advantages:
Simple for structure, multichannel, program control, measurement range is wide, capacity is big, low in energy consumption, response speed fast, input and output electric potential difference and conducting resistance are little; Really realized full-automatic calibrating, test and the calibration of many digital multimeters, greatly improved work efficiency, reduced labor intensity; Overcome artifical influence factor fully, the accuracy height helps the standard device of conservation value costliness better, prolongs its serviceable life.
Description of drawings
Fig. 1 is a multichannel programmed switch theory diagram
Fig. 2 is a multichannel programmed switch IO channel synoptic diagram
Embodiment
A kind of multichannel programmed switch that is used for multi-functional calibration source digital multimeter automatic Verification, test, calibration system, comprise host computer, communication interface, CPU main control part, operating part, output importation and power unit, wherein the CPU main control part is 8 W78b52 single-chip microcomputers, its input end is connected with host computer by gpib interface or RS232 interface, and its output terminal is connected with operating part with optocoupler through electronic switch; Operating part is a relay, and it directly is connected (with reference to Fig. 1) with input; There are 12 IO channel the output importation, and each passage has 6 input and output terminal: V
H, V
L, A
H, S
H, S
L, G, the combination of 6 input and output terminals realizes the input/output function (with reference to Fig. 2) of voltage, electric current and resistance: V
H-V
LHigh-end and the low side of input and output of forming 1 road voltage or electric current or two line resistances; A
H-V
LHigh-end and the low side of input and output of forming 1 road electric current; S
H-S
LHigh-end and the low side of sampling input and output of forming 1 road electric current or two line resistances; V
H-V
LAnd S
H-S
LHigh-end and the low side of input and output of forming 1 road four-wire ohm, G is the protection terminal.Optional passage is as input channel, and all the other 11 passages are output channel just.Power unit is the two-way switch power supply, and one the road supplies with the CPU main control part, and one the road supplies with the execution relay, and independently use on each road, thereby load capacity is strong, can continue reliably working, has guaranteed the work of multichannel programmed switch continous-stable.
Its course of work is as follows: after the multichannel programmed switch started, each interface circuit of initialization and self check: relay closes tripping again, pilot lamp were once glittering, enter the state of waiting for gpib interface or the instruction of RS232 interface host computer.Host computer is entering switch control interface, left mouse button click to be selected a kind of in voltage U, electric current A, two line resistances and the four-wire ohm four big functions, according to the requirement of system's control, select and click corresponding channel switch button again, realize the access and the disconnection of multi-way switch.By clicking total zero clearing the multichannel programmed switch is resetted.Return by click, host computer withdraws from the control to the multichannel programmed switch.
Its key technical indexes:
1, IO channel can be passed through 0～1100V, the combined-voltage of 10Hz～1MHz; 0～3A, 10Hz～10kHz ac and dc current; The resistance of 1 Ω～1G Ω.
Electric potential difference≤0.1uV between corresponding terminal when 2, any two passages are connected, uncertainty 0.05uV, k=2, conducting resistance≤0.1 Ω, uncertainty 0.2m Ω, k=2.
3, insulation resistance＞10M Ω, dielectric strength 1.5kV.
4, condition of work: supply voltage (90～220) V, (40～60) Hz; Environment temperature (10～30) ℃; Relative humidity＜90%.
5, power consumption＜20W.
6, weight＜10kg.
Claims (7)
1, a kind of multichannel programmed switch, comprise host computer, communication interface, main control part, operating part, output importation and power unit, it is characterized in that: described main control part is CPU, its input end is connected with host computer by communication interface, and its output terminal is connected with operating part; Described operating part is a relay, and it is connected with the input and output terminal of input.
2, multichannel programmed switch as claimed in claim 1 is characterized in that: described main control part is a single-chip microcomputer.
3, multichannel programmed switch as claimed in claim 1 is characterized in that: described communication interface is gpib interface or RS232 interface.
4, multichannel programmed switch as claimed in claim 1 is characterized in that: there are a plurality of IO channel described output importation, and optional passage is as input channel, and rest channels is an output channel.
5, multichannel programmed switch as claimed in claim 4, it is characterized in that: there are 12 IO channel described output importation, each passage has 6 input and output terminals, and input and output terminal is realized the input/output function of voltage, electric current and resistance by combination.
6, multichannel programmed switch as claimed in claim 1 is characterized in that: described CPU main control part is connected with operating part with optocoupler through electronic switch.
7, multichannel programmed switch as claimed in claim 1 is characterized in that: described power unit is the two-way switch power supply, and one the road supplies with the CPU main control part, and one the road supplies with the execution relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079588 CN2833714Y (en) | 2005-10-19 | 2005-10-19 | Multi-path programmed switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079588 CN2833714Y (en) | 2005-10-19 | 2005-10-19 | Multi-path programmed switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2833714Y true CN2833714Y (en) | 2006-11-01 |
Family
ID=37198025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520079588 Expired - Fee Related CN2833714Y (en) | 2005-10-19 | 2005-10-19 | Multi-path programmed switch |
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| Country | Link |
|---|---|
| CN (1) | CN2833714Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175899A (en) * | 2011-01-07 | 2011-09-07 | 中国空间技术研究院 | Automatic test safety control method of satellite interface |
| CN102494806A (en) * | 2011-12-21 | 2012-06-13 | 中国计量学院 | Long-distance automatic verification system of digital display type temperature indicating instrument |
| CN103134988A (en) * | 2013-01-31 | 2013-06-05 | 中国科学院上海技术物理研究所 | Multichannel value of resistance automation measuring system |
| CN112327695A (en) * | 2020-11-04 | 2021-02-05 | 麦克传感器股份有限公司 | Multi-channel signal switcher |
| CN112798841A (en) * | 2020-12-29 | 2021-05-14 | 北京无线电计量测试研究所 | Full-automatic measuring device and method for digital multimeter |
-
2005
- 2005-10-19 CN CN 200520079588 patent/CN2833714Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175899A (en) * | 2011-01-07 | 2011-09-07 | 中国空间技术研究院 | Automatic test safety control method of satellite interface |
| CN102175899B (en) * | 2011-01-07 | 2013-06-19 | 中国空间技术研究院 | Automatic test safety control method of satellite interface |
| CN102494806A (en) * | 2011-12-21 | 2012-06-13 | 中国计量学院 | Long-distance automatic verification system of digital display type temperature indicating instrument |
| CN103134988A (en) * | 2013-01-31 | 2013-06-05 | 中国科学院上海技术物理研究所 | Multichannel value of resistance automation measuring system |
| CN112327695A (en) * | 2020-11-04 | 2021-02-05 | 麦克传感器股份有限公司 | Multi-channel signal switcher |
| CN112798841A (en) * | 2020-12-29 | 2021-05-14 | 北京无线电计量测试研究所 | Full-automatic measuring device and method for digital multimeter |
| CN112798841B (en) * | 2020-12-29 | 2023-11-14 | 北京无线电计量测试研究所 | Full-automatic measuring device and method for digital multimeter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |