CN205665316U - Novel resistance automatic measure device - Google Patents

Novel resistance automatic measure device Download PDF

Info

Publication number
CN205665316U
CN205665316U CN201620534604.9U CN201620534604U CN205665316U CN 205665316 U CN205665316 U CN 205665316U CN 201620534604 U CN201620534604 U CN 201620534604U CN 205665316 U CN205665316 U CN 205665316U
Authority
CN
China
Prior art keywords
circuit
relay
measuring unit
minimum system
current source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201620534604.9U
Other languages
Chinese (zh)
Inventor
汪俊
周海军
宋婕
汪洋
王晓雯
李明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chuzhou University
Original Assignee
Chuzhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chuzhou University filed Critical Chuzhou University
Priority to CN201620534604.9U priority Critical patent/CN205665316U/en
Application granted granted Critical
Publication of CN205665316U publication Critical patent/CN205665316U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a novel resistance automatic measure device, include the minimum system of singlechip, supply circuit, constant -current source circuit, range selection circuit, relay and drive circuit, enlarge and data conversion circuit and display circuit, the constant -current source circuit, enlarge and data conversion circuit and the minimum system of singlechip connect gradually, the minimum system of singlechip is connected with display circuit and relay and drive circuit respectively, relay and drive circuit even have the range selection circuit, this novel resistance automatic measure device tests the rising edge of triangular wave and the slope of trailing edge through new scheme.

Description

A kind of Novel resistor self-operated measuring unit
Technical field
This utility model belongs to electronic surveying field, is specifically related to a kind of Novel resistor self-operated measuring unit.
Background technology
Along with the development of electronics industry, electronic devices and components sharply increase, and in current Electronic Testing field, resistance measurement is Measurement technology and research and development of products are applied quite varied.Most widely used in life is circuit tester, and traditional general-purpose is boasted of one's bit of contribution Can be more, resistance, voltage etc. can be measured, general adoption rate method measures, but when measuring resistance, the least electricity Resistance, circuit tester test value degree of accuracy is very poor.Also there are corresponding resistor measuring instrument in more external special instrument manufacturing enterprises, although survey Examination precision is preferable, but expensive.
Utility model content
This utility model is for prior art problem, it is provided that a kind of interior in a big way by relatively simple circuit realiration The measurement of resistance value, particularly has certain certainty of measurement to the little valued resistor of 1 below Ω, it is ensured that is suitable for major part resistance and surveys The Novel resistor self-operated measuring unit of amount occasion.
Technology and method in order to solve the employing of the present utility model of above-mentioned problem are as follows:
A kind of Novel resistor self-operated measuring unit, including single-chip minimum system, power supply circuits, constant-current source circuit, range Selection circuit, relay and drive circuit, amplify and data converting circuit and display circuit, described constant-current source circuit, amplification and Data converting circuit and single-chip minimum system are sequentially connected with, described single-chip minimum system respectively with display circuit and relay And drive circuit connects, described relay and drive circuit are connected with selective circuit of measuring range.
As preferably, the negative-feedback circuit that described constant-current source circuit amplifier is constituted.
As preferably, in described selective circuit of measuring range, it is provided with 8 ranges.
As preferably, in described relay and drive circuit, it is provided with relay and the on-off circuit of 5V direct current.
As preferably, described on-off circuit is low-power transistor.
As preferably, described amplification and data converting circuit include in-phase proportion computing circuit and 10 bit data conversion electricity Road.
It is made up of the core of electric resistance measuring apparatus many constant-current source circuits, utilizes relay according to the constant current pre-set The size of source current value carries out range switching, and this device is provided with altogether 8 ranges, respectively 0.1 Ω, 1 Ω, 10 Ω, 100 Ω, 1k Ω, 10k Ω, 100k Ω, 1M Ω, after device powers on, first relay is arranged on acquiescence range, and acquiescence range is 8 amounts Maximum in journey, measurement resistance is at 1M about Ω, and after connecting testing resistance, system can select according to the predictive value of measured resistance Suitable range is also accurately measured, and measured value inputs single-chip microcomputers by 10 A/D conversion chips after amplifying, and passes through STC series monolithic carries out data process, and shows on liquid crystal LCD1602.
The beneficial effects of the utility model are: utilize relatively simple novel circuit configuration to achieve 0.1 Ω-1M about Ω The accurate measurement of resistance, the particularly measurement of its precision preferable to little valued resistor.
Accompanying drawing explanation
Fig. 1 is the theory diagram of Novel resistor self-operated measuring unit of the present utility model.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is described in further detail, but they are not to this utility model The restriction of technical scheme, any conversion made based on this utility model training centre, all fall within protection domain of the present utility model.
Refering to shown in Fig. 1, a kind of Novel resistor self-operated measuring unit, including single-chip minimum system, power supply circuits, constant current Source circuit, selective circuit of measuring range, relay and drive circuit, amplification and data converting circuit and display circuit.
Wherein, constant-current source circuit principle mainly combines outer member by amplifier and constitutes negative-feedback circuit, passes through a reference source Determine two standard voltage value, then determine the current value set by constant-current source according to two magnitude of voltage institute connecting resistance values, pass through Different connect measuring resistances can determine that different constant current value, and in figure, amplifier should use the amplifier that difference-mode input resistance is big, and audion is adopted With the multiple tube of middle power, improve current amplification factor.
Wherein, selective circuit of measuring range is provided with 8 ranges, automatically can be switched over, by 8 differences by programme-control Resistance be linked in constant-current source circuit, determine the size of constant current so that it is determined that range, the precision of these eight resistance directly affects Produced constant current value obtains size, all uses high-precision resistance to realize.
Wherein, relay group and drive circuit thereof automatically determine range to be selected by three selections by processor, Relay therein uses the relay of conventional 5V direct current, and it is real that drive circuit utilizes low-power transistor to constitute on-off circuit Existing.
Wherein the effect of amplifying circuit is to being suitable for the magnitude of voltage that data converting circuit gathers voltage amplification, passes through homophase Scaling circuit is constituted, and at least can produce the amplification of 1 times, can be realized the regulation of voltage amplification factor by the regulation of R1, Realize output voltage eventually in the range of 0-5V, facilitate data converting circuit to gather data.
Wherein data converting circuit is converted into digital quantity by the data converting circuit of 10 the voltage gathered and is transferred to In single-chip microcomputer.
Wherein, single-chip minimum system and display circuit control relay switching selection range by processor and show institute Measuring resistance value.
The beneficial effects of the utility model are: utilize relatively simple novel circuit configuration to achieve 0.1 Ω-1M about Ω The accurate measurement of resistance, the particularly measurement of its precision preferable to little valued resistor.
The above, detailed description of the invention the most of the present utility model, but protection domain of the present utility model does not limit to In this, any change expected without creative work or replacement, all should contain within protection domain of the present utility model, Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claims are limited.

Claims (6)

1. a Novel resistor self-operated measuring unit, it is characterised in that: include single-chip minimum system, power supply circuits, constant-current source Circuit, selective circuit of measuring range, relay and drive circuit, amplification and data converting circuit and display circuit, described constant-current source electricity Road, amplification and data converting circuit and single-chip minimum system are sequentially connected with, and described single-chip minimum system is electric with display respectively Road and relay and drive circuit connect, and described relay and drive circuit are connected with selective circuit of measuring range.
A kind of Novel resistor self-operated measuring unit the most according to claim 1, it is characterised in that: described constant-current source circuit is transported Put the negative-feedback circuit of composition.
A kind of Novel resistor self-operated measuring unit the most according to claim 2, it is characterised in that: described selective circuit of measuring range Inside it is provided with 8 ranges.
A kind of Novel resistor self-operated measuring unit the most according to claim 3, it is characterised in that: described relay and driving Relay and the on-off circuit of 5V direct current it is provided with in circuit.
A kind of Novel resistor self-operated measuring unit the most according to claim 4, it is characterised in that: described on-off circuit is little Pliotron.
A kind of Novel resistor self-operated measuring unit the most according to claim 5, it is characterised in that: described amplification and data turn Change circuit and include in-phase proportion computing circuit and 10 bit data change-over circuits.
CN201620534604.9U 2016-05-31 2016-05-31 Novel resistance automatic measure device Expired - Fee Related CN205665316U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620534604.9U CN205665316U (en) 2016-05-31 2016-05-31 Novel resistance automatic measure device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620534604.9U CN205665316U (en) 2016-05-31 2016-05-31 Novel resistance automatic measure device

Publications (1)

Publication Number Publication Date
CN205665316U true CN205665316U (en) 2016-10-26

Family

ID=57158643

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620534604.9U Expired - Fee Related CN205665316U (en) 2016-05-31 2016-05-31 Novel resistance automatic measure device

Country Status (1)

Country Link
CN (1) CN205665316U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107219402A (en) * 2017-06-07 2017-09-29 中国电子科技集团公司第二十四研究所 A kind of circuit for quick measurement of DC resistance for power module port
CN108931690A (en) * 2018-07-23 2018-12-04 秦国锋 Embedded AC resistance measuring system based on ARM
CN109975616A (en) * 2018-12-29 2019-07-05 浙江机电职业技术学院 A kind of wide-range high-precision resistance meter
CN113009236A (en) * 2020-10-16 2021-06-22 东莞市明信技术有限公司 Micro-ohm resistance testing module based on single chip microcomputer design

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107219402A (en) * 2017-06-07 2017-09-29 中国电子科技集团公司第二十四研究所 A kind of circuit for quick measurement of DC resistance for power module port
CN107219402B (en) * 2017-06-07 2019-06-21 中国电子科技集团公司第二十四研究所 A kind of circuit for quick measurement of DC resistance for power module port
CN108931690A (en) * 2018-07-23 2018-12-04 秦国锋 Embedded AC resistance measuring system based on ARM
CN109975616A (en) * 2018-12-29 2019-07-05 浙江机电职业技术学院 A kind of wide-range high-precision resistance meter
CN109975616B (en) * 2018-12-29 2021-08-17 浙江机电职业技术学院 Wide-range high-precision resistance tester
CN113009236A (en) * 2020-10-16 2021-06-22 东莞市明信技术有限公司 Micro-ohm resistance testing module based on single chip microcomputer design

Similar Documents

Publication Publication Date Title
CN205665316U (en) Novel resistance automatic measure device
CN204064410U (en) A kind of electronic scales based on resistance strain gage
CN201392382Y (en) Generating energy testing instrument of solar cell component
CN105573391A (en) Open-circuit voltage control circuit of solar array simulator and open-circuit voltage control method thereof
CN102072925A (en) Stroma moisture and conductivity in situ detector and method for determining salinity
CN204575774U (en) There is the programmable electronic load of direct current resistance measuring ability
CN103604525A (en) Thermal resistor temperature measuring instrument based on verification data
CN202421385U (en) Portable transformer tester
CN206057428U (en) A kind of digital galvanometer for microwave waveguide measuring system
CN204758675U (en) Digital potentiometer
CN103116150A (en) Verifying device of insulated online monitoring equipment of oxide arrester
CN202758003U (en) DC resistance tester
CN105277292A (en) Temperature measurement device
CN204228946U (en) A kind of electric energy meter error calibrating installation
CN103852002A (en) Portable low-power-consumption static resistance strain indicator
CN204405739U (en) Automatic on-line resistance measuring system
CN204287456U (en) A kind of Novel magnetic field sensor
CN203825100U (en) Transformer transformation ratio tester
CN206378535U (en) A kind of detection platform of small resistor resistance
CN206411192U (en) Simple electric resistance measuring apparatus for teaching
CN108267640A (en) A kind of device of single supply supplying measure resistance
CN201936204U (en) Device for measuring and controlling internal temperature of operational amplifier chip
CN206339316U (en) Multi-channel temperature measurement device
CN204855028U (en) Thermistor detecting system based on constant current control circuit
CN102175941B (en) Optical coupler measurement device capable of directly displaying current transfer ratio

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20161026

Termination date: 20200531