CN204347136U - LCR multifunctional measuring handheld device - Google Patents

LCR multifunctional measuring handheld device Download PDF

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Publication number
CN204347136U
CN204347136U CN201520065800.1U CN201520065800U CN204347136U CN 204347136 U CN204347136 U CN 204347136U CN 201520065800 U CN201520065800 U CN 201520065800U CN 204347136 U CN204347136 U CN 204347136U
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CN
China
Prior art keywords
chip microcomputer
lcr
handheld device
multivibrator
circuit
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Expired - Fee Related
Application number
CN201520065800.1U
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Chinese (zh)
Inventor
陈兵兵
周元元
张忠祥
齐琦
曹欣远
胡长根
姚敏
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Hefei Normal University
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Hefei Normal University
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Priority to CN201520065800.1U priority Critical patent/CN204347136U/en
Application granted granted Critical
Publication of CN204347136U publication Critical patent/CN204347136U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of LCR multifunctional measuring handheld device, comprise shell, described shell is provided with a display screen, be provided with testing circuit within described shell, described testing circuit comprises single-chip microcomputer, multivibrator, Colpitts oscillation circuit and selection circuit; Described display screen is connected with the single-chip microcomputer of described testing circuit, for showing the inductance value or capacitance that detect; Described multivibrator, Colpitts oscillation circuit and selection circuit are all connected with described single-chip microcomputer; Detected inductance is connected with described single-chip microcomputer by Colpitts oscillation circuit, and detected electric capacity is connected with described single-chip microcomputer by multivibrator.LCR multifunctional measuring handheld device of the present utility model, has advantages such as measuring that relative error is less than 1%, measurement range is large, low-power consumption, low cost, volume are little.

Description

LCR multifunctional measuring handheld device
Technical field
The utility model relates to a kind of LCR multifunctional measuring handheld device.
Background technology
In recent years, the develop rapidly of electron trade, most of user uses multimeter to measure the electric current and voltage in some component parameters or circuit.But multimeter but has certain limitation, it can only measure the parameter of the components and parts of limited kinds, but can not this part components and parts of inductance measuring electric capacity.
At present, special inductance and capacitance measureing instruments body amasss large and expensive, and market price is all more than 200 yuan.So make, one is easy to carry, measuring accuracy is high and low-cost capacitor and inductance measurement instrument seems particularly important, facilitates the occurrence needing electric capacity and the inductance used in the accurate metering circuit of user.
Utility model content
The utility model is for avoiding the weak point that exists in above-mentioned prior art, providing a kind of LCR multifunctional measuring handheld device, to realize the accurate measurement of capacitor and inductor and to reduce and measure cost.
The utility model be technical solution problem by the following technical solutions.
LCR multifunctional measuring handheld device, its design feature comprises shell, described shell is provided with a display screen, be provided with testing circuit within described shell, described testing circuit comprises single-chip microcomputer, multivibrator, Colpitts oscillation circuit and selection circuit; Described display screen is connected with the single-chip microcomputer of described testing circuit, for showing the inductance value or capacitance that detect; Described multivibrator, Colpitts oscillation circuit and selection circuit are all connected with described single-chip microcomputer; Detected inductance is connected with described single-chip microcomputer by Colpitts oscillation circuit, and detected electric capacity is connected with described single-chip microcomputer by multivibrator.
The design feature of LCR multifunctional measuring handheld device of the present utility model is also:
Described multivibrator is NE555.
Described single-chip microcomputer is PIC12CE674.
Described display screen is LCD1602.
Compared with the prior art, the utility model beneficial effect is embodied in:
LCR multifunctional measuring handheld device of the present utility model, breaks through the limitation of traditional measurement instrument and meter, adopts that novel measurement scheme makes measurement relative error be less than 1%, measurement range is large.This equipment adopts 8 pin PIC12CE674 chips to be main control chip, and this chip operating voltage scope is 2.5V-5.5V, carries 8 bit A/D converters, low in energy consumption.Utilize 555 timers to gather the value of measured device, in order to eliminate interference, the AD converter that institute's measured value is carried by chip being changed, after obtaining the frequency identical with component values size, utilizing genetic algorithm to obtain closest to institute's survey components and parts actual value.Rational hardware design ensure that the practical features such as the low-power consumption of equipment, low cost, volume be little, and succinct software configuration improves measurement range and the measuring accuracy of equipment.
LCR multifunctional measuring handheld device of the present utility model, has advantages such as measuring that relative error is less than 1%, measurement range is large, low-power consumption, low cost, volume are little.
Accompanying drawing explanation
The structured flowchart of the LCR multifunctional measuring handhold device system that Fig. 1 proposes for the utility model.
Below by way of embodiment, and the utility model is described in further detail by reference to the accompanying drawings.
Embodiment
See accompanying drawing 1, LCR multifunctional measuring handheld device of the present utility model, comprise shell, described shell is provided with a display screen, be provided with testing circuit within described shell, described testing circuit comprises single-chip microcomputer, multivibrator, Colpitts oscillation circuit and selection circuit; Described display screen is connected with the single-chip microcomputer of described testing circuit, for showing the inductance value or capacitance that detect; Described multivibrator, Colpitts oscillation circuit and selection circuit are all connected with described single-chip microcomputer; Detected inductance is connected with described single-chip microcomputer by Colpitts oscillation circuit, and detected electric capacity is connected with described single-chip microcomputer by multivibrator.
Described multivibrator is NE555.NE555 is a kind of model wherein of the timing IC belonging to 555 series, the pin function of 555 serial IC and to use be all compatible, just model different because of its price its degree of stability different, power saving, producible oscillation frequency also not quite identical; And 555 are one and have many uses and quite general timing IC, only need resistance and the electric capacity of minority, just can produce the pulse wave signal of the various different frequencies needed for digit circuit.
Described single-chip microcomputer is PIC12CE674.Adopt 8 pin PIC12CE674 chips to be main control chip, this chip operating voltage scope is 2.5V-5.5V, carries 8 bit A/D converters, low in energy consumption.
PIC12CE674-04/P single-chip microcomputer is the integrated microcontroller of high-performance that Microchip company releases, and volume is little, low in energy consumption, is applicable to the consumer electronics product of portable, battery powered, and has the following advantages: (1) 8 A/D converter; (2) RAM of 16K*8 position EEPROM and 128*8 byte-sized is carried; (3) line writing program is supported in; The instruction of (4) 14 bit wides; (5) low power idle mode, battery saving mode.
Described display screen is LCD1602.LCD1602 is a kind of industrial character mode lcd, can show 16x02 i.e. 32 characters simultaneously, namely can show two row, often row 16 character liquid crystal modules (display character and numeral).1602 liquid crystal are also 1602 character mode lcds, and it is a kind of dot matrix type Liquid Crystal Module being used for showing letter, numeral, symbol etc. specially.It is made up of dot character positions such as several 5X7 or 5X11, each dot character position can show a character, the interval of a some distance is had between every, often also there is interval between row, serve the effect of character pitch and line space, Just because of this thus it can not well display graphics (use self-defined CGRAM, display effect is also bad.
The traditional measurement components and parts method of inductance capacitance mostly equipment volume is comparatively large, and measuring accuracy is low, carries with the drawbacks such as inconvenient.LCR multifunctional measuring handheld device of the present utility model, breaks through the limitation of traditional measurement instrument and meter, adopts that novel measurement scheme makes measurement relative error be less than 1%, measurement range is large.This equipment adopts 8 pin PIC12CE674 chips to be main control chip, and this chip operating voltage scope is 2.5V-5.5V, carries 8 bit A/D converters, low in energy consumption.Utilize 555 timers to gather the value of measured device, in order to eliminate interference, the AD converter that institute's measured value is carried by chip being changed, after obtaining the frequency identical with component values size, utilizing genetic algorithm to obtain closest to institute's survey components and parts actual value.Rational hardware design ensure that the practical features such as the low-power consumption of equipment, low cost, volume be little, and succinct software configuration improves measurement range and the measuring accuracy of equipment.
Selection circuit is for selecting inductance measurement pattern or capacitance measurement pattern.When measuring resistance and electric capacity, adopt 555 timers to form multivibrator, through the screening of genetic algorithm after AD conversion, obtain corresponding accurate value.During inductance measuring, in order to improve measuring accuracy, utilizing the concussion of capacitance three-point type sine wave, after AD conversion, utilizing genetic algorithm acquisition closest to the value of actual size equally.Core processor adopts the PIC single chip microcomputer of 8 pin.LCR multifunctional measuring handheld device of the present utility model, it is little that product takies volume, viewed from face down only 1602 display sizes, control panel is placed on the display back side.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.

Claims (4)

1. LCR multifunctional measuring handheld device, it is characterized in that, comprise shell, described shell is provided with a display screen, be provided with testing circuit within described shell, described testing circuit comprises single-chip microcomputer, multivibrator, Colpitts oscillation circuit and selection circuit; Described display screen is connected with the single-chip microcomputer of described testing circuit, for showing the inductance value or capacitance that detect; Described multivibrator, Colpitts oscillation circuit and selection circuit are all connected with described single-chip microcomputer; Detected inductance is connected with described single-chip microcomputer by Colpitts oscillation circuit, and detected electric capacity is connected with described single-chip microcomputer by multivibrator.
2. LCR multifunctional measuring handheld device according to claim 1, is characterized in that, described multivibrator is NE555.
3. LCR multifunctional measuring handheld device according to claim 1, is characterized in that, described single-chip microcomputer is PIC12CE674.
4. LCR multifunctional measuring handheld device according to claim 1, is characterized in that, described display screen is LCD1602.
CN201520065800.1U 2015-01-29 2015-01-29 LCR multifunctional measuring handheld device Expired - Fee Related CN204347136U (en)

Priority Applications (1)

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CN201520065800.1U CN204347136U (en) 2015-01-29 2015-01-29 LCR multifunctional measuring handheld device

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Application Number Priority Date Filing Date Title
CN201520065800.1U CN204347136U (en) 2015-01-29 2015-01-29 LCR multifunctional measuring handheld device

Publications (1)

Publication Number Publication Date
CN204347136U true CN204347136U (en) 2015-05-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105572754A (en) * 2016-01-20 2016-05-11 吉林大学 Automatic measuring device for load parameters for geophysical prospecting, and measuring method thereof
CN106841819A (en) * 2017-03-14 2017-06-13 南宁市高光信息技术有限公司 A kind of capacitor and inductance measurement system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105572754A (en) * 2016-01-20 2016-05-11 吉林大学 Automatic measuring device for load parameters for geophysical prospecting, and measuring method thereof
CN106841819A (en) * 2017-03-14 2017-06-13 南宁市高光信息技术有限公司 A kind of capacitor and inductance measurement system

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

Granted publication date: 20150520

Termination date: 20160129

EXPY Termination of patent right or utility model