CN201548194U

CN201548194U - Portable electronic plug gauge

Info

Publication number: CN201548194U
Application number: CN200920296918XU
Authority: CN
Inventors: 李尧; 许宁; 王伟; 张金英
Original assignee: Libang Measuremnet & Control Equipment (luoyang) Co Ltd
Current assignee: Libang Measuremnet & Control Equipment (luoyang) Co Ltd
Priority date: 2009-12-14
Filing date: 2009-12-14
Publication date: 2010-08-11
Anticipated expiration: 2019-12-14

Abstract

The utility model relates to a portable electronic plug gauge. A shell which can shield external signals is arranged. A measuring head is arranged at one end of the shell. A sensor is arranged in the measuring head. A signal processor is arranged in the shell. A display is arranged on the shell. The output signal of the sensor is input into the signal processor for processing. After the signal is output by the signal processor, the signal is displayed on the display. Since the measuring head and the display are integrally modularized, the carrying and the use are convenient. Since an entire system adopts a voltage stabilizing chip with switching function and a DC voltage conversion module, on one hand, the working voltage of the entire system is kept to be stable, and on the other hand, the system can enter a good power-saving mode under the condition that the instrument is not used for a long time. Thereby, the utility model has the advantages that the service life of the instrument is improved to the utmost extent, the structure is simple and the carrying and the use are convenient.

Description

A kind of portable electronic plug gauge

Technical field

The utility model relates to a kind of internal measuring instrument, a kind of specifically portable electronic plug gauge.

Background technology

At present, existing inductance type internal diameter measuring instrument mainly is a whole set of pick-up unit that cooperates display processing system (mostly be electron beam or measure electronic box) with measurement mechanism.Accurate inductive displacement transducer is by the variation of perception aperture size, and by going between signal passed to display processing unit, and result is shown.The built-in electronics feeler gauge of a kind of double-flexibility hinge of Chinese patent inductance for example, its application number: 96203363.4 and a kind of precise electronic feeler gauge of Chinese patent, its application number: 200820062450.3.This type of electronic plug gauge has significant disadvantages: one, measurement and display processing system branch are arranged, and display processing system is generally a whole set of pick-up unit, and volume is big, carry and use very inconvenience; Two, because electronic plug gauge and display processing unit adopt long lead-in wire to be connected, and the uncertainty of joint and lead resistance certainly will exert an influence to accuracy of detection, cause measure after demonstration instability, error bigger; Its three because display device adopts the 220V Alternating Current Power Supply, when testing environment lacks external power supply, the amount instrument can't use.

The utility model content

The technical problems to be solved in the utility model provides a kind of portable electronic plug gauge, it is not only easy to carry, easy to use, and will measure and show the employing integrative-structure, thereby reduced joint and than the uncertainty of long lead resistance to the influence that accuracy of detection produces, improved its measuring accuracy.

The utility model is that the technical scheme that the deficiency that solves the problems of the technologies described above adopts is: a kind of portable electronic plug gauge, be provided with the shell of a maskable outer signals, be provided with gauge head at shell one end, sensor is arranged in the gauge head body, in its shell, be provided with signal processor, on shell, be provided with display, handle by the sensor output signal input signal processor, output is after the display demonstration, described signal processor is by signal processing module, analog to digital conversion circuit, single-chip microcomputer, transforming circuit I, transforming circuit II, booster circuit and power supply are formed, signal processing module wherein, analog to digital conversion circuit and single-chip microcomputer are connected in series in proper order, power supply is divided into the two-way setting, one the tunnel gives analog to digital conversion circuit and single-chip microcomputer power supply through transforming circuit I, and another road powers to signal processing module through transforming circuit II and booster circuit.

Power supply described in the utility model, its output voltage are 4.2V.

Transforming circuit I described in the utility model, the DC voltage of its output is 3V.

Transforming circuit II described in the utility model, the DC voltage of output is 3V.

Booster circuit described in the utility model, it has two output terminals, respectively output+5V and-DC voltage of 5V.

Signal processing module described in the utility model is made of signal supply circuit and signal processing circuit, the signal supply circuit is by sine wave signal generation circuit, signal amplification circuit and signals reverse amplifying circuit constitute, signal processing circuit is by switching regulator all-wave phase-sensitive detection circuit, filtering circuit and dc amplification circuit constitute, the sinusoidal signal that is produced by sinusoidal signal generation circuit obtains amplitude through amplifying circuit and reverse amplification circuit and equates, sensor in the two-way sinusoidal signal input gauge head of phase phasic difference 180 degree, induce the sinusoidal signal relevant with displacement, via switching regulator all-wave phase-sensitive detection circuit, after the filtering circuit processing, produce and the linear direct current signal of change in displacement, after amplifying by dc amplification circuit again, the sampling of input analog to digital conversion circuit.

Transforming circuit II described in the utility model passes through Single-chip Controlling.

The utility model will be measured and show as integrated structure design on the basis of existing measure portion, not only easy to carry and use, and measuring-signal directly inserts in the signaling conversion circuit of display processing unit, thereby the influence that has reduced joint and accuracy of detection has been produced than the uncertainty of long lead resistance, improved its measuring accuracy, secondly, under the situation that does not insert extraneous power supply, the inner low-work voltage circuit of appropriate design, guaranteed its measuring accuracy, the degree of accuracy when portably using provides strong assurance.

The utility model is handled branch road with control end control signal of single-chip microcomputer, by program free time of system is set, and 10～90 seconds optional, and promptly in the time range of setting, if do not carry out any operation, system enters energy-saving mode.When system entered energy-saving mode, single-chip microcomputer turn-offed the output voltage of transforming circuit II, and self enters power-down state, and at this moment, whole instrument enters little power consumption state, and its power consumption is less than 1% of the duty power consumption, and power saving effect is obvious; Secondly when pressing the HOLD key, system returns duty again, and operation is very easy.

The whole display processing system of the utility model has adopted transforming circuit and the booster circuit with switching function, guaranteed the stable operating voltage of total system (because long-time the use on the one hand, under the situation that the lithium battery output voltage descends), on the other hand under obsolete situation of instrument long period, system can enter energy-saving mode (power supply of cut-off signals processing module), the service time of having improved instrument so to greatest extent preferably.

The beneficial effects of the utility model are:

1, the utility model is with measurement mechanism and the design of display system integrative-structure, and use is easy to carry; The direct input signal processing module of measurement data, thereby the influence that has reduced joint and accuracy of detection has been produced than the uncertainty of long lead resistance, and appropriate design its internal circuit system, improved its measuring accuracy from integral body, prove through test of many times: its error of indication (linearity)≤1.0 μ m, indicating value mobility (repeatability)≤1.0 μ m, the μ m of stability of display (four hours)≤1.0, temperature wafts≤3.0 μ m/ ℃.

2, the utility model low-power consumption, stand-by power consumption≤10mW, but stream time 〉=12 hour, by the Single-chip Controlling transforming circuit is set in Circuits System, because battery is powered to signal processing module by transforming circuit, therefore, but setting program is controlled its duty, if do not carry out any operation, system enters energy-saving mode.At this moment, whole instrument enters little power consumption state, and its power consumption is less than 1% of the duty power consumption, and power saving effect is obvious.

3, secondly adopted switching regulator all-wave phase-sensitive detection circuit in the signal processing module, and it is made improvement, the appropriate design its internal circuit, main operational amplifier in the circuit (U1, U2) is adjusted into ± operational amplifier of 5V operating voltage, and the field effect transistor that will play on-off action is adjusted into 3DJ6F, its filter effect is better, it is used on the electronic plug gauge precision when making it under ± 5V operating voltage, can guarantee to measure.

4, measurement mechanism is connected an end of shell, the other end is provided with display, is provided with signal processor in the enclosure, the very compactness use that is easy to carry of global design; The aluminium matter member that employed in addition shell is the maskable outer signals effectively prevents the outer signals interference, improves its measuring accuracy, and also is provided with anti-slip tank in aluminium matter member outside, not only light weight, and the measurement of being convenient to hold with a firm grip.

5, because in the prior art, measurement mechanism and display processing unit are individual components, during measurement measurement mechanism is inserted display processing unit by connecting lead-in wire, and display processing unit adopt the 220V Alternating Current Power Supply, when testing environment lacks external power supply, the amount instrument can't use.The utility model adopts lithium battery independently-powered, circuit adopts low-work voltage, and transforming circuit and booster circuit have been adopted, to supply with signal processing module, analog to digital conversion circuit and single-chip microcomputer behind the voltage stationary value desirable value, required voltage when effectively guaranteeing its work, guarantee the precision of measurement, thereby changed the limitation of original device.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a theory diagram of the present utility model.

Fig. 3 is signal processing flow figure of the present utility model.

Fig. 4 is the switching regulator all-wave phase-sensitive detection circuit figure of the utility model signal processing module.

Mark among the figure: 1, sensor, 2, shell, 3, signal processor, 4, display, 5, signal processing module, 6, analog to digital conversion circuit, 7, single-chip microcomputer, 8, transforming circuit I, 9, transforming circuit II, 10, booster circuit, 11, power supply, 12, the HOLD key, 13, operating key, 14, gauge head.

Embodiment

The utility model, a kind of portable electronic plug gauge, its concrete embodiment is:

As shown in Figure 1, a kind of portable electronic plug gauge, to measure and show the integrative-structure design, end at shell 2 is provided with gauge head 14, and gauge head 14 foremost adopts the double-flexibility linkage, and the core component in the sensor 1 (being magnetic core and telefault) directly is installed in the double-flexibility hinge bodies, display 4 is embedded in shell 2 outsides, be provided with signal processor 3 in shell 2, sensor 1, signal processor 3 and display 4 order serial connections also are provided with HOLD key 12 and operating key 13 on shell 2.

Shell of the present utility model can adopt aluminium shell, not only effectively with the electric field and the magnetic field shielding in the external world, has guaranteed the precision of measuring, and because aluminum member is in light weight, has been more convenient for carrying.

As shown in Figure 2, theory diagram of the present utility model, described signal processor 3 is made up of signal processing module 5, analog to digital conversion circuit 6, single-chip microcomputer 7, transforming circuit I 8, transforming circuit II9, booster circuit 10 and power supply 11, wherein signal processing module 5, analog to digital conversion circuit 6 and single-chip microcomputer 7 orders are connected in series, power supply 11 is divided into the two-way setting, one the tunnel gives analog to digital conversion circuit 6 and single-chip microcomputer 7 power supplies through transforming circuit I 8, and another road powers for signal processing module 5 through transforming circuit II9 with booster circuit 10.By gauge head 14 aperture size is delivered in the precise displacement sensor 1, then the signal input signal processing module 13 of sensor 1 after analog to digital conversion circuit 8 is handled, is imported single-chip microcomputer 6 and is handled again, and the data after the processing will externally show on the display 4.

Described display 4 is embedded in shell 2 outsides, and at the output terminal access display of shell 2 inner single-chip microcomputers 7, measurement result shows from display.

Shell 2 its outside surfaces described in the utility model are provided with the projection of strip vertically, thereby increase the measurement of can better holding with a firm grip that rubs, and have avoided influencing measuring accuracy because of small slip.

Mu balanced circuit II 11 described in the utility model is by single-chip microcomputer 6 controls.

Fig. 2 is a theory diagram of the present utility model, divide duplex feeding by power supply 11 (for example lithium battery), circuit adopts the IC of low-work voltage, low-power consumption, the lithium battery output voltage is 3.7V-4.2V (changing with battery electric quantity), one the tunnel through being stabilized in 3V with voltage behind transforming circuit I 8 (REG102), and the voltage after stablizing is supplied with single-chip microcomputer 7 (STC89LE58) and analog to digital conversion circuit 6; Other one the tunnel is stabilized in 3V through transforming circuit II9 (REG102) back voltage, behind booster circuit 10 (DC-DC), to 5V, gives signal processing module 5 power supplies then the voltage transformation of 3V.

The output terminal of single-chip microcomputer 7 of the present utility model inserts transforming circuit II 9, so transforming circuit II9 is subjected to the control of single-chip microcomputer 7, but single-chip microcomputer 7 programmed control its turn-off output voltage.Described single-chip microcomputer 7 is low-power scm (STC89LE58), and it has controlled power down function, by program free time of system is set, and 10～90 seconds optional, and promptly in the time range of setting, if do not carry out any operation, system enters energy-saving mode.When system entered energy-saving mode, single-chip microcomputer turn-offed the output voltage of transforming circuit II9, and self enters power-down state, and at this moment, whole instrument enters little power consumption state, and its power consumption is less than 1% of the duty power consumption.When pressing HOLD key 12, system returns duty again.

Signal processing module 5 described in the utility model is made of signal supply circuit and signal processing circuit, described signal supply circuit is by sine wave signal generation circuit, signal amplification circuit and signals reverse amplifying circuit constitute, described signal processing circuit is by switching regulator all-wave phase-sensitive detection circuit, filtering circuit and dc amplification circuit constitute, by signal processing flow among Fig. 3 as can be known, produce the sinusoidal signal of stabilized frequency and amplitude by sinusoidal signal generation circuit, obtaining amplitude through signal amplification circuit and reverse amplification circuit equates, displacement transducer in the two-way sinusoidal signal input gauge head of phase phasic difference 180 degree, induce switching regulator all-wave phase-sensitive detection circuit a end among sinusoidal signal input Fig. 4 relevant with displacement, signal input switch formula all-wave phase-sensitive detection circuit b end by the output of signals reverse amplifying circuit, after the overall treatment of switching regulator all-wave phase-sensitive detection circuit, handle through filtering circuit from the output of c end, then produce and the linear direct current signal of change in displacement, after amplifying by dc amplification circuit again, signal is so far finished dealing with, and imports analog to digital conversion circuit 6 samplings thereafter.

Fig. 4 is switching regulator all-wave phase-sensitive detection circuit figure, be the improvement on the basis of existing switching regulator all-wave phase sensitive detection technology: the main operational amplifier in the circuit (U1, U2) is adjusted into ± operational amplifier (C4558, TLV2422C) of 5V operating voltage, and the field effect transistor that will play on-off action is adjusted into 3DJ6F, its filter effect is better, simultaneously can better use battery just can satisfy its measuring accuracy, and needn't use external power supply, its effect is that the sine wave with out of phase is converted to direct current signal.

The utility model adopts differential type inductance principle, gauge head foremost adopts the double-flexibility linkage, sensor directly is installed in (being magnetic core and telefault directly is installed in the double-flexibility hinge bodies) in the double-flexibility hinge bodies, gauge head is delivered to aperture size in the precise displacement sensor, according to the inductance principle, produce faint AC signal in the sensor, and signal inputed to signal processing module, input to analog to digital conversion circuit after the processing, signal after the conversion passes to single-chip microcomputer, according to the setting of program, single-chip microcomputer is presented on the liquid crystal display after digital signal is handled.

The utility model, total system has adopted mu balanced circuit and the DC voltage modular converter with switching function, guaranteed the stable operating voltage of total system (because long-time the use on the one hand, under the situation that the lithium battery output voltage descends), under obsolete situation of instrument long period, system can enter energy-saving mode (power supply of cut-off signals processing module) preferably on the other hand.Improved the service time of instrument so to greatest extent.

The experiment proved that: the error of indication of electronic plug gauge (linearity)≤1.0 μ m, indicating value mobility (repeatability)≤1.0 μ m, the μ m of stability of display (four hours)≤1.0, temperature wafts≤3.0 μ m/ ℃, stream time 〉=12 hour, stand-by power consumption≤10mW.This shows that the utility model has good working performance, it is simple in structure in addition, and is easy to carry and use, and very big market outlook are arranged.

Claims

1. portable electronic plug gauge, be provided with the shell (2) of a maskable outer signals, be provided with gauge head (14) at shell (2) one ends, sensor (1) is arranged in gauge head (14) body, it is characterized in that: in its shell (2), be provided with signal processor (3), on shell, be provided with display (4), sensor (1), signal processor (3) and display (5) order serial connection, described signal processor (3) is by signal processing module (5), analog to digital conversion circuit (6), single-chip microcomputer (7), transforming circuit I (8), transforming circuit II (9), booster circuit (10) and power supply (11) are formed, signal processing module (5) wherein, analog to digital conversion circuit (6) and single-chip microcomputer (7) order serial connection, between power supply (11) analog to digital conversion circuit (6) and single-chip microcomputer (7), be provided with transforming circuit I (8), between power supply (11) and signal processing module (5), be provided with transforming circuit II (9) and booster circuit (10).

2. a kind of portable electronic plug gauge according to claim 1 is characterized in that: described power supply (11), its output voltage are 4.2V.

3. a kind of portable electronic plug gauge according to claim 1 is characterized in that: described transforming circuit I (8), the DC voltage of its output is 3V.

4. a kind of portable electronic plug gauge according to claim 1 is characterized in that: described transforming circuit II (9), the DC voltage of output is 3V.

5. a kind of portable electronic plug gauge according to claim 1 is characterized in that: described booster circuit (10), it has two output terminals, respectively output+5V and-DC voltage of 5V.

6. a kind of portable electronic plug gauge according to claim 1, it is characterized in that: described signal processing module (5) is made of signal supply circuit and signal processing circuit, the signal supply circuit is made of sine wave signal generation circuit, signal amplification circuit and signals reverse amplifying circuit, signal processing circuit is made of switching regulator all-wave phase-sensitive detection circuit, filtering circuit and dc amplification circuit, sensor (1) in the output terminal input gauge head of signal supply circuit, the signal of output inserts signal processing circuit, imports analog to digital conversion circuit (6) thereafter.

7. a kind of portable electronic plug gauge according to claim 1 is characterized in that: the control end of described single-chip microcomputer (7) connects with transforming circuit II (9).