CN2115544U - Pocket luminous display tesla instrument - Google Patents

Abstract

The utility model discloses a pocket luminous display Tesla instrument, which comprises a casing, a probe, a probe arm, a probe protective shield, a sensor-voltage input socket, a displaying scale, an absolute and a relative measuring scales and zero indications thereof, a range-changing switch, a measurement range indication and a scale thereof, a power switch, a zero-adjustment knob and a magnetic measuring circuit. As a pocket hand-hold operation structure is adopted, the utility model which is convenient for carrying and is suitable for hand-hold checking in job sites can measure the sizes and directions of the magnetic induction of various orientations, having obvious and visual displaying. The range is 0 to 0.285 T, and the minimum graduation is 0.002 T.

Description

Pocket luminous display Tesla instrument

The luminous demonstration teslameter of the utility model pocket relates to the magnetometer table, the luminous demonstration teslameter of particularly a kind of pocket.

Digital and pointer magnetometer table of the prior art has the following disadvantages: overall volume is big, and its structure is not easy to hand-held and carries out the scene and detect; Probe turns to dumb, is not easy to detect the magnetic field of various orientations; Show that response speed is low, can not show dynamic magnetic field; To the image inadequately that the size and Orientation of the magnetic induction density in magnetic field shows, eye-catching; Digital magnetometer table can not be represented interval of values visually, pointer-type and the digital magnetometer table of LCD, and inconvenience is observed in dark situation, and is subject to electromagnetic interference (EMI), and measurement result is prone to site error.

The purpose of the luminous demonstration teslameter of the utility model pocket is to overcome above-mentioned the deficiencies in the prior art part, a kind of structure dexterity is provided, be convenient to hand, adopt the probe that turns to flexibly, with the luminous demonstration teslameter of the pocket of the simulation luminous demonstration of high-speed linear, carry out the scene with hand-held and detect, can detect the magnetic field of various orientations, vivid, eye-catching, high-speed response ground shows size, direction and the interval of values of magnetic induction density.

The luminous demonstration teslameter of the utility model pocket is that the magnetic circuit of will surveying of taking following scheme to realize is placed in the casing.For using a hand, the handled easily person can finish detecting operation, to pop one's head in, the probe arm, the probe guard shield, probe off line button and sensor voltage input socket are placed in the left side of casing front panel, probe connects by surveying magnetic circuit in the feeder line in the probe arm and sensor voltage input socket and the casing, probe flexibly connects by a rotating shaft and probe arm one end, probe can be done rotating in 0 °～90 ° relative to probe arm axle line, indicate the magnetic induction density direction on the probe, the probe arm other end links to each other with casing by probe off line button, and the probe guard shield covers on probe, the outside of probe arm and probe off line button.The switching knob that relates to operation control, that is: range selector, power switch, the zeroing knob is installed on the casing right panel, i.e. the place that can conveniently touch of right hand thumb.Display scale is arranged in the casing front panel central authorities position of taking back from top to bottom, corresponding respectively absolute measurement scale and the relative measurement scale of settling in both sides, by nethermost display scale, one side of absolute measurement scale is installed absolute measurement zero indication, by the display scale of centre, a side of relative measurement scale is settled relative measurement zero indication.The range indication is placed in and the upper right position of the corresponding casing front panel of range selector.Survey magnetic circuit and be placed in the casing, it is by sensor circuit, sensor voltage increment detecting circuit, and display circuit, indicator circuit and power circuit five parts constitute.Adopting two magnetodiodes that pipe is suppressed temperature with complementary connection in the sensor circuit floats and automatic constant current.In sensor voltage increment detecting circuit, adopt the voltage trim potentiometer and the comparison power supply is set in power circuit,, detect the voltage increment that is directly proportional with tested induction level high-resolution with the static component in the compensation sensor output voltage.In display circuit, use the link of secondary ten bit linear voltage display driver ICs to drive 20 (one every) high-luminous-efficiency LED, to being done the simulation luminous demonstration of high-speed linear by measuring magnetic field, the opposed arrangement of display scale on high-luminous-efficiency LED and the casing front panel.The input voltage bleeder circuit that the linear voltage display driver is set is to realize many grades of measurements.The reference voltage trimming circuit of linear voltage display driver is set, so that the sensor of different sensitivity obtains identical scale division value.In power circuit, use the thick film spare that boosts to make DC boosting,, dwindle casing physical dimension to reduce supplying cell quantity.Use screened feeder and anti-jamming circuit to suppress external interference.When the utility model is done the off line detection, the probe arm is buckled and taken off from being fixed on probe off line on the casing, use lengthening transmission feeder one end to be connected on the interior feeder line of probe arm, the other end is connected on the sensor voltage input socket, and the hand hold transducer arm detects.

The effect of the luminous demonstration teslameter of the utility model pocket.Since adopt the structure of being convenient to hand, easy to carry, be suitable for on-the-spot hand-held the detection; Can measure the size of the magnetic induction density of various alignment magnetic fields, and judge its direction fast; Detect static magnetic field, and detect the dynamic magnetic field that frequency is not more than 10KHZ; Show eye-catchingly, image can normally be used in dark situation.Nominal error is less than 5% relatively, and power consumption is less than 95mw, and transducer sensitivity is greater than 1000mV/mA0.1T, and range and calibration are: I shelves 0～0.038T, and-0.02T～+ 0.018T, the 0.002T/ position; II shelves 0～0.095T ,-0.050T～+ 0.045T, the 0.005T/ position; III shelves 0～0.285T ,-0.15T～+ 0.135T, the 0.015T/ position.

Below in conjunction with accompanying drawing the luminous demonstration teslameter of the utility model pocket is further described.

Fig. 1 is the contour structures synoptic diagram of the luminous demonstration teslameter of the utility model pocket.

Fig. 2 is the survey magnetic circuit schematic diagram of the luminous demonstration teslameter of the utility model pocket.

With reference to accompanying drawing 1,2, the luminous demonstration teslameter of the utility model pocket peripheral hardware casing (15), for using a hand, the handled easily person promptly finishes detecting operation, to pop one's head in (1), probe arm (2), probe guard shield (3), probe off line button (4) and sensor voltage input socket (5) are placed in the left side of casing (15) front panel, structural relation between them is: probe (1) flexibly connects by a rotating shaft and probe arm (2) one ends, probe (1) can be done rotating in 0 °～90 ° relative to the arm of popping one's head in (2) axis, probe (1) is gone up and is indicated the magnetic induction density direction, probe (1) connects by the survey magnetic circuit in the feeder line in the probe arm (2) and sensor voltage input socket (5) and the casing (15), probe arm (2) other end links to each other with casing (15) by probe off line button (4), probe guard shield (3) covers on probe (1), probe arm (2), the outside of probe off line button (4).During detection, probe (1) and probe arm (2) rotate probe (1) and probe arm (2) by extending out to check point in the probe guard shield (3), and both coordinate to rotate the magnetic field of detecting various orientations; When off line detects, to pop one's head in (2) take off from being fixed on casing (15) probe off line button (4), use defeated feeder line one end of lengthening to be connected on the interior feeder line of probe arm (2), the other end is connected on the sensor voltage input socket (5), and hand hold transducer arm (2) detects.Relate to range selector (13) with manual manipulation control, power switch (12), zeroing knob (14) is installed on casing (15) right panel from top to down, i.e. the place conveniently touched of right hand thumb.From top to bottom settle 20 display scales (7) at casing (15) the front panel central authorities position of taking back, corresponding absolute measurement scale (6) and the relative measurement scale (8) of settling in its both sides, in absolute measurement scale (6) bottom, settle absolute measurement zero indication (16), from following several the 11 relative measurement scales (8), settle relative measurement zero indication (9).Three range indications (10) are placed in the upper right position with the corresponding casing of range selector (13) (15) front panel, with three range indications (10) difference, three range scales of corresponding arrangement (11).Survey magnetic circuit and be placed in the casing (15), it is by sensor circuit, sensor voltage increment detecting circuit, and display circuit, indicator circuit and power circuit five parts constitute.Sensor circuit comprises the magnetodiode CD of two complementary connections ₁, CD ₂And pull-up resistor R ₁, magnetodiode CD ₁, CD ₂Be installed in the probe (1), link to each other with other survey magnetic circuit in the casing (15) by transmission feeder and the socket CK of shielding, CK is sensor voltage input socket (5).Magnetic induction density signal by measuring magnetic field converts analog voltage signal to by sensor circuit, again by magnetodiode CD ₂Output to sensor voltage increment detecting circuit.Sensor voltage increment detecting circuit is by resistance R ₂, R ₃With potentiometer W ₁Constitute, zeroing knob (14) is installed in potentiometer w ₁On, the static component of Sensor Analog Relay System voltage is by R ₂+ W ₁Voltage on the setting is offset, and the Sensor Analog Relay System voltage increment is detected.Display circuit is by divider resistance R ₄, R ₅, R ₆, K switch _2-1, the linear voltage display driver IC ₁, IC ₂, 20 high-luminous-efficiency diode (LED)s ₁To LED ₂₀Linear voltage display driver reference voltage trimming circuit constitutes.By divider resistance R ₄, R ₅, R ₆The dividing potential drop effect form 1:2.5:7.5 third gear range, K switch _2-1Be range selector (13) that linear voltage display driver reference voltage trimming circuit is by resistance R ₇, R ₈, potentiometer W ₂And resistance R ₉, R ₁₀, potentiometer W ₃Constitute potentiometer W ₂, W ₃Be respectively the linear voltage display driver IC ₁And IC ₂The reference voltage trimmer potentiometer, 20 high-luminous-efficiency diode (LED)s ₁To LED ₂₀Corresponding with the display scale (7) of casing (15) front panel, be arranged in from top to down in the casing (15).The Sensor Analog Relay System voltage increment is through K switch _2-1Switching is again through R ₄, R ₅, R ₆Wherein one of dividing potential drop, drive the linear voltage display driver IC ₁And IC ₂, make high-luminous-efficiency LED ₁To LED ₂₀Do luminous demonstration for wherein one.Indicator circuit is by circular LED ₀₁, LED ₀₂, LED ₀₃, LED ₀₄, LED ₀₅And K switch _2-2Constitute LED ₀₁Be absolute measurement zero indication (16), LED ₀₅Be relative measurement zero indication (9), LED ₀₃, LED ₀₄, LED ₀₅, be three range indications (10), K switch _2-1, K _2-2Be coaxswitch, be range selector (13).Power circuit compares power supply by probe power, and display power supply constitutes.By battery E ₁, K switch _1-1, DC boosting thick film spare N ₁And annex formation probe power, by battery E ₂, K switch _1-2, DC boosting thick film spare N ₂And the annex constituent ratio is than power supply, by battery E ₃, K switch _1-3And annex constitutes display power supply, K switch _1-1, K _1-2, K _1-3Be coaxswitch, promptly be power switch (12), DC boosting thick film spare N ₁, N ₂System makes DC boosting in order to reduce supplying cell quantity, dwindles the volume of casing (15).In addition, the capacitor C in the survey magnetic circuit ₁And C ₂Effect be to suppress external interference and get rid of the higher-order of oscillation that produces.

Claims (2)

1, the luminous demonstration teslameter of a kind of pocket, by casing (15), probe (1), probe arm (2), probe off line button (4), sensor voltage input socket (5) and survey magnetic circuit constitute, surveying magnetic circuit is placed in the casing (15), probe (1) flexibly connects by a rotating shaft and probe arm (2) one ends, probe (1) can be done rotating in 0 °-90 ° relative to the arm of popping one's head in (2) axis, probe (1) is gone up and is indicated the magnetic induction density direction, probe (1) connects by the survey magnetic circuit in the feeder line in the probe arm (2) and sensor voltage socket (5) and the casing (15), probe arm (2) other end links to each other with casing (15) by probe off line button (4), it is characterized in that probe (1), probe arm (2), probe off line button (4), sensor voltage input socket (5) is placed in the left side of casing (15) front panel, probe guard shield (3) covers on probe (1), probe arm (2) and probe off line button (4) outside, range selector (13) power switch (12) and zeroing knob (14) are installed on casing (15) right panel from top to down, three range indications (10) are placed in the upper right position with the corresponding casing of range selector (13) (15) front panel, with three range indications (10) difference, three range scales of corresponding arrangement (11).

2, the luminous demonstration teslameter of pocket according to claim 1, it is characterized in that casing (15) the front panel central authorities position of taking back, from top to bottom settle 20 display scales (7), corresponding absolute measurement scale (6) and the relative measurement scale (8) of settling in its both sides.

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