CN218974570U - Magnetic flux density measurer - Google Patents
Magnetic flux density measurer Download PDFInfo
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- CN218974570U CN218974570U CN202222837065.4U CN202222837065U CN218974570U CN 218974570 U CN218974570 U CN 218974570U CN 202222837065 U CN202222837065 U CN 202222837065U CN 218974570 U CN218974570 U CN 218974570U
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Abstract
The utility model provides a magnetic flux density measurer which is light in weight, small in size, capable of further improving the visibility of a display part and easy to use. The magnetic flux density measuring instrument is characterized by comprising a probe having a Hall element mounted thereon, a probe holder for holding the probe and having a communication cable for transmitting measurement data to a main body, and the main body is provided with an input unit for inputting the measurement data, a signal conversion unit for converting the measurement data into magnetic flux density values, a display unit for displaying the magnetic flux density values, a plurality of external output units for externally outputting the magnetic flux density values, a storage unit, an operation button, a buzzer, and a control unit, wherein the display unit is capable of displaying the magnetic flux density values in upper and lower layers, and the control unit causes the upper layer of the display unit to display the magnetic flux density values and causes the lower layer to display the maximum value of the magnetic flux density values when a holding function is selected by operation of the operation button.
Description
Technical Field
The present utility model relates to a magnetic flux density measuring instrument.
Background
A magnetic flux density measurer called tesla meter is widely known. As such a magnetic flux density measuring instrument, for example, a portable structure as disclosed in non-patent document 1 is known.
Prior art literature
Non-patent literature
Non-patent document 1: teslameter TM-801 from Kanetec corporation
http://www.kanetec.co.jp/products/tm-801.html
Disclosure of Invention
Problems to be solved by the utility model
The magnetic flux density measuring instrument disclosed in non-patent document 1 is lightweight and small and has a large display section, and the frequency measurable range of the magnetic flux density is large, and therefore, the instrument can be suitably used for a long period of time, but further improvement in performance is expected.
Solution for solving the problem
The present utility model has been made to solve the above-described problems, and its object is as follows. That is, an object is to provide a magnetic flux density measuring instrument which is lightweight and small, further improves the visibility of a display portion, and is easier to use.
The inventors have made intensive studies to solve the above problems, and as a result, have conceived the following configurations. That is, the magnetic flux density measuring instrument of the present utility model includes: a probe having a hall element mounted on a distal end portion thereof; a probe holder that holds the probe and has a transmission part that transmits measurement data of the hall element to a main body; and a main body portion including an input portion for inputting the measurement data transmitted from the transmitting member, a signal conversion portion for converting the measurement data input from the input portion into a magnetic flux density value, a display portion for displaying the magnetic flux density value, a plurality of external output portions for externally outputting the measurement data or the magnetic flux density value, a storage portion, an operation button, a buzzer, and a control portion, wherein the display portion is capable of displaying the magnetic flux density value in upper and lower layers, and the control portion causes the upper layer to display the magnetic flux density value at the time of measurement and causes the lower layer to display a maximum value of the magnetic flux density values measured during a period from a start of measurement to the time of measurement when a measurement mode is selected by an operation of the operation button.
Since the display unit is small and lightweight and has a large display unit, and two layers of magnetic flux density values can be displayed, the magnetic flux density values are excellent in visibility, and the usability is improved.
It is also preferable that, when a detection mode is selected by an operation of the operation button and an upper limit value and a lower limit value of the magnetic flux density value are input to the storage unit, the control unit causes the buzzer to operate when the measurement data input from the input unit is within a range of a value corresponding to the upper limit value of the magnetic flux density value and a value corresponding to the lower limit value of the magnetic flux density value, or when the magnetic flux density value converted from the measurement data by the signal conversion unit is within a range of the upper limit value of the magnetic flux density value and the lower limit value of the magnetic flux density value.
Thus, by measuring the magnetic flux density, a portion located in an arbitrarily set range of the magnetic flux density can be easily detected. Since the buzzer is operated without checking the magnetic flux density value of the display unit, the operation efficiency in detecting the predetermined magnetic flux density range can be improved.
It is also preferable that a holder holding flat surface portion composed of at least 1 set of parallel flat surface portions and a user holding portion composed of a partial concave portion arranged in the holder holding flat surface portion are formed on an outer surface of the probe holder.
Thus, the probe holder can be held by the clamper, and the magnetic flux density can be easily measured. Further, by clearly grasping the grasping portion of the probe holder by the user, the probe holder can be accurately held, and breakage of the probe holder due to excessive force can be prevented.
It is also preferable that a backlight is provided in the display section.
Thereby, the visibility of the display portion can be improved.
Preferably, the external output unit is an analog external output unit that outputs the measurement data or the magnetic flux density value as an analog value, and a digital external output unit that outputs the measurement data or the magnetic flux density value as a digital value, and an interface of the digital external output unit is TypeC of USB.
It is also preferable that the unit of the magnetic flux density value displayed on the display unit is switchable by the control unit to a tesla display or a gaussian display.
Thus, the magnetic flux density measuring instrument is easier to use.
ADVANTAGEOUS EFFECTS OF INVENTION
By adopting the structure of the magnetic flux density measuring device of the present utility model, a large display part is provided while being small and lightweight, two-layer display of the magnetic flux density value can be performed, visibility of the magnetic flux density value is excellent, and usability can be improved.
Drawings
Fig. 1 is an overall configuration diagram of a magnetic flux density measuring instrument according to the present embodiment.
Fig. 2 is a left side view of the magnetic flux density measuring instrument main body of the present embodiment.
Fig. 3 is a plan view of the magnetic flux density measuring instrument main body according to the present embodiment.
Fig. 4 is a perspective view of the magnetic flux density measuring instrument main body according to the present embodiment.
Fig. 5 is a perspective view of the probe portion of the present embodiment.
Detailed Description
Embodiments of the present utility model will be specifically described below with reference to the drawings. As shown in fig. 1 to 5, the magnetic flux density measuring instrument 100 of the present embodiment includes a probe portion 200 and a main body 300, the probe portion 200 is detachably connected to the main body 300, and the main body 300 can display and output a measured value of the probe portion 200.
The probe portion 200 of the present embodiment has a probe 210 and a probe holder 220. A hall element 212 for measuring magnetic flux density is attached to the tip of the probe 210, and a scale 214 is provided on the upper surface of the probe 210 along the longitudinal direction of the probe 210, and the scale 214 represents a distance from a reference position of the probe holder 220.
The probe holder 220 has a probe mounting portion 222 to which the probe 210 is mounted and a communication cable 224 as a transmission member, and the communication cable 224 is connected to the probe holder 220 to transmit measurement data of the hall element 212 to the main body 300.
The probe holder 220 of the present embodiment has a hexahedral shape with an outer surface formed with 3 sets of parallel planar portions 223. At least 1 group (2 groups in the present embodiment) of the 3 groups of flat portions 223 is formed as a holder holding flat portion 223A whose flat portion is wide. A probe attachment portion 222 is formed on one surface of the remaining 1-group planar portion 223, and a communication cable 224 is connected to the other surface, and the probe 210 is attached to the probe attachment portion 222 so as to be capable of being inserted and removed.
By providing the probe holder 220 with a plurality of sets (2 sets in the present embodiment) of holder holding flat portions 223A on the outer surface, the probe holder 220 can be held in a stable state by holders not shown. This eliminates the need for the user to hold the probe holder 220, and reduces the burden on the user when using the magnetic flux density measuring device 100. Further, since the concave portion 223B as the user grip portion is formed in a part of the holder holding flat portion 223A, the burden of measuring the magnetic flux density in a state where the user holds the probe holder 220 can be reduced. Further, by providing the recess 223B on the outer surface of the probe holder 220, the user can accurately hold the probe holder 220. Accordingly, a force greater than necessary can be prevented from acting on the hall element 212 attached to the tip of the probe 210. The concave portions 223B of the present embodiment are disposed at two positions on the outer surface of the probe holder 220 in a state of facing each other, but may be disposed at only one position.
The display portion 310, the operation button portion 320, the input portion 330, and the external output portion 340 are disposed on the outer surface of the main body 300. The signal conversion unit 350, the storage unit 360, the buzzer 370, the battery 375, and the control unit 380 are housed in the internal space of the main body 300.
The display unit 310 of the present embodiment is a liquid crystal display unit, and can display magnetic flux density values and the like on the upper and lower layers of the display surface 312 of the display unit 310. The display unit 310 is formed in a protruding portion protruding from the upper surface side of the main body 300 in a state in which the display surface 312 is inclined with respect to the arrangement surface (upper surface of the main body 300) of the operation button 322, and visibility of the display surface 312 is improved. Further, the backlight 314 is disposed in the display unit 310, so that the display content on the display surface 312 can be visually confirmed reliably even outdoors in daytime on a sunny day. When the user presses a MODE/LIGHT button 322B, out of a plurality of operation buttons 322 constituting the operation button portion 320, the control portion 380 turns on the backlight 314 to irradiate LIGHT to the display portion 310. When the backlight 314 is to be turned off, the mode/light button 322B may be pressed again for a long time.
The operation button portion 320 is composed of a plurality of operation buttons 322 (322A to 322F) arranged on the upper surface of the main body 300. When the user presses the operation buttons 322 (322A to 322F) associated with the purpose of use, the control unit 380 controls the operation of each structure of the magnetic flux density measuring device 100. Since the respective associated operation contents are displayed in text on the surfaces of the operation buttons 322 (322A to 322F), the user can easily operate the magnetic flux density measuring device 100. Further, on the upper surfaces of the operation buttons 322 (322A to 322F), protrusions indicating the respective associated operation contents are arranged.
In the input unit 330 of the present embodiment, the communication cable 224 of the probe unit 200 is detachable from the input unit 330, and the input unit 330 can input the measurement data of the hall element 212 to the storage unit 360. Here, the transmission means for transmitting the measurement data to the main body 300 is the communication cable 224, and thus the input unit 330 connectable to the communication cable 224 is used, but the present utility model is not limited to this configuration. In the case of using a wireless transmission unit as the transmission unit, the input unit 330 may use a wireless reception unit. In this case, the structure of the communication cable 224 can be omitted.
The external output unit 340 outputs the measurement data input from the input unit 330 or the magnetic flux density value converted by the signal conversion unit 350 based on the measurement data input from the input unit 330 to an external personal computer, not shown. The magnetic flux density measuring device 100 according to the present embodiment is provided with a plurality of (2 in this case) external output units 340, one of which is an analog external output unit 340A and the other of which is a digital external output unit 340B. As an interface of the digital external output unit 340B, USB-TypeC is preferably used.
The storage unit 360 stores the measurement data input from the input unit 330, the magnetic flux density value converted by the signal conversion unit 350 based on the measurement data input from the input unit 330, and other control programs of the upper limit value and the lower limit value of the magnetic flux density in the detection mode, which will be described later. The storage unit 360 can preferably use a nonvolatile memory typified by a flash memory. The control program is stored in a ROM as a part of the storage section 360.
The control unit 380 controls the operation of each structure of the magnetic flux density measuring device 100 based on the operation contents associated with each operation button 322 (322A to 322F). In the present embodiment, the control unit 380 is configured by a CPU and a control program stored in the ROM of the storage unit 360.
Next, a method of using the magnetic flux density measuring instrument 100 according to the present embodiment will be described. When the user presses the ON/OFF button 322A, the control unit 380 activates the magnetic flux density measuring device 100. The control unit 380 switches the on/off state of the magnetic flux density measuring device 100 every time the user presses the on/off button 322A. When the measurement mode is selected in the magnetic flux density measuring device 100, the holding value stored in the storage unit 360 is kept stored. The hold value stored in the storage unit 360 can be eliminated by pressing ZERO/RESET (ZERO/RESET). When the user presses the mode/light button 322B, the control unit 380 performs processing of selecting a range setting (here, 1 time of dc, 10 times of dc, or 3 times of ac) in the measurement mode set in advance and setting a resolution change of the selected range. The control unit 380 performs a process of switching the on/off operation of the backlight 314 every time the user presses the mode/light button 322B for a long time.
When a user presses a COUNT UP button 322C, numbers of 0 to 9 are displayed on the display unit 310 and counted at the time of setting the upper limit value and the lower limit value of the magnetic flux density value in the detection mode. The user can select a desired number by pressing a DETECT/SET button 322E in a state where the number is displayed on the display section 310. The control unit 380 executes processing of setting the upper limit value and the lower limit value of the magnetic flux density value in the detection mode based on the number selected by the user in this way. When the user presses the zero/reset button 322D, the control unit 380 performs processing for setting the display of the real-time value and the hold value of the display unit 310 to zero display (zero setting: zero point adjustment). Further, when the zero/reset button 322D is pressed for a long time, the automatic power-off function of the magnetic flux density measuring instrument 100 is canceled.
The control unit 380 performs a process of switching the magnetic flux density measuring instrument 100 to the measurement mode or the detection mode every time the user presses the detection/setting button 322E. When the user presses the detection/setting button 322E for a long time after the control unit 380 switches the magnetic flux density measuring device 100 to the detection mode, the control unit 380 performs a process of setting the upper limit value and the lower limit value of the measuring range and the magnetic flux density measured value in the detection mode.
The digit/POLARITY (digit/POLARITY) button 322F is used to set the digit of the measured value displayed on the display unit 310 when setting the upper limit value and the lower limit value of the magnetic flux density value in the detection mode. After the number of bits/polarity button 322F is pressed, the user presses the count button 322C and the detection/setting button 322E, whereby the control unit 380 performs a process of setting the number of bits of the measurement value displayed on the display unit 310. In addition, by pressing the detection/setting button 322E, the storage of the maximum measurement value and the polarity thereof is maintained by the storage section 360. Thus, even in the case where the detection mode is performed after the measurement mode, the maximum measurement value stored in the storage unit 360 and the polarity thereof can be displayed on the display unit 310 when the number of bits/polarity button 322F is pressed long. Further, by pressing the zero/reset button 322D, the maximum measurement value stored in the storage section 360 and the polarity thereof are set to zero (zero point adjustment).
When the battery cover 390 on the rear surface of the main body 300 is removed, a notch (not shown) is provided in the claw insertion opening of the battery cover 390 of the main body 300, and a finger-operated (DIP) switch (not shown) is disposed so as to be operable from the notch. When the user removes the battery cover 390 from the main body 300 and slides the dial switch, the control unit 380 performs a process of switching the unit of the magnetic flux density value to be displayed on the display unit 310 to gaussian or tesla. As described above, the magnetic flux density measuring device 100 according to the present embodiment can arbitrarily switch the units of the magnetic flux density value according to the user's request.
Specific operations in each measurement mode of the magnetic flux density measuring device 100 according to the present embodiment will be described. The user presses the on/off button 322A to turn on the power of the magnetic flux density measuring device 100. When the user presses the detection/setting button 322E to select the measurement mode, the control unit 380 displays a magnetic flux density value corresponding to the measurement data on the upper layer of the display unit 310 based on the measurement data of the hall element 212. When the measurement mode is selected, the measurement data of the hall element 212 is often converted into a magnetic flux density value by the signal conversion unit 350, and output to the upper layer of the display unit 310.
The control unit 380 in the state where the measurement mode is selected first stores the magnetic flux density value corresponding to the measurement data as the current measurement value in the storage unit 360 based on the measurement data of the hall element 212. When the current measurement value is the initial measurement value, the control unit 380 stores the current measurement value as the maximum measurement value in the storage unit 360. The control unit 380 causes the maximum measurement value stored in the storage unit 360 to be displayed as a hold value on the lower layer of the display unit 310. At this time, the control unit 380 causes the "hold" to be displayed on the lower layer of the display unit 310.
When the user moves the probe 210, new measurement data is measured by the hall element 212 and the measurement data is input from the input section 330. Then, the control unit 380 causes the signal conversion unit 350 to convert the new measurement data into the magnetic flux density value, and then updates the current measurement value of the storage unit 360 and outputs the reconverted current measurement value to the upper layer of the display unit 310. At the same time, the control unit 380 compares the maximum measurement value of the storage unit 360 with the current measurement value, and when the maximum measurement value is equal to or greater than the current measurement value, the control unit maintains the maximum measurement value of the storage unit 360 and displays the maximum measurement value at the lower layer of the display unit 310. On the other hand, in the case where the maximum measurement value is smaller than the current measurement value, the maximum measurement value of the storage section 360 is updated to the current measurement value and the updated maximum measurement value is displayed at the lower layer of the display section 310.
By repeating the above operation, the magnetic flux density value at the current time of the measurement site of the user and the maximum magnetic flux density value in the measurement range can be simultaneously outputted to the upper and lower sides of the display unit 310. When the user presses the number of bits/polarity button 322F for a long time in the state where the measurement mode is selected, the control unit 380 causes the display unit 310 to flash and display the magnetic N or S of the maximum measurement value stored in the storage unit 360. The measurement data of the hall element 212 includes numerical data of the magnetic flux density and magnetic pole data, and the signal conversion unit 350 calculates the magnetic flux density value and the magnetic pole from the measurement data, and the control unit 380 causes the current measurement value and the maximum measurement value of the magnetic flux density value and the magnetic pole to be stored in the storage unit 360.
On the other hand, when the detection mode is selected by pressing the detection/setting button 322E, the control unit 380 displays "detection" on the display unit 310 and outputs a screen prompting the user to input the upper limit value and the lower limit value of the detection target range of the magnetic flux density value. At this time, the control unit 380 performs processing for causing the display unit 310 to flash and display "H" when the upper limit value is entered, and causing the display unit 310 to flash and display "L" when the lower limit value is entered. When the user inputs the upper limit value and the lower limit value by operating the count button 322C, the control unit 380 causes the storage unit 360 to store the upper limit value and the lower limit value of the detection target range, respectively. When the user touches the hall element 212 of the probe 210 to an arbitrary position in the detection mode, measurement data of the position is sent from the input unit 330 to the signal conversion unit 350. Further, the control unit 380 performs processing for causing the display unit 310 to alternately display the upper limit value and "H" of the detection target range of the magnetic flux density value input before and the lower limit value and "L" of the detection target range of the magnetic flux density value at the time of starting the measurement in the detection mode. When the signal conversion unit 350 converts the measurement data into the magnetic flux density value, the control unit 380 determines whether or not the converted magnetic flux density value is within the range of the upper limit value and the lower limit value of the detection target range stored in the storage unit 360.
When the converted magnetic flux density value is within the range of the upper limit value and the lower limit value of the detection target range, the control unit 380 causes the buzzer 370 to operate, and notifies the user that the magnetic flux density value at the current position is within the range of the upper limit value and the lower limit value of the detection target range by sound. On the other hand, when the converted magnetic flux density value is out of the range of the upper limit value and the lower limit value of the detection target range, the control unit 380 stops the buzzer 370, and notifies the user that the magnetic flux density value at the current position is out of the range of the upper limit value and the lower limit value of the detection target range by making silent. In this way, when the user using the magnetic flux density measuring device 100 according to the present embodiment does not check the display unit 310 in the detection mode, it is possible to check whether or not the magnetic flux density value of the measurement object is within the preset numerical range, based on the presence or absence of the sound of the buzzer 370. Therefore, the user can perform the inspection of the magnetic flux density value of the measurement object extremely efficiently.
The control unit 380 determines whether or not the magnetic flux density value obtained by converting the measurement data of the hall element 212 is within the range of the upper limit value and the lower limit value of the detection target range stored in the storage unit 360, but is not limited to this configuration. The control unit 380 may determine whether or not the value of the measurement data of the hall element 212 is within a range of a value corresponding to the upper limit value of the detection target range of the magnetic flux density value and a value corresponding to the lower limit value of the detection target range of the magnetic flux density value. In this case, when the value of the measurement data is within the range of values corresponding to the upper limit value and the lower limit value of the detection target range, the control unit 380 causes the buzzer 370 to operate, and notifies the user that the value of the measurement data at the current position is within the range of values corresponding to the upper limit value and the lower limit value of the detection target range by sound. In contrast, when the value of the measurement data is out of the range of values corresponding to the upper limit value and the lower limit value of the detection target range, the control unit 380 stops the buzzer 370, and notifies the user that the value of the measurement data at the current position is out of the range of values corresponding to the upper limit value and the lower limit value of the detection target range by making silent. The magnetic flux has an N pole (+) and an S pole (-), but only the absolute value of the magnetic flux density value is detected in the detection mode.
The user can switch the backlight 314 on and off by pressing the mode/light button 322B at the time of the measurement mode and the detection mode. When the user presses the mode/light button 322B in the measurement mode, the range can be set, and the resolution of the measurement data can be selected. When the user presses the zero/reset button 322D in the measurement mode and in the detection mode, the display of the display unit 310 at this time can be set to zero.
The magnetic flux density measuring device 100 can output measurement data or magnetic flux density data to an external connection device such as a personal computer, not shown, via a communication cable connected to the external output unit 340. The user can select either one of the analog external output portion 340A and the digital external output portion 340B according to the external connection device.
While the magnetic flux density measuring instrument 100 according to the present embodiment has been described above, the magnetic flux density measuring instrument 100 according to the present utility model is not limited to the above-described embodiment, and a configuration in which a specific configuration is appropriately changed may be adopted within the scope of the present utility model.
Claims (6)
1. A magnetic flux density measuring device is characterized in that,
the magnetic flux density measuring device is provided with:
a probe having a hall element mounted on a distal end portion thereof;
a probe holder that holds the probe and has a transmission part that transmits measurement data of the hall element to a main body; and
a main body part provided with an input part for inputting the measurement data sent from the sending part, a signal conversion part for converting the measurement data input from the input part into a magnetic flux density value, a display part for displaying the magnetic flux density value, a plurality of external output parts for outputting the measurement data or the magnetic flux density value externally, a storage part, an operation button, a buzzer and a control part,
the display unit can display the magnetic flux density value in upper and lower layers,
in the case where the measurement mode is selected by the operation of the operation button,
the control unit causes an upper layer to display the magnetic flux density value at the time of measurement, and causes a lower layer to display the maximum value of the magnetic flux density values measured during a period from the time of measurement start to the time of measurement.
2. The magnetic flux density measuring instrument according to claim 1, wherein,
in the case where the detection mode is selected by the operation of the operation button and the upper limit value and the lower limit value of the magnetic flux density value are input to the storage portion respectively,
the control unit operates the buzzer when the measurement data input from the input unit is within a range of a value corresponding to the upper limit value of the magnetic flux density value and a value corresponding to the lower limit value of the magnetic flux density value, or when the magnetic flux density value converted from the measurement data by the signal conversion unit is within a range of the upper limit value of the magnetic flux density value and the lower limit value of the magnetic flux density value.
3. The magnetic flux density measuring instrument according to claim 1 or 2, wherein,
a holder holding flat surface portion composed of at least 1 group of parallel flat surface portions and a user holding portion composed of a partial concave portion arranged on the holder holding flat surface portion are formed on the outer surface of the probe holding body of the probe holder.
4. The magnetic flux density measuring instrument according to claim 1 or 2, wherein,
the display unit is provided with a backlight.
5. The magnetic flux density measuring instrument according to claim 1 or 2, wherein,
the external output unit is an analog external output unit that outputs the measurement data or the magnetic flux density value as an analog value and a digital external output unit that outputs the measurement data or the magnetic flux density value as a digital value,
the interface of the digital external output part is a typeC of USB.
6. The magnetic flux density measuring instrument according to claim 1 or 2, wherein,
the unit of the magnetic flux density value displayed on the display unit can be switched to a tesla display or a gaussian display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222837065.4U CN218974570U (en) | 2022-10-27 | 2022-10-27 | Magnetic flux density measurer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222837065.4U CN218974570U (en) | 2022-10-27 | 2022-10-27 | Magnetic flux density measurer |
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| CN218974570U true CN218974570U (en) | 2023-05-05 |
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| CN202222837065.4U Active CN218974570U (en) | 2022-10-27 | 2022-10-27 | Magnetic flux density measurer |
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