JP2016020829A - Measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of changing over a measurement range while reducing the number of change-over switches.SOLUTION: A measuring apparatus comprises a plurality of change-over switches 11a-11e, and a processing part. Three measurement ranges are assigned to specified change-over switches 11a, 11b, 11d, 11e of the change-over switches 11. In range changeover processing when an operation is made to the specified change-over switch, the processing part, as a new measurement range, changes over one of the measurement ranges assigned to the operated change-over switches 11 to the measurement range when the change-over switches 11 other than the change-over switches 11 to which the current measurement range is assigned are operated. When the change-over switches 11 to which the current measurement range is assigned are operated, the processing part changes over, as a new measurement range, the measurement range assigned to the operated change-over switch 11 to the measurement range in a predetermined order.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a measurement apparatus that switches a current measurement range among a plurality of measurement ranges to a new measurement range by a changeover switch.

  As this type of measuring apparatus, a measuring apparatus disclosed as background art in Patent Document 1 below is known. This measuring apparatus includes an UP key, a DOWN key, and a range display unit. In this measurement apparatus, for example, when the current measurement range among a plurality of measurement ranges of 15 V, 30 V, 60 V, 100 V, 150 V, 300 V, 600 V, and 1000 V is switched to a desired measurement range, the range display unit While confirming the displayed current measurement range, the UP and DOWN keys are operated to change the current measurement range step by step, thereby switching to the desired measurement range. For example, when the range is switched from the current 30 V measurement range to the desired 600 V measurement range, the user switches to the desired measurement range by pressing the UP key five times while checking the current measurement range.

JP 2009-85896 A (2nd page, FIG. 6)

  However, the above measuring apparatus has the following problems to be improved. That is, in this measuring apparatus, when the range is switched, if the desired measurement range is close to the current measurement range, the range can be switched to the desired measurement range with a small number of operations on the UP key and the DOWN key. When the measurement range is far from the current measurement range, the number of operations for the UP key and DOWN key increases (because it passes through many measurement ranges that are not required), which improves the efficiency of range switching work. There are issues to be addressed.

  In order to improve this problem, a configuration is also possible in which a changeover switch is provided corresponding to each of a plurality of measurement ranges. In this configuration, the same number of changeover switches as the number of measurement ranges are provided on the front panel of the measurement apparatus. As a result, a large space for disposing the changeover switch is required for the front panel. As a result, another problem to be improved that the front panel is increased in size occurs.

  The present invention has been made to improve such a problem, and a main object of the present invention is to provide a measurement apparatus capable of improving the efficiency of the measurement range switching operation while reducing the number of changeover switches.

  In order to achieve the above object, the measurement apparatus according to claim 1 is configured to change a current measurement range among a plurality of measurement ranges to a new measurement range based on a changeover switch, a range display unit, and an operation content on the changeover switch. And a processing unit that executes a range switching process that causes the range display unit to display the new measurement range as a new current measurement range, and includes a plurality of the changeover switches. Two or more of the measurement ranges are assigned to at least a plurality of specific changeover switches among the plurality of changeover switches, and the processing unit performs the current switching in the range changeover process when operating the specific changeover switch. When a switch other than the switch to which the measurement range is assigned is operated When one of the measurement ranges assigned to the changeover switch is switched to the new measurement range as the new measurement range, and the changeover switch assigned to the current measurement range is operated, The measurement range assigned to the operated changeover switch is switched to the new measurement range as the new measurement range in a predetermined order.

  According to a second aspect of the present invention, in the measurement apparatus according to the first aspect, the same number of the measurement ranges are assigned to the specific changeover switch.

  According to a third aspect of the present invention, in the measurement apparatus according to the first or second aspect, the processing unit includes the plurality of measurement ranges as one of the plurality of measurement ranges assigned to the operated changeover switch. The measurement range closest to the current measurement range is set as the new measurement range.

  According to a fourth aspect of the present invention, in the measurement apparatus according to the first or second aspect, the processing unit is configured to use the plurality of measurement ranges as one of the plurality of measurement ranges assigned to the operated changeover switch. Any one of the maximum measurement range and the minimum measurement range is set as the new measurement range.

  The measurement apparatus according to claim 5 is the measurement apparatus according to any one of claims 1 to 4, wherein the specific changeover switch is assigned three or more measurement ranges, and the processing unit is configured to perform the specific changeover. In the range switching process at the time of an operation on a switch, the measurement range assigned to the operated changeover switch is set as the new measurement range in either ascending order or descending order as the predetermined order. However, in the case of ascending order, when the maximum measurement range of the assigned measurement range is the current measurement range, the smallest measurement range of the assigned measurement range is set as the new measurement range, In the descending order, the smallest measurement range among the assigned measurement ranges is the current measurement range. The can be the maximum the new measurement range the measurement range of the measurement range assigned the.

  The measurement apparatus according to claim 6 is the measurement apparatus according to any one of claims 1 to 4, wherein the specific changeover switch is assigned three or more measurement ranges, and the processing unit is configured to perform the specific changeover. In the range switching process at the time of an operation on a switch, the measurement range assigned to the operated changeover switch is set as the new measurement range in an order in which the ascending order and the descending order are alternately repeated as the predetermined order. .

  The measurement apparatus according to claim 7 is the measurement apparatus according to any one of claims 1 to 6, wherein the measurement range assigned to the changeover switch is indicated in the vicinity of the changeover switch itself or the changeover switch. Numbers are shown.

  In the measurement apparatus according to claim 1, the processing unit is operated when a changeover switch other than the changeover switch to which the current measurement range is assigned is operated in the range changeover process when operating the specific changeover switch. When one of the measurement ranges assigned to the changeover switch is switched to this new measurement range as a new measurement range and the changeover switch assigned to the current measurement range is operated, The measurement range assigned to the switch is switched to this new measurement range as a new measurement range in a predetermined order.

  Therefore, according to this measurement device, the number of changeover switches can be greatly reduced compared to a measurement device having a configuration in which a changeover switch is individually provided corresponding to each of a plurality of measurement ranges. Compared with a measurement apparatus configured to switch the measurement range by operating the DOWN key or the DOWN key, it is possible to switch to the desired measurement range in a state where the number of operations for the changeover switch is significantly reduced.

  In addition, according to the measuring apparatus of the second aspect, since the same number of measurement ranges are assigned to a plurality of specific changeover switches, the number of assigned at the maximum in the plurality of specific changeover switches. It is possible to switch to a desired measurement range simply by operating the same number of switches.

  Further, according to the measuring device of claim 3 or 4, when an operation is performed on a changeover switch to which the current measurement range is not assigned, a plurality of measurement ranges assigned to the changeover switch are selected. The end measurement range (minimum measurement range or maximum measurement range) can always be determined first as a new measurement range. For this reason, according to this measuring apparatus, the user is always allowed to start range switching starting from the end measurement range (maximum measurement range or minimum measurement range) (that is, the subsequent measurement range is moved). Since range switching can be started in a state where the direction can be easily grasped intuitively), it is possible to greatly reduce erroneous operations such as overshooting the desired measurement range.

  In addition, according to the measurement device of claim 5 or 6, when an operation is performed on the changeover switch to which the current measurement range is assigned, the ascending order or descending order and the ascending order are defined as the predefined order. Since a new measurement range is determined in an order in which the switching operation is easy to predict for the user, such as an order in which the descending order and the descending order are repeated alternately, it is possible to greatly reduce erroneous operations such as overshooting the desired measurement range. .

  In addition, according to the measurement device of the seventh aspect, the number indicating the measurement range assigned to each change-over switch is indicated in the vicinity of each change-over switch itself or in each change-over switch. Using the numbers as a guide, it is possible to reliably operate the changeover switch to which the desired measurement range is assigned.

1 is a configuration diagram of a measuring device 1. FIG. It is a front view of the measuring apparatus 1 for demonstrating the structure of the front panel FP of the measuring apparatus 1. FIG. It is a front view of measuring device 1A for explaining composition of front panel FP of measuring device 1A.

  Hereinafter, embodiments of a measuring apparatus will be described with reference to the accompanying drawings.

  First, the configuration of the measuring apparatus will be described with reference to the drawings.

  A measuring apparatus 1 as a measuring apparatus shown in FIG. 1 includes, as an example, an input unit 2, a range switching unit 3, an A / D conversion unit 4, a processing unit 5, a storage unit 6, an output unit 7, and a plurality (in this example, an example) 5) change-over switches 11a, 11b, 11c, 11d, and 11e (hereinafter also referred to as change-over switch 11 when not particularly distinguished) and a range display unit 21, and a detected amount (in this example) for the input signal S1 As an example, a voltage signal waveform of the input signal S1 that is an analog voltage signal) is measured in a desired measurement range among a plurality of measurement ranges and can be output. In this example, as an example, the measuring apparatus 1 has an arbitrary measurement of 14 measurement ranges of 1 mV, 2 mV, 5 mV, 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 1 V, 2 V, 5 V, 10 V, 20 V, and 50 V. It is configured to be switchable to the range.

  For example, the input unit 2 is configured by a bandpass filter that selectively allows the signal component of the input signal S1 to pass therethrough, and is disposed in the casing CA (see FIG. 2). When a noise component is included in an input signal S1 input via an input terminal (not shown) provided on a wall surface (not shown) to be configured, the noise component is removed and output. The range switching unit 3 is disposed in the casing CA and amplifies the input signal S1 output from the input unit 2 with an amplification factor corresponding to the range signal Sra indicating the selected measurement range. Output as S2.

  The A / D conversion unit 4 is disposed in the casing CA, receives the amplified signal S2 and samples it, thereby converting it into waveform data D1 and outputting it. The processing unit 5 is configured by a computer disposed in the casing CA and operates based on an operation program stored in the storage unit 6 to thereby perform range selection processing, range switching processing, and waveform data storage processing. And execute the waveform data output process.

  As an example, the storage unit 6 is configured by a hard disk drive (HDD), a semiconductor memory such as a RAM, and the like, and is disposed in the housing CA. The storage unit 6 stores the operation program as described above and the initial value of the measurement range.

  As an example, the output unit 7 is configured by a display device such as an LCD (Liquid Crystal Display), and as illustrated in FIG. 2, the output unit 7 is provided on a wall surface FP (hereinafter also referred to as a front panel FP) positioned in front of the housing CA. It is arranged. The output unit 7 displays a waveform image of the input signal S1 on the screen based on the video signal Spi output from the processing unit 5. The output unit 7 may be configured by an external interface circuit instead of the display device or together with the display device, and outputting the video signal Spi and the waveform data D1 to the external device.

  Each change-over switch 11a, 11b, 11c, 11d, and 11e is comprised by the push-type switch, and as shown in FIG. 2, it arrange | positions in a line in this order along the left-right direction as an example on the front panel FP. Yes. Further, when the change-over switches 11a, 11b, 11c, 11d, and 11e are operated (pressed in this example), the press signals Ssa, Ssb, Ssc, Ssd, and Sse (hereinafter also referred to as a press signal Ss unless otherwise distinguished). 1 (see FIG. 1) are output to the processing unit 5, respectively. In addition, although not shown in figure, each changeover switch 11 is arrange | positioned along an up-down direction, arrange | positions in multiple rows along the left-right direction, or arrange | positions in multiple steps along an up-down direction. You can also. Further, in this example, as an example, the front shape of each changeover switch 11 is formed in the same square (square or rectangular), but the front shape is not limited to a square, and may be any shape such as a polygon, a circle, or an ellipse. It may be.

  In addition, two or more measurement ranges among the plurality of measurement ranges 1 mV to 50 V are assigned to a plurality of specific change-over switches 11 among the change-over switches 11 without overlapping. In this example, as an example, the change-over switches 11a, 11b, 11d, and 11e are the specific change-over switches 11, and m pieces have the same measurement range (m is an arbitrary integer greater than or equal to 2. In this example, 3 (= m) as an example. The other changeover switches 11 except for the changeover switches 11a, 11b, 11d, and 11e (in this example, there is only one changeover switch 11c as an example, but there are a plurality of other changeover switches 11). In some cases, the remaining measurement ranges (measurement ranges not assigned to a specific changeover switch 11) are assigned.

  Specifically, the change-over switches 11a, 11b, 11d, and 11e as the specific change-over switch 11 include three measurement ranges of 1 mV, 2 mV, and 5 mV, three measurement ranges of 10 mV, 20 mV, and 50 mV, 1 V, Three measurement ranges of 2V and 5V are assigned to three measurement ranges of 10V, 20V, and 50V, respectively. The remaining two measurement ranges of 100 mV and 200 mV are assigned to the changeover switch 11c as another changeover switch 11 (a changeover switch 11 that is not a specific changeover switch 11). That is, in this example, as an example, a measurement range is assigned to each changeover switch 11 so that the measurement range increases from the left side to the right side.

  Further, as shown in FIG. 2, the front panel FP has numbers (“1”, “2”,..., “200”, etc.) for clearly indicating the numerical values of the assigned measurement ranges. It is displayed in the vicinity of the changeover switch 11 (in this example, it is in the vicinity of the upper side of each changeover switch 11 but may be in the vicinity of the lower side, the right side, or the left side). Further, on the surface of each changeover switch 11, characters indicating the unit of the detected amount for the input signal S1 are displayed along with characters indicating the auxiliary unit of the assigned measurement range. For the measurement range without the auxiliary unit, only the characters indicating the unit of the detected amount are displayed. Here, the auxiliary unit in this example is a unit of an integer multiple of 10 having a unique name (for example, micro (μ), millimeter (m), etc.), and the unit of the detected amount is the main unit. In the example, since the detected amount is a voltage signal waveform as an example, it is volt (V). However, the detected amount is not limited to voltage, and may be current or power. When it is related to power, it is ampere (A), and when it is related to power, it is watt (W).

  In the measuring apparatus 1, with the above configuration, the numbers displayed in the vicinity of each changeover switch 11 and the characters indicating the units (or auxiliary units and units) displayed on the surface of each changeover switch 11 are displayed. Based on this, the user can recognize two or more measurement ranges assigned to each changeover switch 11.

  In the measurement apparatus 1, as described above, there are eight measurement ranges in mV units and six measurement ranges in V units, and the measurement ranges are reduced by three for a specific changeover switch 11. Since the measurement range is assigned to each unit (divided into mV and V units), three measurement ranges of 1 mV, 2 mV, and 5 mV and three measurement ranges of 10 mV, 20 mV, and 50 mV are specified. Are assigned to the two changeover switches 11a and 11b as the changeover switch 11, and three measurement ranges of 1V, 2V, and 5V and three measurement ranges of 10V, 20V, and 50V are used as the specific changeover switch 11. The remaining 100 mV of the measurement range in mV is assigned to the two change-over switches 11d and 11e and is assigned to the change-over switch 11c as the other change-over switch 11. A configuration is adopted in which two measurement ranges of 00 mV are assigned. However, if the measurement range in units of mV is nine plus 500 mV, three changeover switches 11a to 11c to which the measurement ranges in mV are assigned are set to 3 Measurement ranges can be assigned one by one. Therefore, in this case, all the changeover switches 11a to 11c are designated as specific changeover switches 11, and each changeover switch 11a to 11c has three measurement ranges of 1 mV, 2 mV, and 5 mV, and three of 10 mV, 20 mV, and 50 mV. It is possible to adopt a configuration in which one measurement range and three measurement ranges of 100 mV, 200 mV, and 500 mV are allocated.

  Also, if the measurement range in units of V is five from the above 6 to 50V measurement range, the changeover switch 11e is not a specific changeover switch 11, but as a specific changeover switch 11, a specific changeover switch. The other two measurement ranges of 10V and 20V other than the three measurement ranges of 1V, 2V, and 5V assigned to the changeover switch 11d that is 11 are assigned.

  Although not shown, instead of the above configuration, when there is an auxiliary unit in the measurement range together with a number for clearly indicating the numerical value of the assigned measurement range, the letters indicating the auxiliary unit are also used. A configuration that displays in the vicinity of each changeover switch 11 (for example, a configuration that displays “20 m” when the measurement range is 20 mV) may be employed. In this case, only the character indicating the unit of the detected amount is displayed on the surface of each changeover switch 11. In addition, although not shown in the figure, a character indicating the unit of the detected amount together with a number for clearly indicating the numerical value of the assigned measurement range, and when there is an auxiliary unit in the measurement range, a character indicating the auxiliary unit. A configuration that displays in the vicinity of each change-over switch 11 in a state of adding (for example, a configuration that displays “20 mV” when the measurement range is 20 mV) may be employed. In this case, since all the information of the number indicating the measurement range and the unit (the unit to which this auxiliary unit is added if there is an auxiliary unit) are displayed in the vicinity of each changeover switch 11, the surface of each changeover switch 11 is displayed. Can be configured not to display characters indicating the unit of the detected amount. Instead of this configuration, it is also possible to employ a configuration in which numbers and unit information indicating the measurement range are displayed (shown together) on both the vicinity of each changeover switch 11 and the surface of each changeover switch 11.

  As described above, when the measurement range assigned to each changeover switch 11 can be recognized including the auxiliary unit by the information displayed in the vicinity of each changeover switch 11 on the front panel FP, one changeover switch is provided. 11 can also be assigned with different measurement ranges of different auxiliary units. As an example, 13 measurement ranges of 1 mV, 2 mV, 5 mV, 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 1 V, 2 V, 5 V, 10 V, and 20 V are assigned to five change-over switches 11 a to 11 e and a specific change-over switch 11. When the three measurement ranges are assigned to the condition, the four change-over switches 11a to 11d are set as the specific change-over switch 11, and three measurement ranges of 1 mV, 2 mV, and 5 mV are assigned to the change-over switch 11a and 10 mV. , 20 mV, and 50 mV are assigned to the change-over switch 11b, and three measurement ranges of 100 mV, 200 mV, and 1 V are assigned to the change-over switch 11c, and the three measurement ranges of 2V, 5V, and 10V are assigned to the change-over switch 11d. And one remaining measurement range of 20V is assigned to a specific switching range. May be assigned to the remaining selector switch 11e is not a pitch 11.

  In the above example, a configuration in which information about the measurement range assigned to each change-over switch 11 is mainly displayed on the front panel FP is adopted. However, instead of this configuration, the assigned measurement range is used. It is also possible to display only numbers on the front surface of the changeover switch 11 (the changeover switch 11 itself) and to omit display in the vicinity of each changeover switch 11 on the front panel FP.

  For example, the range display unit 21 individually drives each LED based on the number of LEDs (Light Emitting Diodes) equal to the number of measurement ranges of the measurement apparatus 1 and a drive signal output from the processing unit 5. Drive circuit. In this example, as described above, since there are 14 measurement ranges of 1 mV, 2 mV, 5 mV, 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 1 V, 2 V, 5 V, 10 V, 20 V, and 50 V, 14 LEDs 22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h, 22i, 22j, 22k, 22m, 22n, and 22o (hereinafter also referred to as LED 22 unless otherwise distinguished). Further, the 14 LEDs 22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h, 22i, 22j, 22k, 22m, 22n, 22o have corresponding drive signals Sda, Sdb, Sdc, Sdd, Sde, Sdf, Driven based on Sdg, Sdh, Sdi, Sdj, Sdk, Sdm, Sdn, Sdo (hereinafter also referred to as drive signal Sd unless otherwise specified).

  Further, as shown in FIG. 2, the LED 22a is disposed in the vicinity of a number ("1") indicating a numerical value of the 1 mV measurement range on the front panel FP, and the LED 22b is a numerical value of the 2 mV measurement range on the front panel FP. The LED 22c is disposed in the vicinity of the number ("5") indicating the numerical value of the measurement range of 5 mV on the front panel FP. The LED 22d is disposed in the vicinity of a number ("10") indicating a numerical value of the 10 mV measurement range on the front panel FP, and the LED 22e is a numerical value ("20") indicating a numerical value of the 20 mV measurement range on the front panel FP. ), And the LED 22f is arranged in the vicinity of a number (“50”) indicating a numerical value of the measurement range of 50 mV on the front panel FP. The LED 22g is disposed in the vicinity of a number (“100”) indicating a value of the measurement range of 100 mV in the front panel FP, and the LED 22h is a number (“200”) indicating a value of the measurement range of 200 mV in the front panel FP. ).

  The LED 22i is disposed in the vicinity of a number ("1") indicating the value of the 1V measurement range on the front panel FP, and the LED 22j is a number ("2") indicating the value of the 2V measurement range on the front panel FP. The LED 22k is disposed in the vicinity of a number ("5") indicating the numerical value of the measurement range of 5V on the front panel FP. The LED 22m is arranged in the vicinity of a number ("10") indicating a value of the 10V measurement range on the front panel FP, and the LED 22n is a number ("20") indicating a value of the 20V measurement range on the front panel FP. The LED 22o is disposed in the vicinity of a number (“50”) indicating the numerical value of the measurement range of 50 V on the front panel FP.

  In this example, each LED 22 is arranged in the vicinity of the upper side as shown in FIG. 2 as the vicinity of the number indicating the value of the corresponding measurement range, but in the vicinity of the lower side, the left side and the right side. You may arrange in any. In addition, when the part where the number indicating the numerical value of the measurement range in the front panel FP is formed of a light-transmitting material (a light-transmitting synthetic resin material or glass material), the vicinity of the back of the number It is also possible to employ a configuration in which the LEDs 22 are arranged and the light is irradiated from the back side of the corresponding numbers. Moreover, it is also possible to adopt a configuration in which a line for associating each LED 22 with a number indicating the numerical value of the corresponding measurement range is added to the front panel FP by printing or the like.

  Next, the operation of the measuring apparatus 1 will be described.

  When the power of the measuring apparatus 1 is turned on, the processing unit 5 first reads the initial value of the measurement range from the storage unit 6 and executes range switching processing. In the range switching process, the processing unit 5 outputs the range signal Sra indicating the initial value to the range switching unit 3 and outputs only one drive signal Sd corresponding to the initial value to the range display unit 21. Only one LED 22 indicating this initial value is turned on for the range display unit 21. In this case, the initial value of the measurement range may be configured such that data indicating one measurement range defined in advance as the specification of the measurement apparatus 1 is fixedly stored, or the current value immediately before the power is turned off. The processing unit 5 may update and store the initial value in the storage unit 6 so that data indicating the current measurement range when the power is turned off may be stored.

  In the measuring apparatus 1, in the measuring apparatus 1, the input unit 2 removes the noise component from the input signal S <b> 1 input via the input terminal and outputs the signal, and the range switching unit 3 is output from the input unit 2. The input signal S1 is amplified at an amplification factor corresponding to the measurement range indicated by the range signal Sra output from the processing unit 5 and output as an amplified signal S2. Moreover, in the range display part 21, only LED22 arrange | positioned in the vicinity of this measurement range lights. The A / D converter 4 receives the amplified signal S2 and converts it into waveform data D1 and outputs it to the processor 5.

  The processing unit 5 executes the waveform data storage process to store the input waveform data D1 in the storage unit 6 and executes the waveform data output process, based on the waveform data D1 stored in the storage unit 6. The video signal Spi indicating the waveform image of the input signal S1 is generated and output to the output unit 7. The output unit 7 displays a waveform image of the input signal S1 on the screen based on the video signal Spi output from the processing unit 5. In this case, as described above, only the LED 22 arranged in the vicinity of the current measurement range is lit, and all the other LEDs 22 are lit off. Therefore, the user of the measuring apparatus 1 turns on the lit LED 22. It is possible to recognize that the measurement range displayed in the vicinity of is the current measurement range. For example, the user can recognize that the current measurement range is a measurement range of 2 mV when only the LED 22b is lit, and the current measurement range is a measurement range of 10V when only the LED 22m is lit. Can be recognized.

  Thereafter, the processing unit 5 detects whether or not the pressing signal Ss is output from the changeover switch 11 while executing the waveform data storage process and the waveform data output process. In this state, in order to switch the current measurement range to a desired measurement range, the user uses a number for clearly indicating the numerical value of the measurement range displayed in the vicinity of each changeover switch 11 as a guide. Press the selector switch 11 to which the measurement range is assigned. At this time, the selector switch 11 that has been pressed outputs a pressing signal Ss to the processing unit 5. When the processing unit 5 detects the output of the pressing signal Ss from the pressing signal Ss, the processing unit 5 performs a range selection process.

  In this range selection process, the processing unit 5 first detects (specifies) the selector switch 11 that has been pressed based on the input pressing signal Ss. Next, the processing unit 5 newly selects one of the measurement ranges assigned to the detection changeover switch 11 based on the detected changeover switch 11 (hereinafter also referred to as the detection changeover switch 11) and the current measurement range. The measurement range is determined, and the measurement range is switched to this new measurement range.

  Specifically, the processing unit 5 first determines whether or not the current measurement range is included in the measurement range assigned to the detected changeover switch 11. As a result of this determination, when determining that the current measurement range is not included in the measurement range assigned to the detection changeover switch 11, the processing unit 5 selects the measurement range assigned to the detection changeover switch 11. Is determined as a new measurement range based on a predetermined rule. In addition, when the processing unit 5 determines a new measurement range, the processing unit 5 performs range switching processing and outputs a range signal Sra indicating the new measurement range to the range switching unit 3. In contrast, the current measurement range is switched to the new measurement range, and only one drive signal Sd corresponding to the new measurement range is output to the range display unit 21, and the new display range is output to the range display unit 21. Only one LED 22 indicating the correct measurement range is turned on.

  In this case, as the above-mentioned predetermined rule for determining a new measurement range, the processing unit 5 can employ either the following first rule or second rule. According to the first rule, one measurement range among the measurement ranges assigned to the changeover switch 11 is determined in advance for each changeover switch 11 as the initial measurement range, and the processing unit 5 is connected to the detection changeover switch 11. When the measurement range other than the assigned measurement range is the current measurement range, when the measurement range assigned to the detection selector switch 11 is determined as a new measurement range, the initial measurement range is always set to a new one. Determine the measurement range.

  For example, in the configuration in which, for example, the smallest measurement range among the measurement ranges assigned to the changeover switch 11 is predetermined for each changeover switch 11 as the initial measurement range, the changeover switch 11c is pressed. When (when the detection changeover switch 11c is selected), in a state where the measurement range other than the measurement range assigned to the detection changeover switch 11c (for example, the measurement range of 1V) is the current measurement range, the processing unit 5 The measurement range of 100 mV, which is the initial measurement range of the detection changeover switch 11c, is determined as a new measurement range. Further, when the changeover switch 11e is pressed instead of the changeover switch 11c (in the case of the detection changeover switch 11e), the processing unit 5 measures a measurement range other than the measurement range assigned to the detection changeover switch 11e (for example, In the state where the measurement range of 1V is the current measurement range, the measurement range of 10V, which is the initial measurement range of the detection changeover switch 11e, is determined as a new measurement range. Instead of the above configuration in which the minimum measurement range is the initial measurement range, a configuration in which the maximum measurement range among the measurement ranges assigned to the changeover switch 11 is determined in advance as the initial measurement range is adopted. You can also.

  Further, according to the second rule, the processing unit 5 newly sets a measurement range closest to the current measurement range among a plurality of measurement ranges assigned to the pressed switch 11 (detection switch 11). Determine the correct measurement range. That is, when the current measurement range is larger than the measurement range assigned to the detection changeover switch 11, the processing unit 5 sets a new measurement range among the measurement ranges assigned to the detection changeover switch 11 to a new one. When the measurement range is determined and the current measurement range is smaller than the measurement range assigned to the detection changeover switch 11, the smallest measurement range of the measurement ranges assigned to the detection changeover switch 11 is newly measured. Determine as a range.

  For example, in the state where the measurement range of 1 V is selected as the current measurement range, when the changeover switch 11c to which a measurement range smaller than the current measurement range is assigned is pressed (current measurement). When the range is larger than the measurement range assigned to the detection changeover switch 11), the processing unit 5 measures the measurement range of 200 mV, which is the maximum measurement range among the measurement ranges assigned to the detection changeover switch 11 c. Is determined as a new measurement range, and when the changeover switch 11e is pressed instead of the changeover switch 11c (when the current measurement range is smaller than the measurement range assigned to the detection changeover switch 11), the processing unit 5 is the smallest measurement range among the measurement ranges assigned to the detection selector switch 11e. Determining the measurement range of a 10V as a new measuring range.

  On the other hand, when the processing unit 5 determines that the current measurement range is included in the measurement range assigned to the detection changeover switch 11, the measurement range assigned to the detection changeover switch 11 is defined in advance. A new measurement range is determined in order. In addition, when the processing unit 5 determines a new measurement range, the processing unit 5 performs range switching processing and outputs a range signal Sra indicating the new measurement range to the range switching unit 3. In contrast, the current measurement range is switched to the new measurement range, and only one drive signal Sd corresponding to the new measurement range is output to the range display unit 21, and the new display range is output to the range display unit 21. Only one LED 22 indicating the correct measurement range is turned on.

  In this case, as the above-mentioned predetermined order when determining one of the measurement ranges assigned to the detection changeover switch 11 as a new measurement range, the processing unit 5 has the following first order: Either of the second orders can be employed. In this first order, the measurement range assigned to the detection changeover switch 11 is determined as a new measurement range in one of the ascending order and the descending order, and the assigned measurement range in the ascending order is determined. When the largest measurement range is the current measurement range, the smallest measurement range of the assigned measurement ranges is determined as a new measurement range, while in the descending order, the assigned measurement range. When the smallest measurement range is the current measurement range, the process of determining the largest measurement range among the assigned measurement ranges as a new measurement range is repeated.

  For example, in this predetermined order, the processing unit 5 determines a new measurement range in ascending order, and the detection changeover switch 11 is changed to the changeover switch 11b (that is, the detection changeover switch). 11b), and when the current measurement range is a measurement range of 20 mV, for example, every time the detection changeover switch 11b is pressed, a measurement range of 50 mV, a measurement range of 10 mV, a measurement range of 20 mV, a measurement range of 50 mV,. As described above, when the maximum measurement range is the current measurement range, the new measurement range is determined in ascending order while executing the determination method of setting the next new measurement range as the minimum measurement range. On the other hand, the processing unit 5 determines a new measurement range in descending order, and the detection changeover switch 11 is the changeover switch 11b (that is, the detection changeover switch 11b), and the current measurement range is, for example, 20 mV. In the measurement range, every time the detection changeover switch 11b is pressed, the minimum measurement range is the current measurement, such as the 10 mV measurement range, the 50 mV measurement range, the 20 mV measurement range, the 10 mV measurement range, and so on. When the range is selected, a new measurement range is determined in descending order while executing a determination method of setting the next new measurement range as the maximum measurement range.

  In the second order, the processing unit 5 determines the measurement range assigned to the detection changeover switch 11 as a new measurement range in an order that alternately repeats ascending order and descending order. Here, in this range switching process, after the new measurement range determined in ascending order becomes the maximum measurement range of the measurement ranges assigned to the detection selector switch 11, the new measurement range is set in descending order. After the new measurement range determined in descending order becomes the minimum measurement range among the measurement ranges assigned to the detection changeover switch 11, the process of determining the new measurement range in ascending order is repeated. In this second order, when a new measurement range is first determined, it may start from either ascending order or descending order, but in this example, it is assumed to start from ascending order.

  Explaining with an example, in this predetermined order, the processing unit 5 is configured so that the detection changeover switch 11 is the changeover switch 11b (that is, the detection changeover switch 11b), and the current measurement range is, for example, 20 mV. Sometimes, each time the detection changeover switch 11c is pressed, a new measurement range is determined such as a measurement range of 50 mV, a measurement range of 20 mV, a measurement range of 10 mV, a measurement range of 20 mV, a measurement range of 50 mV, and so on. .

  With the above configuration, the measurement apparatus 1 adopts the first rule as the predetermined rule and uses the first order as the predetermined order. When the person switches the current measurement range (for example, the measurement range of 2 mV) to the desired measurement range of 20 V, the numerical value of the measurement range displayed in the vicinity of each changeover switch 11 on the front panel FP is shown. Using the number as a guide, the selector switch 11e to which the measurement range of 20V is assigned is pressed (thereby becoming the detection selector switch 11e), and then the selector switch 11e is pressed only once. When the changeover switch 11e is pressed twice (operation), the processing unit 5 first determines the measurement range of 10V as a new measurement range, and then determines the measurement range of 20V as a new measurement range. At this time, since the drive signal Sd is sequentially output from the processing unit 5 to the LEDs 22m and 22n of the range display unit 21, the numerical value displayed in the vicinity of the lit LED 22 and the changeover switch 11 are displayed. It is possible to switch the range to a desired measurement range while recognizing a new measurement range (new current measurement range) from the unit. In addition, when switching the 50V measurement range as a desired measurement range, the range can be switched to the 50V measurement range by pressing the detection changeover switch 11e only once. .

  When the current measurement range (for example, 1V measurement range) is switched to a desired measurement range of 5 mV, the changeover switch 11a to which the measurement range of 5 mV is assigned is pressed three times. At this time, the processing unit 5 first determines the measurement range of 1 mV as a new measurement range, then determines the measurement range of 2 mV as a new measurement range, and subsequently determines the measurement range of 5 mV as a new measurement range. Determine as a range. Thus, the user can switch the range to the desired measurement range of 5 mV by pressing (operating) the changeover switch 11 three times.

  When the range is switched from the current measurement range (for example, the measurement range of 2V) to the measurement range of 1V assigned to the same changeover switch 11 as the current measurement range, both measurement ranges are assigned. The changeover switch 11d is pressed twice. At this time, the processing unit 5 first determines the measurement range of 5V as a new measurement range, and then determines the measurement range of 1V as a new measurement range. Thereby, the user can switch the range to the desired measurement range of 1 V by pressing (operating) the change-over switch 11 twice.

  Although not described in detail, the above first rule is adopted as the above predetermined rule, and the above second order is adopted as the above predetermined order. Measuring device 1 adopting the second rule as the predetermined rule, measuring device 1 adopting the first order as the predetermined order, and In any of the measuring apparatuses 1 that adopt the second rule as the predetermined rule and adopt the second order as the predetermined order, the above-mentioned predetermined rule is used. In the same manner as the measurement apparatus 1 adopting the first order as the predetermined order and adopting the first order as the predetermined order, Since there are m (3 in the above example) measurement ranges each assigned to a specific changeover switch 11 (in the above example, the changeover switches 11a, 11b, 11d, and 11e) of the switch 11, When the range is switched to the desired measurement range assigned to the change-over switch 11 to which the current measurement range is not assigned, the change-over switch 11 is set to m (3 in the above example) at most. The range can be switched by simply pressing it, and the current measurement range is switched to another desired measurement range assigned to the changeover switch 11 to which the current measurement range is assigned. The range can be switched simply by pressing the switch 11 at most m-1 (2 in the above example).

  Moreover, in the measuring apparatus 1, the processing unit 5 is based on the first rule and the second rule described above, and is selected from the plurality of measurement ranges assigned to the switch 11 (detection switch 11) that is pressed. When the smallest measurement range is determined as the first new measurement range, when the detection switch 11 is further pressed thereafter, the next measurement range is determined based on the first order or the second order. When determining a new measurement range, it is determined in ascending order until the new measurement range is set to the maximum measurement range. On the other hand, the change-over switch 11 that has been pressed based on the first rule or the second rule described above is determined. When the maximum measurement range among the plurality of measurement ranges assigned to the (detection changeover switch 11) is determined as the first new measurement range, the detection switch When the switch 11 is further pressed, when the next new measurement range is determined based on the first order or the second order described above, the new measurement range is set to the minimum measurement range. It is also possible to adopt a configuration that determines in descending order.

  In this configuration, for example, when the detection switch 11 to which the desired measurement range is assigned is pressed in order to switch the range to a desired measurement range lower than the current measurement range, the processing unit 5 first Based on the second rule, a maximum measurement range among a plurality (three or more) of measurement ranges assigned to the detection changeover switch 11 is determined as a new measurement range, and then the detection changeover switch Each time 11 is pressed, a lower measurement range is sequentially determined as a new measurement range (a new measurement range is determined in descending order). Conversely, when the detection changeover switch 11 to which the desired measurement range is assigned is pressed in order to switch the range to a desired measurement range higher than the current measurement range, the processing unit 5 first selects the second measurement range. Is determined as a new measurement range among a plurality of (three or more) measurement ranges assigned to the detection change-over switch 11, and then the detection change-over switch 11 is pressed. Each time it is done, a higher measurement range is determined as a new measurement range (a new measurement range is determined in ascending order).

  With this configuration, when switching the range to a desired measurement range lower than the current measurement range, it is possible to switch the range to the desired measurement range while monotonically decreasing the measurement range. When switching the range to a desired measurement range higher than the range, it is possible to switch the range to the desired measurement range while monotonically increasing the measurement range, so one direction (decreasing direction or increasing direction) It becomes possible to reliably switch the range according to the desired measurement range only by switching the range.

  As described above, the measuring apparatus 1 includes a plurality of changeover switches 11 and at least a plurality of specific changeover switches 11 (in the above example, changeover switches 11a, 11b, 11d, and 11e). ) Is assigned two or more m (three in the above example) measurement ranges, and the other changeover switches 11 (in the above example, the changeover switch 11c) other than this specific changeover switch 11 remain. Measurement ranges (two measurement ranges in the above example) are assigned, and the processing unit 5 depresses (operates) the changeover switch 11 other than the changeover switch 11 to which the current measurement range is assigned in the range changeover process. When one of the measurement ranges assigned to the pressed changeover switch 11 is selected, a new measurement range is determined. When the range switch is switched to the new measurement range and the changeover switch 11 to which the current measurement range is assigned is pressed, the measurement range assigned to the pressed changeover switch 11 is set in a predetermined order (above The first measurement order or the second order) is determined as a new measurement range, and the range is switched to the new measurement range.

  Therefore, according to this measuring apparatus 1, compared with a measuring apparatus having a configuration in which a changeover switch is individually provided corresponding to each of a plurality of measurement ranges, the number of changeover switches 11 is significantly reduced. Compared to a measurement apparatus configured to switch the measurement range by operating the UP key or the DOWN key, the range can be switched to the desired measurement range with a significantly smaller number of operations (presses) on the changeover switch 11.

  Further, according to this measuring apparatus 1, the same m number of measurement ranges are assigned to a plurality of specific selector switches 11 (in the above example, the selector switches 11a, 11b, 11d, and 11e), and the other selector switches 11 are used. Since the remaining measurement ranges (measurement ranges of less than m) are assigned to, the range can be switched to the desired measurement range by simply pressing the switch 11 at most.

  Further, according to the measurement apparatus 1, the processing unit 5 newly sets a measurement range closest to the current measurement range among a plurality of measurement ranges assigned to the operated changeover switch 11 (detection changeover switch 11). The measurement range is assigned to the detection changeover switch 11 by setting the maximum measurement range or the minimum measurement range among the plurality of measurement ranges assigned to the detection changeover switch 11 as a new measurement range. The measurement range at the end of the plurality of measurement ranges can always be determined as a new measurement range first. For this reason, according to this measuring apparatus 1, the user is always allowed to start range switching starting from the end measurement range (the maximum measurement range or the minimum measurement range) (that is, the subsequent measurement range). Since range switching can be started in a state where the moving direction can be easily grasped intuitively, erroneous operations such as overshooting the desired measurement range can be greatly reduced.

  Moreover, according to this measuring device 1, when the changeover switch 11 to which the current measurement range is assigned is pressed (operated), the first order (as described above) As the new measurement range is determined in an order in which the switching operation is easy to predict for the user, such as the second order (the order in which the ascending order and the descending order are alternately repeated), and the second order (the order in which the ascending order and the descending order are alternately repeated) It is possible to greatly reduce erroneous operations such as excessive travel.

  Moreover, according to this measuring apparatus 1, since the number which shows the measurement range allocated to each change-over switch 11 is described in each change-over switch 11 itself or in the vicinity of each change-over switch 11, this measurement range is shown. The changeover switch 11 to which a desired measurement range is assigned can be reliably operated using the number as a guide.

  In the measurement apparatus 1 described above, the range display unit 21 is configured with the same number of LEDs 22a to 22o as the number of measurement ranges individually arranged in the vicinity of the numbers indicating the numerical values of the respective measurement ranges. It is not limited to. For example, when the output unit 7 is configured by a display device as in the measurement apparatus 1A shown in FIG. 3, a partial display area (area indicated by a broken line) of the display screen is used as the range display unit 21A. It is also possible to adopt a configuration in which a number indicating the numerical value of the current measurement range is displayed on the range display unit 21A. Although not shown, it is also possible to adopt a configuration in which the range display unit 21A is configured by a display device (LCD or the like) different from the output unit 7 and arranged on the front panel FP. In addition, about 1 A of measuring apparatuses, since it is the same as that of the measuring apparatus 1 except the range display part 21A, the same code | symbol was attached | subjected about the same structure and the overlapping description was abbreviate | omitted.

  Further, in the measurement apparatus 1 described above, a configuration in which the same number (m) of measurement ranges are assigned to a plurality of specific changeover switches 11 is employed, but a desired range can be obtained simply by pressing the changeover switch 11 at most. In the case where the range can be switched to the measurement range, for some of the plurality of specific change-over switches 11, any number of 2 or more and less than m (for example, 2 or 2 when m is 4) (3) measurement ranges can be assigned.

1,1A measuring device
5 processing unit 11a to 11e changeover switch 21, 21A range display unit 22a to 22o LED

Claims (7)

The current measurement range of the plurality of measurement ranges is switched to a new measurement range based on the operation content for the changeover switch, the range display unit, and the changeover switch, and the new measurement range is compared with the range display unit. And a processing unit that executes a range switching process for displaying the current measurement range as a new measurement range,
A plurality of the changeover switches are provided, and at least a plurality of the changeover switches among the plurality of changeover switches are assigned two or more measurement ranges,
When the switch other than the switch to which the current measurement range is assigned is operated in the range switching process when the specific switch is operated, the processing unit changes the operated switch to the operated switch. When one of the assigned measurement ranges is switched to the new measurement range as the new measurement range, and the changeover switch to which the current measurement range is assigned is operated, A measurement apparatus that switches a measurement range assigned to the selected changeover switch to the new measurement range as the new measurement range in a predetermined order.   The measurement apparatus according to claim 1, wherein the same number of measurement ranges are assigned to the specific changeover switch.   The processing unit, as one of the plurality of measurement ranges assigned to the operated changeover switch, sets the measurement range closest to the current measurement range among the plurality of measurement ranges as the new measurement range. The measuring device according to claim 1, wherein the measuring device is a measuring range.   The processing unit is one of the maximum measurement range and the minimum measurement range of the plurality of measurement ranges as one of the plurality of measurement ranges assigned to the operated changeover switch. 3. The measuring apparatus according to claim 1, wherein one of the measuring ranges is the new measuring range. Three or more measurement ranges are assigned to the specific changeover switch,
In the range switching process at the time of an operation on the specific changeover switch, the processing unit sets the measurement range assigned to the operated changeover switch as an ascending order or a descending order as the predetermined order. On the other hand, when the maximum measurement range among the assigned measurement ranges is the current measurement range in the ascending order while the new measurement range is set, the smallest measurement among the assigned measurement ranges. The range is the new measurement range, and in the descending order, when the smallest measurement range of the assigned measurement ranges is the current measurement range, the largest measurement range of the assigned measurement ranges is set. The measurement apparatus according to claim 1, wherein the new measurement range is used. Three or more measurement ranges are assigned to the specific changeover switch,
The processing unit alternately repeats the measurement range assigned to the operated changeover switch in the ascending order and the descending order as the predetermined order in the range changeover process when operating the specific changeover switch. The measurement apparatus according to claim 1, wherein the new measurement range is set in order.   The measurement apparatus according to claim 1, wherein a number indicating the measurement range assigned to the changeover switch is written on the changeover switch itself or in the vicinity of the changeover switch.

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