JP2007187611A - Measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring device for accurately measuring parameters of measuring parts. <P>SOLUTION: The measuring device includes: a measuring part for measuring a temperature T on the measuring parts 101; and a projection part for projecting and displaying at least one of measured values of the temperature T measured by the measuring parts 101 and information concerning measurement in the neighborhood of the measuring parts. In this case, a composition provided with a laser light emission part emitting laser light Ll recognizing the measuring parts 101 is employed. By making such composition, even when the measuring parts 101 are separated from a measuring person, a visual line avoids a state in which it is separated from the measuring parts 101 when confirming the measured values. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a measuring apparatus configured to be able to measure a predetermined parameter at a measurement location.

As this type of measuring apparatus, the applicant has disclosed a radiation thermometer capable of measuring the temperature of the temperature-measured body in a non-contact manner in Japanese Patent Application Laid-Open No. 2002-286550. In this radiation thermometer, the infrared sensor detects the infrared radiation energy radiated from the measurement location of the temperature-measuring object, and the CPU measures the location based on the infrared radiation energy detected by the infrared sensor and a predetermined emissivity. Is calculated and the temperature is displayed on the display. Moreover, in this radiation thermometer, the measurement location of the temperature in a to-be-measured body is visually recognized by irradiating a laser marker. In this case, with this radiation thermometer, the temperature at the desired measurement location is measured by aligning the laser marker with the measurement location.
JP 2002-286550 A (page 2-4, FIG. 1)

  However, the above radiation thermometer has the following problems to be improved. That is, in this radiation thermometer, the measured temperature and various information related to the measurement are displayed on a display provided in the radiation thermometer. For this reason, for example, when the measurement location is separated from the radiation thermometer (that is, the measurer holding the radiation thermometer), in order to confirm the measured temperature and various information related to the measurement, It must be deflected, and it becomes difficult to maintain a state in which the laser marker and the measurement location are aligned. Therefore, with this radiation thermometer, it is difficult to accurately align the actual measurement location when the temperature is confirmed with the desired measurement location, making it difficult to accurately measure the temperature at the desired measurement location. It is preferable to improve this.

  The present invention has been made in view of such a problem to be improved, and a main object of the present invention is to provide a measuring apparatus capable of accurately measuring a parameter at a measurement location.

  In order to achieve the above object, the measuring apparatus according to claim 1 is configured to measure at least one of a measurement unit that measures a predetermined parameter at a measurement location, a measurement value of the parameter measured by the measurement unit, and information related to measurement. And a projection unit for projecting and displaying at a location or in the vicinity of the measurement location. In this case, the information related to the measurement includes, for example, various information such as a general operation method of the measurement apparatus, a parameter measurement method using the measurement apparatus, a state of the measurement apparatus, and a setting value setting procedure for the measurement apparatus. Is included. In addition, “near” in the present invention refers to a range that can be seen without removing the line of sight from the measurement location.

  According to a second aspect of the present invention, there is provided the measuring apparatus according to the first aspect, further comprising a marking light emitting unit that emits marking light for recognizing the measurement location.

  According to a third aspect of the present invention, in the measurement apparatus according to the first or second aspect, the measurement unit includes a temperature detection unit that detects the temperature as the parameter in a non-contact manner.

  According to the measuring apparatus of claim 1, by providing the projection unit that projects and displays the measured value of the predetermined parameter on the measurement location or in the vicinity of the measurement location, the state in which the parameter at the desired measurement location is being measured. The measured value of the parameter can be confirmed while maintaining it. For this reason, for example, unlike the conventional apparatus in which the measurement value is displayed only on the display, it is possible to avoid a situation in which the line of sight deviates from the measurement location when confirming the measurement value and various information related to the measurement. Therefore, according to this measuring apparatus, the actual measurement location at the time when the parameter is confirmed can be reliably matched with the desired measurement location, and as a result, the parameter at the desired measurement location can be accurately measured.

  In addition, according to the measuring apparatus of the second aspect, the measuring spot is provided with the marking light emitting unit for emitting the marking light for recognizing the measuring spot, so that the measuring spot is the measuring device (that is, the measurer holding the measuring device). Even if they are separated from each other, it is possible to reliably and easily align the actual measurement location with the desired measurement location by aligning the point irradiated with the indicator light with the desired measurement location. . Therefore, the parameter at the desired measurement location can be reliably measured by the measurement unit. As a result, the parameter at the measurement location can be accurately measured even when the measurement location is separated from the measurer. Can do.

  In addition, according to the measurement apparatus of the third aspect, the temperature detection unit that detects the temperature as a parameter in a non-contact manner is provided, so that the temperature at a desired measurement location can be accurately measured in a non-contact manner.

  Hereinafter, the best mode of a measuring apparatus according to the present invention will be described with reference to the accompanying drawings.

  Initially, the structure of the radiation thermometer 1 as an example of the measuring apparatus which concerns on this invention is demonstrated with reference to drawings.

  As shown in FIG. 1, the radiation thermometer 1 is a measurement device that measures the temperature (an example of a parameter in the present invention) at a measurement location 101 on the surface of a measurement object 100 (for example, a boiler or a pipe) in a non-contact manner. As shown in FIG. 2, the infrared sensor 2, the laser light emission unit 3, the control unit 4, the projection unit 5, the display 6, and the operation unit 7 are provided. The infrared sensor 2 corresponds to a temperature detection unit in the present invention, is configured to include, for example, a thermopile sensor, and is disposed on the front surface of the radiation thermometer 1 (upper right side in FIG. 1). In this case, the infrared sensor 2 detects the infrared Li emitted from the measurement location 101 of the measurement object 100 facing the detection surface, generates a detection signal Sd having an intensity corresponding to the amount of energy, and sends the detection signal Sd to the control unit 4. Output. That is, the infrared sensor 2 detects the temperature T as a parameter in the present invention in a non-contact manner.

  The laser light emitting unit 3 corresponds to the marking light emitting unit in the present invention, and includes a laser light source 31, a half mirror 32, and a mirror 33, as shown in FIG. Laser light (an example of the marking light in the present invention) L1 is emitted. The laser light source 31 emits the laser light Ll in the direction in which the detection surface of the infrared sensor 2 is directed according to the control of the control unit 4. The half mirror 32 is disposed so as to form a predetermined angle (for example, 45 °) with respect to the traveling direction (emission direction) of the laser light Ll, and transmits a part of the laser light Ll and a part of the mirror. Reflect toward 33. The mirror 33 is disposed at a predetermined angle (for example, 45 °) with respect to the traveling direction of the laser light L1 reflected by the half mirror 32, and the traveling direction of the laser light Ll transmitted through the half mirror 32 ( The laser beam Ll from the half mirror 32 is reflected in the same direction as the emission direction. In this case, the half mirror 32 and the mirror 33 are opposed to each other with the infrared sensor 2 interposed therebetween, and are disposed at positions separated from the infrared sensor 2 by the same distance.

  The control unit 4 controls the laser light emitting unit 3, the projecting unit 5, and the display 6. The control unit 4 constitutes a measurement unit according to the present invention together with the infrared sensor 2, and sets the temperature T as a parameter at the measurement location 101 based on the energy amount of the infrared Li indicated by the detection signal Sd output from the infrared sensor 2. calculate. In this case, the control unit 4 generates temperature data Dt indicating the temperature T and outputs it to the projection unit 5 and the display 6.

  The projection unit 5 includes a light source 51 and a liquid crystal panel 52, and is configured to project and display an image indicating a temperature T (measured value in the present invention) based on the temperature data Dt in the vicinity of the measurement location 101 (for example, right adjacent). Has been. In this case, “near” in the present invention refers to a range in which an image can be visually recognized without removing the line of sight from the measurement location 101. Therefore, as long as it is within this range, an image can be projected and displayed at an arbitrary position. The light source 51 emits light toward the liquid crystal panel 52 by emitting light according to the control of the control unit 4. The liquid crystal panel 52 is disposed on the front side of the radiation thermometer 1 and modulates the light from the light source 51 into projection light Lp for image display, and the projection light Lp is radiated through a projection lens (not shown). Project toward the front side of the total 1. The display 6 is disposed on the upper surface of the radiation thermometer 1 and displays an image indicating the temperature T based on the temperature data Dt output from the control unit 4. The operation unit 7 includes an operation switch 71 disposed on the upper surface of the radiation thermometer 1, and controls an instruction signal instructing activation or deactivation of the radiation thermometer 1 when the operation switch 71 is operated. Output to part 4.

  Next, the overall operation of the radiation thermometer 1 when measuring the temperature of the measurement object 100 using the radiation thermometer 1 will be described with reference to the drawings.

  First, the operation switch 71 is operated with the front side of the radiation thermometer 1 facing the measurement object 100. At this time, the operation unit 7 outputs an instruction signal for instructing the operation of the radiation thermometer 1 to the control unit 4. In response to this, the control unit 4 controls the laser light source 31 to emit the laser light Ll. Next, a part of the laser light L1 emitted from the laser light source 31 passes through the half mirror 32 and is irradiated onto the measurement object 100, and a part of the laser light Ll is reflected by the half mirror 32 toward the mirror 33. Is done. Further, the laser beam Ll reflected by the half mirror 32 is reflected by the mirror 33 and is irradiated onto the measurement object 100. At this time, the portion irradiated with the laser beam Ll in the measurement object 100 is visually recognized as a red dot (hereinafter, this red dot is also referred to as “marker M”).

  Subsequently, by adjusting the position where the radiation thermometer 1 is held and the angle of the radiation thermometer 1, as shown in FIGS. Align the marker M. In this case, even if the measurement location 101 is separated from the radiation thermometer 1 (that is, the measurer holding the radiation thermometer 1), the marker M can be reliably recognized. For this reason, as a result of being able to perform alignment of the marker M and the measurement location 101 reliably and easily, the detection surface of the infrared sensor 2 can be reliably made to oppose the desired measurement location 101. FIG.

  Next, the infrared sensor 2 detects the infrared ray Li emitted from the measurement location 101 and outputs a detection signal Sd corresponding to the energy amount of the infrared ray Li to the control unit 4. In this case, the infrared sensor Li is reliably detected by the infrared sensor 2 because the detection surface of the infrared sensor 2 is accurately opposed to the measurement spot 101. Subsequently, the control unit 4 calculates the temperature T at the measurement location 101 based on the energy amount of the infrared rays Li indicated by the detection signal Sd. Next, the control unit 4 outputs temperature data Dt indicating the temperature T (for example, 23.5 ° C.) to the projection unit 5 and the display 6. Subsequently, the display 6 displays an image indicating the temperature T based on the temperature data Dt.

  On the other hand, in the projection unit 5, the light source 51 emits light according to the control of the control unit 4 to emit light toward the liquid crystal panel 52. In addition, the liquid crystal panel 52 modulates the light from the light source 51 into the projection light Lp that can display an image indicating the temperature T based on the temperature data Dt, and the radiation temperature of the projection light Lp through a projection lens (not shown). Project toward the front side of the total 1. At this time, as shown in FIGS. 1 and 3, the projection light Lp is projected to the vicinity of the measurement location 101 (in this case, the right side) in the measurement object 100, thereby projecting and displaying an image indicating the temperature T. . In this case, since the image indicating the temperature T is displayed in the vicinity of the measurement location 101, the image indicating the temperature T can be viewed while maintaining the state where the marker M and the measurement location 101 are aligned. For this reason, for example, unlike a conventional radiation thermometer in which the measured value of the temperature T is displayed only on the display 6, it is possible to avoid a situation in which the line of sight deviates from the measurement location 101 when confirming the measured value. .

  As described above, according to the radiation thermometer 1, the temperature T at the desired measurement location 101 is measured by including the projection unit 5 that projects and displays an image indicating the temperature T in the vicinity of the measurement location 101. An image showing the temperature T can be visually recognized (that is, the measured value is confirmed) while maintaining the state. For this reason, for example, unlike the conventional radiation thermometer in which the measured value of the temperature T is displayed only on the display 6, it is possible to avoid a situation in which the line of sight deviates from the measurement location when the measured value is confirmed. Therefore, according to the radiation thermometer 1, the actual measurement location 101 at the time when the temperature T is confirmed can be reliably aligned with the desired measurement location 101. As a result, the temperature T at the desired measurement location 101 can be obtained. It can be measured accurately.

  In addition, according to the radiation thermometer 1, the measurement location 101 holds the radiation thermometer 1 (that is, holds the radiation thermometer 1) by providing the laser light emitting unit 3 that emits the laser light Ll for recognizing the measurement location 101. The position of the marker M and the measurement location 101 can be adjusted by aligning both the markers M so that the desired measurement location 101 is positioned at the center of the markers M even if they are separated from each other. Can be reliably and easily performed. Therefore, as a result of reliably allowing the detection surface of the infrared sensor 2 to face the desired measurement location 101, the temperature T of the measurement location 101 can be accurately measured even when the measurement location 101 is away from the measurer. Can be measured. Moreover, according to this radiation thermometer 1, by providing the infrared sensor 2 that detects the temperature T as a parameter in a non-contact manner, the temperature T at a desired measurement location 101 can be accurately measured in a non-contact manner. .

  In addition, this invention is not limited to said structure. For example, the configuration example in which an image indicating the temperature T is projected and displayed in the vicinity of the measurement location 101 has been described. However, this image can be projected and displayed on the measurement location 101, and even in this configuration, the line of sight deviates from the measurement location 101. The situation can be avoided. Moreover, according to this structure, since the measurement location 101 can be recognized by projecting and displaying an image without irradiating the laser beam Ll, the radiation thermometer 1 can be omitted as much as the laser beam emitting unit 3 can be omitted. It can be configured at low cost. Further, the image to be projected and displayed is not limited to the image showing the temperature T described above. For example, the general operation method of the radiation thermometer 1, the measurement method of the temperature T using the radiation thermometer 1, the radiation thermometer 1 And an image showing various information such as the setting procedure of various setting values for the radiation thermometer 1. As the projection light Lp, various visible light and invisible light such as infrared rays and ultraviolet rays can be used. Moreover, the structure which draws the image which shows temperature T and various information using a laser beam (projection display) is also employable.

  In addition, the configuration in which the laser beam emitting unit 3 projects the two laser beams Ll toward the outer periphery of the measurement location 101 has been described, but the laser beam emitting unit 3 measures an arbitrary number of laser beams Ll of three or more. A configuration of projecting toward the outer periphery of the location 101 can also be adopted. Moreover, the measurement location 101 can also be pointed out by emitting one laser beam Ll at the center of the measurement location 101. According to this configuration, the measurement location 101 can be reliably recognized with a simple configuration. Moreover, it is not limited to laser beam Ll, Various visible light and invisible lights, such as infrared rays and an ultraviolet-ray, can be used as indicator light.

  Moreover, although the structure which applied this invention to the radiation thermometer 1 was demonstrated, it is not limited to this. For example, the present invention can be applied to various measuring apparatuses such as a pen-type DMM (Digital Multi Meter) in which test leads are integrally formed on the apparatus main body. In this case, by disposing the projection unit in the apparatus main body, when measuring a parameter such as a voltage value or a current value by bringing a test lead into contact with a fine part such as a circuit pattern on a circuit board, for example, it is in the vicinity of the measurement location. The measured value can be projected and displayed. For this reason, it is possible to reliably avoid a situation in which the test lead deviates from the desired measurement location due to the line of sight deviating from the measurement location in order to confirm the measurement value. It can be measured accurately.

1 is a perspective view of a radiation thermometer 1 and a measurement object 100. FIG. 1 is a configuration diagram showing a configuration of a radiation thermometer 1. FIG. FIG. 3 is a front view of the measurement object 100 in a state where a temperature T is displayed in the vicinity of a measurement location 101.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radiation thermometer 2 Infrared sensor 3 Laser light emission part 4 Control part 5 Projection part 6 Display 100 Measurement object 101 Measurement location Ll Laser light Lp Projection light T Temperature

Claims (3)

  A measurement unit that measures a predetermined parameter at a measurement location; and a projection unit that projects and displays at least one of the measurement value of the parameter measured by the measurement unit and information related to the measurement on the measurement location or in the vicinity of the measurement location. Measuring device equipped.   The measuring apparatus according to claim 1, further comprising a marking light emitting unit that emits marking light for recognizing the measurement location.   The measurement apparatus according to claim 1, wherein the measurement unit includes a temperature detection unit that detects the temperature as the parameter in a non-contact manner.

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