JP6541112B2 - Soil hardness measuring device - Google Patents

Description

  The present invention relates to a soil hardness measuring device for measuring the hardness of soil.

  The soil hardness measuring device measures the hardness of the soil by performing an operation of penetrating the cone into the soil. As a soil hardness measuring device, a cone which penetrates into the soil, a spring for measuring hardness which is pressed and contracted by resistance received by the cone which penetrates into the soil, a spring case for inserting a spring, and a spring retainer for holding the spring inserted in the spring case A potentiometer for converting the amount of change in contraction of the spring into an electric signal, a slide arm for transmitting the contraction of the spring to the potentiometer, and a connector for outputting the electric signal converted by the potentiometer and converted by the potentiometer to the display recorder A digital soil hardness tester provided has been proposed (see, for example, Patent Document 1). Based on the electrical signal output from the digital soil hardness meter, the display recorder calculates the hardness of the soil and displays the calculation result on the liquid crystal display.

JP, 2010-014683, A

  The digital soil hardness tester and the display recorder are separate devices. For this reason, in order to know the hardness of the soil, it is necessary to connect the digital soil hardness tester and the display recorder with a connecting cable. It is troublesome to connect both devices with a connecting cable each time to know the hardness of the soil.

  In view of such circumstances, the present invention is intended to provide a soil hardness measuring device capable of performing measurement of soil hardness to result display.

The present invention has been made to solve the above-mentioned problems, and the soil hardness measuring device of the present invention holds a hardness measuring unit that measures the hardness of the soil, and a battery that supplies power to the hardness measuring unit. And a display unit on which the measurement result of at least the hardness measurement unit is displayed, the hardness measurement unit being penetrated into the soil along the axial direction of its own central axis A penetration portion, a displacement portion for giving displacement to the penetration portion according to a load received from the soil along an axial direction of the central axis, and a displacement amount measuring mechanism for measuring the displacement amount from the reference position of the penetration portion; A control unit that controls measurement of the hardness of the soil; the penetration portion, the displacement portion, and the battery holding portion are sequentially arranged along the axial direction of the central axis, and the control portion is configured to The current position of the unit to the above reference position It characterized by having a reference position correction unit.

  Further, in the soil hardness measuring device of the present invention, the battery holding portion has a battery housing space in which the battery is housed, and in the battery holding portion, the longitudinal direction of the battery housing space is parallel to the central axis. It is characterized in that it is arranged as follows.

  Further, in the soil hardness measuring device according to the present invention, the battery holding portion has a battery contact surface with which at least a part of the peripheral surface of the battery is in contact when the battery is housed in the battery housing space. The battery contact surface is extended corresponding to the longitudinal direction of the battery, and the battery holding portion is disposed such that the longitudinal direction of the battery contact surface is parallel to the central axis. It is characterized by

  Further, in the soil hardness measuring device of the present invention, the hardness measuring unit has a displacement amount measuring mechanism for measuring the displacement amount of the penetration portion from the reference position, and the displacement as viewed from the direction perpendicular to the central axis A portion in which the amount measurement mechanism and the battery holding portion overlap each other is disposed so as not to overlap with the battery holding portion when viewed from the axial direction of the central axis.

  Further, in the soil hardness measuring device according to the present invention, the displacement amount measuring mechanism is arranged to be shifted in a direction perpendicular to the central axis with respect to the battery holding portion.

  Further, in the soil hardness measuring device of the present invention, the battery holding portion, the displacement amount measuring mechanism, and the display portion are arranged in order along a direction perpendicular to the central axis.

  Further, in the soil hardness measurement device of the present invention, the battery holding unit has a removable battery cover, and the battery cover is provided on the opposite side to the display unit.

  Further, in the soil hardness measuring device according to the present invention, the displacement portion is provided with a biasing portion which slides the penetration portion while applying a reaction force according to a load received from the soil to the penetration portion; A proximal end movement restricting portion which restricts the movement of the biasing portion to the proximal end side of the central axis in the axial direction with respect to itself, and the proximal end movement restricting portion And a non-contacting outer peripheral surface not in contact with the inner peripheral surface of the case, and a non-contacting outer peripheral surface not in contact with the inner peripheral surface of the case. A passage extending in parallel with the central axis is formed between the outer peripheral surface and the inner peripheral surface of the casing, and the displacement amount measuring mechanism is arranged to pass through the passage.

  Further, in the soil hardness measuring device of the present invention, the battery holding portion is fixed by being connected to at least the base end side movement restricting portion.

  Further, in the soil hardness measuring device according to the present invention, the hardness measuring unit has a displacement amount measuring mechanism for measuring the displacement amount of the penetration portion from the reference position, and the displacement portion and the displacement amount measuring mechanism are It is characterized in that it is arranged along a direction perpendicular to the central axis.

  Further, in the soil hardness measuring device of the present invention, the displacement portion, the displacement amount measuring mechanism, and the display portion are arranged in order along a direction perpendicular to the central axis.

  Further, in the soil hardness measuring device according to the present invention, at least a part of the displacement amount measuring mechanism is disposed so as to overlap with the displacement portion when viewed from the axial direction of the central axis.

  Further, in the soil hardness measuring device according to the present invention, the displacement amount measuring mechanism is fixed to the moving body configured to be movable in parallel with the central axis in conjunction with the displacement of the penetration portion. And a fixed body that has a sliding surface on which the sliding body slides, and performs an output according to the position of the sliding body on the sliding surface, and the hardness measurement unit A control unit that controls measurement of the hardness of the soil, and the control unit includes a displacement amount calculation unit that calculates the displacement amount of the penetration portion based on the position of the sliding body on the sliding surface The sliding surface is disposed so as to extend in parallel with the central axis on the central axis side with respect to the display unit.

  Further, in the soil hardness measuring device of the present invention, the hardness measuring unit has an electronic circuit board on which a control unit for controlling the measurement of the hardness of the soil is mounted on the surface side, and the fixed body is the electronic circuit board It is characterized in that it is fixed to the back of the

Further, in the soil hardness measuring device according to the present invention, the penetration portion and the display portion are sequentially disposed along the axial direction of the central axis, and a penetration portion side housing provided closer to the penetration portion than the display portion. A body is provided, and a grip part is formed in the peripheral face of the penetration part side case.

Further, in the soil hardness measuring device according to the present invention, the penetration portion, the display portion, and the battery holding portion are arranged in order along the axial direction of the central axis, and are provided closer to the battery holding portion than the display portion. The battery holder side housing is provided, and the grip portion is formed on the outer peripheral surface of the battery holder side housing.

  In the soil hardness measuring device according to the present invention, at least a part of the outer edge on the display portion side protrudes in a direction perpendicular to the central axis more than the outer edge of the grip portion when viewed from the axial direction of the central axis It is characterized by

  Further, in the soil hardness measuring device according to the present invention, the hardness measuring unit has a displacement amount measuring mechanism for measuring a displacement amount from the reference position of the penetrating portion, and the displacement amount measuring mechanism is incident on the penetrating portion. An irradiation unit for irradiating light, and a light reception unit for receiving the reflected light from the penetration unit caused by the incident light, and the hardness measurement unit has a control unit for controlling the measurement of the hardness of the soil The control unit may include a displacement amount calculation unit that calculates a displacement amount of the penetration portion based on the reflected light received by the light receiving unit.

  Further, in the soil hardness measuring device according to the present invention, the maximum displacement amount of the penetration portion set in advance is defined as a reference maximum displacement amount, and the control portion determines between the current position of the penetration portion and the reference position. And a scale calibration unit that calibrates the scale of the distance, considering the distance of the reference as the reference maximum displacement amount.

  Further, in the soil hardness measuring device of the present invention, the control unit has an error detection unit which detects an error when the distance is smaller than a predetermined threshold.

  According to the soil hardness measurement device of the present invention, it is possible to exhibit an excellent effect that measurement of soil hardness to result display can be performed.

It is a sectional view of a soil hardness calculation device in a 1st embodiment of the present invention. (A) is sectional drawing which shows a mode that the front-end | tip of the soil hardness calculation apparatus in the 1st Embodiment of this invention was contact | abutted to soil. (B) is sectional drawing which shows a mode that the front-end | tip of the soil hardness calculation apparatus in the 1st Embodiment of this invention was penetrated in soil. (A) is an outline view of a soil hardness calculation device in a first embodiment of the present invention. (B) is an external view of the modification of the soil hardness calculation device in a 1st embodiment of the present invention. (A) is a cross-sectional view of the vicinity of the proximal end side movement limiting portion in the first embodiment of the present invention. (B) is AA sectional drawing of the proximal end movement restriction | limiting part vicinity in the 1st Embodiment of this invention. It is sectional drawing of the displacement amount measurement mechanism in the 1st Embodiment of this invention. It is a figure which shows the hardware constitutions of the control part in the 1st Embodiment of this invention. It is a functional block diagram of a control part in a 1st embodiment of the present invention. (A) is sectional drawing which shows a mode that the whole cone protruded from the front end side opening of a housing | casing in the soil hardness calculation apparatus in the 1st Embodiment of this invention. (B) is sectional drawing which shows a mode that a part of cone is immersed in the inside of a housing | casing in the soil hardness calculation apparatus in the 1st Embodiment of this invention. (C) is sectional drawing which shows a mode that the top part of a cone is located in a front end side opening surface in the soil hardness calculation apparatus in the 1st Embodiment of this invention. (A) is a sectional view near a battery attaching part in a 1st embodiment of the present invention. (B) is a BB sectional view near a battery attaching part in a 1st embodiment of the present invention. It is a figure which shows the arrangement | positioning aspect inside the housing | casing in the 1st Embodiment of this invention. (A) is a figure which shows the arrangement | positioning aspect of each component of the soil hardness calculation apparatus in the 1st Embodiment of this invention. (B) and (C) are figures which show the modification of the arrangement | positioning aspect of each component of the soil hardness calculation apparatus in the 1st Embodiment of this invention, respectively. It is an outline view of a soil hardness calculation device in a 1st embodiment of the present invention. It is a flowchart which shows operation | movement of the reference (standard) position calibration part in the 1st Embodiment of this invention, and a scale calibration part. It is a figure which shows the arrangement | positioning aspect inside the soil hardness calculation apparatus in the 2nd Embodiment of this invention. It is a figure which shows the arrangement | positioning aspect inside the soil hardness calculation apparatus in the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

First Embodiment
<Overall configuration>
A soil hardness measuring device 1 according to a first embodiment of the present invention will be described with reference to FIG. The soil hardness measurement device 1 includes a hardness measurement unit 10, a power supply unit 11, a display unit 12, and a housing 13.

<Hardness measurement unit>
The hardness measurement unit 10 measures the hardness of the soil. The hardness measurement unit 10 includes, for example, a penetration unit 14, a displacement unit 15, a displacement amount measurement mechanism 16, and a control unit 17.

<Penetration part>
First, the penetration part 14 is demonstrated with reference to FIG. The penetration part 14 is penetrated by the soil along the axial direction of 14 A of self axis | shafts. Hereinafter, the central axis 14A of the penetration portion 14 will be referred to as the penetration portion central axis 14A. Penetration part 14 is provided with cone 141 and base end 142, for example. The conical body 141 is a member having a conical shape. The penetration central axis 14 A coincides with the central axis 141 A in the height direction of the conical body 141. When penetration 14 penetrates into the soil, it penetrates from the top 141 B of cone 141 into the soil. Therefore, the direction in which the penetration part 14 is penetrated into the soil is the axial direction of the penetration center axis 14A.

  The proximal end portion 142 is a cylindrical body provided at the proximal end of the conical body 141. The proximal end 142 is extended along the axial direction of the central axis 141A of the conical body 141. The shape of the column constituting the proximal end portion 142 may be, but is not limited to, a cylindrical shape, and may be another shape.

  In the following, the side of the penetration portion 14 in the axial direction of the penetration center axis 14A is defined as the tip end side, and the side of the power supply portion 11 in the axial direction of the penetration center axis 14A is defined as the base end.

<Displacement part>
Next, the displacement portion 15 will be described with reference to FIGS. The displacement part 15 gives displacement to the penetration part 14 according to the load received from soil along the axial direction of the penetration part central axis 14A. As shown in FIGS. 2A and 2B, when the penetration portion 14 is penetrated into the soil 700, a load is received from the soil 700. As a result, the penetration portion 14 is displaced by the displacement portion 15 in accordance with the load, and is pushed into the housing 13. The displacement unit 15 as described above includes, for example, a biasing unit 18, a linear motion guide unit 19, and a base end side movement restriction unit 20.

<Activator>
Next, the biasing unit 18 will be described with reference to FIG. The biasing portion 18 biases the penetration portion 14 so as to move in the axial direction of the penetration portion central axis 14A. That is, the biasing portion 18 moves the penetration portion 14 in the axial direction of the penetration center axis 14A while applying a reaction force corresponding to the load received from the soil to the penetration portion 14. The biasing unit 18 is assumed to be configured by, for example, a coil spring, but is not limited thereto. The biasing portion 18 may be configured by, for example, another spring or hydraulic damper mechanism. In the following, the biasing portion 18 will be described as being configured by the coil spring 180.

  In the coil spring 180, a coil spring distal end portion 180 </ b> A which is one end on the distal end side of the coil spring 180 abuts on the proximal end surface 14 </ b> B of the penetration portion 14. In addition, the coil spring base end portion 180 </ b> B on the base end side of the coil spring 180 abuts on the base end side movement restricting portion 20. Further, the central axis of the coil spring 180 is arranged to coincide with the penetration central axis 14A. Thereby, the coil spring 180 can expand and contract along the axial direction of the penetration center axis 14A due to the force received by the penetration 14. As shown in FIGS. 2A to 2C, when the penetration portion 14 is penetrated into the soil 700, when the soil 700 is hard, the resistance to which the penetration portion 14 is received from the soil 700 increases, so the contraction of the coil spring 180 growing. On the other hand, when the soil 700 is soft, the resistance to which the penetration part 14 receives from the soil 700 is reduced, so the contraction of the coil spring 180 is reduced.

<Linear guide part>
Next, the linear motion guide unit 19 will be described with reference to FIG. The linear motion guide portion 19 guides the penetration portion 14 to move along the axial direction of the penetration portion central axis 14A. The linear motion guide unit 19 includes, for example, a first cylindrical portion 190 and a second cylindrical portion 195. The first cylindrical portion 190 includes a first cylindrical body 191, a penetration portion side engagement mechanism 192, and a displacement amount measurement mechanism side coupling mechanism 193.

  The first cylindrical body 191 is a cylindrical member. The first cylindrical body 191 is arranged such that its central axis coincides with the central axis of the coil spring 180 (penetration central axis 14A). In this case, the first cylindrical body 191 extends along the axial direction of the central axis of the coil spring 180 (penetration central axis 14A).

  In addition, the inner peripheral surface of the first cylindrical body 191 surrounds the outer peripheral surface of the coil spring 180. The diameter of the inner peripheral side of the first cylindrical body 191 may be a diameter such that a play is given between the inner peripheral surface of the first cylindrical body 191 and the outer peripheral surface of the coil spring 180, or the first cylindrical body The diameter may be such that the inner circumferential surface 191 and the outer circumferential surface of the coil spring 180 substantially abut. That is, the diameter of the inner peripheral side of the first cylindrical body 191 is slightly larger than the diameter of the outer peripheral side of the coil spring 180 or substantially the same as the diameter of the outer peripheral side of the coil spring 180.

  Moreover, the 1st cylinder 191 has the thin part 191C in at least one part of the proximal end of self. The thin portion 191C is formed by recessing at least a part of the base end side and the outer peripheral surface side of the first cylindrical body 191 in the thickness direction.

  The penetration part side engagement mechanism 192 is a mechanism which makes the penetration part 14 and the 1st cylinder 191 engage. The penetration portion side engagement mechanism 192 is configured of, for example, a step surface 192A provided on the tip end side of the first cylindrical body 191 and a proximal end surface 14B of the penetration portion 14. The stepped surface 192A is formed by recessing the tip end side and the inner peripheral surface side of the first cylindrical body 191 in the thickness direction. When the proximal end face 14B of the penetrating portion 14 and the step surface 192A abut on each other, the penetrating portion 14 and the first cylindrical body 191 are engaged. In the state where the penetration portion 14 and the first cylindrical body 191 are engaged, the penetration portion 14 and the first cylindrical body 191 may be fixed by a screw or the like.

  The displacement amount measurement mechanism side coupling mechanism 193 is a mechanism that couples the displacement amount measurement mechanism 16 and the first cylindrical body 191. The displacement amount measurement mechanism side coupling mechanism 193 includes, for example, a screw 193A, a thin plate portion 191C, a screw groove 191D provided in the thin plate portion 191C, and a hole 160A provided in the displacement amount measurement mechanism 16.

  The screw 193A has an external thread. The screw groove 191D is provided in the thin plate portion 191C, and has a female screw portion screwed with the screw 193A.

  The holes 160A provided in the displacement amount measuring mechanism 16 are holes penetrating the movable body 160 in the displacement amount measuring mechanism 16 described later in the plate thickness direction. The screw 193A and the hole 160A are configured such that, even if the screw 193A is passed through the hole 160A, the circumferential surface portion forming the hole 160A engages with the head of the screw 193A and does not pass the screw 193A. Therefore, after moving body 160 of displacement amount measuring mechanism 16 abuts on the outer peripheral surface of thin plate portion 191C so that hole 160A and screw groove 191D coincide with each other, screw 193A is tightened through hole 160A and screw groove 191D. The moving body 160 of the displacement amount measuring mechanism 16 and the first cylindrical body 191 are connected.

  Since penetration part 14 and the 1st cylinder part 190 are constituted as mentioned above, if penetration part 14 receives the load which met in the direction of an axis of penetration part central axis 14A, the 1st cylinder part 190 will be a displacement amount measurement mechanism It can move along the axial direction of the penetration center axis 14A together with the 16 moving bodies 160.

  The second cylindrical portion 195 includes a second cylindrical body 196 and a proximal end case coupling mechanism 197. The second cylindrical body 196 is a cylindrical member. The second cylindrical body 196 is arranged such that its central axis coincides with the central axis of the first cylindrical body 191 (penetration central axis 14A). In this case, the second cylindrical body 196 extends along the axial direction of the central axis of the first cylindrical body 191 (penetration central axis 14A).

  In addition, the inner peripheral surface of the second cylindrical body 196 surrounds the outer peripheral surface of the first cylindrical body 191. The diameter of the inner peripheral side of the second cylindrical body 196 may be a diameter such that there is play between the inner peripheral surface of the second cylindrical body 196 and the outer peripheral surface of the first cylindrical body 191, or The diameter may be such that the inner peripheral surface of the two cylindrical body 196 and the outer peripheral surface of the first cylindrical body 191 substantially abut. That is, the diameter on the inner peripheral side of the second cylindrical body 196 is slightly larger than the diameter on the outer peripheral side of the first cylindrical body 191, or substantially the same as the diameter on the outer peripheral side of the first cylindrical body 191.

  The flanged cylindrical portion 220 is inserted into the second cylindrical body 196 through the distal end side opening 196A. The flanged cylindrical portion 220 is configured of a cylindrical portion 221 and a flange portion 222. The flange portion 222 protrudes radially outward from one end surface of the cylindrical portion 221. When the cylindrical portion 221 is inserted into the second cylindrical body 196 and pushed in, the flange portion 222 is engaged with the tip end surface of the second cylindrical body 196. Thus, the flanged cylindrical portion 220 is attached to the second cylindrical body 196. Further, the internal passage 225 of the flanged cylindrical portion 220 is shaped to allow the conical body 141 of the penetration portion 14 to pass therethrough. In the state where penetration part 14 is not receiving load, penetration part 14 is preferably arranged so that the base end side end face of conical body 141 matches opening face 224 of the tip side opening of flange cylinder part 220. .

  The base end side housing connection mechanism 197 connects the base end side housing 131 which is the base end side portion of the housing 13 and the second cylindrical body 196. The housing 13 is composed of a distal end side housing 130 and a proximal end side housing 131. The distal end side housing 130 and the proximal end side housing 131 are connected along the axial direction of the penetration center axis 14A. In the present embodiment, the distal end side housing 130 is configured by the second cylindrical body 196.

  The proximal end side housing connection mechanism 197 includes, for example, a screw, a thread groove provided in the second cylindrical body 196, and a hole provided in the proximal end side housing 131. The displacement amount measurement mechanism side connection mechanism 193 and the base end side case connection mechanism 197 are the same, and the screw, screw groove and hole in the base end side case connection mechanism 197 are a screw 193A and a screw, respectively. It corresponds to the groove 191D and the hole 160A. Therefore, the description of the displacement amount measurement mechanism side connection mechanism 193 can be applied to the base end side case connection mechanism 197 as appropriate.

  The second cylindrical portion 195 configured as described above guides the coil spring 180 so as to be extended and contracted along the axial direction of the penetration central axis 14A, and the penetration portion 14 and the first tubular portion 190 are central to the penetration. It is guided to be moved along the axial direction of the axis 14A.

  Further, the outer peripheral surface of the second cylindrical body 196 constitutes a grip portion 198. Note that, in order to increase the gripping force of the gripping portion 198, for example, a gripping member 199 made of an elastomer may be wound around the outer peripheral surface of the second cylindrical body 196.

  As shown in FIG. 3A, the housing 13 (base side) is disposed closer to the base end side (display side 12 side) than the grip portion 198 when viewed from the axial direction (tip end side) of the penetration central axis 14A. It is preferable that at least a part of the outer edge of the end housing 131) protrudes more than the outer edge of the grip portion 198. This is to make it difficult for the user of the soil hardness measurement device 1 to grip the portion other than the grip portion 198.

  Among them, as shown in FIG. 3B, it is particularly preferable that at least the outer edge portion of the housing 13 corresponding to the display portion 12 protrudes more than the outer edge of the grip portion 198. This is to make it difficult for the user of the soil hardness measurement device 1 to grip the portion corresponding to the display unit 12. Further, as in the case of FIG. 3 (B), when the number of projecting portions of the casing 13 (proximal side casing 131) protruding more than the outer edge of the grip portion 198 is smaller as in the case of FIG. 3 (A). The distance between the grips 198 can be increased. As a result, the soil hardness measuring device 1 is more easily grasped by the user.

  Further, as shown in FIG. 3B, even when the outer peripheral surface of the proximal end side casing 131 on the base end side in the axial direction of the penetration portion central axis 14A is made more to the grip portion 198A than the display portion 12 is. Good. In this case, the grip portion is provided on both the distal end side and the proximal end side in the axial direction of the penetration center axis 14A rather than the display portion 12, so that the soil hardness measurement device 1 grips even more for the user. It becomes easy to be done.

<Base end side movement restriction part>
Next, the proximal movement restricting unit 20 will be described with reference to FIG. The proximal end side movement restricting portion 20 restricts the movement of the biasing portion 18 to the proximal end side in the axial direction of the penetration center axis 14 </ b> A than itself. As shown in FIG. 4A, the base-end-side movement restricting unit 20 includes, for example, a stopper 200, a stopper-side connecting mechanism 201, and a biasing-side engaging mechanism 202.

  The stopper portion 200 is fixed inside the housing 13 by the stopper portion side connection mechanism 201 as shown in FIGS. 4 (A) and 4 (B). The placement position of the stopper portion 200 may be any inside the casing 13, but, for example, the vicinity of the boundary between the distal end side casing 130 and the proximal end side casing 131 may be mentioned as an example. The stopper portion 200 prevents movement of the coil spring 180 to the proximal end side in the axial direction of the penetration portion central axis 14A more than the stopper portion 200 itself.

  The stopper portion 200 has a first column body 203 and a second column body 204. The area of the base end side bottom surface of the second column 204 is smaller than the area of the tip side bottom surface of the first column 203. In addition, the base end side bottom surface of the second column body 204 is disposed in the tip side bottom surface of the first column body 203. The second column 204 is erected from the bottom surface on the tip end side of the first column 203. At this time, the central axes of the first column 203 and the second column 204 are in the same direction. And the stopper part 200 is arrange | positioned inside the housing | casing 13 so that the central axis of the 1st pillar 203 and the 2nd pillar 204 may extend along the axial direction of penetration part central axis 14A.

  As shown in FIG. 4B, the first pillar 203 has a contact outer peripheral surface 203A and a non-contact outer peripheral surface 203B. The contact outer peripheral surface 203 </ b> A refers to a surface of the outer peripheral surface of the first pillar 203 that contacts the inner peripheral surface of the housing 13. The non-contacting outer peripheral surface 203 </ b> B refers to a surface of the outer peripheral surface of the first pillar 203 which does not contact the inner peripheral surface of the housing 13. A passage 205 is formed between the non-contacting outer peripheral surface 203 B and the inner peripheral surface of the housing 13.

  The passage 205 is formed to extend in the axial direction of the penetration center axis 14A. The moving body 160 of the displacement amount measuring mechanism 16 is disposed so as to extend from the distal end side housing 130 side to the proximal end side housing 131 through the passage 205.

  The stopper portion side connection mechanism 201 includes, for example, a screw 201A, a screw groove 200D provided in the stopper portion 200, and a hole 13A provided in the housing 13 as shown in FIGS. 4 (A) and 4 (B). . The displacement amount measurement mechanism side connection mechanism 193 and the stopper portion side connection mechanism 201 are the same, and the screw 201A, the screw groove 200D and the hole 13A correspond to the screw 193A, the screw groove 191D and the hole 160A, respectively. It is Therefore, the description of the displacement amount measurement mechanism side coupling mechanism 193 can be applied to the stopper portion side coupling mechanism 201 as appropriate.

  The biasing unit side engagement mechanism 202 engages the coil spring 180 and the stopper portion 200. As shown in FIG. 4A, the biasing unit side engagement mechanism 202 includes, for example, a first pillar tip end bottom surface 203C, which is a tip end bottom surface of the first pillar 203, and an outer periphery of the second pillar 204. It is comprised by the 2nd column outer peripheral surface 204A which is a surface, and the coil spring base end part 180B which is a base end part of the coil spring 180. FIG. The coil spring 180 and the stopper portion 200 are engaged by the coil spring base end portion 180B being in contact with the first pillar distal end bottom surface 203C and the second pillar outer peripheral surface 204A.

<Displacement measurement mechanism>
Next, the displacement amount measurement mechanism 16 will be described with reference to FIGS. The displacement amount measuring mechanism 16 measures the displacement amount of the penetration portion 14 from the reference position. The reference position refers to the position of the penetration 14 in a state where the penetration 14 is not loaded. As a reference position, the position of penetration part 14 where base end side end face 141C of conical body 141 matches opening surface 224 of the tip side opening of flange cylinder part 220 in the state where penetration part 14 is not receiving load. Is preferred (see FIG. 8A). As shown in FIG. 1, the displacement amount measurement mechanism 16 includes, for example, a moving body 160, a sliding body 161, and a fixed body 162, as shown in FIGS.

  The movable body 160 is configured of, for example, a rod-like member. One end on the tip side of the moving body 160 is connected to the first cylindrical body 191. When connected to the first cylindrical body 191, the movable body 160 extends in the axial direction of the penetration central axis 14A and is disposed to pass through the passage 205. In addition, the moving body 160 moves along with the penetration portion 14 in the axial direction of the penetration portion central axis 14A. The sliding body 161 slides on a sliding surface 163 described later. The sliding body 161 is fixed to the moving body 160. Therefore, the sliding body 161 also moves along the axial direction of the penetration center axis 14A.

  The fixed body 162 has a sliding surface 163, as shown in FIG. The sliding surface 163 is a plane. The fixed body 162 is disposed at a position where the sliding body 161 and the sliding surface 163 can come into contact with each other at least in the movable range of the sliding body 161. In this case, the sliding body 161 is provided on the facing surface 160B of the moving body 160. The facing surface 160 B is a surface of the moving body 160 facing the sliding surface 163. The opposing surface 160B and the sliding surface 163 are parallel. Information corresponding to the position of the sliding body 161 on the sliding surface 163 is output from the fixed body 162.

  As shown in the upper part of FIG. 5, the sliding body 161 is disposed to abut on the sliding surface 163 at the position L 0 on the sliding surface 163 in the state where the penetration portion 14 is disposed at the reference position. When the penetration portion 14 penetrates into the soil, the sliding body 161 moves in contact with the sliding surface 163. Then, as shown in the lower part of FIG. 5, the sliding body 161 moves to the measurement end position L 1 on the sliding surface 163. In this case, information corresponding to the measurement end position L1 (displacement amount L) is output from the fixed body 162.

  As the displacement amount measuring mechanism 16, a potentiometer type mechanism can be mentioned as an example. In this case, the fixed body 162 includes, for example, a resistor having a resistance. Terminals T1 and T2 are provided at both ends of the resistor of the fixed body 162, as shown in FIG. Further, the sliding body 161 or the moving body 160 is provided with a terminal T3. In this case, the resistance value between the terminal T1 and the terminal T3 or the resistance value between the terminal T2 and the terminal T3 changes depending on the position of the sliding member 161. Information corresponding to the measurement end position L1 (displacement amount L) is output from the fixed body 162 by utilizing this.

<Control unit>
<Control unit hardware configuration>
Next, the hardware configuration of the control unit 17 will be described with reference to FIG. The control unit 17 performs each control of the soil hardness measurement device 1, and is mounted on the surface side of the electronic circuit board 100. As shown in FIG. 6, the control unit 17 includes, for example, a central processing unit (CPU) 101, a random access memory (RAM) 102, a read only memory (ROM) 103, a storage medium 104, and a displacement amount measuring mechanism. An interface 105, an operation reception interface 106, a display control unit 107, a light source interface 108A, a light reception interface 108B, a power supply interface 109A, a device connection interface 109B, and a wireless communication unit 109C. In FIG. 6, the interface is denoted as I / F.

  The CPU 101 is in charge of the entire processing in the soil hardness measuring device 1, and uses the RAM 102 as a work area. For example, various programs executed by the CPU 101 are written in the ROM 103. The storage medium 104 is configured by, for example, a flash memory or the like. The storage medium 104 functions as, for example, a storage place of data processed by the CPU 101.

  The displacement amount measurement mechanism interface 105 transmits the measurement result of the displacement amount measurement mechanism 16 to the CPU 101. The CPU 101 performs various arithmetic processing based on the information of the measurement result sent from the displacement amount measurement mechanism interface 105.

  The operation reception interface 106 transmits the external operation received by the operation reception unit 800 to the CPU 101. The operation receiving unit 800 corresponds to, for example, a power button 40, a determination button 41, and a mode transition button 42 described later (see FIG. 12).

  The display control unit 107 causes the liquid crystal display 810 to perform display in accordance with an instruction from the CPU 101. The liquid crystal display 810 corresponds to the display unit 12.

  The light source interface 108 </ b> A transmits an instruction from the CPU 101 to the light source 820. The light source 820 is turned on / off in accordance with an instruction from the CPU 101. The light source 820 is configured by, for example, an LED. The light source 820 corresponds to the irradiation unit 37 in the displacement amount measurement mechanism 36 described later (see FIG. 15).

  The light reception interface 108 B transmits information of the electric signal sent from the light receiving element 830 to the CPU 101. The CPU 101 performs various arithmetic processing based on the information of the electrical signal. The light receiving element 830 corresponds to the light receiving unit 38 in the displacement amount measuring mechanism 36 described later (see FIG. 15).

  The power supply interface 109 </ b> A supplies the power supplied from the battery 110 to each part of the control unit 17. The device connection interface 109 </ b> B transmits information to the external device 840 and receives information from the external device 840. As the device connection interface 109B, for example, one based on the USB (Universal Serial Bus) standard can be mentioned as an example, but it is not limited to this, and may be based on other bus standards. The wireless communication unit 109C performs wireless communication with the outside. For example, although Bluetooth (registered trademark) is given as an example of the wireless communication unit 109C, the present invention is not limited to this, and may be based on another wireless communication standard. The control unit 17 may be equipped with a GPS (Global Positioning System).

<Functional configuration of control unit>
Next, the functional configuration of the control unit 17 will be described with reference to FIGS. As shown in FIG. 7, the control unit 17 includes a displacement amount calculation unit 171, a hardness calculation unit 172, a data storage unit 173, a data deletion unit 174, a reference position calibration unit 175, and a scale calibration unit 176. An error detection unit 177 and a data transmission unit 178 are provided.

  The displacement amount calculation unit 171 calculates the displacement amount of the penetrating portion 14 based on the position of the sliding body 161 on the sliding surface 163 of the fixed body 162. When the displacement amount measurement mechanism 16 is a potentiometer type mechanism, for example, the penetration portion 14 is formed based on the resistance value between the terminal T1 and the terminal T3 in FIG. 5 or the resistance value between the terminal T2 and the terminal T3. The displacement amount is calculated by the displacement amount calculation unit 171.

  The hardness calculation unit 172 calculates the hardness of the soil based on the calculation result of the displacement amount calculation unit 171.

  The data storage unit 173 stores the calculation result of the hardness calculation unit 172. The storage process in the data storage unit 173 may be configured to be performed in response to an operation from the outside, or may be performed automatically after the calculation in the hardness calculation unit 172 is completed. Further, the data storage unit 173 may store the calculation result in the hardness calculation unit 172 in association with the measurement position or the current position determined by the GPS. Moreover, the calculation result in the displacement amount calculation unit 171 may be included in the storage target in the data storage unit 173.

  Further, the data erasing unit 174 is configured to delete the past calculation result in the hardness calculating unit 172 in response to an operation from the outside. The deletion of the past calculation results in the stored hardness calculation unit 172 may be performed collectively for the entire stored calculation results, or may be performed for each individual data. Good. Moreover, the calculation result in the displacement amount calculation unit 171 may be included in the deletion target in the data deletion unit 174.

  The reference position calibration unit 175 calibrates the position of the penetration portion 14 at the present time to a reference position in response to an operation from the outside. It is most preferable that the above operation relating to the calibration of the reference position be performed from the outside in a state where the penetration portion 14 is not receiving a load.

  At the time of factory shipment, the reference position is set in a state where the proximal end surface of the conical body 141 coincides with the opening surface 224 of the distal end opening of the flange cylindrical portion 220 (see FIG. 8A). However, if the use of the soil hardness measuring device 1 is repeated, a case may be assumed where the coil spring 180 is worn down. In this case, the total length of the coil spring 180 is shortened, and the proximal end face 141C of the conical body 141 is positioned inside the distal end casing 130 (see FIG. 8B). That is, a part of the conical body 141 is in a state of being immersed into the inside of the distal end side housing 130. In this case, the state is different from the time of factory shipment. In such a case, it is necessary to set the reference position again. For this reason, a reference position calibration unit 175 is provided.

  The scale calibration unit 176 calibrates the scale of the distance in consideration of the distance between the current position of the penetration portion 14 and the reference position as a reference maximum displacement amount in response to an operation from the outside. . In addition, the maximum displacement of the penetration part 14 set beforehand is defined as a "reference maximum displacement." In the reference maximum displacement amount, the proximal end face 141C of the conical body 141 matches the opening face 224 of the distal end opening of the flange cylindrical portion 220 in a state where the penetration portion 14 is not receiving a load (FIG. A) Refer to the maximum displacement of the penetration part 14 in (A). Specifically, the reference maximum displacement amount corresponds, for example, to the axial length D of the penetration central axis 14A of the conical body 141 in the penetration 14 (see FIG. 8A). When the penetration portion 14 is pushed into the housing 13 and the top portion 141B of the conical body 141 is positioned on the opening surface 224 of the distal end side opening of the flange cylindrical portion 220 (see FIG. 8C), It is preferable that the above-mentioned operation regarding calibration be performed.

  For example, when the coil spring 180 recedes and a part of the proximal end side of the conical body 141 is inserted into the distal end side housing 130 (refer to FIG. 8B), the insertion amount is reduced compared to the reference maximum displacement amount. The maximum displacement of the penetration portion 14 from the reference position is shortened by the length as described above. It is assumed that the shortened maximum displacement of the penetration portion 14 is, for example, a distance of 8/9 times the reference maximum displacement. In this case, the scale calibration unit 176 calibrates the scale of the maximum displacement of the shortened penetration 14 to 8/9. Under this condition, the displacement amount calculation unit 171 calculates the displacement amount of the penetration portion 14.

  The error detection unit 177 detects an error when the distance between the position of the penetration unit 14 at the current time and the reference position is smaller than a predetermined threshold value in the processing in the scale calibration unit 176. If an error is detected, that may be displayed on the display unit 12, for example. Moreover, error detection may be notified by other notification means (for example, warning sound, warning light).

  For example, when about half of the conical body 141 is inserted inside the distal end side housing 130, if the above-mentioned operation on scale calibration is performed erroneously, the maximum displacement of the penetrating portion 14 from the reference position is halved. It will The error detection unit 177 is useful for informing the user of the soil hardness measurement device 1 that this is obviously an operation error.

  The data transmission unit 178 transmits the calculation result of the displacement amount calculation unit 171 and / or the hardness calculation unit 172 to an external device. Further, the data transmission unit 178 transmits the data stored in the data storage unit 173 to the external device. The transmission process in data transmission section 178 may be performed in response to an operation from the outside, or after calculation processing in displacement amount calculation section 171 and / or hardness calculation section 172, and at the time of data storage in data storage section 173. It may be performed automatically at the same time.

  The displacement amount calculation unit 171 is realized, for example, by the CPU 101 processing information transmitted through the displacement amount measurement mechanism interface 105 according to a program stored in the ROM 103 or the storage medium 104 or the like. The hardness calculation unit 172 is realized, for example, by the CPU 101 processing information on the displacement amount calculated by the displacement amount calculation unit 171 according to a program stored in the ROM 103, the storage medium 104, or the like. The data storage unit 173 is realized, for example, by the CPU 101 processing information calculated by the hardness calculation unit 172 or the like according to a program stored in the ROM 103 or the storage medium 104 or the like. Then, the CPU 101 stores the processing result in the storage medium 104. The data erasing unit 174 is realized, for example, by the CPU 101 processing information stored in the storage medium 104 according to a program stored in the ROM 103 or the storage medium 104 or the like. The reference position calibration unit 175 and the scale calibration unit 176 are implemented by processing by the CPU 101 according to a program stored in the ROM 103, the storage medium 104, etc., using information transmitted through the operation reception interface 106 as a trigger, for example. The error detection unit 177 is realized, for example, by the CPU 101 processing information calculated by the scale correction unit 176 according to a program stored in the ROM 103 or the storage medium 104 or the like. The data transmission unit 178 is realized by, for example, the wireless communication unit 109C.

<Power supply unit>
Next, the power supply unit 11 will be described with reference to FIGS. As shown in FIG. 9A, the power supply unit 11 includes a battery 110, a battery holding unit 111, terminals 112A and 112B corresponding to the anode and the cathode of the battery 110, and a battery holding unit connecting mechanism 113. And

  The battery 110 may be, for example, a dry battery, but is not limited to this, and may be a battery of another aspect (for example, a button battery, a lithium battery, etc.). Also, the battery 110 may be either rechargeable or non-rechargeable. Hereinafter, the battery 110 will be described as a pillar-shaped dry battery. Further, in the present embodiment, only one battery 110 is described as being set in the battery holding unit 111, but the present invention also includes the case where a plurality of batteries 110 are set.

  The battery holding unit 111 has a structure for holding the battery 110, and as shown in FIG. The battery holding structure in the battery holding portion 111 holds the battery 110 such that the longitudinal direction of the battery 110 is parallel to the penetration central axis 14A.

  Battery holding portion 111 has at least battery peripheral surface contact wall 115 and a pair of electrode facing peripheral walls 116A and 116B. The battery circumferential contact wall 115 has a battery contact surface 115A. The battery contact surface 115 </ b> A is a surface that contacts at least a part of the circumferential surface 110 </ b> A of the battery 110. The battery contact surface 115 </ b> A has a shape corresponding to the shape of the battery 110.

  The pair of electrode facing peripheral walls 116A and 116B are peripheral walls facing the anode and the cathode of the battery 110, and are erected in a direction perpendicular to the battery contact surface 115A from the battery contact surface 115A. Further, terminals 112A and 112B are provided on the pair of electrode facing peripheral walls 116A and 116B, respectively.

  Battery 110 is housed in battery housing space 117 surrounded by battery circumferential surface contact wall 115 and a pair of electrode facing circumferential walls 116A and 116B. The battery accommodating space 117 is a space in which the battery 110 is accommodated. Battery holding portion 111 is arranged such that the longitudinal direction of battery housing space 117 is parallel to penetration central axis 14A.

  In this case, the length of the battery contact surface 115A in the longitudinal direction corresponds to the length of the battery 110 in the longitudinal direction. The battery contact surface 115A is disposed in the proximal housing 131 so that its longitudinal direction is parallel to the penetration central axis 14A. Further, the length in the short direction of the battery contact surface 115A corresponds to the length in the width direction of the battery 110.

  Further, when the battery 110 is set in the battery holding portion 111, the pair of electrode facing peripheral walls 116A and 116B abut on the electrode forming surfaces 110B and 110C of the battery 110, respectively. The pair of electrode facing peripheral walls 116A and 116B are erected to face the shaft 110D of the battery 110 with a predetermined distance therebetween. The predetermined distance is a distance corresponding to the distance between the electrode formation surfaces 110B and 110C.

  Further, as shown in FIG. 9 (B), a pair of battery peripheral surface facing peripheral walls 116C and 116D may be provided. The pair of battery peripheral surface facing peripheral walls 116C and 116D is a peripheral wall facing the peripheral surface 110A of the battery 110, and is erected in a direction perpendicular to the battery contact surface 115A from the battery contact surface 115A. The pair of battery peripheral surface facing peripheral walls 116C and 116D are erected along the axial direction of the shaft 110D of the battery 110 at a predetermined distance apart. The predetermined distance corresponds to the width of the battery 110.

  When the pair of battery peripheral surface opposing peripheral walls 116C and 116D are provided, as shown in FIG. 9B, the pair of electrode opposing peripheral walls 116A and 116B and the pair of battery peripheral surface opposing peripheral walls 116C and 116D, The four sides of the battery 110 are enclosed.

  Further, on the side facing the battery peripheral surface contact wall 115, an insertion opening 114A for inserting the battery 110 into the battery housing space 117 is provided. A battery cover 116E is provided on the insertion opening 114A in a removable manner. The battery cover 116E may be provided as a part of the battery holding portion 111 as shown in FIG. 9A, or may be provided as a part of the housing 13 as shown in FIG.

  As described above, when the battery holding portion 111 is disposed in the base end side housing 131, the battery 110 is disposed in the housing 13 so that the longitudinal direction of the battery 110 is parallel to the penetration center axis 14A. The soil hardness measuring device 1 can be made into an elongated slim shape.

  The battery holder connection mechanism 113 includes a connection frame 118 and a connection frame connection mechanism 119, as shown in FIG. 9A. The connection frame 118 is a frame that connects the battery holding unit 111 and the base end side movement restriction unit 20. The connection frame 118 is formed in a substantially L shape. Further, the substantially L-shaped upstanding portion 118A of the connection frame 118 is disposed so as to extend in parallel with the battery peripheral surface contact wall 115 on the opposite surface 115B side of the battery contact surface 115A. Then, as shown in FIG. 9A, the substantially L-shaped rising portion 118A of the connection frame 118 is connected to the battery circumferential surface contact wall 115 at two points on the opposite surface 115B. Further, the substantially L-shaped proximal end 118 B of the connection frame 118 is disposed to abut on the proximal end surface 200 A of the stopper 200.

  The coupling frame coupling mechanism 119 couples the coupling frame 118 and the proximal end movement restricting portion 20 (stopper portion 200). The connection frame connection mechanism 119 includes, for example, a screw 119A, a screw groove 200E provided in the base end side movement restricting portion 20 (stopper portion 200), and a hole provided in the connection frame 118 (base end portion 118B having a substantially L shape). And 118C. The displacement amount measurement mechanism side connection mechanism 193 and the connection frame connection mechanism 119 are similar to each other, and the screw 119A, the screw groove 200E and the hole 118C correspond to the screw 193A, the screw groove 191D and the hole 160A, respectively. It is a thing. Therefore, the description of the displacement amount measurement mechanism side coupling mechanism 193 can be applied to the coupling frame coupling mechanism 119 as appropriate.

  In addition, the USB terminal holding unit 114 is provided in the battery holding unit 111. Specifically, the USB terminal holding portion 114 is provided at the proximal end of the battery circumferential surface contact wall 115. The USB terminal holding unit 114 holds a USB terminal so as to be connectable to an external device.

<Case>
Next, the housing 13 will be described with reference to FIGS. The housing 13 accommodates the hardness measurement unit 10, the power supply unit 11, and the display unit 12, and includes the distal end side housing 130 and the proximal end side housing 131 as described above. And the front end side case 130 and the base end side case 131 are connected along the axial direction of penetration part central axis 14A. The present invention also includes the case where the distal end side housing 130 and the proximal end side housing 131 are integrally formed along the axial direction of the penetration center axis 14A.

  As shown in FIG. 1, for example, the penetration portion 14 and the displacement portion 15, and a part (moving body 160) of the displacement amount measurement mechanism 16 are accommodated in the tip end side housing 130. In the present embodiment, the distal end side housing 130 is configured by the second cylindrical body 196, but is not limited to this, and may be configured by a member separate from the second cylindrical body 196. And the flanged cylinder part 220 is attached to the front end side of the 2nd cylinder 196 (front end side case 130).

  As shown in FIG. 1, in the base end side housing 131, for example, the power supply unit 11, the display unit 12, a part of the displacement amount measuring mechanism 16 (fixed body 162 etc.), and the control unit 17 on the surface side. And the electronic circuit board 100 mounted on the That is, as shown in FIG. 10, the proximal housing 131 has a first housing portion 132 capable of housing the display portion 12, a second housing portion 133 capable of housing the electronic circuit board 100, and a displacement amount measuring mechanism. It has a third accommodating portion 134 capable of accommodating a part of the 16 (fixed member 162 and the like) and a fourth accommodating portion 135 capable of accommodating the power supply unit 11.

  The first accommodation portion 132, the second accommodation portion 133, the third accommodation portion 134, and the fourth accommodation portion 135 are arranged in order along the axial direction of the vertical axis 14C perpendicular to the penetration central axis 14A. That is, the display unit 12, the electronic circuit board 100, a part of the displacement amount measuring mechanism 16 (such as the fixed body 162), and the power supply unit 11 are each along the axial direction of the vertical axis 14C perpendicular to the penetration central axis 14A. Arranged in order. Hereinafter, the “vertical axis 14C perpendicular to the penetration center axis 14A” will be simply referred to as the “vertical axis 14C”.

  The first accommodating portion 132 has a display portion accommodating space 132A. The display unit 12 is accommodated in the display unit accommodation space 132A. The display unit 12 is held by a display unit holding mechanism (not shown) in the display unit accommodation space 132A.

  Further, in the base end side housing 131 in the vicinity of the first accommodation portion 132, a display portion visual recognition opening 131C is provided. The display part visual recognition opening 131 C is an opening provided in the base end side housing 131. In the display portion accommodation space 132A, the display portion 12 is arranged such that a perpendicular to the display screen of the liquid crystal panel constituting the display portion 12 is parallel to the vertical axis 14C and that the display screen is directed to the display portion visual opening 131C side. Be done. Thereby, the display screen of the liquid crystal panel constituting the display unit 12 can be visually recognized from the outside through the display unit visual recognition opening 131C.

  The second housing portion 133 has an electronic circuit board housing space 133A. The electronic circuit board 100 is accommodated in the electronic circuit board accommodation space 133A. The electronic circuit board 100 is held by the electronic circuit board holding mechanism (not shown) in the electronic circuit board housing space 133A. In the electronic circuit board accommodation space 133A, the electronic circuit board 100 is preferably arranged so that the perpendicular to its surface is parallel to the vertical axis 14C and the surface of the electronic circuit board 100 faces the first accommodation portion 132 side.

  The third housing portion 134 has a displacement amount measurement mechanism housing space 134A. A part of the displacement amount measurement mechanism 16 is accommodated in the displacement amount measurement mechanism accommodation space 134A. In the displacement amount measurement mechanism accommodation space 134A, a part of the displacement amount measurement mechanism 16 is held by an electronic circuit board holding mechanism (not shown). In the displacement amount measurement mechanism accommodation space 134A, a part of the displacement amount measurement mechanism 16 is disposed along the axial direction of the penetration center axis 14A.

  Specifically, the displacement amount measurement mechanism accommodation space 134A has a fixed body accommodation space 134C and a linearly movable space 134D. The fixed body accommodation space 134C and the linearly movable space 134D are disposed along the axial direction of the vertical axis 14C. The fixed body accommodation space 134C is disposed on the second accommodation portion 133 side. The linearly movable space 134D is disposed on the fourth accommodation portion 135 side.

  The fixed body 162 is accommodated in the fixed body accommodation space 134C. In the fixed body accommodation space 134C, the fixed body 162 is fixed so as to extend along the axial direction of the penetration central axis 14A. At this time, the fixed body 162 is preferably fixed to the back surface of the electronic circuit board 100. Then, in a state where the fixed body 162 is fixed to the back surface of the electronic circuit board 100, it is preferable to further electrically connect the electronic circuit board 100 and the fixed body 162.

  The movable body 160 and the sliding body 161 are accommodated in the linearly movable space 134D. In the linearly movable space 134D, the moving body 160 and the sliding body 161 move in the axial direction of the penetration center axis 14A.

  The fourth accommodating portion 135 has a power supply portion accommodating space 135A. In the power supply portion accommodation space 135A, the power supply portion 11 is accommodated. The power supply unit 11 is held by the power supply unit holding mechanism (not shown) in the power supply unit accommodation space 135A. The power supply unit holding mechanism corresponds to the battery holding unit connecting mechanism 113.

  The battery cover 116E in the power supply unit 11 is disposed on the opposite side of the display portion accommodation space 132A. That is, the battery cover 116E is provided on the opposite side of the display unit 12 as viewed in the axial direction of the vertical axis 14C.

  Further, as shown in FIG. 1, the proximal end surface of the proximal casing 131 has an opening 131A. The USB terminal holding unit 114 is disposed near the opening 131A. A cap 136 shown in FIG. 1 is used to cover the opening 131A. If the cap 136 is removed from the opening 131A, the USB terminal is exposed to the outside, and the soil hardness measuring device 1 and the external device can be connected by USB.

<Arrangement of each component>
Next, with reference to FIG. 11, the arrangement aspect of each component in the soil hardness measuring device 1 will be described. In the soil hardness measuring device 1, as shown in FIG. 11A, the penetration portion 14, the displacement portion 15, and the battery holding portion 111 are disposed along the axial direction of the penetration portion central axis 14A. Further, the penetration portion 14, the displacement portion 15, and the battery holding portion 111 have overlapping portions when viewed from the tip end side (observer 900 side) of the penetration center axis 14A in the axial direction.

  Further, in the soil hardness measuring device 1, as shown in FIG. 11A, the display unit 12, the control unit 17, the displacement amount measuring mechanism 16 and the battery holding unit 111 are disposed along the axial direction of the vertical axis 14C. ing. Further, when viewed from the display unit 12 side (observer 910 side) in the axial direction of the vertical axis 14C, the display unit 12, the control unit 17, the displacement amount measuring mechanism 16 and the battery holding unit 111 have overlapping portions.

  Here, when viewed from the display unit 12 side (observer 910 side) in the axial direction of the vertical axis 14C, attention is paid to the portion R where the displacement amount measurement mechanism 16 and the battery holding unit 111 overlap. In the overlapping portion R, the moving body 160 and the battery holding portion 111 are disposed. When the moving body 160 and the battery holding portion 111 overlap with each other when viewed from the tip end side (observer 900 side) of the penetration center axis 14A in the axial direction, the movement of the moving body 160 is interrupted by the battery holding portion 111 . Therefore, in the overlapping portion R, the displacement amount measurement mechanism 16 is configured so that the displacement amount measurement mechanism 16 and the battery holding portion 111 do not overlap when viewed from the tip end side (observer 900 side) of the penetration central axis 14A in the axial direction. And the battery holding part 111 needs to be arrange | positioned.

  As shown in FIGS. 11B and 11C, in the soil hardness measuring device of the present invention, the penetration portion 14, the displacement portion 15, and the battery holding portion 111 are in order along the axial direction of the penetration portion central axis 14A. If arranged, the battery holding portion 111 may or may not overlap the penetration portion 14 and the displacement portion 15 when viewed from the tip end side (observer 900 side) of the penetration center axis 14A in the axial direction. All such are included in the present invention.

  Further, as shown in FIGS. 11B and 11C, in the soil hardness measuring device of the present invention, the display unit 12, the control unit 17 and the battery holding unit 111 are disposed along the axial direction of the vertical axis 14C. Thus, when viewed from the display unit 12 side (observer 910 side) in the axial direction of the vertical axis 14C, the display unit 12, the control unit 17, the displacement amount measuring mechanism 16 and the battery holding unit 111 may or may not overlap each other. And all such are included in the present invention.

<Button>
Next, with reference to FIG. 12, the button in the soil hardness measuring device 1 in the present embodiment will be described. The power button 40 is a power button in the soil hardness measuring device 1. The determination button 41 is a button for performing determination in various modes in the soil hardness measurement device 1. The mode transition button 42 is a button for transitioning between various modes in the soil hardness measuring device 1. When the mode transition button 42 is pressed, the current mode is shifted to another mode.

  As various modes in the soil hardness measuring apparatus 1, for example, a reference position calibration mode corresponding to the reference position calibration unit 175, a scale calibration mode corresponding to the scale calibration unit 176, a measurement data storage mode, a measurement data deletion mode, a calibration value deletion mode Etc.

  The reference position calibration mode is a mode corresponding to the reference position calibration unit 175. The scale calibration mode is a mode corresponding to the scale calibration unit 176. The measurement data storage mode is a mode for storing measurement data. The measurement data deletion mode is a mode for deleting stored measurement data. The measurement data deletion mode may be either deletion of a specific stored measurement data or batch deletion of all stored measurement data. The calibration value deletion mode is a mode in which the calibration value calibrated in the reference position calibration mode and the scale calibration mode is deleted and reset to the factory calibration value.

<Reference position calibration unit and scale calibration unit>
Next, operations of the reference position calibration unit 175 and the scale calibration unit 176 will be described with reference to the flowchart of FIG.

  First, when the power supply button 40 in the soil hardness measurement device 1 is pressed to start up the operation system in the soil hardness measurement device 1, the reference position calibration mode is set (S101). It should be noted that the reference position calibration mode may be set by pressing the mode transition button 42 instead of automatically entering the reference position calibration mode after the operation system has started up.

  When the mode transition button 42 is depressed after the reference position calibration mode is entered, the mode is shifted to the distance scale calibration mode which is the next mode (S102). On the other hand, when the determination button 41 is pressed, the position of the penetration portion 14 at the present time is calibrated to the reference position (S103). In the reference position calibration mode, when the penetration portion 14 is not receiving a load, the base end face of the conical body 141 coincides with the opening surface 224 of the distal end opening of the flange cylindrical portion 220 (FIG. (Refer to (A)), It is preferable that the determination button 41 is pressed. When the calibration is completed, the mode is shifted to the next mode, the scale calibration mode (S104).

  When the mode transition button 42 is pressed after the scale calibration mode is entered, the mode is shifted to the next mode (S105). On the other hand, when the determination button 41 is pressed, the distance between the reference position and the current position of the penetration portion 14 is regarded as a reference maximum displacement amount, and the scale of the distance is calibrated (S106). In the reduced scale calibration mode, when the penetration portion 14 is pushed into the housing 13 and the top portion 141B of the conical body 141 is positioned on the opening surface 224 of the distal end side opening of the flange cylindrical portion 220 (see FIG. 8 (C)), preferably the decision button 41 is pressed.

  When the calibration is completed, the mode is shifted to the next mode (S107). The next mode may be any of the various modes described above. When the next mode in step S107 is completed, the mode is shifted to the measurement mode (S108). In the measurement mode, hardness measurement of the soil is performed.

  In the above, the reference position calibration mode and the scale calibration mode may not be mode transition in this order. Also, the order of mode transition is included in the present invention in all combinations of other modes, reference position calibration mode and scale calibration mode.

<Measurement mode>
Next, with reference to FIG. 2, an operation of measuring the hardness of the soil by the soil hardness measuring device 1 will be described. When the soil hardness measurement device 1 is in the measurement mode, the intrusive portion 14 contacts the soil 700 until the surface 223 of the flange portion 222 of the flange cylindrical portion 220 abuts on the soil 700, as shown in FIGS. It is penetrated.

  Under the present circumstances, while the penetration part 14 receives a load from the soil 700, it receives reaction force from the coil spring 180, and is displaced to the proximal end side of the axial direction of penetration part central axis 14A. The displacement of the penetration portion 14 at the time when the surface 223 of the flange portion 222 abuts on the soil 700 corresponds to the hardness of the soil. What is calculated by the control unit 17 (hardness calculation unit 172) based on this displacement is the hardness of the soil.

Second Embodiment
The soil hardness measurement device 2 according to the second embodiment of the present invention will be described with reference to FIG. Although the soil hardness measuring device 2 is substantially the same as the soil hardness measuring device 1, the difference is in the arrangement mode of each component. In the soil hardness measurement apparatus 2, the same code and name as used in the soil hardness measurement apparatus 1 are used for the same ones as the soil hardness measurement apparatus 1.

  In the soil hardness measurement device 2, as shown in FIG. 14, the display unit 12, the electronic circuit board 100, the displacement amount measurement mechanism 16, the penetration unit 14, and the displacement unit 15 are accommodated in the front end side housing 130. Ru. Further, in the soil hardness measurement device 2, the power supply unit 11 is accommodated in the proximal end case 131.

  In the soil hardness measuring device 2, the display unit 12, the electronic circuit board 100 having the control unit 17, the displacement amount measuring mechanism 16 and the penetration unit 14 (or the displacement unit 15) are disposed along the axial direction of the vertical axis 14C. At this time, as shown in FIG. 14, when viewed from the display unit 12 side (observer 920 side) in the axial direction of the vertical axis 14 C, the display unit 12, the electronic circuit board 100, the displacement amount measuring mechanism 16 and the penetration portion 14 ( Or, the displacement portions 15) overlap each other. In this case, the displacement amount measurement mechanism 16 may be configured to move the sliding body 161 on the sliding surface 163 by magnetic force in conjunction with the displacement of the penetration portion 14.

  The present invention includes all cases where the display unit 12, the electronic circuit board 100, the displacement amount measuring mechanism 16 and the penetration unit 14 (or the displacement unit 15) do not overlap each other, or at least partially overlap each other. Be

  On the other hand, as shown in FIG. 14, the display unit 12, the electronic circuit board 100, the displacement amount measuring mechanism 16 and the penetration part 14 (or the displacement part 15) are viewed from the tip end side in the axial direction of the penetration part central axis 14A. They do not overlap each other.

  In the soil hardness measurement device 2, the grip portion 210 is formed in at least a part or one section of the outer peripheral surface of the proximal end housing 131. In the case of the soil hardness measurement device 2, the housing 13 (tip side casing 130) disposed closer to the tip side (display side 12 side) than the gripping portion 210 as viewed from the tip side in the axial direction of the penetration center axis 14A. Preferably, at least a portion of the outer edge protrudes more than the outer edge of the grip portion 210. Among them, it is particularly preferable that at least the outer edge portion of the housing 13 corresponding to the display portion 12 protrudes more than the outer edge of the grip portion 210.

Third Embodiment
The soil hardness measurement device 3 according to the third embodiment of the present invention will be described with reference to FIG. The soil hardness measurement device 3 is substantially the same as the soil hardness measurement device 2, but the difference is the configuration of the displacement amount measurement mechanism. In the soil hardness measurement apparatus 3, the same code and name as used in the soil hardness measurement apparatus 2 are used for the same ones as the soil hardness measurement apparatus 2.

  In the soil hardness measuring device 3, as shown in FIG. 15, the displacement amount measuring mechanism 16 in the soil hardness measuring device 2 is replaced with a displacement amount measuring mechanism 36. The displacement amount measurement mechanism 36 measures the displacement amount of the penetration part 14 using light.

  The displacement amount measurement mechanism 36 includes, for example, an irradiation unit 37 and a light receiving unit 38. The irradiation unit 37 irradiates the penetration unit 14 with incident light. The light receiving unit 38 receives the reflected light from the penetration unit 14 caused by the incident light emitted from the irradiating unit 37.

  The irradiation unit 37 and the light receiving unit 38 are disposed on the proximal end side of the penetration part 14 in the axial direction of the penetration part central axis 14A. The irradiation part 37 is arrange | positioned in the position which can irradiate incident light to the base end side end surface 14B of the penetration part 14. FIG. In addition, the light receiving unit 38 is disposed at a position where it can receive the reflected light from the penetration unit 14 caused by the incident light emitted from the irradiating unit 37.

  A displacement amount calculation unit (not shown) mounted on the surface side of the electronic circuit board 100 calculates the displacement amount of the penetration portion 14 based on the reflected light received by the light receiving unit 38. A hardness calculation unit (not shown) mounted on the surface side of the electronic circuit board 100 calculates the hardness of the soil based on the calculated displacement amount.

  The soil hardness measuring device of the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the scope of the present invention.

1, 2, 3 Soil hardness measurement device 10 Hardness measurement unit 11 Power supply unit 12 Display unit 13 Case 14 Penetration part 14A Penetration part central axis 14B Base end side end face 14C Vertical axis 15 Displacement part 16, 36 Displacement amount measurement mechanism 17 Control unit 18 urging unit 19 linear motion guide unit 20 base end side movement limiting unit 37 irradiation unit 38 light receiving unit 40 power button 41 determination button 42 mode transition button 100 electronic circuit board 110 battery 110B, 110C electrode forming surface 111 battery holding unit 112A, 112B terminal 113 battery holder connection mechanism 114 USB terminal holder 114A insertion opening 115 battery peripheral surface contact wall 115A battery contact surface 116A, 116B electrode facing peripheral wall 116C, 116D battery peripheral face facing peripheral wall 116E battery cover 117 battery housing Space 118 Connection Frame 119 Connection Frame Connection Mechanism DESCRIPTION OF SYMBOLS 30 tip side case 131 base end side case 131A opening 131C display part visual recognition opening 132 1st accommodating part 132A display part accommodating space 133 2nd accommodating part 133A electronic circuit board accommodating space 134 3rd accommodating part 134A displacement amount measurement mechanism accommodation Space 134C Fixed body accommodation space 134D Linear movable space 135 Fourth accommodation part 135A Power supply section accommodation space 141 Conical body 141A Central axis 141B Top part 141C base end side end face 142 Base end part 160 Moving body 161 Sliding body 162 Fixed body 163 Sliding body Dynamic surface 171 Displacement amount calculation unit 172 Hardness calculation unit 173 Data storage unit 174 Data erasure unit 175 Reference position calibration unit 176 Scale calibration unit 177 Error detection unit 178 Data transmission unit 180 Coil spring 190 First cylindrical portion 191 First cylindrical body 191C Plate Thin part 192 Penetration part side engagement mechanism 19 2A Stepped surface 193 Displacement amount measurement mechanism side connection mechanism 195 2nd cylinder part 196 2nd cylinder 196A Tip side opening 197 Base end side case connection mechanism 198, 210 Grasping part 199 Grip member 200 Stopper part 201 Stopper part connection mechanism 202 urging portion side engagement mechanism 203 first pillar 203A abutting outer peripheral surface 203B non-abutting outer peripheral surface 204 second pillar 204A pillar outer peripheral surface 205 passage 220 flange cylinder portion 221 cylindrical portion 222 flange portion 224 opening surface

Claims (20)

A hardness measurement unit that measures the hardness of the soil;
A battery holding unit configured to be able to hold a battery that supplies power to the hardness measurement unit;
A display unit on which the measurement result of at least the hardness measurement unit is displayed;
Equipped with
The hardness measurement unit
A penetration that penetrates into the soil along the axial direction of its own central axis;
A displacement portion which gives displacement to the penetration portion in accordance with a load received from soil along an axial direction of the central axis;
A displacement amount measurement mechanism that measures a displacement amount of the penetration portion from a reference position;
A controller that controls the measurement of soil hardness;
Have
The penetration portion, the displacement portion, and the battery holding portion are arranged in order along an axial direction of the central axis ,
The control unit may include a reference position calibration unit that calibrates the current position of the penetration unit to the reference position.
Soil hardness measuring device. The battery holding portion has a battery housing space in which the battery is housed,
The battery holder may be disposed such that a longitudinal direction of the battery housing space is parallel to the central axis.
The soil hardness measuring device according to claim 1. The battery holding portion has a battery contact surface to which at least a part of a circumferential surface of the battery is abutted when the battery is accommodated in the battery accommodation space.
The battery contact surface is extended corresponding to the longitudinal direction of the battery,
The battery holder may be disposed such that a longitudinal direction of the battery contact surface is parallel to the central axis.
The soil hardness measuring device according to claim 2. The hardness measurement unit has a displacement amount measurement mechanism that measures a displacement amount of the penetration portion from a reference position,
The overlapping portion of the displacement measuring mechanism and the battery holding portion when viewed from the direction perpendicular to the central axis is disposed so as not to overlap with the battery holding portion when viewed from the axial direction of the central axis. Feature
The soil hardness measuring device according to any one of claims 1 to 3. The displacement amount measuring mechanism is arranged to be shifted in a direction perpendicular to the central axis with respect to the battery holding portion.
The soil hardness measuring device according to claim 4. The battery holding unit, the displacement amount measuring mechanism, and the display unit are arranged in order along a direction perpendicular to the central axis.
The soil hardness measuring device according to claim 4 or 5. The battery holder has a removable battery lid,
The battery cover is provided on the opposite side to the display unit.
The soil hardness measuring device according to claim 6. The displacement portion is
An urging unit which slides the penetration portion while applying a reaction force corresponding to a load received from the soil to the penetration portion;
A proximal end movement restricting portion which is disposed inside the cylindrical casing and restricts the movement of the biasing portion to the proximal end side in the axial direction of the central axis with respect to itself;
Have
The proximal movement limiting unit is
Abutment outer peripheral surface which comes in contact with the inner peripheral surface of the case among the outer peripheral surfaces of itself,
A non-contacting outer peripheral surface not in contact with the inner peripheral surface of the housing;
Have
A passage extending parallel to the central axis is formed between the non-contacting outer peripheral surface and the inner peripheral surface of the housing,
The displacement amount measurement mechanism is disposed to pass through the passage.
The soil hardness measuring device according to any one of claims 4 to 7. The battery holding portion is fixed by being connected to at least the proximal end movement restricting portion,
The soil hardness measuring device according to claim 8. The hardness measurement unit has a displacement amount measurement mechanism that measures a displacement amount of the penetration portion from a reference position,
The displacement portion and the displacement amount measurement mechanism are disposed along a direction perpendicular to the central axis.
The soil hardness measuring device according to any one of claims 1 to 3. The displacement portion, the displacement amount measuring mechanism, and the display portion are sequentially disposed along a direction perpendicular to the central axis.
The soil hardness measuring device according to claim 10. When viewed in the axial direction of the central axis, at least a part of the displacement amount measurement mechanism is disposed so as to overlap the displacement portion.
The soil hardness measuring device according to claim 4 or 10. The displacement amount measuring mechanism
A movable body configured to be movable in parallel to the central axis in conjunction with the displacement of the penetration portion;
A sliding body fixed to the moving body;
A stationary body having a sliding surface on which the sliding body slides, and performing an output according to the position of the sliding body on the sliding surface;
Equipped with
The said hardness measurement part has a control part which controls the measurement of the hardness of soil,
The control unit has a displacement amount calculation unit that calculates the displacement amount of the penetration portion based on the position of the sliding body on the sliding surface,
The sliding surface is arranged to extend in parallel with the central axis on the central axis side with respect to the display unit.
The soil hardness measuring device according to any one of claims 4 to 12. The hardness measurement unit includes an electronic circuit board on which a control unit that controls measurement of soil hardness is mounted on the surface side.
The fixed body is fixed to the back surface of the electronic circuit board,
The soil hardness measuring device according to claim 13. The penetration portion and the display portion are arranged in order along the axial direction of the central axis,
It has a penetration part side case provided on the penetration part side with respect to the display part,
A grip portion is formed on an outer peripheral surface of the penetration portion side housing,
The soil hardness measuring device in any one of Claims 1-14. The penetration portion, the display portion, and the battery holding portion are arranged in order along the axial direction of the central axis,
A battery holder side case provided closer to the battery holder than the display unit;
A grip portion is formed on an outer peripheral surface of the battery holding portion side housing,
The soil hardness measuring device in any one of Claims 1-14. When viewed from the axial direction of the central axis, at least a part of the outer edge on the display unit side protrudes in a direction perpendicular to the central axis more than the outer edge of the grip portion.
The soil hardness measuring device according to claim 15 or 16. The hardness measurement unit has a displacement amount measurement mechanism that measures a displacement amount of the penetration portion from a reference position,
The displacement amount measuring mechanism
An irradiation unit that irradiates incident light to the penetration portion;
A light receiving unit configured to receive light reflected from the penetration portion caused by the incident light;
Equipped with
The said hardness measurement part has a control part which controls the measurement of the hardness of soil,
The control unit includes a displacement amount calculation unit that calculates a displacement amount of the penetration portion based on the reflected light received by the light receiving unit.
The soil hardness measuring device according to any one of claims 1 to 3. The maximum displacement amount of the penetration part set in advance is defined as a reference maximum displacement amount,
The control unit has a scale calibration unit that calibrates the scale of the distance by regarding the distance between the current position of the penetration unit and the reference position as a reference maximum displacement amount,
The soil hardness measuring device according to claim 1 . The control unit may include an error detection unit that detects an error when the distance is smaller than a predetermined threshold.
The soil hardness measuring device according to claim 19 .

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