JPH0593620A - Position coordinate measuring device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a device that reads the latitude and longitude of an arbitrary point P on the map smaller than the map and at a low cost. [Structure] Thread 6 whose both ends are wound by reels 3L and 3R
The pointer PT is attached to the central portion of the, and the position coordinate of the pointer PT is calculated from the moving amount of the thread 6. The latitude and longitude of the reference points P1 and P2 on the map are input, and the coordinates of the arbitrary point P are converted into latitude and longitude based on the inputs. The measured latitude and longitude are displayed and output to the outside via the interface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position coordinate measuring device capable of measuring the latitude and longitude of an arbitrary point on a map, for example, for inputting position coordinates of a destination or the like in an automobile navigation device. Available for.

[0002]

2. Description of the Related Art For example, it has been proposed that an automobile navigation system has a function of instructing a distance to a destination and a direction of the destination. It is necessary to input position coordinates such as. With a device having an electronic map display function capable of displaying a map on a two-dimensional display surface such as a cathode ray tube, a destination point can be designated on the displayed map and the coordinates of the point can be automatically calculated. Therefore, the position of the destination can be easily input. However, if the electronic map display function is provided, the system is inevitably expensive, and even in such a device, the display area of the map is small, so the input operation is relatively troublesome.

Therefore, it is conceivable to obtain the latitude and longitude of the destination from a commercially available map book and input the numerical information using a numeric keypad or the like. However, in general maps, the scales of latitude and longitude are not written at fine intervals, so in order to obtain the latitude and longitude of any point on the map, a reading plate with a fine mesh on a transparent plate is used as a scale. It is necessary to read the scale on the map and read the scale to calculate the latitude and longitude of the destination by human calculation, which is a very troublesome operation.

For example, Japanese Patent Laid-Open No. 59-2200 discloses that a transparent digitizer is placed on a map to input a position on a planned running course. However, this type of digitizer is very large, expensive, and difficult to carry and handle.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention makes it possible to measure the coordinates of an arbitrary position by a simple operation using a general map, and to make the measuring device small and inexpensive. This is an issue.

[0006]

In order to solve the above problems, in the present invention, a measuring thread means formed in a thread shape or a belt shape; a position indicating means provided near the center of the measuring thread means; First winding means for winding one end of the yarn means; second winding means for winding the other end of the measuring yarn means; first measuring means for the position indicating means on the path, A yarn guide means for guiding each position of the first reference point on the winding means side and the second reference point on the second winding means side with respect to the position indicating means; the first winding means, the second winding means Reference position fixing means for fixing the take-up means and the yarn guiding means to a position in a state along the reference line of the plane to be measured; the amount of movement of the measuring yarn means on the first winding means side with respect to the position indicating means. Movement detecting means for outputting a signal corresponding to the position of the measuring thread means Second movement detecting means for outputting a signal corresponding to the movement amount on the second winding means side to the indicating means; and based on signals output by the first movement detecting means and the second movement detecting means. Position calculation means for calculating the coordinates of the position indicated by the position indication means and outputting the result.

According to a second aspect of the invention, the first movement detecting means outputs a signal according to the amount of rotation of the reel of the first winding means, and the second movement detecting means , The second
A signal according to the amount of rotation of the reel of the winding means, and in the third invention, the first winding means and the second winding means are connected to the reel and the reel. In the fourth invention, each of the reference position fixing means comprises a spiral spring.
An inner space into which a part of the sheet-like object is inserted and a clip mechanism for sandwiching and fixing the sheet-like object in the inner space are provided.

[0008]

The position of the position indicating means can be freely moved, and the movement of the position indicating means causes the measuring thread means to move while being pulled or wound. Further, the measuring yarn means is guided by the yarn guiding means so as to always pass through the first reference point and the second reference point. Therefore, the first reference point is A and the second reference point is
Assuming that the reference point is B and the position of the position indicating means is P, a triangle A-B-P is formed as shown in FIG. In this triangle A-B-P, the distance of the base A-B is constant, and when the position of the point P changes, the lengths of the hypotenuses A-P and BP and the angles of the respective parts change. X in the direction of base AB
Axis, the direction perpendicular to it is the Y-axis, the length of the base AB is L0, the length of the hypotenuse AP is L1, the length of the hypotenuse BP is L
2 and the angle between the side A-P and the side A-B is θ,
The coordinates (x, y) of the point P in the X, Y coordinate system are obtained as follows.

[0009]

[Equation 1] Cos θ = (L1 ² + L0 ² −L2 ² ) / 2 · L1 · L0 (from cosine theorem) (1) Sin θ = (1-Cos θ) square root (2) x = L1 · Cos θ (3) y = L1 · Sin θ (4) The lengths of the line segments L1 and L2 can be obtained based on the moving amounts of the measuring yarn means detected by the first and second movement detecting means, respectively. On the other hand, for example, as shown in FIG. 1, if the base AB is oriented in a direction coinciding with the east-west axis on the map, two points at diagonal ends of a predetermined rectangular area on the map are set to P1. And P2, and the coordinates of P1 (x1, y
1) and longitude, latitude (EW1, NS1) and coordinates (x2, y2) of P2 and longitude, latitude (EW2, NS2) are given, the longitude E of an arbitrary point P on the rectangular area is given.
W and latitude NS are approximately calculated as follows.

[0010]

EW = EW1 + (EW2-EW1) (x-x1) / (x2-x1) (5) NS = NS1 + (NS2-NS1) (y-y1) / (y2-y1) (6) Accurate To obtain latitude and longitude, triangle AB-
It is important to correctly orient the base AB of P in the east-west direction of the map. Further, when the scale of the map is known, if there is information on one of the points P1 and P2, an arbitrary point P
The latitude and longitude of can be calculated. The obtained latitude and longitude information may simply be displayed visually as numerical values, or the information may be automatically transferred to a system that requires it (for example, a navigation device of an automobile). Note that the sheet-like object to be measured by this device is not limited to a map, and this device can be used to read the coordinates of an arbitrary point with respect to various two-dimensional coordinate systems.

[0011]

EXAMPLE FIG. 1 shows an external view of a position coordinate measuring apparatus 1 according to an example in use, together with a map MAP of a measurement target. Referring to FIG. 1, the map MAP is sandwiched between measuring devices 1 configured in a clip shape so that they do not move relative to each other. On the upper surface of the measuring device 1, a measurement switch S0, a first reference point switch S1, a second reference point switch S2, an up switch UP, a down switch DOWN,
And a liquid crystal display LCD. Liquid crystal display L
Character information such as latitude and longitude is displayed on the CD in two lines. The measuring device 1 is provided with a frame-shaped pointer PT for pointing a point. The pointer PT is
As shown in FIG. 1, it can be pulled out from the main body of the measuring device 1 and positioned at an arbitrary point on the map MAP. The pointer PT and the body of the measuring device 1 are always connected by a thread 6. The thread 6 is fixed to the pointer PT. When the pointer PT moves away from the measuring apparatus 1, the thread 6 is pulled out from the measuring apparatus 1, and when the pointer PT approaches the measuring apparatus 1, the thread 6 is pulled into the measuring apparatus 1. A concave portion HP for mounting the pointer PT is formed in the central portion on the upper side of the measuring device 1, and the portion is in the home position.

FIG. 3 schematically shows the internal mechanism of the measuring apparatus 1. Referring to FIG. 3, inside the measuring apparatus 1, reels 3L and 3R for winding the yarn 6 are arranged on the left side and the right side, respectively. These reels 3L and 3R are
Each of them is rotatably supported and is connected to one end of each of spiral springs 4 and 5 arranged in the center thereof. The other ends of the spiral springs 4 and 5 are fixed to the frame of the measuring apparatus 1, respectively. The spiral spring 4 is
Force is always applied in the direction of rotating the reel 3L counterclockwise and in the direction of rotating the reel 3R clockwise, respectively. Therefore, the thread 6 is wound around the reels 3L and 3R and constantly receives a force in a direction to bring the pointer PT closer to the measuring device 1. Since the force of the spiral springs 4 and 5 is not so strong, the thread 6 can be pulled out by the force of a person. However, if the force is loosened, the thread 6 can be pulled out.
Pulled back by. When the pointer PT is at the home position HP, the pointer PT fits in the concave portion and the pointer P
T is stably positioned at that position. The yarn 6 is positioned so that it is guided by the guide frames 2a, 2b and 2c and always passes through the positions of the points A and B.

Gears 3a are formed on the outer peripheral portions of the reels 3L and 3R. Gear 3a of reel 3L is gear 7
The gear 7 meshes with the gear 8a. The gear 8a has a disk 8b coaxially coupled to it.
When the reel 3L rotates, the disc 8b rotates via the gear 7 and the gear 8a. Similarly, the gear 3a of the reel 3R meshes with the gear 10, and the gear 10 meshes with the gear 11a. Gear 11
The disk 11b is integrally formed with the disk 11b coaxially coupled to the disk a, and when the reel 3R rotates, the disk 11b rotates via the gear 10 and the gear 11a.

A large number of slits are formed in the peripheral portions of the disks 8b and 11b at regular intervals, and the rotation sensor 9L is provided at a position facing the slits.
And 9R are arranged. Therefore, the rotation sensor 9L can detect the rotation amount of the reel 3L, and the rotation sensor 9R can detect the rotation amount of the reel 3R. Actually, as shown in FIG. 6, the rotation sensor 9L includes two transmissive optical sensors 9a and 9b therein, and those pulse signals output from them have a phase difference of 90 degrees from each other. The distance and the distance between the slits 8c are set. Two
The two pulse signals have a phase difference of 90 degrees with each other, but the relationship between the advance and the delay of the two changes depending on the rotation direction of the disk 8b. Therefore, the rotation direction of the disk 8b can be known from the relationship between the phase lead and the phase delay. In the case of FIG. 6, when the rotation direction signal is observed at the rising timing of the rotation pulse signal, it is at a high level H during normal rotation and at a low level L during reverse rotation. The same applies to the rotation sensor 9R and the disk 11b.

FIG. 4 shows an enlarged view of the measuring apparatus 1 viewed from the side. Referring to FIG. 4, the frame of the measuring device 1 is
The mu is constructed by combining the lower member 12 and the upper member 13,
Both of them are rotatably engaged at the shaft 15.
In addition, a coiled spring 1 is provided on the shaft 15.
6, the lower member 12 receives the force in the arrow A2 direction and the upper member 13 receives the force in the arrow A1 direction by the spring 16 to close the opening at the tip. If the base 12e of the lower member and the base 13e of the upper member are sandwiched and pressed from above and below by the force of a person, the front end of the frame (see FIG.
The left edge of can be opened. A sheet-like map M between the lower member 12 and the upper member 13 with the portion opened.
AP can be inserted and pinched. Tip 13 of upper member
A power switch PS is arranged near a, with its push button facing downward. The lower member 12 facing the push button is formed with a hole 12b into which the push button can be inserted. When the map MAP does not exist between the lower member 12 and the upper member 13, the push buttons enter the holes 12b. Therefore, even when the openings are closed, the push buttons are not pushed and the power switch PS remains off. However, when the map MAP is inserted between the lower member 12 and the upper member 13 and sandwiched between them, the push button cannot enter the hole 12b and is pressed by the map MAP, so the power switch PS is in the ON state. become. Tip 12 of lower member 12
A sheet-shaped rubber 14 is attached to a to prevent the map MAP from slipping.

FIG. 5 shows the configuration of the electric circuit of the measuring apparatus 1. The measuring device 1 is controlled by a microcomputer CPU. The microcomputer CPU includes a liquid crystal display LCD, an interface IFC, rotation sensors 9L and 9R, and switches S0, S1, S2, UP and D.
OWN is connected. The battery-BT is connected to the microcomputer CPU via the power switch PS. The rotation pulse signals output from the rotation sensors 9L and 9R are interrupt terminals I of the microcomputer CPU.
Applied to RQ0 and IRQ1 respectively, the rotation sensor 9
The rotation direction signals of L and 9R are ports P0 and P, respectively.
Applied to 1. Switches S0, S1, S2, UP and DOWN are connected to ports P2, P3, P4, P5 and P6, respectively. The external connector J connected to the interface IFC is connected to, for example, a navigation system of an automobile. This measuring device 1 can be used for inputting coordinates (latitude, longitude) of a destination or the like.

The contents of processing of the microcomputer CPU of FIG. 5 are shown in FIGS. 7 and 8. The operation of the CPU will be described below with reference to FIGS. 7 and 8. When the power is turned on, initialization is executed in step 11. That is, the output port is reset, the internal memory is cleared, the mode (interrupt, timer, etc.) is initialized, and the display is cleared. Various flags and numerical states described later are also initialized at this time. Also, interrupt requests from the terminals IRQ0 and IRQ1 are permitted. When either the input level of IRQ0 or IRQ1 rises after this permission, the "interrupt processing" shown in FIG. 8 is executed each time.

When step 11 is completed, the state of each switch is checked, and the process according to the state is executed. First, in step 12, the state of the switch S1 is checked. When the state change of the switch S1 from off to on is detected, the process proceeds to step 13. In step 13, the P1 mode flag is checked. This flag is off in the initial state. Therefore, when the switch S1 is first pressed, the process proceeds to step 14. In step 14, the P1 mode flag is turned on, the P2 mode flag is turned off, the input value is cleared, and the flag FNE is cleared. The input value is a numerical value indicating latitude and longitude and is displayed on the liquid crystal display LCD. When switch S1 is pressed after the second time, P1 mode
Since the flag is on, the routine proceeds to step 15 and the state of the flag FNE is reversed. The flag FNE is a flag for selecting which of latitude and longitude of the input value is to be adjusted. That is, every time the switch S1 is pressed, the latitude and longitude adjustment modes can be alternately switched.

In step 16, the state of the switch S2 is checked. When the state change of the switch S2 from OFF to ON is detected, the process proceeds to step 17. In step 17, the P2 mode flag is checked. This flag is off in the initial state. Therefore, when the switch S2 is first pressed, the process proceeds to step 18. In step 18, P
2 mode flag is turned on, P1 mode flag is turned off,
The input value is cleared and the flag FNE is cleared. The input value is a numerical value indicating latitude and longitude and is displayed on the liquid crystal display LCD. When the switch S2 is pressed after the second time,
Since the P2 mode flag is on, the routine proceeds to step 19, where the state of the flag FNE is reversed. The flag FNE is
This is a flag for selecting which of latitude and longitude of the input value is to be adjusted. That is, every time the switch S2 is pressed, the latitude and longitude adjustment modes can be alternately switched.

In step 20, the state of the switch S0 is checked. When the state change of the switch S0 from OFF to ON is detected, the process proceeds to step 21. At this time, if the P1 mode flag is on, the routine proceeds to step 23, and if the P2 mode flag is on, the routine proceeds through step 22 to step 24. In step 23, the input value is stored in the first point register Dp1, the P1 set flag is turned on, and P
Turn off the 1-mode flag. In step 24, the input value is stored in the second point register Dp2, the P2 set flag is turned on, and the P2 mode flag is turned off.

In step 25, the state of the switch UP is checked. When a change in the state of the switch UP from OFF to ON is detected, and at every predetermined time after the lapse of a predetermined time after being turned on, the routine proceeds to step 26. At this time P
If either the 1-mode flag or the P2-mode flag is ON, the routine proceeds to step 28. In step 28, the input value held in the predetermined register is updated. Actually, the state of the flag FNE is checked, and if FNE is 0, the latitude is incremented, and if FNE is 1, the longitude value is incremented by +1.

In step 29, the state of the switch DOWN is checked. When the change of the switch DOWN from the OFF state to the ON state is detected, and after the lapse of a predetermined time after being turned on, the process proceeds to step 30. At this time, if either the P1 mode flag or the P2 mode flag is ON, the process proceeds to step 32. In step 32, the input value held in the predetermined register is updated.
Actually, the state of the flag FNE is checked, and if FNE is 0, the latitude is obtained. If FNE is 1, the longitude value is obtained by -1.
To do.

If at least one of the P1 set flag and the P2 set flag is OFF, steps 33 or 34 are executed.
To step 37. In step 37, the input value information held in the register is displayed on the liquid crystal display LCD as it is. If both the P1 set flag and the P2 set flag are on, that is, if both the P1 coordinate and the P2 coordinate have been set, step 35 is followed by step 35.
Proceed to. In step 35, the latitude and longitude of the coordinates indicated by the current pointer PT are calculated based on the P1 coordinates and P2 coordinates input in advance. Next step 36
Then, the result of the calculation, that is, the latitude and longitude of the position of the pointer PT is displayed on the liquid crystal display LCD. In the following step 38, a predetermined communication process is executed, and the latitude and longitude information is output to the external device connected to the interface IFC via the connector J.

Next, the interrupt processing will be described. Rotation sensor 9L
When the rising edge of the rotation pulse signal from the signal IRQ0 is detected at the terminal IRQ0 or the rising edge of the rotation pulse signal from the rotation sensor 9R is detected at the terminal IRQ1, the routine proceeds to step 41. In step 41, the terminal (interrupt port) I
Identify which of RQ0 and IRQ1 detected the rising edge of the rotation pulse signal. In the next step 42,
The level of the rotation direction signal from the rotation sensor 9L or 9R is detected, and the direction of rotation of the disk, that is, the direction of movement of the thread is identified depending on whether it is the high level H or the low level L. When an interrupt is generated by the signal from the terminal IRQ0, the rotation direction signal of the rotation sensor 9L is referred to, and when an interrupt is generated by the signal from the terminal IRQ1, the rotation sensor 9R is detected.
Refer to the rotation direction signal of. When the rotation direction is the forward rotation direction, the content of the counter CN1 or CN2 is updated by +1. When the rotation direction is the reverse rotation direction, the content of the counter CN1 or CN2 is updated by -1. When an interrupt is generated by the signal from the terminal IRQ0, the contents of the counter CN1 are updated, and when an interrupt is generated by the signal from the terminal IRQ1, the contents of the counter CN2 are updated.

The contents of the counters CN1 and CN2 are cleared to 0 by the initialization of step 11 when the pointer PT is located at the home position HP. Therefore,
The counter CN1 holds as a numerical value the relative length of the portion on the left side of the pointer PT of the thread 6 with respect to the state where PT is at the home position HP, and the counter CN2 holds the pointer of the thread 6 at the counter CN2. The relative length pulled out with respect to the state where PT is at the home position HP in the portion on the right side of PT is held as a numerical value.
When the pointer PT is moved, the counter CN1 is correspondingly moved.
And the value of CN2 changes.

Since the thread 6 is guided by the guide frames 2a, 2b and 2c and always passes through the points A and B, the position P of the pointer PT and the triangle formed by the points A and B (see FIG. 2).
(See), the length L0 of the line segment AB is constant,
The length of the line segment P-A and the length of the line segment P-B change as the pointer P moves. Also, in this embodiment,
Since the home position HP is located between the points A and B, when the pointer PT is at the home position HP, the length of the line segment P-A and the length of the line segment P-B are both L
It is 0/2. Therefore, the movement amount of the yarn 6 per pulse of the rotation pulse signals output from the rotation sensors 9L and 9R is Δ.
If the value of the counter CN1 is N1 and the value of the counter CN2 is N2 when the pointer PT is positioned at an arbitrary position, the length L1 of the line segment PA is L1 = N1.
ΔL + L0 / 2, the length L2 of the line segment P-B is L2 = N2
-It is represented by ΔL + L0 / 2.

As is clear from the above equations (1) to (6), if the lengths L0, L1 and L2 of the three sides of the triangle A-B-P are known, it is based on that. The position (x, y) of the point P in the XY coordinate system can be obtained by
When the XY coordinate system and the latitude / longitude coordinate system have a correspondence relationship, the latitude and longitude of the point P can be obtained. In this embodiment, as shown in FIG.
By sandwiching and fixing, the direction of line segment A-B, that is, the X axis matches the lateral direction of the map, that is, the east-west direction, so the XY coordinate system and the latitude / longitude coordinate system have a substantially corresponding relationship. become.

Actually, since the power switch PS is turned on and the process is initialized when the map MAP is sandwiched in the measuring device 1, in that state, first, the two reference points P1 of the map MAP are set.
And the coordinates of P2 need to be set. As described above, pressing switch S1 brings you to P1 mode.
Set to mode. In the P1 mode, the latitude and longitude input values are displayed on the liquid crystal display LCD, so the switches UP and DOWN are operated to adjust the displayed input values, which are then adjusted to the reference point P1 on the map. Match the latitude and longitude. By operating the switch S1, it is possible to switch which of latitude and longitude is to be adjusted. When the displayed latitude and longitude match the latitude and longitude of the point P1 on the map, move the pointer PT by hand to position it at the position P1 on the map.
Press switch S0. As a result, the latitude and longitude of the reference point P1 are set. Similarly, when the switch S2 is pressed, the P2 mode is set, so the P2 mode is set next. P2
In the mode, since the input values of latitude and longitude are displayed on the liquid crystal display LCD, the switches UP and DOWN are operated to adjust the displayed input values, which are then adjusted to the latitude of the reference point P2 on the map. ， Match the longitude. By operating the switch S2, it is possible to switch which of latitude and longitude is to be adjusted. When the displayed latitude and longitude match the latitude and longitude of the point P2 on the map, move the pointer PT by hand to position it at the position P2 on the map and press the switch S0. As a result, the latitude and longitude of the reference point P2 are set. This completes the setting of the reference points P1 and P2, so step 35 of FIG. 8 is executed and the pointer PT
The latitude and longitude of any position on the map indicated by are calculated and the information is displayed in step 36.

That is, the EW in the above equations (5) and (6)
1, NS1, x1 and y1 are set when in P1 mode, and EW2, NS2, x2 and y2 are set when in P2 mode. Therefore, in step 35, equations (5) and (6) are used. Based on the coordinates (x, y) indicated by the pointer PT at that time
Then, the latitude NS and the longitude EW of the coordinates are calculated and obtained.

In this measuring device 1, it is important that the yarn 6 to be used has a small amount of expansion and contraction and is thin, and that the axes AB of the measuring device 1 are accurately aligned in the east-west direction on the map. Is.

In the above embodiment, the coordinate of the arbitrary point P is obtained from the two reference points P1 and P2 on the map. However, the coordinate of the point P is calculated based on one reference point and the scale of the map. It is also possible to ask. Further, in the above-described embodiment, the yarn 6 is determined by the amount of rotation of the reels 3L and 3R that winds the yarn 6.
The amount of movement of the thread 6 is detected.
The roller is arranged so as to abut on the yarn, the amount of movement of the yarn 6 is detected from the amount of rotation of the roller, and an optical or magnetic mark is added to the yarn 6 to make the mark. Even if the movement of the yarn 6 is detected, the movement amount of the yarn 6 can be detected. Also, the thread 6
It is also possible to use a strip-shaped (for example, tape-shaped) one instead of.

[0032]

As described above, according to the present invention, the coordinates of an arbitrary position can be measured by a simple operation using a general map, and the measuring device can be made much smaller than the map. It is also convenient for vehicles.

In the second aspect of the invention, the first movement detecting means (9L) outputs a signal according to the amount of rotation of the reel (3L) of the first winding means to detect the second movement. Since the means (9R) is configured to output a signal according to the rotation amount of the reel (3R) of the second winding means, the configuration can be simplified and the device can be made inexpensive.

Further, in the third aspect of the invention, since the reel and the spiral spring connected to the reel are respectively provided in the first winding means and the second winding means, the winding structure is simplified. The device can be inexpensive.

Further, in the fourth aspect of the invention, the reference position fixing means (12, 13) is fixed by sandwiching the inner space into which a part of the sheet-like object is inserted and the sheet-like object in the inner space. Since it has a clipping mechanism, the reference axis (A-B axis) of the measuring device
Can be easily matched with the reference axis (east-west direction) of the map.
Therefore, the operability is improved.

[Brief description of drawings]

FIG. 1 is a map MAP showing the usage state of the measuring apparatus 1 of the embodiment.
It is a perspective view shown with.

FIG. 2 is a plan view showing an XY coordinate system of the measuring device 1.

FIG. 3 is a plan view showing the main internal structure of the measuring apparatus 1.

FIG. 4 is a side view showing an enlarged side surface of the measuring device 1.

5 is a block diagram showing an electric circuit of the measuring device 1. FIG.

FIG. 6 is a time chart showing the relationship between the signal output by the rotation sensor 9L and the rotation direction.

FIG. 7 is a flowchart showing a part of the operation of the CPU of FIG.

FIG. 8 is a flowchart showing a part of the operation of the CPU of FIG.

[Explanation of symbols]

1: Measuring device 2a, 2b, 2c: Guide frame 3L,
3R: reel 3a, 7, 8a, 10, 11a: gear 4,
5: Spiral spring 6: Thread 8b: Disc 9L,
9R: Rotation sensor 12: Lower member 13: Upper member 14:
Rubber 15: Shaft 16: Spring CPU: Microcomputer IFC: Interface
Face PS: Power switch PT: Pointer HP: Home position LCD: Liquid crystal display S0, S1, S2, UP, DOWN: Switch MAP: Map

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Kondo 2-1-1 Asahi-cho, Kariya city, Aichi Aisin Seiki Co., Ltd.

Claims (4)

[Claims] 1. A measuring thread means formed in a thread shape or a band shape; a position indicating means provided near the center of the measuring thread means; a first winding means for winding one end of the measuring thread means;
Second winding means for winding the other end of the measuring thread means; the measuring thread means, the first reference point on the side of the first winding means with respect to the position indicating means, and the position indicating means. With respect to the second winding means, the yarn guiding means for guiding the respective positions of the second reference point; the first winding means, the second winding means, and the yarn guiding means, along the reference line of the plane to be measured. A reference position fixing means for fixing the position of the measuring thread means to the position indicating means, and a first movement detecting means for outputting a signal according to the movement amount of the measuring yarn means on the side of the first winding means; Second movement detecting means for outputting a signal according to the movement amount of the measuring yarn means to the position indicating means on the side of the second winding means; and the first movement detecting means and the second movement detecting. Based on the signal output by the means, the coordinates of the position pointed by the position pointing means are calculated and the result is And outputs the position calculating means; position coordinate measuring device comprising a. 2. The first movement detecting means outputs a signal according to a rotation amount of a reel of the first winding means, and the second movement detecting means outputs the second winding. The position coordinate measuring device according to claim 1, which outputs a signal according to the amount of rotation of the reel of the picking means. 3. The position coordinate measuring device according to claim 1, wherein the first winding means and the second winding means each include a reel and a spiral spring connected thereto. 4. The reference position fixing means comprises an inner space into which a part of the sheet-like object is inserted and a clip mechanism for sandwiching and fixing the sheet-like object in the inner space.
The position coordinate measuring device described.