JPH07152988A - Measuring instrument and attaching method therefor - Google Patents

Abstract

PURPOSE:To detect and correct an optimum position for attachment so that the respective parts constituting the measuring instrument are held at proper fitting positions at all times. CONSTITUTION:An electromagnetic induction signal which is radiated from a transmission-side electromagnetic induction coil through magnetic flux and indicates the rotation of a wheel of a bicycle is detected as variation of a magnetic field at the periphery of a reception-side electromagnetic induction coil 26 and received by resonance with a tuning capacitor 41. This received signal is amplified by a detecting circuit 42 and outputted to a pulse processing circuit 43, and extracted as pulses, and the crest value T of the received signal waveform is outputted to a CPU 44. The CPU 44 performs an arithmetic process for the travel state of the bicycle on the basis of pulses of the received signal and displays it at a display part. Further, the crest value T detected by the CPU 44 becomes less than a specific value, it is evident that the transmission- side and reception-side electromagnetic induction coils shift in position, so the positions of the electromagnetic induction coils are changed and the positions for the attachment are corrected so that the detected crest value reaches the highest crest value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring device whose position can be adjusted so that the motion state of a moving body can be appropriately measured, and a mounting method thereof.

[0002]

2. Description of the Related Art Conventionally, for example, bicycles, cars, trains and the like are examples of moving bodies that rotate on wheels and move on roads or rails. As a device for detecting the motion state of the moving body, a running state detection device (particularly called a cycle computer in the case of a bicycle) is known.

For example, in the case of the above-mentioned cycle computer, a magnet is attached to the spoke portion of the front wheel as a rotation detecting portion for detecting the rotation of the bicycle wheel, and the magnet rotates on the fork leg outside the rotation track of the magnet. The magnetic detection part for detecting is fixed. For example, a reed switch or the like is used for the magnetic detection unit, which is normally in the off state, and is turned on each time the magnet passes near the reed switch as the wheel rotates, so that the wheel is One rotation of the wheel can be detected by outputting one magnetic detection signal (reed switch signal) every rotation. In this way, the magnetic detection signal detected by the above magnetic detection unit is converted into a predetermined transmission pulse signal and wirelessly transmitted from the transmitter, and this is received by the receiver provided in the operation display unit of the cycle computer. Then, the arithmetic processing of the traveling state is performed.

The above-mentioned cycle computer calculates a running state such as a running distance and a running speed of a bicycle by multiplying the detected number of rotations of the wheel by a circumference of the wheel stored in advance in a RAM or the like in the CPU. Then, this is displayed on a display unit such as a liquid crystal display (LCD).

Conventionally, the positioning of each part (magnet, magnetic detection part, operation display part) in the above-mentioned measuring device is carried out at a substantially proper position by utilizing the intuition of a person who mounts the measuring device or a groove for positioning. It is designed to be attached. However, it is difficult to always keep each part of the measuring device at the optimum position only by the above means, and if the mounting position of each part shifts due to vibration etc. while traveling, the magnetic detection signal cannot be detected or the magnetic field transmitted by wireless is detected. In some cases, the detection signal could not be reliably received.

[0006]

As described above, in the conventional measuring device for measuring the motion state of the moving body, the motion detecting state of the magnetic body is detected by the magnetic detecting section arranged close to the magnetic detecting section. The radio signal is transmitted from the transmitter as the rotation detection signal for detecting the rotation of the wheel, and the rotation detection signal is received by the receiver of the operation display unit including the calculation unit. The result of calculating the running state is displayed on the display.

Therefore, for example, in the case of the above cycle computer, a magnetic body and a magnetic detector for detecting the magnetism,
Alternatively, if the mounting position with respect to the operation display unit that receives the magnetic detection signal wirelessly transmitted from this magnetic detection unit deviates from the proper position, the magnetic detection signal for measuring the motion state of the moving body can be detected. There is a problem that the running state of the bicycle cannot be measured correctly because the magnetic detection signal that is not transmitted or cannot be transmitted and received correctly.

Therefore, it is an object of the present invention to provide a measuring device and its mounting method capable of detecting an optimum mounting position so that each part constituting the measuring device is always mounted at an appropriate position. .

[0009]

In order to solve the above-mentioned problems, a measuring device according to a first aspect of the present invention is provided with a magnetic body attached to a moving part of a moving body, and in the vicinity of an orbit along which the magnetic body moves. A measuring device comprising magnetic detection means for detecting magnetism from the magnetic body, and measuring a motion state of a moving body based on a magnetic detection signal detected by the magnetic detection means,
A signal measuring means for measuring an on-time of the magnetic detection signal detected by the magnetic detection means, and a mounting position of the magnetic body and the magnetic detection means when the on-time of the magnetic detection signal is changed from a predetermined time. The above-mentioned object is achieved by providing a position shift discriminating means for discriminating that the shift position is out of the proper position.

According to another aspect of the measuring apparatus of the present invention, when it is determined by the position shift discriminating means that the mounting positions of the magnetic body and the magnetic detecting means are deviated from proper positions, the user is informed of this. You may make it provide the notification means to notify.

According to a third aspect of the present invention, there is provided a measuring device comprising: a transmitting means for wirelessly transmitting a predetermined measurement signal from the transmitting electromagnetic induction coil by magnetic flux radiation; and a receiving means for receiving the wireless transmitted wave by the receiving electromagnetic induction coil. In the measuring device that performs measurement based on the received measurement signal, the crest value detecting means for detecting a crest value indicating the magnitude of the amplitude of the measurement signal waveform received by the receiving means is provided, and the crest value detecting means The above object is achieved by adjusting the relative positional relationship between the transmission-side electromagnetic induction coil and the reception-side electromagnetic induction coil so that the peak value of the detected magnetic detection signal becomes the highest.

The measuring apparatus according to a fourth aspect may be provided with a crest value display means for displaying the crest value detected by the crest value detecting means according to the third aspect in a visually recognizable manner.

According to a fifth aspect of the present invention, there is provided the measuring apparatus according to the third aspect, further comprising: storage means for storing the peak value detected by the peak value detecting means; and a peak value stored in the storage means and a new value. The selective writing means for comparing the crest value detected by the crest value detecting means with the higher crest value to overwrite the higher crest value in the storage means, and at least one of the electromagnetic induction coils on the transmitting side and the receiving side. A coil orientation detecting means that makes the orientation movable and detects the orientation of the electromagnetic induction coil on the movable side, and a coil that stores the orientation of the electromagnetic induction coil at the time of detecting the highest peak value written by the selective writing means. An attitude storage means, and an electromagnetic wave on the movable side so that the attitude of the electromagnetic induction coil stored in the coil attitude storage means matches the current position of the electromagnetic induction coil detected by the coil attitude detection means. The orientation of the conductive coils may be adjusted.

According to a sixth aspect of the present invention, there is provided the measuring device according to the fifth aspect, further comprising: the posture of the electromagnetic induction coil having the highest peak value stored in the coil posture storing means; and the coil posture detecting means. A notification unit may be provided to notify the user that the current attitude of the electromagnetic induction coil has been matched.

The measuring device according to claim 7 is the measuring device according to claim 3,
In the measuring device described in 4, 5, or 6, while the positions of the electromagnetic induction coils on the transmitting side and the receiving side are fixed, the remaining battery level on the transmitting side is measured based on the peak value detected by the peak value detecting means. A battery remaining amount measuring means may be provided.

The measuring device according to claim 8 is the measuring device according to claim 3,
In the measuring device described in 4, 5, 6 or 7, the movable electromagnetic induction coil may be movably installed outside the case so that the attitude of at least one of the transmitting side and the receiving side of the electromagnetic induction coil can be changed. .

The measuring device according to claim 9 is the measuring device according to claim 3,
In the measuring device described in 4, 5, 6, 7 or 8, the attitude of the transmission side electromagnetic induction coil may be fixed, and only the attitude of the reception side electromagnetic induction coil may be changed.

According to a tenth aspect of the present invention, in the method for mounting the measuring apparatus, the magnetism from the magnetic body mounted on the moving part of the moving body is detected by the magnetic detecting section provided near the orbit along which the magnetic body moves. In a method of mounting a measuring device for measuring a motion state of a moving body, a magnetic body fixing process of fixing a magnetic body to a moving portion of the moving body, and the magnetic detection unit near an orbit of the magnetic body, The above object is achieved by including a magnetic detection part mounting position adjustment process of mounting the magnetic detection signal at a position where the ON time of the magnetic detection signal generated by magnetism from the magnetic material is longest.

The measuring device mounting method according to claim 11 is a method of mounting a measuring device, wherein a predetermined measurement signal is wirelessly transmitted from a transmitting side electromagnetic induction coil and is received by a receiving side electromagnetic induction coil for measurement. A crest value detecting process for detecting a crest value indicating the magnitude of the amplitude of the measurement signal waveform received by the reception side electromagnetic induction coil, and a transmission side electromagnetic induction coil so that the crest value of the detected measurement signal becomes the highest. And the coil position adjusting process for adjusting the relative positional relationship between the receiving side electromagnetic induction coil and the coil position adjusting process.

[0020]

In the present invention, in order to solve the above problems, the signal measuring means measures the on-time of the magnetic detection signal detected by the magnetic detecting means when the magnetic body moves in the vicinity of the magnetic detecting means. Then, when the measured magnetic detection signal ON time is changed to be equal to or longer than a certain time or less than or equal to a certain time, the mounting position of the magnetic body and the magnetic detection unit is deviated from the proper position by the position deviation determining means. Determine that there is.

Therefore, the mounting position of the magnetic material and the magnetic detecting means can be discriminated by the displacement discriminating means, and the user can correct the mounting position based on this.

Further, in the present invention, when the electromagnetic induction coils on the transmitting side and the receiving side for transmitting / receiving the measurement signal are adjusted to appropriate positions, the peak value of the received signal is detected by the peak value detecting means, and the detected peak value is detected. The positions of the electromagnetic induction coils on the transmitting side and the receiving side are adjusted so that the peak value is maximized.

Therefore, the mounting positions of the transmitting side electromagnetic induction coil and the receiving side electromagnetic induction coil can always be kept at optimum positions.

[0024]

EXAMPLES The present invention will be described below based on examples.

[First Embodiment] FIGS. 1 to 7 are views for explaining a measuring device according to a first embodiment of the present invention. Here, a cycle computer for detecting a running state of a bicycle is used as the measuring device. It is applied.

First, the structure will be described.

FIG. 1 is a side view of a bicycle to which the cycle computer 18 according to the first embodiment is applied. In FIG. 1, in the spoke 13 portion of the front wheel 12 of the bicycle 11,
A magnet 14 is attached. On the other hand, a rotation detector 16 is fixed to the fork leg portion of the body 15 of the bicycle 11 outside the rotation track of the magnet 14. Then, the steering wheel 15a above the rotation detecting unit 16 calculates a traveling state such as a traveling distance and a traveling speed based on the number of rotations of the wheel based on the magnetic detection signal detected by the rotation detecting unit 16, and the calculation is performed. The result is displayed on the operation display unit 17.

As described above, the cycle computer 18 for detecting and displaying the running state of the bicycle is composed of the magnet 14, the rotation detecting section 16 and the operation display section 17, and the rotation detecting section 16 detects the rotation of the magnet 14. By detecting and wirelessly transmitting the magnetic detection signal from the transmitter of the rotation detection unit 16 to the receiver of the operation display unit 17, it is not necessary to connect each unit of the measuring device with a cable.

FIG. 2 shows the cycle computer 18 of FIG.
3 is an external view of the rotation detection unit 16 and the operation display unit 17.

In FIG. 2, as the magnet 14 rotates in the direction of the arrow as the wheels rotate while traveling, the magnetic detection signal generated by the rotation detecting section 16 is the electromagnetic induction coil on the transmitting side of the rotation detecting section 16. From 25 to the reception side electromagnetic induction coil 26 of the operation display unit 17 is wirelessly transmitted. Here, in FIG.
As shown in FIG. 3, the transmission-side electromagnetic induction coil 25 and the reception-side electromagnetic induction coil 26 are movably installed outside the case of the rotation detection unit 16 and the operation display unit 17 so that only the electromagnetic induction coil can change direction. By changing only the direction of the electromagnetic induction coil, it is possible to perform position adjustment for improving the reception sensitivity of the electromagnetic induction signal.

Further, as shown in FIG. 2, the operation display unit 17
The data input key 21, the start key 22, and the E key for inputting the weight of the bicycle or the weight of the driver are provided around the circumference of the
An ND key 23, an input key 24 for inputting the circumference of the front wheel and other data are provided. Then, the operation display unit 17 performs a running state calculation process in a calculation processing unit (not shown) based on the input data and the received rotation detection signal, and displays the calculation result in the liquid crystal display device (LC).
D) 27 is displayed as a running state.

Next, FIG. 3 is a diagram showing a circuit example of the rotation detecting section 16 according to the first embodiment. In FIG. 3, the reed switch 30 is turned on when the magnet 14 is in proximity (on time).
Then, the reed switch signal a is output to the detection circuit 31, and when the magnet 14 is separated by a predetermined distance or more, it is turned off (off time).
Therefore, the reed switch signal a is not output to the detection circuit 31.

The detection circuit 31 has an oscillation circuit 32 inside, and when the reed switch signal a from the reed switch 30 is input, it is converted into a continuous clock signal b, and an NPN type via a resistor 33. Is transmitted to the base terminal of the transistor 34.

Capacitors 35 are connected between the collector terminal and the emitter terminal of the transistor 34, respectively. The collector terminal of the transistor 34 is connected to one end of the transmission side electromagnetic induction coil 25, and the emitter terminal is connected to the detection circuit 31.

The transmission-side electromagnetic induction coil 25 causes a resonance phenomenon and radiates an electromagnetic induction signal by the switching operation of the transistor 34 and the LC oscillation circuit composed of the capacitors 35 and 36. This transmitting side electromagnetic induction coil 25
The other end and one end of the capacitor 36 are applied with the voltage Vcc via the resistor 37, and the other end of the capacitor 36 is connected to the emitter terminal of the transistor 34.

FIG. 4 shows the operation display unit 17 according to the first embodiment.
It is a circuit diagram of. 4, in the receiving unit 40, the receiving electromagnetic induction coil 26 regards the AC magnetic flux radiation from the transmitting electromagnetic induction coil 25 of the rotation detecting unit 16 described above as a change in the surrounding magnetic field, and an electromotive force is generated at both ends of the coil 26. Is generated and resonates with the tuning capacitor 41 to receive an electromagnetic induction signal.

The detection circuit 42 amplifies the electromagnetic induction signal appearing at both ends of the reception side electromagnetic induction coil 26 during reception and outputs it to the pulse processing circuit 43. The received amplified signal obtained by amplifying this electromagnetic induction signal has a signal waveform as shown in FIG.

Returning to FIG. 4 again, the pulse processing circuit 43
Outputs as a pulse (rectangular wave) an electromagnetic induction signal component exceeding a predetermined threshold value of the electromagnetic induction signal amplified by the detection circuit 42, counts the number of pulses, and outputs the count value to the CPU 44. Further, the pulse processing circuit 43 detects the peak value T of the amplified electromagnetic induction signal shown in FIG. 6 and outputs the value to the CPU 44. This peak value T is the reference voltage (V
ref), which varies depending on the positional relationship between the electromagnetic induction coils 25 and 26 shown in FIG.
Therefore, the coil position where the peak value T becomes the highest (see FIG.
At the position shown in (a), the electromagnetic induction signal flies to the farthest position, and the reception sensitivity becomes good.

As described above, the rotation detection unit 16 and the operation display unit 17 are checked by observing the peak value of the received electromagnetic induction signal.
It is possible to detect the positional relation between the electromagnetic induction coil 25 on the transmitting side and the electromagnetic induction coil 26 on the receiving side optimally.

The CPU 44 has a program RO (not shown).
M is provided, and various running states (running speed, running distance, etc.) are calculated by calculation based on the program stored in the program ROM, various parameters stored in the RAM (not shown), and the rotation detection signal. Then, it can be displayed on the display unit 47. Also, CPU
For example, 44 can store the peak value T detected by the pulse processing circuit 43 described above and the position data of the reception side electromagnetic induction coil 26 detected by the position sensor 48 described later in the RAM in association with each other. In particular, in this embodiment, the RAM stores the position data of the reception-side electromagnetic induction coil 26 when the highest peak value is detected. Therefore, the RAM always stores the optimum mounting position of the reception-side electromagnetic induction coil 26.

Therefore, for example, when the peak value of the received signal becomes equal to or less than the predetermined value, the optimum position data of the transmission side electromagnetic induction coil 25 and the reception side electromagnetic induction coil 26 is read out from the RAM and is set as the current position data. By making a comparison, the optimum mounting position can be corrected. Also, CPU4
4 detects the number of rotations of the wheel per unit time based on the magnetic detection signal input every time the wheel makes one rotation from the detection circuit 42 described above, and detects the circumference of the wheel and the running time which are input in advance. The traveling distance and traveling speed are calculated accordingly, and the display drive circuit 46 is controlled to display data indicating the traveling state of the bicycle on the display unit 47.

The key input section 45 comprises a data input key 21, a start key 22, an END key 23, an input key 24, etc. shown in FIG. 2, and when the driver inputs predetermined data, this is stored in a RAM (not shown). Remember.

The display drive circuit 46 is, for example, a display unit 47.
In the case of a liquid crystal display panel, the liquid crystal display panel is composed of a driver for driving a liquid crystal, and drives the liquid crystal according to image data input from the CPU 44 to display a predetermined image on the display unit 47.

The display section 47 is composed of a liquid crystal display panel or the like here, and displays the running state of the bicycle.
By graphically displaying the peak value of the received electromagnetic induction signal and the position of the reception side electromagnetic induction coil, it is possible to easily instruct the user about the proper mounting positions of the rotation detection unit 16 and the operation display unit 17. When detecting the remaining battery level of the rotation detector 16 based on the peak value of the received electromagnetic induction signal, the remaining battery level is displayed graphically.

The position sensor 48 is a sensor for detecting the direction of the receiving electromagnetic induction coil 26. The CPU 44 can grasp the direction of the reception side electromagnetic induction coil 26 from the position detection signal from the position sensor 48.

The speaker 49 informs the positional deviation by voice when the peak value of the received electromagnetic induction signal becomes less than a predetermined value. Further, when adjusting the mounting positions of the rotation detection unit 16 and the operation display unit 17, the position of the reception-side electromagnetic induction coil 26 showing the maximum peak value stored in the RAM and the reception-side electromagnetic detection detected by the position sensor 48. When the current position of the induction coil 26 matches, the voice of the speaker 49 is used to notify this.

FIG. 5 is a diagram showing the receiving sensitivity with respect to the positional relationship between the transmitting side electromagnetic induction coil 25 and the receiving side electromagnetic induction coil 26. FIG. 5A is a diagram showing the positional relationship with the best receiving sensitivity. (B) is a diagram showing a positional relationship in which reception sensitivity is poor.

As shown in FIG. 5, the electromagnetic induction coil of the first embodiment has a rod-shaped coil on the transmitting side and a bobbin type coil on the receiving side.

In the case of FIG. 5 (a), since the magnetic fluxes of the electromagnetic induction coils on the transmission side and the reception side face each other, the electromagnetic induction signal is in the positional relationship that flies farthest, and high reception sensitivity is obtained. can get. In the case of the positional relationship shown in FIG. 5 (a), the electromagnetic induction signal shows the maximum peak value T as shown in FIG.

Further, in the case of FIG. 6B, since the magnetic fluxes of the electromagnetic induction coils on the transmitting side and the receiving side are in the intersecting direction,
The position where the electromagnetic induction signal does not fly the most is shown in FIG.
The reception sensitivity is lower than that in the case of (a).

The cycle computer according to the first embodiment is configured as described above, and its operation will be described below.

First, when the driver gets on the bicycle 11 shown in FIG.
The magnet 14 fixed to the second spoke 13 rotates.

As shown in FIG. 3, the reed switch 30 provided in the rotation detecting section 16 is turned on / off every time the wheel makes one rotation and the magnet 14 passes, and the reed switch signal a is generated. To be done.

In the detection circuit 31, the oscillation circuit 32 outputs the clock signal b of a predetermined cycle based on the input reed switch signal a. NPN transistor 34
When the clock signal b is input to the base terminal, ON / OFF is repeated for a minute time, and a resonance pulse (electromagnetic induction signal) is generated from the electromagnetic induction coil 25 on the transmitting side in a minute time immediately after the magnet passes. Is emitted.

On the other hand, on the receiver side shown in FIG.
The resonance pulse radiated from the transmission side electromagnetic induction coil 25 of the rotation detection unit 16 is received by the reception side electromagnetic induction coil 26 of the reception unit 40. This reception signal generates an electromotive force at both ends of the reception-side electromagnetic induction coil 26 every time the front wheel 12 makes one rotation, and the detection circuit 42 amplifies the reception signal resonated by the tuning capacitor 41.

This received amplified signal is applied to the pulse processing circuit 43.
At the same time, a pulse (rectangular wave) is taken out and the peak value T from the reference voltage value (Vref) of the electromagnetic induction signal shown in FIG. 6 is detected.

The CPU 44 counts the number of rotations of the wheels of the bicycle based on the pulse input from the pulse processing circuit 43, and obtains the current running speed (hour) by "(3600 / count cycle) x circumference". Along with the calculation, the traveling distance up to the present is calculated by the “integrated count number × perimeter”, the calculation result is stored in a RAM (not shown), the display drive circuit 46 is driven, and the traveling state is displayed on the display unit 47. Display it.

The CPU 44 of the first embodiment constantly monitors the peak value T of the electromagnetic induction signal detected during traveling in the pulse processing circuit 43, and the detected peak value T
Is less than or equal to a predetermined value, it can be detected that the rotation detection unit 16 and the operation display unit 17 are attached at positions, especially the electromagnetic induction coils 25 and 26 on the transmission side and the reception side are deviated from proper attachment positions.

Therefore, as shown in the flow chart of FIG. 7, when the electromagnetic induction coil is newly installed or the mounting position is changed, the electromagnetic induction coils 25 and 2 on the transmitting side and the receiving side are arranged.
The mounting position relationship of 6 is changed (step S100). In this case, in the pulse processing circuit 43, the peak value T of the received signal
Measurement processing is performed (step S101).

Here, the CPU 44 controls the electromagnetic induction coil 2
The highest peak value detected when 5 and 26 are at the optimum positions is stored in the RAM in advance, or the peak value detected by the pulse processing circuit 43 is stored in the RAM and then detected. The highest peak value can be stored in the RAM by repeatedly performing the process of leaving the peak value higher than the peak value.

As described above, with the highest peak value stored in the RAM, the CPU 44 sets the peak value T detected when the position of the electromagnetic induction coil is changed (step S10).
2) Compare the highest peak value in the RAM (step S103).

The peak value T of the current received signal detected by the pulse processing circuit 43 is compared with the maximum peak value stored in the RAM, and the detection operation of the peak value T is continued until it matches the maximum peak value. During this time, the user keeps changing the positions of the transmitting electromagnetic induction coil 25 and the receiving electromagnetic induction coil 26. When the detected peak value T matches the maximum peak value, the CPU 44 drives the display drive circuit 46 to display on the display unit 47 that the electromagnetic induction coil is at the optimum position, and drives the speaker 49. Then, the fact is notified to the user by voice notification. Thereby, the position of the electromagnetic induction coil is corrected to an appropriate position (step S104).

As described above, since the cycle computer of the first embodiment reliably wirelessly transmits the magnetic detection signal detected by the rotation detecting unit 16 from the rotation detecting unit 16 to the operation displaying unit 17, the operation displaying unit Based on the peak value of the received signal received at 17, the mounting position is corrected to the position where the peak value is the highest. As a result, the rotation detection unit 16 and the operation display unit 17 of the cycle computer can be attached at the most suitable positions.

[Second Embodiment] The second embodiment is a magnet 14 of a cycle computer for detecting the running state of a bicycle,
When the magnetic field of the magnet 14 causes a positional deviation with respect to the rotation detection unit 16 that detects the rotation state of the wheel, the position is corrected to an appropriate mounting position.

FIG. 8 shows a magnet 1 fixed to the front wheel of a bicycle.
4 is a diagram showing a positional relationship between 4 and the reed switch 30 of the rotation detection unit 16 that detects the rotation state of the magnet 14. FIG. Figure 8
As shown in FIG. 4, the magnet 14 is attached to the spoke portion of the front wheel of the bicycle (not shown), and the fork leg portion (not shown) outside the rotation track 50 of the magnet 14 has a space of about several millimeters (indicated by d in the figure). A reed switch 30 is attached at a distance. And while the bicycle is running, the magnet 1
Each time 4 passes near the reed switch 30, the reed switch 30 is turned on by the influence of the magnetic field, and one magnetic detection signal (reed switch signal) is output each time the wheel makes one rotation, and the unit time of the wheel is changed. The number of rotations per hit can be detected.

FIGS. 9A and 9B show the case where the magnets 14 are attached to the spokes of the wheel at different positions. Specifically, FIG. 9A shows a case where the N pole and the S pole are arranged side by side along the rotation trajectory of the magnet 14,
FIG. 9B shows a case where the N pole and the S pole are arranged so as to be orthogonal to the rotational trajectory of the magnet 14.

FIG. 10 is a diagram showing the shape of the magnetic flux radiated from the magnet 14. Then, in the hatched area shown in FIG. 10, when the reed switch 30 passes, the reed switch is turned on. Therefore, as shown in FIG.
When the mounting positions of the reed switch 30 and the magnet 14 are displaced and the distance becomes larger than d (here, 10 to 15 mm), the reed switch 30 does not turn on even if the wheel rotates. Therefore, it is necessary to detect the mounting position of the reed switch 30 and the magnet 14 before being displaced by the predetermined distance d or more, and correct the mounting position. Therefore, as the reed switch 30 moves away from the magnet 14, the hatched area showing the magnetic flux of the magnet 14 becomes narrower as shown in FIG. 10, so that the on time of the reed switch signal becomes shorter and the off time becomes longer.

FIG. 11 is a signal waveform diagram showing the relationship between the on-time and off-time of the reed switch signal.

As shown in FIG. 11, when the mounting positions of the magnet 14 and the reed switch 30 are displaced and the gap is increased, the on time of the reed switch signal is shortened as described above.
The off time becomes longer and the duty decreases. Therefore, in the second embodiment, the on-time of the reed switch signal is constantly detected, and when the on-time is less than or equal to a predetermined time (distance between the two) or more than a predetermined time (both The distance is narrowed), and it is determined that a positional deviation has occurred, and the mounting position is corrected. 12
FIG. 6 is a circuit configuration diagram of a rotation detection unit according to a second embodiment.
Reference numerals 14, 25, and 30 to 37 in FIG.
Since the configuration is the same as the same reference numeral in FIG. 3 showing the rotation detection unit of the embodiment, the description thereof will be omitted. The characteristic configuration of the rotation detection unit in the second embodiment is that the detection circuit 31 includes a CPU.
This is the point where 60 and the speaker 61 are connected.

The CPU 60 controls the entire rotation detector and detects the on-time of the reed switch signal a input to the detection circuit 31 while the bicycle is running. And
When the on-time of the reed switch signal a is shorter than the predetermined length, it means that the magnet 14 and the reed switch 30 are displaced in the direction of increasing the distance, and when the on-time is long, the interval is narrowed. This is the case when the position is displaced in the direction.

In the speaker 61, the CPU 60 has the magnet 1
4 and reed switch 30 position deviation is detected,
The user is informed by voice.

The second embodiment is configured as described above, and its operation will be described below.

The driver gets on the bicycle 11 shown in FIG.
When you enter the running state by pushing the pedal (step S20
0), the magnets 14 fixed to the spokes 13 of the front wheels 12 of the bicycle 11 start to rotate.

As shown in FIG. 12, the reed switch 30 of the rotation detecting section performs an on / off operation every time the wheel makes one rotation and the magnet 14 passes through to generate the reed switch signal a.

Then, in the detection circuit 31, the oscillation circuit 32 outputs the clock signal b of a predetermined cycle based on the input reed switch signal a.

Further, the reed switch signal a input to the detection circuit 31 is output to the CPU 60 and the on time of the reed switch signal a is detected. And this CPU
In 60, the ON time of the reed switch signal, which is a reference when the magnet 14 and the reed switch 30 are attached in an optimum state, is stored in the ROM or the like. Therefore, the CPU 60 compares the reference on-time with the sequentially detected on-time to check whether the on-time of the reed switch signal has changed (step S201).

Here, when the on-time of the reed switch signal changes, the CPU 60 drives the speaker 61 to give a voice notification of the positional deviation, and although not shown, a liquid crystal display unit is used instead of the speaker 61. If it is provided, it will be displayed on the display screen with characters and pictograms, etc.
The user can be notified (step S202).

The above-described operation of detecting the positional deviation between the magnet 14 and the reed switch 30 is repeated until the traveling ends (step S203). Therefore, when the mounting positions of the magnet 14 and the reed switch 30 are deviated due to the vibration of a running bicycle, the user is notified of the positional deviation by voice from the speaker 61 or the positional deviation is displayed on the display screen. Can be informed.

These position deviation detecting operations are stopped when the traveling state is completed (step S203).

As described above, the cycle computer according to the second embodiment detects the on-time of the reed switch signal detected by the reed switch 30 to detect the magnet 1
It is possible to easily detect whether the positional relationship between the switch 4 and the reed switch 30 is deviated. At the same time, it is also possible to adjust the magnet 14 and the reed switch 30 to appropriate positions by looking at the on-time of the reed switch signal. For example, in the second embodiment, the liquid crystal display unit installed above is graphically displayed so as to compare the detected on-time of the reed switch signal with the reference on-time. The position of the rotation detection unit is adjusted so that the ON times match. As a result, the magnet 14 and the reed switch 30 can be attached at the optimum positions.

[0081]

According to the present invention, when the magnetic body moves near the magnetic detecting means, the ON time of the magnetic detection signal detected by the magnetic detecting means is measured by the signal measuring means. Then, when the measured on time of the magnetic detection signal is equal to or less than the fixed time, it is understood by the position shift determining means that the mounting positions of the magnetic body and the magnetic detecting means are shifted from the proper positions.

Therefore, since the mounting position of the magnetic material and the magnetic detecting means can be discriminated by the displacement discriminating means, the user can correct the mounting position based on this.

Further, according to the present invention, the positional relationship between the electromagnetic induction coils for transmitting and receiving the measurement signal is such that the peak value of the received signal detected by the peak value detecting means becomes the highest, or the electromagnetic induction coil on the transmitting side or the receiving side. Position at least one of the.

Therefore, the attachment positions of the transmission side electromagnetic induction coil and the reception side electromagnetic induction coil can always be kept at optimum positions.

[Brief description of drawings]

FIG. 1 is a side view of a bicycle to which a cycle computer according to a first embodiment is applied.

FIG. 2 is an external view of a rotation detection unit and an operation display unit of the cycle computer shown in FIG.

FIG. 3 is a diagram illustrating a circuit example of a rotation detection unit according to the first embodiment.

FIG. 4 is a circuit diagram of an operation display unit according to the first embodiment.

FIG. 5 is a diagram showing reception sensitivity with respect to a positional relationship between a transmission side electromagnetic induction coil and a reception side electromagnetic induction coil.

FIG. 6 is a diagram showing a waveform of an amplified electromagnetic induction signal.

FIG. 7 is a flowchart illustrating the operation of the first embodiment.

FIG. 8 is a diagram showing a positional relationship between a magnet fixed to a front wheel of a bicycle and a reed switch of a rotation detection unit that detects a rotation state of the magnet.

FIG. 9 is a case where the positions where the magnets are attached to the spokes of the wheels are different.

FIG. 10 is a diagram showing the shape of magnetic flux radiated from a magnet.

FIG. 11 is a signal waveform diagram showing the relationship between the on-time and off-time of the reed switch signal.

FIG. 12 is a circuit configuration diagram of a rotation detection unit according to a second embodiment.

FIG. 13 is a flowchart illustrating the operation of the second embodiment.

[Explanation of symbols]

 11 Bicycle 12 Front Wheel 13 Spoke 14 Magnet 15 Car Body 15a Handle 16 Rotation Detecting Section 17 Operation Displaying Section 18 Cycle Computer 25 Transmitting Side Electromagnetic Induction Coil 26 Receiving Side Electromagnetic Induction Coil 30 Reed Switch 40 Receiving Section 41 Tuning Capacitor 42 Detection Circuit 43 Pulse Processing Circuit 44 CPU 45 Key input unit 46 Display drive unit 47 Display unit 48 Position sensor 60 CPU 61 Speaker

Claims (11)

[Claims] 1. A magnetic body attached to a moving part of a moving body,
The magnetic body is provided in the vicinity of an orbit along which the magnetic body moves, and includes magnetic detection means for detecting magnetism from the magnetic body, and measures the motion state of the moving body based on the magnetic detection signal detected by the magnetic detection means. In the measuring device, the signal measuring means for measuring the on time of the magnetic detection signal detected by the magnetic detecting means, and the magnetic substance and the magnetic material when the on time of the magnetic detection signal changes from a predetermined time. A measuring device, comprising: a positional deviation determining means for determining that the mounting position of the detecting means is deviated from an appropriate position. 2. A notification device for notifying a user when the measuring device further determines that the mounting positions of the magnetic body and the magnetic detecting device are deviated from proper positions by the positional deviation discriminating device. The measuring device according to claim 1, further comprising means. 3. The measurement signal received is provided with transmission means for wirelessly transmitting a predetermined measurement signal from the transmission-side electromagnetic induction coil by magnetic flux radiation and reception means for receiving the wireless transmission wave by the reception-side electromagnetic induction coil. In a measuring device that performs measurement based on, a crest value detecting means for detecting a crest value indicating the magnitude of the amplitude of the measurement signal waveform received by the receiving means is provided, and a magnetic detection signal detected by the crest value detecting means A measuring device, characterized in that the relative positional relationship between the transmitting side electromagnetic induction coil and the receiving side electromagnetic induction coil is adjusted so that the peak value becomes the highest. 4. The measuring device according to claim 3, further comprising a peak value display means for displaying the peak value detected by the peak value detecting means so as to be visually recognized. 5. The measuring device further stores a peak value detected by the peak value detecting means, a peak value stored in the storing means, and a peak value newly detected by the peak value detecting means. And a writing means for overwriting the higher crest value in the storage means, and at least one of the electromagnetic induction coils on the transmitting side and the receiving side is movable, and the direction of the electromagnetic induction coil on the movable side is movable. And a coil attitude storage means for storing the attitude of the electromagnetic induction coil at the time of detection of the highest peak value written by the selective writing means. The direction of the electromagnetic induction coil on the movable side is adjusted so that the stored attitude of the electromagnetic induction coil and the current position of the electromagnetic induction coil detected by the coil attitude detection means match. Measurement device according to claim 3. 6. The measuring device further includes a posture of the electromagnetic induction coil having the highest peak value stored in the coil posture storage means and a current posture of the electromagnetic induction coil detected by the coil posture detection means. The measuring device according to claim 5, further comprising an informing unit for informing a user of the coincidence. 7. A battery residual amount measurement for measuring a battery residual amount on the transmitting side based on a peak value detected by the peak value detecting means with the positions of the electromagnetic induction coils on the transmitting side and the receiving side fixed. The measuring device according to claim 3, 4, 5 or 6, further comprising means. 8. The electromagnetic induction coil on the movable side is movably installed outside the case so that the attitudes of at least one of the electromagnetic induction coils on the transmission side and the reception side can be changed. , 6 or 7 measuring device. 9. The posture of the electromagnetic induction coil on the transmitting side is fixed, and only the posture of the electromagnetic induction coil on the receiving side can be changed.
Or the measuring device according to 8. 10. A measuring device for measuring a motion state of a moving body by detecting magnetism from a magnetic body attached to a moving portion of the moving body by a magnetic detection unit provided near an orbit along which the magnetic body moves. In the mounting method, a magnetic substance fixing process for fixing a magnetic substance to a moving portion of the moving body, and a magnetic detection signal generated by magnetism from the magnetic body, the magnetic detecting portion being in the vicinity of an orbit of the magnetic body. A method for mounting a measuring device, comprising: a magnetic detection part mounting position adjusting process for mounting at a position where a long ON time is detected. 11. A method of mounting a measuring device, wherein a predetermined measurement signal is wirelessly transmitted from a transmission side electromagnetic induction coil, and the reception side electromagnetic induction coil receives the measurement signal for measurement, and the reception side electromagnetic induction coil receives the measurement signal. The peak value detection process that detects the peak value that indicates the magnitude of the amplitude of the measurement signal waveform, and the relative value of the electromagnetic induction coil on the sending side and the electromagnetic coil on the receiving side so that the peak value of the detected measurement signal becomes A method of mounting a measuring device, comprising: a coil position adjusting process for adjusting a positional relationship.