JP2000162231A - Impact force detecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an impact-force detecting apparatus by which an external force applied to a portable terminal device is detected and which issues a warning to a user. SOLUTION: This impact force detecting apparatus is constituted of a wire strain gauge circuit 32 which is attached to the circuit board of an apparatus body and in which a resistance value is changed due to the strain of the board due to an external impact force. In addition, it is constituted of a voltage-value measuring circuit 34 which measures changes in the resistance value. In addition, it is constituted of a voltage-value logging circuit 36 which acquires data on a measured voltage change value. An impact-force detection circuit 10 detects the voltage change value of the wire strain gage circuit 32, so as to notify of this to an impact force recognition circuit 12. The impact force recognition circuit 12 selects a sealing method, according to the notified voltage change value so as to notify to a warning notifying circuit 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact force detecting device for detecting an external force applied to a portable terminal device by providing a detection circuit on a circuit board of the portable terminal device and warning a user.

[0002]

2. Description of the Related Art An example of a conventional portable terminal device having an impact force detecting function is described in Japanese Patent Application Laid-Open No. 6-348357. The portable terminal device with an impact force detection function described in this publication warns a user when it detects that a key is pressed by an external device (a force higher than a normal operation) on an input device such as a keyboard. If the power is not removed as a result of the warning, transfer the user information to a secure storage device, store it, and turn off the operating power and backup power to prevent damage to internal devices and data corruption. It is.

A conventional portable terminal device having an impact force detecting function will be described with reference to FIG. FIG. 5 is a block diagram showing an example of a conventional portable terminal device with an impact force detection function. FIG.
The portable terminal device with an impact force detection function shown in FIG. 1 includes a display device 16 for displaying characters and symbols, and an electrically rewritable E.
An IC card provided with an EPROM, a user-removable storage device 18; a temporary storage device 20 composed of a RAM for temporarily storing characters and codes; a central processing unit 22 for controlling the entire device; An input device 24 such as a keyboard for inputting a code, etc .; a user information transfer means 56 for transferring user information in the temporary storage device 20 to the storage device 18 for storage; An external force recognizing means 58 capable of recognizing whether an external force has been applied, an external force detecting means 60 provided in the input device 24 and capable of detecting an external force applied to the housing, and an external force recognizing means 58 having access to the external force A warning sound is generated in accordance with an instruction from the force recognition means 58, a warning message 62 is displayed on the display device 16, and a power supply 100V for operating the entire apparatus is used. A smoothing power supply 64, a backup power source 66 such as a battery, a power source 68 and a smooth power supply 64 and the backup power supply 66, forcing smooth power supply 64 by accepting the command of the external force recognition means 58
And a forced power cutoff means 70 for turning off the backup power supply 66.

When the input device 24 receives a physical external force, the external force detecting means 60 detects the external force and notifies the external force recognizing means 58. The external force recognizing means 58 is provided in accordance with the magnitude of the external force.
, The user is warned by the warning means 62, the power supply 68 is cut off by the forced power cut-off means 70, and the warning is given to the user by the warning means 62 when the power is small.

[0005]

In the above-mentioned technology, detection of external impact force using an input device such as a keyboard cannot be performed when external impact force is applied to other parts. That is, it is not possible to detect all external impact forces assumed to be applied to the terminal device. Also,
The detection circuit constitutes a circuit using an AC 100 V input as an operation power supply. When the portable terminal apparatus is used in a portable manner as a main use, the operation power supply becomes a battery and cannot be operated in some cases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an impact force detecting device which has a circuit for detecting an external force on a circuit board of a portable terminal device and which issues a warning to a user when an external force is applied to the portable terminal device.

[0007]

According to the present invention, there is provided an impact force detecting device provided on a circuit board of a portable terminal device, wherein the circuit board detects a deformation of the board caused by receiving an external impact force. An impact force detection circuit that records and outputs a signal obtained by converting the deformation into a signal, and receives and analyzes the detected signal, analyzes the impact received on the circuit board by the external impact force, and provides the user with the analysis. An impact force recognition circuit that determines and outputs a warning, a warning notification circuit that obtains the output, and notifies the user of a message prompting the determined warning, and an operation of supplying a voltage for operation to the device And a voltage monitoring circuit for monitoring a constant voltage required for the device to operate correctly.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram illustrating an impact force detection device according to the present invention. FIG. 2 is a block diagram of the impact force detection circuit and the impact force recognition circuit of the present invention. FIG. 3 is a diagram of a resistance wire strain gauge circuit. As shown in FIG. 1, a portable terminal device having an impact force detection function according to the present invention includes an impact force detection circuit 10 disposed on a circuit board of the portable terminal device for detecting an external impact force, and an external impact force detected signal. An impact force recognition circuit 12 for analyzing a force, a warning notification circuit 14 for notifying a user of a message prompting a warning by the analyzed external impact force, a display device 16 for displaying a warning notification message, A storage device 18 for storing specified value data for comparison with the recorded value data, a control program, and other programs, a temporary storage device 20 as a work area for temporarily developing the program, and a portable terminal device. Central processing unit 22 controlled by a control program
And input device 24 capable of inputting various commands and data
And an operation power supply 26 for supplying a voltage for driving the portable terminal device, a voltage monitoring circuit 28 for monitoring that a constant voltage is supplied from the operation power supply 26, and a case where the constant voltage is not supplied. And an impact force detection operation assurance circuit 30 for stopping power supply to the impact force detection circuit 10.

[0009] As shown in FIG.
Is mounted on a circuit board of the apparatus main body, and when an external impact force is applied, the board is distorted by the impact force, and the resistance value changes with the strain. It comprises a voltage value measuring circuit 34 for measuring a changing and changing voltage value, and a voltage value logging circuit 36 for collecting data of the measured voltage fluctuation value. When the voltage fluctuation value collected by the voltage value logging circuit 36 exceeds a predetermined value specified in advance, the impact force recognizing circuit 12 stores data of the specified value stored in the storage device 18 in proportion to the external impact force. And an interrupt level generating circuit 4 for generating an interrupt level according to the determined coping method.
0 and a command generation circuit 42 for generating a command based on the coping method based on the generated interrupt level and notifying the command to the warning notification circuit 14. Impact force detection circuit 10
Is connected to the voltage monitoring circuit 28 and operates by receiving power supply, detects a voltage variation value of the resistance wire strain gauge circuit 32, and notifies the impact force recognition circuit 12, and the impact force recognition device 12 transmits the notified voltage variation. A coping method is selected according to the value, and the warning notification circuit 14 is notified.

As shown in FIG. 3, the resistance wire strain gauge circuit 32 includes an Rg resistance wire strain gauge 44 and an R1 resistance 46.
, R2 resistor 48 and R3 resistor 50 are connected like a Wheatstone bridge circuit, an input voltage is applied between contacts A and B, and a change in voltage between contacts C and D is detected. R used in the resistance wire strain gauge circuit 32
g resistance wire strain gauge 18, R1 resistance 19, R2 resistance 2
0, each resistance value condition of the R3 resistor 21 is Rg = R + △ R,
R1 = R2 = R3 = R, R≫ △ R. When an external impact force is applied to the portable terminal device, the Rg resistance wire strain gauge 44
The resistance value changes, the output voltage values at the contacts C and D change, and the magnitude of the change in the voltage value makes it possible to detect the magnitude of the impact force.

The operation of the embodiment of the present invention will be described with reference to FIGS. When an external impact force is applied to the mobile terminal device,
The circuit board of the mobile terminal device is distorted, and the Rg resistance wire strain gauge 44 is distorted. The resistance value of the Rg resistance wire strain gauge 44 changes due to distortion, the potential between the contact points B and D changes, and the voltage value measuring circuit 34 measures the change in potential, and the voltage change is measured by the voltage value logging circuit 36. Can be referenced at any time by recording and recording,
When the value exceeds a prescribed value or when a continuous external impact force is detected, a notification is sent to the impact force recognition circuit 12. The impact force recognizing circuit 12 recognizes the change in the voltage value as an interrupt level determining circuit 38.
The interrupt level generation circuit 40 notifies the command generation circuit 42 of an operation instruction based on the analysis result, analyzes the voltage change, and determines the influence on the portable terminal device. Depending on the level, it is determined whether to instruct the warning notification circuit 14 to notify a message urging the user to pay attention to the operation or to instruct the warning notification circuit 14 to notify a warning message,
When it is determined that there is no problem with continued use, the warning instruction circuit 14 is instructed to display an operation caution message on the display device 16, and it is determined that normal operation cannot be guaranteed if external impact is applied again. In case, warning notification circuit 1
4 causes the display device 16 to display a warning message.

Furthermore, in order to operate the impact force detecting circuit 10 normally, it is necessary to supply a constant voltage.
The voltage monitoring circuit 28 having a function of monitoring the supply of the constant voltage and notifying the impact force detection operation assurance circuit 30 of constant voltage drop information when the supply of the constant voltage is stopped. When the constant voltage drop information notification is received from the voltage monitoring circuit 28, a function of determining whether or not the output voltage value accuracy of the resistance strain gauge circuit 32 is guaranteed, and an impact force detection circuit for the voltage monitoring circuit 28 when it is determined that the guarantee is impossible And an impact force detection operation assurance circuit 30 having a function of notifying the power supply stop instruction to the power supply 10.

Further, the impact force detecting device includes a resistance wire strain gauge 32 on a surface layer portion of the circuit board in a portion which is easily distorted due to deflection or torsion of the internal circuit board of the portable terminal device due to an external impact force, that is, a portion which is easily subjected to an impact load. The circuit board inside the mobile terminal device is distorted, and the voltage value change due to the change in the resistance value of the resistance wire strain gauge 32 is collected one by one, the collected voltage value change is recorded, and the recorded value exceeds a predetermined value provided in advance. Operation fluctuation notice to the user by detecting the
Alternatively, a continuous use disable warning notice is issued to the user. In addition, if the portable terminal device continues to receive an external impact force that does not lead to damage, the portable terminal device may be damaged, so logs are collected for voltage fluctuations that do not exceed the specified value, and a function that the user can refer to at any time is provided. Have. The resistance wire strain gauge 32 disposed on the surface of the circuit board may be easily distorted due to the mounting structure of the DISK mounted in the apparatus or the shape of the circuit board, and may be easily absorbed by the circuit board.
K, which is placed in the immediate vicinity of K and is mounted on the mobile terminal device due to distortion of the internal circuit board when the mobile terminal device receives an external impact force
Solder peeling of parts, breaking of board or breakage of IC and DIS
A failure such as K is prevented beforehand, and a warning is issued to the user to handle the apparatus.

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 4 is a block diagram showing an impact force detection circuit and an impact force recognition circuit according to another embodiment of the present invention. FIG.
, A plurality of resistance wire strain gauge circuits 32-1 and 32-
2, 32-3,..., 32-n (n is a natural number) and a voltage value measuring circuit 36 and a voltage value measuring circuit 36 connected to the resistance wire strain gauge circuit 32 to detect a change in voltage value due to strain.
Voltage logging circuit 36 that stores the voltage value measured by
Force detection circuit 52 having
And an interrupt level determining circuit 38 for determining whether or not to warn the user based on a change in the voltage value and determining a countermeasure, and an interrupt level generating circuit 40 for generating an interrupt level according to the determined countermeasure. An impact force recognition circuit 12 having a command generation circuit 42 for generating a command from an interrupt level; a warning notification circuit 14 connected to the impact force recognition circuit 12 to notify a user of a warning by a command; Connected, the voltage supplied from the operating power supply 26 is temporarily not supplied due to external impact force or the like, the voltage cannot be supplied during the impact force detection operation,
It is composed of a power supply for operation when power is turned off when the FF is performed, and an operation power supply 26 connected to the power supply for operation when power is cut off and serving as a power supply for the entire apparatus.

The portable terminal device has a plurality of resistance wire strain gauge circuits 32-1, 32-2, 32-3,.
By having 32-n (n is a natural number), it is possible to increase the number of locations where distortion is measured on the circuit board, and it is possible to perform measurement when there are a plurality of locations where distortion is likely due to the shape of the circuit board. The voltage value measurement circuit 34 includes a plurality of resistance wire strain gauge circuits 32-1, 32-2, 32-3,.
−n (n is a natural number) can be connected, and by recording and notifying each of the resistance wire strain gauge circuits 32, it becomes easy to specify the location of the strain on the circuit board.

Further, the impact force detecting device cannot correctly detect the distortion of the circuit board unless a constant voltage is supplied, and therefore cannot detect the external impact force applied when the power is turned off. For this reason, the voltage supplied from the operation power supply 26 is always constant, and power supply for unconditionally detecting the impact force when the power supply is momentarily interrupted due to an external impact force due to an impact or the like is required. The power-off operation power supply 54 has a function of allowing the user to unconsciously continue the impact force detection operation when the power supply is instantaneously interrupted due to an external shock or the like, and also maintains the voltage supplied from the operation power supply 26 when the power is turned off. Enables detection of external impact force.

[0017]

The impact force detecting device of the present invention can be applied to a specific location of the portable terminal device by disposing the resistance wire strain gage circuit in all portions of the portable terminal device where the impact force is easily absorbed. Measure and detect the external impact force and all possible external shock forces such as vibration, drop impact, torsion / bending, distortion, etc., and record them with a voltage logging circuit. By notifying the user of a good measure, it is possible to prevent data destruction and program runaway during use.

In addition, the impact force detecting device can detect the external impact force by arranging a resistance wire strain gauge on the surface layer of the internal circuit board of the portable terminal device, so that it is not necessary to newly add a special shock sensor. The size and weight of the device can be reduced.

Further, since the impact force detecting device can determine whether or not the portable terminal device can be continuously used by one external impact force, the portable terminal device can process it.
In the case where the portable terminal device can be temporarily used even if it receives one impact force, the portable terminal device cannot be used during use by further receiving an external impact force, thereby avoiding data loss. be able to. In addition, the user can recognize the impact force that has been applied to the portable terminal device because it can prevent continuous use by the user's ambiguous judgment and can refer to the external impact force as log data at any time. It is possible to call attention during the next operation.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an impact force detecting device according to the present invention.

FIG. 2 is a block diagram of an impact force detection circuit and an impact force recognition circuit of the present invention.

FIG. 3 is a diagram of a resistance wire strain gauge circuit.

FIG. 4 is a block diagram illustrating an impact force detection circuit and an impact force recognition circuit according to another embodiment of the present invention.

FIG. 5 is a block diagram showing an example of a conventional portable terminal device with an impact force detection function.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Impact force detection circuit 12 Impact force recognition circuit 14 Warning notification circuit 16 Display device 18 Storage device 20 Temporary storage device 22 Central processing unit 24 Input device 26 Operation power supply 28 Voltage monitoring circuit 30 Impact force detection operation assurance circuit 32 Resistance wire distortion Gauge circuit 34 Voltage measurement circuit 36 Voltage logging circuit 38 Interrupt level determination circuit 40 Interrupt level generation circuit 42 Command generation circuit 44 Rg resistance wire strain gauge 46 R1 resistance 48 R2 resistance 50 R3 resistance 52 Impact force detection circuit 54 When power is turned off Operation power supply 56 User information transfer means 58 External force recognition means 60 External force detection means 62 Warning means 64 Smoothing circuit 66 Backup power supply 68 Forced power supply cutoff means 70 Power supply

Claims (8)

[Claims] 1. A shock provided on a circuit board of a portable terminal device, detecting a deformation of the board caused by the circuit board receiving an external impact force, converting the deformation into a signal, and recording and outputting the detected signal. A force detection circuit, receives and analyzes the detected signal, analyzes the impact received on the circuit board by the external impact force, and determines and outputs a warning to a user by the analysis, and an impact force recognition circuit, A warning notification circuit that obtains the output, and notifies the user of a message that prompts the determined warning; an operation power supply that supplies a voltage for operation to the device; and And a voltage monitoring circuit for monitoring a required constant voltage. 2. The impact force detecting device, comprising: a resistance wire strain gauge circuit configured to include a resistor, and outputting a change in resistance value due to deformation applied to the circuit board by a supplied voltage value; and the output voltage value. The impact force detection device according to claim 1, further comprising: a voltage value measurement circuit that measures a change in the measured value and outputs a measured value; and a voltage value logging circuit that acquires the measured value and stores the measured value. apparatus. 3. The resistance wire strain gauge circuit according to claim 1, wherein the resistance value is R + ΔR, the resistance value of which is provided on the circuit board and whose resistance value changes due to deformation of the circuit board. Are connected to a Wheatstone bridge circuit, and points A and C and points B and D of the Wheatstone bridge circuit are respectively located on diagonal lines, and an input voltage is applied between points A and C. 3. The impact force detecting device according to claim 2, wherein a change in the voltage value between the points B and D occurs. 4. The apparatus for recognizing an impact force acquires the measured value, and when the measured value exceeds a predetermined value, determines a coping method for the user in proportion to the external impact force, and notifies the user. An interrupt level determining circuit that obtains the notification, generates an interrupt level by the coping method, an interrupt level generating circuit that notifies the interrupt level, obtains the interrupt level, and generates a command based on the interrupt level The impact force detecting device according to claim 2 or 3, further comprising: a command generating circuit that outputs the command to the warning notifying unit. 5. The impact force detecting device according to claim 4, further comprising a display device connected to said warning device and capable of displaying a warning to said user. 6. A portable terminal device comprising a plurality of circuit boards provided on a circuit board,
An impact force detection circuit that detects the deformation of the board generated by receiving the external impact force on the circuit board, records and outputs the signal as a signal of the deformation, and receives and analyzes the detected signal; An impact force recognition circuit that analyzes an impact received by the circuit board due to the external impact force, determines and outputs a warning to a user by the analysis, acquires the output, and the determined warning to the user. A warning notification circuit for notifying a message prompting the user, an operation power supply for supplying a voltage for operation to the device, and a power supply for performing an operation of a circuit for detecting an impact force when the power supply is turned off. And a power supply for operation. 7. A plurality of resistance wire strain gage circuits, each comprising a resistance, configured to output a change in resistance value due to deformation received by the circuit board by a supplied voltage value, and The shock according to claim 6, further comprising: a voltage value measurement circuit that measures a change in a voltage value and outputs a measured value; and a voltage value logging circuit that acquires the measured value and stores the measured value. Force detection device. 8. The resistance wire strain gauge circuit according to claim 1, wherein the resistance value is R + ΔR, the resistance value of which is provided on the circuit board and whose resistance value changes due to deformation of the circuit board. Are connected to a Wheatstone bridge circuit, and points A and C and points B and D of the Wheatstone bridge circuit are respectively located on diagonal lines, and an input voltage is applied between points A and C. 8. The impact force detecting device according to claim 7, wherein a change in the voltage value between point B and point D occurs.