JPH09159514A - Measuring device for load or the like on vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the visibility of a display, the operability of equipment, simplify a display device and ensure the effective utilization of cabin space by selectively changing over the indication of a load such as a movable load on a vehicle and a total weight, and the indication of a drive condition or the like. SOLUTION: A start switch is turned on and an indicator switch 61 is turned on during the stoppage of a vehicle. As a result, a controller 100 measures a vehicular load and causes a movable load to be shown on a display device 42. In this case, the switch 61 is selectable between two modes, that is, a mode of movable load indication and a mode of total vehicular weight indication. When the vehicle begins to travel, a travel speed sensor 45 sends out a travel speed detection signal to the controller 100, and then the controller, upon receipt of the signal, causes the display device 42 to show a drive mode before a change to the indication of the movable load. Furthermore, a multi-indication regarding various drive modes can be made via the operation of a multi-indication selector switch 71. Also, the switch 61 receives a brake signal or a signal from the travel speed sensor 45 during the stoppage of the vehicle, and is inoperative during the travel of the vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle load measuring and displaying apparatus for measuring a load and a weight of a vehicle such as a truck.

[0002]

2. Description of the Related Art FIG. 4 is a side view showing an outline of a suspension of a rear-wheel biaxial truck and a vehicle load measuring system. In the figure, 1 is a truck carrier frame, 1
Reference numeral 0 is a front wheel, and 20 and 20 are rear wheels provided in front and rear in pairs.

In large vehicles such as trucks,
Leaf springs 11 are used as suspensions. Among the leaf springs 11, the leaf spring 11a for the front wheel 10 has one end at the loading frame 1
Is supported by a bracket 31 attached to the other end, and the other end is supported by another bracket 31 via a shackle 32 and a shackle pin 34. The central portion of the leaf spring 11a is fixed to the axle case 12 by two U-shaped fixing members 15.

A leaf spring 11 for the rear wheels of the two axes
Has two rows of front and rear axle cases 21A and 21B, the center of which is fixed by a U-shaped fixture 15.
The trunnion bracket 2 connected to the carrier frame 1 is fixed to a trunnion shaft 3 whose both ends are supported by spring seats 4, and both ends are supported by the upper portions of front and rear axle cases 21A and 21B. There is.

In a large-sized vehicle as described above, in order to measure the load and / or the own weight of the vehicle, a member that receives a load due to the weight of the load, that is, the front wheel side is a bracket 31.
And a shackle pin 34 for connecting the shackle 32, a trunnion shaft 3 supported on a trunnion bracket 2 on the rear wheel side, and a sensor such as a magnetostrictive sensing element or a strain gauge is attached to detect a vehicle load applied to these members. There is.

FIG. 5 is a sectional view taken along the axis line of the trunnion shaft around the sensor mounting portion on the trunnion shaft in the rear wheel biaxial track. In FIG. 5, a horizontal shaft portion 3 a of the trunnion shaft 3 is rotatably supported by a lower portion of the trunnion bracket 2 which is spread from the lower surface of the luggage carrier frame 1 in a figure eight shape and is attached. The horizontal shaft portion 3a protruding in the vehicle width direction
As described above, the central portion of the leaf spring 11b is attached to the end of the leaf spring 11b via the spring seat 4 and the U-shaped fixture 15.

A hole 6 having a small diameter is bored from the shaft end 3b in the horizontal shaft portions 3a on both sides of the trunnion shaft 3 along the axis of the shaft. Magnetostrictive sensing element for detection, sensor such as strain gauge 7
b is fitted and attached. Reference numeral 53 denotes an electric harness for transmitting a detection signal from the sensor 7b, which is inserted through the hole 6 and then led out from the shaft end 3b of the horizontal shaft portion 3a to the outside of the vehicle.

In FIG. 4, the electric harness 53a,
The vehicle load detection signals from the shackle pin 34 side sensor 7a and the trunnion shaft 3 side sensor 7b transmitted via 53b are input to the controller 100 after being amplified by the amplifiers 41a and 41b.

In the controller 100, predetermined processing is performed based on the input signals such as the vehicle load detection signal, the switching signal from each switch described later, the vehicle speed detection signal from the vehicle speed sensor, and the like. A display signal such as the total weight of is sent to the display device 42 in the cab.

FIG. 6 is a block diagram showing a conventional example of the vehicle load measuring and displaying device. In FIG.
Reference numeral 100 denotes a controller, which detects vehicle load signals from the load sensor 7a on the shackle pin side and the load sensor 7b on the trunnion shaft side as shown in FIG. 4 and FIG. Via the amplifiers 41a and 41b, and the vehicle speed sensor 45 outputs a vehicle speed detection signal and a reset switch 46.
The switching signal from is input.

The reset switch 46 is a switch for performing "0" (zero) reset when calibrating the vehicle load. In the conventional measurement display device shown in FIG. 6, the reset switch 46 and the display device 42 are housed in the control box 200 integrally with the controller 100. Further, the controller 100 has a function of calculating the loaded amount, the total weight, and the like of the vehicle based on the detection signal of the vehicle load, the switching signal from the reset switch 46, and the like, and displaying it on the display device 42. While the vehicle is running, accurate measurements cannot be made due to vibration during running.

Therefore, the applicant of the present invention, as a comparative example of the present invention,
We devised a system that holds the load display while the vehicle is running.

The structure will be described with reference to the block diagram of FIG. 7 and the flowchart of FIG.
Vehicle load detection signals from the shackle pin load sensor 7a and the trunnion shaft load sensor 7b are input to the central control unit 61 of the controller 100 via amplifiers 41a and 41b.

Switching signals from the start switch 47 and the hold release switch 48 and a vehicle speed detection signal from the vehicle speed sensor 45 are also input to the central control section 61. Further, the display device 42 is connected to the central control unit 61 via a stacking display holding unit 62.

The operation of the load measurement and display system configured as described above will be described with reference to FIG. 8. During traveling (when the vehicle speed V> 0), the central control unit 61 detects the vehicle speed. In response to the signal, the loading display holding unit 62 holds the display of the loading amount calculated by the central control unit 61 based on the vehicle load detection signals from the load sensors 7a and 7b. (Step (1) in FIG. 8) As a result, the load measurement and display system becomes unusable.

When the vehicle is stopped (vehicle speed V = 0), the central control unit 61 determines whether or not the load amount display is held, and detects and outputs the hold. (Step (2)) The vehicle stops, and the driver turns on the hold release switch 48.
When set to N, the hold of the load capacity is released, and the load capacity is displayed on the display device 42. (Step (3)
And (4))

[0017]

However, the above-mentioned conventional vehicle load measurement, load capacity measurement and display system in the display device have the following problems.

(1) In the loading amount measuring and displaying system as shown in FIG. 6, the display device 42 for displaying the loading amount and the calibration reset switch 46 are integrated with the controller 100 to form a control box. 20
Since it is mounted on the control box 200, it is necessary to provide the control box 200 at a place where the driver can visually check the display of the display device 42 and operate the reset switch 46.
00 is limited in installation location, and it is difficult to maintain good visibility of the load display and operability of operating devices such as reset switches.

(2) In the load weight measurement and display system as shown in FIGS. 7 and 8, the display of the load amount is held and the use of the load amount measuring system is stopped while the vehicle is traveling. However, at this time, the display of the loaded weight is displayed on the display device, and unless the power of the loaded amount measuring system is turned off, the loaded amount is not erased and the handleability is not good. In particular, even though the device is held while traveling, the loading amount is in the display state, the display part of that part is always occupied, and there is a part for displaying the operating state etc. Be restricted.

The present invention has been made in view of the above problems, and in the vehicle load measuring device, the visibility of the display system for measuring and displaying the load capacity and the operability of equipment such as various switches are improved. The first purpose is to make effective use of the cab space.

Further, when the display of the load amount is unnecessary such as when the vehicle is running, the load amount display is automatically erased to improve the operability of the system.
A second object is to simplify the display device by making it possible to share the display device with the display of the load amount and the display of the operating state such as multiple display.

[0022]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems. The invention according to claim 1 uses a sensor mounted on a member such as a shackle pin or a trunnion shaft that receives the weight of the vehicle to load the vehicle. In a vehicle load measuring device configured to detect a vehicle load such as a gross weight, a load display of a vehicle, a load such as a gross weight, and other displays such as a driving state (hereinafter referred to as a driving state display) To
A control unit for selectively displaying on a display device based on a predetermined signal is provided, and the display contents of the load display and the operating state display can be selectively selected based on a vehicle speed signal or / and a signal from a load display changeover switch. It is characterized in that it can be switched to.

According to such a technical means, the load display and the display of the operation information and the like can be appropriately switched by one display device. In other words, the load display and the operation state display, etc. can be performed by one display device. Since it is possible to display at any time simply by switching the display switch, etc., not only is the part that displays the operating status not restricted, but the visibility of the measurement display system and the operability of equipment such as various switches are improved. And make effective use of the cab space.

As a result, a degree of freedom can be obtained in the manner of mounting the above-mentioned devices or elements in the cab, and the visibility of the display and the operability of operating devices such as switches are improved.

According to the second aspect of the present invention, a vehicle load such as a shackle pin or a trunnion shaft is mounted on a member that receives the weight of the vehicle, and the vehicle load such as the total weight is detected. In a vehicle load measuring device, a display device for selectively displaying a load of a vehicle, a total weight, etc., as well as other displays (hereinafter referred to as an operating condition display), and for each of the selection displays. Storage means for respectively storing the load and the operating state information, which are the immediately preceding display contents, and a load or operating state or the like from the storage means or controller based on a vehicle speed signal and / or a signal from the load display changeover switch. It is characterized in that the information of (1) is taken in, and the display device can be selectively and appropriately switched and displayed.

According to the above technical means, in addition to the operation described in claim 1, the contents of the immediately preceding display state are always stored in the storage means, and the information such as the immediately preceding load or operating state is displayed every time the display is switched. Therefore, the continuity of information can be obtained, which is preferable.

According to the invention described in claim 3, when the vehicle speed signal is changed to the vehicle running state, the load display is switched to the display of the driving state and the like. Further, according to the invention of claim 4, the vehicle speed is changed. The present invention specifies the invention according to claim 2 so that the contents of the load display are taken into the storage means at the time of shifting to the vehicle traveling state by a signal and the display device is switched from the load display to the driving state display.

According to the fifth aspect of the invention, the load is displayed on the display device by the AND of the load display switch ON and the vehicle speed signal.

Therefore, according to the technical means, even if the load display switch is accidentally turned on during traveling, the safety is improved without changing from the operating state to the load display.

According to the sixth aspect of the invention, the starter switch is turned on to display the operating state without displaying the load, and the load display switch is turned on to switch from the operating state display to the load display. The present invention is characterized in that the load display is switched to a display such as a driving state at the time of shifting to a vehicle traveling state by a signal.

That is, the starter switch is turned on even when the operation is stopped.
At that time, since the driving state and the like are displayed, it can be determined whether or not the driving state is normal, and the vehicle can be driven as it is. In other words, the load display does not always have to be performed at the time of starting the operation, and the load display switch may be turned on only when it is necessary. Therefore, the driving operability is not reduced.

Therefore, according to such a technical means, when the starter switch is turned on, the load measurement display system is turned on, but the system is in an operable state but the load is not displayed, and the load display switch is turned on. By doing so, the controller causes the display device to display the load amount for the first time.

When the vehicle starts to run, the controller receives the vehicle speed signal (vehicle speed V> 0) from the vehicle speed sensor, causes the controller to erase the display of the load amount, and causes the load amount storage device to store the load amount. As a result, while the vehicle is traveling, the display device displays a display such as a multiple display such as a driving state necessary for traveling of the vehicle. If it is turned on, the load capacity can be displayed at any time.

As described above, according to the present invention, the display of the load amount is automatically erased while the vehicle is traveling,
There is no need for the complicated operation of turning off the power supply each time and erasing the display of the loading amount, unlike the conventional one. Further, since the information such as the load is always stored in the storage means, the load amount can be immediately displayed by turning on the load amount display switch while the vehicle is stopped.

[0035]

Embodiments of the present invention will be described below with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, coupling modes, etc. of the components or elements described in this embodiment are not intended to limit the scope of the present invention thereto. No, it is merely an example of explanation.

FIG. 1 shows an embodiment (first embodiment) according to the first invention of the present invention. In FIG. 1, the vehicle load detection signals from the load sensors 7a (shackle pin side) and 7b (trunnion shaft side) are the amplifier 4
It is amplified by a and 41b and input to the controller 100. Reference numeral 46 is a reset switch for "0" (zero) reset, and 61 is a display switch. When an ON-OFF input from the switch 61 is input to the controller 100, the controller 100 receives the ON-OFF input and the display device 42 receives it.
The display of is changed to the load display or multiple display. The reset switch 46 and the display switch may both be configured to display on the display in the display device 42.

Reference numeral 42 denotes a display device, which is configured to be capable of displaying both vehicle load display such as vehicle load capacity and total weight, and multiple display for displaying various driving information. It should be noted that the controller 100 may be configured to receive signals from various sensors for grasping an operating state, and further to input a brake engagement / disengagement signal as necessary in order to grasp an operation stop state. Good. Further, the display device 42 is configured to display various operating states by the multiplex device changeover switch 71.

In the vehicle load measurement and display device shown in FIG. 1, when the deviation from the sensor characteristics of the sensors 7a and 7b is calibrated, the reset switch 46 is turned on when there is no load (load capacity = “0”). Then, the load amount displayed on the display device 42 is set to "0" (zero), and the outputs of the sensors 7a and 7b are calibrated.

When the vehicle is stopped (vehicle speed V = 0),
By turning on the start switch (not shown),
Various driving states required when the vehicle is started are displayed. Further, at this time, the vehicle load measurement is in the operation start state, and by turning on the display switch 61 in this state, the controller 100 receives the switching signal and measures the vehicle load and displays it on the display device 42. Display the loading capacity. At this time, the display switch 61 can be switched between two types of display, that is, the loaded amount display and the total weight display of the vehicle.
If necessary, it is possible to display only the total weight.

When the vehicle starts running, a vehicle speed (V> 0) detection signal is input from the vehicle speed sensor 45 to the controller 100, and the controller 100 receives the signal and displays the load on the display device 42. The operating state before switching is displayed, and the multiple display switching switch 71 enables multiple display of various operating states. Further, the display switch 61 does not operate while the vehicle is traveling (V> 0) in response to a brake signal 72A when the vehicle is stopped or a signal from the vehicle speed sensor 45, and the display switch 61 is turned on during traveling. However, the display cannot be switched to the load display (or gross weight display).

As described above, in this embodiment, since the load can be displayed only when the display switch 61 is operated when the vehicle is stopped, the operation of the present invention described above is obtained, and the display switch 61 and the reset switch are also provided. Since the switches for displaying the load such as 46, the display device 42 and the controller 100 are provided separately, they can be easily provided in a mode having the best operability and visibility.

2 to 3 show a vehicle load measuring and displaying apparatus according to another embodiment of the present invention. The detection signal of the vehicle load by the load sensors 7a and 7b is sent to the amplifier 41.
The steps input to the controller 100 via a and 41b are the same as those in the first embodiment shown in FIG.

Reference numeral 62 is a starter switch. By turning on this switch, the controller 100 side starts measurement of vehicle load and driving condition. Reference numeral 42 denotes a display device, which is similar to that of the first embodiment, and is configured to display a vehicle load such as a loaded amount and a total weight of the vehicle and multiple display so that various operation items can be switched.

Reference numeral 63 is a load display switch. When this switch is turned on and input to the controller 100,
Only when the vehicle speed signal from the vehicle speed sensor is "0", the display of the display device 42 is changed to the load amount display. Further, the controller 100 has a storage means 102A for receiving various sensor outputs and storing various operating states (various sensor outputs), and an ON-OF of a load amount display switch.
Storage means 102B for storing the load display displayed on the display device 42 in response to the travel start signal in the F signal or the vehicle speed signal are provided respectively.

FIG. 3 shows the operation procedure of the embodiment shown in FIG. 2, in which the current sensor output in the operating state (the initial operating state) is displayed after the starter switch 62 is turned on when the vehicle is stopped. It is displayed on the device 42 (S1) and it is judged from the vehicle speed sensor 45 whether V (vehicle speed) = 0 km. (S2) Hereinafter, the above state is repeated until the vehicle speed signal is V = 0 and the display switch 63 is turned on. (S3) At this time, the load is measured at the same time.

Here, the load display switch 63 is turned ON-O.
By setting to FF, the central control unit 101 of the controller 100 receives the switching signal and switches the load amount to the load display on the display device 42. (S5) At this time, the operation state storage means 102A receives signals from various sensors so that the latest operation state data is stored.

Then, in the case of an empty load, it is confirmed whether or not the display section shows "0" (S7). If not, "0" is reset by the reset switch (S).
8) Display the loading capacity such as loading and unloading of luggage. (S
9) When the display is "0", the loading amount such as loading and unloading of luggage is displayed as it is. (S9)

When the vehicle starts traveling, a detection signal of vehicle speed (V> 0) is input from the vehicle speed sensor 45 (S10), and the central control unit 101 stores the loading amount in the loading amount storage means 102B (S11). At the same time, the display of the loading amount on the display device 42 is erased and switched to the display of the operating state. (S
2)

Then, the display device 42 displays the operating information such as the total traveled distance and the battery voltage selected by the multiple display changeover switch.

As described above, according to the present embodiment, when the vehicle starts traveling and the display of the load amount becomes unnecessary, the load amount display is automatically erased from the display device 42, and the driving information necessary during the running is obtained. The display is switched to a multiple display, and the operation such as the conventional one, in which the power supply is turned off every time the vehicle is started to erase the load display, and the operation is likely to occur, becomes difficult.

Further, since the detected value of the load amount is stored in the load amount storage device 102 even while the vehicle is traveling,
In response to the brake signal or the vehicle speed signal, the operation stop signal and the load amount display switch 63ON are ANDed, and the load amount can be promptly displayed at the time of stop.

[0052]

The present invention is configured as described above.
According to the present invention, the load amount display and the multiple display can be displayed on one display device 42, and the display content of the display device 42 can be changed only by switching the display switch, so that the switches and the controller can be displayed. The display device 42 can be easily installed separately. As a result, the degree of freedom in mounting the operating devices such as switches and the display device is maintained, and the operability and visibility are significantly improved.

Further, according to the present invention, the display of the load amount is automatically switched to the display of the operating state while the vehicle is traveling, and the display of the load amount is erased by turning off the power supply each time like the conventional one. The complicated operation becomes unnecessary, and the operability is improved.

Further, since the loaded amount is always stored in the loaded amount storage device, if the loaded amount display switch is turned on while the vehicle is stopped, the loaded amount can be displayed at any time, and the handleability is improved.

Further, by combining the load amount display switch and the load amount storage device, the display device, the load amount display and the operating state display can be displayed in a multiple manner, so that the display device can be made common and simplified, and the cost can be reduced. Becomes

[Brief description of the drawings]

FIG. 1 is a block diagram of a vehicle load measuring apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a vehicle load measurement display device according to a second embodiment of the present invention.

FIG. 3 is a flowchart in the second embodiment.

FIG. 4 is a configuration diagram of a vehicle load measuring device in a large truck.

FIG. 5 is a sectional view showing a mounting portion of a vehicle load detection drunk sensor in a large truck.

FIG. 6 is a block diagram showing a first example of a conventional vehicle load measurement and display device.

FIG. 7 is a block diagram showing a second example of a conventional vehicle load measurement and display device.

FIG. 8 is a flowchart in the second example.

[Explanation of symbols]

 7a, 7b Load sensor 42 Display device 45 Vehicle speed sensor 46 Reset switch 53a, 53b Electric harness 61 Display switch 62 Starter switch 63 Loading amount display switch 100 Controller 101 Central control unit 102A Operating state storage device 102B Loading amount Storage device

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[Procedure amendment]

[Submission date] July 9, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

[0022]

SUMMARY OF THE INVENTION The present invention is to solve the above problems, and the invention according to claim 1 receives the weight of a vehicle.
In a vehicle load measuring device configured to detect a vehicle load such as a vehicle load amount and a total weight by a sensor attached to a member , a load display such as a vehicle load amount and a total weight is displayed together with a driving state and other A control unit for selectively displaying another display (hereinafter referred to as an operating state display) on a display device based on a predetermined signal, and displaying the display contents of the load display and the operating state display as a vehicle speed signal or / and The present invention is characterized in that it can be selectively and appropriately switched based on a signal from the load display changeover switch.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction contents]

According to the invention of claim 2, the weight of the vehicle is increased.
A vehicle load measuring device configured to detect a vehicle load such as a vehicle load and a total weight by a sensor attached to a member that receives the amount A display device for selectively displaying the status and other displays (hereinafter referred to as operating status display),
Storage means for storing information on the load and the operating state, which is the display content immediately before each selection display, and a storage means or a controller based on a vehicle speed signal or / and a signal from the load display changeover switch. The present invention is characterized in that information such as a load or an operating state is taken in, and the display device can be selectively and appropriately switched and displayed.

Claims (6)

[Claims] 1. A vehicle load measuring device configured to detect a vehicle load such as a load capacity and a total weight of a vehicle by a sensor attached to a member that receives the weight of the vehicle such as a shackle pin and a trunnion shaft, A load unit such as a load capacity of the vehicle, a total weight, and the like, and a control unit for selectively displaying a driving state and other displays (hereinafter referred to as a driving state display) on a display device based on a predetermined signal. A load measuring device for a vehicle, characterized in that display contents such as a display and a driving state display can be appropriately and selectively switched based on a vehicle speed signal and / or a signal from a load display changeover switch. 2. A vehicle load measuring device configured to detect a vehicle load such as a load capacity and a total weight of the vehicle by a sensor attached to a member that receives the weight of the vehicle, such as a shackle pin and a trunnion shaft, A display device for selectively displaying the load status of the vehicle, the total weight, and the like, as well as the operating status and other displays (hereinafter referred to as the operating status display), and the display content immediately before each selection display. A display device for storing information such as a load and a driving state, and storing information such as a load or a driving state from the storage unit or the controller based on a vehicle speed signal and / or a signal from the load display changeover switch. A vehicle load measurement and display device characterized in that it can be selectively and appropriately displayed on the display. 3. The load measuring device for a vehicle according to claim 1, wherein the load display is switched to a driving state display when the vehicle travels to a vehicle traveling state according to a vehicle speed signal. 4. The vehicle according to claim 2, wherein the load display content is taken into the storage means when the vehicle travels to the vehicle traveling state by the vehicle speed signal, and the display device is switched from the load display to the operating state display. Load measuring device. 5. The load measuring device for a vehicle according to claim 1, wherein the load is displayed on the display device by ANDing the load display switch ON and the vehicle stop state based on the vehicle speed signal or the brake signal. . 6. The starter switch is turned on to display the operating state and the like without displaying the load, the load display switch is turned on to switch from the operating state display to the load display, and when the vehicle speed signal changes to the vehicle running state. The load measuring apparatus for a vehicle according to claim 1 or 2, wherein the load display is switched to a driving state display.