CN2078244U - Loading capacity balance indicator alarm for vehicle - Google Patents
Loading capacity balance indicator alarm for vehicle Download PDFInfo
- Publication number
- CN2078244U CN2078244U CN 90209559 CN90209559U CN2078244U CN 2078244 U CN2078244 U CN 2078244U CN 90209559 CN90209559 CN 90209559 CN 90209559 U CN90209559 U CN 90209559U CN 2078244 U CN2078244 U CN 2078244U
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- CN
- China
- Prior art keywords
- vehicle
- balance indicator
- indicator alarm
- direct current
- bridge
- Prior art date
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Abstract
The utility model discloses a loading capacity balance indicator alarm for a vehicle, which is an instrument composed of an electric resistance strain gauge and an integrated electronic component and is used for balance indicator and alarm for vehicle capacity. The utility model uses the ' the principle and technology of the electrical resistance strain gage ' to convert the excursion of capacity created on a vehicle to an electrical signal, and after the signal is enlarged and processed, the indicator indicates the unbalance degree of the excursion of centre of gravity of the cargo on the vehicle. When the unbalance degree exceeds the allowable value, the sound and light signals can be sent off to remind the vehicle drive people of attention. The utility model provides a scientific monitoring method for safe driving of vehicles for vehicle driving and vehicle monitoring people, improves driving safety, and is especially important in transporting operation of large cargoes.
Description
The utility model belongs to the electrical application technology field.
As everyone knows, large-scale or heavy load vehicle is attached great importance to the balance requirement of cargo loading, because this has very important vital function in traffic safety.Up to now, only dependence experience of cargo loading back balance situation is estimated roughly or is judged, do not have instrument to realize quantitative target.Vehicle owing to reasons such as top ripple, vibration tend to make goods center of gravity generation shift phenomenon, loses and adorns 4 o'clock state of equilibrium in the way of travelling, and takes the adjustment measure as untimely, continues to travel, and will definitely cause serious consequence.
The purpose of this utility model provides a kind ofly to be utilized resistance strain gage to come its load-bearing steel plate produces behind the measuring vehicle lade the corresponding STRESS VARIATION that causes of flexural deformation to indicate goods to load back balance whether instrument on vehicle in good time.
This instrument is mainly by DC regulated power supply, the direct current bridge of detection signal, and signal amplification circuit shows and warning circuit five major parts are formed.Its basic functional principle is to utilize " resistance-strain principle and technology ", and the direct current bridge of being made up of resistance strain gage converts load carrying ability to signal.Then signal conditioning is amplified, demonstrate the overbalance degree with display instrument again, this instrument adopts the analog meter of " zero center ".The pointer nulling, the expression complete equilibrium; The pointed side represents that promptly certain lateral deviation is heavy; Pointer offset is big more, shows that the overbalance degree is big more, and when having arrived the limit, instrument promptly sends sound and optic signal, and reminds people is noted.Automobile battery provides electric bridge working power E through after the voltage stabilizing to electric bridge, and two semi-bridge type resistance strain gages stick on main holding on the steel plate B about vehicle bat portion respectively.When goods installed on the car, the weight P of goods made the main load-bearing steel plate of vehicle produce flexural deformation, and two semi-bridge type resistance strain gages that stick on the main load-bearing steel plate have produced corresponding strain.And produced the output electric signal U that is directly proportional with cargo weight accordingly by the direct current bridge that strain-gauge is formed
0This U
0After amplifying circuit amplifies, indicate degrees of offset by test indicator (analog meter of zero center).Because the electric bridge that two semi-bridge type resistance strain gages are connected into is symmetry fully, so main load-bearing steel plate produces unequal flexural deformation (corresponding this moment, the center of gravity of goods had skew) electric bridge output signal is just arranged about having only lade to go to the back to make to the vehicle.If load balance very, main load-bearing steel plate stress equalization about making, then electric bridge will be output as zero-signal, corresponding instrument indication this moment also is zero, so represent balance.Obviously, if load overbalance very, when having arrived limiting case (do not allow occur overbalance degree), just to send sound, visual alarm by warning circuit, thereby attract much attention.Because the temperature of environment always changes when measuring, the electric resistance humidity effect (resistance wiry changes with variation of temperature) that this variation certainly leads to the resistance strain gage sensitive grid with and different with the hard ware linear expansion factor, its resistance is changed, thereby cause measured error.For this reason, must manage to take measures to eliminate this influence.In the utility model, promptly utilize the transverse strain sheet R of semi-bridge type resistance strain gage to realize temperature compensating, to improve survey precision.In addition, when vehicle is in zero load fully (main load-bearing steel plate bending distortion should be identical about this moment), electric bridge still might be exported non-vanishing, and this signal is after amplifying, and indicating instrument will indicate vehicle that overbalance is just arranged when not loading, and obviously not meet reality.In order to make vehicle should be zero indication (expression balance) when the zero load mutually, so a zeroing circuit is set on electric bridge.When lade, along with vehicle master load-bearing steel plate produces flexural deformation, the output terminals A of electric bridge, C should have output signal U mutually
0:
U
0＝ 1/4 EK（ε
1－ε
2）
-----electric bridge power supply voltage (V) in the formula: E;
The sensitivity coefficient of K-----resistance strain gage;
ε
1, ε
2-----be respectively strain of answering sheet in the longitudinal strain sheet in the semi-bridge type resistance strain gage.
We see U from above-mentioned formula
0With (ε
1-ε
2) be directly proportional, obviously with " vehicle capacity display alarm instrument " in situation opposite fully.Therefore, when the cargo loading balance on the vehicle, the identical then ε of the flexural deformation of left main load-bearing steel plate
1=ε
2So, output signal U
0=0.Otherwise,, then must make the flexural deformation difference of left and right main load-bearing steel plate, i.e. ε as if cargo-carring overbalance
1≠ ε
2, so U
0≠ 0, after amplifying circuit amplified, indicating instrument had just had the skew indication.
This instrument is directly installed in the operator's compartment of vehicle, chaufeur not only can be behind loading cargo-carring as can be known immediately balanced degree, and can be in the vehicle ' way, needn't stop and can monitor at any time whether the center of gravity of cargo-carring equipoise on the car is in state of equilibrium, if the goods center of gravity is offset because of certain reason, instrument has indication immediately; When if skew has exceeded tolerance level, instrument sends sound, visual alarm immediately, causes that carrying navigating mate notes, in time stops and takes necessary adjustment measure, thereby can avoid the generation of substantial risk accident.
Communications and transportation cause growing, in the large cargo transportation of large-scale and heavy-duty vehicle, the cargo-carring onboard balance of goods seems more and more important to safe driving.The utility model provides a kind of angles of science monitoring means for the navigating mate of these vehicles, whether make them can observe easily, very in time whenever and wherever possible serious skew takes place cargo-carring goods center of gravity on the car, for improving traffic safety, it is significant to increase work efficiency.
Fig. 1 is a vehicle capacity balance indicator alarm work block diagram.Direct current bridge R, signal amplification circuit W by DC regulated power supply DW, detection signal
3, read out instrument W
4, warning circuit W
5Form.
Fig. 2 is a semi-bridge type resistance strain gage structural representation.By transverse strain sheet Rc, longitudinal strain sheet Rx, substrate M, connection terminal L constitutes.
Fig. 3 is the direct current bridge scheme circuit that two semi-bridge type resistance strain gages constitute.Its two transverse strain sheet RC
1, RC
2Be arranged in the same side, bridge power supply E is supplied with after voltage stabilizing by automotive battery.
Fig. 4 is that the semi-bridge type resistance strain gage is pasted signal and A portion enlarged drawing.
Fig. 5 is a vehicle capacity balance indicator alarm electrical schematic diagram.
Automobile battery inserts this instrument through K switch.Voltage fluctuation is very big in use owing to automotive battery, therefore can not be directly as the working power of instrument.So this instrument has adopted three terminal regulator IC
1, integrated operational amplifier IC
2, transistor T, stabilivolt DW, capacitor C
1～C
6, resistance R
1～R
4Form secondary voltage stabilizing link, improved the precision of voltage regulation greatly, and suppressed the extraneous interference signal, for this instrument provides stable, failure-free working power.Because the signal of this instrument amplifies and the overload alarm circuit all needs to provide dual power supply to work, and automobile battery still is a single supply after voltage stabilizing, therefore, has adopted integrated operational amplifier IC among Fig. 5
3, transistor T
2T
3, potential device W
1, capacitor C
1～C
9, resistance R
5～R
8, will convert symmetrical positive and negative dual power supply to through the single power supply after the voltage stabilizing.Signal passes through RX
1, RC
1, RX
2, RC
2The direct current bridge of forming leads to indication balance instrument again through the amplifier amplification.Because the half-bridge resistance strain gage during fabrication, can not be done just the samely, electric bridge still might be exported non-vanishing when this just made vehicle unloaded.Added zero potentiometer W for this reason
2And resistance R
9, carry out the zero load zeroing.Amplifying circuit has adopted a kind of " ultralow drift chopper-zero-stabilized monolithic integrated circuit " IC
4Be used as the amplification of direct current signal.Its magnification factor can be by W
3Regulate, the signal after amplifying is by IC
410 pin output, the indicating instrument that connects " zero center " herein can have been indicated balanced degree.Owing to adopt the indicating instrument of zero center, thus according to the pointer offset direction just can conclude the goods center of gravity be partial to which side to.Can regulate W as required
4Come the deflection amplitude of regulation meter.Warning circuit is by W
5, R
14～R
18, IC
5, IC
6, LED L, LEDH, buzzer phone FM form.Wherein W, and R
14～R
17And IC
5, IC
6Formed " window comparator ".The warning circuit principle of work is: work as IC
4Output amplitude (corresponding this moment deviant allow) when specialized range, IC
5, IC
6All export high level, LEDL and LEDH are reversed and end, and therefore noiseless, optical signal shows that this moment is normal for loading.Work as IC
4Amplitude when surpassing a certain scope, (load overbalance, cause the goods center of gravity to produce serious skew to the left or to the right), then IC
5Or IC
6Must there be one to be output as low level, a forward conduction must be arranged, T among LEDL and the LEDH
4Also saturation conduction, FM sounds, and sound occurred, light is reported to the police simultaneously, thereby comes into the picture, and in time takes corresponding adjustment measure, until sound, light alarm release.
The electric bridge of this instrument, demonstration and warning part can be made vehicle capacity display alarm instrument through repacking.
Claims (5)
1, the vehicle capacity indicator alarm is by DC regulated power supply DW, detection signal direct current bridge R, signal amplifier W
3, display circuit W
4, warning circuit W
5Five parts are formed, of the present utility model being characterised in that:
1) DC regulated power supply DW is by two utmost point voltage stabilizings, and positive and negative symmetric double power supply constitutes;
2) the direct current bridge R of detection signal is by two semi-bridge type resistance strain gage R
X1, R
X2, R
C1, R
C2Be divided into both sides and connect and compose, stick on respectively on the left and right main load-bearing steel plate of vehicle rear;
2, vehicle capacity balance indicator alarm according to claim 1 is characterized in that, two semi-bridge type resistance strain gages of direct current bridge R are respectively by substrate M connection terminal L, longitudinal strain sheet Rx, and temperature compensating transverse strain sheet Rc constitutes.
3, vehicle capacity balance indicator alarm according to claim 2 is characterized in that being provided with on the direct current bridge R a unloaded zero potentiometer W
2
4, vehicle capacity balance indicator alarm according to claim 1 is characterized in that amplifier W
3Adopted " ultralow drift chopper-zero-stabilized monolithic integrated operational amplifier " IC
4Circuit.
5, vehicle capacity balance indicator alarm according to claim 1 is characterized in that warning circuit by " window comparator ", LED L, and LEDH, buzzer FM forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90209559 CN2078244U (en) | 1990-06-27 | 1990-06-27 | Loading capacity balance indicator alarm for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90209559 CN2078244U (en) | 1990-06-27 | 1990-06-27 | Loading capacity balance indicator alarm for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2078244U true CN2078244U (en) | 1991-06-05 |
Family
ID=4889608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90209559 Withdrawn CN2078244U (en) | 1990-06-27 | 1990-06-27 | Loading capacity balance indicator alarm for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2078244U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108045549A (en) * | 2017-12-31 | 2018-05-18 | 上海牧羽航空科技有限公司 | A kind of tiltrotor with separable function pod |
| CN108297788A (en) * | 2017-01-12 | 2018-07-20 | 福特全球技术公司 | Vehicle load indicator |
| CN114783182A (en) * | 2022-04-14 | 2022-07-22 | 图为信息科技(深圳)有限公司 | Vehicle monitoring method and system based on edge calculation |
-
1990
- 1990-06-27 CN CN 90209559 patent/CN2078244U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108297788A (en) * | 2017-01-12 | 2018-07-20 | 福特全球技术公司 | Vehicle load indicator |
| CN108297788B (en) * | 2017-01-12 | 2022-03-22 | 福特全球技术公司 | Vehicle load indicator |
| CN108045549A (en) * | 2017-12-31 | 2018-05-18 | 上海牧羽航空科技有限公司 | A kind of tiltrotor with separable function pod |
| CN114783182A (en) * | 2022-04-14 | 2022-07-22 | 图为信息科技(深圳)有限公司 | Vehicle monitoring method and system based on edge calculation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |