CN202024756U - Vehicle-mounted elevation monitoring device - Google Patents
Vehicle-mounted elevation monitoring device Download PDFInfo
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- CN202024756U CN202024756U CN2011200468954U CN201120046895U CN202024756U CN 202024756 U CN202024756 U CN 202024756U CN 2011200468954 U CN2011200468954 U CN 2011200468954U CN 201120046895 U CN201120046895 U CN 201120046895U CN 202024756 U CN202024756 U CN 202024756U
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Abstract
The utility model provides a vehicle-mounted elevation monitoring device, which includes a sensor module, a central control module, a power supply module and a display module, wherein the sensor module is used for collecting air pressure and temperature signals of a position where the vehicle is located; the central control module is connected to the sensor module, and used for performing temperature compensation to the temperature sensors and filter treatment to the air pressure signals, as well as calculating relative elevation value where the vehicle is located; the power supply module is connected to the central control module and used for supplying electricity for the device; and the display module is connected to the central control module and used for displaying the relative elevation value where the vehicle is located. The vehicle-mounted elevation monitoring device provided by the utility model has high accuracy and sensitivity, intellectualization, simple structure, low cost and small volume.
Description
[technical field]
The utility model relates to technical field of automotive electronics, especially relates to a kind of vehicle-mounted height above sea level monitoring device.
[background technology]
In recent years, domestic sale of automobile sustainable growth, in all automobiles segmented market, the performance that surely belongs to the SUV product was the most noticeable, and in whole SUV market, the city SUV that takes into account comfortableness and cross-country ability has been the absolute leading role in whole SUV market.In a lot of occasions; cross-country jeep or above-mentioned city SUV usually can travel and differ bigger area at high height above sea level or vertical physical features; information such as residing relative sea level elevation, direction have considerable meaning when understanding vehicle ' in real time in this process concerning the driver.
Existing altitudinal instrument to be adopted mechanically, has that sensitivity is low, error is big, failure rate is high and shows not defective intuitively, and need other configuration guide pin come direction indication, very inconvenient.
[utility model content]
Based on this, be necessary to provide a kind of height above sea level monitoring result accuracy and highly sensitive, intelligent and vehicle-mounted height above sea level monitoring device simple in structure.
A kind of vehicle-mounted height above sea level monitoring device comprises:
Be used for the air pressure of collection vehicle present position and the sensor assembly of temperature signal;
Be connected in described sensor assembly, be used for described temperature signal is carried out temperature compensation and described air pressure signal is carried out Filtering Processing, calculate the central control module of the relative sea level elevation value of vehicle present position;
Be connected in described central control module, be used for power module described device power supply; And
Be connected in described central control module, be used to show the display module of the relative sea level elevation value of vehicle present position.
Preferably, described device also comprises and is connected in described central control module, is used for being met when the preset trigger condition, the alarm module of passengers inside the car being pointed out by sound and light alarm.
Preferably, described device also comprises A/D sampling module and the communication module that is connected in described central control module.
Preferably, described sensor assembly further comprises the temperature sensing submodule that is used for collection vehicle present position temperature and is used for the air pressure sensing submodule of collection vehicle present position air pressure.
Preferably, described central control module further comprises:
Be connected in described temperature sensing submodule, be used for the nonlinear temperature signal of temperature sensing submodule input is carried out the temperature compensation submodule that temperature compensation is calculated;
Be connected in described air pressure sensing submodule, be used for the atmospheric pressure value of air pressure sensing submodule input is carried out the air pressure filtering submodule of digital filtering; And be used for the atmospheric pressure value after the described air pressure filtering submodule processing is calculated the sea level elevation calculating sub module of relative sea level elevation according to pressure-height above sea level conversion formula.
Preferably, described air pressure filtering submodule filtering mode is a low-pass digital filter.
Preferably, the model of described central control module is the microprocessor μ PD78F0402 of NEC Corporation, and the model of described sensor assembly is the MS5541C chip of Intersema company.
The vehicle-mounted height above sea level monitoring device of the utility model is by the temperature and the air pressure of sensor assembly collection vehicle present position, by microprocessor the data of gathering are carried out temperature compensation and air pressure filtering, calculate relative sea level elevation and, realized real-time monitoring according to pressure-height above sea level conversion formula at last relative sea level elevation by the LCD demonstration.In addition, the vehicle-mounted height above sea level monitoring device of the utility model also is provided with sound and light of alarm, when some trigger condition is met, can by sound and light alarm on the car member point out, so the accuracy of the vehicle-mounted height above sea level monitoring device of the utility model and highly sensitive, intelligent and simple in structure, cost is low, volume is little.
[description of drawings]
Fig. 1 is the structural representation of the vehicle-mounted height above sea level monitoring device of the utility model preferred embodiment;
[embodiment]
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The vehicle-mounted height above sea level monitoring device of the utility model comprises the air pressure that is used for the collection vehicle present position and the sensor assembly of temperature signal; Be connected in described sensor assembly, be used for described temperature signal is carried out temperature compensation and described air pressure signal is carried out Filtering Processing, calculate the central control module of the relative sea level elevation value of vehicle present position; Be connected in described central control module, be used for power module described device power supply; And be connected in described central control module, be used to show the display module of the relative sea level elevation value of vehicle present position.
See also Fig. 1, Fig. 1 is the structural representation of the vehicle-mounted height above sea level monitoring device of the utility model preferred embodiment.The vehicle-mounted height above sea level monitoring device that the utility model provides comprises central control module 1, is connected to sensor assembly 2, power module 3 and the display module 4 of central control module 1, described sensor assembly 2 is used for the air pressure and the temperature signal of collection vehicle present position and is input to central control module 1, central control module 1 is used for respectively described temperature signal being carried out temperature compensation and described air pressure signal being carried out Filtering Processing, calculate the relative sea level elevation value of vehicle present position, and show by display module 4.Power module 3 is used for the power supply to described vehicle-mounted height above sea level monitoring device.
As an embodiment of the present utility model, vehicle-mounted height above sea level monitoring device of the present utility model also comprises A/D sampling module 5, communication module 6 and the alarm module 7 that is connected in central control module 1.Wherein, alarm module 7 is used for being met when the preset trigger condition, and for example the sea level elevation value reaches warning value relatively, by sound and light alarm passengers inside the car is pointed out.
As an embodiment of the present utility model, sensor assembly 2 further comprises temperature sensing submodule 22 and air pressure sensing submodule 24, is respectively applied for the temperature and the air pressure of collection vehicle present position.Central control module 1 further comprises temperature compensation submodule 12, air pressure filtering submodule 14 and is connected in the sea level elevation calculating sub module 16 of air pressure filtering submodule 14.
Wherein, temperature compensation submodule 12 is connected in temperature sensing submodule 22, be used for nonlinear temperature signal to temperature sensing submodule 22 input and carry out temperature compensation and calculate,, calculate through temperature compensation and can obtain the precise dose value according to having nonlinear relationship between height above sea level and environment, the pressure.The atmospheric pressure value precision that the height above sea level of vehicle-mounted height above sea level monitoring device of the present utility model calculates is not more than 0.1mbar (100Pa=1mba), and the temperature value precision is not more than 0.1 ℃.
Air pressure filtering submodule 14 is connected in air pressure sensing submodule 24, is used for the atmospheric pressure value of air pressure sensing submodule 24 inputs is carried out digital filtering, to obtain more accurate atmospheric pressure value.Adopt low-pass digital filter mode (seeing formula 1) in the present embodiment:
y
n＝y
n-1*(1-k)+x*k (1)
Wherein: x is a pressure gauge numerical value, and y is filtered force value, and k is an amplification coefficient
Sea level elevation calculating sub module 16 is utilized the atmospheric pressure value after air pressure filtering submodule 14 is handled, and calculates relative sea level elevation according to pressure-height above sea level conversion formula.Present embodiment be according to U.S.'s air pressure standard 1979 the pressure that provides-height above sea level conversion formula (seeing formula 2):
But formula (2) is a nonlinear equation, and its calculating has proposed very high requirement to microprocessor, needs microprocessor to possess more figure place and Floating-point Computation function.
In order to realize the calculating of height value h, Intersema company has carried out the piece-wise linearization processing to formula (2), thereby obtains accurately relative sea level elevation h.
As an embodiment of the present utility model, described central control module 1 adopts the microprocessor μ PD78F0402 of NEC Corporation, the MS5541C sensor chip that sensor 2 adopts Intersema company to produce, the relative sea level elevation and the temperature information of collection vehicle present position in real time, it is built-in with little power interface IC, comprise 16 A/D convertor circuits, digital filter circuit, functions such as PROM, the pressure and temperature digital signal of its output can directly be sent into microprocessor μ PD78F0402 through the asynchronous serial communication mode, obtain high-precision height above sea level signal through over-compensation and after calculating, show in real time by the LCD display circuit.
Wherein, done filtering and AD conversion in MS5541C inside by air pressure and temperature signal that sensor 2 records, microprocessor μ PD78F0402 is sent into through serial communication mode in digitized air pressure signal D1 of gained and temperature signal D2 and calibration data WORD1～4.
The high integration of MS5541C sensor assembly has not only reduced the interference of outer bound pair system, has improved the degree of accuracy of pressure and temperature signal simultaneously and has reduced the hardware cost of system.When some trigger condition is met, can point out member on the car by sound and light alarm.And described μ PD78F0402 microprocessor internal carries the liquid crystal display driver module, produces sequential control by driver module and drives 4 common ports, 1/4 multiplexing LCD panel.
The vehicle-mounted height above sea level monitoring device of the utility model has reached designing requirement fully through the actual environment test.Test result sees also the actual sea level elevation relatively and the measurement sea level elevation table of comparisons of table 1.
The actual sea level elevation relatively of table 1 and the measurement sea level elevation table of comparisons
In addition after tested, when actual height above sea level calculates the relative sea level elevation value of gained maximum deviation in ± 5m through following formula during at-700～9000m, when actual height above sea level calculates the relative sea level elevation value of gained maximum deviation in ± 10m through following formula during at 9000～16000m, the visible vehicle-mounted height above sea level monitoring device of the utility model has been realized the accurate detection to relative sea level elevation.
Than prior art, the vehicle-mounted height above sea level monitoring device of the utility model is by the temperature and the air pressure of sensor assembly collection vehicle present position, by microprocessor the data of gathering are carried out temperature compensation and air pressure filtering, calculate relative sea level elevation and, realized real-time monitoring according to pressure-height above sea level conversion formula at last relative sea level elevation by the LCD demonstration.In addition, the vehicle-mounted height above sea level monitoring device of the utility model also is provided with sound and light of alarm, when some trigger condition is met, can by sound and light alarm on the car member point out, so the accuracy of the vehicle-mounted height above sea level monitoring device of the utility model and highly sensitive, intelligent and simple in structure, cost is low, volume is little.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (7)
1. a vehicle-mounted height above sea level monitoring device is characterized in that, comprising:
Be used for the air pressure of collection vehicle present position and the sensor assembly of temperature signal;
Be connected in described sensor assembly, be used for described temperature signal is carried out temperature compensation and described air pressure signal is carried out Filtering Processing, calculate the central control module of the relative sea level elevation value of vehicle present position;
Be connected in described central control module, be used for power module described device power supply; And
Be connected in described central control module, be used to show the display module of the relative sea level elevation value of vehicle present position.
2. vehicle-mounted according to claim 1 height above sea level monitoring device is characterized in that, described device also comprises and be connected in described central control module, be used for being met when the preset trigger condition, the alarm module of passengers inside the car being pointed out by sound and light alarm.
3. vehicle-mounted as claimed in claim 1 or 2 height above sea level monitoring device is characterized in that described device also comprises A/D sampling module and the communication module that is connected in described central control module.
4. vehicle-mounted according to claim 1 height above sea level monitoring device is characterized in that, described sensor assembly further comprises the temperature sensing submodule that is used for collection vehicle present position temperature and is used for the air pressure sensing submodule of collection vehicle present position air pressure.
5. as vehicle-mounted height above sea level monitoring device as described in the claim 4, it is characterized in that described central control module further comprises:
Be connected in described temperature sensing submodule, be used for the nonlinear temperature signal of temperature sensing submodule input is carried out the temperature compensation submodule that temperature compensation is calculated;
Be connected in described air pressure sensing submodule, be used for the atmospheric pressure value of air pressure sensing submodule input is carried out the air pressure filtering submodule of digital filtering; And be used for the atmospheric pressure value after the described air pressure filtering submodule processing is calculated the sea level elevation calculating sub module of relative sea level elevation according to pressure-height above sea level conversion formula.
6. as vehicle-mounted height above sea level monitoring device as described in the claim 5, it is characterized in that described air pressure filtering submodule filtering mode is a low-pass digital filter.
7. as vehicle-mounted height above sea level monitoring device as described in the claim 6, it is characterized in that the model of described central control module is the microprocessor μ PD78F0402 of NEC Corporation, the model of described sensor assembly is the MS5541C chip of Intersema company.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200468954U CN202024756U (en) | 2011-02-24 | 2011-02-24 | Vehicle-mounted elevation monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200468954U CN202024756U (en) | 2011-02-24 | 2011-02-24 | Vehicle-mounted elevation monitoring device |
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| CN202024756U true CN202024756U (en) | 2011-11-02 |
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| CN2011200468954U Expired - Fee Related CN202024756U (en) | 2011-02-24 | 2011-02-24 | Vehicle-mounted elevation monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748734A (en) * | 2015-04-17 | 2015-07-01 | 苏州健雄职业技术学院 | Vehicle-mounted electronic altitude compass having dip angle compensation function |
| CN107933462A (en) * | 2017-11-20 | 2018-04-20 | 中车株洲电力机车有限公司 | A kind of control method and device of vehicle subsidiary engine |
-
2011
- 2011-02-24 CN CN2011200468954U patent/CN202024756U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748734A (en) * | 2015-04-17 | 2015-07-01 | 苏州健雄职业技术学院 | Vehicle-mounted electronic altitude compass having dip angle compensation function |
| CN107933462A (en) * | 2017-11-20 | 2018-04-20 | 中车株洲电力机车有限公司 | A kind of control method and device of vehicle subsidiary engine |
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Granted publication date: 20111102 Termination date: 20200224 |