CN204964078U - Static detection device of tire ground pressure - Google Patents

Abstract

The utility model discloses a static detection device of tire ground pressure, the measuring device hardware systems of 89C52 singlechip as the core expansion is used in this design. Mainly constitute by pressure collecting module (1), signal processing module (2), AD conversion module (3), single -chip computer control module (4), liquid crystal display module (5) and power (6). Wherein, flexiforce film pressure sensor A301 is chooseed for use to the pressure collecting module, signal processing module mainly includes operational amplifier MCP6001, AD conversion module chooses ADC0808 for use, STC89C52 is chooseed for use to the singlechip, and LCD12864 is chooseed for use to the LCD screen, but 5V portable power source is chooseed for use to the power. The utility model discloses it is more simple and convenient that the messenger measures tire ground pressure, and the precision is higher, not only is applicable to the contact force who measures tire and hardstand, also is suitable for the contact force who measures tire and hag face. This pressure measurement can detect 8 points of tire ground connection at most simultaneously, can be very clear know the numerical value of every point, and then the distribution that draws tire ground pressure, and then provide the basis for the protection on the improvement of tire and ground.

Description

A kind of tyre contact pressure static detection device

Technical field

A kind of tyre contact pressure static detection device, belongs to mechanical technical field.

Background technology

For wheeled vehicle, tire is the unique parts that vehicle contacts with road surface.Vehicle produces interaction force by the contact on tire and ground, and this acting force is exactly the ground pressure between tire and ground, the size of this acting force and distribution are for the adhesion property improved between tire and ground, and the running resistance reducing vehicle has important effect.

The size of tyre contact pressure and the force-bearing situation of distribution character road pavement inside configuration have a great impact.When tire carries out operation on soil (such as: plough), the size of pressure between tire and soil, directly can reflect soil packing degree, and then determine whether the growing environment having had influence on crops; When tire travels on hard pavement (such as: asphalt flooring), want to understand further accurately the mechanical response in pavement structure under load effect, especially the interior force-responsive of brea bed near tire and road surface interface, must the size of accurate assurance tyre contact pressure and distribution.

Whether reasonable usability and the life-span that directly can have influence on tire of ground contact pressure distribution.

At present, architectural characteristic and the mechanical characteristic of what existing tyre contact pressure proving installation was mainly studied is tire self, although there are some to be specifically designed to the experimental provision measuring tyre contact pressure, but the ground pressure that these devices are suitable only for hardstand is measured, hag face for different hardness cannot be measured, and these device volumes are relatively large, can not carry.

Utility model content

The purpose of this utility model is to overcome prior art Problems existing, provides a kind of tyre contact pressure static detection device.

For solving the problems of the technologies described above, the utility model is achieved through the following technical solutions:

A kind of tyre contact pressure static detection device of the present utility model, is characterized in that comprising: pressure acquisition module, signal processing module, A/D modular converter, single chip control module, LCD MODULE and power supply form.

Described pressure acquisition module is connected with described signal processing module, described signal processing module is connected with described A/D modular converter, described A/D modular converter is connected with described single chip control module, described single chip control module is connected with described LCD MODULE, and described power supply is powered to all modules.

Pressure acquisition module selects flexiforce diaphragm pressure sensor A301;

Operational amplifier MCP6001 selected by signal processing module amplifier;

A/D modular converter selects ADC0808;

STC89C52 selected by single-chip microcomputer,

Liquid crystal display selects LCD12864,

Power supply selects 5V movable power source.

The utility model is compared with prior art: have that structure is simple, security performance is reliable, measurement data is accurate, real-time is high, and the advantage such as be easy to carry.

Accompanying drawing explanation

Fig. 1 is Single Chip Microcomputer (SCM) system schematic diagram of the present utility model;

Fig. 2 is singlechip minimum system circuit figure;

Fig. 3 is AD conversion module circuit diagram;

Fig. 4 is pressure acquisition, signal processing module circuit diagram;

Fig. 5 is LCD MODULE circuit diagram.

Embodiment

Below with reference to the accompanying drawings and in conjunction with example, describe the utility model in detail.

As shown in Figure 1, a kind of tyre contact pressure static detection device mainly comprises pressure acquisition module, signal processing module, A/D modular converter, single chip control module, LCD MODULE and power supply composition.Wherein, pressure acquisition module selects flexiforce diaphragm pressure sensor A301; Signal processing module mainly comprises operational amplifier MCP6001; A/D modular converter selects ADC0808; STC89C52 selected by single-chip microcomputer, and liquid crystal display selects LCD12864, and power supply selects 5V movable power source.

As shown in Figure 3, ADC0808 can gather at most 8 road voltages, is V0-V7 respectively.That is this pick-up unit can gather at most the ground pressure of tire 8 points simultaneously.Its changing voltage V0-V7 is by pressure acquisition, signal processing module (as Fig. 4), gathers and processes the voltage exported.In addition, the OUT1-OUT8 mouth of ADC0808 accesses the D0-D7 mouth (as Fig. 5) of LCD12864 respectively; START and ALE port is all controlled by single-chip microcomputer P2.7 mouth; CLOCK port access single-chip microcomputer P2.4 mouth, interrupts by the time of single-chip microcomputer clock signal ADC0808 being sent to a 500kHz; EOC port access single-chip microcomputer P2.6 mouth; 0E port access single-chip microcomputer P2.5 mouth; ADDA, ADDB, ADDC port accesses P2.0, P2.1, P2.2 mouth of single-chip microcomputer respectively, and single-chip microcomputer, by exporting different combinations of values, is selected address, and then measured respectively the ground pressure of each passage.

Pressure acquisition, signal processing module are as shown in Figure 4.Ground pressure is gathered by flexiforce diaphragm pressure sensor A301.Flexiforce diaphragm pressure sensor is a kind of ultra-thin and flexible P.e.c., its conductance and pressure linear.During measurement, directly sensor directly can be attached to surface of tyre.In circuit, this sensor is equivalent to a variable resistor, and when there is no load, sensor is high-impedance state, and when loaded, resistance declines.For this sensor, the most classical utilization is exactly the pressure detected is changed into voltage signal export.In the circuit, with the voltage drive of +/-5V, reverse scaling circuit structure, can draw the relation of output voltage and force-sensing resistor.

As shown in Figure 5, liquid crystal display selects LCD12864 to LCD MODULE, and its D0-D7 mouth accesses single-chip microcomputer P1.0-P1.7 mouth respectively; EN mouth access single-chip microcomputer P3.0; WR mouth access single-chip microcomputer P3.1 mouth; RS mouth access single-chip microcomputer P3.2 mouth; PSB mouth access single-chip microcomputer P3.7 mouth.The concrete numerical value of ground pressure of 8 collection points can directly be presented at above liquid crystal display 12864.

Principle of the present utility model:

The utility model is made up of pressure acquisition system, signal processing system, A/D converting system, single-chip computer control system, liquid crystal display systems.The force value that its pressure transducer gathers, convert magnitude of voltage to by amplifying circuit, send A/D converter to, A/D converter converts digital quantity to analog quantity, finally shows on liquid crystal display.

The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (1)

1. a tyre contact pressure static detection device, is characterized in that comprising: pressure acquisition module (1), signal processing module (2), A/D modular converter (3), single chip control module (4), LCD MODULE (5) and power supply (6) form; Wherein, pressure acquisition module selects flexiforce diaphragm pressure sensor A301; Signal processing module mainly comprises operational amplifier MCP6001; A/D modular converter selects ADC0808; STC89C52 selected by single-chip microcomputer, and liquid crystal display selects LCD12864, and power supply selects 5V movable power source; Described pressure acquisition module (1) is connected with described signal processing module (2), described signal processing module (2) is connected with described A/D modular converter (3), described A/D modular converter (3) is connected with described single chip control module (4), described single chip control module (4) is connected with described LCD MODULE (5), and described power supply (6) is powered to all modules.