CN102564537A - Method for weighing object by using mobile terminal device - Google Patents

Abstract

The invention relates to a method for weighing an object by using a mobile terminal device. The method comprises the following steps of: putting an object to be measured on a screen of the mobile terminal device; acquiring contact resistance Rtouch (4) of an X resistance surface (2) and a Y resistance surface (3) of the screen through a sensor module of the mobile terminal device; acquiring the weight m of the object through a data processing module of the mobile terminal device; and optionally, expressing the acquired weight of the object, wherein the screen is a resistance type touch screen. By the method, the weight of the object can be weighed without the increase of cost, so that functions of the mobile terminal device are increased.

Description

A kind of method of using mobile terminal apparatus to weigh

Technical field

The present invention relates to a kind of method of using mobile terminal apparatus to weigh, the method that especially a kind of screen that utilizes mobile terminal apparatus is weighed.

Background technology

Present portable terminal product has various functions, for example, and call function, SMS, function of surfing the Net etc., function of weighing even.

For example, application number is that 200510086807.2 patented claim discloses a kind of mobile phone of realizing electronic scale function, comprises an analog-to-digital conversion process unit, a CPU processing unit and a signal output apparatus, a pressure transducer and an amplifying unit; Described pressure transducer is arranged in the lanyard hole.

And for example, application number is that 200920135320.2 patented claim discloses a kind of mobile phone of weighing, and comprises weight induction unit, data processing unit and display unit, and its weight induction unit comprises hook module, induction supporting module and link block.

For another example; Application number is that 200510030953.3 patented claim discloses a kind of mobile phone that can check weighing; Comprise panel, display screen; In panel, settle the sensor of a Measuring Object weight, the weighing structure that sensor links to each other, the other end links to each other with testee of one one end and said Measuring Object weight, the sensor of described Measuring Object weight is presented at the result on the display screen through the signal Processing in the panel.

Prior art all is through weighing structure such as hook being set on mobile phone, and through pressure sensitive sensor realization function of weighing, will increasing manufacturing cost like this.

Summary of the invention

The present inventor then looks for another way, and realizes function of weighing through the resistive touch screen of mobile terminal device self.

An object of the present invention is to provide a kind of method of using mobile terminal apparatus to weigh, comprise the steps:

1) object to be measured is placed on the screen of mobile terminal apparatus;

2) obtain the contact resistance R of screen through the sensor assembly of mobile terminal apparatus _Touch

3) data processing module through mobile terminal apparatus obtains weight of object m according to following relational expression;

$m\∝\frac{S}{g}{R}_{\mathrm{touch}}$

In the following formula, S is that contact area, the unit of object and screen is m ², g is an acceleration of gravity;

4) randomly, the weight of object that is obtained is expressed.

According to method of the present invention, preferably, described screen is a resistive touch screen.

According to method of the present invention, preferably, the contact area S with this object and resistive touch screen in the step 3) is divided into n gear S ₁, S ₂... S _N-1, S _n, n is natural number, obtains weight of object m and contact resistance R under the contact area of different gears _TouchBetween corresponding relation.Preferably, under the contact area condition of different gears, obtain not several on the same group weight of object m and contact resistance R through calibration _TouchBetween corresponding relation.

According to method of the present invention, described resistive touch screen is preferably four line touch-screens, five line touch-screens, seven line touch-screens, or eight line touch-screens.

According to method of the present invention, described resistive touch screen is preferably four line touch-screens.

According to method of the present invention, preferably, described contact resistance R _TouchBe the contact resistance R between resistive touch screen X resistance face and the Y resistance face _Touch

According to method of the present invention, preferably, described R _TouchObtain according to the ADC sample mode.

According to method of the present invention, preferably, described ADC sample mode comprises the steps:

(1) obtain X axial coordinate value, promptly X+ adds power supply, X-ground connection, and the Y+ sampling obtains X axial coordinate value X _Position

(2) obtain the Z1 magnitude of voltage, promptly Y+ adds power supply, X-ground connection, and the X+ sampling obtains magnitude of voltage Z1;

(3) obtain the Z2 magnitude of voltage, promptly Y+ adds power supply, X-ground connection, and the Y-sampling obtains magnitude of voltage Z2;

(4) obtain R through following formula _Touch

$R_{\mathrm{touch}}=R_{x-\mathrm{plane}}\×\frac{X_{\mathrm{position}}}{2^n}(\frac{Z_2}{Z_1}-1)$

In the formula, R _X-planeThe resistance value of expression X resistance face is known quantity; N representes the ADC sampling resolution of resistive touch screen drive IC.

According to method of the present invention, preferably, described ADC sampling resolution is 12bit.

According to method of the present invention, preferably, described mobile terminal apparatus is mobile phone, MP4 player, notebook computer, vehicle-mounted computer or panel computer.

According to method of the present invention, more preferably, described mobile terminal apparatus is a mobile phone.

The present invention utilizes resistive touch screen can realize the weighing to weight of object, is not increasing under the condition of cost, and having realized has increased the function of mobile terminal apparatus to the weighing of object.

Description of drawings

Fig. 1 is the metering circuit synoptic diagram of X axial coordinate value;

Fig. 2 is the metering circuit synoptic diagram of Z1 magnitude of voltage;

Fig. 3 is the metering circuit synoptic diagram of Z2 magnitude of voltage;

Fig. 4 is the view of weighing of the mobile terminal apparatus of embodiment 1.

Fig. 5 is the process flow diagram of weighing of embodiment 1.

Reference numeral specifies as follows:

1, touches the position;

2, X resistance face;

3, Y resistance face;

4, contact resistance.

Embodiment

Below in conjunction with the accompanying drawing specific embodiment the present invention is further described, but protection scope of the present invention is not limited to this.

The present invention realizes function of weighing through the resistive touch screen of mobile terminal device self." mobile terminal device " of the present invention is " mobile terminal device " of broad sense, comprises mobile phone, notebook computer, panel computer, MP4 player, vehicle-mounted computer etc." mobile terminal device " of the present invention is preferably mobile phone or panel computer, more preferably mobile phone.

Mobile terminal device of the present invention comprises data processing module, sensor assembly etc.Data processing module of the present invention can be the CPU of mobile terminal device, also can be the standalone module that is different from this CPU; Be preferably the CPU of mobile terminal device.Sensor assembly of the present invention preferably includes resistive touch screen and associated components thereof.These associated components are well-known to those skilled in the art.

" resistive touch screen " of the present invention is a kind of sensor, and (X, physical location Y) convert the voltage of representing X coordinate and Y coordinate into touch point in the rectangular area for it.A lot of liquid crystal (LCD) modules, LED (diode displaying) module have all adopted resistive touch screen, and this screen can produce the screen bias voltage with four lines, five lines, seven lines or eight lines, the voltage of the touch point of reading back simultaneously.

Resistive touch screen of the present invention can be the composite structure of composite structure, glass and the glass of film and film or the composite structure of film and glass, preferably adopts the composite structure of film and glass.All scribble for example ITO (indium tin oxide) coating on the adjacent one side of film and glass, ITO has the good electric conductivity and the transparency.The common mode of operation of resistive touch screen is following: when touch operation; The ITO of film lower floor can touch the ITO on glass upper strata; Spread out of corresponding electric signal via inductor, deliver to processor, be converted into X, Y value on the screen through computing through change-over circuit; And accomplish the action that clicks, and be presented on the screen.

Resistive touch screen of the present invention can be four line touch-screens, five line touch-screens, seven line touch-screens, or eight line touch-screens.Four lines and eight line touch-screens comprise two-layer transparent material with similar face resistance, and five lines and seven line touch-screens comprise a resistive layer and a conductive layer, above-mentionedly generally include a kind of resilient material between two-layer and separate two-layer.When the pressure (as pushing through nib or finger) that receives when touch screen surface is enough big, can produces between top layer and the bottom and contact.All resistive touch screens generally adopt the voltage divider principle to produce to represent the voltage of X coordinate and Y coordinate.

Be the method for work of example explanation touch-screen below with four line touch-screens.Four line touch-screens comprise two resistive layers, and wherein one deck respectively has a vertical busses in the left and right edges of screen, and another layer respectively has a horizontal bus at the bottom and the top of screen.In order to measure in X-direction, the left side bus is biased to 0V, the right side bus is biased to VREF.Top or bottom bus are connected to ADC, when top layer and bottom contact, can make one-shot measurement.In order to measure in Y direction, the top bus is biased to VREF, the bottom bus is biased to 0V.ADC is imported termination left side bus or right side bus, when top layer contacts with bottom, can measure voltage.

Be that example is explained Weighing method of the present invention with four line touch-screens below, other resistive touch screen is similar with it.

1) object to be measured is placed the contact site 1 of the screen of mobile terminal apparatus.The modes of emplacement of object depends on the shape of object and the size of screen.Preferably, at least one face of this object can be contained in the screen.If the maximum face of the area of this object can be contained in the screen, then preferably contact with screen, to improve the precision of measuring with this face.If the minimum face of the area of this object also can't be contained in the screen, then can be by means of helpers.Measure the general assembly (TW) W1 of object to be measured and said helpers, the weight W 2 of helpers respectively, obtain the weight of object to be measured through W1-W2.

Preferably, the area that object to be measured and screen are contacted is 1～99% of a screen area, more preferably 5～95%, most preferably be 10～90%.Can avoid object to be measured to contact like this, guarantee the accuracy of weighing with the shell of mobile terminal apparatus (screen outer edge).

2) obtain contact resistance 4 (R between resistive touch screen X resistance face 2 and the Y resistance face 3 _Touch).R _TouchValue obtains (referring to Fig. 1-3) according to the ADC sample mode.When X resistance face 2 contacts (referring to Fig. 4) with Y resistance face 3, at first, get X axial coordinate value, promptly X+ adds power supply, X-ground connection, the Y+ sampling obtains X axial coordinate value X _PositionSecondly, get the Z1 magnitude of voltage, promptly Y+ adds power supply, X-ground connection, and the X+ sampling obtains magnitude of voltage Z1; At last, get the Z2 magnitude of voltage, promptly Y+ adds power supply, X-ground connection, and the Y-sampling obtains magnitude of voltage Z2.According to above parameter amount, through type (1) obtains R _Touch

$R_{\mathrm{Touch}}=R_{x-\mathrm{Plane}}\×\frac{X_{\mathrm{Position}}}{2^n}(\frac{Z_2}{Z_1}-1)$ Formula (1)

In the formula, R _X-planeThe face resistance of expression X resistance face is known quantity; N representes the ADC sampling resolution of resistive touch screen drive IC.For example, the ADC sampling resolution of drive IC is 12bit, n=12 so, 2 ⁿ=4096.

3) data processing module through mobile terminal apparatus obtains weight of object m.Suppose with weight to be that the object of m is placed on (referring to Fig. 4) on the screen, if the contact area of this object and screen is S, the pressure P of its generation is so:

$P=\frac{F}{S}=\frac{\mathrm{Mg}}{S}$ Formula (2)

The size of pressure P and contact resistance R _TouchBecome than the row relation, that is:

P ∝ R _TouchFormula (3)

According to formula (2) and formula (3), can obtain weight of object m and contact resistance R _TouchRelation:

$m\∝\frac{S}{g}{R}_{\mathrm{Touch}}$ Formula (4)

Formula (4) exponent body weight m and contact area S and contact resistance R _TouchProportional relation.

Owing to have two running parameter S and R _Touch, increased the difficulty of scheme implementation to a certain extent.Contact area S is quantized, promptly contact area S is divided into n gear S for this reason ₁, S ₂... S _N-1, S _nThe situation of (n is a natural number) under different gear contact area conditions, obtains not several on the same group weight of object m and contact resistance R through calibration _TouchBetween corresponding numerical relation.In the time of the actual test object weight of user, suitable contact area is selected in prompting, not only solves object and resistance and shields the uncertain problem of contact area, and reduce measuring error to a certain extent.

4), randomly, the weight of object that is obtained is expressed according to method of the present invention.Can weight of object be presented on the screen, perhaps express through voice mode.

Embodiment 1

The flow process of weighing of embodiment 1 is referring to Fig. 5.The user opens the weight test function module of mobile phone, and the user selects suitable contact area S according to prompting _n, object to be measured (referring to table 1) is placed on the resistive touch screen, because action of gravity, resistive touch screen will produce interruption, carry out sampled value through ADC employing mode, and then obtain contact resistance R _Touch, data processing module is with contact resistance R _TouchBe converted into the weight of object under test, institute surveyed the result be presented on the screen.

Table 1

Object to be measured	Actual weight (gram)	Test weight (gram)
			Apple	220	209
Cup	100	95
			Derby	2358	2240

The present invention is not limited to above-mentioned embodiment, and under the situation that does not deviate from flesh and blood of the present invention, any distortion that it may occur to persons skilled in the art that, improvement, replacement all fall into scope of the present invention.

Claims (10)

1. a method of using mobile terminal apparatus to weigh comprises the steps:

1) object to be measured is placed on the screen of mobile terminal apparatus;

2) obtain the contact resistance R of screen through the sensor assembly of mobile terminal apparatus _Touch

3) data processing module through mobile terminal apparatus obtains weight of object m according to following relational expression;

$m\∝\frac{S}{g}{R}_{\mathrm{touch}}$

In the following formula, S is that contact area, the unit of object and screen is m ², g is an acceleration of gravity;

4) randomly, the weight of object that is obtained is expressed;

Described screen is a resistive touch screen.

2. method according to claim 1 is divided into n gear S with contact area S in the step 3) ₁, S ₂... S _N-1, S _n, n is natural number, obtains weight of object m and contact resistance R under the contact area of different gears _TouchBetween corresponding relation.

3. method according to claim 1 and 2, described resistive touch screen are four line touch-screens, five line touch-screens, seven line touch-screens or eight line touch-screens.

4. method according to claim 1 and 2, described resistive touch screen are four line touch-screens.

5. method according to claim 1 and 2, described contact resistance R _TouchBe the X resistance face of resistive touch screen and the contact resistance R between the Y resistance face _Touch

6. method according to claim 1 and 2, described R _TouchObtain according to the ADC sample mode.

7. method according to claim 6, described ADC sample mode comprises the steps:

(1) obtain X axial coordinate value, promptly X+ adds power supply, X-ground connection, and the Y+ sampling obtains X axial coordinate value X _Position

(2) obtain the Z1 magnitude of voltage, promptly Y+ adds power supply, X-ground connection, and the X+ sampling obtains magnitude of voltage Z1;

(3) obtain the Z2 magnitude of voltage, promptly Y+ adds power supply, X-ground connection, and the Y-sampling obtains magnitude of voltage Z2;

(4) obtain R through following formula _Touch

$R_{\mathrm{touch}}=R_{x-\mathrm{plane}}\×\frac{X_{\mathrm{position}}}{2^n}(\frac{Z_2}{Z_1}-1)$

In the formula, R _X-planeThe resistance value of expression X resistance face is known quantity; N representes the ADC sampling resolution of resistive touch screen drive IC.

8. method according to claim 7, described ADC sampling resolution is 12bit.

9. method according to claim 1 and 2, described mobile terminal apparatus are mobile phone, MP4 player, notebook computer, vehicle-mounted computer or panel computer.

10. method according to claim 9, described mobile terminal apparatus are mobile phone.

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