CN214277179U

CN214277179U - Mobile terminal capable of accurately weighing

Info

Publication number: CN214277179U
Application number: CN202022500096.1U
Authority: CN
Inventors: 张旭
Original assignee: Shanghai Wingtech Information Technology Co Ltd
Current assignee: Shanghai Wingtech Information Technology Co Ltd; Shanghai Wentai Information Technology Co Ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-09-24
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses a mobile terminal capable of accurately weighing, which comprises a screen, a processing module, a beam, an electromagnetic module and a compensation module, wherein the processing module, the beam, the electromagnetic module and the compensation module are arranged at the inner side of the screen; the processing module is electrically connected with the compensation module; the fulcrum of the beam is fixed in the mobile terminal, and two ends of the beam are respectively connected to a preset position on the inner side of the screen and the electromagnetic module. The utility model discloses set up the crossbeam in the screen inboard, the crossbeam is lever structure, connects the moment balance at screen and electromagnetic module's both ends and makes the crossbeam be in balanced state. When the article is placed at the preset position of the screen, the screen is pressed downwards to unbalance the two ends of the beam, and the compensation module generates compensation current to increase the magnetic force of the electromagnetic module, so that the two ends of the beam are rebalanced. The processing module determines the weight of the item by compensating for the magnitude of the current. The utility model discloses the structure is comparatively simple, and measured precision is higher, has satisfied the daily demand of weighing to gram level article of people.

Description

Mobile terminal capable of accurately weighing

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electronic equipment technical field especially relates to a mobile terminal that can accurately weigh.

[ background of the invention ]

With the improvement of the life quality of people, the requirement on the diversity of the functions of the mobile terminal is improved. Users sometimes encounter situations where the weight of an item needs to be weighed, particularly on the gram or milligram scale, such as: the weight of the articles such as tablets, diamonds, gold jewelry and the like needs to be measured by small grams. At this time, the user is often required to weigh or check the weight of the object, and the user cannot carry a precision measuring tool at any time. Therefore, in the prior art, accessories are often added to portable mobile terminals to realize the weighing function. For example, a weight hook is added to a mobile phone case or a mobile phone accessory or a weight sensor is placed in the mobile terminal. However, the method of adding the weighing hook has a problem of complicated structure, and the presence of the hook causes inconvenience to the use of the mobile terminal. And the manner of adopting built-in balance (sensor) is inaccurate to measure the goods with small gram number, and is difficult to meet the weighing requirement of goods with gram level and milligram level.

In view of the above, it is desirable to provide a mobile terminal capable of accurately weighing to overcome the above-mentioned drawbacks.

[ Utility model ] content

The utility model aims at providing a but mobile terminal of accurate weighing aims at improving current mobile terminal and weighs the structure and has the problem that the structure is complicated or the precision is not enough, will weigh the structure and locate in mobile terminal, promotes the accuracy that article weighed.

In order to achieve the above object, the present invention provides a mobile terminal capable of accurately weighing, which comprises a screen of the mobile terminal, and further comprises a processing module, a beam, an electromagnetic module and a compensation module, which are arranged inside the screen; the processing module is electrically connected with the compensation module; the fulcrum of the beam is fixed in the mobile terminal, and two ends of the beam are respectively connected to a preset position on the inner side of the screen and the electromagnetic module; when an object to be weighed is placed on the outer side of a preset position where the screen is connected with one end of the cross beam, the screen is pressed to generate elastic deformation, and therefore the position of the cross beam is changed; the compensation module is used for generating compensation current to the electromagnetic module when detecting that the position of the cross beam changes, so that the magnetic force generated by the electromagnetic module is increased, the cross beam returns to an initial state, and the processing module is used for obtaining the weight of the object to be weighed according to the size of the compensation current.

In a preferred embodiment, the distance from the two ends of the beam respectively connected with the screen and the electromagnetic module to the pivot is consistent.

In a preferred embodiment, the electromagnetic module comprises a magnet fixed in the mobile terminal and a coil electrically connected with the compensation module; the magnet is provided with an accommodating groove with an opening facing the beam, and one end of the coil is connected with one end of the beam and is suspended in the accommodating groove; when the coil is energized, a magnetic field is generated which is in close proximity to the magnet.

In a preferred embodiment, an end of the beam remote from the coil is fixed in the mobile terminal by an elastic member.

In a preferred embodiment, the compensation module comprises a receiving light emitting diode, a differential transformer and a current compensation unit; the receiving light emitting diode and the differential transformer are used for detecting the position variable of the beam, and the current compensation unit is used for supplying compensation current to the coil according to the position variable of the beam, so that the magnetic field intensity of the coil is increased, and the beam is enabled to restore balance again.

In a preferred embodiment, the compensation module further comprises an internal detection circuit unit; and the internal detection circuit unit is used for controlling the current compensation unit to generate the compensation current after receiving the position variable information of the beam, which is sent by the receiving light-emitting diode and the differential transformer.

In a preferred embodiment, the compensation module includes a position detector and a current compensation unit disposed in the receiving groove; the position detector is used for detecting transient displacement of the coil in the magnet; the current compensation unit is used for supplying compensation current to the coil according to the transient displacement of the coil, so that the magnetic field intensity of the coil is increased, and the coil returns to the state before the transient displacement.

In a preferred embodiment, the processing module comprises a resistor, an analog-to-digital conversion unit and a micro-processing unit which are connected in series with the current compensation unit; the resistor is used for converting the compensation current into a voltage signal, the analog-to-digital conversion unit is used for converting the voltage signal into a digital signal, and the micro-processing unit is used for obtaining the weight of the object to be weighed after the digital signal is subjected to operation processing and displaying the weight on the screen.

In a preferred embodiment, the processing module further comprises a signal amplifying unit and a filtering unit; the signal amplification unit is used for amplifying the voltage signal, and the filtering unit is used for filtering noise waves of the voltage signal.

The utility model provides a but mobile terminal of accurate weighing sets up the crossbeam in the screen inboard, and the crossbeam is lever structure, connects the moment balance messenger crossbeam in screen and electromagnetic module's both ends and is in balanced state. When the article is placed at the preset position of the screen, the screen is pressed downwards to unbalance the two ends of the beam, and the compensation module generates compensation current to increase the magnetic force of the electromagnetic module, so that the two ends of the beam are rebalanced. The processing module determines the weight of the item by compensating for the magnitude of the current. The utility model discloses the structure is comparatively simple, and measured precision is higher, has satisfied the daily demand of weighing to gram level article of people.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a mobile terminal capable of accurately weighing according to the present invention;

fig. 2 is a system architecture diagram of the mobile terminal capable of precision weighing shown in fig. 1.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

The embodiment of the utility model provides a but mobile terminal 100 of accurate weighing is provided, including mobile terminal's screen 200 for place the mobile terminal level, the article of waiting to weigh of gram level weight is placed to specific position on screen 200, thereby weighs the weight of article, and shows in screen 200. Among them, the mobile terminal includes but is not limited to: mobile phones, tablet computers, and other portable electronic devices.

As shown in fig. 1 and 2, the mobile terminal 100 capable of accurately weighing includes a processing module 10, a beam 20, an electromagnetic module 30 and a compensation module 40 disposed inside a screen 200.

The fulcrum of the beam 20 is fixed in the mobile terminal to form a balance structure. When the beam 20 is in equilibrium, the moment is the same at both ends of the beam 20. The fulcrum of the beam 20 has two fixing modes: one is hanging below the screen 200; secondly, the fulcrum of the beam 20 can be movably connected to a fixed structure in the mobile terminal. Both ends of the beam 20 are connected to a predetermined position inside the screen and the electromagnetic module 30, respectively. In order to facilitate subsequent operations and improve the stability of the beam 20, the distances from the two ends of the beam 20, which are respectively connected to the screen 200 and the electromagnetic module 30, to the supporting points are the same, i.e., when the moments at the two ends of the beam 20 are the same, the forces applied to the two ends are also the same. One end of the beam 20 can detachably abut against a predetermined position inside the screen 200 through a rigid structure, and the other end is connected to the electromagnetic module 30 through a flexible structure. When an article is placed on the outer side of the predetermined position of the screen 200, the predetermined position of the screen 200 is deformed inward, and the pressure is increased, so that one end of the cross member 20 is lowered, thereby causing different moments at both ends of the cross member 20, and the cross member 20 is not in balance, and tilting occurs.

Further, an end of the beam 20 near a predetermined position of the screen 200 is fixed in the mobile terminal by an elastic member 21. In the embodiment, the elastic member 21 is a spring, which generates an elastic force opposite to the pressure direction of the screen 200, so that one end of the beam 20 abuts against a predetermined position of the screen 200, and meanwhile, the situation that the inclination angle of the beam 20 is too large and damages components in the mobile terminal can be avoided. It can be understood that when the beam 20 goes from the initial balanced state to the unbalanced state and then returns to the initial balanced state, the total expansion length of the spring is unchanged, and therefore, the elastic force of the spring is a constant value in the subsequent calculation process.

The electromagnetic module 30 includes a magnet 31 fixed in the mobile terminal and a coil 32 electrically connected to the compensation module 40. It can be appreciated that when the item is not weighed, the coil 32 is not energized, facilitating energy savings; when the user turns on the weighing function at the mobile terminal, the coil 32 is energized to form an electromagnet, and the magnetic pole direction is opposite to the magnet 31, so that the coil 32 is attracted to the magnet 31, thereby pulling down the end of the beam 20 away from the predetermined position of the screen 200. Since the magnetic field of the electromagnet is linear with the current passing through the coil 32, the two ends of the beam 20 can be moment-balanced by adjusting the magnitude of the current, i.e. the initial current.

Specifically, the magnet 31 has a receiving groove 311 opened toward the beam, and one end of the coil 32 is connected to one end of the beam 20 and suspended in the receiving groove 311. The receiving slot 311 is cylindrical, a cylindrical fixing column 312 is disposed on the central axis, and the fixing column 312 may have magnetism in the same direction as the magnet 31 or may not have magnetism. The fixing posts 312 extend into the through holes of the coils 32, so that the coils 32 are prevented from moving transversely and affecting the weighing precision.

Further, in one embodiment, as shown in fig. 2, the compensation module 40 includes a receiving led 41, a differential transformer 42 and a current compensation unit 43. The receiving led 41 and the differential transformer 42 are used to detect the position variable of the beam 20, and in this embodiment, both detect the end of the beam 20 near one end of the coil 32, and when the displacement of the end of the beam 20 is detected, an unbalanced signal is generated and sent to the current compensation unit 43. It should be noted that, the method and the implementation principle of the position detection by the receiving led 41 and the differential transformer 42 may refer to the prior art, and the present invention is not limited herein. The current compensation unit 43 is used for applying a compensation current to the coil 32 according to the position variable of the beam 20, so as to increase the magnetic field strength of the coil 32, and further to restore the balance of the beam 20. Specifically, the current compensation unit 43 may gradually increase the current from 0, so as to gradually increase the magnetic field of the coil 32 until the receiving led 41 and the differential transformer 42 detect that the end of the beam 20 returns to the initial position; or, a specific amount of current may be calculated according to the position variation of the beam 20, and the amount of current is directly added to the coil 32, and then the adjustment is performed in the vicinity of the amount of current until the beam 20 is balanced.

Further, the compensation module 40 further includes an internal detection circuit unit 44. The internal detection circuit unit 44 is configured to receive the position variable information (i.e., the imbalance signal) of the beam 20 sent by the light emitting diode 41 and the differential transformer 42, and then control the current compensation unit 43 to generate the compensation current.

In another embodiment, the compensation module 40 includes a position detector (not shown) and a current compensation unit (not shown) disposed in the receiving slot 311. The position detector is used to detect the transient displacement of coil 32 within magnet 31. Specifically, when the beam 20 is tilted out of balance, one end of the beam 20 will lift the coil 32 to generate a transient displacement. When the position detector detects the displacement of the transient displacement, the current compensation unit is controlled to generate compensation current. Wherein, the structure and the detection principle of position detector can refer to prior art, the utility model discloses do not limit here. The current compensation unit is used for supplying compensation current to the coil 32 according to the transient displacement of the coil 32, so that the magnetic field intensity of the coil 32 is increased, and the coil 32 is returned to the state before the transient displacement.

The utility model discloses an implementation principle does:

a zeroing step: in the no-load state, the coil passes through the initial current to generate electromagnetic force, so that the beam 20 is in a balanced initial state;

weighing: an object to be weighed is placed outside a predetermined position where the screen 200 is connected to one end of the beam 20, and the screen 200 is pressed to be elastically deformed so as to change the position of the beam 20, so that the beam 20 is tilted. The compensation module 40 detects the position change of the beam 20, and generates a compensation current to the coil 32, so that the electromagnetic force F is increased, and the beam 20 returns to the initial equilibrium state;

a calculation step: the processing module 10 is used for obtaining the mass of the object to be weighed according to the magnitude of the compensation current.

Specifically, the processing module 10 is electrically connected to the compensation module 40. As shown in fig. 2, the processing module 10 includes a resistor 11, an analog-to-digital conversion unit 12 and a micro-processing unit 13 connected in series to the current compensation unit 43. The resistor 11 is used for converting the compensation current into a voltage signal, the analog-to-digital conversion unit 12 is used for converting the voltage signal into a digital signal, and the micro-processing unit 13 is used for obtaining the mass of the object to be weighed after the digital signal is subjected to operation processing and displaying the mass on the screen 200. The processing module 10 further includes a signal amplifying unit 14 and a filtering unit 15. The signal amplifying unit 14 is used for amplifying the voltage signal, and the filtering unit 15 is used for filtering noise of the voltage signal.

In the calculation, the electromagnetic force F ═ KBLI, where K is a constant (related to the unit of use), B is the magnetic induction, L is the length of the wire of the coil 32, and I is the current intensity through the wire of the coil 32. The electromagnetic force F is equal to the gravity mg of the object to be measured in magnitude and opposite in direction, and balance is achieved. At this time, the inner and outer sides of the predetermined position of the screen 200 are respectively subjected to the supporting force of the cross member 20 (provided by the electromagnetic force F through the lever principle) and the gravity applied by the object and reach an equilibrium state, so that the elastic deformation of the screen 200 is eliminated.

To sum up, the utility model provides a but mobile terminal 100 of accurate weighing sets up crossbeam 20 in screen 200 inboard, and crossbeam 20 is lever structure, connects the moment balance messenger crossbeam 20 in screen 200 and electromagnetic module 30's both ends and is in balanced state. When an object is placed at a predetermined position of the screen 200, the screen 200 is pressed down to unbalance two ends of the beam 20, and the compensation module 40 generates a compensation current to increase the magnetic force of the electromagnetic module 30, so that the two ends of the beam 20 are rebalanced. The processing module 10 determines the weight of the item by compensating the magnitude of the current. The utility model discloses the structure is comparatively simple, and measured precision is higher, has satisfied the daily demand of weighing to gram level article of people.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. A mobile terminal capable of accurately weighing comprises a screen of the mobile terminal, and is characterized by further comprising a processing module, a beam, an electromagnetic module and a compensation module, wherein the processing module, the beam, the electromagnetic module and the compensation module are arranged on the inner side of the screen;

the processing module is electrically connected with the compensation module;

the fulcrum of the beam is fixed in the mobile terminal, and two ends of the beam are respectively connected to a preset position on the inner side of the screen and the electromagnetic module;

when an object to be weighed is placed on the outer side of a preset position where the screen is connected with one end of the cross beam, the screen is pressed to generate elastic deformation so as to change the position of the cross beam, and the compensation module is used for generating compensation current to the electromagnetic module when the position change of the cross beam is detected, so that the magnetic force generated by the electromagnetic module is increased, and the cross beam returns to an initial state;

and the processing module is used for obtaining the weight of the object to be weighed according to the magnitude of the compensation current.

2. The mobile terminal capable of accurately weighing according to claim 1, wherein the beam is respectively connected with the screen and the distance from the two ends of the electromagnetic module to the pivot is consistent.

3. The mobile terminal capable of accurately weighing according to claim 1, wherein the electromagnetic module comprises a magnet fixed in the mobile terminal and a coil electrically connected with the compensation module; the magnet is provided with an accommodating groove with an opening facing the beam, and one end of the coil is connected with one end of the beam and is suspended in the accommodating groove; when the coil is energized, a magnetic field is generated which is in close proximity to the magnet.

4. The mobile terminal capable of accurately weighing according to claim 3, wherein an end of the beam away from the coil is fixed in the mobile terminal by an elastic member.

5. The mobile terminal capable of accurate weighing according to claim 4, wherein the compensation module comprises a receiving light emitting diode, a differential transformer and a current compensation unit; the receiving light emitting diode and the differential transformer are used for detecting the position variable of the beam, and the current compensation unit is used for supplying compensation current to the coil according to the position variable of the beam, so that the magnetic field intensity of the coil is increased, and the beam is enabled to restore balance again.

6. The mobile terminal capable of precision weighing according to claim 5, wherein the compensation module further comprises an internal detection circuit unit; and the internal detection circuit unit is used for controlling the current compensation unit to generate the compensation current after receiving the position variable information of the beam, which is sent by the receiving light-emitting diode and the differential transformer.

7. The mobile terminal capable of accurately weighing according to claim 4, wherein the compensation module comprises a position detector and a current compensation unit disposed in the receiving slot; the position detector is used for detecting transient displacement of the coil in the magnet; the current compensation unit is used for supplying compensation current to the coil according to the transient displacement of the coil, so that the magnetic field intensity of the coil is increased, and the coil returns to the state before the transient displacement.

8. The mobile terminal capable of accurately weighing according to claim 7, wherein the processing module comprises a resistor, an analog-to-digital conversion unit and a micro-processing unit connected in series with the current compensation unit; the resistor is used for converting the compensation current into a voltage signal, the analog-to-digital conversion unit is used for converting the voltage signal into a digital signal, and the micro-processing unit is used for obtaining the weight of the object to be weighed after the digital signal is subjected to operation processing and displaying the weight on the screen.

9. The mobile terminal capable of accurately weighing according to claim 8, wherein the processing module further comprises a signal amplifying unit and a filtering unit; the signal amplification unit is used for amplifying the voltage signal, and the filtering unit is used for filtering noise waves of the voltage signal.