The horizontal self-checking device of balance
Technical field
The utility model relates to a kind of horizontal self-checking device of balance.
Background technology
Physical balance is instrument commonly used in the laboratory.Balance is a kind of weighing apparatus, is the instrument of weighing mass of object.It is made according to lever principle, and before experiment, we just require first to transfer the balance level, with the purpose of base plate furnishing level be in cutter hold the furnishing level.Because middle cutter holds surperficial smoother, if the surface is not level, crossbeam is raised and when waving take the middle edge of a knife as fulcrum, and crossbeam will downward direction move.Thereby the indicating value mobility error of balance is increased.The equilibrium position of balance is just unstable.When mobile larger, the balance crossbeam also can rub with support.And we are as the equilibrium position with the level of crossbeam.Crossbeam becomes level, and when middle cutter held also the one-tenth level, left and right brachium just equated.If it is out-of-level that crossbeam level and middle cutter hold, supporting-point is not just on the plane of symmetry of the edge of a knife, so two arms produce additional error in lengths.
Physical balance in the laboratory still usage level bubble comes whether level of horizontal measurement balance, come the eye-level bubble by the screw of regulating the balance base angle, judge whether level of balance base, this method takes time and effort, the information that the movement position of bubble reflects when regulating the base angle screw is not very clear and definite, usually very incapable when the level of adjusting, if balance does not have level, experiment can cause very large error.
The utility model content
The utility model provides a kind of horizontal self-checking device of balance, and this balance comprises 3 base angle screws, and 1 base angle screw is fixed screw, and another 2 base angle screws are electronic adjustable screw, and described horizontal self-checking device comprises:
CPU, obliquity sensor, electric pressure converter, analog to digital converter, touch display screen, motor regulating circuit and motor,
It is characterized in that, described electric pressure converter is connected respectively to CPU and inclination angle converter, described inclination angle converter is connected to analog to digital converter, this analog to digital converter is connected to CPU, this CPU is also connected to touch display screen and motor regulating circuit, this motor regulating circuit is connected to motor, and the output terminal of this motor is connected respectively to described 2 electronic adjustable screw by connecting link or connecting line, wherein:
Described electric pressure converter is used for converting supply voltage to CPU and the applicable operating voltage of analog to digital converter;
Described 2 electronic adjustable screw respectively are equipped with an obliquity sensor respectively with on the line direction of described fixed screw;
Described analog to digital converter will become digital signal from the analog signal conversion of obliquity sensor, and export to CPU;
Described CPU processes the digital signal that receives, and will export to touch display screen for the digital signal that shows the inclination angle value, will export to the motor regulating circuit be used to the control signal of regulating described electronic adjustable screw;
Described motor regulating circuit is used for regulating the control signal of described electronic adjustable screw according to being used for of receiving, and exports corresponding magnitude of voltage to motor;
Described motor is used for carrying out work according to the voltage of input, drives described electronic adjustable screw by connecting link or connecting line and screws in or screw out.
Beneficial effect
The horizontal self-checking device of balance of the present utility model is simple in structure, easily operation, and adjustment process is convenient, and is quick, is very suitable for the Level tune of balance base.
Description of drawings
Fig. 1 is the schematic block diagram of the horizontal self-checking device of balance of the present utility model.
Embodiment
The applied balance of horizontal self-checking device of the present utility model comprises 3 base angle screws, and 1 base angle screw is fixed screw, and another 2 base angle screws are electronic adjustable screw.
As shown in Figure 1, the horizontal self-checking device of balance of the present utility model comprises:
CPU, obliquity sensor, electric pressure converter, analog to digital converter, touch display screen, motor regulating circuit and motor, wherein said electric pressure converter is connected respectively to CPU and inclination angle converter, described inclination angle converter is connected to analog to digital converter, this analog to digital converter is connected to CPU, this CPU is also connected to touch display screen and motor regulating circuit, this motor regulating circuit is connected to motor, and the output terminal of this motor is connected respectively to described two electronic adjustable screw by connecting link or connecting line.
Described electric pressure converter is used for converting supply voltage to CPU and the applicable operating voltage of analog to digital converter.
Described 2 electronic adjustable screw respectively are equipped with an obliquity sensor respectively with on the line direction of described fixed screw.
Described analog to digital converter will become digital signal from the analog signal conversion of obliquity sensor, and export to CPU.
Described CPU processes the digital signal that receives, and will export to touch display screen for the digital signal that shows the inclination angle value, will export to the motor regulating circuit be used to the control signal of regulating described electronic adjustable screw.
Described motor regulating circuit is used for regulating the control signal of described electronic adjustable screw according to being used for of receiving, and exports corresponding magnitude of voltage to motor.
Motor is used for carrying out work according to the voltage of input.The duration that described duty comprises forward, counter-rotating, high-speed rotation, slowly runs and rotates etc.This is well known to a person skilled in the art.Driving described electronic adjustable screw by connecting link or connecting line during described motor operation screws in or screws out.
The specific works process is as follows:
Described obliquity sensor is measured the inclination angle value, with its with the formal output of simulating signal to analog to digital converter, this analog to digital converter will receive analog signal conversion and become digital signal, then export to CPU, this CPU processes the digital signal that receives, at first be formed for showing the digital signal of inclination angle value and export to touch display screen, showing obliquity information by this touch display screen.
If measured balance is not level, so on the line direction of two electronic adjustable screw and fixed screw, if the inclination angle value that the position of electronic adjustable screw higher than fixed screw, shows on touch display screen on the occasion of; Otherwise, if the inclination angle value that the position of electronic adjustable screw lower than fixed screw, shows on touch display screen is negative value.
Then, described CPU also is formed for regulating the control signal of described electronic adjustable screw and exports to the motor regulating circuit according to the instruction of input.This motor regulating circuit is according to the described control signal that receives, export corresponding magnitude of voltage to motor, this motor carries out work according to the voltage of input, driving described electronic adjustable screw by connecting link or connecting line screws in or screws out, until the inclination angle value that shows on touch display screen is zero, balance is transferred to horizontality, this moment, described CPU stopped sending described control information, described motor regulating circuit also stops output services voltage, described motor quits work, and completes thus the process to the Level tune of balance.
Can realize inputting instruction by touch display screen, start functions such as regulating described electronic adjustable screw.
The horizontal self-checking device of balance of the present utility model is simple in structure, easily operation, and adjustment process is convenient, and is quick, is very suitable for the Level tune of balance base.