CN2148952Y - Digital display electronic counting balance - Google Patents

Abstract

The utility model discloses a micro hanging type digital display electronic counting balance, which is compose of a sensor, a signal amplification and processing part, a mold / number conversion part, a functional conversion part, a calculation part, a display part, etc. Direct current power supply provides electricity. The structure of the balance body adopts a dual-ring hanging type without calibration the horizon. Weighing precision ranges from about 1% to 1.5%. The volume of the balance is very small, and the volume is about 0.35 dm< 3 >. A liquid crystal digital display screen, a keyboard, a function converting switch and a range converting switch. The bottom of the balance body is provided with a protective cover for a sensor. The balance can be used to weigh and calculate various weights, and can be used as a common calculator, in particular to the weighing and calculation in a portable occasion. All results are in digital display.

Description

Digital display electronic counting balance

The utility model relates to a kind of electronic scales of ad hoc structure, relates in particular to a kind of miniature suspension type digital display electronics calculating scale.

The electronic scales of having sold in the market, the various electronic scaless that have coml to sell goods and use in electronic scales, commercial production and the quality testing, description is various, and range, function and precision are different.Existing various electronic scales nearly all is sales counter and the medium and small desk-top electronic scales of testing laboratory's use or large-scale industrial electronics scale, the volume of this electron-like scale is generally bigger, most no knife edge type electromagnetic suspension feedback system or all kinds of non-electrical quantity measurement technologies of adopting of its dynamometry assembly.The dynamometry assembly of existing electronic scales requires to keep stable relative position with surface level, so the necessary before use calibrated horizontal of this scale is not easy to carry.A few suspension type electronic scales as capacitance electronic hanging scale, only obtains less application in the weighing of large-tonnage object.

The purpose of this utility model provides a kind of novel miniature suspension type digital display electronics calculating scale.This scale partly constitutes DC power supply by sensor, signal amplification and processing, mould/number conversion, function conversion, calculating and demonstration etc. are main.The scale structure of this scale adopts the dicyclo suspension type, need not calibrated horizontal before using, and weighing is accurate.The volume of this scale is very little, on the scale dignity plate liquid crystal digital display, keyboard, function switch and range switch is arranged, and a sensor protection housing that can overturn is arranged at scale body bottom, suitable especially carrying.This scale can be used for weighing and this weight being carried out various calculating, also can be used as common counter and uses, and is particularly useful for weighing and calculating under the portable occasion.All results are numeral and show.

The utility model is achieved in that sensor utilization non-electrical quantity measurement technology is converted to electric signal with power, difference according to the maximum capacity value, can adopt the sensor of dissimilar or range, such as: elements such as adhering resistance strain sheets, use semiconductor strain device or pull spring all can be finished this conversion on flexible member.The electric signal that utilizes advantages such as integrated amplifier high-gain, low drift that sensor is exported amplifies.When electric signal is amplified, must in measurement and amplifying circuit, carry out temperature compensation and nonlinear compensation, the former is the deviation that the modifying factor variation of ambient temperature produces measurement result; The non-linear deviation that measurement result is produced that the latter is had for modifying factor non-electricity measure mode itself or amplifying circuit itself; Convert the signals collecting inlet that digital signal is transported to counter through amplification and revised electric signal to through mould/number (A/D).The counting circuit that the utility model adopts is actually a common counter with showing part.The utility model can be set in by the function switch that is provided with on the panel and weigh or calculate two states.When being set in when weighing state, circuit is to sensor, signal amplification and processing and partly power supply of A/D conversion, and the digital signal of its output is attached to the data acquisition inlet of counter, demonstrate weight on the liquid crystal board and can carry out computing by numeral on the calculator panel and calculation keys simultaneously, thereby obtain a certain index, for example number number, the number of yarn, the amount of money of goods, etc.; When function setting during in computing mode, sensor, signal amplification and processing and A/D conversion are not partly worked, and recover the complete circuit of counter, and at this moment the utility model and common counter are identical.Entire circuit adopts DC power supply.

The volume of the miniature suspension type digital display of the utility model electronics calculating scale is very little, and sensor, signal amplification and processing, calculating and demonstration etc. all are contained in about 0.35dm ³The space in.During weighing, on sensor, produce the accuracy of adding component and influencing measurement, the mechanical structure of scale body adopts the dicyclo suspension type, only bear gravity when having guaranteed measurement on the sensor, the cross component force perpendicular, torsion and shearing force have been eliminated with gravity, measurement result accurately and reliably, according to test, measuring accuracy can reach 1%-1.5%.Liquid crystal digital display, keyboard, function switch and range switch are arranged on the panel of the present utility model; the one sensor protection housing that can overturn is arranged at its bottom; when not using function of weighing, housing can cover on sensor contact and steelyard hook wherein, thereby plays a protective role.

The utility model compared with prior art, its outstanding advantage is for to combine non-electrical quantity measurement technology with microelectric technique, DC power supply, dicyclo suspension type mechanical structure need not calibrated horizontal, volume is very little, is convenient to carry.The test result numeral shows that the utilization keyboard also can be done further to calculate by symmetrical value, and is flexible and changeable, also can be used as common counter and uses.Weighing precision is apparently higher than common lever or spring-like weight instrument.The utility model can be widely used for weighing and calculating of factory, enterprises and institutions, for example: be used for portable fiber number scale, number number or the quadrant balance etc. of textile mills, also can be used for the people's bargain transaction, guaranteed the just, quick, accurate of transaction.

Accompanying drawings embodiment of the present utility model:

Fig. 1 is that circuit of the present utility model is formed synoptic diagram.

Fig. 2 is the utility model mechanical structure and sensor demonstration example.

Fig. 3 is the utility model panel and external form two diagrammatic sketch.

As shown in Figure 1, (1) is the strain transducer electric bridge of band temperature compensation, after this electric bridge power supply, when the stressed generation deformation of sensor flexible member, difference appears in the resistance of strain bridge working arm and compensator arm, the ultra-weak electronic signal of electric bridge output is amplified through integrated operational amplifier (2), because be linear relationship not exclusively between stressed size of sensor and the amplifier output signal, so non-linear compensation circuit (7) will be set.What amplifier was exported is analog quantity voltage, and (3) are mould/number (A/D) change-over circuit, and its effect is to convert analog quantity to digital quantity, is convenient to the DLC (digital logic circuit) identification of counter.The utility model both can be used as electronic scales, also can make common counter uses, (4) be function-changing device, its effect is when doing the electronic scales use, to (1), (2), (3), (7) power supply, simultaneously with the data acquisition mouth of digital data transmission, so that show exclusive disjunction to counter; When doing common counter use, acting as of (4) stopped power supply to (1), (2), (3), (7), and recovers the complete circuit of counter so that use as common counter.(5) among Fig. 1 are counting circuit, and (6) are digital lcd.

As shown in Figure 2, organism frame of the present utility model adopts high-strength material to make, as the ABS engineering plastics.Its mechanical structure adopts 00 ' rotational symmetry type, steelyard hook (4) all adopts the kink form with suspension ring (5), when steelyard hook load, because of making two kink points of A, B, action of gravity is in the plumb line, the sensor flexible member only bears simple pulling force on (1), does not have cross component force, reverses or shear force, and this structure can guarantee that sensor can reflect exactly by the gravity of weighing object, (6) are frame among the figure, and (7) are the load-bearing crossbeam.Sensor as shown in Figure 2 sticks on flexible member (1) by foil gauge (2) and (3) by both direction in length and breadth and goes up and constitute, two arms of foil gauge (2) and (3) formation strain bridge, and (2) are active gage, (3) are the temperature compensation sheet.

As shown in Figure 3, LCD panel (1) is arranged on the panel of the present utility model, numeral and calculation keys (2), function switch (3), range switch (4), sensor external part (5) and steelyard hook (6) kink together, (9) are the kink connection for suspension ring and stressed frame.(7) among Fig. 3 are the sensor protection housings that can overturn, and when doing the counter use when not in use or only, (7) are covered in the bottom, and sensor and steelyard hook are housed in wherein, play a protective role, shown in Fig. 3 (a); When weighing, (7) can be translated into back side perk and location, steelyard hook reveals and can weigh, shown in Fig. 3 (b).The utility model overall volume is very little, about 0.35dm ³(8) be the battery back shroud.

This miniature suspension type digital display electronics calculating scale adopts the very little sensor of volume, integrated operational amplifier circuit, A/D converter, calculator chip and LCD panel, thereby whole scale body is very little, about 0.35dm ³Scale mechanics structure adopts rotational symmetry dicyclo suspension type, has guaranteed that the stressed back of sensor output signal is accurate, and according to test, measuring accuracy can reach 1%---and 1.5%.Scale body bottom is provided with a sensor protection housing that can overturn, and the protection sensor is unlikely to be subjected to unexpected collision.When being set in when weighing state, this scale can be as the instrument of weighing, and its result is presented on the liquid crystal board with digital form, utilizes the keyboard of scale surface to carry out various computings to this weight, owing to adopted calculator chip, the function of this scale is flexible and changeable; When being set in computing mode, this scale can be used as common counter and uses.The sensor of the miniature suspension type digital display of the utility model calculating scale can be different different because of purposes.When the lighter object of weigh (in thread yarn weight or hank knotting weight), can adopt the higher non-adhesive type pull spring sensor of sensitivity etc. as textile mills; When the heavier object of weigh, when buying and selling food, can adopt sensor such as adhering resistance strain sheets or employing semiconductor gauge on flexible member as citizen.

Claims (2)

1, a kind of miniature suspension type digital display electronics calculating scale, it is characterized in that: this scale constitutes DC power supply by sensor, signal amplification and processing, mould/number conversion, function conversion, calculating and display circuit; The scale body is a dicyclo suspension type structure, the very little about 0.35dm of volume ³On the scale dignity plate liquid crystal digital display, keyboard, function switch and range switch are arranged, a sensor protection housing that can overturn is arranged at the scale bottom.

2, scale according to claim 1 is characterized in that: this scale can adopt sensor such as adhering resistance strain sheets or employing semiconductor gauge on flexible member, also can adopt non-adhesive type pull spring sensor.

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