CN202928766U - Key weight meter with multiparameter display - Google Patents

Abstract

The utility model discloses a key weight meter with multiparameter display, and comprises a microprocessor and a LCD display which are connected, and also comprises a Fp value analysis module, a Fc value analysis module, a Fr value analysis module, a Fm value analysis module and a Cc/Cr value calculating module connected to the microprocessor in a communication mode, the Fp value, Fc value, Fr value, Fm value and Cc/Cr value respectively obtained by each module can be transmitted to the microprocessor, and a LCD display is controlled by the microprocessor, and the Fp value, Fc value, Fr value, Fm value and Cc/Cr value can be simultaneously displayed. During a test process, the parameters testing of Fp value, Fc value, Fr value and Fm value of keys can be completed, and the calculation of Cc/Cr value is carried out according to the arrangement of the operators, and all test data is displayed on the LCD display. By using the above structure, each mechanics parameter and qualified information of the key to the detected can be rapidly and comprehensively understood by the operators after the test is completed, thereby the test efficiency of the key can be greatly enhanced.

Description

The button load cell that a kind of multiparameter shows

Technical field

The utility model relates to a kind of digital display type button load cell, relates in particular to the button load cell that a kind of multiparameter shows.

Background technology

Silica gel push-button, thin film switch (shell fragment button) and other type button are widely used in realizing operation and the control of product on the products such as instrument and meter, office equipment and household electrical appliance.Feel quality when using these buttons directly has influence on the user to the degree of recognition of product quality, and the feel quality is closely related with the factors such as structure, material and processing technology of button.After button is completed structural design typing, the deviation of production phase material formula and the variation of processing technology, and the factors such as installation site deviation of button when being assembled on product all can have influence on the feel of button; Therefore, all need button is tested after button production and assembling.

The feel of button presses down with it and the power when upspringing has direct relation.Fig. 1 be typical silica gel push-button press down and the process of upspringing in button loading (elastic force) change curve, in figure, ordinate represents the power value, the displacement when horizontal ordinate represents button pressed.After button began to press down, the power value that acts on button increased gradually, until reach a peak force F _pAfter reduce along with the increase of displacement again, until reach a valley power F _cIf continue to press down button, the power value can increase to F again gradually _maxUpspringing the stage of button, along with the resilience of button, the power value is from F _maxBeginning reduces gradually, reaches a valley power F _rAfter begin to increase, until reach a peak force F _mThe power value can begin again to reduce afterwards, and rear power value makes zero until button resiles.Feel when generally characterizing button operation with " Click ratio ", the Click ratio has two classes: C _cAnd C _r, calculate with following formula respectively:

$C_c=\frac{F_p-F_c}{F_p}\×100\%,$ $C_r=\frac{F_p-F_r}{F_p}\×100\%$

When carrying out key testing, the button load cell need to be arranged on manually corresponding or electric test bench, as shown in Figure 2, control the button load cell downwards and move upward by motion structure, by the measuring head on button load cell test axle, tested button being applied acting force.Applied for that Chinese patent, the patent No. are that 02204749.2 " button key spring force measurer " just adopted electric test bench.No matter which kind of test board uses is, in test process, existing button load cell can only be measured button mechanics parameter (F _p, F _c, F _rAnd F _m) in one or two, and can not realize the test of whole mechanics parameters; And the display on existing button load cell all can only show a test data, and operating personnel must make load cell enter corresponding display mode by operation push-button if understand other parameter, could be shown successively.

The utility model content

The purpose of this utility model is to overcome deficiency of the prior art, and a kind of button load cell of multiparameter demonstration is provided, and can complete the F of button in a test process _p, F _c, F _rAnd F _mThen the test of parameter according to operating personnel's setting, completes C _cOr C _rCalculating, and show all test datas on LCD display.

For achieving the above object, the button load cell that described multiparameter shows, comprise microprocessor, resistance strain type sensor, A/D converter and LCD display, described resistance strain type sensor is connected with described microprocessor communication through A/D converter, described LCD display is connected with the microprocessor communication, and its unique point is

The button load cell that described multiparameter shows also comprises the F that all is connected with described microprocessor communication _pValue analysis module, F _cValue analysis module, F _rValue analysis module and F _mThe value analysis module is by described F _pValue analysis module, F _cValue analysis module, F _rValue analysis module and F _mThe F that the value analysis module obtains respectively _pValue, F _cValue, F _rValue and F _mValue all transfers to microprocessor, controls LCD display by described microprocessor and shows simultaneously this F _pValue, F _cValue, F _rValue and F _mValue; And,

The button load cell that described multiparameter shows also comprises the C that is connected with described microprocessor communication _cValue computing module or C _rThe value computing module is by described C _cValue computing module or C _rThe C that the value computing module obtains _cValue or C _rValue transfers to microprocessor, controls LCD display by described microprocessor and is showing F _pValue, F _cValue, F _rValue and F _mSimultaneous display C in the time of value _cValue or C _rValue.

Preferably, the button load cell of described multiparameter demonstration also comprises critical value monitoring module, LED light and the hummer that all is connected with described microprocessor communication, the described F of described critical value monitoring module Real Time Monitoring _pValue, F _cValue, F _rValue and F _mValue, and C _cValue or C _rWhether value is in the span that allows, if described critical value monitoring module detects any one parameter when exceeding the span of corresponding permission, described microprocessor is controlled LED light and lighted, and controls simultaneously the hummer buzzing.

The beneficial effects of the utility model are, in test process, can complete the F of button _p, F _c, F _rAnd F _mThen the test of parameter according to operating personnel's setting, carries out C _cOr C _rThe calculating of value, and show all test datas on LCD display.By said structure, operating personnel can understand every mechanics parameter of tested button and the information such as qualified whether fast, all sidedly after completing test, have greatly improved the testing efficiency of button.

Description of drawings

Fig. 1 show typical silica gel push-button press down and the process of upspringing in the change curve of button loading.

Fig. 2 shows the button load cell of multiparameter demonstration described in the utility model and the structural representation of the key test system that the Versatile manual test board forms.

Fig. 3 shows the content that in Fig. 2, display screen shows.

Fig. 4 shows the upward view of the button load cell of the multiparameter demonstration shown in Fig. 2.

Fig. 5 shows the side sectional view of the button load cell of the multiparameter demonstration shown in Fig. 4.

Fig. 6 shows the functional-block diagram of the button load cell of multiparameter demonstration described in the utility model.

Embodiment

The utility model is described in more detail below in conjunction with the drawings and specific embodiments:

As shown in Figure 4 and Figure 5, the button load cell of described multiparameter demonstration is comprised of following parts and module: resistance strain type sensor 66, A/D converter, microprocessor 100, LCD display 618, power supply and charging circuit 101, input/output interface circuit 102, operation push-button dish 616, LED light 617, hummer 612 and other electron device form.Described A/D converter adopts ∑/Δ type A/D converter 619, as shown in Figure 6, described resistance strain type sensor 66 is connected with microprocessor 100 communications through ∑/Δ type A/D converter 619, simultaneously, described microprocessor 100 also is connected communication with LCD display 618, power supply and charging circuit 101, input/output interface circuit 102, operation push-button dish 616, LED light 617 respectively and is connected with hummer.

Particularly, in an embodiment of the present utility model, the button load cell shell that described multiparameter shows is comprised of aluminium alloy upper cover 69 and lower cover 64 two parts, upper cover 64 is used for installing control circuit board 611 and LCD display 618, and lower cover 64 is used for installing resistance strain type sensor 66 and lithium ion battery 63.A/D converter, microprocessor 100, input/output interface connector 610, hummer 612, lithium ion battery socket 613, sensor socket 615, operation push-button dish 616, pilot lamp 617 and power supply and charging circuit 101 have been welded on control circuit board 611.Wherein, described control circuit board 611 is fixed on the inwall of upper cover 69 by six screws 614, and LCD display 618 is placed in the mount pad of upper cover 69 inwalls, and is fixed by control circuit board 611.Resistance strain type sensor 66 is fixed on the mount pad of lower cover 64 by two hexagon socket head cap screws 65, and be connected with the sensor socket 615 of control circuit board 611 by a connector, 4-pin, wherein two heart yearns are connected with the both positive and negative polarity of power supply, and the two other heart yearn is connected with the signal input port of A/D converter.Lithium ion battery 63 use viscose glues stick on the inwall of lower cover 64, and are connected with the battery socket 613 of control circuit board 611 by two core connectors.

Especially, as shown in Figure 6, the button load cell that described multiparameter shows also comprises the F that all is connected with described microprocessor 100 communications _pValue analysis module 103, F _cValue analysis module 104, F _rValue analysis module 105 and F _mValue analysis module 106 is by described F _pValue analysis module 103, F _cValue analysis module 104, F _rValue analysis module 105 and F _mThe F that value analysis module 106 obtains respectively _pValue, F _cValue, F _rValue and F _mValue all transfers to microprocessor 100, controls LCD display 618 by described microprocessor 100 and shows simultaneously this F _pValue, F _cValue, F _rValue and F _mValue.

Simultaneously, the button load cell of described multiparameter demonstration also comprises the C that is connected with described microprocessor 100 communications _cValue computing module 107 or C _rValue computing module 108 is by described C _cValue computing module 107 or C _rThe C that value computing module 108 obtains _cValue or C _rValue transfers to microprocessor 100, controls LCD display 618 by described microprocessor 100 and is showing F _pValue, F _cValue, F _rValue and F _mSimultaneous display C in the time of value _cValue or C _rValue.

More particularly, the button load cell of described multiparameter demonstration also comprises the critical value monitoring module 109 that is connected with described microprocessor 100 communications, the described critical value monitoring module 109 described F of Real Time Monitoring _pValue, F _cValue, F _rValue and F _mValue, and C _cValue or C _rWhether value is in the span that allows, if described critical value monitoring module 109 detects any one parameter when exceeding the span of corresponding permission, described microprocessor 100 is controlled LED light 617 and lighted, and controls simultaneously hummer 612 buzzings.

The key test system that the utility model embodiment and Versatile manual test board form as shown in Figure 2, the manual test platform is made of parts such as column 1, movement conversion mechanism 2, height adjustment knob 3, drive knob 4, installation backboard 5 and work tops 7, button load cell described in the utility model is arranged on the installation backboard 5 of manual test platform by four screws, by rotary actuation knob 4, can control the utility model embodiment and realize moving up and down.

Before testing, a backhaul power threshold value (F should be set on the utility model embodiment _max, its numerical value should be greater than the F of tested button _p).When being applied to power value on button 8 greater than F _maxThe time, the utility model embodiment will send the backhaul test signal by LED light 617, hummer 612 and input/output interface.

When testing, tested button 8 is placed on the work top 7 of manual test platform, adjusts the position of tested button 8, make its be in the utility model embodiment test measuring head on axle 68 under; Then the drive knob 4 of rotary manual test board, make the downward uniform motion of the utility model embodiment until when sending backhaul test signal (LED light 617 is lighted, hummer 612 send the sound), the drive knob 4 of opposite spin manual test platform moves upward the utility model embodiment until get back to the position of testing when beginning.

In process, the external force that resistance strain type sensor 66 will be applied on test axle 68 converts voltage signal to, and offer ∑/Δ type A/D converter 619 samplings, then microprocessor 100 reads the transformation result of ∑/Δ type A/D converter 619, is converted into corresponding power value; Then, microprocessor 100 transfers to respectively F with above-mentioned power value _pValue analysis module 103, F _cValue analysis module 104, F _rValue analysis module 105 and F _mValue analysis module 106 is by described F _pValue analysis module 103, F _cValue analysis module 104, F _rValue analysis module 105 and F _mThe F that value analysis module 106 obtains respectively _pValue, F _cValue, F _rValue and F _mValue all transfers to microprocessor 100, controls LCD display 618 by described microprocessor 100 and shows simultaneously this F _pValue, F _cValue, F _rValue and F _mValue is controlled LCD display 618 by described microprocessor 100 and is shown simultaneously this F _pValue, F _cValue, F _rValue and F _mValue; Simultaneously, above-mentioned F _pValue, F _cValue, F _rValue and F _mThe value synchronous transmission is to described C _cValue computing module 107 or C _rValue computing module 108 is by this C _cValue computing module 107 or C _rThe C that value computing module 108 obtains according to the computing formula of mentioning in background technology _cValue or C _rValue transfers to microprocessor 100, controls LCD display 618 by described microprocessor 100 and is showing F _pValue, F _cValue, F _rValue and F _mSimultaneous display C in the time of value _cValue or C _rValue.In process, whether exceeded the span of corresponding permission by each parameter more than described critical value monitoring module 109 Real Time Monitorings, if described critical value monitoring module 109 detects any one parameter when exceeding the span of corresponding permission, described microprocessor 100 is controlled LED light 617 and is lighted, and controls simultaneously hummer 612 buzzings.In addition, the result that microprocessor 100 detects according to critical value monitoring module 109 draws whether qualified conclusion information (PASS or FAIL) of tested button 8, and is presented on LCD display 618.Preserve key by pressing data of the present utility model, every test data of tested button (comprise qualification determination conclusion, test duration and power value unit) can be saved on the data-carrier store on load cell, these data can be browsed by LCD display 618, perhaps download on computing machine by data communication interface and process.

The content that shows on LCD display 618 can be with reference to Fig. 3, and as shown in Figure 3, the content that shows in LCD display 618 can comprise: the F of tested button 8 _pWhether data stroke count 3a, the tested button 8 stored on the dump energy sign 2a of power value parameter 1a, load cell battery, load cell testing data memory be qualified, is shown as the F of " PASS " or " FAIL " 4a, current time (hour: minute) 5a, tested button 8 _mThe F of power value parameter 6a, tested button 8 _rPower value parameter 7a, the current power 8a of value unit that adopts of load cell, the current power value 9a on the load cell sensor, the C of tested button 8 of being applied to _cOr C _rParameter 10a can be selected and the F of tested button 8 by operating personnel _cPower value parameter 11a.

After completing test, the utility model embodiment will show every test data of tested button 8 on LCD display 618; If operating personnel will preserve test data, can press the data of the utility model embodiment and preserve key; If test next time, can press the data dump key.

It should be noted that in another embodiment of the present utility model, described load cell can form with the electric test bench with the corresponding interface the key test system of robotization.After opening the control signal output function of load cell, when satisfying the backhaul test condition, load cell will send by input/output interface the pulse signal of a backhaul test; Electric test bench is controlled the load cell counter motion by receiving this pulse signal, realizes the backhaul test of button.

Being only the utility model preferred embodiment in sum, is not to limit practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modify, all should belong to technology category of the present utility model.

Claims (1)

1. the button load cell that shows of a multiparameter, comprise microprocessor, resistance strain type sensor, A/D converter and LCD display, described resistance strain type sensor is connected with described microprocessor communication through A/D converter, described LCD display is connected with the microprocessor communication, it is characterized in that:

The button load cell that described multiparameter shows also comprises the F that all is connected with described microprocessor communication _pValue analysis module, F _cValue analysis module, F _rValue analysis module and F _mThe value analysis module is by described F _pValue analysis module, F _cValue analysis module, F _rValue analysis module and F _mThe F that the value analysis module obtains respectively _pValue, F _cValue, F _rValue and F _mValue all transfers to microprocessor, controls LCD display by described microprocessor and shows simultaneously this F _pValue, F _cValue, F _rValue and F _mValue; And,

The button load cell that described multiparameter shows also comprises the C that is connected with described microprocessor communication _cValue computing module or C _rThe value computing module is by described C _cValue computing module or C _rThe C that the value computing module obtains _cValue or C _rValue transfers to microprocessor, controls LCD display by described microprocessor and is showing F _pValue, F _cValue, F _rValue and F _mSimultaneous display C in the time of value _cValue or C _rValue.

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