CN204359329U - A kind of two display thousand points of instrument - Google Patents
A kind of two display thousand points of instrument Download PDFInfo
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- CN204359329U CN204359329U CN201420740959.4U CN201420740959U CN204359329U CN 204359329 U CN204359329 U CN 204359329U CN 201420740959 U CN201420740959 U CN 201420740959U CN 204359329 U CN204359329 U CN 204359329U
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Abstract
The utility model discloses a kind of two display thousand points of instrument, described two display thousand points of instrument comprise: sensor assembly, A/D conversion chip module, microprocessor control module, LCD MODULE and pointer display module; Described pointer display module comprises pointer driver module, angle-sensor module and pointer module.The 4-20mA electric signal that sensor can export by this pair of display thousand points of instrument, is converted into pointer display and liquid crystal display by A/D conversion chip; Simultaneously, angle-sensor module and micro-processing and control module and pointer driver module form closed loop design, by angle-sensor module to microprocessor Real-time Feedback pointer position, and by the correct indicating positions of pointer driver module adjustment pointer, prevent pointer and lose the situations such as step or pointer no to scale.The beneficial effects of the utility model are that numerical monitor ensure that and accurately measure and flexible operation, and simulative display ensure that accurate display under critical conditions and simple readability.
Description
Technical field
The utility model relates to instrument field, particularly relates to the two display of a kind of modified thousand points of instrument.
Background technology
In Industry Control, the display information overwhelming majority that operating personnel obtain relies on vision, and Displaying Meter refers generally to measured signal is transformed into the device being convenient to the display information that people can observe.Displaying Meter directly receives the output signal of detecting element and transmitter or sensor, shows continuously, the situation of change of each measured parameter in record production run.According to the difference of display mode, Displaying Meter is generally that detection limit pointer that the sensors such as temperature, pressure, flow, thing position and mechanical quantity are sent here or numeral indicate.The display format of instrument is primarily of two kinds, and one is pointer-type, and another kind is digital, and they respectively have relative merits.Pointer header is very clear to the variation tendency being instructed to parameter, but its shock resistance is poor, and machinery inertial is large, to the unable reaction of very fast change of parameter, and reading out of true; Although digital gauge outfit reading is directly perceived, accurately, it but can not the variation tendency of display parameter, and particularly in industry spot multiparameter, during the display of multilist head, more difficult which parameter of distinguishing is in increase, and which parameter is in reduction.Based on the two respective relative merits, technician also attempted two kinds of display modes to unite two into one, but due to the A/D conversion chip of the motor and liquid crystal display that drive pointer can interference mutually, so be difficult to accomplish two display.And namely allow to realize two Presentation Function, real-time control also cannot be accomplished in the position for pointer, and just send pulse signal by single-chip microcomputer and drive pointer, a pulse signal makes a move, and is determined the position of pointer by passometer.But this method reality just have recorded single-chip microcomputer and have issued how many pulses, occur unexpected once operation, just easily occur that pointer loses the situation outside step or no to scale, the scale of pointer indication just not to or pointer cannot get back to zero point.
Utility model content
The utility model provides the control method of a kind of two display thousand points of instrument and pointer display thereof, can solve cannot realize two display and the pointer that exist in above-mentioned prior art and lose and walk or the defect such as no to scale.
The purpose of this utility model is achieved through the following technical solutions:
A kind of two display thousand points of instrument, comprising: sensor assembly, A/D conversion chip module, microprocessor control module, LCD MODULE and pointer display module; Described sensor assembly and A/D conversion chip model calling, A/D conversion chip module is connected with microprocessor control module; Described LCD MODULE and described pointer display module are connected with described micro-processing and control module respectively; And described pointer display module comprises pointer driver module, angle-sensor module and pointer module, described pointer module is connected with described pointer driver module, described pointer driver module is connected with described microprocessor control module, and described angle-sensor module and described pointer driver module link together.
Further, also comprise LED module, described LED module comprises LED and switch key, and LED and switch key are all connected in microprocessor control module.
Further, described LCD MODULE comprises liquid crystal screen module and function button module; Described liquid crystal screen module is connected with microprocessor control module; Described function button module is connected with microprocessor control module.
Meanwhile, the externally fed voltage of the two display numeral of the utility model thousand points of instrument is 24V.
Further, described angle-sensor module and pointer driver module are coaxially installed; And angle-sensor module is 360 degree entirely monitors, the voltage signal corresponding from 0 degree to 360 degree is 0.5V to 4.5V.
A control method for two display thousand points of gauge pointer displays, comprises the following steps:
Angle-sensor module Real-time Feedback pointer position, and positional information is sent to microprocessor control module;
Described positional information compares with the real measured data in this moment by microprocessor control module, is compensated value, and offset is sent to pointer driver module;
Pointer driver module drives hand motion to assigned address according to offset.
The 4-20mA electric signal that sensor can export by the two displays of the utility model thousand points of instrument, is converted into pointer display and liquid crystal display by A/D conversion chip; Simultaneously, angle-sensor module and microprocessor control module and pointer driver module form closed loop design, by angle-sensor module to microprocessor control module Real-time Feedback pointer position, and by the correct indicating positions of pointer driver module adjustment pointer, prevent pointer and lose the situations such as step or pointer no to scale.The beneficial effects of the utility model are that numerical monitor ensure that and accurately measure and flexible operation, and simulative display ensure that accurate display under critical conditions and simple readability.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail;
Fig. 1 is the control principle drawing of two display thousand points of instrument in the utility model embodiment;
The two mechanical sectional views that show numeral thousand point instrument of Fig. 2 for providing in the utility model embodiment;
The two general assembly drawings that show numeral thousand point instrument of Fig. 3 for providing in the utility model embodiment.
Embodiment
The technical solution of the utility model is further illustrated by embodiment below in conjunction with accompanying drawing.
At present, on market, existing instrument is mostly only have pointer show or only have liquid crystal display, mainly owing to driving the A/D conversion chip in the motor of pointer and liquid crystal display mutually to disturb in pointer display, is difficult to accomplish two display.Market also there is the Displaying Meter that some pointers and digital double-display show, but cannot control in real time the position of pointer, and the problem having pointer to lose control of in practical process, also have pointer no to scale or the situation of returning less than zero point to exist.
The utility model is a kind of two display thousand points of instrument, can be pointer scale display and LCDs numerical monitor by the 4-20mA transform electrical signals of input, and for the measured value of reality, pointer is consistent with the displayed value of liquid crystal display and synchronously change.As shown in Figure 1, be the control principle drawing of two display thousand points of instrument 101 in the utility model embodiment, comprise: sensor assembly 102, A/D conversion chip module 103, microprocessor control module 104, LCD MODULE 105 and pointer display module 106; Described sensor assembly 102 is connected with A/D conversion chip module 103, and A/D conversion chip module 103 is connected with microprocessor control module 104; LCD MODULE 105 and pointer display module 106 are all connected with micro-processing and control module 104; And described pointer display module 106 comprises pointer driver module 109, angle-sensor module 110 and pointer module 111, described pointer module 111 is connected with pointer driver module 109, pointer driver module 109 is connected with microprocessor control module 104, and described angle-sensor module 110 and pointer driver module 109 link together; Described LCD MODULE 105 comprises liquid crystal screen module 107 and function button module 108; Described liquid crystal screen module 107 is connected with microprocessor control module 104; Described function button module 108 is connected with microprocessor control module 104.
The technical barrier that the utility model solves realizes with technical scheme mainly through following: first, precision for analog-to-digital A/D conversion chip 103 directly determines the stability of numerical monitor, in the present embodiment, choose ADS1232 as sensor-lodging, be converted to digital data transmission to microprocessor control module 104; And analog-to-digital precision depends on again the clean level of power supply, therefore the filtering circuit of power supply rear end is extremely important, energy electromagnetism interference, the ripple filtering out power supply input of trying one's best.Secondly when pointer driver module 109 drives pointer 111 to rotate, pointer driver module 109 can impact A/D conversion accuracy, cause the digital saltus step of liquid crystal display, therefore a time delay to be done to motor-driven order, namely the numerical value that first display is measured in real time on liquid crystal screen module 107, then pointer is driven to go to corresponding scale (because the numerical value change of liquid crystal display can be very fast, come so these time delay naked eyes are not felt, but the problem of motor interference can be solved).The course of work of this system is as follows:
The signal of the input of instrument is the current signal of 4-20mA, we are on the pin of A/D conversion chip 103 and connect a sampling with high precision resistance, such curent change can change into change in voltage, and is converted into digital signal transfers to single-chip microcomputer by A/D conversion chip 103 collection.Then we have done a circulation in program, single-chip microcomputer get 10 sample magnitude be averaged then through conversion after be presented on liquid crystal screen module 107, again digital signal is converted into the angle deflected needed for pointer after liquid crystal display display value stabilization and carrys out drive motor operation, wait for pointer walk to put in place after (indicator whether walk to have put in place angle-sensor module 110 monitor), microprocessor control module 104 is sampled again, then carries out flow process as above.It is separately work that such liquid crystal screen module 107 and pointer driver module 109 run, microprocessor control module 104 completes instantaneously from sampling liquid crystal display, and pointer driver module 109 to have run to the time generally spent also be Millisecond, therefore do not affect normal use, can ensure liquid crystal display numerical stability yet.
The design of pointer display module 106 of the prior art, the problem having pointer to lose control of in Instrument use process, use after a period of time exactly, the sensing of pointer is with actual value than the skew had to a certain extent, and no to scale returns the situation less than zero point even in addition.This is because the design of pointer display module is open-loop design, namely can only give drives the motor of indicator to send out pulse, it is exactly electric machine rotation 20 step that acquiescence sends out 20 pulses, but real electrical machinery has walked how many step neither one Real-time Feedback, so the running status of indicator is uncontrollable.
For the pointer display module in two display thousand points of instrument, the utility model introduces angle-sensor module 110, and angle-sensor module 110 forms closed loop design with microprocessor control module 104 and pointer driver module 109, angle-sensor module 110 is coaxial with pointer driver module 109, such indicator has walked how many degree, and our angle-sensor module 110 can real-time perception by signal feedback to microprocessor control module 104; By angle-sensor module 110 to microprocessor control module 104 Real-time Feedback pointer 111 position, and adjust the correct indicating positions of pointer 111 by pointer driver module 109, prevent pointer and lose the situations such as step or pointer no to scale.
Specific works process about pointer display module is as described below:
First, angle-sensor module 110 Real-time Feedback pointer 111 position, and positional information is sent to microprocessor control module 104;
Secondly, described positional information compares with the real measured data in this moment by microprocessor control module 104, is compensated value, and offset is sent to pointer driver module 109.Real measured data mentioned here, can by reading in liquid crystal screen module 107 in the two display of the utility model thousand points of instrument; Therefore, this just require liquid crystal display display precision and stability guaranteed.Therefore, above-mentioned electric source filter circuit and the time delay done pointer driver module also play an important role to pointer display.
Finally, pointer driver module 109 drives hand motion to assigned address according to offset.
By above-mentioned closed-loop control, the real-time control to pointer position can be realized, current instrument numerical value can be shown more in real time.It should be noted that:
Angle-sensor module is 360 ° of monitorings entirely, the angle of 0 ° to 360 ° changes the voltage signal output of corresponding 0.5V to 4.5V, pointer is mounted on the rotation axis of drive motor, the bottom of rotation axis embedded in a magnet, by this magnet and angle-sensor module interact (Hall effect) determine axle has turned how many degree, corresponding, also just obtain indicators turn and how much spend.So during the different position of pointed, the feedback voltage that angle-sensor module 110 feeds back to microprocessor control module 104 is different, and instrument draws the position (being exactly a numerical value in the program of microprocessor) that a pointer should be gone to after calculating according to the signal conversion of outside 4-20mA, then the numerical value after being converted by the feedback voltage that this numerical value and microprocessor obtain compares, if the numerical value converted than feedback voltage is little, continue to deflect to the right, if than feedback voltage convert numerical value greatly, continue to deflect left, illustrate that indicator goes to position when both are the same.
In addition, consider that night uses, LED module 112 is also comprised inside the two display of the utility model thousand points of instrument, described LED module 112 comprises row's LED 113 and switch key 114, and LED 113 and switch key 114 to be all connected in microprocessor control module 104, press switch key, LED 113 will light, and facilitates user to use night.
The two mechanical sectional views that show numeral thousand point instrument of Fig. 2 for providing in the utility model embodiment; Comprise: upper cover 1, table body 2, table cover 3, dial plate 4, mainboard 5, supporting disk 6, pointer driver module 7, angle-sensor module 8, magnet erection column 9, soft bar light bar 10, interior hexagonal pan head screw 11, stainless steel stud 12,13,14, interior hexagonal pan head screw 15,16, connector 17,18,19, magnet 20, base plate 21, insulcrete 22.
The two general assembly drawings that show numeral thousand point instrument of Fig. 3 for providing in the utility model embodiment; Comprise: pointer 23, liquid crystal screen module 24, function button module 25, interior hexagonal pan head screw 26,27,28.
By reference to the accompanying drawings the utility model is explained in detail above, but the utility model is not limited in above-described embodiment, in the ken that those of ordinary skill in the art possess, can also make a variety of changes under the prerequisite not departing from the utility model aim.
Claims (5)
1. two display thousand points of instrument, is characterized in that, comprising: sensor assembly, A/D conversion chip module, microprocessor control module, LCD MODULE and pointer display module; Described sensor assembly and A/D conversion chip model calling, A/D conversion chip module is connected with microprocessor control module; Described LCD MODULE and described pointer display module are connected with described micro-processing and control module respectively; And described pointer display module comprises pointer driver module, angle-sensor module and pointer module, described pointer module is connected with described pointer driver module, described pointer driver module is connected with described microprocessor control module, and described angle-sensor module and described pointer driver module link together.
2. two display according to claim 1 thousand points of instrument, it is characterized in that, also comprise LED module, described LED module comprises LED and switch key, and LED and switch key are all connected in microprocessor control module.
3. two display according to claim 1 thousand points of instrument, it is characterized in that, described LCD MODULE comprises liquid crystal screen module and function button module; Described liquid crystal screen module is connected with microprocessor control module; Described function button module is connected with microprocessor control module.
4. two display according to claim 3 thousand points of instrument, it is characterized in that, the externally fed voltage of thousand points of instrument is 24V.
5. two display according to claim 1 thousand points of instrument, it is characterized in that, described angle-sensor module and pointer driver module are coaxially installed;
Angle-sensor module is 360 degree and entirely monitors, and the voltage signal corresponding from 0 degree to 360 degree is 0.5V to 4.5V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420740959.4U CN204359329U (en) | 2014-11-28 | 2014-11-28 | A kind of two display thousand points of instrument |
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| CN201420740959.4U CN204359329U (en) | 2014-11-28 | 2014-11-28 | A kind of two display thousand points of instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457810A (en) * | 2014-11-28 | 2015-03-25 | 北京航天易联科技发展有限公司 | Double-display micrometer gauge and micrometer gauge pointer display control method |
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- 2014-11-28 CN CN201420740959.4U patent/CN204359329U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457810A (en) * | 2014-11-28 | 2015-03-25 | 北京航天易联科技发展有限公司 | Double-display micrometer gauge and micrometer gauge pointer display control method |
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