CN2671032Y - Frequency variable sound wave computer touch screen controller - Google Patents
Frequency variable sound wave computer touch screen controller Download PDFInfo
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- CN2671032Y CN2671032Y CN 200320124911 CN200320124911U CN2671032Y CN 2671032 Y CN2671032 Y CN 2671032Y CN 200320124911 CN200320124911 CN 200320124911 CN 200320124911 U CN200320124911 U CN 200320124911U CN 2671032 Y CN2671032 Y CN 2671032Y
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- frequency conversion
- sound wave
- frequency
- microprocessor
- touch screen
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Abstract
The utility model discloses a frequency variable sound wave computer touch screen controller, comprising an analog signal processor, an analogue-to-digital converter, a microprocessor, an RS232 communication control device, a frequency conversion output device, a touch screen energy converter and a receiving sensor. The frequency conversion output device comprises a frequency adjuster and a frequency conversion sound wave generator, and the frequency adjuster can export the frequency conversion voltage to the frequency conversion sound wave generator according to the frequency conversion control signal from the microprocessor. Thus the frequency conversion sound wave generator generates the frequency conversion sound wave signal, and the signal is sent into the touch screen energy converter. Because the utility model can automatically adjust the output frequency of the sound wave according to the different performances of the touch screen, the utility model enhances the operating stability of the controller relative to the prior art; it improves the adaptability of the touch control system for the environment; it reduces the difficulty of the manufacturing technique and the request for the material adaptability, and it improves the utilization rate of products. In addition, the utility model also has characteristics of simple structure, favorable performance, easy production, easy maintenance, easy generalization, use, etc.
Description
Technical field
The utility model relates to a kind of controller that is used to strengthen the reliability of computer touch sensing technology, particularly a kind of frequency conversion sound wave computer touch screen controller.
Technical background
At present all sound wave touch screen controllers are generally by by analogue signal processor, analog to digital converter, microprocessor, the RS232 communication controller, the frequency follower, touch-screen transducer and receiving sensor constitute, its frequency follower all adopts the output frequency of fixing 5.5296MHz, but to cause this frequency be not to adapt to all screen body of touch screen (seeing accompanying drawing 1) to the making difference of reflection strip 61 and its spacing dn on the difference of the glass carrier of touch-screen and the touch-screen, so just make that the production qualification rate of touch-screen is low, the cost height, quality is uneven, maintenance is big, is unfavorable for promoting the use of.
The utility model content
The purpose of this utility model is: at the deficiencies in the prior art, provide a kind of can be according to the difference of the performance of touch-screen and adjust the frequency conversion sound wave computer touch screen controller of sonic frequency automatically.
In order to solve the problems of the technologies described above, technical solution adopted in the utility model is: a kind of frequency conversion sound wave computer touch screen controller, constitute by analogue signal processor, analog to digital converter, microprocessor, RS232 communication controller, frequency follower, touch-screen transducer and receiving sensor, described frequency follower is the frequency conversion follower, the signal input part of described frequency conversion follower connects microprocessor, thereby receive frequency change control signal from microprocessor, its output terminal connects the touch-screen transducer, thus output frequency conversion sound wave signal.
Described frequency conversion follower can be made of frequency adjuster and frequency conversion audio wave generator, described frequency adjuster is according to exporting frequency conversion voltage to the frequency conversion audio wave generator from the frequency change control signal of microprocessor, thereby produce frequency conversion sound wave signal from the frequency conversion audio wave generator, and send into the touch-screen transducer.
Described frequency adjuster can be PWM/ voltage transitions filter amplifier, and described frequency conversion audio wave generator is a voltage-controlled crystal (oscillator), and the input end of described PWM/ voltage transitions filter amplifier connects the pwm signal output terminal of microprocessor MCU.
Described frequency adjuster can be digital regulation resistance, and described frequency conversion audio wave generator is a crystal oscillator able to programme.
Described digital regulation resistance can be that integrated component U1 and the peripheral component thereof of MAX6160 constitutes by model, and the model of described crystal oscillator U2 able to programme is LTC1799; 1 pin of described integrated component U1 connects the variable-frequency pulse signal from microprocessor, its 2 pin input is from the UP/DOWN signal of microprocessor, its 3 pin and 4 pin ground connection, 5,7,8 pin connection+5V power supplys, its 6 pin is by 3 pin of resistance R 1 output frequency conversion voltage to crystal oscillator U2 able to programme; The 1 pin connection+5V power supply of described crystal oscillator U2 able to programme is connected to filter capacitor C1 simultaneously, its 2 pin ground connection, and its 4 pin input is from the DIV signal of microprocessor, and its 5 pin is exported frequency conversion sound wave signal.
Described resistance R 1 resistance can be 40K Ω.
The sonic frequency scope of described frequency conversion follower output can be 2.7～12MHz.
Described microprocessor can be connected with computer by the RS232 communication controller, and the signal that described receiving sensor receives is input microprocessor after the mould/transformation of variables of the processing and amplifying of analogue signal processor, analog to digital converter.
Described analogue signal processor can be made of auto-gain circuit, preposition amplification tuning amplification circuit, detector amplifier, the input end of described preposition amplification tuning amplification circuit connects receiving sensor, its output terminal connects the input end of detector amplifier, the output terminal connection mode number converter of described detector amplifier, the input end of described auto-gain circuit connects microprocessor, and its output terminal connects preposition amplification tuning amplification circuit.
Described touch-screen transducer can be made of X-axis transducer and Y-axis transducer, is arranged at the upper left corner and the lower right corner of the glass carrier of touch-screen respectively, and described receiving sensor also has a pair of, and is arranged at the lower left corner of the glass carrier of touch-screen.
The utility model is owing to take technique scheme, realized that frequency conversion sound wave computer touch screen controller can be according to the difference of the performance of touch-screen, automatically adjust the output frequency of sound wave, until finding optimum value, with output frequency, thereby can guarantee that controller is operated in optimum condition as this controller.Therefore relatively prior art has strengthened the job stability of controller; Improved the adaptability of touch-control system to environment; Reduced producting process difficulty and, improved the utilization factor of product the requirement of material adaptability, also have in addition simple in structure, performance good, easy production, easy care, characteristics such as promotes the use of easily.
Description of drawings
Accompanying drawing 1 is system's general assembly drawing of the utility model frequency conversion sound wave computer touch screen controller;
Accompanying drawing 3 is the circuit block diagram of the frequency conversion follower of the utility model frequency conversion sound wave computer touch screen controller;
Accompanying drawing 5 is the circuit theory diagrams of second kind of embodiment of the frequency conversion follower of the utility model frequency conversion sound wave computer touch screen controller.
Embodiment
Below with reference to Figure of description and specific embodiment the utility model frequency conversion sound wave computer touch screen controller is described in further detail.
With reference to the accompanying drawings 1, the utility model frequency conversion sound wave computer touch screen controller is made of microprocessor 1, RS232 communication controller 2, analog to digital converter 3, frequency follower, analogue signal processor 5, touch-screen transducer 8 and receiving sensor 7.
Described microprocessor 1 is connected with computer by RS232 communication controller 2, described frequency follower is a frequency conversion follower 4, the signal input part of described frequency conversion follower 4 connects microprocessor 1, thereby receive frequency change control signal from microprocessor 1, its output terminal connects touch-screen transducer 8, thereby output frequency conversion sound wave signal, the signal that described receiving sensor 7 receives is input microprocessor 1 after the mould/transformation of variables of the processing and amplifying of analogue signal processor 5, analog to digital converter 3.
Described touch-screen transducer 8 is made of X-axis transducer and Y-axis transducer, is arranged at the upper left corner and the lower right corner of the glass carrier 6 of touch-screen respectively, and described receiving sensor 7 also has a pair of, and is arranged at the lower left corner of the glass carrier 6 of touch-screen.
With reference to the accompanying drawings 2, described analogue signal processor 5 is made of automatic gain (AGC) circuit, preposition amplification tuning amplification circuit, detector amplifier, the input end of described preposition amplification tuning amplification circuit connects receiving sensor 7, its output terminal connects the input end of detector amplifier, the output terminal connection mode number converter of described detector amplifier, the input end of described auto-gain circuit connects microprocessor, and its output terminal connects preposition amplification tuning amplification circuit.
With reference to the accompanying drawings 3, described frequency conversion follower 4 is made of frequency adjuster and frequency conversion audio wave generator, described frequency adjuster is according to exporting frequency conversion voltage to the frequency conversion audio wave generator from the frequency change control signal of microprocessor 1, thereby producing frequency range from the frequency conversion audio wave generator is 2.7～12MHz frequency conversion sound wave signal, and sends into touch-screen transducer 8.
The utility model provides the embodiment of two kinds of frequency conversion followers 4 simultaneously.
Embodiment 1:
With reference to the accompanying drawings 4, the frequency adjuster of described frequency conversion follower 4 is a PWM/ voltage transitions filter amplifier, its frequency conversion audio wave generator is a voltage-controlled crystal (oscillator), described microprocessor MCU adopts the enhancement function PWM (width modulation) of MCS-51 series monolithic to do voltage controlled frequency control, to reduce cost of products, select for use voltage-controlled crystal (oscillator) to do the frequency conversion audio wave generator, its output frequency be subjected to MCU to be controlled at certain limit adjustable, the input end of described PWM/ voltage transitions filter amplifier connects the pwm signal output terminal of microprocessor (MCU).
When circuit is started working, frequency conversion follower 4 output sonic frequencies are 5.5296MHz, when signal that receiving sensor 8 receives through analogue signal processor 5 amplify, after analog to digital converter 3 moulds/transformation of variables, microprocessor MCU notes the usefulness of making comparisons with the amplitude and the yield value of its signal, and then constantly adjust the sound wave output frequency, until find maximum amplitude and minimum gain value, note this moment output frequency as the output frequency of this controller, power at every turn or all move this program once when changing touch-screen, be operated in optimum condition to guarantee controller.
Embodiment 2:
With reference to the accompanying drawings 5, the frequency adjuster of described frequency conversion follower 4 is a digital regulation resistance, and its frequency conversion audio wave generator is a crystal oscillator able to programme.
Described digital regulation resistance is that integrated component U1 and the peripheral component thereof of MAX5160 constitutes by model, and the model of described crystal oscillator U2 able to programme is LTC1799.
1 pin of described integrated component U1 connects the variable-frequency pulse signal from microprocessor 1, its 2 pin input is from the UP/DOWN signal of microprocessor 1, its 3 pin and 4 pin ground connection, 5,7,8 pin connection+5V power supplys, its 6 pin is 3 pin of 40K Ω resistance R 1 output frequency conversion voltage to crystal oscillator U2 able to programme by resistance; The 1 pin connection+5V power supply of described crystal oscillator U2 able to programme is connected to filter capacitor C1 simultaneously, its 2 pin ground connection, and its 4 pin input is from the DIV signal of microprocessor 1, and its 5 pin is exported frequency conversion sound wave signal.
Programming by 1 couple of integrated component U1 of microprocessor during work changes its resistance, thereby changes the output frequency of crystal oscillator chip.
Claims (10)
1, a kind of frequency conversion sound wave computer touch screen controller, constitute by analogue signal processor, analog to digital converter, microprocessor, RS232 communication controller, frequency follower, touch-screen transducer and receiving sensor, it is characterized in that: described frequency follower is the frequency conversion follower, the signal input part of described frequency conversion follower connects microprocessor, thereby receive frequency change control signal from microprocessor, its output terminal connects the touch-screen transducer, thus output frequency conversion sound wave signal.
2, frequency conversion sound wave computer touch screen controller according to claim 1, it is characterized in that: described frequency conversion follower is made of frequency adjuster and frequency conversion audio wave generator, described frequency adjuster is according to exporting frequency conversion voltage to the frequency conversion audio wave generator from the frequency change control signal of microprocessor, thereby produce frequency conversion sound wave signal from the frequency conversion audio wave generator, and send into the touch-screen transducer.
3, as frequency conversion sound wave computer touch screen controller as described in the claim 2, it is characterized in that: described frequency adjuster is a PWM/ voltage transitions filter amplifier, described frequency conversion audio wave generator is a voltage-controlled crystal (oscillator), and the input end of described PWM/ voltage transitions filter amplifier connects the pwm signal output terminal of microprocessor (MCU).
4, as frequency conversion sound wave computer touch screen controller as described in the claim 2, it is characterized in that: described frequency adjuster is a digital regulation resistance, and described frequency conversion audio wave generator is a crystal oscillator able to programme.
5, as frequency conversion sound wave computer touch screen controller as described in the claim 4, it is characterized in that: described digital regulation resistance is that integrated component (U1) and the peripheral component thereof of MAX5160 constitutes by model, and the model of described crystal oscillator able to programme (U2) is LTC1799; 1 pin of described integrated component (U1) connects the variable-frequency pulse signal from microprocessor, its 2 pin input is from the UP/DOWN signal of microprocessor, its 3 pin and 4 pin ground connection, 5,7,8 pin connection+5V power supplys, its 6 pin is by 3 pin of resistance R 1 output frequency conversion voltage to crystal oscillator able to programme (U2); 1 pin connection+5V power supply of described crystal oscillator able to programme (U2) is connected to filter capacitor (C1) simultaneously, its 2 pin ground connection, and its 4 pin input is from the DIV signal of microprocessor, and its 5 pin is exported frequency conversion sound wave signal.
6, as frequency conversion sound wave computer touch screen controller as described in the claim 5, it is characterized in that: described resistance (R1) resistance is 40K Ω.
7, as frequency conversion sound wave computer touch screen controller as described in one of in the claim 1,2,3,4,5,6, it is characterized in that: the sonic frequency scope of described frequency conversion follower output is 2.7～12MHz.
8, as frequency conversion sound wave computer touch screen controller as described in the claim 7, it is characterized in that: described microprocessor is connected with computer by the RS232 communication controller, and the signal that described receiving sensor receives is input microprocessor after the mould/transformation of variables of the processing and amplifying of analogue signal processor, analog to digital converter.
9, as frequency conversion sound wave computer touch screen controller as described in the claim 8, it is characterized in that: described analogue signal processor is made of auto-gain circuit, preposition amplification tuning amplification circuit, detector amplifier, the input end of described preposition amplification tuning amplification circuit connects receiving sensor, its output terminal connects the input end of detector amplifier, the output terminal connection mode number converter of described detector amplifier, the input end of described auto-gain circuit connects microprocessor, and its output terminal connects preposition amplification tuning amplification circuit.
10, as frequency conversion sound wave computer touch screen controller as described in the claim 9, it is characterized in that: described touch-screen transducer is made of X-axis transducer and Y-axis transducer, be arranged at the upper left corner and the lower right corner of the glass carrier of touch-screen respectively, described receiving sensor also has a pair of, and is arranged at the lower left corner of the glass carrier of touch-screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320124911 CN2671032Y (en) | 2003-12-02 | 2003-12-02 | Frequency variable sound wave computer touch screen controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320124911 CN2671032Y (en) | 2003-12-02 | 2003-12-02 | Frequency variable sound wave computer touch screen controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2671032Y true CN2671032Y (en) | 2005-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320124911 Expired - Fee Related CN2671032Y (en) | 2003-12-02 | 2003-12-02 | Frequency variable sound wave computer touch screen controller |
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| CN (1) | CN2671032Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270072A (en) * | 2011-08-31 | 2011-12-07 | 成都吉锐触摸技术股份有限公司 | Surface acoustic wave touch screen with locating axes of different frequencies |
-
2003
- 2003-12-02 CN CN 200320124911 patent/CN2671032Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270072A (en) * | 2011-08-31 | 2011-12-07 | 成都吉锐触摸技术股份有限公司 | Surface acoustic wave touch screen with locating axes of different frequencies |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |