CN2736748Y - Digital tire pressure gauge - Google Patents
Digital tire pressure gauge Download PDFInfo
- Publication number
- CN2736748Y CN2736748Y CN 200420012632 CN200420012632U CN2736748Y CN 2736748 Y CN2736748 Y CN 2736748Y CN 200420012632 CN200420012632 CN 200420012632 CN 200420012632 U CN200420012632 U CN 200420012632U CN 2736748 Y CN2736748 Y CN 2736748Y
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- sensor
- pressure
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- data
- pin
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- Expired - Fee Related
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Abstract
The utility model provides a digital tire pressure gauge, belonging to the technical field of the automobile parts detection. The utility model is characterized in that a pressure air nozzle of a micro-pressure switch is connected into an air chamber communicated for a sensor to induct the air pressure. The micro-pressure switch is provided with two lines. Wherein, an input line is connected with the positive pole of the power supply; an output line is connected with the input of the power supply voltage of the circuit board. The sensor and the micro-controller are connected by a state control line and a data line. The micro-controller and an LCD module are connected by two state control line and one data line. The utility model can obtain the visual data of the pressure and temperature without operating the press key by hand and has the advantages of accurate measuring result, simple structure, easy use, reliability, and durability.
Description
Technical field
The utility model belongs to automobile component detection technique field.
Background technology
At present, general tire pressure gauge mainly is made of pressure transducer, analog-to-digital converting module, control unit module and display module.Owing to be subjected to the restriction that sensor is installed and designed, present existing tire pressure gauge just has the simple function of tire pressure measurement, whether normally not only need the tire pressure index and detect tyre working state, also need the auxiliary of tyre temperature index, could obtain the current state of detected tyre more accurately.And pressure sensing and temperature sensing are integrated in the tire pressure gauge is the key that addresses this problem.And the control function of existing tire pressure gauge all carried out by the hand switch button, still needs a series of button operation during use, and intelligent degree is low, also makes troubles to the user.
Summary of the invention
The purpose of this utility model is:
Provide a kind of can measure tire pressure and temperature, and need not manual button operation, have the digital tire pressure gauge of liquid crystal display function.
The technical solution of the utility model is:
The pressure valve of minute-pressure power switch is received in the air chamber that is communicated with for the sensor sensing gaseous tension, minute-pressure power switch has 2 lines, wherein incoming line is received on the positive source, output line is received the supply voltage input of circuit board, there are State Control line and data line to link to each other between sensor and the microcontroller, link to each other by 2 bar state control lines and 1 data line between microcontroller and the LCD MODULE.
The IN pin of minute-pressure power switch M1 connects power supply BAT positive pole, the OUT pin connect simultaneously sensor IC 2, microcontroller IC1, LCD MODULE M2 the VDD pin; Sensor IC 2 has adopted pressure measuring module inner integrated and the high-performance digital sensor of temperature-measuring module, and sensor IC 2 is by the pressure and temperature of air chamber and extended pressure contact induction tire thereof; The PTA6 of microcontroller IC1, PTA7 pin connect two mode of operation selection wire S0, S1 of sensor IC 2; The PTA3 pin connects the data clock line CLK of sensor IC 2; The PTA4 pin connects the Data In-Line DATA of sensor IC 2; The PTA5 pin connects the serial data output line OUT of sensor IC 2; The RST pin connects the output line RST that resets of sensor IC 2 by a current-limiting resistance R1; The sheet that the PTB3 pin of microcontroller IC1 connects LCD MODULE M2 selects control line CS, and the PTB4 pin connects the write line WR of LCD MODULE M2, and the PTB5 pin connects the data line DATA of LCD MODULE M2; Meet filter capacitor C1 between the power lead VDD of sensor IC 2 and the ground wire VSS, meet filter capacitor C2 between the power lead VDD of microcontroller IC1 and the ground wire VSS.
The beneficial effects of the utility model are:
Need not manual button and can obtain pressure and temperature data intuitively when measuring tire, measurement result is accurate, and is simple in structure, easy to use, reliability and durability.
Description of drawings
Fig. 1 is the utility model circuit block diagram;
Fig. 2 is the utility model circuit diagram;
Wherein: C is that electric capacity, R are that resistance, IC1 are that microcontroller, IC2 are that sensor, M1 are that minute-pressure power switch, M2 are that LCD MODULE, BAT are power supplys.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in Figure 1, this utility model mainly is made up of sensor, microcontroller, minute-pressure power switch, LCD MODULE and lithium battery.Survey input pressure by minute-pressure power switch and come the automatic switch working power, need not manual keyswitch; The digital output sensors that has adopted pressure survey and temperature survey function integrated, but make both measure tire pressure of pressure gauge, can provide temperature information again; The microcontroller of low-power consumption is carried out measurement control, reading of data and the work such as demonstration of liquor charging crystalline substance and manometric Power Supply Monitoring to sensor; Tire pressure and temperature measurement result are directly read in liquid crystal display with lock function; If tire is in improper under-voltage or overvoltage condition, can caution be proposed to the user.
Microcontroller and lithium battery are welded on the circuit board, between microcontroller and the sensor, between microcontroller and the LCD MODULE, lithium battery is connected by lead with line between the minute-pressure power switch.
As shown in Figure 2, the pressure gauge mouth of pipe is aimed at doughnut valve and good contact, make pressure contact (2) fully touch gas in the tire valve.Pressure contact (2) is to be connected to air chamber (3) in the pressure gauge, the pressure that so just makes the sensor (4) that is communicated to air chamber (3) and minute-pressure power switch (5) can sense tire gas by the pressure contact.Sense air chamber (3) pressure when minute-pressure power switch (5) and rise, just switch to switch closed condition to connect working power, this moment, pressure gauge was started working.
After minute-pressure power switch (M1) clossing pressure meter is started working, microcontroller HC908RK2 (IC1) is by two mode of operation selection wire S0, the S1 of sensor PX8020A (IC2), control sensor (IC2) and select to carry out pressure survey and temperature survey, and the analog-digital conversion of comparing step by step by the data of sensing data incoming line DATA input, again the measurement data that is converted to digital signal is sent it back microcontroller (IC1) by data line OUT with serial mode down synchronously at data clock line CLK.Microcontroller (IC1) carries out analyzing and processing to the measurement data that obtains, and selects the brilliant display module of control line, write line WR and data line DATA liquor charging (M2) to show measurement result by the CS sheet.The intuitive measurement results of liquid crystal digital demonstration is clear, and locks up-to-date measurement result, and the user also can pull up the back observed reading from tire valve with pressure gauge.If measurement result shows that tire is in improper under-voltage or overvoltage condition, will to human pilot caution be proposed by liquid crystal display.After finishing surveying work, minute-pressure power switch (M1) will be got back to normally open, disconnect working power.When battery (BAT) undertension, microcontroller (IC1) can send low-voltage by liquid crystal display immediately and report to the police when the user measures once more.
Claims (2)
1, a kind of digital tire pressure gauge, it is characterized in that: the pressure valve of minute-pressure power switch is received in the air chamber that is communicated with for the sensor sensing gaseous tension, minute-pressure power switch has 2 lines, wherein incoming line is received on the positive source, output line is received the supply voltage input of circuit board, there are State Control line and data line to link to each other between sensor and the microcontroller, link to each other by 2 bar state control lines and 1 data line between microcontroller and the LCD MODULE.
2, a kind of digital tire pressure gauge according to claim 1 is characterized in that: the IN pin of minute-pressure power switch M1 connects power supply BAT positive pole, the OUT pin connect simultaneously sensor IC 2, microcontroller IC1, LCD MODULE M2 the VDD pin; Sensor IC 2 has adopted pressure measuring module inner integrated and the high-performance digital sensor of temperature-measuring module, and sensor IC 2 is by the pressure and temperature of air chamber and extended pressure contact induction tire thereof; The PTA6 of microcontroller IC 1, PTA7 pin connect two mode of operation selection wire S0, S1 of sensor IC 2; The PTA3 pin connects the data clock line CLK of sensor IC 2; The PTA4 pin connects the Data In-Line DATA of sensor IC 2; The PTA5 pin connects the serial data output line OUT of sensor IC 2; The RST pin connects the output line RST that resets of sensor IC 2 by a current-limiting resistance R1; The sheet that the PTB3 pin of microcontroller IC1 connects LCD MODULE M2 selects control line CS, and the PTB4 pin connects the write line WR of LCD MODULE M2, and the PTB5 pin connects the data line DATA of LCD MODULE M2; Meet filter capacitor C1 between the power lead VDD of sensor IC 2 and the ground wire VSS, meet filter capacitor C2 between the power lead VDD of microcontroller IC1 and the ground wire VSS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012632 CN2736748Y (en) | 2004-10-22 | 2004-10-22 | Digital tire pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012632 CN2736748Y (en) | 2004-10-22 | 2004-10-22 | Digital tire pressure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2736748Y true CN2736748Y (en) | 2005-10-26 |
Family
ID=35307483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420012632 Expired - Fee Related CN2736748Y (en) | 2004-10-22 | 2004-10-22 | Digital tire pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2736748Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575452A (en) * | 2012-07-18 | 2014-02-12 | 上海华虹Nec电子有限公司 | Pressure detection system used for low pressure furnace tube device |
-
2004
- 2004-10-22 CN CN 200420012632 patent/CN2736748Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575452A (en) * | 2012-07-18 | 2014-02-12 | 上海华虹Nec电子有限公司 | Pressure detection system used for low pressure furnace tube device |
| CN103575452B (en) * | 2012-07-18 | 2015-08-19 | 上海华虹宏力半导体制造有限公司 | Be applied to the pressure detecting system of low pressure furnace tube apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |