CN104175817A - Self-activation tire pressure sensor - Google Patents
Self-activation tire pressure sensor Download PDFInfo
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- CN104175817A CN104175817A CN201410433987.6A CN201410433987A CN104175817A CN 104175817 A CN104175817 A CN 104175817A CN 201410433987 A CN201410433987 A CN 201410433987A CN 104175817 A CN104175817 A CN 104175817A
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- pressure sensor
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- sensing chip
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Abstract
The invention discloses a self-activation tire pressure sensor comprising a sensing chip U1, a current-limiting resistor R1 and a reed switch S1, wherein the sensing chip U1 is of GE1769 type and an enabling pin P14 of the sensing chip is connected with a power supply; and meanwhile, the enabling pin P14 is grounded after being connected with the current-limiting resistor R1 and the reed switch S1 in series. A contact normally open reed switch is used as the reed switch. The value of resistance of the current-limiting resistor R1 is 47K. By utilizing the self-activation tire pressure sensor provided by the invention, the battery use efficiency is effectively improved, and the service life of the sensor is prolonged.
Description
Technical field
The present invention relates to a kind of tire pressure sensor, relate to specifically a kind of self-activation tire pressure sensor and self-activation method thereof, belong to TMPS technical field.
Background technology
Monitoring tire pressure claims again TPMS, that air pressure and temperature to motor tire carried out Real-Time Monitoring, display of tyre pressure and temperature numerical value, allow car owner grasp at any time tire pressure temperature conditions, find that in time tire flat, air pressure deficiency, air pressure crosses high situation, avoid blowing out and the traffic accident that causes.Current TPMS sensor is all, in vehicle stationary or driving process, tire pressure and temperature are carried out to real-time automatic monitoring, and tire high pressure, low pressure, high temperature are carried out and alarm, avoids the traffic accident because of tire fault initiation, to guarantee traffic safety.After current tyre pressure sensor dispatches from the factory, just always in working and sending data mode, consume very large electric weight, the effective storage life of battery is reduced greatly, shortened the service life of tyre pressure sensor.And part can be accomplished the self-activating tyre pressure sensor of entrucking, sensor is in off position when dispatching from the factory, cannot detect its validity, and sensor may cause damaging in the process of lengthy warehousing, if the sensor entrucking damaging, dismounting trouble, increases human cost, meanwhile, bring potential safety hazard to customer.
Summary of the invention
Goal of the invention: the object of the invention is for the deficiencies in the prior art, provides a kind of and improves battery availability factor, extends the sensor self-activation tire pressure sensor in service life.
Technical scheme: a kind of self-activation pressure sensor of the present invention, comprise sensing chip U1, current-limiting resistance R1 and dry-reed tube S1, described sensing chip U1 is GE1769, its enable pin P14 is connected with power supply, meanwhile, described enable pin P14 connect with described current-limiting resistance R1 and described dry-reed tube S1 after ground connection.
Being further defined to of technical solution of the present invention, described dry-reed tube is contact open type dry-reed tube, open type dry-reed tube junction closure in the time applying external magnetic field, and when usual, keep opening from state, can control the access level of sensing chip by this principle.
Further, the resistance of described current-limiting resistance R1 is 47K, and current-limiting resistance contributes to the current stabilization of reed switch circuit; protection sensing chip, according to the work magnetic of dry-reed tube, current-limiting resistance is preferably between 40 ~ 50K; through checking repeatedly, in the time that current-limiting resistance is 47K, reach optimum mode of operation.
Further, the described enable pin P14 current-limiting resistance R2 that connects with power supply junction, plays current limliting step-down to access power supply, protection master chip.
Further, the resistance of described current-limiting resistance R2 is 4.7K.
Further, the pin IN1 of described sensing chip U1, pin IN2, pin IN3 and the equal ground connection of pin IN4.
Beneficial effect: a kind of self-activation tire pressure sensor provided by the invention, adopt in the Enable Pin of sensing chip and connect dry-reed tube, by the overlapping magnetizable reed in two end points places of dry-reed tube, realize while detection as sensing chip provides low level, thereby trigger sensing chip and send data, realize the validity of tyre pressure sensor is detected, thereby, avoid the tyre pressure sensor damaging by the risk of entrucking, avoid because the work capacity that dismounting brings, reduce job costs, ensured customer's safety; Circuit of the present invention is realized simple, and dry-reed tube low price is easy to get, and easily realizes, and meanwhile, only need to provide magnetic field to the conducting of dry-reed tube, easy to operate, detects simply, easily grasps.
Brief description of the drawings
Fig. 1 is the circuit diagram of a kind of self-activation tire pressure sensor provided by the invention.
Detailed description of the invention
Below by accompanying drawing, technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.
embodiment 1:the present embodiment provides a kind of self-activation pressure sensor, this pressure sensor adopts sensing chip U1, described sensing chip U1 is GE1769, by the self-characteristic of sensing chip GE1769, realize sensor and do not work at normal pressure state (stock), when monitoring pressure state (installation), carry out pressure monitoring, reduce the electric quantity consumption of sensor, improve the battery degree of utilization of sensor, extend the service life of sensor.
The present embodiment also comprises testing circuit, and described testing circuit comprises current-limiting resistance R1 and dry-reed tube S1, ground connection after the enable pin P14 of sensing chip GE1769 connects with described current-limiting resistance R1 and described dry-reed tube S1.Described dry-reed tube is contact open type dry-reed tube, open type dry-reed tube junction closure in the time applying external magnetic field, and when usual, keep opening from state, can control the access level of sensing chip by this principle.By the overlapping magnetizable reed in two end points places of dry-reed tube, while realizing detection, for sensing chip provides low level, send data thereby trigger sensing chip, realize the validity of tyre pressure sensor is detected.
Meanwhile, the resistance of described current-limiting resistance R1 is 47K, and current-limiting resistance contributes to the current stabilization of reed switch circuit; protection sensing chip, according to the work magnetic of dry-reed tube, current-limiting resistance is preferably between 40 ~ 50K; through checking repeatedly, in the time that current-limiting resistance is 47K, reach optimum mode of operation.
The enable pin P14 of the sensing chip GE1769 of the present embodiment is connected with power supply, and meanwhile, the described enable pin P14 resistance of connecting with power supply junction is the current-limiting resistance R2 of 4.7K, and access power supply is played to current limliting step-down, protection master chip.And, pin IN1, pin IN2, pin IN3 and the equal ground connection of pin IN4 of described sensing chip U1.
The self-activation tire pressure sensor of the present embodiment, in the time detecting, by common magnet near about dry-reed tube 2cm, dry-reed tube S1 conducting, in the time that the P14 of sensing chip U1 pin (connecing dry-reed tube pin) is low level, send the data that detect, receptor receives that correct data represents that sensor is qualified, otherwise, nonconformity.By aforesaid operations, the present embodiment is realized the validity of tyre pressure sensor is detected, thereby, avoid the tyre pressure sensor damaging by the risk of entrucking, avoid, because the work capacity that dismounting brings has reduced job costs, having ensured customer's safety.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Not departing under the spirit and scope of the present invention prerequisite of claims definition, can make in the form and details various variations to it.
Claims (6)
1. a self-activation pressure sensor, it is characterized in that, comprise sensing chip U1, current-limiting resistance R1 and dry-reed tube S1, described sensing chip U1 is GE1769, its enable pin P14 is connected with power supply, meanwhile, described enable pin P14 connect with described current-limiting resistance R1 and described dry-reed tube S1 after ground connection.
2. a kind of self-activation pressure sensor according to claim 1, is characterized in that, described dry-reed tube is contact open type dry-reed tube.
3. a kind of self-activation pressure sensor according to claim 1, is characterized in that, the resistance of described current-limiting resistance R1 is 47K.
4. according to a kind of self-activation pressure sensor described in the arbitrary claim of claim 1 ~ 3, it is characterized in that the described enable pin P14 current-limiting resistance R2 that connects with power supply junction.
5. a kind of self-activation pressure sensor according to claim 4, is characterized in that, the resistance of described current-limiting resistance R2 is 4.7K.
6. according to a kind of self-activation pressure sensor described in the arbitrary claim of claim 1 ~ 3, it is characterized in that pin IN1, pin IN2, pin IN3 and the equal ground connection of pin IN4 of described sensing chip U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410433987.6A CN104175817A (en) | 2014-08-29 | 2014-08-29 | Self-activation tire pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410433987.6A CN104175817A (en) | 2014-08-29 | 2014-08-29 | Self-activation tire pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104175817A true CN104175817A (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410433987.6A Pending CN104175817A (en) | 2014-08-29 | 2014-08-29 | Self-activation tire pressure sensor |
Country Status (1)
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| CN (1) | CN104175817A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104537912A (en) * | 2014-12-26 | 2015-04-22 | 张鹏 | Wheel landmine pressing simulation warning device |
| CN105987785A (en) * | 2015-03-24 | 2016-10-05 | 中山市六源通电子科技有限公司 | Activation method of tire pressure sensor |
-
2014
- 2014-08-29 CN CN201410433987.6A patent/CN104175817A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104537912A (en) * | 2014-12-26 | 2015-04-22 | 张鹏 | Wheel landmine pressing simulation warning device |
| CN105987785A (en) * | 2015-03-24 | 2016-10-05 | 中山市六源通电子科技有限公司 | Activation method of tire pressure sensor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141203 |
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| RJ01 | Rejection of invention patent application after publication |