CN204055176U - A kind of self-activation tire pressure sensor - Google Patents
A kind of self-activation tire pressure sensor Download PDFInfo
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- CN204055176U CN204055176U CN201420493286.7U CN201420493286U CN204055176U CN 204055176 U CN204055176 U CN 204055176U CN 201420493286 U CN201420493286 U CN 201420493286U CN 204055176 U CN204055176 U CN 204055176U
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- pressure sensor
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- reed tube
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Abstract
The utility model discloses a kind of self-activation pressure sensor, 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.Described dry-reed tube is contact open type dry-reed tube.The resistance of described current-limiting resistance R1 is 47K.The self-activation pressure sensor that the utility model provides effectively improves battery availability factor, and extends sensor service life.
Description
Technical field
The utility model relates to a kind of tire pressure sensor, relates to a kind of self-activation tire pressure sensor and self-activation method thereof specifically, belongs to TMPS technical field.
Background technology
Monitoring tire pressure is also known as TPMS, that Real-Time Monitoring is carried out to the air pressure of motor tire and temperature, display of tyre pressure and temperature numerical value, car owner is allowed to grasp tire pressure temperature conditions at any time, Timeliness coverage tire flat, air pressure are not enough, air pressure crosses high situation, avoid blowing out and the traffic accident that causes.Current TPMS sensor is all carry out real-time automatic monitoring to tire pressure and temperature in vehicle stationary or driving process, and carries out and alarm tire high pressure, low pressure, high temperature, avoids the traffic accident because tire fault causes, to guarantee traffic safety.Just be in work after current tyre pressure sensor dispatches from the factory always and send data mode, consuming very large electricity, the effective storage life of battery is reduced greatly, shortens the service life of tyre pressure sensor.And part can accomplish the self-activating tyre pressure sensor of entrucking, during owing to dispatching from the factory, sensor is in off position, its validity cannot be detected, and sensor may cause damaging in the process of lengthy warehousing, if the sensor entrucking damaged, dismounting trouble, increases human cost, meanwhile, potential safety hazard is brought to customer.
Utility model content
Utility model object: the utility model object is for the deficiencies in the prior art, provides a kind of self-activation tire pressure sensor improving battery availability factor, extend sensor service life.
Technical scheme: a kind of self-activation pressure sensor described in the utility model, 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 solutions of the utility model, described dry-reed tube is contact open type dry-reed tube, and open type dry-reed tube is junction closure when applying external magnetic field, and when usual, keep opening from state, the access level of sensing chip can be controlled 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, when current-limiting resistance is 47K, reach optimum mode of operation.
Further, described enable pin P14 connects with power supply junction a current-limiting resistance R2, 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, pin IN1, the pin IN2 of described sensing chip U1, pin IN3 and the equal ground connection of pin IN4.
Beneficial effect: a kind of self-activation tire pressure sensor that the utility model provides, adopt and connect dry-reed tube in the Enable Pin of sensing chip, by the magnetizable reed of the two panels end points place overlap of dry-reed tube, for sensing chip provides low level when realizing detecting, thus triggers sense chip sends data, realize detecting the validity of tyre pressure sensor, thus, avoid the risk of tyre pressure sensor by entrucking of damage, avoid because dismantle the work capacity brought, reduce job costs, ensure that the safety of customer; The utility model circuit realiration is simple, and dry-reed tube low price is easy to get, and easily realizes, and meanwhile, only needs to provide magnetic field to the conducting of dry-reed tube, easy to operate, detects simple, easily grasps.
Accompanying drawing explanation
The circuit diagram of a kind of self-activation tire pressure sensor that Fig. 1 provides for the utility model.
Detailed description of the invention
Below by accompanying drawing, technical solutions of the utility model are described in detail, but protection domain of the present utility model 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 not work at normal-pressure situations (stock), carry out pressure monitoring when monitoring pressure state (installation), 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, and open type dry-reed tube is junction closure when applying external magnetic field, and when usual, keeps opening from state, can be controlled the access level of sensing chip by this principle.By the magnetizable reed of the two panels end points place overlap of dry-reed tube, for sensing chip provides low level when realizing detecting, thus triggers sense chip sends data, realizes detecting the validity of tyre pressure sensor.
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, when 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, a described enable pin P14 resistance of connecting with power supply junction is the current-limiting resistance R2 of 4.7K, plays current limliting step-down, protection master chip to access power supply.And, pin IN1, the pin IN2 of described sensing chip U1, pin IN3 and the equal ground connection of pin IN4.
The self-activation tire pressure sensor of the present embodiment, when detecting, by common magnet near dry-reed tube about 2cm, dry-reed tube S1 conducting, when the P14 pin (namely connecing dry-reed tube pin) of sensing chip U1 is for low level, send the data detected, receptor receives correct data and then represents that sensor is qualified, otherwise, nonconformity.By aforesaid operations, the present embodiment realizes detecting the validity of tyre pressure sensor, thus, avoid the risk of tyre pressure sensor by entrucking of damage, avoid because dismantle the work capacity brought, reduce job costs, ensure that the safety of customer.
As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model not departing from claims definition, various change can be made in the form and details 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. a kind of self-activation pressure sensor according to the arbitrary claim of claim 1 ~ 3, is characterized in that, described enable pin P14 connects with power supply junction a current-limiting resistance R2.
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. a kind of self-activation pressure sensor according to the arbitrary claim of claim 1 ~ 3, is characterized in that, pin IN1, the pin IN2 of described sensing chip U1, pin IN3 and the equal ground connection of pin IN4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420493286.7U CN204055176U (en) | 2014-08-29 | 2014-08-29 | A kind of self-activation tire pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420493286.7U CN204055176U (en) | 2014-08-29 | 2014-08-29 | A kind of self-activation tire pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204055176U true CN204055176U (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420493286.7U Active CN204055176U (en) | 2014-08-29 | 2014-08-29 | A kind of self-activation tire pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204055176U (en) |
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2014
- 2014-08-29 CN CN201420493286.7U patent/CN204055176U/en active Active
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| GR01 | Patent grant |