CN208043313U - Pressure sensor and sphygmomanometer - Google Patents
Pressure sensor and sphygmomanometer Download PDFInfo
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- CN208043313U CN208043313U CN201820082944.1U CN201820082944U CN208043313U CN 208043313 U CN208043313 U CN 208043313U CN 201820082944 U CN201820082944 U CN 201820082944U CN 208043313 U CN208043313 U CN 208043313U
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- pressure
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Abstract
A kind of pressure sensor, including a substrate, two pressure sensitive chips and a temperature sense chip are packaged on the substrate, each pressure sensitive chip is for individually sensing extraneous gas air pressure, the circuit of the two pressure sensitives chip on the substrate is independent mutually, the circuit of the temperature sense chip and the two pressure sensitives chip is mutual indepedent, and for sensing the gas temperature angle value around the two pressure sensitives chip, when the air pressure of the external object gas described in the two pressure sensitive chip senses, the temperature sense chip can sense the temperature value of the external object gas, it is compensated with the atmospheric pressure value to the two pressure sensitives chip senses to the external object gas.The utility model further relates to a kind of sphygmomanometer.
Description
Technical field
The utility model is related to a kind of pressure sensor and a kind of sphygmomanometers.
Background technology
Pressure sensor is mainly used in medical health field in electronic sphygmomanometer, for sensing human blood-pressure.Pressure
Itself quality of sensor directly determines that the service life of sphygmomanometer, the precision of pressure sensor also directly determine blood pressure measurement
Resultant error size.Conditional electronic sphygmomanometer uses the pressure sensor of single pressure sensitive chip, and testing result is directly by this
The quality of pressure sensor determines, in long-time in use, the error of such pressure sensor generation is larger, and sphygmomanometer control
Device processed can not detect deviation caused by sensor itself drift, while when pressure sensor damages, sphygmomanometer was using
Pressure protection will not be carried out in journey, or even the air pressure that sphygmomanometer inflation can be made to generate hurts user.
Utility model content
The purpose of the utility model is to solve the above problems and to provide a kind of accuracy of detection height, the pressure sensors of safety durable
And sphygmomanometer.
A kind of pressure sensor, including a substrate are packaged with two pressure sensitive chips and a temperature sense on the substrate
Chip, air pressure of each pressure sensitive chip for individually sensing extraneous gas, the two pressure sensitives chip is in the substrate
On circuit it is independent mutually, the circuit of the temperature sense chip and the two pressure sensitives chip is mutual indepedent, and is used to feel
The gas temperature angle value around the two pressure sensitives chip is surveyed, the gas of the external object gas described in the two pressure sensitive chip senses
When pressure, the temperature sense chip can sense the temperature value of the external object gas, with to the two pressure sensitives chip sense
The atmospheric pressure value for measuring the external object gas compensates.
A kind of sphygmomanometer, the sphygmomanometer include controller, and the controller connects the two pressure sensitives chip and institute
Temperature sense chip is stated, the controller can read atmospheric pressure value and the reading of the object gas of the two pressure sensitives chip senses
The actual temperature value of object gas described in the temperature sense chip senses, the controller can be according to the two pressure sensitives cores
Piece sensing the object gas atmospheric pressure value whether preset error range judge the two pressure sensitives chip whether work
Make normally, the controller can be according to the actual temperature value of the object gas of the temperature sense chip senses relative to mark
Temperature gap at quasi- temperature, to the gas for the object gas that the two pressure sensitives chip senses under the actual temperature
Pressure value compensates.
The utility model has the positive effect that double pressure sensitive chips of monomer encapsulation can substantially reduce pressure sensing
The risk that device failure is brought, prevents sphygmomanometer in single pressure sensitive chip failure, and armband, which continues to shrink, causes user to injure
The problem of.Meanwhile double pressure sensitive chips of monomer encapsulation can effectively improve the accuracy of detection of blood pressure, prevent sensor itself from losing
Effect, is equipped with the compensation effect of temperature sense chip, expands the Applicable temperature range of sensor, make the use environment temperature of sphygmomanometer
Range increases, and ensures that pressure measurements are reliable and stable, so that the product using the sensor is really achieved and is safely and effectively expected
Target.
Description of the drawings
Fig. 1 is the schematic top plan view of sensor in the utility model embodiment.
Fig. 2 is to do section view at the schematic elevation view of sensor in Fig. 1, wherein substrate and pressure sensitive chip.
Fig. 3 is to do section view at the left view schematic diagram of sensor in Fig. 1, wherein substrate and pressure sensitive chip.
Fig. 4 is the bridge circuit schematic diagram of a chip in the utility model embodiment.
Fig. 5 is the schematic diagram that sensor carries pin in Fig. 1.
Fig. 6 is the high-level schematic functional block diagram of a sphygmomanometer in the utility model embodiment.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
It should be noted that when an element is considered as " connection " another element, it can be directly to separately
One element may be simultaneously present the element being centrally located.When an element is considered as " being set to " another element,
It can be set up directly on another element or may be simultaneously present the element being centrally located.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more relevant Listed Items.
One embodiment of the utility model is related to a kind of pressure sensor and sphygmomanometer.
It please refers to Fig.1 to Fig.3, in an embodiment, a pressure sensor 10 includes a substrate 11, first pressure induction
Chip 13, a second pressure induction chip 14 and a temperature sense chip 15.First pressure induction chip 13, second pressure induction
Chip 14 and temperature sense chip 15 are once encapsulated to substrate 11.Substrate 11 sets off bottom plate for one.Substrate 11 offers simultaneously
It is connected to the stomata 111 of first pressure induction chip 13 and second pressure induction chip 14.First pressure induction chip 13 and second
The circuit of pressure sensitive chip 14 on the substrate 11 is independent mutually and can individually sense external pressure, wherein a pressure sensitive chip
Pressure sensing capabilities will not be lost because of the failure of another pressure sensitive chip to the sensing of external object gas, ensure that pressure
The expection ability to work of sensor.Temperature sense chip 15 can sense the ambient temperature value around the two pressure sensitives chip,
Temperature sense chip 15 and the circuit of two pressure sensors are mutual indepedent, and will not be because of the circuit malfunction of any pressure sensitive chip
And lose expected ability to work.
In the present embodiment, first pressure induction chip 13 selects same wafer to cut with second pressure induction chip 14
It cuts, and the bridge resistance of first pressure induction chip 13 and second pressure induction chip 14 is within a preset range.In this way, can be
It keeps first pressure induction chip 13 to show with the one of second pressure induction chip 14 on physical features and realizes pressure-sensing effect
Consistency.
First pressure induction chip 13, second pressure induction chip 14 and temperature sense chip 15 can pass through micro-electromechanical technology
(MEMS) mode encapsulates to substrate 11 and forms surface-adhered type (SMT) sensor module, can also pass through MEMS package to substrate
11 are formed as dual inline type (DIP) sensor module.
First pressure induction chip 13 can be encapsulated as gauge pressure pattern or absolute pressure pattern with second pressure induction chip 14.Envelope
When dress is gauge pressure pattern, Fig. 2 and Fig. 3 are please referred to, external pressure enters pressure sensor seal chamber, atmospheric pressure by pressure catheter
Enter pressure sensor bottom naturally by stomata 111, carries out the measurement of target air pressure.When being encapsulated as absolute pressure pattern, external gas
Pressure enters pressure sensor seal chamber, sensor base sealing by pressure catheter, and atmospheric pressure cannot then enter.
Please continue to refer to Fig. 4 and Fig. 5, in the present embodiment, first pressure induction chip 13 includes a bridge circuit, should
Bridge circuit includes pin 1-5.Second pressure induction chip 14 has identical structure with first pressure induction chip 13, including draws
Foot 6-10.The pin row having the same after being encapsulated on the substrate 11 with second pressure induction chip 14 of first pressure induction chip 13
Column direction.
Please continue to refer to Fig. 6, in present embodiment, a sphygmomanometer 100 includes pressure sensor 10 and a controller 30.Control
Device 30 processed connects first pressure induction chip 13, second pressure induction chip 14 and temperature sense on pressure sensor 10 simultaneously
Chip 15.Controller 30 can control first pressure induction chip 13 simultaneously and second pressure induction chip 14 carries out blood pressure measurement,
Controller 30 can get the testing result of first pressure induction chip 13 and second pressure induction chip 14.Controller 30 can basis
Whether the atmospheric pressure value for the external object gas that first pressure induction chip 13 and second pressure induction chip 14 sense is preset
Whether error range is working properly to judge first pressure induction chip 13 and second pressure induction chip 14.
Under normal circumstances, it works when sphygmomanometer 100 is in normal temperature, such as 20 degree Celsius, pressure sensor passes through continuous
Supercharging measures to form pressure-voltage curve to export different voltage, at this point, pressure-voltage curve is standard value.Work as blood
Pressure meter 100 is different from normal temperature under the same conditions, works when such as 10 degree Celsius or 25 degree Celsius, the practical production of pressure sensor
Raw pressure-voltage curve can and normal temperature under pressure-voltage curve generate deviation, thus need according to temperature gap
It compensates.
Controller 30 can be in the same of the atmospheric pressure value that first pressure induction chip 13 and second pressure induction chip 14 sense
When obtain the actual temperature value of 15 sensing of temperature sense chip, obtain relative to the temperature gap under normal temperature, and then to two
The atmospheric pressure value of pressure sensitive chip senses compensates, and pressure-voltage curve is made to tend to standard value.In this way, expanding sensor
Applicable temperature range makes the use environment temperature range of sphygmomanometer increase, and ensures that pressure measurements are reliable and stable, makes to apply and be somebody's turn to do
The product of sensor is really achieved safely and effectively target.
It is independent of each other since first pressure induction chip 13 independently works with second pressure induction chip 14, when wherein
When one pressure sensitive chip failure, another pressure sensitive chip can work on, and controller 30 can be based on single pressure sensitive core
The result of piece is exported.The use of the double pressure sensitive chips singly encapsulated can greatly reduce the risk of blood pressure detecting, prevent
Only in single pressure sensitive chip failure, armband continues to shrink the problem of causing user to injure sphygmomanometer.Meanwhile singly encapsulating
Double pressure sensitive chips can effectively improve the accuracy of detection of blood pressure, be equipped with the compensation effect of temperature sense chip 15, measurement result
It is more reliable and more stable.On the other hand, sphygmomanometer can be according to the atmospheric pressure value of double pressure sensitive chips of acquisition to the reliable of sphygmomanometer
Property carry out self-test, for example, as two atmospheric pressure values difference be more than a preset value when, can quickly judge an at least pressure sensitive chip
Failure, controller allow blood pressure to be stopped, ensure the safety that the reliability of blood pressure measurement and user use accordingly.When repair,
It can also allow businessman's specific aim to replace pressure sensitive chip, reduce maintenance cost.
In another embodiment, pressure sensor can once encapsulate 3 or pressure above induction chip, or primary encapsulation
2 or temperatures above induction chip, to realize similar technique effect.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (2)
1. a kind of pressure sensor, including a substrate, it is characterised in that：Two pressure sensitive chips and one are packaged on the substrate
Temperature sense chip, air pressure of each pressure sensitive chip for individually sensing external object gas, the two pressure sensitives core
The circuit of piece on the substrate is independent mutually, and the circuit of the temperature sense chip and the two pressure sensitives chip is mutually only
It is vertical, and for sensing the gas temperature angle value around the two pressure sensitives chip, outside described in two pressure sensitive chip senses
When the air pressure of object gas, the temperature sense chip can sense the temperature value of the external object gas, with to two pressure
The atmospheric pressure value that power induction chip senses the external object gas compensates.
2. a kind of sphygmomanometer using pressure sensor as described in claim 1, it is characterised in that：The sphygmomanometer includes control
Device processed, the controller connect the two pressure sensitives chip and the temperature sense chip, and the controller can read described
Object gas described in the atmospheric pressure value and the reading temperature sense chip senses of the object gas of two pressure sensitive chip senses
Actual temperature value, the controller can according to the atmospheric pressure value of the object gas of the two pressure sensitives chip senses whether
Preset error range judges whether the two pressure sensitives chip is working properly, and the controller can be according to the temperature sense
The actual temperature value of the object gas of chip senses is relative to the temperature gap under normal temperature, to two pressure sensitive
The atmospheric pressure value for the object gas that chip senses under the actual temperature compensates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820082944.1U CN208043313U (en) | 2018-01-18 | 2018-01-18 | Pressure sensor and sphygmomanometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820082944.1U CN208043313U (en) | 2018-01-18 | 2018-01-18 | Pressure sensor and sphygmomanometer |
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| Publication Number | Publication Date |
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| CN208043313U true CN208043313U (en) | 2018-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820082944.1U Active CN208043313U (en) | 2018-01-18 | 2018-01-18 | Pressure sensor and sphygmomanometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966236A (en) * | 2018-01-18 | 2018-04-27 | 深圳市永盟电子科技限公司 | Pressure sensor, sphygmomanometer and pressure sensor manufacture method |
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2018
- 2018-01-18 CN CN201820082944.1U patent/CN208043313U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966236A (en) * | 2018-01-18 | 2018-04-27 | 深圳市永盟电子科技限公司 | Pressure sensor, sphygmomanometer and pressure sensor manufacture method |
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