CN208588497U - Pressure sensor - Google Patents
Pressure sensor Download PDFInfo
- Publication number
- CN208588497U CN208588497U CN201821271577.6U CN201821271577U CN208588497U CN 208588497 U CN208588497 U CN 208588497U CN 201821271577 U CN201821271577 U CN 201821271577U CN 208588497 U CN208588497 U CN 208588497U
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- Prior art keywords
- pressure
- resistance
- output end
- regulation circuit
- voltage
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000005611 electricity Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
Pressure sensor, including pressure chip further include a linear regulation circuit that pressure chip output end is arranged in, and the Serial regulation of output voltage, i.e. V are realized by linear regulation circuitx=K*V+V0, wherein K and V0For constant, V is the raw output voltage of pressure chip output end, VxTo send out output voltage after linear regulation circuit adjustment.Due to adding the circuit of Serial regulation in pressure chip output end, to realize adjustment voltage and pressure linear relationship, without changing the internal constant of chip, relative to the cheap of producer's change parameter this programme, and can be adjusted according to the relationship of the voltage heel pressure of the ECU demand of client, dynamic role is stronger.
Description
Technical field
The utility model relates to a kind of sensor technical field more particularly to a kind of pressure sensors.
Background technique
Currently, due to the harsh conditions of pressure chip calibration, general chip can be provided the electricity of chip in pressure sensor
Press the V of the relationship of heel pressure as shown in figure 1 that can not individually demarcate after factory for unified factory state.Visitor only big to dosage
Family, chip producer just provide the calibrating parameters outside factory forehead, and it is expensive.Some big motorcycles and auto vendor in order to
Form monopolization, the parameter of the pressure chip deliberately designed on ECU and standard it is inconsistent, must be bought when causing to replace in the market
The set of EFI assembly of their our factories, very big cost is caused to user, forms certain technology fort and monopolization.
Summary of the invention
The purpose of this utility model is that aiming at the defects existing in the prior art, providing a kind of pressure sensor, voltage
It is adjustable with pressure dependence.
In order to achieve the above objectives, the utility model adopts the following technical solutions: pressure sensor, including pressure chip,
Further include a linear regulation circuit that pressure chip output end is set, the linear tune of output voltage is realized by linear regulation circuit
It is whole, i.e. Vx=K*V+V0, wherein K and V0For constant, V is the raw output voltage of pressure chip output end, VxFor Serial regulation electricity
Output voltage is sent out after the adjustment of road.
As an improvement: the linear regulation circuit include route nominal voltage source, first resistor, second resistance,
3rd resistor, the 4th resistance, the 4th resistance are connected between pressure chip output end and ground terminal, second electricity
Resistance is connected between pressure chip output end and linear regulation circuit output end, first resistor to be connected to linear regulation circuit defeated
Outlet and road sign claim between voltage source, and the 3rd resistor is connected between linear regulation circuit output end and ground terminal.
As an improvement: the relationship of the K and V0 as constant and resistance in linear regulation circuit are as follows: K=R1*R3/
(R1*R2+R1*R3+R2*R3), V0=V1*R2*R3/(R1*R2+R1*R3+R2*R3), wherein R1、R2、R3Respectively first resistor,
The resistance value of two resistance, 3rd resistor, V1For the voltage value of route nominal voltage source regulated power supply.
The technical solution of the utility model, due to adding the circuit of Serial regulation in pressure chip output end, to realize
Voltage and pressure linear relationship are adjusted, without changing the internal constant of chip, relative to producer's change parameter the utility model
It is cheap, and can be adjusted according to the relationship of the voltage heel pressure of the ECU demand of client, dynamic role is stronger.
It is practical to this below in conjunction with attached drawing in order to keep the purpose of this utility model, technical solution and advantage clearer
It is novel to be described in further detail.
Detailed description of the invention
Fig. 1 is the relation schematic diagram of the utility model pressure sensor Yu existing chip output voltage heel pressure.
Fig. 2 is a kind of structural schematic diagram of embodiment of the utility model linear regulation circuit.
Specific embodiment
A kind of embodiment of the utility model pressure sensor as shown in Figure 1, including pressure chip, setting are in pressure chip
The linear regulation circuit of output end V2 is realized the Serial regulation of output voltage, i.e. V by linear regulation circuitx=K*V+V0, wherein K
And V0For constant, V is the raw output voltage of pressure chip output end V2, VxTo send out output voltage after linear regulation circuit adjustment.
In order to realize V as shown in figure 1x, the linear regulation circuit of the present embodiment is as shown in Figure 2 comprising route nominal voltage source V1,
One resistance R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 4th resistance R4 are connected to pressure chip output
It holds between V2 and ground terminal, the second resistance R2 is connected to pressure chip output end V2 and linear regulation circuit output end Vx
Between, first resistor R1 be connected to linear regulation circuit output end Vx and road sign claims between voltage source V1, the described third electricity
Resistance R3 is connected between linear regulation circuit output end Vx and ground terminal.In the linear regulation circuit of Fig. 2:
I1=(V1-Vx)/R1,I2=(V2-Vx)/R2,I3=I1+I2=Vx/R3,
So obtaining: (V1-Vx)/R1+(V2-Vx)/R2=Vx/R3
=> (V1-Vx)*R2*R3+(V2-Vx)*R1*R3=Vx*R1*R2
=> V1*R2*R3-Vx*R2*R3+V2*R1*R3-Vx*R1*R3=Vx*R1*R2
=> V1*R2*R3+V2*R1*R3=Vx*(R1*R2+R1*R3+R2*R3)
=> Vx=(V1*R2*R3+V2*R1*R3)/(R1*R2+R1*R3+R2*R3)
=V2*R1*R3/(R1*R2+R1*R3+R2*R3)+V1*R2*R3/(R1*R2+R1*R3+R2*R3)
In circuit, wherein R1、R2、R3The respectively resistance value of first resistor R1, second resistance R2,3rd resistor R3, V1
For the voltage value of route nominal voltage source V1 regulated power supply.
K=R can then be enabled1*R3/(R1*R2+R1*R3+R2*R3)
V0=V1*R2*R3/(R1*R2+R1*R3+R2*R3)
It linearly can adjust to realize, i.e. the resistance value by adjusting first resistor R1, second resistance R2,3rd resistor R3
It can be realized, stronger to susceptibility of the voltage to pressure by the adjustment of linear rate, more greatly, pressure sensor is more sensitive.
In practical application, demand K and V are being provided0Under the premise of, can take some resistance is measuring resistance, then
The resistance value for finding out other 2 resistance can.
It is exemplified below, the EFI assembly of present a certain company, the relationship of voltage and pressure that ECU is required is with lower linear
Proportionate relationship:
Vx=0.02741*P+0.11159 (P unit is KPa)
And the nominal voltage of chip factory and the relationship of pressure are as follows:
V2=0.04475*P-0.49475 (P unit is KPa)
Then VxLinear relationship between V is as follows:
Vx=V2*0.02741/0.04475+0.11159+0.49475*0.02741/0.04475
=0.6125*V2+0.4146
Theoretical calculation formula according to fig. 2 obtains in the case that voltage V1 is 5 volts (route nominal voltage, invariable)
The sensitivity equation of route is as follows:
R1*R3/(R1*R2+R1*R3+R2*R3)=0.6125
5*R2*R3/(R1*R2+R1*R3+R2*R3)=0.4146
If R3 is the known resistance of standard, resistance value R3,
R1=K1*R3
R2=K2*R3
Then equation are as follows:
K1*R3*R3/(K1*R3*K2*R3+K1*R3*R3+K2*R3*R3)=0.6125
5*K2*R3*R3/(K1*R3*K2*R3+K1*R3*R3+K2*R3*R3)=0.4146
Final abbreviation is as follows:
K1/(K1*K2+K1+K2)=0.6125
K2/(K1*K2+K1+K2)=0.4146/5
It finally finds out: K1=K2*5*0.6125/0.4146
K1=5/0.4146-1-5*0.6125/0.4146=3.67317
K2=1/0.6125-0.4146/ (5*0.6125) -1=0.49727
Then 3 resistance are respectively as follows:
R1=3.67317*R3,R2=0.49727*R3
R4When being excessive in order to avoid electric current, the effect of chip is protected, a big resistance can be selected.
This is arrived, the above circuit design is completed, by circuit test, output voltage the repairing by this linear circuit of chip
After just, from VxOutput voltage reach the output requirement of client's sample.
Although the utility model is disclosed as above with specific embodiment, it is not intended to limit the utility model, appoints
What those skilled in the art, in the case where not departing from the spirit and scope of the utility model, still can make a little change with
Retouching, therefore the protection scope of the utility model should regard subject to the range institute defender of appended claims.
Claims (3)
1. a kind of pressure sensor, including pressure chip, it is characterised in that: further include a setting at pressure chip output end (V2)
Linear regulation circuit, by linear regulation circuit realize output voltage Serial regulation, i.e. Vx=K*V+V0, wherein K and V0It is normal
Number, V are the raw output voltage of pressure chip output end (V2), VxTo send out output voltage after linear regulation circuit adjustment.
2. pressure sensor according to claim 1, it is characterised in that: the linear regulation circuit includes that route is nominal
Voltage source (V1), first resistor (R1), second resistance (R2), 3rd resistor (R3), the 4th resistance (R4), the 4th resistance
(R4) it is connected between pressure chip output end (V2) and ground terminal, the second resistance (R2) is connected to pressure chip output
It holds between (V2) and linear regulation circuit output end (Vx), first resistor (R1) is connected to linear regulation circuit output end (Vx)
Claim between voltage source (V1) with road sign, the 3rd resistor (R3) is connected to linear regulation circuit output end (Vx) and ground terminal
Between.
3. pressure sensor according to claim 2, it is characterised in that: the K and V as constant0With Serial regulation electricity
The relationship of resistance in road are as follows: K=R1*R3/(R1*R2+R1*R3+R2*R3), V0=V1*R2*R3/(R1*R2+R1*R3+R2*R3), wherein
R1、R2、R3The respectively resistance value of first resistor (R1), second resistance (R2), 3rd resistor (R3), V1For route nominal voltage
The voltage value of source (V1) regulated power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821271577.6U CN208588497U (en) | 2018-08-08 | 2018-08-08 | Pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821271577.6U CN208588497U (en) | 2018-08-08 | 2018-08-08 | Pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208588497U true CN208588497U (en) | 2019-03-08 |
Family
ID=65543285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821271577.6U Withdrawn - After Issue CN208588497U (en) | 2018-08-08 | 2018-08-08 | Pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208588497U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956005A (en) * | 2018-08-08 | 2018-12-07 | 陈德连 | pressure sensor |
-
2018
- 2018-08-08 CN CN201821271577.6U patent/CN208588497U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956005A (en) * | 2018-08-08 | 2018-12-07 | 陈德连 | pressure sensor |
| CN108956005B (en) * | 2018-08-08 | 2024-03-22 | 陈德连 | Pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220324 Address after: 13 Pinghe Road, shiting, Shanqian street, Fuding City, Ningde City, Fujian Province Patentee after: FUDING Zhonglian Machinery Parts Co.,Ltd. Address before: 352000 No. 13, Pinghe Road, shiting, Shanqian street, Fuding City, Ningde City, Fujian Province Patentee before: Chen Delian |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190308 Effective date of abandoning: 20240322 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190308 Effective date of abandoning: 20240322 |