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| 型号： | MPX5006 |
| 厂商： | Motorola, Inc. |
| 英文描述： | Pressure Sensor(压力传感器) |
| 中文描述： | 压力传感器（压力传感器） |
| 文件页数： | 2/4页 |
| 文件大小： | 65K |
| 代理商： | MPX5006 |
2
Motorola Sensor Device Data
There are a lot of applications that will lend themselves
naturally to auto–zeroing. Typical applications are those that:
experience a zero–pressure condition at system start up,
are idle for a long time (zero pressure), take a pressure
measurement then go back to idle again.
For example, in a water level measurement in a washing
machine application, there is a zero pressure reference
condition when the water in the tub is fully pumped out.
Another application that is perfect for auto–zeroing is a
beverage fill level measurement; a zero reference condition
exists before the bottle is filled. HVAC air flow applications can
also use auto–zeroing; before system start up, an auto–zero
can be initiated. In other words, it can be used in applications
where a zero pressure condition can exist in order to
auto–zero the system.
An auto–zero command can be automated by the system
or can be commanded manually. Each system will have a
different algorithm to command an auto–zero signal. For
example, using the beverage fill level measurement as an
example, the system will auto zero the sensor before the bottle
is filled.
IMPLEMENTATION OF AUTO–ZERO WITH A
MICROCONTROLLER
Auto–zero can be implemented easily when the integrated
sensor is interfaced to a microcontroller. The auto–zero
algorithm is listed below:
1. Sample the sensor output when a known zero refer-
ence is applied to the sensor (atmospheric pressure is
a zero reference for gauge type measurement). Store
current zero pressure offset as CZPO.
2. Sample the sensor output at the current applied
pressure. Call this SP.
3. Subtract the stored offset correction, CZPO, from SP.
The pressure being measured is simply calculated as:
PMEAS = (SP
CZPO)/S.
Note that the equation is simply a straight line equation,
where S is the sensitivity of the sensor. The auto–zero
algorithm is shown graphically in Figure 3.
Figure 3. Flow–Chart of the Auto–Zero Algorithm
Start
Sample Current Zero Offset, CZPO
Sample Current Pressure, SP
P
MEAS
CP
CZPO
S
Calculate Pressure
measure again
auto–zero command received
End
相关PDF资料 |
PDF描述 |
|---|---|
| MPX5050GVSX | OPERATING OVERVIEW INTEGRATED PRESSURE SENSOR 0 to 50 kPa (0 to 7.25 psi) 0.2 to 4.7 Volts Output |
| MPX5050GP1 | Sensor |
| MPX5050GVP | OPERATING OVERVIEW INTEGRATED PRESSURE SENSOR 0 to 50 kPa (0 to 7.25 psi) 0.2 to 4.7 Volts Output |
| MPX5050GVS | OPERATING OVERVIEW INTEGRATED PRESSURE SENSOR 0 to 50 kPa (0 to 7.25 psi) 0.2 to 4.7 Volts Output |
| MPX5050GSX | OPERATING OVERVIEW INTEGRATED PRESSURE SENSOR 0 to 50 kPa (0 to 7.25 psi) 0.2 to 4.7 Volts Output |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MPX5010 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Silicon Pressure Sensor On-Chip Signal Conditioned, Temperature Compensated and Calibrated |
| MPX5010_09 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Silicon Pressure Sensor On-Chip Signal Conditioned, Temperature Compensated and Calibrated |
| MPX5010D | 功能描述:板上安装压力/力传感器 PRES SEN INTEG 10KPA RoHS:否 制造商:Honeywell 工作压力:0 bar to 4 bar 压力类型:Gage 准确性:+ / - 0.25 % 输出类型:Digital 安装风格:Through Hole 工作电源电压:5 V 封装 / 箱体:SIP 端口类型:Dual Radial Barbed, Same sides |
| MPX5010D | 制造商:Freescale Semiconductor 功能描述:Pressure Sensors IC |
| MPX5010DP | 功能描述:板上安装压力/力传感器 PRES SEN INTEG 10KPA RoHS:否 制造商:Honeywell 工作压力:0 bar to 4 bar 压力类型:Gage 准确性:+ / - 0.25 % 输出类型:Digital 安装风格:Through Hole 工作电源电压:5 V 封装 / 箱体:SIP 端口类型:Dual Radial Barbed, Same sides |
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