CN203414485U

CN203414485U - Wireless accelerometer

Info

Publication number: CN203414485U
Application number: CN201320551951.9U
Authority: CN
Inventors: 张波; 魏建中
Original assignee: Hangzhou Silan Microelectronics Co Ltd
Current assignee: Hangzhou Silan Microelectronics Co Ltd
Priority date: 2013-09-05
Filing date: 2013-09-05
Publication date: 2014-01-29
Anticipated expiration: 2023-09-05

Abstract

The utility model relates to a wireless accelerometer which comprises a microprocessor, an accelerometer and a wireless transceiver. A signal interface module and a power management module are integrated in the microprocessor. The accelerometer is a digital accelerometer. A signal interface module and a power management module are integrated in both the accelerometer and the wireless transceiver. The accelerometer and the wireless transceiver are both powered by the power management module in the microprocessor. The signal interface module in the microprocessor is respectively connected to the signal interface module in the accelerometer and the signal interface module in the wireless transceiver. According to the utility model, the power management module in the microprocessor is adopted to power the accelerometer and the wireless transceiver without the need of arranging a special power supply chip; and the digital accelerometer is adopted without the need of arranging a peripheral analog to digital converter. Thus, circuit design of the wireless accelerometer is simplified, size of a printed circuit board is minimized, and power consumption and costs are also reduced.

Description

Wireless Acceleration Sensor

Technical field

The utility model relates to acceleration transducer signals collection and transmission technique field, relates in particular to a kind of Wireless Acceleration Sensor.

Background technology

Acceleration transducer be a kind of can acceleration measurement and the acceleration of experiencing is converted to the electronic equipment of output signal, 3-axis acceleration sensor is a kind of in acceleration transducer, for gathering space vector.Nowadays, acceleration transducer is widely used in the fields such as automatic control, radio alarming and security monitoring of electronic product.Existing acceleration transducer is generally comprised of microprocessor, analog-digital converter, accelerometer, power management chip and some other peripheral components, the complexity size higher, that respectively form device of whole circuit design is larger, therefore, the circuit board of being printed by technique scheme is also generally larger, and cost is relatively high.

Summary of the invention

Technical problem to be solved in the utility model is to have complex circuit designs, bulky, the high power consumption of circuit and expensive the problems referred to above for existing acceleration transducer, and the high and low power consumption of a kind of integrated level and Wireless Acceleration Sensor are cheaply provided.

For addressing the above problem, the technical solution of the utility model is:

A kind of Wireless Acceleration Sensor, comprise microprocessor, acceleration transducer and wireless transceiver, in described microprocessor, be integrated with Signal interface module and power management module, described acceleration transducer is digital acceleromete, in acceleration transducer and wireless transceiver, be all integrated with Signal interface module and power pin module, acceleration transducer and wireless transceiver are by the power management module power supply in microprocessor, and the Signal interface module in microprocessor is connected with the Signal interface module in wireless transceiver with acceleration transducer respectively; Microprocessor reads the acquisition instructions that wireless transceiver receives, and control acceleration transducer and start to gather acceleration value, acceleration transducer is sent to the accekeration collecting in microprocessor, and microprocessor sends out by wireless transceiver degree of will speed up value.

Wireless Acceleration Sensor of the present utility model adopts the built-in power management module of microprocessor to acceleration transducer and wireless transceiver power supply, without special power supply chip is set, adopt digital acceleration transducer, make acceleration transducer output digit signals, without peripheral analog-digital converter is set, simplified the circuit design of Wireless Acceleration Sensor, improved circuit level, reduce the size of printed circuit board, also reduced power consumption and cost simultaneously.

Preferably, described wireless transceiver is operated in the ISM band of 2.4GHz.The ISM band of 2.4GHz exempts from for the whole world wireless communication frequency band of applying for, adopts the wireless transceiver of 2.4GHz, has further reduced cost of the present utility model, has reduced power consumption.

Preferably, the power management module in described microprocessor is low pressure difference linear voltage regulator, and low pressure difference linear voltage regulator is connected with the power pin module in wireless transceiver with acceleration transducer respectively.Low pressure difference linear voltage regulator is integrated in the inside of microprocessor, and low pressure difference linear voltage regulator can be for giving other device power supply, to improve integrated level of the present utility model.

Preferably, Signal interface module in described microprocessor comprises I2C bus interface module and Serial Peripheral Interface (SPI) module, Signal interface module in acceleration transducer is I2C bus interface module, Signal interface module in wireless transceiver is Serial Peripheral Interface (SPI) module, I2C bus interface module in microprocessor is connected with the I2C bus interface module in acceleration transducer, and the Serial Peripheral Interface (SPI) module in microprocessor is connected with the Serial Peripheral Interface (SPI) module in wireless transceiver.

Preferably, described acceleration transducer adopts three axle digital accelerometes.

Preferably, in described wireless transceiver, be also integrated with cyclic redundancy check (CRC) module.Cyclic redundancy check (CRC) module built-in, can simplify the Software for Design of microprocessor.

Accompanying drawing explanation

Fig. 1 is the schematic block circuit diagram of the utility model Wireless Acceleration Sensor.

Fig. 2 is the workflow diagram of the utility model Wireless Acceleration Sensor.

Embodiment

Below in conjunction with drawings and Examples, further describe the utility model, but protection domain of the present utility model is not limited to this.

With reference to Fig. 1, Wireless Acceleration Sensor of the present utility model comprises microprocessor 10, acceleration transducer 19 and wireless transceiver 15, microprocessor 10 is connected with wireless transceiver 15 with acceleration transducer 19 respectively, and microprocessor 10 is the device of little encapsulation, low-power consumption.In microprocessor 10, be integrated with Signal interface module and power management module, Signal interface module in microprocessor 10 comprises I2C bus interface module 12 and Serial Peripheral Interface (SPI) module 13, and the power management module in microprocessor 10 is low pressure difference linear voltage regulator 11.In acceleration transducer 19, be integrated with Signal interface module and power pin module 18, wherein, Signal interface module is I2C bus interface module 17.In wireless transceiver 15, be integrated with Signal interface module and power pin module 16, wherein, Signal interface module is Serial Peripheral Interface (SPI) module 14.Low pressure difference linear voltage regulator 11 is connected with power pin module 18 with power pin module 16 respectively, I2C bus interface module 12 in microprocessor 10 is connected with the I2C bus interface module 17 in acceleration transducer 19, and the Serial Peripheral Interface (SPI) module 13 in microprocessor 10 is connected with the Serial Peripheral Interface (SPI) module 14 in wireless transceiver 15.

Wherein, acceleration transducer 19 is digital acceleromete, and exporting collection signal is digital signal, and acceleration transducer is various dissimilar sensors, and the present embodiment be take and adopted three axle digital accelerometes to be elaborated as example.Wireless transceiver 15 is operated in ISM band, and ISM band, for global wireless communication frequency band of exempting from the 2.4GHz of application, is conducive to reduce costs.

The utility model has solved circuit complexity in traditional Acceleration Acquisition System, the problems such as power consumption is high, and cost is low, by above-mentioned device designs, can make cost of the present utility model to 1/2 of conventional art, the size of printed circuit board also can be reduced to 1/2 of conventional art.

With reference to Fig. 2, Wireless Acceleration Sensor of the present utility model, in data acquisition, specifically comprises the steps:

Step is a):

After the workflow of microprocessor brings into operation, by user program entrance, enter, first microprocessor 10, acceleration transducer 19 and wireless transceiver 15 are carried out to initialization.First, initialization microprocessor 10, itself carries out initialization to microprocessor 10, comprises that the frequency of operation that microprocessor 10 is set is 25MHz, and microprocessor 10 enable pins etc. are set; Then initialization acceleration transducer 19, and the range that acceleration transducer 19 is set is ± 2 acceleration of gravity, and enable the output of three axles; Then intiating radio transceiver 15, and the emissive power of wireless transceiver 15 is set, and enable cyclic redundancy check (CRC) and enter command reception pattern.

Step b):

Wireless transceiver 15 receives user instruction in real time, and whether microprocessor 10 real-time judge wireless transceivers 15 receive user instruction, read in real time user instruction, and whether the user instruction that judgement is read is acceleration value acquisition instructions.In this step, microprocessor 10 constantly reads the status register of wireless transceiver 15, when wireless transceiver 15 is received wireless data, its internal state register can be set to 1, if reading the status register of wireless transceiver 15 is 0, represent not receive user instruction, microprocessor 10 continues to read the status register of wireless transceiver 15, if it is 1 that microprocessor 10 is read the status register of wireless transceiver 15, represent to receive user instruction.The status register that microprocessor 10 is removed wireless transceiver 15 is 0, and read by I2C bus interface module 12 and I2C bus interface module 17 user instruction that wireless transceiver 15 is received, then 10 pairs of user instructions that read from wireless transceiver 15 of microprocessor are analyzed, if acceleration value acquisition instructions, enter steps d, otherwise, enter step c.

Step c):

Microprocessor 10 judges whether user instruction is standby command, and if so, microprocessor 10 enters holding state, otherwise, return to step b and continue to obtain; In this step, if any external break events, microprocessor 10 will enter wake-up step, then from user program entrance, brings into operation again.

Steps d):

Microprocessor 10 reads the acceleration value of acceleration transducer 19, and will speed up number of degrees value and send to user side by wireless transceiver 15.Microprocessor 10 reads respectively X, the Y of acceleration transducer 19, the accekeration of tri-coordinate axis of Z, and the accekeration of the X reading, Y, tri-coordinate axis of Z is write in the transmit buffer of wireless transceiver 15 by Serial Peripheral Interface (SPI) module 13 and Serial Peripheral Interface (SPI) module 14, and starting transmission order, wireless transceiver 15 sends data.

Step e):

After above-mentioned steps completes, return to step b and continue to obtain.

In above-mentioned explanation, all special instructions that do not add, all adopt technological means of the prior art.

Claims

1. a Wireless Acceleration Sensor, comprise microprocessor, acceleration transducer and wireless transceiver, it is characterized in that, in described microprocessor, be integrated with Signal interface module and power management module, described acceleration transducer is digital acceleromete, in acceleration transducer and wireless transceiver, be all integrated with Signal interface module and power pin module, acceleration transducer and wireless transceiver are by the power management module power supply in microprocessor, Signal interface module in microprocessor is connected with the Signal interface module in wireless transceiver with acceleration transducer respectively,

Microprocessor reads the acquisition instructions that wireless transceiver receives, and control acceleration transducer and start to gather acceleration value, acceleration transducer is sent to the accekeration collecting in microprocessor, and microprocessor sends out by wireless transceiver degree of will speed up value.

2. Wireless Acceleration Sensor according to claim 1, is characterized in that, described wireless transceiver is operated in the ISM band of 2.4GHz.

3. Wireless Acceleration Sensor according to claim 1, it is characterized in that, power management module in described microprocessor is low pressure difference linear voltage regulator, and low pressure difference linear voltage regulator is connected with the power pin module in wireless transceiver with acceleration transducer respectively.

4. Wireless Acceleration Sensor according to claim 1, it is characterized in that, Signal interface module in described microprocessor comprises I2C bus interface module and Serial Peripheral Interface (SPI) module, Signal interface module in acceleration transducer is I2C bus interface module, Signal interface module in wireless transceiver is Serial Peripheral Interface (SPI) module, I2C bus interface module in microprocessor is connected with the I2C bus interface module in acceleration transducer, and the Serial Peripheral Interface (SPI) module in microprocessor is connected with the Serial Peripheral Interface (SPI) module in wireless transceiver.

5. Wireless Acceleration Sensor according to claim 1, is characterized in that, described acceleration transducer adopts three axle digital accelerometes.

6. Wireless Acceleration Sensor according to claim 1, is characterized in that, is also integrated with cyclic redundancy check (CRC) module in described wireless transceiver.