The present invention relates to an accelerometer, especially to a kind of accelerometer with temperature detection function.
Existing accelerometer has function of detecting the accelerating force, but the existing accelerometer can't detect the ambient temperature around the accelerometer.
Therefore, it is necessary to provide a kind of new technology solution to overcome above disadvantage.
Many aspects of the embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The present invention will hereinafter be described in detail with reference to an exemplary embodiment. To make the technical problems to be solved, technical solutions and beneficial effects of present disclosure more apparent, the present disclosure is described in further detail together with the figures and the embodiment. It should be understood the specific embodiment described hereby is only to explain this disclosure, not intended to limit this disclosure.
Referring to
The MEMS chip 20 includes a signal detection module 21 and a MEMS power module 22, and the signal detection module 21 is used for detecting acceleration signal, and the acceleration signal is differential analog signal. The signal detection module 21 transits the differential analog signal to the ASIC chip 30.
The circuit module on the ASIC chip 30 includes a signal processing module 31 connected to the signal detection module 21 on the MEMS chip 20, a voltage module 32 that provides drive voltage for the MEMS power module 22 on the MEMS chip 20, a temperature detection module 32 that is used for detecting ambient temperature and outputting the ambient temperature and a clock module 34 connected to the temperature detection module 33. The signal processing module 31 includes an analog-to-digital converter 311 that converts the analog signal to digital signal and an amplifier 312 that amplifies the digital signal, and the voltage module 32 provides the constant voltage that drives the MEMS power module, and the clock module 34 controls whether the temperature detection module 33 outputs temperature signal or not. The temperature detection module 33 is digital circuit module, by which the signal output is digital signal.
The external power 200 is connected to the signal processing module 31, the power module 32, the temperature detection module 33 and the clock module 34 on the ASIC chip 30 respectively, in order to drive each of above described circuit module.
Specifically, while acceleration signal is detected, the signal detection module 21 on the MEMS chip 20 transits the analog signal to the signal processing module 311, the analog-to-digital converter 311 on the signal processing module 311 converts the differential analog signal received into digital signal, and the amplifier 312 amplifies the above digital signal. The signal processing module 31 then outputs useful electric signal finally, i.e. acceleration signal that has been processed, meanwhile, the temperature detection module 33 detects temperature signal according to the current working environment, and transmits the signal to the clock module 34. The clock module 34 receives the external clock signal, and then the clock module 34 outputs the control signal to the temperature detection module 33. The temperature detection module 33 determines whether to output temperature signal or not based on the control signal, and the clock signal can be digital signal in various modes.
The temperature detection module is applied in the accelerometer, which makes the accelerometer detect its working ambient temperature in real time.
It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiment have been set forth in the foregoing description, together with details of the structures and functions of the embodiment, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.
Number | Date | Country | Kind |
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201620449656.6 | May 2016 | CN | national |