Speed testing device based on thermistors
A technology of thermistor and speed measuring device, which is applied in the direction of measuring fluid velocity using thermal variables, can solve the problems of large measurement error, high cost, complicated circuit, etc., and achieve the effects of miniaturization, simple structure and low cost.
Active Publication Date: 2017-02-08
AUDIOWELL ELECTRONICS GUANGDONG
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Problems solved by technology
Both the wind cup wind speed sensor and the propeller wind speed sensor measure the wind speed through the rotation of the fan blades. The sensor has a large inertia, a large measurement error, and a large structural volume
Although the hot wire wind speed sensing device is small in size, the circuit is more complicated, the manufacturing process is more difficult, and the cost is higher.
Method used
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Embodiment Construction
[0027] Embodiments of the present invention are described in detail below:
[0028] Such as figure 1 As shown, the thermistor-based speed measuring device according to the embodiment of the present invention includes: a housing 10, a first thermistor 20, a second thermistor 30, a voltage detection module 40 and a control module.
[0029] The housing 10 is provided with a channel 11 , an inlet 12 and an outlet 13 . The channel 11 communicates with the external environment through the inlet 12 and the outlet 13 . The first thermistor 20 and the second thermistor 30 are connected in series in a constant voltage source circuit 50 (such as Figure 2-4 As shown), the first thermistor 20 and the second thermistor 30 are sequentially arranged in the channel 11 . The voltage detection module 40 is used to obtain a voltage between the first test point 51 between the first thermistor 20 and the second thermistor 30 and the second test point 52 in the constant voltage source circuit 50...
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The invention discloses a speed testing device based on thermistors. The speed testing device comprises a housing, a first thermistor, a second thermistor, a voltage detecting module and a control module. The housing is provided with a channel, an inlet and an outlet. The channel is communicated with an external environment through the inlet and the outlet. The first thermistor is serially connected with the second thermistor in a constant-voltage source circuit. The first thermistor and the second thermistor are successively arranged in the channel. The voltage detecting module is used for acquiring voltage information between a first testing point between the first thermistor and the second thermistor and a second testing point in the constant-voltage source circuit. The control module is connected with the voltage detecting module. The control module is used for obtaining flow speed information according to the voltage information and a preset rule. The speed testing device based on the thermistors can test the flow speed of fluid just through the first thermistor, the second thermistor, the voltage detecting module and the control module. The speed testing device has advantages of simple structure, low cost and high convenience in designing the device for realizing a small size.
Description
technical field [0001] The invention relates to a speed measuring device, in particular to a speed measuring device based on a thermistor. Background technique [0002] The traditional wind speed measurement sensing device mainly includes the following two types: one is the wind cup wind speed sensing device with rotating parts, the propeller wind speed sensing device, and the other is the hot wire wind speed sensing device. Both the wind cup wind speed sensor and the propeller wind speed sensor measure the wind speed through the rotation of the fan blades. The sensor has a large inertia, a large measurement error, and a large structural volume. Although the hot wire wind speed sensing device is small in size, the circuit is relatively complicated, the manufacturing process is relatively difficult, and the cost is relatively high. Contents of the invention [0003] Based on this, the present invention overcomes the defects of the prior art and provides a speed measuring d...
Claims
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IPC IPC(8): G01P5/12
CPCG01P5/12
Inventor 付浩田佳琦
Owner AUDIOWELL ELECTRONICS GUANGDONG