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Level detecting system realized by temperature sensor
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A technology of temperature sensor and liquid level detection, which is applied in the direction of liquid/fluid solid measurement, instruments, measuring devices, etc. It can solve the problems of low detection accuracy and achieve the effects of improved detection accuracy, easy management, and avoiding tank leakage accidents
Inactive Publication Date: 2017-08-25
哈尔滨工大兴科电子科技有限公司
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[0003] The present invention aims to solve the problem that the existing liquid level detection method is affected by external factors such as the detection environment, resulting in low detection accuracy. The present invention provides a liquid level detection system realized by using a temperature sensor
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specific Embodiment approach 1
[0024] Specific implementation mode one: see figure 1 Describe this embodiment, a liquid level detection system implemented by a temperature sensor described in this embodiment, which includes a protective tube 1, a temperature detection unit 2, a digital acquisition and transmission unit 3, and an industrial computer 4;
[0025] The bottom of the protective tube 1 is sealed, and the temperature detection unit 2 is fixed in the protective tube 1 for detecting ambient temperatures at different depths in the tank body 5 to be tested;
[0026] The digital acquisition and transmission unit 3 converts and amplifies the ambient temperature detected by the temperature detection unit 2 at different depths in the tank body 5 to be tested, and then transmits the signal to the industrial computer 4 through the signal line;
[0027] The industrial computer 4 obtains the temperature difference between the gas and the liquid and the temperature difference between the liquid and the sediment...
specific Embodiment approach 2
[0032] Specific implementation mode two: see Figure 1 to Figure 5 Describe this embodiment. The difference between this embodiment and the liquid level detection system implemented by using a temperature sensor described in the first embodiment is that the temperature detection unit 2 includes N temperature sensors 2-1 and a flexible fixed shell Body 2-2, N is an integer greater than or equal to 10;
[0033] The position information corresponding to each temperature sensor 2-1 is stored in the database of the industrial computer 4,
[0034] Along the length direction of the flexible fixed housing 2-2, N temperature sensors 2-1 are sequentially fixed on the inner wall of the flexible fixed housing 2-2 at equal intervals from low to high, forming a section temperature chain, and the N temperature sensors The data signal output end of 2-1 is connected with the data signal input end of the digital acquisition and transmission unit 3 through the bus,
[0035] The bottom of the f...
specific Embodiment approach 3
[0038] Specific implementation mode three: see Figure 1 to Figure 5 This embodiment is described. The difference between this embodiment and the liquid level detection system implemented by a temperature sensor described in the second embodiment is that the length of the section temperature chain is equal to the length of the flexible fixed shell 2-2 .
[0039] In this embodiment, the length of the section temperature chain is set to be equal to the length of the flexible fixed housing 2-2, which facilitates the positioning of the temperature sensor 2-1 and the setting of the scale scale.
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Abstract
The invention discloses a level detecting system realized by temperature sensor and belongs to the field of level measurement. The level detecting system realized by temperature sensor resolves the problem that the existing level detection method is affected by external factors such as the detection environment so that the detection accuracy is low. The level detecting system realized by temperature sensor comprises a protective tube, a temperature detecting unit, a digital acquisition and transmission unit and an industrial personal computer. The bottom of the protective tube is sealed. The temperature detecting unit is fixed in the protective tube and is used to detect environmental temperature at different depths of a tank to be tested. After the digital acquisition and transmission unit carries out signal transformation and amplification to the environmental temperature at different depths of the tank to be tested by the temperature detecting unit, the environmental temperature is transmitted to the industrial personal computer through signal lines. The industrial personal computer obtains the temperature difference between gas and liquid, and the temperature difference between liquid and sediment according to the received environmental temperature at different depths thereby determining the level in the tank to be tested. The length of the protective tube is larger than the depth of the tank to be tested. The level detecting system realized by temperature sensor is mainly used to detect the level.
Description
technical field [0001] The invention belongs to the field of liquid level measurement. Background technique [0002] At present, it is known that there are four types of common liquid level measurement methods, namely, the type of liquid level gauge measured by buoyancy, the type of liquid level gauge measured by pressure, the type of liquid level gauge measured by reflection, A type of level gauge that measures by conducting electricity. However, due to the different production methods, usage methods and verification methods of liquid tanklevel measurement and measurement sites, it is impossible to be competent for all measurement environments. The buoyancy method measures the liquid level and cannot be tracked remotely; the pressure method has the influence of sensor fouling and impurity adhesion, which makes the measurement accuracy low; the reflection method has the influence of steam and air bubbles, which causes deviation when the liquid surface is reflected; the con...
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