New energy dynamometer rack water spraying tower water spraying temperature control system and control method

Abstract

The invention discloses a new energy dynamometer rack water spraying tower water spraying temperature control system and control method. The system comprises a spraying pump, a stirring mechanism, a visual monitoring system, an electric heating device, a temperature sensor and a single-chip microcomputer controller. The single-chip microcomputer controller is in communication connection with the stirring mechanism, the visual monitoring system, the electric heating device and the temperature sensor. The temperature sensor sends the temperature of cooling water to the single-chip microcomputer controller in real time, the single-chip microcomputer controller controls the stirring mechanism to work or stop working according to a set threshold value, and the cooling water is prevented from being frozen. The visual monitoring system identifies whether the water surface is frozen or not according to the real-time image of the pool and transmits an identification result to the single-chip microcomputer controller; when the single-chip microcomputer controller determines that the water surface is frozen, the current freezing point is recognized through the temperature sensor, and meanwhile the electric heating device is controlled to be started to heat the cooling water.

Description

Technical Field

[0001] The present invention belongs to the technical field of water spray towers for new energy dynamometer benches, and specifically relates to a water spray temperature control system and a control method for a water spray tower for a new energy dynamometer bench, which is particularly suitable for the winter operation state of an engine test laboratory in a low-temperature area. Background Art

[0002] Since the water tower is located on the roof of an outdoor building, and the winter environment in Northeast China is harsh, with the lowest temperature reaching -30°C. The cooling water in the water tower pool freezes in winter, causing the spray pump to dry and burn out, and the public power equipment system to shut down, affecting the normal operation of the powertrain test laboratory and the progress of engine testing. It is now necessary to add an intelligent temperature detection device and control method. As part of the public power system, the water tower is an essential equipment for the operation of the laboratory. It needs to be kept in operation 24 hours a day and is used for a variety of key equipment such as fuel consumption meters, water thermostats, and oil thermostats. The temperature in Northeast China is below 0°C for as long as 4-5 months in winter. Under high-efficiency and harsh operating conditions, the cooling water in the water tower pool frequently freezes in winter, which not only affects the operating efficiency of the laboratory, but also greatly increases the labor and equipment maintenance costs. Summary of the invention

[0003] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a water spray temperature control system and control method for a new energy dynamometer bench water spray tower, which can effectively prevent emergency situations such as dry-running and burning of a spray pump, shutdown of a public power equipment system, and shutdown of all powertrain and engine test laboratories. By adding functions such as water pool stirring, visual monitoring, water temperature detection, electric heating, and flow monitoring, it is ensured that when the temperature is below 0°C in winter, the water pool of the water spray tower will not freeze, thereby ensuring the normal operation of public power equipment 24 hours a day, which can greatly reduce labor costs, reduce equipment maintenance costs, and effectively improve the laboratory operation rate.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] As a first aspect of the present invention, a water spray temperature control system for a water tower of a new energy dynamometer bench is provided, comprising a spray pump, a stirring mechanism, a visual monitoring system, an electric heating device, a temperature sensor and a single-chip microcomputer controller; the spray pump is arranged in a water pool of the water tower; the stirring mechanism is arranged at the bottom of the water pool of the water tower; the visual monitoring system is arranged on the wall of the water tower for monitoring the fluctuation of the water surface in the water pool; the electric heating device is arranged in the water pool; the temperature sensor is arranged in the water pool for monitoring the cooling water temperature; the single-chip microcomputer controller is respectively connected to the stirring mechanism, the visual monitoring system, the electric heating device and the temperature sensor for communication; the temperature sensor sends the cooling water temperature to the single-chip microcomputer controller in real time, and the single-chip microcomputer controller controls the stirring mechanism to work or stop working according to the set threshold value to prevent the cooling water from freezing; the visual monitoring system identifies whether the water surface is frozen according to the real-time image of the water pool, and transmits the identification result to the single-chip microcomputer controller; when the single-chip microcomputer controller determines that the water surface is frozen, the current freezing point is identified by the temperature sensor, and the electric heating device is controlled to start at the same time to heat the cooling water.

[0006] Furthermore, the stirring mechanism includes a motor, an eccentric rotating shaft and a rocker rotating arm; the motor is started or stopped by the microcontroller controller command; the motor output end is connected to the eccentric rotating shaft, and multiple rocker rotating arms are connected to the eccentric rotating shaft, and the rocker rotating arms realize irregular motion under the drive of the motor.

[0007] Furthermore, in the stirring mechanism, a spring is provided between the rocker rotating arm and the eccentric rotating shaft.

[0008] Furthermore, a plurality of temperature sensors are provided and distributed at different positions in the cooling water pool.

[0009] Furthermore, the visual monitoring system includes a linear array camera and an image processing module. The linear array camera performs real-time synchronous scanning. The image processing module compares and analyzes the images captured by the camera to identify the water surface fluctuations at the top of the pool. Through comparison, if the image shows that the water surface is stable, it is regarded as abnormal, and the information is sent synchronously to the single-chip controller.

[0010] Furthermore, the electric heating device includes a solid-state relay and an electric heating belt, the electric heating belt is disposed in a water pool of the shower tower, and the solid-state relay is connected to the single-chip microcomputer controller.

[0011] Furthermore, it also includes a flow sensor installed at the rear end of the spray pump. The flow sensor sends the water flow of the spray pump to the single-chip microcomputer controller. The single-chip microcomputer combines the water flow and the recognition result of the visual monitoring system to determine whether the water surface is frozen.

[0012] Furthermore, antifreeze is added into the water pool of the shower tower.

[0013] As a second aspect of the present invention, a control method for a water spraying temperature control system of a new energy dynamometer stand water spraying tower is also provided, comprising the following steps:

[0014] S1. Control the stirring mechanism to start or stop working according to the cooling water temperature:

[0015] S11. The cooling water temperature in the pool is monitored by a temperature sensor and sent to the microcontroller controller. If the water temperature is lower than the start threshold, the process proceeds to step S12; otherwise, the process proceeds to step S13;

[0016] S12. The single-chip microcomputer controller sends a control instruction to the stirring mechanism to start the stirring mechanism to perform irregular motion to prevent ice formation; after the stirring mechanism is started for a certain period of time, step S13 is entered;

[0017] S13. If the water temperature is higher than the stop threshold, the stirring mechanism is controlled to stop working and proceed to step S2;

[0018] S2. Control the electric heating device to start or stop working according to the ice conditions on the water surface:

[0019] S21. Monitor the fluctuation of the water surface of the pool through the visual monitoring system. If there is no fluctuation on the water surface, it is considered abnormal, and the abnormal water surface information is sent to the single-chip controller;

[0020] S22. After the single-chip microcomputer controller obtains the abnormal information of the water surface, it obtains the water flow of the sprinkler pump. If the water flow is ≤50L / Min, it is determined that the water surface is frozen and the process proceeds to step S23;

[0021] S23. The single-chip microcomputer controller sends a start message to the electric heating device to electrically heat the cooling water; the single-chip microcomputer controller also automatically identifies the current freezing point through the temperature sensor and adjusts the start threshold of the stirring mechanism according to the current freezing point.

[0022] The present invention has the following beneficial effects:

[0023] In order to ensure the stable operation of the water spray tower for 24 hours, the present invention arranges a stirring mechanism at the bottom of the water pool, monitors the cooling water temperature through a temperature sensor, and realizes irregular movement through eccentric rotating shaft, rocker swing arm, spring and other parts, which can maximize the cooling water fluctuation. Because the disturbance caused by the flow of water can have a certain destructive effect on the orderly aggregation of water molecules around the condensation nuclei, which can strengthen the prevention of water freezing.

[0024] The present invention adds an electric heating device in the water spraying tower, and adds a visual monitoring system at the wall of the water spraying tower to perform real-time synchronous scanning (3 times / Min) through a linear array camera, and compares and analyzes the images collected by the camera to identify the water surface fluctuation at the top of the water pool. Through comparison, if the image shows that the water surface is stable, it is regarded as abnormal, and the information is synchronously sent to the single-chip microcomputer controller. The single-chip microcomputer controller will control the electric heating belt to start working, perform heating and thawing processing, and prevent the spray pump from being damaged by dry burning.

[0025] Due to uncertain factors such as natural volatilization of antifreeze, the freezing point temperature will gradually increase. The final freezing point temperature can be monitored based on visual monitoring and real-time temperature monitoring. The single-chip microcomputer controller will automatically update the data in real time based on the last updated freezing point, and automatically re-set the starting threshold of the stirring mechanism based on the latest freezing point, thus realizing the synchronous operation of visual monitoring and temperature detection.

[0026] The present invention adds a flow sensor at the rear end of the spray pump 6 to monitor in real time whether the water flow is normal. For example, when the water flow is ≤50L / Min, analysis is performed based on the visual monitoring results to determine whether it is caused by water freezing or the spray pump itself fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the water spray temperature control system of a new energy dynamometer stand water spray tower described in Example 1 of the present invention;

[0029] Figure 2 This is a flow chart of the control method described in Example 2 of the present invention;

[0030] In the figure:

[0031] 1- spray pump; 2- temperature sensor; 3- motor; 4- eccentric rotary shaft; 5- rocker swing arm; 6- spring; 7- electric heating belt; 8- visual monitoring system; 9- flow sensor. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Example 1

[0038] like Figure 1As shown, this embodiment is a water spray temperature control system for a new energy dynamometer test bench water tower, including a spray pump 1, a stirring mechanism, a visual monitoring system, an electric heating device, a temperature sensor 2, a flow sensor 7 and a single-chip controller; the spray pump 1 is arranged in a water pool of the water tower; the stirring mechanism is arranged at the bottom of the water pool of the water tower; the visual monitoring system is arranged on the wall of the water tower to monitor the freezing of the water surface of the water pool; the electric heating device is arranged in the water pool to heat the cooling water; the temperature sensor 2 is arranged in the water pool to monitor the cooling water temperature; the flow sensor 7 is installed at the rear end of the spray pump 1 to monitor the water flow in real time; the single-chip controller is respectively connected to the stirring mechanism, the visual monitoring system, The electric heating device, temperature sensor 2 and flow sensor 7 are communicatively connected; the temperature sensor 2 sends the cooling water temperature to the single-chip microcomputer controller in real time, and the single-chip microcomputer controller controls the stirring mechanism to work or stop working according to the set threshold value to prevent the cooling water from freezing; the visual monitoring system recognizes whether the water surface is frozen based on the real-time image of the pool, and transmits the recognition result to the single-chip microcomputer controller; the flow sensor 7 sends the sprinkler pump water flow to the single-chip microcomputer controller, and the single-chip microcomputer combines the recognition result of the water flow machine visual monitoring system to determine whether the water surface is frozen; when the single-chip microcomputer controller determines that the water surface is frozen, on the one hand, it recognizes the current freezing point through the temperature sensor 2, and at the same time controls the electric heating device to start and heat the cooling water.

[0039] The stirring mechanism includes a motor 3, an eccentric rotating shaft 4, a rocker rotating arm 5 and a spring 6; the motor 3 is started or stopped by the single-chip controller command; the output end of the motor 3 is connected to the eccentric rotating shaft 4, a plurality of rocker rotating arms 5 are connected to the eccentric rotating shaft 4, and a spring 6 is arranged between the rocker rotating arm 5 and the eccentric rotating shaft 4; the rocker rotating arm 5 realizes irregular movement under the drive of the motor 3, which can maximize the cooling water fluctuation, because the disturbance caused by the flow of water can have a certain destructive effect on the orderly aggregation of water molecules around the condensation nuclei, which can strengthen the prevention of water freezing.

[0040] There are multiple temperature sensors 2, which are distributed at different positions in the cooling water pool.

[0041] The visual monitoring system 8 includes a linear array camera and an image processing module. The linear array camera performs real-time synchronous scanning (3 times / Min). The image processing module compares and analyzes the images collected by the camera to identify the water surface fluctuations at the top of the pool. Through comparison, if the image shows that the water surface is stable, it is considered abnormal and the information is sent synchronously to the single-chip controller.

[0042] The electric heating device comprises a solid-state relay and an electric heating belt 7. The electric heating belt 7 is coiled in the water pool of the water shower tower. The solid-state relay is connected to the single-chip microcomputer controller.

[0043] Antifreeze is added into the water pool of the water shower tower to ensure that the cooling water does not freeze at -10°C.

[0044] Example 2

[0045] This embodiment is a control method for a water spraying temperature control system of a new energy dynamometer stand water spraying tower described in Embodiment 1, such as Figure 2 As shown, including:

[0046] S1. Control the stirring mechanism to start or stop working according to the cooling water temperature:

[0047] S11. The temperature of the cooling water in the pool is monitored by a temperature sensor and sent to the single-chip controller. If the water temperature is lower than the start threshold, in this implementation, the start threshold is T 水 ≤-10℃, then go to step S12; otherwise go to step S13;

[0048] S12. The microcontroller controller sends a control command to the stirring mechanism to start the stirring mechanism to perform irregular motion, enhance the fluctuation of the cooling water, and prevent ice formation; after the stirring mechanism is started for a certain period of time, the process proceeds to step S13;

[0049] S13. If the water temperature is higher than the stop threshold, in this implementation, the stop threshold is T 水 >-8°C, the stirring mechanism is controlled to be in a stopped state and the process goes to step S2;

[0050] S2. Use the visual monitoring system to monitor whether the pool water surface is frozen, and control the electric heating device to start or stop working according to the freezing situation of the water surface:

[0051] S21. Monitor the fluctuation of the water surface of the pool through the visual monitoring system. If there is no fluctuation on the water surface, it is considered abnormal, and the abnormal water surface information is sent to the single-chip controller;

[0052] S22. After the microcontroller controller obtains the abnormal water surface information, it obtains the water flow of the sprinkler pump through the flow sensor. If the water flow is ≤50L / Min, it is determined that the water surface is frozen and enters step S23;

[0053] S23. The single-chip microcomputer controller sends a start message to the electric heating device to electrically heat the cooling water; the single-chip microcomputer controller also automatically identifies the current freezing point through the temperature sensor and adjusts the start threshold of the stirring mechanism according to the current freezing point.

[0054] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention. These simple variations all belong to the protection scope of the present invention.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0056] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A water spraying temperature control system for a new energy dynamometer stand water tower, characterized in that: It includes a spray pump, a stirring mechanism, a visual monitoring system, an electric heating device, a temperature sensor and a single-chip microcomputer controller; the spray pump is arranged in a water pool of a water spray tower; the stirring mechanism is arranged at the bottom of the water pool of the water spray tower; the visual monitoring system is arranged on the wall of the water spray tower to monitor the fluctuation of the water surface in the water pool; the electric heating device is arranged in the water pool; the temperature sensor is arranged in the water pool to monitor the cooling water temperature; the single-chip microcomputer controller is respectively communicated with the stirring mechanism, the visual monitoring system, the electric heating device and the temperature sensor; the temperature sensor sends the cooling water temperature to the single-chip microcomputer controller in real time, and the single-chip microcomputer controller controls the stirring mechanism to work or stop working according to the set threshold value to prevent the cooling water from freezing; the visual monitoring system identifies whether the water surface is frozen according to the real-time image of the water pool, and transmits the identification result to the single-chip microcomputer controller; when the single-chip microcomputer controller determines that the water surface is frozen, the current freezing point is identified by the temperature sensor, and the electric heating device is controlled to start at the same time to heat the cooling water.

2. A water spraying temperature control system for a water tower of a new energy dynamometer stand as claimed in claim 1, characterized in that: The stirring mechanism includes a motor, an eccentric rotating shaft and a rocker rotating arm; the motor is started or stopped by the instructions of the single-chip controller; the output end of the motor is connected to the eccentric rotating shaft, and multiple rocker rotating arms are connected to the eccentric rotating shaft, and the rocker rotating arms realize irregular motion under the drive of the motor.

3. A water spraying temperature control system for a new energy dynamometer stand water spraying tower as claimed in claim 2, characterized in that: In the stirring mechanism, a spring is arranged between the rocker rotating arm and the eccentric rotating shaft.

4. A water spraying temperature control system for a new energy dynamometer stand water spraying tower as claimed in claim 1, characterized in that: There are multiple temperature sensors distributed at different positions in the cooling water pool.

5. A water spraying temperature control system for a water tower of a new energy dynamometer stand as claimed in claim 1, characterized in that: The visual monitoring system includes a linear array camera and an image processing module. The linear array camera performs real-time synchronous scanning. The image processing module compares and analyzes the images collected by the camera to identify the water surface fluctuations at the top of the pool. Through comparison, if the image shows that the water surface is stable, it is considered abnormal and the information is sent synchronously to the single-chip controller.

6. A water spraying temperature control system for a water tower of a new energy dynamometer stand as claimed in claim 1, characterized in that: The electric heating device comprises a solid-state relay and an electric heating belt. The electric heating belt is arranged in a water pool of a water shower tower. The solid-state relay is connected to the single-chip microcomputer controller.

7. A water spraying temperature control system for a new energy dynamometer stand water spraying tower as claimed in claim 1, characterized in that: It also includes a flow sensor installed at the rear end of the spray pump. The flow sensor sends the water flow of the spray pump to the single-chip microcomputer controller. The single-chip microcomputer combines the water flow and the recognition result of the visual monitoring system to determine whether the water surface is frozen.

8. A water spraying temperature control system for a water tower of a new energy dynamometer stand as claimed in claim 1, characterized in that: Antifreeze is added into the water pool of the water shower tower.

9. A control method for a water spray temperature control system of a new energy dynamometer stand water spray tower according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Control the stirring mechanism to start or stop working according to the cooling water temperature: S11. The cooling water temperature in the pool is monitored by a temperature sensor and sent to the microcontroller controller. If the water temperature is lower than the start threshold, the process proceeds to step S12; otherwise, the process proceeds to step S13; S12. The single-chip microcomputer controller sends a control instruction to the stirring mechanism to start the stirring mechanism to perform irregular motion to prevent ice formation; after the stirring mechanism is started for a certain period of time, step S13 is entered; S13. If the water temperature is higher than the stop threshold, the stirring mechanism is controlled to stop working and proceed to step S2; S2. Control the electric heating device to start or stop working according to the ice conditions on the water surface: S21. Monitor the fluctuation of the water surface of the pool through the visual monitoring system. If there is no fluctuation on the water surface, it is considered abnormal, and the abnormal water surface information is sent to the single-chip controller; S22. After the single-chip microcomputer controller obtains the abnormal information of the water surface, it obtains the water flow of the sprinkler pump. If the water flow is ≤50L / Min, it is determined that the water surface is frozen and the process proceeds to step S23; S23. The microcontroller controller sends a start message to the electric heating device to electrically heat the cooling water; The single chip microcomputer controller also automatically identifies the current freezing point through the temperature sensor and adjusts the starting threshold of the stirring mechanism according to the current freezing point.

Images