CN111715126B

CN111715126B - Control method and control device of preparation device of urea solution for vehicle and processor

Info

Publication number: CN111715126B
Application number: CN202010567807.9A
Authority: CN
Inventors: 王鹏博; 黄家峰; 杨春雷; 曾威; 符加园; 桑孟祥
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2022-10-28
Anticipated expiration: 2040-06-19
Also published as: CN111715126A

Abstract

The application provides a control method, a control device and a processor of a preparation device of a vehicle urea solution, wherein the method comprises the following steps: controlling the opening of the feed opening to enable urea particles of the storage equipment to be added into the stirring device; controlling the feed opening to be closed under the condition that the reading variable quantity of the weighing device is equal to the preset mass, wherein the preset mass is the set feeding quantity of the urea particles; determining the water injection quantity according to the preset mass and the preset concentration; controlling the first valve to be opened so that pure water with a preset temperature in the hot water storage equipment is added into the stirring device; controlling the feed opening to be closed under the condition that the indication variable quantity of the flow detection device is equal to the water injection quantity; controlling the stirring device to stir the pure water and the urea particles to obtain a finished product urea solution. Compared with the prior art that feeding is carried out through manual weighing, the method improves the automation level of the preparation device of the urea solution for the vehicle, saves labor cost and time cost, avoids errors caused by manual weighing, and improves the qualification rate of finished urea solution.

Description

Control method and control device of preparation device of urea solution for vehicle and processor

Technical Field

The application relates to the field of preparation of urea for vehicles, in particular to a control method and a control device of a preparation device of urea solution for vehicles, a computer-readable storage medium, a processor and a preparation system of urea solution for vehicles.

Background

The selective catalytic reduction SCR system using automobile urea as a reducing agent is a novel technology for purifying tail gas by utilizing nitrogen and water generated by the reaction of automobile urea aqueous solution and nitrogen oxide in the tail gas of diesel vehicles such as heavy trucks, buses and the like, so that the discharged nitrogen oxide reaches the national V emission standard or even higher.

The traditional preparation method of the urea solution for the vehicle is rough and tedious, needs the steps of manual weighing and blanking, proportion calculation and water injection, sampling and detection of the concentration of the solution and the like, cannot form a standard system, not only consumes labor time, but also easily causes unqualified concentration of the urea solution to influence the quality of products.

The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

Disclosure of Invention

The main purpose of the present application is to provide a control method and a control device for a vehicle urea solution preparation device, a computer-readable storage medium, a processor, and a vehicle urea solution preparation system, so as to solve the problem that the preparation of a vehicle urea solution in the prior art is time-consuming and labor-consuming.

According to an aspect of an embodiment of the present invention, there is provided a method for controlling a device for preparing a urea solution for a vehicle, the device including a hot water storage device, a stirring device, a weighing device, a first valve, and a flow detection device, the weighing device being located at a bottom of the storage device, a feeding port of the storage device being connected to the stirring device, and the first valve and the flow detection device being located on a connection pipe between the hot water storage device and the stirring device, the method including: controlling the feed opening to be opened so that urea particles of the storage equipment are added into the stirring device; controlling the feed opening to be closed under the condition that the indication variable quantity of the weighing device is equal to a preset mass, wherein the preset mass is the set feeding quantity of the urea particles; determining the water injection quantity according to the preset mass and the preset concentration; controlling the first valve to be opened so that pure water with a preset temperature in the hot water storage equipment is added into the stirring device; controlling the feed opening to be closed under the condition that the indication variable quantity of the flow detection device is equal to the water injection quantity; and controlling the stirring device to stir the pure water and the urea particles to obtain a finished product urea solution.

Optionally, the stirring apparatus includes a solution outlet and a solution inlet, the preparation apparatus further includes a circulation pipeline, a circulation pump and a concentration detection apparatus, the circulation pump and the concentration detection apparatus are all located on the circulation pipeline, one end of the circulation pipeline is communicated with the solution outlet of the stirring apparatus, the other end of the circulation pipeline is communicated with the solution inlet of the stirring apparatus, and the stirring apparatus is controlled to stir the pure water and the urea particles to obtain a finished product urea solution, including: under the condition that the stirring time reaches the preset time, controlling the circulating pump to start so that the urea solution in the stirring device circularly flows in the circulating pipeline; controlling the concentration detection device to detect the concentration of the urea solution in the circulating pipeline to obtain a detected concentration; and under the condition that a first difference value is within a preset range, controlling the stirring device to stop stirring, and determining that the finished product urea solution is qualified, wherein the first difference value is the difference value between the detected concentration and the preset concentration.

Optionally, controlling the stirring device to stir the pure water and the urea granules to obtain a finished urea solution, further comprising: and under the condition that the stirring time reaches the preset stirring time and the first difference value is not in the preset range, controlling the stirring device to stop stirring, and determining that the finished urea solution is unqualified.

Optionally, the preparation apparatus further comprises a product tank and a second valve, the second valve is located on a connection pipeline between the product tank and the stirring apparatus, and after controlling the stirring apparatus to stir the pure water and the urea particles to obtain a product urea solution, the method further comprises: and under the condition that the finished urea solution is determined to be qualified, controlling the opening of the second valve to enable the finished urea solution to flow into the finished tank.

Optionally, after controlling the stirring device to stir the pure water and the urea granules to obtain a finished urea solution, the method further comprises: and sending prompt information under the condition that the finished product urea solution is determined to be unqualified, wherein the prompt information is used for prompting that the finished product urea solution is unqualified and needs manual treatment.

Optionally, the preparation apparatus further includes a feeding device, the feeding device is connected to the storage device, and before controlling the first valve to open, the method further includes: acquiring the reading of the weighing device; calculating the difference between the indication of the weighing device and the preset mass to obtain a second difference; and under the condition that the second difference value is smaller than a preset difference value, controlling the feeding device to add the urea particles into the storage equipment.

Optionally, the preparation apparatus further includes a pure water storage device, the pure water storage device is connected to the storage device, the hot water storage device includes a liquid level meter, and before controlling the feed opening to be opened, the method further includes: acquiring the indication number of the liquid level meter; and under the condition that the indication number of the liquid level instrument is smaller than the preset liquid level, controlling the pure water storage equipment to add the pure water into the hot water storage equipment.

According to another aspect of the embodiment of the present invention, there is further provided a control device of a preparation apparatus of a urea solution for a vehicle, the preparation apparatus includes a hot water storage device, a stirring device, a weighing device, a first valve, and a flow detection device, the weighing device is located at the bottom of the storage device, a feeding port of the storage device is connected to the stirring device, the first valve and the flow detection device are both located on a connection pipeline between the hot water storage device and the stirring device, and the apparatus includes: the first control unit is used for controlling the feed opening to be opened so that urea particles of the storage equipment are added into the stirring device; the second control unit is used for controlling the feed opening to be closed under the condition that the indicated variable quantity of the weighing device is equal to a preset mass, and the preset mass is the set feeding quantity of the urea particles; the determining unit is used for determining the water injection quantity according to the preset mass and the preset concentration, and the preset concentration is the concentration of the required urea solution; the third control unit is used for controlling the first valve to be opened so that pure water with a preset temperature in the hot water storage equipment is added into the stirring device; the fourth control unit is used for controlling the feed opening to be closed under the condition that the indication variable quantity of the flow detection device is equal to the water injection quantity; and the fifth control unit is used for controlling the stirring device to stir the pure water and the urea particles to obtain a finished product urea solution.

According to still another aspect of embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program executes any one of the control methods.

According to another aspect of the embodiments of the present invention, there is further provided a processor, where the processor is configured to execute a program, where the program executes any one of the control methods when running.

According to another aspect of the embodiment of the invention, a system for preparing a urea solution for a vehicle is further provided, and the system comprises a device for preparing a urea solution for a vehicle and a control device, wherein the control device executes any one of the control methods.

In an embodiment of the present invention, in the control method, first, the opening of the feeding port is controlled to allow the urea granules in the storage facility to be fed into the stirring apparatus, then, when a change in a reading of a weighing apparatus is equal to a predetermined mass, the closing of the feeding port is controlled, the predetermined mass is a set feeding amount of the urea granules, and the change in the reading is a change in the reading from the opening of the feeding port to a current process, then, a water feeding amount is determined according to the predetermined mass and a predetermined concentration, then, the opening of the first valve is controlled to allow pure water at a predetermined temperature in the hot water storage facility to be fed into the stirring apparatus, and then, when the change in the reading of the flow detection apparatus is equal to the water feeding amount, the closing of the feeding port is controlled, and finally, the stirring apparatus is controlled to stir the pure water and the urea granules for a predetermined stirring time, so as to obtain the finished urea solution. According to the control method, the urea particle adding amount is accurately controlled through the indication of the weighing device, so that the urea preparation particle adding amount is equal to the preset mass, the corresponding water injection amount is calculated through the preset mass and the preset concentration, and the pure water adding amount at the preset temperature is accurately controlled through the indication of the flow detection device, so that the pure water adding amount at the preset temperature is equal to the water injection amount.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

fig. 1 shows a flow chart of a control method of a plant for the preparation of a urea solution for vehicles according to an embodiment of the present application;

FIG. 2 shows a schematic view of a control device of a plant for the preparation of a urea solution for vehicles according to an embodiment of the present application; and

fig. 3 shows a flow chart of a control method of a urea solution preparation apparatus for a vehicle according to another embodiment of the present application.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.

As mentioned in the background of the invention, in order to solve the above problems, in the prior art, the preparation of urea solution for vehicles is time-consuming and labor-consuming, and in an exemplary embodiment of the present application, a control method for a preparation apparatus of urea solution for vehicles, a control apparatus, a computer readable storage medium, a processor, and a preparation system of urea solution for vehicles are provided.

According to an embodiment of the application, a control method of a preparation device of a vehicle urea solution is provided, the preparation device comprises a hot water storage device, a stirring device, a weighing device, a first valve and a flow detection device, the weighing device is located at the bottom of the storage device, a feed opening of the storage device is connected with the stirring device, and the first valve and the flow detection device are both located on a connecting pipeline of the hot water storage device and the stirring device.

Fig. 1 is a flowchart of a control method of a urea solution production apparatus for a vehicle according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:

step S101, controlling the feed opening to be opened, so that urea particles of the storage equipment are added into the stirring device;

step S102, controlling the feed opening to be closed under the condition that the indication quantity variation of the weighing device is equal to a preset mass, wherein the preset mass is the set feeding quantity of the urea particles;

step S103, determining the water injection quantity according to the preset mass and the preset concentration;

step S104, controlling the first valve to open, so that pure water with a preset temperature in the hot water storage device is added into the stirring device;

step S105, controlling the closing of the feed opening when the indication quantity variation of the flow detection device is equal to the water injection quantity;

and S106, controlling the stirring device to stir the pure water and the urea particles for a preset stirring time to obtain a finished product urea solution.

In the control method, firstly, the opening of the feed opening is controlled to enable the urea particles in the storage device to be added into the stirring device, then, the closing of the feed opening is controlled under the condition that the index variation of the weighing device is equal to the preset mass, the preset mass is the set feeding amount of the urea particles, the index variation is the index variation of the current process from the opening of the feed opening, then, the water injection amount is determined according to the preset mass and the preset concentration, then, the opening of the first valve is controlled to enable pure water at the preset temperature in the hot water storage device to be added into the stirring device, then, the closing of the feed opening is controlled under the condition that the index variation of the flow detection device is equal to the water injection amount, and finally, the stirring device is controlled to stir the pure water and the urea particles for the preset stirring time to obtain the finished urea solution. According to the control method, the adding amount of the urea granules is accurately controlled through the indication of the weighing device, so that the adding amount of the urea-making granules is equal to the preset mass, the corresponding water injection amount is calculated through the preset mass and the preset concentration, and the adding amount of the pure water at the preset temperature is accurately controlled through the indication of the flow detection device, so that the adding amount of the pure water at the preset temperature is equal to the water injection amount.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

In an embodiment of the present application, the hot water storage device includes a heating device and a temperature detection device, the heating device may be a resistance wire, the temperature detection device may be a temperature sensor, the temperature detection device detects the temperature of pure water in the hot water storage device, and controls the power of the heating device according to a difference between the temperature and a predetermined temperature, so that the temperature of pure water in the hot water storage device is maintained at the predetermined temperature.

In an embodiment of the present application, the stirring apparatus includes a solution outlet and a solution inlet, the preparation apparatus further includes a circulation pipeline, a circulation pump and a concentration detection device, the circulation pump and the concentration detection device are both located on the circulation pipeline, one end of the circulation pipeline is communicated with the solution outlet of the stirring apparatus, the other end of the circulation pipeline is communicated with the solution inlet of the stirring apparatus, the stirring apparatus is controlled to stir the pure water and the urea particles, and a finished urea solution is obtained, including: under the condition that the stirring time reaches the preset time, controlling the circulating pump to start so that the urea solution in the stirring device circularly flows in the circulating pipeline; controlling the concentration detection device to detect the concentration of the urea solution in the circulating pipeline to obtain the detected concentration; and controlling the stirring device to stop stirring when a first difference value is within a preset range, and determining that the finished product urea solution is qualified, wherein the first difference value is the difference value between the detected concentration and the preset concentration. Specifically, the circulating pump is controlled to be started, so that the urea solution in the stirring device circularly flows in the circulating pipeline, the concentration of the urea solution can be detected, and under the condition that the error of the concentration of the urea solution is within a preset range, the finished product urea solution is determined to be qualified, namely, the urea particles are determined to be completely dissolved, so that the stirring device is controlled to stop stirring, and the preparation efficiency is improved.

It should be noted that the detected concentration is not the current reading of the concentration detection device, and in the case that the difference between the readings of the consecutive concentration detection devices is less than a predetermined value, the average value of the readings of the concentration detection devices can be determined as the detected concentration, and those skilled in the art can select an appropriate predetermined value according to actual situations to improve the accuracy of detection, for example, the predetermined value is 0.5%.

It should be noted that the stirring device has a plurality of rotating blades, and the rotating blades are sequentially arranged in the depth direction of the urea solution, so that the urea solution detected by the concentration detection device during the stirring process is randomly collected from the stirring device, thereby ensuring the representativeness of the detected concentration, further improving the detection accuracy, and further improving the qualified rate of the finished urea solution.

In an embodiment of the present application, controlling the stirring device to stir the pure water and the urea granules to obtain a finished urea solution, further includes: and controlling the stirring device to stop stirring and determining that the finished urea solution is unqualified when the stirring time reaches the preset stirring time and the first difference value is not in the preset range. Specifically, when the stirring time reaches the preset stirring time, the stirring can be stopped, and the error of the detected concentration is still out of the preset range, so that the finished product urea solution can be determined to be unqualified, that is, the qualified finished product urea solution cannot be obtained by stirring.

It should be noted that, the predetermined time is less than the predetermined stirring time, the short predetermined time may cause the operation time of the circulating pump and the concentration detection device to be too long, which wastes energy, and the long predetermined time may cause the urea solution to have a qualified concentration before the predetermined stirring time, which may reduce the preparation efficiency.

In an embodiment of the present application, the above preparation apparatus further includes a finished product tank and a second valve, the second valve is located on a connection pipeline between the finished product tank and the stirring device, and after controlling the stirring device to stir the pure water and the urea granules to obtain a finished product urea solution, the above method further includes: and controlling the opening of the second valve to enable the finished product urea solution to flow into the finished product tank under the condition that the finished product urea solution is determined to be qualified. Specifically, when the finished urea solution is determined to be qualified, the finished urea solution can be introduced into a finished tank to be stored for later use.

In an embodiment of the present application, after controlling the stirring device to stir the pure water and the urea granules to obtain a finished urea solution, the method further includes: and sending out prompt information under the condition that the finished product urea solution is determined to be unqualified, wherein the prompt information is used for prompting that the finished product urea solution is unqualified and needs manual treatment. Specifically, under the condition that the finished product urea solution is determined to be unqualified, the qualified finished product urea solution cannot be obtained through stirring, so that prompt information is sent to prompt that the finished product urea solution is unqualified and needs manual treatment, and the condition that the unqualified urea solution enters a finished product tank to influence the quality of the urea solution is avoided.

In one embodiment of the present application, the predetermined range is from-0.7% to 0.7%. Specifically, when the predetermined concentration is 32.5%, the qualified concentration range of the finished urea solution is 31.8% -33.2%, and the concentration of the finished urea solution is within the above range, the finished urea solution can be determined to be qualified, otherwise, the finished urea solution is not qualified.

In an embodiment of the application, the preparation apparatus further includes a feeding device, the feeding device is connected to the storage device, and before controlling the first valve to open, the method further includes: acquiring the reading of the weighing device; calculating the difference between the reading of the weighing device and the preset mass to obtain a second difference; and controlling the feeding device to feed the urea particles into the storage device under the condition that the second difference is smaller than a preset difference. Specifically, before the urea solution is prepared, whether the urea particles in the storage device are sufficient needs to be judged, and the difference between the indication of the weighing device and the predetermined mass is greater than a predetermined difference, so that the urea particles are sufficient, otherwise, the urea particles need to be added to the storage device, for example, the predetermined difference is 20KG, and the urea solution preparation can be started only by ensuring that the difference between the mass of the urea particles in the storage device and the predetermined mass is greater than 20 KG.

It should be noted that the feeding device can be a suction machine, and when urea particles in the storage equipment are insufficient, the suction machine can be started to suck the urea particles into the storage equipment.

In an embodiment of the application, the above preparation apparatus further includes a pure water storage device, the pure water storage device is connected to the above storage device, the above hot water storage device includes a liquid level meter, and before controlling the opening of the above feed opening, the above method further includes: acquiring the reading of the liquid level meter; and under the condition that the indication number of the liquid level instrument is less than the preset liquid level, controlling the pure water storage equipment to add the pure water into the hot water storage equipment. Specifically, before the urea solution is prepared, whether pure water in the hot water storage device is sufficient or not needs to be judged, and the indication number of the liquid level meter is larger than a preset liquid level, so that the pure water in the hot water storage device can be determined to be sufficient, otherwise, the pure water needs to be added into the hot water storage device, and in addition, a proper preset liquid level can be selected by a person skilled in the art according to actual conditions.

The embodiment of the present application further provides a control device for a vehicle urea solution preparation device, and it should be noted that the control device for a vehicle urea solution preparation device of the embodiment of the present application may be used to execute the control method for a vehicle urea solution preparation device provided in the embodiment of the present application. The following is introduced the controlling means of vehicle urea solution's that this application embodiment provided preparation facilities, and above-mentioned preparation facilities includes hot water storage equipment, agitating unit, weighing device, first valve and flow detection device, and above-mentioned weighing device is located the bottom of above-mentioned storage equipment, and the feed opening of above-mentioned storage equipment is connected with above-mentioned agitating unit, and above-mentioned first valve and above-mentioned flow detection device all are located the connecting pipeline of above-mentioned hot water storage equipment and above-mentioned agitating unit.

Fig. 2 is a schematic view of a control device of a urea solution preparation device for a vehicle according to an embodiment of the present application. As shown in fig. 2, the apparatus includes:

the first control unit 10 is used for controlling the opening of the feed opening, so that urea particles in the storage equipment are added into the stirring device;

a second control unit 20 for controlling the closing of the feeding opening in case the reading variation of the weighing device is equal to a predetermined mass, which is a set feeding amount of the urea granules;

a determination unit 30 for determining a water injection amount according to a predetermined mass and a predetermined concentration, the predetermined concentration being a concentration of a required urea solution;

a third control unit 40 for controlling the first valve to open so that pure water of a predetermined temperature in the hot water storage device is added to the stirring device;

a fourth control unit 50 for controlling the closing of the feed opening when the indication quantity variation of the flow rate detection device is equal to the water injection quantity;

a fifth control unit 60, configured to control the stirring device to stir the pure water and the urea granules, so as to obtain a finished urea solution.

In the control device, a first control unit controls the opening of the feed opening to enable urea particles of the storage device to be added into the stirring device, a second control unit controls the closing of the feed opening when the indication variation of the weighing device is equal to a preset mass, the preset mass is the set feeding amount of the urea particles, the indication variation is the indication variation of the current process from the opening of the feed opening, a determining unit determines the water injection amount according to the preset mass and the preset concentration, a third control unit controls the opening of the first valve to enable pure water at a preset temperature in the hot water storage device to be added into the stirring device, a fourth control unit controls the closing of the feed opening when the indication variation of the flow detection device is equal to the water injection amount, and a fifth control unit controls the stirring device to stir the pure water and the urea particles for a preset stirring time to obtain a finished urea solution. The indicating quantity of the urea particles is accurately controlled by the control device through the weighing device, so that the adding quantity of the urea-making particles is equal to the preset quantity, the corresponding water injection quantity is calculated through the preset quantity and the preset concentration, the adding quantity of the pure water at the preset temperature is accurately controlled through the indicating quantity of the flow detection device, the adding quantity of the pure water at the preset temperature is equal to the water injection quantity, compared with the prior art, the automatic level of the preparation device for the vehicle urea solution is improved, the labor cost and the time cost are saved, errors caused by manual weighing are avoided, the errors of the concentration of the finished product urea solution and the preset concentration are greatly reduced, and the qualification rate of the finished product urea solution is improved.

The control device of the urea solution production apparatus for a vehicle may be a PLC controller, but the control device is not limited thereto, and a person skilled in the art may select an appropriate controller as the control device of the urea solution production apparatus for a vehicle according to actual circumstances.

In an embodiment of the present application, the stirring device includes a solution outlet and a solution inlet, the preparation device further includes a circulation pipeline, a circulation pump, and a concentration detection device, the circulation pump and the concentration detection device are both located on the circulation pipeline, one end of the circulation pipeline is communicated with the solution outlet of the stirring device, the other end of the circulation pipeline is communicated with the solution inlet of the stirring device, the fifth control unit includes a first control module, a second control module, and a third control module, wherein the first control module is configured to control the circulation pump to start up when the stirring time reaches a predetermined time, so that the urea solution in the stirring device flows in a circulation manner in the circulation pipeline; the second control module is used for controlling the concentration detection device to detect the concentration of the urea solution in the circulating pipeline to obtain the detected concentration; the third control module is used for controlling the stirring device to stop stirring and determining that the finished product urea solution is qualified under the condition that a first difference value is within a preset range, wherein the first difference value is the difference value between the detected concentration and the preset concentration. Specifically, the circulating pump is controlled to be started, so that the urea solution in the stirring device circularly flows in the circulating pipeline, the concentration of the urea solution can be detected, and under the condition that the error of the concentration of the urea solution is within a preset range, the finished product urea solution is determined to be qualified, namely the urea particles are determined to be completely dissolved, so that the stirring device is controlled to stop stirring, and the preparation efficiency is improved.

It should be further noted that the stirring device has a plurality of rotating blades, and the rotating blades are sequentially arranged in the depth direction of the urea solution, so that the urea solution detected by the concentration detection device during the stirring process is randomly collected from the stirring device, thereby ensuring the detection concentration representativeness, further improving the detection accuracy, and further improving the qualification rate of the finished product urea solution.

In an embodiment of the application, the fifth control unit further includes a fourth control module, and the fourth control module is configured to control the stirring device to stop stirring and determine that the finished urea solution is not qualified when the stirring time reaches a predetermined stirring time and the first difference is not within the predetermined range. Specifically, when the stirring time reaches the preset stirring time, the stirring can be stopped, and the error of the detected concentration is still not within the preset range, so that the finished product urea solution can be determined to be unqualified, that is, the qualified finished product urea solution can not be obtained through stirring.

In an embodiment of the present application, the preparation apparatus further includes a product tank and a second valve, the second valve is located on a connection pipeline between the product tank and the stirring device, the apparatus further includes a sixth control unit, and the sixth control unit is configured to control the stirring device to stir the pure water and the urea granules to obtain a product urea solution, and control the second valve to open to allow the product urea solution to flow into the product tank when it is determined that the product urea solution is qualified. Specifically, when the finished urea solution is determined to be qualified, the finished urea solution can be introduced into a finished tank to be stored for later use.

In an embodiment of the application, the apparatus further includes a seventh control unit, where the seventh control unit is configured to, after controlling the stirring device to stir the pure water and the urea granules to obtain a finished urea solution, send a prompt message when determining that the finished urea solution is not qualified, where the prompt message is used to prompt that the finished urea solution is not qualified and needs to be manually processed. Specifically, under the condition that the finished product urea solution is determined to be unqualified, the qualified finished product urea solution cannot be obtained through stirring, so that prompt information is sent to prompt that the finished product urea solution is unqualified and needs manual treatment, and the condition that the unqualified urea solution enters a finished product tank to influence the quality of the urea solution is avoided.

In an embodiment of the application, the preparation apparatus further includes a feeding device, the feeding device is connected to the storage apparatus, the apparatus further includes an eighth control unit, the eighth control unit includes a first obtaining module, a calculating module and a fifth control module, wherein the first obtaining module is configured to obtain the indication number of the weighing device before controlling the first valve to open; the calculating module is used for calculating the difference value between the indicated number of the weighing device and the preset mass to obtain a second difference value; the fifth control module is used for controlling the feeding device to feed the urea particles into the storage device under the condition that the second difference is smaller than a preset difference. Specifically, before the urea solution is prepared, whether the urea particles in the storage device are sufficient needs to be judged, and the difference between the indication of the weighing device and the predetermined mass is greater than a predetermined difference, so that the urea particles are determined to be sufficient, otherwise, the urea particles need to be added to the storage device, for example, the predetermined difference is 20KG, and the urea solution preparation needs to be started only when the difference between the mass of the urea particles in the storage device and the predetermined mass is greater than 20 KG.

In an embodiment of the present application, the preparation apparatus further includes a pure water storage device, the pure water storage device is connected to the storage device, the hot water storage device includes a liquid level meter, the apparatus further includes a ninth control unit, the ninth control unit includes a second obtaining module and a sixth control module, where the second obtaining module is configured to obtain a reading of the liquid level meter before controlling the opening of the feed opening; the sixth control module is used for controlling the pure water storage device to add the pure water into the hot water storage device under the condition that the indication number of the liquid level meter is smaller than the preset liquid level. Specifically, before the urea solution is prepared, whether pure water in the hot water storage device is sufficient or not needs to be judged, and the indication number of the liquid level meter is larger than a preset liquid level, so that the pure water in the hot water storage device can be determined to be sufficient, otherwise, the pure water needs to be added into the hot water storage device, and in addition, a proper preset liquid level can be selected by a person skilled in the art according to actual conditions.

The embodiment of the application further provides a preparation system of the urea solution for the vehicle, which comprises a preparation device of the urea solution for the vehicle, and the preparation system further comprises a control device, wherein the control device executes any one of the control methods.

The preparation system comprises a preparation device and a control device of the urea solution for the vehicle, wherein a first control unit controls a feed opening to be opened so that urea particles of the storage device are added into a stirring device, a second control unit controls the feed opening to be closed when the readout variation of a weighing device is equal to a preset mass, the preset mass is the set feeding amount of the urea particles, the readout variation is the readout variation of the current process from the opening of the feed opening, a determining unit determines the water injection amount according to the preset mass and the preset concentration, a third control unit controls a first valve to be opened so that pure water with a preset temperature in a hot water storage device is added into the stirring device, a fourth control unit controls the feed opening to be closed when the readout variation of the flow detection device is equal to the water injection amount, and a fifth control unit controls the stirring device to stir the pure water and the urea particles for a preset stirring time so as to obtain a finished urea solution. The control device accurately controls the adding amount of the urea particles through the indication of the weighing device, so that the adding amount of the urea-making particles is equal to the preset mass, the corresponding water injection amount is calculated through the preset mass and the preset concentration, and the adding amount of the pure water at the preset temperature is accurately controlled through the indication of the flow detection device, so that the adding amount of the pure water at the preset temperature is equal to the water injection amount.

In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the technical solutions of the present application will be described below with reference to specific embodiments.

Examples

The preparation device for the urea solution for the vehicle comprises a hot water tank, a storage tank, a stirring device, a weighing sensor, a first valve, a flow sensor, a circulating pipeline, a circulating pump, a concentration sensor, a material sucking machine, a pure water tank, a finished product tank and a second valve, wherein the weighing sensor is located at the bottom of the storage tank, a feed opening of the storage tank is connected with the stirring device, the first valve and the flow sensor are both located on a connecting pipeline of the hot water tank and the stirring device, the stirring device comprises a solution outlet and a solution inlet, the circulating pump and the concentration sensor are both located on the circulating pipeline, one end of the circulating pipeline is communicated with the solution outlet of the stirring device, the other end of the circulating pipeline is communicated with the solution inlet of the stirring device, the material sucking machine is connected with the storage tank, the pure water tank is connected with the hot water tank, the hot water tank comprises a liquid level sensor, the liquid level sensor is used for detecting the liquid level of the pure water of the hot water tank, and the second valve is located on a connecting pipeline of the finished product tank and the stirring device.

As shown in fig. 3, the control method of the apparatus for preparing urea solution for a vehicle according to the present application includes the steps of:

judging whether the difference value between the indication number of the weighing sensor and the preset mass is greater than 20KG, if so, carrying out the next step, and if not, controlling a suction machine to add urea particles into a storage tank;

judging whether the indication number of the liquid level sensor is larger than a preset liquid level, if so, carrying out the next step, and if not, controlling a pure water box to add pure water into the hot water tank;

controlling the feed opening to be opened so that the urea particles in the storage tank are added into the stirring device;

judging whether the indication variable quantity of the weighing sensor is equal to the preset mass, if so, controlling the feed opening to be closed, otherwise, keeping the feed opening open;

controlling the first valve to be opened so that the pure water with the preset temperature in the hot water storage device is added into the stirring device;

judging whether the indication variable quantity of the flow sensor is equal to the water injection quantity, if so, controlling the feed opening to be closed, and otherwise, keeping the first valve open;

controlling the stirring device to operate;

judging whether the stirring time is longer than 10min, if so, carrying out the next step, and otherwise, keeping the stirring device running;

controlling the circulating pump to start so that the urea solution in the stirring device circularly flows in the circulating pipeline;

judging whether the difference value between the detection concentration of the concentration sensor and the preset concentration is in a preset range, if so, controlling the stirring device to stop stirring, and controlling the second valve to be opened so that the finished product urea solution flows into the finished product tank; otherwise, carrying out the next step;

and judging whether the stirring time reaches the preset stirring time, if so, controlling the stirring device to stop stirring, sending prompt information to prompt an operator to perform manual treatment, and otherwise, keeping the circulating pump running.

The control device of the preparation device of the vehicle urea solution comprises a processor and a memory, wherein the first control unit, the second control unit, the determination unit, the third control unit, the fourth control unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one inner core can be arranged, and the time and labor are wasted when the urea solution for the vehicle is prepared in the prior art by adjusting the parameters of the inner core.

The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.

An embodiment of the present invention provides a computer-readable storage medium on which a program is stored, the program implementing the above-described control method when executed by a processor.

The embodiment of the invention provides a processor, which is used for running a program, wherein the control method is executed when the program runs.

An embodiment of the present invention provides an apparatus, where the apparatus includes a processor, a memory, and a program that is stored in the memory and is executable on the processor, and when the processor executes the program, at least the following steps are implemented:

step S101, controlling the feed opening to be opened, so that urea particles in the storage equipment are added into the stirring device;

step S104, controlling the first valve to open so that pure water with a preset temperature in the hot water storage equipment is added into the stirring device;

The device herein may be a server, a PC, a PAD, a mobile phone, etc.

The present application further provides a computer program product adapted to perform a program initialized with at least the following method steps when executed on a data processing device:

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a computer-readable storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned computer-readable storage media comprise: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:

1) In the control method, firstly, the opening of the feed port is controlled to enable the urea particles in the storage device to be added into the stirring device, then, when the indication variable quantity of the weighing device is equal to a preset mass, the closing of the feed port is controlled, the preset mass is the set feeding quantity of the urea particles, the indication variable quantity is the indication variable quantity of the process from the opening of the feed port to the current process, then, the water injection quantity is determined according to the preset mass and the preset concentration, then, the opening of the first valve is controlled to enable the pure water at the preset temperature in the hot water storage device to be added into the stirring device, then, when the indication variable quantity of the flow detection device is equal to the water injection quantity, the closing of the feed port is controlled, and finally, the stirring device is controlled to stir the pure water and the urea particles for a preset stirring time to obtain the finished urea solution. According to the control method, the adding amount of the urea granules is accurately controlled through the indication of the weighing device, so that the adding amount of the urea-making granules is equal to the preset mass, the corresponding water injection amount is calculated through the preset mass and the preset concentration, and the adding amount of the pure water at the preset temperature is accurately controlled through the indication of the flow detection device, so that the adding amount of the pure water at the preset temperature is equal to the water injection amount.

2) In the control device, a first control unit controls the opening of the feed opening to enable urea particles of the storage device to be added into the stirring device, a second control unit controls the closing of the feed opening under the condition that the readout variation of a weighing device is equal to a preset mass, the preset mass is the set feeding amount of the urea particles, the readout variation is the readout variation of the current process from the opening of the feed opening, a determining unit determines the water injection amount according to the preset mass and the preset concentration, a third control unit controls the opening of the first valve to enable pure water at a preset temperature in the hot water storage device to be added into the stirring device, a fourth control unit controls the closing of the feed opening under the condition that the readout variation of the flow detection device is equal to the water injection amount, and a fifth control unit controls the stirring device to stir the pure water and the urea particles for a preset stirring time to obtain a finished urea solution. The control device accurately controls the adding amount of the urea particles through the indication of the weighing device, so that the adding amount of the urea-making particles is equal to the preset mass, the corresponding water injection amount is calculated through the preset mass and the preset concentration, and the adding amount of the pure water at the preset temperature is accurately controlled through the indication of the flow detection device, so that the adding amount of the pure water at the preset temperature is equal to the water injection amount.

3) The preparation system comprises a preparation device and a control device for the urea solution for the vehicle, wherein the first control unit controls the feed opening to be opened so that the urea particles in the storage device are added into the stirring device, the second control unit controls the feed opening to be closed when the indication variable quantity of the weighing device is equal to a preset mass, the preset mass is the set feeding amount of the urea particles, the indication variable quantity is the indication variable quantity of the process from the opening of the feed opening to the current process, the determining unit determines the water injection amount according to the preset mass and the preset concentration, the third control unit controls the first valve to be opened so that the pure water at a preset temperature in the hot water storage device is added into the stirring device, the fourth control unit controls the feed opening to be closed when the indication variable quantity of the flow detection device is equal to the water injection amount, and the fifth control unit controls the stirring device to stir the pure water and the urea particles for a preset stirring time so as to obtain a finished urea solution. The indicating quantity of the urea particles is accurately controlled by the control device through the weighing device, so that the adding quantity of the urea-making particles is equal to the preset quantity, the corresponding water injection quantity is calculated through the preset quantity and the preset concentration, the adding quantity of the pure water at the preset temperature is accurately controlled through the indicating quantity of the flow detection device, the adding quantity of the pure water at the preset temperature is equal to the water injection quantity, compared with the prior art, the automatic level of the preparation device for the vehicle urea solution is improved, the labor cost and the time cost are saved, errors caused by manual weighing are avoided, the errors of the concentration of the finished product urea solution and the preset concentration are greatly reduced, and the qualification rate of the finished product urea solution is improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The control method of the preparation device of the urea solution for the vehicle is characterized in that the preparation device comprises a hot water storage device, a stirring device, a weighing device, a first valve and a flow detection device, the weighing device is positioned at the bottom of the storage device, a feed opening of the storage device is connected with the stirring device, the first valve and the flow detection device are both positioned on a connecting pipeline of the hot water storage device and the stirring device, and the method comprises the following steps:

controlling the feed opening to be opened so that urea particles of the storage equipment are added into the stirring device;

controlling the feed opening to be closed under the condition that the indication variable quantity of the weighing device is equal to a preset mass, wherein the preset mass is the set feeding quantity of the urea particles;

determining the water injection quantity according to the preset mass and the preset concentration;

controlling the first valve to be opened so that pure water with a preset temperature in the hot water storage device is added into the stirring device;

controlling the feed opening to be closed under the condition that the indication variable quantity of the flow detection device is equal to the water injection quantity;

controlling the stirring device to stir the pure water and the urea particles to obtain a finished product urea solution,

agitating unit includes solution export and solution entry, the preparation facilities still includes circulation pipeline, circulating pump and concentration detection device, the circulating pump with concentration detection device all is located circulation pipeline, circulation pipeline's one end with agitating unit's solution export intercommunication, circulation pipeline's the other end with agitating unit's solution entry intercommunication, control agitating unit stirs pure water with the urea granule obtains finished product urea solution, includes:

under the condition that the stirring time reaches the preset time, controlling the circulating pump to start so that the urea solution in the stirring device circularly flows in the circulating pipeline;

controlling the concentration detection device to detect the concentration of the urea solution in the circulating pipeline to obtain a detected concentration;

controlling the stirring device to stop stirring under the condition that a first difference value is within a preset range, determining that the finished product urea solution is qualified, wherein the first difference value is the difference value between the detected concentration and the preset concentration,

controlling the stirring device to stir the pure water and the urea particles to obtain a finished product urea solution, and further comprising:

and under the condition that the stirring time reaches the preset stirring time and the first difference value is not in the preset range, controlling the stirring device to stop stirring and determining that the finished urea solution is unqualified.

2. The method of claim 1, wherein the preparation apparatus further comprises a product tank and a second valve, the second valve is located on a connection line between the product tank and the stirring apparatus, and after controlling the stirring apparatus to stir the pure water and the urea particles to obtain a product urea solution, the method further comprises:

and under the condition that the finished urea solution is determined to be qualified, controlling the opening of the second valve to enable the finished urea solution to flow into the finished tank.

3. The method according to claim 1, wherein after controlling the stirring device to stir the pure water and the urea granules to obtain a finished urea solution, the method further comprises:

and sending out prompt information under the condition that the finished product urea solution is determined to be unqualified, wherein the prompt information is used for prompting that the finished product urea solution is unqualified and needs manual treatment.

4. The method according to claim 1, wherein the preparation device further comprises a loading device connected to the stock storage facility, and before controlling the first valve to open, the method further comprises:

acquiring the reading of the weighing device;

calculating the difference between the reading of the weighing device and the preset mass to obtain a second difference;

and under the condition that the second difference value is smaller than a preset difference value, controlling the feeding device to add the urea particles into the storage equipment.

5. The method according to claim 1, wherein the preparation apparatus further comprises a pure water storage device connected to the stock device, the hot water storage device comprises a level gauge, and before controlling the feed opening to open, the method further comprises:

acquiring the indicating number of the liquid level meter;

and under the condition that the indication number of the liquid level meter is less than the preset liquid level, controlling the pure water storage equipment to add the pure water into the hot water storage equipment.

6. The utility model provides a controlling means of automobile-used urea solution's preparation facilities, a serial communication port, the preparation facilities includes hot water storage equipment, agitating unit, weighing device, first valve and flow detection device, weighing device is located the bottom of storage equipment, the feed opening of storage equipment with agitating unit connects, first valve with flow detection device all is located hot water storage equipment with agitating unit's connecting pipeline, the device includes:

the first control unit is used for controlling the feed opening to be opened so that urea particles of the storage equipment are added into the stirring device;

the second control unit is used for controlling the feed opening to be closed under the condition that the indicated variable quantity of the weighing device is equal to a preset mass, and the preset mass is the set feeding quantity of the urea particles;

the determining unit is used for determining the water injection quantity according to the preset mass and the preset concentration, and the preset concentration is the concentration of the required urea solution;

the third control unit is used for controlling the first valve to be opened so that pure water with a preset temperature in the hot water storage equipment is added into the stirring device;

the fourth control unit is used for controlling the feed opening to be closed under the condition that the indication variable quantity of the flow detection device is equal to the water injection quantity;

a fifth control unit for controlling the stirring device to stir the pure water and the urea particles to obtain a finished product urea solution,

the stirring device comprises a solution outlet and a solution inlet, the preparation device further comprises a circulating pipeline, a circulating pump and a concentration detection device, the circulating pump and the concentration detection device are located on the circulating pipeline, one end of the circulating pipeline is communicated with the solution outlet of the stirring device, the other end of the circulating pipeline is communicated with the solution inlet of the stirring device, and the fifth control unit comprises a first control module, a second control module and a third control module, wherein the first control module is used for controlling the starting of the circulating pump under the condition that the stirring time reaches a preset time, so that the urea solution in the stirring device circularly flows in the circulating pipeline; the second control module is used for controlling the concentration detection device to detect the concentration of the urea solution in the circulating pipeline to obtain the detected concentration; the third control module is used for controlling the stirring device to stop stirring and determining that the finished product urea solution is qualified under the condition that a first difference value is within a preset range, wherein the first difference value is the difference value between the detected concentration and the preset concentration,

the fifth control unit further comprises a fourth control module, and the fourth control module is used for controlling the stirring device to stop stirring and determining that the finished urea solution is unqualified when the stirring time reaches the preset stirring time and the first difference value is not in the preset range.

7. A computer-readable storage medium characterized by comprising a stored program, wherein the program executes the control method of any one of claims 1 to 5.

8. A processor, characterized in that the processor is configured to run a program, wherein the program when running performs the control method of any one of claims 1 to 5.

9. A system for preparing a urea solution for a vehicle, comprising a device for preparing a urea solution for a vehicle, characterized in that the system further comprises a control device which performs the control method of any one of claims 1 to 5.