CN115711750A - Automatic testing method and device for automobile PV (photovoltaic) and storage medium - Google Patents
Automatic testing method and device for automobile PV (photovoltaic) and storage medium Download PDFInfo
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- CN115711750A CN115711750A CN202211443302.7A CN202211443302A CN115711750A CN 115711750 A CN115711750 A CN 115711750A CN 202211443302 A CN202211443302 A CN 202211443302A CN 115711750 A CN115711750 A CN 115711750A
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Abstract
The invention provides an automatic testing device, a method and a storage medium for automobile PV (photovoltaic) for automobile testing, which comprises the following steps: the information acquisition device is connected with the brake pedal and is used for acquiring the brake pressure of the brake pedal; the control device is in control signal connection with the information acquisition device; the oil pot is in signal connection with the information acquisition device and is used for amplifying the braking force of the brake pedal into braking pressure; the motor is in signal connection with the information acquisition device and is used for providing braking power to the brake pedal through the information acquisition device; the power supply device is in power supply connection with the control device; the oil pot is connected with a brake hose of the automobile to be tested through an oil pipe. The invention can be matched with calipers of different models at will, and then different test responses can be made with different models.
Description
Technical Field
The invention belongs to the technical field of automatic testing of automobiles, and particularly relates to an automatic testing method and device for automobile PV (photovoltaic) and a storage medium.
Background
The P-V relation refers to the braking liquid demand of the brake under different pressures; the P-V relation of the brake reflects the rigidity level of the brake assembly, directly influences the matching relation among all parts of the brake system, and is also the most important influence factor of the vehicle brake pedal feel; with the discovery of science and technology, the requirement on the feeling of the brake pedal of the automobile in the existing life is higher and higher; three influencing variables of the brake pedal play an important role here, including: pedal force, pedal travel, vehicle deceleration; when other parameters of a vehicle are determined, the brake system influences these three parameters, namely the brake, the vacuum booster with brake fluid and the brake pedal. The brake is used as a braking torque output device for finally applying braking force to the whole vehicle, and the brake has two main performances of influencing the feeling of a brake pedal, namely the brake efficiency (namely the relation between input pressure and output braking torque) and the P-V relation of the brake; the pressure P is generated by the actuation of pedal force F, the brake outputs braking torque under the action of the pressure P, and the braking torque is linked with the deceleration G of the vehicle; meanwhile, the liquid amount required by the brake under each pressure is linked with the pedal stroke S. It can be seen that the P-V relation of the brake is a very important performance parameter of the brake, and the P-V relation has a great influence on the matching of the whole vehicle. In order to enhance the braking performance of the vehicle, the test of the P-V relation becomes an indispensable content in the automobile field, but because the calipers used by the vehicle are different, the prior art can only use one type of caliper as a test device and method, so that the prior art has the problems of low efficiency and high cost.
Based on the above, how to construct an automatic test method suitable for various caliper automobiles P-V becomes a technical problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides an automatic testing method, device and storage medium for automotive PV, so as to solve the above-mentioned deficiencies in the prior art, and therefore the present invention provides the following technical solutions:
an automotive PV automated testing apparatus, comprising: the device comprises a control device, an information acquisition device, a brake pedal, an oil can, a motor and a power supply device;
the information acquisition device is connected with the brake pedal and is used for acquiring the brake pressure of the brake pedal;
the control device is in control signal connection with the information acquisition device;
the oil pot is in signal connection with the information acquisition device and is used for amplifying the braking force of the brake pedal into braking pressure;
the motor is in signal connection with the information acquisition device and is used for providing braking power to the brake pedal through the information acquisition device;
the power supply device is in power supply connection with the control device;
the oil can is connected with a brake hose of the automobile to be tested through an oil pipe.
Preferably, the information acquisition apparatus includes: a pressure sensor and an electronic brake booster GIBS;
the brake pedal is mechanically connected with the electronic brake booster GIBS;
the pressure sensor is in signal connection with the control device, and the pressure sensor is connected with the brake pedal.
Preferably, the control device includes: a computer and a control circuit board;
the computer is connected with the control circuit board through a CAN bus;
the control circuit board is in signal connection with the information acquisition device;
and the power supply device is in power supply connection with the control circuit board.
An automatic test method for automotive PV (photovoltaic) comprises the following steps:
setting a vehicle to be tested under a pretreatment test condition;
presetting a braking pressure threshold value of a vehicle to be tested;
obtaining a test brake pressure based on a preset motor stroke of a vehicle to be tested, and obtaining a liquid demand volume of brake fluid based on the motor stroke;
and constructing a relation curve graph based on the test braking pressure and the required liquid volume to obtain a test result.
Preferably, the pretreatment test conditions are: the brake caliper to be collected is in a non-clamping state, and the EPB of the vehicle to be collected is in a closed state.
Preferably, the obtaining of the liquid volume required by the brake fluid based on the motor stroke specifically includes:
converting the acquired motor stroke into the required liquid volume based on a volume conversion formula;
wherein the volume conversion formula expression is:
V＝S*0.0014-1.7018；
wherein V represents the liquid volume; s represents the motor stroke.
A computer readable storage medium having computer readable instructions stored thereon which, when executed by a computer, cause the computer to perform the steps of the method for automotive PV automated testing.
Compared with the prior art, the invention has the following beneficial effects:
the invention can be matched with calipers of different models at will, and then different test responses can be made with different models.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of the apparatus of the present invention;
Detailed Description
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1:
the embodiment discloses an automatic testing arrangement of car PV includes: the device comprises a control device, an information acquisition device, a brake pedal, an oil can, a motor and a power supply device;
the information acquisition device is connected with the brake pedal and used for acquiring the brake pressure of the brake pedal;
the control device is in control signal connection with the information acquisition device;
the oil pot is in signal connection with the information acquisition device and is used for amplifying the braking force of the brake pedal into braking pressure;
the motor is in signal connection with the information acquisition device and is used for providing braking power to the brake pedal through the information acquisition device;
the power supply device is in power supply connection with the control device;
the oil pot is connected with a brake hose of the automobile to be tested through an oil pipe.
Specifically, the method comprises the following steps:
since the feel of the brake pedal is mainly determined by three parameters: pedal force, pedal travel, and vehicle deceleration; when in test, after other parameters except the above parameters of the vehicle to be tested are all determined, the components influencing the above three parameters are: brakes, boosters, brake pedals; in order to improve the testing efficiency, the electronic brake booster device GIBS is used as a brake and a booster in the embodiment;
in this embodiment, the information acquisition apparatus includes: a pressure sensor and an electronic brake booster GIBS;
the brake pedal is mechanically connected with the electronic brake booster GIBS; the pressure sensor is in signal connection with the control device and is connected with the brake pedal. Wherein, the maximum pressure is less than 16MPa in the embodiment; the pressure measured by the pressure sensor is 0.1Bar.
Wherein, in this embodiment the control device includes: a computer and a control circuit board;
the computer is connected with the control circuit board through a CAN bus;
the control circuit board is in signal connection with the information acquisition device;
the power supply device is connected with the control circuit board in a power supply mode.
In practical application, the computer sends a test control instruction to the control circuit board, and the circuit board controls the motor to rotate based on the test control instruction to generate braking power; based on that the brake pedal and the motor are both connected with the GIBS device, the brake pedal generates braking force, the braking force is monitored by the pressure sensor and displayed and stored on the computer; the brake fluid in the oil can amplifies the braking force into braking pressure and transmits the braking pressure to the vehicle to be tested; and the computer obtains the liquid volume required for braking based on the motor stroke and a motor stroke-liquid volume required conversion formula and generates a relation curve of the liquid volume required for braking and the braking pressure.
Example 2:
an automatic test method for automotive PV (photovoltaic) comprises the following steps:
setting a vehicle to be tested under a pretreatment test condition;
presetting a brake pressure threshold value of a vehicle to be tested;
acquiring a test brake pressure based on a preset motor stroke of a vehicle to be tested;
obtaining the required liquid volume of the brake fluid based on the preset motor stroke;
and constructing a relation curve graph based on the testing brake pressure and the required liquid volume to obtain a testing result.
Specifically, the method comprises the following steps:
in the present embodiment specifically: before PV collection is performed on the vehicle to be measured, in the embodiment, it is necessary to ensure that the brake caliper of the vehicle to be measured, which needs to be collected, is in the non-clamping state and the EPB of the vehicle to be measured is in the closed state. The pretreatment test conditions were therefore: the brake caliper to be collected is in a non-clamping state and the EPB of the vehicle to be measured is in a closing state. In actual operation, confirming that a vehicle to be tested is in a pretreatment test condition, performing exhaust treatment on the acquisition device used in the embodiment through a preset control instruction, and then connecting the acquisition device with a brake caliper;
furthermore, in the embodiment, when the acquisition operation is performed, the motor stroke Target-Position needs to be preset, in the embodiment, the magnitude of the test brake pressure is controlled by setting the magnitude of the motor stroke, and the motor stroke Target-Position is acquired in real time by monitoring the pressure sensor of the brake pedal;
in this embodiment, obtaining the liquid volume required by the brake fluid based on the motor stroke specifically includes:
converting the acquired motor stroke into the liquid-needed volume based on a volume conversion formula;
wherein the volume conversion formula expression is:
V＝S*0.0014-1.7018；
wherein V represents the required liquid volume; s represents a motor stroke.
In addition, during actual testing, multiple pressurization tests are executed through a control instruction sent by a computer serving as a control end, and the minimum test brake pressure obtained by the minimum limit motor stroke is selected for testing during the first test so as to obtain different test brake pressures, and the CAN Message recorded by the Message function is stored; finding out the stored CAN message in the Data Analysis function of the computer, selecting a Pressure Signal and a Liquid Volume Signal, and storing the Signal in a Data menu bar of a control platform of the computer; and selecting the pressurizing section data in the stored data, converting the pressurizing section data into a P or V value under the control of a computer according to a preset conversion formula, and generating a corresponding PV relation curve to finish the acquisition process.
Example 3:
a computer readable storage medium having computer readable instructions stored thereon which, when executed by a computer, cause the computer to perform the steps of a method for automated testing of automotive PV.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (7)
1. An automatic testing arrangement of car PV, characterized by, includes: the device comprises a control device, an information acquisition device, a brake pedal, an oil can, a motor and a power supply device;
the information acquisition device is connected with the brake pedal and is used for acquiring the brake pressure of the brake pedal;
the control device is in control signal connection with the information acquisition device;
the oil pot is in signal connection with the information acquisition device and is used for amplifying the braking force of the brake pedal into braking pressure;
the motor is in signal connection with the information acquisition device and is used for providing braking power to the brake pedal through the information acquisition device;
the power supply device is in power supply connection with the control device;
the oil pot is connected with a brake hose of the automobile to be tested through an oil pipe.
2. The automated automotive PV testing apparatus of claim 1, wherein the information collection device comprises: a pressure sensor and an electronic brake booster GIBS;
the electronic brake booster GIBS is mechanically connected with the brake pedal;
the pressure sensor is in signal connection with the control device, and the pressure sensor is connected with the brake pedal.
3. The automated automotive PV testing apparatus of claim 1, wherein the control apparatus comprises: a computer and a control circuit board;
the computer is connected with the control circuit board through a CAN bus;
the control circuit board is in control signal connection with the information acquisition device;
and the power supply device is in power supply connection with the control circuit board.
4. An automatic test method for automobile PV is characterized by comprising the following steps:
setting a vehicle to be tested under a pretreatment test condition;
presetting a brake pressure threshold value of a vehicle to be tested;
obtaining a test brake pressure based on a preset motor stroke of a vehicle to be tested;
obtaining the liquid volume required by the brake liquid based on the motor stroke;
and constructing a relation curve graph based on the test brake pressure and the required liquid volume, and comparing the relation curve graph with a P-V relation curve graph in a standard range to obtain a test result.
5. The automated automotive PV testing method of claim 4 in which the pre-processing test conditions are: the brake caliper to be collected is in a non-clamping state and the EPB of the vehicle to be measured is in a closing state.
6. The automatic automotive PV testing method of claim 4, wherein obtaining a liquid volume required for brake fluid based on the motor stroke specifically comprises:
converting the acquired motor stroke into the required liquid volume based on a volume conversion formula;
wherein the volume conversion formula expression is as follows:
V＝S*0.0014-1.7018；
wherein V represents the liquid demand volume; s represents the motor stroke.
7. A computer readable storage medium having computer readable instructions stored thereon which, when executed by a computer, cause the computer to perform the steps of a method for automated testing of automotive PV as claimed in any one of claims 4 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211443302.7A CN115711750A (en) | 2022-11-17 | 2022-11-17 | Automatic testing method and device for automobile PV (photovoltaic) and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211443302.7A CN115711750A (en) | 2022-11-17 | 2022-11-17 | Automatic testing method and device for automobile PV (photovoltaic) and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118438991A (en) * | 2024-07-08 | 2024-08-06 | 格陆博科技有限公司 | Onebox built-in P-V acquisition and parameter identification system |
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- 2022-11-17 CN CN202211443302.7A patent/CN115711750A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118438991A (en) * | 2024-07-08 | 2024-08-06 | 格陆博科技有限公司 | Onebox built-in P-V acquisition and parameter identification system |
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