An engine and fan testing apparatus and system

Abstract

This utility model discloses a testing device and system for an engine and a fan, including a test bench, an engine control unit connected to the test bench for controlling the engine, a photoelectric sensor for detecting the fan speed, and a data processing circuit for converting the output signal of the photoelectric sensor into a digital speed signal and transmitting it to the test bench. By setting up the photoelectric sensor and data processing circuit, the fan speed is detected, providing a hardware basis for determining whether the silicone oil fan is engaged or disengaged from the engine.

Description

Technical Field

[0001] This utility model relates to the field of engine and fan testing technology, and in particular to a testing device and system for engines and fans. Background Technology

[0002] During fan and engine testing, a test bench is used for control, and engine rotation is controlled via an engine control unit connected to the bench. Fan and engine testing includes fan selection testing and fuel consumption testing.

[0003] During the fan selection process, it is necessary to match the engine with the silicone oil fan. During matching, the temperature of the temperature sensor at the front end of the silicone oil fan is typically used to determine the fan's engagement and disengagement status. However, because the heat transfer of the metal strain gauge at the front end of the silicone oil fan is affected by airflow and ambient temperature, there is a certain delay in heat transfer, making it impossible to determine in a timely manner whether the silicone oil fan is engaged or disengaged during the matching process.

[0004] In fuel consumption tests, it is necessary to determine the operating status of the fan. When the engine coolant temperature is low, it is clearly required that the silicone oil fan be disconnected, but there is no effective measurement method to determine that the fan is disconnected.

[0005] During long-term testing, the inventors discovered that detecting the fan speed can effectively determine whether the silicone oil fan is engaged or disengaged from the engine. However, there is currently no hardware structure to implement the above method. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a testing device and system for engines and fans.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] The first aspect of this utility model provides a testing device for an engine and a fan, including a test bench, an engine control unit connected to the test bench for controlling the engine, and further comprising:

[0009] Photoelectric sensor used to detect fan speed;

[0010] The data processing circuit is used to convert the output signal of the photoelectric sensor into a digital speed signal and transmit it to the test bench.

[0011] In one possible design, the data processing circuit includes:

[0012] A control module for converting the output signal of the photoelectric sensor into an analog speed signal;

[0013] An optocoupler module for enabling signal coupling between the control module and the photoelectric sensor;

[0014] The AD signal acquisition module is used to convert the output signal of the control module into a digital signal and transmit it to the test bench.

[0015] The second aspect of this utility model provides an engine and fan testing system, including an engine and fan testing device as described in the first aspect, an engine electrically connected to the engine control unit, and a silicone oil fan connected to the engine.

[0016] This utility model has the following advantages:

[0017] This solution uses photoelectric sensors and data processing circuits to detect fan speed, providing a hardware basis for determining whether the silicone oil fan is engaged or disengaged from the engine. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the test system for the engine and fan of this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The first aspect of this utility model provides a testing device for engines and fans, such as... Figure 1 As shown, the system includes a test bench, a control unit, a photoelectric sensor, and a data processing circuit. The control unit is connected to the test bench for controlling the engine, the photoelectric sensor is used to detect the fan speed, and the data processing circuit converts the output signal of the photoelectric sensor into a digital speed signal and transmits it to the test bench.

[0027] Using the above hardware circuit structure, a photoelectric sensor is used to detect the fan speed, and a data processing circuit is used to process and convert the photoelectric sensor signal, providing a hardware foundation for determining whether the silicone oil fan is engaged or disengaged from the engine based on the fan speed during the test.

[0028] The photoelectric sensor outputs an analog duty cycle signal. The data processing circuit converts the photoelectric sensor's output signal into a digital speed signal. There are many ways to implement the data processing circuit; for example, such as... Figure 1As shown, the data processing circuit includes an optocoupler module, a control module, and an AD signal acquisition module connected in sequence. The control module converts the output signal of the photoelectric sensor into an analog speed signal; the optocoupler module couples the control module signal with the photoelectric sensor signal; and the AD signal acquisition module converts the output signal of the control module into a digital signal and transmits it to the test bench.

[0029] Since photoelectric sensors and control modules typically operate at different voltages, optocoupler modules are used for signal transmission.

[0030] Based on any of the above structures, a power supply module is also included for providing operating power to the control module and the photoelectric sensor.

[0031] The photoelectric sensor can be reflective, infrared, fiber optic, etc., with infrared photoelectric sensors being preferred. When using an infrared photoelectric sensor, readily available and mature chips such as ZTPl35S-R, P228, LHl958, LHI954, and RE200B can be used.

[0032] Adopting such Figure 1 The data processing circuit shown can use many existing chips for its control module, such as the STM32 processor and its peripheral circuits.

[0033] The AD signal acquisition module can use chips such as AD7399BRUZ, AD6657ABBCZ, AD9172BBPZ, and AD9364BBCZ, as well as their peripheral circuits.

[0034] The second aspect of this utility model provides an engine and fan testing system, including an engine and fan testing device as described in the first aspect, an engine electrically connected to the engine control unit, and a silicone oil fan connected to the engine.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A testing apparatus for an engine and a fan, comprising a test bench and an engine control unit connected to the test bench for controlling the engine, characterized in that, Also includes: Photoelectric sensor used to detect fan speed; The data processing circuit is used to convert the output signal of the photoelectric sensor into a digital speed signal and transmit it to the test bench.

2. The testing device for an engine and a fan according to claim 1, characterized in that: The data processing circuit includes: A control module for converting the output signal of the photoelectric sensor into an analog speed signal; An optocoupler module for enabling signal coupling between the control module and the photoelectric sensor; The AD signal acquisition module is used to convert the output signal of the control module into a digital signal and transmit it to the test bench.

3. The testing device for an engine and a fan according to claim 2, characterized in that: It also includes a power supply module for providing operating power to the control module and the photoelectric sensor.

4. The testing device for an engine and a fan according to claim 2, characterized in that: The control module is an STM32 processor.

5. The testing apparatus for an engine and a fan according to claim 1, characterized in that: The photoelectric sensor is an infrared photoelectric sensor.

6. A testing system for an engine and a fan, characterized in that: The device includes a test apparatus for an engine and a fan as described in any one of claims 1 to 4, an engine electrically connected to the engine control unit, and a silicone oil fan connected to the engine.

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