FCU testing device and method

Abstract

The invention provides an FCU testing device and method. The testing device is connected with an FCU to be tested. The testing device and the FCU to be tested are respectively connected with the testing computer; the testing device comprises a load driving module, a switch output module, an analog output module and a PWM output module. Receiving load driving voltage input from the FCU to be tested through a load driving module; a digital signal is input to the FCU to be tested through the switch output module; an analog signal is input to the FCU to be tested through an analog output module; inputting a PWM signal to the to-be-tested FCU through a PWM output module; and reading and displaying a physical value acquired in the FCU to be tested through the test computer. By adopting the FCU function testing method and device, the problems existing in an existing FCU function testing mode can be solved, and therefore the daily testing requirement of the FCU hardware function is met.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware testing, and in particular to an FCU testing device and method. Background Art

[0002] With the support of hydrogen energy industry policies, the market size of the fuel cell industry is increasing. As the control core of the fuel cell, FCU (Fuel Cell Control Unit) is mainly responsible for: collecting various input signals of the fuel cell system, controlling the hydrogen, air and thermal management systems, controlling electrochemical reactions, providing the energy required by the load, and controlling the working status of related components.

[0003] In the EOL stage of FCU hardware production, FCU needs to be tested by FCT (i.e., functional test). FCU FCT test is usually based on HIL (Hardware-in-the-Loop) equipment. However, both FCU and HIL equipment are not only expensive, but also large in size and weight, making them inconvenient to move. In addition, the functions of FCU and HIL equipment are relatively complex, and the development workload in the early stage of testing is large. Therefore, this FCT test method is not suitable for daily testing of FCU hardware functions. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an FCU testing device and method to alleviate the above-mentioned problems existing in the related art, thereby meeting the daily testing needs of the FCU hardware functions.

[0005] In the first aspect, an embodiment of the present invention provides an FCU testing device, which is connected to the FCU to be tested; the testing device and the FCU to be tested are respectively connected to a testing computer; the testing device includes a load driving module, a switch output module, an analog output module and a PWM output module; the load driving module is used to receive a load driving voltage input from the FCU to be tested; the switch output module is used to input a digital signal to the FCU to be tested; the analog output module is used to input an analog signal to the FCU to be tested; the PWM output module is used to input a PWM signal to the FCU to be tested; and the testing computer is used to read and display the physical values ​​collected inside the FCU to be tested.

[0006] In a second aspect, an embodiment of the present invention further provides an FCU testing method, which is applied to the testing device described in the first aspect above; the testing method includes: when testing the load drive of the FCU to be tested, receiving the load drive voltage input from the FCU to be tested through the load drive module; when testing the digital signal reception of the FCU to be tested, inputting the digital signal to the FCU to be tested through the switch output module; when testing the analog signal reception of the FCU to be tested, inputting the analog signal to the FCU to be tested through the analog output module; when testing the PWM signal reception of the FCU to be tested, inputting the PWM signal to the FCU to be tested through the PWM output module; controlling the signal outputs of the testing device and the FCU to be tested respectively through the test computer, and reading and displaying the physical values ​​collected inside the FCU to be tested.

[0007] An FCU test device and method provided by an embodiment of the present invention, the test device is connected to the FCU to be tested; the test device and the FCU to be tested are respectively connected to a test computer; the test device includes a load driving module, a switch output module, an analog output module and a PWM output module; the load driving voltage input from the FCU to be tested is received through the load driving module; the digital signal is input to the FCU to be tested through the switch output module; the analog signal is input to the FCU to be tested through the analog output module; the PWM signal is input to the FCU to be tested through the PWM output module; the physical value collected inside the FCU to be tested is read and displayed by the test computer. By adopting the above technology, the load driving, digital signal reception, analog signal reception and PWM signal reception of the FCU to be tested can be tested by a test device integrated with a load driving module, a switch output module, an analog output module and a PWM output module, and the relevant physical values ​​can be read and displayed by the test computer during the test process, and the test of the relevant functions of the FCU to be tested can be completed based on the hardware structure only. Compared with the method of performing FCU function testing based on HIL equipment, the development workload in the early stage of the test is reduced, and the convenience of FCU testing is improved, which can meet the daily testing needs of FCU hardware functions.

[0008] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0009] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 This is a structural schematic diagram of an FCU testing device in an embodiment of the present invention;

[0012] Figure 2 This is a structural schematic diagram of another FCU testing device in an embodiment of the present invention;

[0013] Figure 3 This is a structural schematic diagram of another FCU testing device in an embodiment of the present invention;

[0014] Figure 4 This is an exemplary diagram of an FCU testing device according to an embodiment of the present invention;

[0015] Figure 5 is a circuit structure diagram of a load driving module according to an embodiment of the present invention;

[0016] Figure 6 1 is a circuit structure diagram of a switch output module according to an embodiment of the present invention;

[0017] Figure 7 This is an example diagram of the working principle of the FCU testing device in an embodiment of the present invention;

[0018] Figure 8 The figure is a flow chart of a FCU testing method in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] At present, the FCT test of FCU is usually carried out based on HIL equipment. However, both FCU and HIL equipment are not only expensive, but also large in size and weight, making them inconvenient to move. In addition, the functions of FCU and HIL equipment are relatively complex, and the development workload in the early stage of testing is large. Therefore, this FCT test method is not suitable for daily testing of FCU hardware functions.

[0021] Based on this, an FCU testing device and method provided by the present invention can alleviate the above-mentioned problems existing in the related technology, thereby meeting the daily testing needs of the FCU hardware functions.

[0022] To facilitate understanding of this embodiment, firstly, a FCU test device disclosed in an embodiment of the present invention is described in detail, see Figure 1 As shown, the test device 100 can be connected to the FCU200 to be tested; the test device 100 and the FCU200 to be tested are respectively connected to the test computer 300; the test device 100 may include a load driving module 101, a switch output module 102, an analog output module 103 and a PWM output module 104; the load driving module 101 can be used to receive a load driving voltage input from the FCU200 to be tested; the switch output module 102 can be used to input a digital signal to the FCU200 to be tested; the analog output module 103 is used to input an analog signal to the FCU200 to be tested; the PWM output module 104 can be used to input a PWM signal to the FCU200 to be tested; and the test computer 300 can be used to read and display the physical values ​​collected inside the FCU200 to be tested.

[0023] An FCU test device provided by an embodiment of the present invention receives a load drive voltage input from a FCU to be tested through a load drive module; inputs a digital signal to the FCU to be tested through a switch output module; inputs an analog signal to the FCU to be tested through an analog output module; inputs a PWM signal to the FCU to be tested through a PWM output module; and controls the signal outputs of the test device and the FCU to be tested respectively through a test computer, and displays the physical values ​​collected inside the FCU to be tested. By adopting the above technology, the load drive, digital signal reception, analog signal reception, and PWM signal reception of the FCU to be tested can be tested through a test device integrated with a load drive module, a switch output module, an analog output module, and a PWM output module, and the relevant physical values ​​can be read and displayed through the test computer during the test process. The test of the relevant functions of the FCU to be tested can be completed based on the hardware structure only. Compared with the method of performing FCU function testing based on HIL equipment, the development workload in the early stage of the test is reduced, and the convenience of FCU testing is improved, which can meet the daily testing needs of FCU hardware functions.

[0024] As a possible implementation, see Figure 2As shown, the test device 100 can be connected to the first junction box 400 through a wiring harness, the FCU to be tested can be connected to the second junction box 500 through a wiring harness, and the first junction box 400 can be connected to the second junction box 500 through a jumper; there is a first mapping relationship between the port of the test device 100 and the port of the first junction box 400, there is a second mapping relationship between the port of the first junction box 400 and the port of the second junction box 500, and there is a third mapping relationship between the port of the second junction box 500 and the port of the FCU 200 to be tested.

[0025] As a possible implementation, see Figure 1 and Figure 2 As shown, the load driving module 101 can be connected to the driving output port of the FCU200 to be tested; the load driving module 101 can include at least one driving channel, each driving channel is used to drive the corresponding load; each driving channel supports controlling the switching of low-side driving and high-side driving through the first switching circuit and configuring the load driving voltage range through the first voltage configuration circuit; the first switching circuit may include a first switch for controlling the corresponding driving channel to switch between low-side driving and high-side driving; the first voltage configuration circuit may include a second switch for configuring the load driving voltage range of the corresponding driving channel from at least two preset load driving voltage ranges; the test computer 300 can also be used to control whether the corresponding channel of each driving channel corresponding to the driving output port is driven.

[0026] Among them, when testing the load drive of the FCU200 to be tested, the working state of the driven load can be used to characterize whether the load drive voltage output of the FCU200 to be tested is normal; the load can include at least one of the following: a current limiting resistor and a light emitting diode connected in series, a solenoid valve, a fan, and a relay.

[0027] Exemplarily, each driving channel of the load driving module 101 can be controlled by the test computer 300 to determine whether the corresponding path of the driving output port is driven, and the corresponding load driving voltage range can be configured for each driving channel of the load driving module 101 by the second switch of the first voltage configuration circuit; when testing the load driving of the FCU200 to be tested, the FCU200 to be tested can output the corresponding load driving voltage according to the load driving voltage range configured by the corresponding driving channel from the designated path of the driving output port to drive the corresponding load through the driving output port of the FCU to be tested, and the tester can intuitively judge whether the load driving voltage output of the FCU200 to be tested is normal according to the working state of the load. With this operation mode, when testing the load driving of the FCU200 to be tested, the relevant personnel can intuitively judge whether the load driving voltage output of the FCU200 to be tested is normal only according to the working state of the driven load, thereby improving the intuitiveness and efficiency of the load driving test of the FCU200 to be tested.

[0028] As a possible implementation, see Figure 1 and Figure 2 As shown, the switch output module 102 can be connected to the digital input port of the FCU200 to be tested; the switch output module 102 supports low-level valid and / or high-level valid configuration and configures the switch output voltage range through a second voltage configuration circuit; the second voltage configuration circuit may include a third switch for configuring the switch output voltage range of the switch output module 102 from at least two preset switch output voltage ranges; the test computer 300 can also be used to determine whether the digital signal reception of the FCU200 to be tested is normal based on the digital signal input port status collected inside the FCU200 to be tested and the switch output status of the switch output module 102.

[0029] For example, the switch output module 102 can be configured to be low level effective and / or high level effective first, and the switch output voltage range can be configured for the switch output module 102 through the third switch of the second voltage configuration circuit; when testing the digital signal reception of the FCU200 to be tested, the digital signal can be input to the FCU200 to be tested through the switch output module 102, and then the test computer 300 compares the digital signal input port state of the FCU200 to be tested with the switch output state of the switch output module 102 and determines whether the digital signal reception of the FCU200 to be tested is normal according to the comparison result. With this operation mode, the test computer 300 can automatically determine whether the digital signal reception of the FCU200 to be tested is normal when testing the digital signal reception of the FCU200 to be tested, thereby improving the efficiency and accuracy of the digital signal reception test of the FCU200 to be tested.

[0030] As a possible implementation, see Figure 1 and Figure 2 As shown, the analog output module 103 can be connected to the analog input port of the FCU200 to be tested; the analog output module 103 supports the configuration of the analog output voltage range; the test computer 300 can also be used to determine whether the analog signal reception of the FCU200 to be tested is normal based on the physical value of the analog signal collected inside the FCU200 to be tested and the voltage value output by the analog output module 103.

[0031] For example, the analog output voltage range can be configured for the analog output module 103 first; when testing the analog signal reception of the FCU200 to be tested, the analog signal can be input to the FCU200 to be tested through the analog output module 103, and then the physical value of the analog signal collected inside the FCU200 to be tested and the voltage value output by the analog output module 103 can be compared by the test computer 300, and whether the analog signal reception of the FCU200 to be tested is normal can be determined according to the comparison result. With this operation mode, when testing the analog signal reception of the FCU200 to be tested, the test computer 300 can automatically determine whether the analog signal reception of the FCU200 to be tested is normal, thereby improving the efficiency and accuracy of the analog signal reception test of the FCU200 to be tested.

[0032] As a possible implementation, see Figure 1 and Figure 2 As shown, the PWM output module 104 can be connected to the PWM input port of the FCU200 to be tested; the PWM output module 104 supports the configuration of PWM signal output parameters; the test computer 300 can also be used to configure the PWM signal output parameters for the PWM output module 104, and determine whether the PWM signal reception of the FCU200 to be tested is normal based on the amplitude and frequency of the PWM signal collected inside the FCU200 to be tested.

[0033] For example, the PWM signal output parameters (such as the amplitude and frequency of the PWM signal) can be configured for the PWM output module 104 through the test computer 300; when testing the PWM signal reception of the FCU 200 to be tested, the PWM output module 104 can be controlled by the test computer 300 to input the PWM signal to the FCU 200 to be tested, and then the amplitude and frequency of the PWM signal collected inside the FCU 200 to be tested can be obtained through the test computer 300, and whether the PWM signal reception of the FCU 200 to be tested is normal can be determined based on the obtained amplitude and frequency. With this operation mode, the test computer 300 can automatically determine whether the PWM signal reception of the FCU 200 to be tested is normal when testing the PWM signal reception of the FCU 200 to be tested, thereby improving the efficiency and accuracy of the PWM signal reception test of the FCU 200 to be tested.

[0034] As a possible implementation, see Figure 2As shown, the test device 100 may further include a power module 105 , which may convert the mains power into 5V, 12V or 24V direct current to power the test device 100 and the FCU 200 to be tested.

[0035] As a possible implementation, see Figure 3 As shown, the test device 100 can be connected to the FCU200 to be tested through a wiring harness. It is only necessary to establish a mapping relationship between the port of the test device 100 and the port of the FCU200 to be tested, and the test device 100 can be used to perform relevant functional tests on the FCU200 to be tested, which saves the use of the above-mentioned first junction box 400 and the above-mentioned second junction box 500, and there is no need to establish a mapping relationship between the port of the test device 100 and the port of the above-mentioned first junction box 400, between the port of the above-mentioned first junction box 400 and the port of the above-mentioned second junction box 500, and between the port of the above-mentioned second junction box 500 and the port of the FCU200 to be tested, thereby reducing the workload of hardware installation and wiring in the early stage of testing.

[0036] For ease of understanding, the structure and working principle of the above-mentioned testing device are described as follows by taking a specific application as an example.

[0037] See also Figure 4 As shown, the test device 100 integrates a power supply module 105 (which can convert 220V AC power into 5V, 12V or 24V DC power and provide it to the test device 100 and the FCU to be tested), a load driving module 101 with 45 driving channels, a switch output module 102 supporting 36 switch outputs, an analog output module 103 supporting 27 analog outputs, a PWM output module 104 supporting 18 PWM outputs, a communication module 106 supporting 4 communication signals, etc.; the test device 100 is connected to the PC host computer 301 via RS232, and the PWM control quantity of the test device 100 can be displayed and controlled by the PC host computer 301.

[0038] To increase the flexibility of the test interface, see Figure 4 As shown, two disconnection junction boxes (i.e., BOB junction box A and BOB junction box B) of the same model can be added between the test device 100 and the FCU200 to be tested; the test device 100 is connected to the BOB junction box A through a wiring harness, and the number of pins of the BOB junction box A should be greater than or equal to the number of measured interfaces of the test device 100; the FCU200 to be tested is connected to the BOB junction box B through a wiring harness, and the number of pins of the BOB junction box B should be greater than or equal to the number of measured pins of the FCU200 to be tested; the BOB junction box A is connected to the BOB junction box B through a jumper; the BOB junction box A and the BOB junction box B can flexibly perform on-off, lead-out and measurement operations on the circuit.

[0039] Figure 4 In the test device 100, all inputs, outputs and power supply channels are fixedly connected to BOB junction box A, and a mapping relationship table between the interface of the test device 100 and the interface of BOB junction box A needs to be established; all inputs, outputs and power supply channels of the FCU200 to be tested are fixedly connected to BOB junction box B, and a mapping relationship table between the interface of the FCU200 to be tested and the interface of BOB junction box B needs to be established; and a mapping relationship table between the interface of BOB junction box A and the interface of BOB junction box B needs to be established. By setting BOB junction box A and BOB junction box B to connect related lines, the hardware adaptability of the test device 100 to various types of FCU200 to be tested is improved.

[0040] See also Figure 4 As shown, when testing different FCU200 to be tested, it is necessary to re-customize and establish the interface mapping connection relationship between the test device 100 and the BOB junction box A, between the BOB junction box A and the BOB junction box B, and between the BOB junction box B and the FCU200 to be tested; the FCU200 to be tested is connected to the PC host computer 301 via CAN, and the PC host computer 301 can be used to control whether each drive output port of the FCU200 to be tested outputs a drive signal, and the physical values ​​collected in the FCU200 to be tested and the state and physical value of the drive signal output by the FCU200 to be tested are read through the PC host computer 301, and the physical values ​​collected in the FCU200 to be tested and the state and physical value of the drive signal output by the FCU200 to be tested can also be displayed through the PC host computer 301.

[0041] See also Figure 5 As shown above Figure 4 In the test device 100 shown, each port of the load driving module 101 (corresponding to the corresponding driving channel) is mapped to the BOB junction box A and connected to the BOB junction box B through a jumper and then mapped to the corresponding driving output port of the FCU 200 to be tested. Each driving channel includes a low-side driving branch and a high-side driving branch switched by a single-pole double-throw switch S2, and each low-side driving branch and high-side driving branch of each driving channel each include a series current limiting resistor (i.e. Figure 5 R2 on the low-side drive branch and R4 on the high-side drive branch) and the light-emitting diode LED (i.e. Figure 5LSD LED on the low-side drive branch and HSD LED on the high-side drive branch); each drive channel supports a 0-24V load drive voltage range output branch and a 0-5V load drive voltage range output branch switched and configured by a single-pole double-throw switch S1; each drive channel is provided with resistors R1 and R3, one end of R2 is connected to the LSD LED, the other end of R2 and one end of R1 are respectively connected to an output end of S2, the other end of R1 is connected to the input end of S1, one end of R4 is connected to the HSD LED, the other end of R4 and one end of R3 are respectively connected to another output end of S2, and the other end of R3 is grounded; the two output ends of S1 are respectively connected to the 0-24V load drive voltage range output and the 0-5V load drive voltage range output; the input end of S2 is connected to the corresponding interface of the BOB junction box A, and is connected to the corresponding interface of the BOB junction box B through a jumper, and then connected to the corresponding drive output port of the FCU to be tested. When testing the load drive of the FCU200 to be tested, the corresponding load drive voltage range output branch can be turned on through the output end of S1, and the corresponding low-side drive branch or high-side drive branch can be turned on through the output end of S2, and then the corresponding load drive voltage is output to the corresponding road drive channel of the load drive module 101 in a low-side drive mode or a high-side drive mode according to the corresponding configured load drive voltage range (0-5V or 0-24V) through the measured drive output port of the FCU200 to be tested to drive the corresponding load (i.e., the current limiting resistor and the light-emitting diode LED connected in series on the low-side drive branch or the high-side drive branch) to work. The tester can make a qualitative judgment based on the working status of the light-emitting diode LED (such as whether it is on or off, flashing frequency, etc.) to determine whether the load drive voltage output function of the test device 100 is normal.

[0042] See also Figure 6 As shown above Figure 4In the test device 100 shown, each switch output port SO of the switch output module 102 is mapped to the BOB junction box A and connected to the BOB junction box B through a jumper and then mapped to the corresponding digital input port of the FCU 200 to be tested. Each switch output port of the switch output module 102 supports the 0-24V switch output voltage range branch, the 0-12V switch output voltage range branch, the 0-5V switch output voltage range branch and the grounding branch configured by switching through the switch S3; the four input terminals of S3 are respectively connected to the 0-24V switch output voltage range, the 0-12V switch output voltage range, the 0-5V switch output voltage range and the ground wire; the output terminal of S3 is connected to the corresponding interface of the BOB junction box A, and is connected to the corresponding interface of the BOB junction box B through a jumper, and then connected to the corresponding digital input port of the FCU to be tested. When testing the digital signal reception of the FCU200 to be tested, the low level valid and / or high level valid of the switch output module 102 can be configured first, and the corresponding switch output voltage range branch is turned on through the input end of S3, and then the corresponding switch output port of the switch output module 102 outputs the corresponding switch output voltage to the corresponding measured digital input port of the FCU200 to be tested according to the corresponding configured switch output voltage range (0-5V or 0-12V or 0-24V). The PC host computer 301 receives the signal status of the measured digital input port uploaded by the FCU200 to be tested through CAN and compares the received signal status with the switch output status of the switch output module 102 to determine whether the digital signal receiving function of the FCU200 to be tested is normal.

[0043] Above Figure 4 In the test device 100 shown, each analog output port AO of the analog output module 103 is mapped to the BOB junction box A and connected to the BOB junction box B through a jumper and then mapped to the corresponding analog input port of the FCU200 to be tested. Each analog output port of the analog output module 103 supports the configuration of the analog output voltage range. When testing the analog signal reception of the FCU200 to be tested, the analog output voltage range of the analog output module 103 can be configured first, and then the corresponding analog output port of the analog output module 103 outputs the corresponding analog output voltage to the corresponding measured analog input port of the FCU200 to be tested according to the corresponding configured analog output voltage range. The PC host computer 301 reads the physical value of the analog signal received inside the FCU200 to be tested through CAN, and compares the received physical value of the analog signal with the voltage value output by the analog output module 103 to determine whether the analog signal receiving function of the FCU200 to be tested is normal.

[0044] Above Figure 4In the test device 100 shown, each PWM output port of the PWM output module 104 is mapped to the BOB junction box A and connected to the BOB junction box B through a jumper and then mapped to the corresponding PWM input port of the FCU200 to be tested. Each PWM output port of the PWM output module 104 supports the configuration of PWM control quantity (such as the amplitude and frequency of the PWM signal), and the PWM control quantity of each PWM output port of the PWM output module 104 can be set in advance through the PC host computer 301. When testing the PWM signal reception of the FCU200 to be tested, the corresponding PWM signal can be output to the corresponding measured PWM input port of the FCU200 to be tested according to the corresponding set PWM control quantity through the corresponding PWM output port of the PWM output module 104, and the PC host computer 301 reads the amplitude and frequency of the frequency signal (i.e., PWM signal) received inside the FCU200 to be tested through CAN to determine whether the PWM signal receiving function of the FCU200 to be tested is normal.

[0045] Above Figure 4 In the test device 100 shown, the power module 105 can convert 220V AC power into 5V, 12V or 24V DC power, thereby powering the test device 100 and the FCU 200 to be tested through the BOB junction box A and the BOB junction box B in turn.

[0046] In addition, the above Figure 4 In the test device 100 shown, the series current limiting resistor and light emitting diode LED contained in the low-side drive branch and the high-side drive branch of each drive channel of the load drive module 101 can also be replaced as a whole with a physical load (such as a solenoid valve, a fan, a relay, etc.). When testing the load drive of the FCU 200 to be tested, the tester can judge whether the load drive voltage output function of the test device 100 is normal according to the working state of the physical load (such as the on and off of the solenoid valve, the speed of the fan, the on and off of the relay, etc.). The switch output module 102 can also be set to a physical switch (such as a paddle switch, a knob switch, etc.), a physical sensor (such as a position sensor, a resistive sensor, etc.), etc. Corresponding switch components can also be set in the switch output module 102 and the analog output module 103, so as to facilitate the configuration of the low level effective and / or high level effective of the switch output module 102 and the analog output voltage range of the analog output module 103 through the switch components, thereby improving the convenience of related parameter configuration. Figure 4 The test device 100 shown may also be integrated with a PWM input detection module, which may be provided with an LED light, so that the test device 100 may be used to test the PWM signal output function of the FCU 200 to be tested, and the tester may determine whether the PWM signal output function of the FCU 200 to be tested is normal based on the working state of the LED light of the PWM input detection module.

[0047] See also Figure 7 As shown, using the above Figure 4 The operation mode of the test device 100 shown in the figure for performing relevant functional tests on the FCU 200 to be tested is mainly carried out according to the following process:

[0048] Step S1, sorting out the interface mapping relationship between the test device and the BOB junction box A.

[0049] Step S2, sorting out the interface mapping relationship between the FCU to be tested and the BOB junction box B.

[0050] Step S3: sort out the interface mapping relationship between BOB junction box A and BOB junction box B.

[0051] Step S4, presetting the interface configuration of the test device and the FCU to be tested according to the interface properties of the FCU to be tested.

[0052] Step S5, connecting the test device, BOB junction box A, BOB junction box B, the FCU to be tested and the PC host computer.

[0053] Step S6, executing relevant functional tests of the FCU to be tested.

[0054] Step S7, using the PC host computer to read the test data of the FCU to be tested, and perform comparative analysis on the test results.

[0055] The above-mentioned test device has the advantages of convenient operation, wide application, high integration and controllable cost. Using the above-mentioned test device to test FCU related functions can meet the daily testing needs of FCU hardware functions.

[0056] Based on the above test device, the embodiment of the present invention also provides a FCU test method, which can be applied to the above test device; see Figure 8 As shown, the test method may include the following steps:

[0057] Step S802, when testing the load drive of the FCU to be tested, receiving a load drive voltage input from the FCU to be tested through a load drive module.

[0058] Step S804: When testing the digital signal reception of the FCU to be tested, a digital signal is input to the FCU to be tested through the switch output module.

[0059] Step S806, when testing the analog signal reception of the FCU to be tested, input the analog signal to the FCU to be tested through the analog output module.

[0060] Step S808, when testing the PWM signal reception of the FCU to be tested, input the PWM signal to the FCU to be tested through the PWM output module.

[0061] Step S810: read and display the physical values ​​collected inside the FCU to be tested through the test computer.

[0062] The above-mentioned test method may also include: controlling the corresponding drive channel to switch between low-side drive and high-side drive through a first switch, and configuring the load drive voltage range of the corresponding drive channel from at least two preset load drive voltage ranges through a second switch; controlling whether the corresponding path of each drive channel corresponding to the drive output port is driven through a test computer.

[0063] The above-mentioned test method may also include: configuring the switch output module to be low level valid and / or high level valid, and configuring the switch output voltage range for the switch output module from at least two preset switch output voltage ranges through a third switch; judging whether the digital signal reception of the FCU to be tested is normal based on the state of the digital signal input port collected inside the FCU to be tested and the switch output state of the switch output module through the test computer.

[0064] The above-mentioned test method may also include: configuring an analog output voltage range for the analog output module; judging whether the analog signal reception of the FCU to be tested is normal by the test computer according to the physical value of the analog signal collected inside the FCU to be tested and the voltage value output by the analog output module.

[0065] The above-mentioned test method may also include: configuring PWM signal output parameters for the PWM output module through a test computer, and judging whether the PWM signal reception of the FCU to be tested is normal according to the amplitude and frequency of the PWM signal collected inside the FCU to be tested.

[0066] The above-mentioned test method may further include: converting the mains power into 5V, 12V or 24V direct current through a power module to power the test device and the FCU to be tested.

[0067] The FCU testing method provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned FCU testing device embodiment. For the sake of brief description, for matters not mentioned in the testing method embodiment, reference may be made to the corresponding contents in the aforementioned testing device embodiment.

[0068] Unless otherwise specifically stated, the relative steps, numerical expressions and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0069] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0070] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0071] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An FCU testing device, characterized in that: The test device is connected to the FCU to be tested; the test device and the FCU to be tested are respectively connected to a test computer; the test device includes a load driving module, a switch output module, an analog output module and a PWM output module; the load driving module is used to receive a load driving voltage input from the FCU to be tested; the switch output module is used to input a digital signal to the FCU to be tested; the analog output module is used to input an analog signal to the FCU to be tested; the PWM output module is used to input a PWM signal to the FCU to be tested; and the test computer is used to read and display the physical values ​​collected inside the FCU to be tested.

2. The testing device according to claim 1, characterized in that: The test device is connected to the first junction box through a wiring harness, the FCU to be tested is connected to the second junction box through a wiring harness, and the first junction box is connected to the second junction box through a jumper; there is a first mapping relationship between the port of the test device and the port of the first junction box, there is a second mapping relationship between the port of the first junction box and the port of the second junction box, and there is a third mapping relationship between the port of the second junction box and the port of the FCU to be tested.

3. The testing device according to claim 1, characterized in that: The load driving module is connected to the driving output port of the FCU to be tested; the load driving module includes at least one driving channel, each driving channel is used to drive the corresponding load; each driving channel supports controlling the switching of low-side driving and high-side driving through a first switching circuit and configuring the load driving voltage range through a first voltage configuration circuit; the first switching circuit includes a first switch, which is used to control the switching of the corresponding driving channel between low-side driving and high-side driving; the first voltage configuration circuit includes a second switch, which is used to configure the load driving voltage range of the corresponding driving channel from at least two preset load driving voltage ranges; the test computer is also used to control whether the corresponding channel of each driving channel corresponding to the driving output port is driven.

4. The testing device according to claim 3, characterized in that: When testing the load drive of the FCU to be tested, the working state of the driven load is used to characterize whether the load drive voltage output of the FCU to be tested is normal; the load includes at least one of the following: a current limiting resistor and a light emitting diode connected in series, a solenoid valve, a fan, and a relay.

5. The testing device according to claim 1, characterized in that: The switch output module is connected to the digital input port of the FCU to be tested; the switch output module supports low-level valid and / or high-level valid configuration and configures the switch output voltage range through a second voltage configuration circuit; the second voltage configuration circuit includes a third switch, which is used to configure the switch output voltage range of the switch output module from at least two preset switch output voltage ranges; the test computer is also used to determine whether the digital signal reception of the FCU to be tested is normal based on the state of the digital signal input port collected inside the FCU to be tested and the switch output state of the switch output module.

6. The testing device according to claim 1, characterized in that: The analog output module is connected to the analog input port of the FCU to be tested; the analog output module supports the configuration of the analog output voltage range; the test computer is also used to determine whether the analog signal reception of the FCU to be tested is normal based on the physical value of the analog signal collected inside the FCU to be tested and the voltage value output by the analog output module.

7. The testing device according to claim 1, characterized in that: The PWM output module is connected to the PWM input port of the FCU to be tested; the PWM output module supports the configuration of PWM signal output parameters; the test computer is also used to configure the PWM signal output parameters for the PWM output module, and to determine whether the PWM signal reception of the FCU to be tested is normal based on the amplitude and frequency of the PWM signal collected inside the FCU to be tested.

8. The testing device according to claim 1, characterized in that: The test device also includes a power supply module for converting the mains power into 5V, 12V or 24V direct current to power the test device and the FCU to be tested.

9. The testing device according to claim 1, characterized in that: The test device is connected to the FCU to be tested via a wiring harness.

10. A FCU testing method, characterized in that: The test method is applied to the test device according to any one of claims 1 to 9; the test method comprises: When testing the load drive of the FCU to be tested, a load drive voltage input from the FCU to be tested is received through the load drive module; When testing the digital signal reception of the FCU to be tested, a digital signal is input to the FCU to be tested through the switch output module; When testing the analog signal reception of the FCU to be tested, an analog signal is input to the FCU to be tested through the analog output module; When testing the PWM signal reception of the FCU to be tested, the PWM output module is controlled by the test computer to input the PWM signal to the FCU to be tested; The physical values ​​collected inside the FCU to be tested are read and displayed by the test computer.

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