Oxygen sensor testing device and system

Abstract

The oxygen sensor testing device comprises a control box and a constant-temperature pressure testing box, a control box testing circuit is arranged in the control box, and an air pressure testing circuit is arranged in the constant-temperature pressure testing box; the control box test circuit comprises a power supply conditioning circuit, a vibration test circuit, a transient test circuit and a single-chip microcomputer development board. The power supply conditioning circuit is used for being connected with a workshop for power supply. The vibration test circuit is used for testing detection data of the oxygen sensor in a vibration environment, and the transient test circuit is used for switching a pin combination for connecting the oxygen sensor in a test process and testing the insulativity of the oxygen sensor under transient voltage; the air pressure test circuit is used for testing detection data of the oxygen sensor under different temperature and pressure combination conditions, and the temperature and air pressure in the constant-temperature pressure test box are fed back and regulated through the air pressure test circuit; according to the invention, the detection conditions of the oxygen sensor under vibration, non-vibration and different gas supply conditions can be tested in real time, and the test efficiency of the oxygen sensor is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oxygen sensor testing and relates to an oxygen sensor testing device and system. Background Art

[0002] The oxygen sensor is a device used to detect data such as oxygen concentration and oxygen pressure. The oxygen sensor is affected by the external environment, which will affect the detection accuracy of the oxygen sensor. In order to ensure the accuracy of the detection data of the oxygen sensor, the oxygen sensor needs to be tested. In the prior art, it is usually necessary to set up and connect detection equipment separately for different detection requirements of oxygen sensors. For example, when it is necessary to test the oxygen concentration of an oxygen sensor, it is necessary to set up a calibrated oxygen concentration sensor for additional comparison. When it is necessary to test the pressure of the oxygen sensor, it is necessary to set up an additional pressure sensor for comparison. When it is necessary to test the detection data of the oxygen sensor in different temperature environments, it is necessary to place the oxygen sensor in different temperature environments. This results in the cumbersome testing process of oxygen sensors in the prior art, low detection efficiency, and difficulty in uniformly testing the test items required for the oxygen sensor at one time.

[0003] In view of the above technical problems existing in the prior art, the present invention discloses an oxygen sensor testing device and system. Summary of the invention

[0004] The purpose of the present invention is to provide an oxygen sensor testing device and system, which can perform real-time testing on the detection conditions of the oxygen sensor under vibration, non-vibration and different gas supply conditions, thereby improving the testing efficiency of the oxygen sensor.

[0005] The present invention is achieved through the following technical solutions: An oxygen sensor testing device comprises a control box and a constant temperature and pressure testing box, wherein a control box testing circuit is arranged inside the control box, and an air pressure testing circuit is arranged inside the constant temperature and pressure testing box; the control box testing circuit comprises a power conditioning circuit, a vibration test circuit, a transient test circuit, and a single-chip microcomputer development board, wherein the vibration test circuit and the transient test circuit are both connected to the single-chip microcomputer development board, the power conditioning circuit is used to connect to the workshop power supply and condition the workshop power supply into a direct current power supply and input it into the vibration test circuit and the transient test circuit; the vibration test circuit is used to test the detection data of the oxygen sensor in a vibration environment, the transient test circuit is used to switch the pin combination of the oxygen sensor connected during the test process, and test the insulation of the oxygen sensor under transient voltage; the air pressure testing circuit is used to test the detection data of the oxygen sensor under different temperature and pressure combinations, and to feedback and regulate the temperature and air pressure inside the constant temperature and pressure testing box through the air pressure testing circuit.

[0006] The power conditioning circuit is used to connect the workshop power supply and convert the workshop power supply into a DC power supply suitable for testing external devices and oxygen sensor test devices. The transient test circuit is used to perform transient voltage tests on oxygen sensors. It can switch the pins of the oxygen sensor access circuit and measure the insulation of different oxygen sensor pins under transient voltage. The vibration test circuit is used to test the flow rate and oxygen concentration data detected by the oxygen sensor in an external vibration environment, and send the detection data to the single-chip microcomputer development board for real-time display. The air pressure test circuit is used to test the flow rate and oxygen concentration data detected by the oxygen sensor in a non-vibration environment, and send the detection data to the single-chip microcomputer development board for real-time display.

[0007] In order to better implement the present invention, further, the transient test circuit includes an interface J1, a pin switching switch S2, a one-bit two-value conversion circuit, and a transient power supply M6. The interface J1 is connected to the transient power supply M6 and the one-bit two-value conversion circuit through the pin switching switch S2, and the one-bit two-value conversion circuit is connected to the single-chip microcomputer development board.

[0008] In order to better implement the present invention, further, a detection interface X5 and a detection interface X6 are provided on the loop where the pin switching switch S2 is located.

[0009] In order to better implement the present invention, further, the power conditioning circuit includes an interface J3, a switch S1, a CNC DC power supply M2A, and an equipment instrument DC power supply M3A. The interface J3 is connected to the CNC DC power supply M2A on the first power supply branch and the equipment instrument DC power supply M3A on the second power supply branch through the switch S1; the CNC DC power supply M2A is used to provide an 18-32V adjustable DC power supply, and the equipment instrument DC power supply M3A is used to provide a 5V power supply.

[0010] In order to better implement the present invention, further, the output end of the equipment instrument DC power supply M3A is provided with a first branch and a second branch in parallel, the first branch is provided with a first ammeter M4, and the second branch is provided with a second ammeter M5; the first branch is provided with a detection interface X1 and a detection interface X2, and the second branch is provided with a detection interface X3 and a detection interface X4.

[0011] In order to better implement the present invention, further, the vibration test circuit includes an interface J2 and an interface CZ1, and the digital control DC power supply M2A, the equipment instrument DC power supply M3A, and the single-chip microcomputer development board are connected between the interface J2 and the interface CZ1.

[0012] In order to better implement the present invention, further, the air pressure test circuit includes interface PK3, interface CT2, and interface CT3. The interface PK3 is connected to the single-chip microcomputer development board through interface CZ1, and the interface CT2 and interface CT3 are connected to the single-chip microcomputer development board respectively.

[0013] In order to better implement the present invention, further, the air pressure test circuit also includes a hot and cold plate interface CT4 and a fan. The hot and cold plate interface CT4 is connected to the single-chip microcomputer development board, and the fan is connected to the interface CZ1.

[0014] An oxygen sensor test system is implemented based on an oxygen sensor test device, comprising a safety insulation tester, a constant temperature box, a vibration test device, and a plug XT1. The safety insulation tester is connected to a transient test circuit in the oxygen sensor test device, the constant temperature box and the vibration test device are connected to the vibration test circuit in the oxygen sensor test device, and the plug XT1 is connected to a power conditioning circuit in the oxygen sensor test device.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention can perform real-time testing on the detection conditions of the oxygen sensor under vibration, non-vibration and different gas supply conditions, and at the same time provides an interface and a switch, so that the staff can conveniently connect various external test equipment and instruments, thereby improving the testing efficiency of the oxygen sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the oxygen sensor test system; Figure 2 This is a schematic diagram of the control box test circuit; Figure 3 is the schematic diagram of the transient test circuit; Figure 4 This is a schematic diagram of the air pressure test circuit. DETAILED DESCRIPTION

[0017] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the present invention explicitly states otherwise, singular forms are also intended to include plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0020] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] Embodiment 1: An oxygen sensor test device of the present embodiment includes a control box and a constant temperature and pressure test box, wherein a control box test circuit is arranged inside the control box, and an air pressure test circuit is arranged inside the constant temperature and pressure test box; the control box test circuit includes a power conditioning circuit, a vibration test circuit, a transient test circuit, and a single-chip microcomputer development board, wherein the vibration test circuit and the transient test circuit are both connected to the single-chip microcomputer development board, the power conditioning circuit is used to connect the workshop power supply and condition the workshop power supply to a DC power supply and input it into the vibration test circuit and the transient test circuit; the vibration test circuit is used to test the detection data of the oxygen sensor in a vibration environment, the transient test circuit is used to switch the pin combination of the oxygen sensor connected during the test process, and test the insulation of the oxygen sensor under transient voltage; the air pressure test circuit is used to test the detection data of the oxygen sensor under different temperature and pressure combinations, and to feedback and regulate the temperature and air pressure inside the constant temperature and pressure test box through the air pressure test circuit.

[0022] The power conditioning circuit is used to connect the workshop power supply and convert the workshop power supply into a DC power supply suitable for testing external devices and oxygen sensor test devices. The transient test circuit is used to perform transient voltage tests on oxygen sensors. It can switch the pins of the oxygen sensor access circuit and measure the insulation of different oxygen sensor pins under transient voltage. The vibration test circuit is used to test the flow rate and oxygen concentration data detected by the oxygen sensor in an external vibration environment, and send the detection data to the single-chip microcomputer development board for real-time display. The air pressure test circuit is used to test the flow rate and oxygen concentration data detected by the oxygen sensor in a non-vibration environment, and send the detection data to the single-chip microcomputer development board for real-time display.

[0023] The control box and the constant temperature pressure test box are provided with a test interface for connecting the oxygen sensor and other test equipment. The constant temperature pressure test box is also provided with an air inlet and an exhaust port. The air inlet includes a high-pressure oxygen inlet, a low-pressure oxygen inlet, and a nitrogen inlet. The workshop air source is connected to the high-pressure oxygen inlet, the low-pressure oxygen inlet, and the nitrogen inlet through an air path, and a pressure regulating valve is provided at the high-pressure oxygen inlet, the low-pressure oxygen inlet, and the nitrogen inlet to adjust the oxygen and nitrogen concentrations and pressures input into the constant temperature pressure test box, so as to create a test environment with different oxygen concentrations and pressures inside the constant temperature pressure test box. A flow switch valve is provided at the exhaust port, which can discharge the gas inside the constant temperature pressure test box at a set flow rate. A display screen is provided on the control box, and the display screen is connected to the single-chip development board to limit the test data of the oxygen sensor, such as the oxygen concentration measured by the oxygen sensor.

[0024] Further, such as Figure 3 As shown, the transient test circuit includes an interface J1, a pin switching switch S2, a one-bit two-value conversion circuit, and a transient power supply M6. The interface J1 is connected to the transient power supply M6 and the one-bit two-value conversion circuit through the pin switching switch S2, and the one-bit two-value conversion circuit is connected to the single-chip microcomputer development board; the detection interface X5 and the detection interface X6 are set on the loop where the pin switching switch S2 is located.

[0025] When performing a transient test, the pins of the oxygen sensor are connected to the interface J1, and the pins of the oxygen sensor connected to the loop can be selected through the switch S2, thereby realizing the transient insulation test between different pins of the oxygen sensor.

[0026] Further, such as Figure 2 As shown, the power conditioning circuit includes an interface J3, a switch S1, a CNC DC power supply M2A, and an equipment instrument DC power supply M3A. The interface J3 is connected to the CNC DC power supply M2A on the first power supply branch and the equipment instrument DC power supply M3A on the second power supply branch through the switch S1; the CNC DC power supply M2A is used to provide an 18-32V adjustable DC power supply, and the equipment instrument DC power supply M3A is used to provide a 5V power supply.

[0027] Interface J3 is connected to the workshop power supply and is used to introduce the workshop 220V AC power supply, and then convert the workshop power supply into an adjustable 18-32V DC power supply through the CNC DC power supply M2A, and convert the workshop power supply into a 5V DC power supply through the equipment instrument DC power supply M3A.

[0028] Further, such as Figure 2As shown, the output end of the equipment instrument DC power supply M3A is provided with a first branch and a second branch in parallel, the first branch is provided with a first ammeter M4, and the second branch is provided with a second ammeter M5; the first branch is provided with a detection interface X1 and a detection interface X2, and the second branch is provided with a detection interface X3 and a detection interface X4. The detection interface X1 and the detection interface X2 are monitoring holes for the oxygen sensor to detect the oxygen concentration and generate current, and the detection interface X3 and the detection interface X4 are monitoring holes for the oxygen sensor to detect the oxygen pressure and generate current.

[0029] Embodiment 2: An oxygen sensor testing device is improved on the basis of Example 1, wherein the vibration test circuit comprises an interface J2 and an interface CZ1, and the numerical control DC power supply M2A, the equipment instrument DC power supply M3A, and the single-chip microcomputer development board are connected between the interface J2 and the interface CZ1.

[0030] like Figure 2 As shown, J2_1 and J2_2 on interface J2 are connected to UUT PA and UUT PB on the microcontroller development board respectively; J2_8 and J2_4 on interface J2 are connected to UUT PH and UUT PD on the microcontroller development board respectively; J2_10 and J2_5 on interface J2 are connected to UUT PK and UUTPE on the microcontroller development board respectively; J2_9 on interface J2 is connected to UUT PJ on the microcontroller development board.

[0031] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0032] Embodiment 3: An oxygen sensor testing device is improved on the basis of embodiment 1 or 2, such as Figure 4 As shown, the air pressure test circuit includes an interface PK3, an interface CT2, and an interface CT3. The interface PK3 is connected to the single-chip microcomputer development board through an interface CZ1, and the interface CT2 and the interface CT3 are connected to the single-chip microcomputer development board respectively. The air pressure test circuit also includes a cold plate interface CT4 and a fan. The cold plate interface CT4 is connected to the single-chip microcomputer development board, and the fan is connected to the interface CZ1.

[0033] like Figure 4 As shown, interface CT2 is used to connect the calibration oxygen concentration sensor, which is used to detect the oxygen concentration inside the constant temperature pressure test box for comparison with the detection data of the oxygen sensor to be tested. The temperature sensor is used to detect the temperature inside the constant temperature pressure test box and transmit the temperature data to the constant temperature pressure test box for display on the display screen. Interface PK3 is used to connect the oxygen sensor.

[0034] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0035] Embodiment 4: An oxygen sensor testing system is implemented based on the oxygen sensor testing device described in any one of embodiments 1-3, such as Figure 1 As shown, it includes a safety insulation tester, a constant temperature box, a vibration test device, and a plug XT1. The safety insulation tester is connected to the transient test circuit in the oxygen sensor test device, the constant temperature box and the vibration test device are connected to the vibration test circuit in the oxygen sensor test device, and the plug XT1 is connected to the power conditioning circuit in the oxygen sensor test device.

[0036] The safety insulation tester is connected to the oxygen sensor through the insulation test cable, and the oxygen sensor is connected to the interface J1 through the transient test cable. The pins connected to the oxygen sensor are switched by the control switch S2 to test the transient insulation between different pins. The thermostat is connected to the CZ1 interface through the performance test cable, the vibration test device is connected to the interface J2 through the vibration test cable, and the plug XT1 is connected to the interface J3 to introduce the workshop power supply.

[0037] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. An oxygen sensor testing device, comprising a control box and a constant temperature and pressure testing box, characterized in that: A control box test circuit is arranged inside the control box, and an air pressure test circuit is arranged inside the constant temperature and pressure test box; the control box test circuit includes a power conditioning circuit, a vibration test circuit, a transient test circuit, and a single-chip microcomputer development board, the vibration test circuit and the transient test circuit are both connected to the single-chip microcomputer development board, the power conditioning circuit is used to connect the workshop power supply and condition the workshop power supply into a DC power supply and input it into the vibration test circuit and the transient test circuit; the vibration test circuit is used to test the detection data of the oxygen sensor in a vibration environment, the transient test circuit is used to switch the pin combination of the oxygen sensor connected during the test process, and test the insulation of the oxygen sensor under transient voltage; the air pressure test circuit is used to test the detection data of the oxygen sensor under different temperature and pressure combinations, and to feedback and regulate the temperature and air pressure inside the constant temperature and pressure test box through the air pressure test circuit.

2. An oxygen sensor testing device according to claim 1, characterized in that: The transient test circuit includes an interface J1, a pin switching switch S2, a one-bit two-value conversion circuit, and a transient power supply M6. The interface J1 is connected to the transient power supply M6 and the one-bit two-value conversion circuit through the pin switching switch S2, and the one-bit two-value conversion circuit is connected to the single-chip microcomputer development board.

3. An oxygen sensor testing device according to claim 2, characterized in that: The loop where the pin switch S2 is located is provided with a detection interface X5 and a detection interface X6.

4. An oxygen sensor testing device according to claim 3, characterized in that: The power conditioning circuit includes an interface J3, a switch S1, a CNC DC power supply M2A, and an equipment instrument DC power supply M3A. The interface J3 is connected to the CNC DC power supply M2A on the first power supply branch and the equipment instrument DC power supply M3A on the second power supply branch through the switch S1; the CNC DC power supply M2A is used to provide an 18-32V adjustable DC power supply, and the equipment instrument DC power supply M3A is used to provide a 5V power supply.

5. An oxygen sensor testing device according to claim 4, characterized in that: The output end of the equipment instrument DC power supply M3A is provided with a first branch and a second branch in parallel, the first branch is provided with a first ammeter M4, and the second branch is provided with a second ammeter M5; the first branch is provided with a detection interface X1 and a detection interface X2, and the second branch is provided with a detection interface X3 and a detection interface X4.

6. An oxygen sensor testing device according to claim 5, characterized in that: The vibration test circuit comprises an interface J2 and an interface CZ1, and the numerical control DC power supply M2A, the equipment instrument DC power supply M3A, and the single-chip microcomputer development board are connected between the interface J2 and the interface CZ1.

7. An oxygen sensor testing device according to claim 6, characterized in that: The air pressure test circuit comprises an interface PK3, an interface CT2 and an interface CT3. The interface PK3 is connected to the single-chip microcomputer development board via an interface CZ1, and the interface CT2 and the interface CT3 are connected to the single-chip microcomputer development board respectively.

8. An oxygen sensor testing device according to claim 7, characterized in that: The air pressure test circuit further includes a hot and cold plate interface CT4 and a fan. The hot and cold plate interface CT4 is connected to the single-chip microcomputer development board, and the fan is connected to the interface CZ1.

9. An oxygen sensor testing system, implemented based on the oxygen sensor testing device according to any one of claims 1 to 8, characterized in that: It includes a safety insulation tester, a constant temperature box, a vibration test device, and a plug XT1. The safety insulation tester is connected to a transient test circuit in an oxygen sensor test device. The constant temperature box and the vibration test device are connected to a vibration test circuit in the oxygen sensor test device. The plug XT1 is connected to a power conditioning circuit in the oxygen sensor test device.

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