Drive axle pressure switch signal detection device

Abstract

The utility model relates to the field of automotive electronics, in particular to a signal detection device for a pressure switch of a drive axle. The device comprises a current sensor, a signal acquisition connector, a conditioning circuit, a data acquisition card, an industrial personal computer, a display screen and a buzzer, the current sensor is connected with a current output interface of the pressure switch through the signal acquisition connector, and the current sensor is connected to the input end of the industrial personal computer through the conditioning circuit and the data acquisition card. And the display screen and the buzzer are connected with the output end of the industrial personal computer. According to the utility model, problems of single function, low efficiency and lack of intelligence of an existing drive axle pressure switch on-off signal detection method can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electronics, in particular to a drive axle pressure switch signal detection device. Background Art

[0002] At present, when a vehicle's wheels slip and cannot drive on a muddy or icy road, the differential lock pressure switch can be activated to make each wheel rotate at a different speed, thereby getting the vehicle out of trouble. However, using the differential lock pressure switch during normal driving will cause damage to the differential, abnormal wear of the tires, and even cause the vehicle to roll over when turning. Therefore, the correct start and stop of the differential lock pressure switch is a very important performance indicator for the entire vehicle.

[0003] There is currently no dedicated rapid detection tool for differential lock pressure switches during production and assembly. The status of the differential lock pressure switch cannot be accurately determined by ordinary on-off circuits, which can easily lead to misjudgment, resulting in defective products entering the market and posing safety hazards to vehicles. At the same time, data cannot be stored, resulting in a lack of data support for product analysis.

[0004] The component that plays a decisive role in the input and output of the differential lock pressure switch signal is the pressure switch. Due to its importance, the pressure switch must be tested before the drive axle assembly is offline. However, existing test devices often directly detect current signals, and the test results rely on manual judgment, which may lead to misjudgment; lack of display components, unable to intuitively display measurement data and results; and lack of intelligent components, unable to record test results and related data. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a drive axle pressure switch signal detection device to solve the problems of single function, low efficiency and lack of intelligence in the current drive axle pressure switch on-off signal detection method.

[0006] In order to solve the technical problem, the technical solution adopted by the utility model is: a drive axle pressure switch signal detection device, including a current sensor, a signal acquisition connector, a conditioning circuit, a data acquisition card, an industrial computer, a display screen and a buzzer. The current sensor is connected to the current output interface of the pressure switch through the signal acquisition connector, and the current sensor is connected to the input end of the industrial computer through the conditioning circuit and the data acquisition card, and the display screen and the buzzer are connected to the output end of the industrial computer.

[0007] Furthermore, it also includes a product barcode identifier, which is connected to the input end of the industrial computer through a Bluetooth module. The product barcode identifier scans the barcode on the drive axle and transmits it to the industrial computer for identification, thereby realizing the association between the barcode and the detection pressure switch.

[0008] Furthermore, the signal acquisition connector is plugged together with the current output interface of the pressure switch for easy use.

[0009] Furthermore, the conditioning circuit filters the current signal collected by the current sensor, and the data acquisition card performs analog-to-digital conversion on the filtered current signal.

[0010] Furthermore, the model of the data acquisition card is NI-9229.

[0011] Furthermore, a storage chip is provided in the industrial computer for storing the detected information for a long time, so as to facilitate later analysis.

[0012] Furthermore, the industrial computer is provided with a USB interface and a printer protocol, and information printing can be performed.

[0013] Beneficial effects of the utility model: Based on an industrial computer and a current sensor, the utility model can detect and display the current value of the drive axle pressure switch structure in real time during the drive axle pressure switch detection process, automatically determine whether the pressure switch is qualified, and realize real-time storage and extraction of the detection results. It is easy to use, improves the efficiency of pressure switch detection, and solves the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a principle block diagram of the utility model;

[0015] In the figure: 1. Pressure switch, 2. Signal acquisition connector, 3. Buzzer, 4. Display screen. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific implementations.

[0017] Example 1

[0018] This embodiment discloses a drive axle pressure switch signal detection device, such as Figure 1 As shown, it includes a current sensor, a product barcode identifier, a signal acquisition connector 2, a conditioning circuit, a data acquisition card, an industrial computer, a display screen 4 and a buzzer 3. The current sensor is connected to the current output interface of the pressure switch 1 through the signal acquisition connector 2, and the current sensor is connected to the input end of the industrial computer through the conditioning circuit and the data acquisition card, and the display screen 4 and the buzzer 3 are connected to the output end of the industrial computer. The product barcode identifier collects the barcode information on the drive bridge and is connected to the input end of the industrial computer through the Bluetooth module.

[0019] In this embodiment, the signal acquisition connector 2 is plugged together with the current output interface of the pressure switch 1 for easy plugging and use. The signal acquisition connector 2 has different models and specifications for different differential lock pressure switches, and the signal acquisition connector 2 is connected to a current sensor.

[0020] In this embodiment, the conditioning circuit filters the current signal collected by the current sensor. The conditioning circuit can be implemented by an existing filtering circuit, and the data acquisition card performs analog-to-digital conversion on the filtered current signal. Specifically, the model of the data acquisition card is NI-9229. The data acquisition card is provided with a plurality of pins, and the data acquisition card is connected to the conditioning circuit and the industrial computer through the pins.

[0021] In this embodiment, a storage chip is provided in the industrial computer for storing the detected information for a long time, so as to facilitate the later analysis and use. The industrial computer is provided with a USB interface and a printer protocol, so that information can be printed.

[0022] The working principle of the device described in this embodiment is as follows: the product barcode identifier scans the drive axle barcode and sends the drive axle related information to the industrial computer. After the scan is completed, the current sensor, the signal acquisition connector 2 and the drive axle pressure switch 1 to be tested are connected in sequence. A certain pressure is filled into the drive axle assembly. Under the action of pressure, the front end pin of the drive axle pressure switch 1 is pushed outward, and the pressure sheet inside the differential lock is pushed outward. At this time, the drive axle pressure switch 1 line is connected, and the drive axle pressure switch 1 has a built-in sliding resistor. The greater the pressure in the drive axle cavity, the greater the current passing through the signal acquisition connector. After the pressure is released, the front end pin of the differential lock pressure switch returns to the normal position, the pressure switch 1 is disconnected inside, and the current disappears. The current sensor detects the current value at the pressure switch structure; the current value is processed by the conditioning circuit and the data acquisition card, and then transmitted to the industrial computer. The industrial computer analyzes and processes the collected signal, and displays the detection data on the display screen 4, and expresses the abnormality of the pressure switch through the buzzer 3. The industrial computer analyzes and processes the collected signals as follows: setting a current threshold and comparing the current value collected by the current sensor with the current threshold. When the current value is higher than the current threshold, it is recorded as the pressure switch is on; when the current value is less than or equal to the current threshold, it is recorded as the pressure switch is off.

[0023] The process of testing the drive axle pressure switch 1 is as follows:

[0024] Apply pressure to the pressure switch 1, and the test result is through. Remove the pressure applied to the pressure switch 1. When the test result is off, the pressure switch 1 is judged to be qualified, and the buzzer 3 lights up green, does not vibrate, and does not beep.

[0025] Apply pressure to pressure switch 1, the test result is through, remove the pressure applied to pressure switch 1, when the test result is through, it is judged that pressure switch 1 is unqualified, buzzer 3 lights up red, vibrates, and beeps. Alternatively, apply pressure to pressure switch 1, the test result is off, it is judged that pressure switch 1 is unqualified, buzzer 3 lights up red, vibrates, and beeps.

[0026] When not testing, the yellow light is displayed, indicating the state of waiting for detection.

[0027] The detection device described in this embodiment has the following characteristics:

[0028] 1. Signal measurement visualization, measurement data and results are displayed on the screen;

[0029] 2. The signal measurement is precise, and the measurement results are directly read by the industrial computer, with accurate data;

[0030] 3. Rapid signal measurement, the measurement data is read by the industrial computer, and the measurement speed is fast;

[0031] 4. The result judgment is automated, and the measurement result is directly judged by the program to avoid manual misjudgment;

[0032] 5. The results are automatically backed up. The program can automatically save various test parameters and can be exported at any time;

[0033] 6. Data recovery: parameter configuration is saved in a separate memory card, and data recovery can be quickly achieved after replacing the industrial computer;

[0034] 7. Data output is convenient. The industrial computer has a variety of data output interfaces, making data export convenient and fast;

[0035] 8. Diversified data storage, capable of storing multiple data such as drive bridge barcode, detection time, current value, detection results, etc. at the same time;

[0036] 9. Data analysis: through the industrial computer, you can view all the saved data, and make statistics and analysis on the data;

[0037] 10. Automatic alarm: when unqualified test parts appear, the system will automatically alarm.

[0038] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

Claims

1. A drive axle pressure switch signal detection device, characterized in that: It includes a current sensor, a signal acquisition connector, a conditioning circuit, a data acquisition card, an industrial computer, a display screen and a buzzer. The current sensor is connected to the current output interface of the pressure switch through the signal acquisition connector, and the current sensor is connected to the input end of the industrial computer through the conditioning circuit and the data acquisition card, and the display screen and the buzzer are connected to the output end of the industrial computer.

2. The drive axle pressure switch signal detection device according to claim 1, characterized in that: It also includes a product barcode identifier, which is connected to the input end of the industrial computer through a Bluetooth module.

3. The drive axle pressure switch signal detection device according to claim 1, characterized in that: The signal acquisition connector is plugged into the current output interface of the pressure switch.

4. The drive axle pressure switch signal detection device according to claim 1, characterized in that: The conditioning circuit filters the current signal collected by the current sensor, and the data acquisition card performs analog-to-digital conversion on the filtered current signal.

5. The drive axle pressure switch signal detection device according to claim 1 or 4, characterized in that: The model of the data acquisition card is NI-9229.

6. The drive axle pressure switch signal detection device according to claim 1, characterized in that: The industrial computer is equipped with a storage chip.

7. The drive axle pressure switch signal detection device according to claim 1, characterized in that: The industrial computer is equipped with a USB interface and a printer protocol.

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