Anti-cheating detection system of loading deceleration working condition method

Abstract

The utility model relates to the technical field of vehicle detection, in particular to an anti-cheating detection system of a loading deceleration working condition method, which is arranged on a chassis dynamometer and comprises a current sensor, a voltage sensor, a rotating speed sensor and a microcontroller. The current sensor is connected with a three-phase power transmission line of the electric turbine, the voltage sensor is electrically connected with a wiring terminal of the electric turbine, and the rotating speed sensor is installed on the inner wall of the rotary drum. The current sensor, the voltage sensor and the rotating speed sensor are electrically connected with the microcontroller, and the microcontroller is in communication connection with the upper control host. Corresponding sensors are respectively arranged on the chassis dynamometers and are in communication connection with the upper control host, so that the reverse dragging current, the reverse dragging voltage and the rotating speed of the rotating drum of the electric turbine can be detected in real time, detection data are compared with a power signal of the upper control host, and the abnormal phenomenon of manually adjusting equipment parameters is effectively identified.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle detection technical field, concretely is a kind of anti-cheating detection system of loading deceleration operating mode. BACKGROUND

[0002] Loading deceleration operating mode is the most popular diesel vehicle exhaust emission detection means in China currently, it uses chassis dynamometer to load deceleration for diesel vehicle running at high speed on the rotating drum, measures the exhaust condition under different driving vehicle full load power.However, many detection institutions artificially adjust detection equipment parameters to improve the qualified rate of vehicle exhaust emission detection in order to let vehicle with excessive emission pass through workshop smoothly, the most common is to reduce the excitation current of the eddy current machine of chassis dynamometer, so that the data detection index of vehicle reverse drag is normal when vehicle is measured by loading deceleration operating mode.This cheating behavior not only violates the fairness principle of detection, but also causes potential threat to the environment because unqualified vehicle emission increases air pollution. SUMMARY

[0003] To solve the above problems, the utility model provides an anti-cheating detection system of loading deceleration operating mode, which is arranged on a chassis dynamometer, the chassis dynamometer comprises a rotating drum, an eddy current turbine and an upper control host, characterized in that the anti-cheating detection system comprises a current sensor, a voltage sensor, a rotating speed sensor and a microcontroller; the current sensor is connected to the three-phase power transmission line of the eddy current turbine, the voltage sensor is electrically connected to the wiring terminal of the eddy current turbine, and the rotating speed sensor is installed on the inner wall of the rotating drum; the current sensor, the voltage sensor and the rotating speed sensor are electrically connected to the microcontroller, and the microcontroller is in communication connection with the upper control host.

[0004] In order to realize the storage and processing of the detection signals of each sensor, the microcontroller comprises a processor unit, an isolation filter circuit, an analog-digital conversion module, a wireless communication module and a storage module, the isolation filter circuit is electrically connected to the analog-digital conversion module, and the microcontroller is electrically connected to the analog-digital conversion module, the wireless communication module and the storage module.

[0005] In order to realize voltage detection of the eddy current turbine, the voltage sensor comprises a voltage detection terminal and a voltage detection circuit, and the voltage detection terminal is electrically connected to the voltage detection circuit; the voltage detection circuit comprises a resistor R1, a resistor R2 and an operational amplifier U1, the resistor R1 and the resistor R2 are connected in series to divide voltage, the positive input end of the operational amplifier U1 is connected to the series connection node of the resistor R1 and the resistor R2, and the reverse input end of the operational amplifier U1 is connected to the output end thereof.

[0006] In the specific embodiment, the current sensor adopts a clamp-type current sensor.

[0007] The isolation filter circuit consists of a resistor R4 and capacitors C1 and C2 connected together. One end of the resistor R4 is connected to one end of the capacitor C1, and the other end of the resistor R4 is connected to one end of the capacitor C2. The other ends of the capacitors C1 and C2 are grounded.

[0008] To achieve the digital conversion of the detection signals from each sensor, the analog-to-digital converter module is model ADC-LTC2433.

[0009] In a specific implementation, the processor unit model can be STM32F103C8T6.

[0010] In order to provide early warning of abnormal parameters of the chassis dynamometer, the anti-cheating detection system can also be interconnected with the public security network.

[0011] The anti-cheating detection system also includes a display terminal, which is electrically connected to the microcontroller.

[0012] The beneficial effects are as follows: This utility model is an anti-cheating detection system based on the deceleration condition method. By installing corresponding sensors on the chassis dynamometer and communicating with the upper control host, the system can detect the reverse drag current, reverse drag voltage, and drum speed of the electric turbine in real time. It compares the detected data with the power signal from the upper control host, effectively identifying abnormal phenomena such as manual adjustment of equipment parameters by the testing agency, thereby reducing cheating in vehicle exhaust emission testing data. Simultaneously, this anti-cheating detection system can also promptly upload abnormal information for early warning, ensuring the fairness and accuracy of vehicle exhaust emission testing and effectively curbing cheating behavior. Attached Figure Description

[0013] Figure 1 Structural diagram of an anti-cheating detection system based on the deceleration loading method;

[0014] Figure 2 This is a circuit diagram for voltage detection.

[0015] Figure 3 This is a circuit diagram for an isolation filter. Detailed Implementation

[0016] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0017] This embodiment provides an anti-cheating detection system based on a loading and deceleration condition method, which is installed on a chassis dynamometer. The chassis dynamometer includes a drum, an electric turbine, and a host control unit. The drum is used to contact the vehicle tires and rotates in the opposite direction to the vehicle tires. The drum is rotatably connected to the electric turbine, and the rotation of the drum provides torque to the electric turbine in the reverse running state. The host control unit is electrically connected to the electric turbine and is used to transmit power signals to the electric turbine to generate braking torque, thereby achieving a reverse drag effect and simulating the normal resistance of a vehicle when driving on a road.

[0018] To obtain the actual test data of the electric turbine, it is compared with the transmitted power signal from the host control unit, see [reference needed]. Figure 1 The anti-cheating detection system specifically includes a speed sensor, a current sensor, a voltage sensor, and a microcontroller. The current sensor is connected to the three-phase power line of the electric turbine and is used to detect the reverse drag current signal of the electric turbine. The voltage sensor is electrically connected to the terminals of the electric turbine and is used to detect the reverse drag voltage signal of the electric turbine. The speed sensor is installed on the inner wall of the drum and is used to detect and acquire the speed signal. The current sensor, voltage sensor, and speed sensor are each electrically connected to the microcontroller, and the current sensor, voltage sensor, and speed sensor can transmit their respective detection signals to the microcontroller for processing. The microcontroller is also communicatively connected to the upper control host of the chassis dynamometer to acquire the power signal of the upper control host. The microcontroller calculates the reverse drag power of the electric turbine based on the voltage and current detection signals of the current sensor and voltage sensor, and then compares the speed signal and reverse drag power with the power signal transmitted by the upper control host to perform cheating detection.

[0019] To ensure the accuracy of electric turbine current data detection, a clamp-on current sensor is used. By clamping the clamp-on current sensor onto the three-phase transmission line without direct contact with the transmission line, the current detection does not consume the electric turbine current, thus ensuring the accuracy of the detection.

[0020] The voltage sensor includes a wire pressure detection terminal and a voltage detection circuit, and the wire pressure detection terminal is electrically connected to the voltage detection circuit. Figure 2 As shown, the voltage detection circuit includes resistors R1 and R2 and operational amplifier U1. The voltage detection terminal is connected in series with resistors R1 and R2 to divide the voltage. The positive input terminal of operational amplifier U1 is connected to the series node of resistors R1 and R2, and the negative input terminal of operational amplifier U1 is connected to its output terminal. The output terminal of operational amplifier U2 is connected to the microcontroller.

[0021] To store and process the signals detected by each sensor, the microcontroller includes a processor unit, an isolation filter circuit, an analog-to-digital converter module, a wireless communication module, and a storage module. The input terminal of the isolation filter circuit is electrically connected to the signal output terminals of the current sensor and the voltage sensor, respectively. Figure 3 As shown, the isolation filter circuit consists of a resistor R4 and capacitors C1 and C2 connected together. One end of resistor R4 is connected to one end of capacitor C1, and the other end of resistor R4 is connected to one end of capacitor C2. The other ends of capacitors C1 and C2 are grounded. Capacitor C1 is used to isolate AC signals, and the filter circuit composed of resistors R4 and C2 filters noise signals. The isolation filter circuit can filter and isolate the detection signals of the current sensor and voltage sensor, eliminate noise interference in the detection signals, and improve detection accuracy. The output terminal of the isolation filter circuit is electrically connected to the analog-to-digital converter module, and the input terminal of the analog-to-digital converter module is connected to the series node of resistor R4 and capacitor C1, which can digitally convert the isolated and filtered current signal and voltage signal respectively. In addition, the input terminal of the analog-to-digital converter module is also electrically connected to the speed sensor, which can convert the speed signal into a digital signal. The output of the analog-to-digital converter module is electrically connected to the processor unit via serial communication, thereby transmitting the digitally converted signal data to the processor unit. The processor unit is electrically connected to the wireless communication module and the storage module. The storage module is used to store the reverse drag power and speed data processed by the processing unit. The wireless communication module is used to connect to the host control unit to collect the power signal from the host control unit, and the processor unit then performs signal data comparison.

[0022] In a specific implementation, the analog-to-digital conversion module is model ADC-LTC2433; the processor unit model can be STM32F103C8T6.

[0023] After the microcontroller acquires the detection signals from each sensor, it compares them with the data from the host control unit. If the power and speed data of the detection signals do not match the power signal from the host control unit, it indicates that the detection equipment parameters of the host control unit are abnormal. The anti-cheating detection system is interconnected with the public security intranet. The microcontroller uploads the abnormal information through the public security intranet, prompting the public security traffic management department to conduct an on-site inspection of the chassis dynamometer.

[0024] In addition, the anti-cheating detection system also includes a display terminal, which is electrically connected to the microcontroller and is used to receive and display the detection signal power data processed by the microcontroller in real time.

Claims

1. A cheating detection system based on a loading and deceleration condition method, installed on a chassis dynamometer, the chassis dynamometer comprising a drum, an electric turbine, and a host control unit, characterized in that, The anti-cheating detection system includes a current sensor, a voltage sensor, a speed sensor, and a microcontroller; the current sensor is connected to the three-phase power line of the electric turbine, the voltage sensor is electrically connected to the terminal block of the electric turbine, and the speed sensor is installed on the inner wall of the drum; the current sensor, voltage sensor, and speed sensor are each electrically connected to the microcontroller, and the microcontroller is communicatively connected to the host control unit.

2. The anti-cheating detection system based on the loading and deceleration condition method according to claim 1, characterized in that, The microcontroller includes a processor unit, an isolation filter circuit, an analog-to-digital converter module, a wireless communication module, and a storage module. The isolation filter circuit is electrically connected to the analog-to-digital converter module, and the processor unit is electrically connected to the analog-to-digital converter module, the wireless communication module, and the storage module, respectively.

3. The anti-cheating detection system for the loading and deceleration condition method according to claim 1, characterized in that, The voltage sensor includes a pressure detection terminal and a voltage detection circuit. The pressure detection terminal is electrically connected to the voltage detection circuit. The voltage detection circuit includes a resistor R1, a resistor R2, and an operational amplifier U1. The resistors R1 and R2 are connected in series to divide the voltage. The positive input terminal of the operational amplifier U1 is connected to the series node of the resistors R1 and R2, and the negative input terminal of the operational amplifier U1 is connected to its output terminal.

4. The anti-cheating detection system based on the loading and deceleration condition method according to claim 1, characterized in that, The current sensor is a clamp-on current sensor.

5. The anti-cheating detection system for the loading and deceleration condition method according to claim 2, characterized in that, The isolation filter circuit consists of a resistor R4 and capacitors C1 and C2 connected together. One end of the resistor R4 is connected to one end of the capacitor C1, and the other end of the resistor R4 is connected to one end of the capacitor C2. The other ends of the capacitors C1 and C2 are grounded.

6. The anti-cheating detection system for the loading and deceleration condition method according to claim 2, characterized in that, The analog-to-digital converter module is model ADC-LTC2433.

7. The anti-cheating detection system for the loading and deceleration condition method according to claim 2, characterized in that, The processor unit is model STM32F103C8T6.

8. The anti-cheating detection system for the loading and deceleration condition method according to claim 1, characterized in that, The anti-cheating detection system can also be interconnected with the public security intranet.

9. The anti-cheating detection system for the loading and deceleration condition method according to claim 1, characterized in that, It also includes a display terminal, which is electrically connected to the microcontroller.

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