CN201173859Y - Vehicle clutch comprehensive performance real vehicle dynamic telemetry device - Google Patents

Abstract

The utility model relates to a real vehicle dynamic telemetry device for comprehensive performance of an automobile clutch, which belongs to the electromechanical category. Its structure is that there is a temperature acquisition sensor between the outer cylinder liner and the transmission shaft, which is a temperature measurement circuit composed of an infrared laser temperature measurement sensor; the speed sensor is a speed measurement circuit composed of a permanent magnet and a Hall sensor; the torque measurement circuit It is to paste strain gauges and resistors on the transmission shaft to form an induction force measurement bridge circuit and a power supply circuit; the signal acquisition and transmission system is connected with the temperature acquisition sensor, the rotational speed sensor and the torque measurement circuit; and the signal acquisition and transmission system is connected with the RFID receiver ; The RFID receiver is connected with the host computer, portable processor, printer and other equipment. The utility model has the advantages of simple structure, convenient use, quickness and agility, and scientifically realizes the real vehicle dynamic telemetry of the comprehensive performance of the vehicle clutch.

Description

Vehicle clutch comprehensive performance real vehicle dynamic telemetry device

technical field

The utility model relates to electromechanical products, in particular to a real vehicle dynamic telemetry device for comprehensive performance of an automobile clutch.

Background technique

As we all know, with the development of society, the automobile industry has developed rapidly. As the clutch in the automobile transmission system is an important part, the automobile relies on the friction and separation between the main and driven parts of the clutch to transmit and cut off the transmission between the engine and the drive axle. power, in order to ensure the reliability and comfort of vehicle handling, so the requirements for its clutch characteristic inspection and reliability inspection are very high; at present, most clutch factories at home and abroad use static detection methods for clutch performance, which can check the cover The various performances of the assembly and the driven disc assembly are tested separately. In recent years, some manufacturers have also developed clutch performance test benches, which simulate the actual working conditions of automobiles to measure clutch performance, including clutch thermal load measurement, static friction torque measurement, sliding friction torque measurement, and clutch friction lining wear resistance measurement. The operating conditions of the clutch bench are quite different from the dynamic working conditions of the real vehicle, especially when the engine and the clutch transmission system are started and stopped, the peak torque may be much greater than the normal working torque. It will cause destructive damage to the clutch, and even make it incapacitated; while the bench test measures the average torque or steady-state torque in the working state, it cannot reflect the actual amplitude and response speed of the dynamic torque, and cannot be used for the clutch when it is working. Therefore, it is urgent to improve the comprehensive performance under the condition of objective and scientific evaluation and measurement.

Utility model content

The purpose of this utility model is to provide a real vehicle dynamic remote measurement device for the comprehensive performance of automobile clutches, which solves the measurement of the friction performance of common clutches under actual working conditions and the torque transmission performance under the temperature rise state. The measurement of characteristic curves such as torque, speed, time to reach synchronization, and temperature rise of the main and driven parts, so that the performance of the clutch can be correctly and scientifically evaluated to ensure the safe and comfortable driving of the car; and the test can be convenient and fast , Accurate requirements.

The technical solution of the utility model is: according to the purpose of the utility model, a real vehicle dynamic telemetry device for the comprehensive performance of the automobile clutch is provided. Due to the different actual vehicle conditions, the device cannot be designed as an integral structure, and must be designed in a block mode. While the car is running at high speed, it is necessary to ensure that the power supply module, signal processing module, signal acquisition module, and signal transmission module are not only fastened between the transmission shaft and the outer casing without damaging the car body structure, but also work in a coordinated manner; specifically The scheme is as follows:

(1) The minimum power design scheme is adopted to ensure the power supply during the actual vehicle test:

In the previous circuit design, the power supply part must have a voltage-stabilizing and current-stabilizing design. The chips used in this device are all low-power military products, so the use of button batteries and voltage-stabilizing chips can meet the needs of the device;

(2) Gapless bonding technology of strain gauges:

A bridge circuit composed of double strain gauges and resistors is used to measure the tiny deformation of the transmission shaft, and the circuit uses an independent power supply; after a lot of experiments and calculations, a patch method of double strain gauges is obtained. The degree angle is the most obvious part of the transmission shaft under force and deformation. The double strain gauges are attached in the axial direction, and the angle between them is 90 degrees, and the signal of the force deformation of the transmission shaft can be accurately obtained; due to the deformation of the steel body It is extremely small, so the requirements for the fit of the strain gauge are very high. It is necessary to ensure the tight fit of the strain gauge and the transmission shaft as much as possible, and minimize the loss of the deformation signal of the steel body;

(3) Portable design of drive shaft jacket:

The jacket is fixed on the transmission shaft with a jacket design, which is convenient for actual vehicle measurement, and the electronic control circuit board is fixed on the jacket of the transmission shaft to meet the requirements of portable and fast and non-destructive installation of the jacket;

(4) The clutch temperature acquisition sensor adopts an infrared laser temperature measurement sensor, which can not only measure the instantaneous temperature of the clutch surface, but also not damage the car body. Temperature measurement of all existing clutches;

(5) The modular design of signal wireless transmission adopts the current mainstream mature technology RFID, through the wireless transmission of data, this technology uses the transmission characteristics of radio frequency signal and space coupling or radar reflection to realize the automatic identification of the identified object, identification Work without manual intervention, can work in various harsh environments, can identify high-speed moving objects and can identify multiple signals at the same time, so the operation is fast and convenient;

(6) Adopt the current mainstream NFORCE module:

The device is used to measure the clutch performance under real vehicle conditions, so it is very important to denoise the data, and the noise processing effect will directly affect the measurement results;

(7) The use of metal strain gauges is a key technology for real-time dynamic torque measurement of clutches;

The torque measurement of this device is limited by the narrow space and harsh electromagnetic environment factors, so the measuring bridge is composed of strain gauges pasted on the transmission shaft. When the transmission shaft is slightly deformed by the torque, the resistance value of the bridge changes, and the strain gauge The change of bridge resistance is transformed into the change of electrical signal to realize the measurement of torque;

(8) The signal processing unit, the A/D conversion unit, the single-chip microcomputer system and the RFID transmitter together constitute the signal acquisition, processing and transmission circuit of the system.

The specific structure of the utility model is: composed of temperature acquisition sensor, rotational speed sensor, torque measurement circuit, external cylinder liner, automobile transmission shaft, signal acquisition and emission system, RFID receiver, computer, portable processor, printer and other components, wherein , there is a temperature acquisition sensor between the outer cylinder liner and the transmission shaft, which is a temperature measurement circuit composed of an infrared laser temperature measurement sensor; the speed sensor is a speed measurement circuit composed of a permanent magnet and a Hall sensor; the torque measurement circuit is in Paste strain gauges and resistors on the transmission shaft to form a torque measurement bridge circuit and a power circuit; the signal acquisition and transmission system is connected with the temperature acquisition sensor, the rotational speed sensor and the torque measurement circuit; and the signal acquisition and transmission system is connected with the RFID receiver; the RFID receiver The device is connected with the host computer, the portable processor and the printer;

When measuring the performance of the clutch, the on-board part of the real vehicle dynamic detection system is installed on the drive shaft between the clutch and the rear axle differential, and the data is sent to the signal processing through the three units of the temperature acquisition sensor, the speed sensor, and the torque measurement circuit The unit, after A/D conversion, sends the signal to the single-chip processing unit, and then through the RFID signal transmitter, the signal is transmitted to the RFID signal receiver, and finally the data are displayed on the computer, portable processor and printer.

The utility model has the advantages of simple structure, convenient, fast and agile use, scientifically realizes the comprehensive performance of the automobile clutch and the real vehicle dynamic telemetry, and ensures the driving safety and comfort of the automobile.

Description of drawings:

Fig. 1 is the structural perspective schematic diagram of the present utility model;

Fig. 2 is a schematic diagram of the distribution of the temperature measurement circuit, rotational speed measurement circuit and induction force measurement circuit on the transmission shaft of the present invention;

Fig. 3 is the schematic diagram of the embodiment of the utility model;

Fig. 4 is the signal flowchart of the present utility model;

Fig. 5 is a software block diagram of the utility model.

Detailed ways:

As shown in the accompanying drawings 1 to 5, the utility model is composed of a temperature acquisition sensor 1, a rotational speed sensor 3, a torque measurement circuit 5, an external cylinder liner 4, an automobile transmission shaft 6, a signal acquisition and emission system 2, an RFID receiver, Computer, portable processing machine, printer are formed, and wherein, be provided with temperature acquisition sensor 1 between external cylinder liner 4 and drive shaft 6, it is constituted temperature measurement circuit 10 by infrared laser temperature measurement sensor; Speed sensor is made of permanent magnet 62 and the rotational speed measurement circuit 11 that Hall sensor 63 forms; The torque measurement circuit 5 is to paste the strain gauge 65 and the resistor 64 on the transmission shaft 6 to form the torque measurement bridge circuit 12 and the power supply circuit 9; the signal acquisition and emission system 2 and the temperature acquisition The sensor 1, the rotation speed sensor 3 and the torque measuring circuit 5 are connected; and the signal acquisition and transmission system 2 is connected with the RFID receiver and the RFID receiver is then connected with the host computer, the portable processor and the printer;

When measuring, the on-board part of the real vehicle dynamic detection system is installed on the transmission shaft 6 between the clutch 8 and the rear axle differential 7, and the data is collected by the three units of the temperature acquisition sensor 1, the rotational speed sensor 3, and the torque measurement circuit 5. Sent to the signal processing unit, after A/D conversion, the signal is sent to the single-chip processing unit, and then through the RFID signal transmission system, the signal is transmitted to the RFID signal receiver by wireless transmission. After processing, the data can finally be separated Displayed on a computer, portable processor or printed out with a printer, it is convenient to analyze and compare the characteristics of the system.

Claims (1)

1. An automobile clutch comprehensive performance real vehicle dynamic telemetry device, characterized in that: it is composed of a temperature acquisition sensor, a rotational speed sensor, a torque measurement circuit, an external cylinder liner, an automobile transmission shaft, a signal acquisition and emission system, an RFID receiver, a computer , a portable processor, and a printer, wherein a temperature acquisition sensor is set between the outer cylinder liner and the transmission shaft, which is composed of an infrared laser temperature measurement sensor to form a temperature measurement circuit; the speed sensor is composed of a permanent magnet and a Hall sensor The speed measurement circuit; the torque measurement circuit is to paste the strain gauge and the resistance on the transmission shaft to form the torque measurement bridge circuit and the power circuit; the signal acquisition and emission system is connected with the temperature acquisition sensor, the speed sensor and the torque measurement circuit; and the signal acquisition and emission The system is connected with the RFID receiver; the RFID receiver is connected with the host computer, the portable processor and the printer.

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