Measuring and counting instrument

Abstract

The utility model discloses a measuring and counting instrument which comprises a shell, a button is arranged on the surface of the shell, a measuring and counting circuit is arranged in the shell and comprises a power source U, a switch K, a single-chip microcomputer signal control module MCU, a measured electric device R and a counter, one end of the switch K is connected with the power source U, and the other end of the switch K is connected with the single-chip microcomputer signal control module MCU. The MCU is divided into two paths of high-side output, one path is connected with the tested electric device R, the other path is connected with the counter, and the switch K is connected with the button. According to the utility model, through designing the circuit for testing the automobile electric device, measurement and counting can be carried out according to different electric device design output time and intervals, so that the service life and reliability of the electric device can be measured under the condition close to the actual working condition.

Description

Technical Field

[0001] The utility model relates to the field of passenger car testing and counting, in particular to a measuring and counting instrument. Background Art

[0002] With technological advancements and increasing passenger expectations for user experience, public transportation is moving beyond mere usability to become more user-friendly and durable. Consequently, functional verification of the stability and durability of bus components and assemblies will become increasingly important. Designing a measuring instrument to automatically test the stability and durability of electrical components is essential reliability verification for bus quality testing.

[0003] Therefore, there is an urgent need to provide a measuring and counting instrument that can measure the reliability and durability of automotive electrical components to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a measuring and counting instrument which can measure the service life and reliability of different electrical components under conditions close to actual working conditions.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing a measuring and counting instrument, including a shell, a button is provided on the surface of the shell, and a measuring and counting circuit is provided in the shell. The measuring and counting circuit includes a power supply U, a switch K, a single-chip microcomputer signal control module MCU, a measured electrical device R, and a counter. One end of the switch K is connected to the power supply U, and the other end is connected to the single-chip microcomputer signal control module MCU. The MCU is divided into two high-side outputs, one is connected to the measured electrical device R, and the other is connected to the counter. The switch K is connected to the button.

[0006] In a preferred embodiment of the present invention, one output of the single chip microcomputer signal control module MCU is connected to the measured electrical device R through a first high-side output module, and another output is connected to a counter through a second high-side output module.

[0007] Furthermore, the first high-side output module and the second high-side output module both adopt BTS443.

[0008] In a preferred embodiment of the present invention, a plurality of heat dissipation holes are provided on the surface of the shell.

[0009] In a preferred embodiment of the present invention, ear plates are respectively provided on both side surfaces of the shell, and mounting holes are opened on the ear plates.

[0010] In a preferred embodiment of the present invention, the single-chip signal control module MCU adopts Freescale MC9S08DZ60 single-chip microcomputer.

[0011] In a preferred embodiment of the present invention, the counter is a SANTEN H7EC digital counter.

[0012] The beneficial effect of the utility model is that the utility model designs a circuit for testing automobile electrical components, which can measure and count according to the output time and interval designed for different electrical components, thereby realizing the measurement of the service life and reliability of the electrical components under conditions close to actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a preferred embodiment of the measuring and counting instrument of the utility model;

[0014] Figure 2 yes Figure 1 Side view of;

[0015] Figure 3 yes Figure 1 A top view of

[0016] Figure 4 yes Figure 1 Bottom view of

[0017] Figure 5 1 is a circuit schematic diagram of the measurement and counting circuit.

[0018] The components in the accompanying drawings are marked as follows: 1. housing, 2. button, 3. heat dissipation hole, 4. ear plate, 5. mounting hole, 6. small hole. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0020] See also Figures 1 to 4 , the embodiments of the present utility model include:

[0021] A measuring and counting instrument comprises a housing 1, housing a measuring and counting circuit. The housing 1 is provided with a button 2 and several heat dissipation holes 3. The button 2 is used to turn the instrument on and off, while the heat dissipation holes 3 serve both as heat dissipation and as amplification. To facilitate installation in a test environment to simulate the actual operating conditions of the electrical device under test, lugs 4 are provided on each side of the housing 1, each with a mounting hole 5. A small hole 6 is also provided in the lower portion of the housing for the external lead wires.

[0022] Preferably, the shell 1 is made of the fireproof material with the highest flame retardancy in the bus industry (V-0 grade), which has high integration, full functions, high quality, high reliability, waterproof and dustproof; it is small in size and easy to install, which improves line safety and reduces costs.

[0023] The measurement and counting circuit includes a power supply U, a switch K, a single-chip microcomputer signal control module MCU, an electrical device under test R, and a counter. One end of the switch K is connected to the power supply U, and the other end is connected to the single-chip microcomputer signal control module MCU. The MCU has two high-side outputs: one connected to the electrical device under test R, and the other connected to the counter. The other ends of the electrical device under test R and the counter are both grounded. The switch K is connected to a button.

[0024] One output of the single-chip microcomputer signal control module MCU is connected to the measured electrical device R via a first high-side output module, and another output is connected to a counter via a second high-side output module. Preferably, both the first and second high-side output modules utilize a BTS443. The single-chip microcomputer signal control module MCU utilizes a Freescale MC9S08DZ60 microcontroller, which can adjust program-controlled output time and intervals based on the operating conditions of different electrical devices. The counter is an independent counting device, employing a SANTEN H7EC digital counter. The power supply U converts external power to the required internal power and can utilize a commercially available voltage converter.

[0025] The measurement and counting circuit is designed on an internal printed circuit board with no flying wires, high-performance components, life-long service life, high integration, clear layout and good shock resistance.

[0026] Take the measurement of the electric horn of a city bus as an example to illustrate the circuit principle of the measurement counting circuit. Figure 5 Considering the operating conditions of the electric horn, the MCU signal control module is set to control the BTS443 to output a 24V high level for 2 seconds, then stop outputting after 2 seconds. After 10 seconds, the BTS443 controls the output to output a high level for 2 seconds again, repeating this output cycle. The first high-side output module is connected to the electric horn, and the second high-side output module is connected to a counter. This records the number of times the electric horn is used under simulated actual operating conditions, thereby measuring the electric horn's service life and reliability.

[0027] The utility model designs the automobile electrical component testing circuit, which can measure and count according to the designed output time and interval of different electrical components, thereby realizing the measurement of the service life and reliability of the electrical components under conditions close to actual working conditions.

[0028] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A measuring and counting instrument, comprising a housing, characterized in that: A button is provided on the surface of the shell, and a measurement and counting circuit is provided inside the shell. The measurement and counting circuit includes a power supply U, a switch K, a single-chip microcomputer signal control module MCU, a measured electrical device R, and a counter. One end of the switch K is connected to the power supply U, and the other end is connected to the single-chip microcomputer signal control module MCU. The MCU is divided into two high-side outputs, one is connected to the measured electrical device R, and the other is connected to the counter. The switch K is connected to the button.

2. The measuring and counting instrument according to claim 1, characterized in that: One output of the single chip computer signal control module MCU is connected to the measured electrical device R through the first high side output module, and the other output is connected to the counter through the second high side output module.

3. The measuring and counting instrument according to claim 2, characterized in that: The first high-side output module and the second high-side output module both use BTS443.

4. The measuring and counting instrument according to claim 1, characterized in that: The shell surface is provided with a plurality of heat dissipation holes.

5. The measuring and counting instrument according to claim 1, characterized in that: Two side surfaces of the shell are respectively provided with ear plates, and mounting holes are opened on the ear plates.

6. The measuring and counting instrument according to claim 1, characterized in that: The single chip microcomputer signal control module MCU adopts Freescale MC9S08DZ60 single chip microcomputer.

7. The measuring and counting instrument according to claim 1, characterized in that: The counter adopts a SANTEN H7EC digital counter.

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