CN207623495U - Light tester for automobile semi-trailer lamp - Google Patents

Abstract

The utility model discloses a light tester for an automobile semi-trailer, which includes a test circuit and a test cable. The test circuit controls the test switches K1...Kn of the test circuit through a microcontroller to provide power for the lights of the automobile semi-trailer and test the switch. Test lamps L1...Ln in series on K1...Kn; select the circuit to be tested through the control panel or automatically control the light test by the microcontroller, and perform short-circuit detection through the current transformer to avoid short-circuit faults. The utility model has simple circuits, small and exquisite equipment, is easy to carry, and has simple organization and implementation procedures; no need to use a tractor, which saves energy; and it is also very convenient to observe the lights of the semi-trailer because there is no shelter from the tractor.

Description

Automobile semi-trailer light tester

technical field

The utility model relates to a light tester for an automobile semi-trailer, which belongs to the field of automobile detection equipment.

Background technique

The lighting system of the semi-trailer is one of the safety components of the car. The quality of the lighting of the semi-trailer has a direct relationship with safe driving. In order to improve transportation efficiency and reduce transportation costs, car freight usually adopts the drop-and-hook transportation method, that is, the semi-trailer and the tractor are often separated. When transferring goods, they need to be temporarily anchored. The inspection of the lighting system of the semi-trailer is a must before anchoring. One of the things to check. The semi-trailer lighting system is connected to the tractor through a 7-pin or 13-pin standard electrical connector. The semi-trailer lighting system is divided into position lights/marker lights/license plate lights, left turn lights, brake lights, right turn lights, and fog lights. The driving of the semi-trailer lights is realized through the special flashing control unit of the tractor. For the inspection of the lighting system of the semi-trailer, the more common method is to electrically connect the tractor and the semi-trailer, and check whether the lighting system of the semi-trailer is working properly in the real vehicle. This method has the following problems: first, it needs to use tractors, which is troublesome in organization and implementation; second, it wastes energy by using tractors; At present, there is no special equipment for semi-trailer signal system detection on the market.

Contents of the invention

The purpose of the utility model is an automobile semi-trailer light tester, which can replace the tractor to complete the light test work of the automobile semi-trailer.

In order to achieve the above object, the utility model is an automobile semi-trailer lighting tester, which includes a casing, a test circuit and a test cable, and the test circuit includes a test power supply and a signal output socket; between the test power supply and the signal output socket A number of test circuits are connected in parallel between each test circuit, and each test circuit is composed of a test lamp and a test switch in series, that is, test lamp L1,..., test lamp Ln and test switch K1,..., test switch Kn; test lamp It is used to indicate the continuity of the circuit, and the test switch is used for the gating control of the test circuit; the test cable is connected to the signal output socket.

When using the utility model to check the lights of the semi-trailer, it is only necessary to connect the utility model to the semi-trailer through a test cable, turn on the switches K1,..., switch Kn in turn, and observe the lights of the semi-trailer to determine. The utility model has the advantages of simple circuit, compact equipment, portability, and simple organization and implementation procedures; no need to use a tractor, which saves energy; and it is also very convenient to observe the lights of the semi-trailer because there is no shelter from the tractor.

Description of drawings

Fig. 1 is the electrical schematic diagram of the utility model;

Fig. 2 is the electrical schematic diagram of the improved embodiment of the present utility model;

Fig. 3 is the structural representation of the matching device of the present invention;

Figure 4 is a schematic diagram of the installation of the photoelectric isolator of the present invention.

Detailed ways

Below in conjunction with specific embodiment the utility model is further described:

As shown in Figure 1, a kind of automobile semi-trailer lighting tester comprises casing, test circuit and test cable, and described test circuit comprises test power supply and signal output socket; Parallel connection between described test power supply and signal output socket Several test loops, each test loop is composed of a test lamp and a test switch in series, that is, test lamp L1,..., test lamp Ln and test switch K1,..., test switch Kn; the test lamp is used for Loop continuity indication, the test switch is used for gating control of the test loop; the test cable is connected to the signal output socket.

When using the utility model to check the light of the semi-trailer, it is only necessary to connect the utility model to the semi-trailer through the test cable, and turn on the test switch K1,..., test switch Kn in turn, and the test power can be supplied to the semi-trailer through the test circuit. The lamps provide power, and you can determine whether the lamps and light circuits are normal by observing the lamps of the semi-trailer. The utility model has the advantages of simple circuit, exquisite structure, portability, and simple organization and implementation procedures; no need to use a tractor, which saves energy; and it is also very convenient to observe the lights of the semi-trailer because there is no shelter from the tractor.

Further, as shown in Fig. 2, the test switches K1, ..., test switches Kn are relay switches, and the test circuit also includes a microcontroller, a control panel and several triode switches G1.. for driving the relay switches. .Gn; the control panel is equipped with a manual/automatic selection switch and a gate switch for each test circuit; the gate switch is controlled by manual input; the microcontroller controls the test switches K1, . .., test switch Kn; the microcontroller collects switch information on the control panel, and when the manual/automatic switch is in the manual state, the microcontroller controls the corresponding test switch K1,..., The test switch Kn is turned on and off, and when the manual/automatic switch is in the automatic state, the microcontroller automatically controls the test switches K1, . . . , the test switch Kn to be turned on and off.

The above embodiment is an intelligent tester, which can be used for manual testing or automatic testing, and the testing efficiency is high.

Further, as shown in Figure 2, the utility model also includes a current transformer, which is connected to the 24V output terminal of the test power supply, and the microcontroller collects the induced current of the current transformer through A/D conversion. By setting the current transformer, a short circuit test can be performed on the light circuit of the semi-trailer. When there is a short circuit in the light circuit, a large current will appear in the test circuit, and the current transformer will generate a large current. The microcontroller will immediately cut off the inspection circuit and send a short circuit fault alarm through the indicator light.

Further, as shown in FIG. 2 , the utility model also includes an alarm, and the alarm is controlled by a microcontroller; the microcontroller judges the test result according to the current measured by the current transformer. When the mutual induction current of a certain light is zero, it can be judged that the circuit is open; when the mutual induction current of a certain light exceeds the normal value, it can be judged that the circuit is short circuited. When the above two situations occur, an alarm will be issued through the siren, and the short-circuit fault or open-circuit fault can be distinguished by changing the sound frequency of the siren. For example, a short-circuit alarm can be sent out, and a long-term and short-term alarm can be issued when the circuit is broken. The sound alarm can remind the test personnel to pay attention, and the effect is good.

Further, the utility model also includes a matcher, as shown in Figure 3, the matcher includes a cable head and several matching resistors R1...Rn; the matching resistors R1...Rn match the resistance of the car lamp , connected between the test signal point and the signal ground. Connect the matcher and the test circuit through the test cable, and match the resistance to the semi-trailer light to complete the self-test of the tester.

Further, the utility model also includes a short circuit, which is used for short circuiting each test signal output by the signal output socket and the signal ground. The principle of the short circuit is the same as that of the matching device, except that there is no matching resistance, and it is used for self-testing of the short circuit of the machine.

Further, in order to prevent the triode switches G1...Gn and test switches K1...Kn from interfering with the microcontroller, as shown in Figure 4, the utility model also includes several photoelectric isolators OC1...OCn, the micro The output signal of the controller enters the triode switch G1...Gn through the photoelectric isolator OC1...OCn.

ISO and national standards have standardized the interface between road vehicle traction and semi-trailer. The more commonly used ones include national standard 7-core 24N type, national standard 7-core 12N type, European 13-core, European 7-core and American 7-core. Interface, because in the actual implementation process, there are certain differences in the type selection and pin definition of the electrical connectors of the trucks produced by various manufacturers and even different types of trucks produced by the same manufacturer, tractors and semi-trailers. Users need to customize the pin usage of these interfaces. In order to adapt to the 7-core and 13-core interfaces at the same time, the utility model is equipped with two signal output sockets, that is, signal output socket I and signal output socket II.

Output socket Ⅰ is defined as:

(1) Ground wire

(2) Right marker line/position lamp/front position lamp/license plate lamp

(3) Left turn signal

(4) Brake lights

(5) Right turn signal

(6) Marking line on the left / position lights / front position lights / fog lights

(7) Reversing lights

Signal output socket II is defined as:

(1) Left turn signal

(2) Rear fog lights

(3) Ground wire

(4) Right turn signal

(5) Right driving night lights

(6) Brake lights

(7) Left driving night lights

(8) Reversing lights

(9) 12V battery

(10) battery charge or refrigerator charge

(11) Pin 10 ground wire

(12) Spare

(13) Pin 9 ground wire.

Claims (6)

1. A light tester for an automobile semi-trailer, comprising a casing, a test circuit and a test cable, characterized in that the test circuit comprises a test power supply and a signal output socket; several parallel connections between the test power supply and the signal output socket Test circuit, each test circuit is composed of a test lamp and a test switch in series, that is, test lamp L1,..., test lamp Ln and test switch K1,..., test switch Kn; the test lamp is used for loop communication The test switch is used for gating control of the test loop; the test cable is connected to the signal output socket. 2. The light tester for automobile semi-trailer according to claim 1, characterized in that, said test switch K1, ..., test switch Kn are relay switches, and said test circuit also includes a microcontroller, a control panel and A number of triode switches G1...Gn for driving relay switches; the control panel is equipped with a manual/automatic selection switch and a strobe switch for each test circuit; the microcontroller controls the test switch K1 through the triode switches G1...Gn ,..., test switch Kn; the microcontroller collects the switch information on the control panel, when the manual/automatic switch is in the manual state, the microcontroller controls the corresponding test switch K1, .. ., the test switch Kn is turned on and off, when the manual/automatic switch is in the automatic state, the microcontroller automatically controls the test switches K1, ..., the test switch Kn to be turned on and off. 3. The automobile semi-trailer lighting tester according to claim 2, further comprising a current transformer, the current transformer is connected to the 24V output terminal of the power supply circuit, and the microcontroller collects the current through A/D conversion The induced current of the transformer. 4. The light tester for an automobile semi-trailer according to claim 3, further comprising an alarm, and the alarm is controlled by a microcontroller. 5. The automotive semi-trailer light tester according to any one of claims 1 to 4, characterized in that it also includes a matching device, the matching device includes a cable head and several matching resistors R1...Rn; The above-mentioned matching resistors R1...Rn match the resistance of the car lamp, and are connected between the test signal point and the signal ground. 6 . The light tester for a semi-trailer of an automobile according to claim 5 , further comprising a short circuit, the short circuit is used for short-circuiting each test signal output by the signal output socket and the signal ground.