JPH02105578U

JPH02105578U -

Info

Publication number: JPH02105578U
Application number: JP1495089U
Authority: JP
Priority date: 1989-02-10
Filing date: 1989-02-10
Publication date: 1990-08-22

Description

[Brief explanation of the drawing]

第１図から第６図までの図面は本考案の一実施
例を示すものであり、第１図はグロー制御装置の
回路ブロツク図、第２図はグローの温度―抵抗―
特性を示す図、第３図はグロー制御の一例を示す
タイムチヤート、第４図はマイクロコンピユータ
において、一定周期で起動されるタスクを示すフ
ローチヤート、第５図は第３図の制御を行うため
に実行されるグロー制御準備ルーチンのフローチ
ヤート、第６図は第３図の制御を行うために実行
されるグロー制御ルーチンのフローチヤートであ
る。第７図はグロー制御の他の例を示すタイムチ
ヤート、第８図は第７図の制御を行うために実行
されるグロー制御準備ルーチンのフローチヤート
、第９図は第７図の制御を行うために実行される
グロー制御ルーチンのフローチヤートである。１…グロー、１０…給電回路、１１…検出抵抗
、１２…スイツチング手段（リレー）、２０…コ
ンパレータ、３０…基準電圧発生回路、４１…通
電制御手段、４２…計時手段、４３…異常検出手
段。 The drawings from FIG. 1 to FIG. 6 show one embodiment of the present invention, and FIG. 1 is a circuit block diagram of a glow control device, and FIG. 2 is a diagram showing glow temperature-resistance.
Figure 3 is a time chart showing an example of glow control; Figure 4 is a flowchart showing tasks that are activated at regular intervals in a microcomputer; Figure 5 is a flowchart for performing the control shown in Figure 3. FIG. 6 is a flowchart of a glow control preparation routine executed to carry out the control shown in FIG. 3. FIG. 7 is a time chart showing another example of glow control, FIG. 8 is a flowchart of a glow control preparation routine executed to perform the control shown in FIG. 7, and FIG. 9 is a flowchart for performing the control shown in FIG. 7. 2 is a flowchart of a glow control routine executed for this purpose. DESCRIPTION OF SYMBOLS 1... Glow, 10... Power supply circuit, 11... Detection resistor, 12... Switching means (relay), 20... Comparator, 30... Reference voltage generation circuit, 41... Energization control means, 42... Timing means, 43... Abnormality detection means.

Claims

[Scope of Claim for Utility Model Registration] (a) A power supply circuit comprising a series circuit of a detection resistor and a switching means connected between the glow and the power supply; a comparator to which the input terminal is connected; (c) a reference voltage generation circuit that supplies a reference voltage to the other input terminal of the comparator; and (d) a control signal of an ON command to the switching means to energize the glow. At the same time, the output level of the comparator is monitored, and when the glow resistance value reaches the threshold resistance value and the output level of the comparator changes, the switching means is activated.
A glow control device further comprising: energization control means for transmitting a control signal of an FF command to stop energization to the glow;
A timer measures the elapsed time from the start of energization to the glow, and based on the elapsed time information from this timer and the output information of the comparator, the elapsed time from the start of energization until the output level of the comparator switches is calculated. A glow control device characterized by comprising an abnormality detection means for determining whether or not the time is within the permissible time range, and determining that there is a glow abnormality when the time is not within the permissible time range.