CN203551125U - Over-temperature alarm circuit - Google Patents
Over-temperature alarm circuit Download PDFInfo
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- CN203551125U CN203551125U CN201320680735.4U CN201320680735U CN203551125U CN 203551125 U CN203551125 U CN 203551125U CN 201320680735 U CN201320680735 U CN 201320680735U CN 203551125 U CN203551125 U CN 203551125U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000012546 transfer Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 abstract description 17
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000012806 monitoring device Methods 0.000 abstract 1
- 230000003321 amplification Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The utility model relates to an over-temperature alarm circuit. Internal temperature of equipment is measured by a temperature sensor, output signals (current signals) of the temperature sensor get into an amplifier so as to be amplified after current-voltage conversion, the output signals (current signals) are compared with a preset reference temperature value (voltage signals) through a comparator, a comparison result is processed by an anti-interference circuit and an over-temperature alarm signal with an anti-interference capability is outputted. When the internal temperature of the equipment is higher than the reference temperature, the alarm signal is effective; and when the internal temperature of the equipment is lower than the reference temperature, the equipment operates normally. The over-temperature alarm circuit solves a technical problem that a temperature monitoring device of existing automatic testing equipment in the prior art is poor in or does not have the anti-interference capability, is capable of monitoring the internal temperature of the automatic testing equipment in real time, judges whether the current operating temperature exceeds the normal operating temperature range of instruments and equipment or not at the same time, effectively ensures the health running of the automatic testing equipment, and has the anti-interference capability and high reliability.
Description
Technical field
The invention belongs to ATE (automatic test equipment) resist technology, is a kind of overtemperature alarm circuit of avoiding instrument and equipment working temperature overrun integrated in ATE (automatic test equipment) to design.
Background technology
ATE (automatic test equipment) is the core component of batch production line, and its price is very expensive.ATE (automatic test equipment) realizes based on goods shelf productses such as modular instrument, desktop computer and test buss when hardware integration at present.The normal working temperature scope of these instruments, equipment is generally 0 ℃～55 ℃.The monitoring of equipment working temperature is an important component part of ATE (automatic test equipment) resist technology.During ATE (automatic test equipment) work, some high power device heat radiation in equipment is not smooth, the reasons such as equipment, line fault and heat dissipation channel obstruction, the working temperature overrun of ATE (automatic test equipment) Instrumental, equipment is caused in capital, this situation may cause device hardware damage, even damage.In most ATE (automatic test equipment), there is no device for monitoring temperature or only have the device for monitoring temperature that easily, do not possess antijamming capability (use this class device often can cause false-alarm and jamming equipment normally work), lack the reliable protective capability of ATE (automatic test equipment).Therefore,, for guaranteeing the health operation of ATE (automatic test equipment), it is very necessary designing a kind of overtemperature alarm circuit with antijamming capability and high reliability.
Summary of the invention
The technical matters that lacks and do not possess antijamming capability for solving device for monitoring temperature in existing ATE (automatic test equipment), the invention provides a kind of overtemperature alarm circuit.
Technical solution of the present invention is as follows:
An overtemperature alarm circuit, comprises temperature sensor U1, modulate circuit, comparer U3, and its special character is:
Described modulate circuit comprises stream voltage conversion circuit and see-saw circuit U2,
Described temperature sensor U1 is used for gathering environment temperature and temperature signal is converted to current signal, its output terminal is connected with the input end of stream voltage conversion circuit, described stream voltage conversion circuit is for being converted to voltage signal by current signal, its output terminal is connected with the input end of see-saw circuit, described see-saw circuit is for amplifying voltage signal, its output terminal is connected with an input end of comparer
Described overtemperature alarm circuit also comprises anti-jamming circuit, and described anti-jamming circuit is single-ended transfer difference circuit, and the input end of described single-ended transfer difference circuit is connected with the output terminal of comparator circuit, the output terminal output alarm signal of described single-ended transfer difference circuit.
Above-mentioned see-saw circuit comprises the first operational amplifier U2, the input end in the same way of described the first operational amplifier U2 is by resistance R 4 ground connection, the reverse input end of described the first operational amplifier U2 is connected with the output terminal of stream voltage conversion circuit by resistance R 3, and between the reverse input end of described the first operational amplifier U2 and output terminal, cross-over connection has feedback resistance R5.
Above-mentioned stream voltage conversion circuit comprises resistance R 1 and the R2 being cascaded, and described resistance R 2 is adjustable resistance, and the adjustable side of described resistance R 2 is connected with the signal input part of see-saw circuit, the other end ground connection of described resistance R 1.
The input end in the same way of above-mentioned comparer U3 is connected with the output terminal of the first operational amplifier U2, and the reverse input end of described comparer U3 is connected with reference signal circuit.
Above-mentioned the first operational amplifier U2 can select LM324 chip.
Above-mentioned comparer U3 can select LM311 chip.
Said temperature sensor U1 can select AD590.
Above-mentioned single-ended transfer difference circuit is selected four differential lines driver AM26LS31CD.
The utility model can Real-Time Monitoring ATE (automatic test equipment) internal temperature, judge whether current operating temperature exceeds the normal working temperature scope of instrument and equipment simultaneously, effectively guarantee the health operation of ATE (automatic test equipment), and there is antijamming capability and high reliability.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is an embodiment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is principle of the present utility model, temperature sensor measurement device interior temperature for the utility model, the output signal of this temperature sensor (current signal) enters amplifier and amplifies after current-voltage conversion, by comparer and default reference temperature value (voltage signal) relatively, comparative result is after anti-jamming circuit is processed, and output device is for the overtemperature alarm signal of antijamming capability.When device interior temperature is during higher than reference temperature, alerting signal is effective; When device interior temperature is during lower than reference temperature, equipment is normally worked.
Fig. 2 is the preferred embodiment of the utility model, and in this circuit, temperature sensor U1 selects AD590, and the first operational amplifier U2 selects LM324 chip, and comparer U3 selects LM311 chip, and anti-jamming circuit is selected four differential lines driver AM26LS31CD.
The supply voltage of temperature sensor AD 590 is 5V, after it by device interior temperature transition is output current (microampere order electric current), by precision resistance R1, R2, flow and press conversion, output voltage enters an operational amplifier of LM324 chip, this operational amplifier carries out anti-phase amplification to voltage signal, amplifier out connects the in-phase input end of comparer LM311, the inverting input input reference voltage value of LM311 (reference voltage is according to fixedly obtaining after computing formula calculating).When reference temperature is 55 ℃, the reference voltage obtaining after calculating is 4.4V, when in-phase input end virtual voltage is during higher than inverting input reference voltage, namely when actual temperature is during higher than reference temperature, comparer LM311 is output as " high level 1 ", be pulled to an input end that exports four differential lines driver AM26LS31CD after 5V to, the output terminal output difference alerting signal of four differential lines driver AM26LS31CD; Otherwise when in-phase input end virtual voltage is during lower than inverting input reference voltage, namely, when actual temperature is during lower than reference temperature, comparer LM311 is output as " low level 0 ", the output terminal of four differential lines driver AM26LS31CD is output alarm signal not.
Claims (8)
1. an overtemperature alarm circuit, comprises temperature sensor U1, modulate circuit, comparer U3, it is characterized in that:
Described modulate circuit comprises stream voltage conversion circuit and see-saw circuit U2,
Described temperature sensor U1 is used for gathering environment temperature and temperature signal is converted to current signal, its output terminal is connected with the input end of stream voltage conversion circuit, described stream voltage conversion circuit is for being converted to voltage signal by current signal, its output terminal is connected with the input end of see-saw circuit, described see-saw circuit is for amplifying voltage signal, its output terminal is connected with an input end of comparer
Described overtemperature alarm circuit also comprises anti-jamming circuit, and described anti-jamming circuit is single-ended transfer difference circuit, and the input end of described single-ended transfer difference circuit is connected with the output terminal of comparator circuit, the output terminal output alarm signal of described single-ended transfer difference circuit.
2. overtemperature alarm circuit according to claim 1, it is characterized in that: described see-saw circuit comprises the first operational amplifier U2, the input end in the same way of described the first operational amplifier U2 is by resistance R 4 ground connection, the reverse input end of described the first operational amplifier U2 is connected with the output terminal of stream voltage conversion circuit by resistance R 3, and between the reverse input end of described the first operational amplifier U2 and output terminal, cross-over connection has feedback resistance R5.
3. overtemperature alarm circuit according to claim 1 and 2, it is characterized in that: described stream voltage conversion circuit comprises resistance R 1 and the R2 being cascaded, described resistance R 2 is adjustable resistance, the adjustable side of described resistance R 2 is connected with the signal input part of see-saw circuit, the other end ground connection of described resistance R 1.
4. overtemperature alarm circuit according to claim 1 and 2, is characterized in that: the input end in the same way of described comparer U3 is connected with the output terminal of the first operational amplifier U2, and the reverse input end of described comparer U3 is connected with reference signal circuit.
5. overtemperature alarm circuit according to claim 4, is characterized in that: described the first operational amplifier U2 can select LM324 chip.
6. overtemperature alarm circuit according to claim 4, is characterized in that: described comparer U3 can select LM311 chip.
7. overtemperature alarm circuit according to claim 4, is characterized in that: described temperature sensor U1 can select AD590.
8. overtemperature alarm circuit according to claim 4, is characterized in that: described single-ended transfer difference circuit is selected four differential lines driver AM26LS31CD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320680735.4U CN203551125U (en) | 2013-10-30 | 2013-10-30 | Over-temperature alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320680735.4U CN203551125U (en) | 2013-10-30 | 2013-10-30 | Over-temperature alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551125U true CN203551125U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320680735.4U Expired - Lifetime CN203551125U (en) | 2013-10-30 | 2013-10-30 | Over-temperature alarm circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203551125U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152543A (en) * | 2018-01-19 | 2018-06-12 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of electric energy metering wiring box with fault alarm function |
| CN109188126A (en) * | 2018-08-22 | 2019-01-11 | 深圳市矽电半导体设备有限公司 | A kind of ESD equipment operation condition monitoring device and its monitoring method |
| CN111934281A (en) * | 2020-08-10 | 2020-11-13 | 迈普通信技术股份有限公司 | Electronic equipment overtemperature protection circuit, electronic equipment and overtemperature protection control method |
-
2013
- 2013-10-30 CN CN201320680735.4U patent/CN203551125U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152543A (en) * | 2018-01-19 | 2018-06-12 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of electric energy metering wiring box with fault alarm function |
| CN108152543B (en) * | 2018-01-19 | 2023-06-23 | 国网江苏省电力有限公司宿迁供电分公司 | Electric energy metering junction box with fault alarm function |
| CN109188126A (en) * | 2018-08-22 | 2019-01-11 | 深圳市矽电半导体设备有限公司 | A kind of ESD equipment operation condition monitoring device and its monitoring method |
| CN111934281A (en) * | 2020-08-10 | 2020-11-13 | 迈普通信技术股份有限公司 | Electronic equipment overtemperature protection circuit, electronic equipment and overtemperature protection control method |
| CN111934281B (en) * | 2020-08-10 | 2022-06-03 | 迈普通信技术股份有限公司 | Electronic equipment overtemperature protection circuit, electronic equipment and overtemperature protection control method |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
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| CX01 | Expiry of patent term |